My compliments to the "son of the MP" who shoots all the video and probably has to edit it as well. Silently taking one for the team with things like gently moving the graphs into the sun for a better camera shot, always listening to the MP's words, and moving the camera to show what's currently being discussed with no fuss etc.. Most people never notice things like that, and he deserves some props, because it allows people to follow the MP without being distracted by a bad cameraman.
hard not to notice - distracting try multiple cameras with cuts, or cropping from a 4k source in the edit Job accomplished as is; but since you bring it up, there are smoother ways to do it
Your videos could be better if the cameraman avoided viewing angles that caused the digital meters to be unreadable due to light reflections. Some type of stabilized hand mount would also be a plus, and intentional pans and tilts should be slower.
The extemporaneous lecturing might be more accessible if some scripting were involved. For some of this (and the original video), I felt I was trying to drink a firehose of knowledge with gardenhose training.
It amazes me how easy these things are telled … some scientific terms are necessary in my opinion, but it’s faster and more lasting than nearly any lecturer at my university… love every video
@@Victor-tl4dk if you need simpler language then you need to study more. i thought he explained things well in an easily understandable way. dumbing it down to "Man do science things and make cold air" "I put tube thing here and things move inside making air cold" it just makes it harder for everyone to understand what he's doing scientifically. that's why people use specific terms to make it more understandable. its not to confuse people.
It would be awesome to see a updated prototype after 3 years to see if you had any ideas on increases in efficiency, especially combined with your solar setup and the stay cool paint. And thanks again for all the content, its always extremely inspiring.
You built an air cycle machine! When I was in the Air Force, I was an AGE mechanic and we had a unit that cooled air down so much it was frosty at the end of the duct. It was the -10 air cycle machine and it took heated (215 F) compressed air from the -60 start cart/generator/air compressor and turned it into frosty forced dry air (-10 F at the duct end), using nothing but dehydrators, heat sinks and speeding up the compressed air via Venturi restrictions. I always wondered why there was no civilian equivalent but then I figured nobody has a jet powered air compressor to feed the machine compressed air. But you found a way to do it without compressing the air! Lovely!
I heard a serviceman say something about this more years ago than I care to admit, but when I tried to find information on it years later, I couldn't find anyone who had hear anything about it. You sir, have just made my day as now I have another source mentioning this and now know I wasn't imagining it. Thank you for this and thank you for your service.
As someone who has been in the HVAC industry for 30 years and has tested commercial equipment in a psychrometric chamber I appreciate your creativity. I followed along and your system air flow is about 250 CFM and produces about 2000 BTU/Hr of sensible heat 0 BTU/Hr of latent heat at an EER of 11.7. Interesting concept using liquid desiccant! Great video!
It’s easy for those of us with decades of experience in commercial AC systems to point out all the flaws or say “this has been done before.” What kept me interested through both videos is the use of a liquid desiccant (which I didn’t know existed!). The efficiencies can be improved significantly in all steps if the process as many have pointed out. This is a proof of concept and it is very interesting! I appreciate the honest data at the end.
A prototype is seldom given no changes in the evolution to type1 and the observation of this fact is even less obvious to most of the population. There is a reason the FULL AUTO 40mm grenade launcher is called an MK19. SEPARATE Do you see a way to use the liquid desiccant to improve the effectiveness of the external coil in a traditional heat pomp in cooling mode.
for real haha. I got kicked out of physical science class often and didn't hand in projects. yet somehow this is one of my favorite channels on youtube. I think a lot of teachers just have no passion to share with the students. to them it's just a job and a paycheck.
@@chrishayes5755 That's usually not the issue, but rather the rigidity of modern education wears teachers down with frustration, along with the unreasonable kids and unreasonable parents. The unreasonable camp has been given a voice now, they make teachers miserable and there is nothing teachers can do about it. So hard to understand until you become a teacher.
What classes would he teach at your school. 'Shop' is naturally one of them at my small school but he would also be effective teaching 'Maths for Engineers' including 'Geometry and Calculus for C students' . He is so Cool he could teach 'American History for Stoners'. OK, Your turn
I'm an engineering student, currently drawing plans for a house and workshop I'd very much like to build in my lifetime. This channel, more than any other informs so many of my structural and hvac designs.. Simply amazing, I could watch this channel every minute of every day - even 10 runs through the same video I'll learn some little thing, something less considered. Youre responsible for so many redraws of my designs and I love you for it ❤ Never change.
as a pipe and duct routing engineer, i have some tips! 1 insulate the duct that go in and out of the house. you could use insulated spiro ducts with silencers and plenums so you have a more quiet system and also less leaked heat from outside. 2 make the swampcooler bigger and 2 stage it to reach even lower temps for the coolant for the exchanger. 3 stack the radiator in series on the bigger swampcoolers. saves on the 2 radiator fans. i think you are getting close, it needs some balancing
darkevilapie, all sounds very good (except the high cost of insulated spiral ductwork-I expect everyone interested in this project would insulate the ductwork with insulation bats)
What I want to see is to put the whole thing under a roof to block off solar radiation, and put the solar waterheater on top of that roof to save some space, and if possible, show us how to run the thing at night when there is no sun as heater, etc, so many ideas...
@@4IN14094 To run at night, maybe fill a tank with hot dry desiccant during the day. Then run the desiccant through the swamp cooler and adsorption room cooler and into another tank during the night. Wonder if the tank volumes would be practical.
You know years later I realized that what you built is essentially an industrial open loop absorbtion cycle refrigeration system. Or water loop refrigeration. Which now I want to build a bunch to experiment with various compounds. And test their performance. Great videos by the way.
Spoiler alert, Ammonia is about the best without getting super over the top with the system design.. its why industrial refridge systems use it, also "3 way fridges" you find in caravans and I believe some marine fridges.
Would be interesting to see a short update with your longer term performance, once you optimize the operation of your columns, pumps and fans. A former Chemical Engineer, but really like seeing practical uses for that around the home. Good work & Good Luck!
As an undergraduate Mechanical Engineer I find your videos awe inspiring. Some people may look at this venture and put it down to a persons desire to make money from youtube, however like many other people i feel like you are doing this for a greater good. I see that you have decided to make your life about educating strangers to the wonders of science, math and the universe. I sense that you are a man of gifting, and for that i must say as a complete stranger i deeply respect you. God speed Sir, keep it up.
Thanks and you are correct. It would be far easier to generate views and money with visually impressive, but poorly explained and demonstrated projects.
@@TechIngredients Was this system designed with any knowledge of Ammonia systems in mind or was it an independent idea. If not, what was the reasoning for chosing CaCl instead?
If you're using solar panels to run the fans and pumps and then put cooling coils on the back of the photovoltaic panels, you could cool the panels and make them more efficient while heating your desiccant. Love watching your videos.
@@grrkaa8450 „a lot of efficiency“ you are talking about single digit percentages of efficiency gains here mate! I studied Solar cells for many years, so while you are right the thermic expansion in both ways when you are stealing their heat could then lead to cracks in the substrate or interconnections, shortening the lifespan of the solar cell. Don‘t forget that when thinking about heating and cooling, it‘ll always lead to expansion and shrinkage of materials present…
More like two weeks. I suspect he has several cats in the fire at once. I myself can never do just one project at a time. My projects feed each other and amplify my productivity and inspiration.
this was really well made and concise.I was looking for the typical fudging of numbers to make it better than it is supposed to be and the ensuing tall claims,but you surprised me by your rigor of the scientific method and complete honesty at the conclusion, thanks for taking the time to document all this and hope you have great day
@@TechIngredients ever looked at a vortex tube.??.a big one,with minus temps,run on lpg compressor. just spin it round from winter to summer..free ish heat/cool,with no a/c gas .mine works in hot ,like 40c conditions,yours would heat up if not fully insulated.indoors.temp doesnt effect pressure as much,.like a steam train will go higher than a diesel train. we are kept dumb & paying for services..
Nobody will watch this channel with me because it is so technical, but don't ever change it. Do I understand each nuance or formula; No. But I know where to come to re-examine it later. I love the presentation, the cooperation and effort it takes to produce it, and the information it provides.
I wonder how much more efficient and compact this could be made through the mechanical design. For example, coaxial fans and coaxial pumps to reduce the number of motors, using spray jets instead of shower heads and having the wort chiller replaced with a submerged radiator in the bottom of the third column.
Nice job! You are getting there! Suggestions: insulate the ducts. Flip the wye fitting for better air flow and Design a way that the water doesn’t get in the fan. The pressure drop of the air flow thru the wye fitting as you have it it huge. It is decreasing the flow making that turn. Redesign that part. Atomized nozzles are available for the spray heads. Take a look at a Kathabar system. Works on same principle. I have their design manual used for clean rooms. Next, use a psychometric chart instead of the engineering toolbox graph. You can obtain sensible and latent heat energy, vapor pressure, all properties of moist air. Use a wet bulb and dry bulb thermometer for more accurate results. Humidity meters unless very expensive ones aren’t very accurate. Kathabar design manual would be a huge help for you. They sale every piece of these systems for large industrial scale projects for liquid Desiccant. Check it out. No matter how you slice it, it’s gonna take a lot of energy to remove the heat energy from a space. I feel water source heat pump is still a great way to go. Keep up good work.
What a beautiful mind sharing his knowledge with the whole world. I am a Structural Engineer, but this gentle man has made me to look into building serviices. Thank you for widening my understanding of air conditioning.
Interesting concept. Few things that should be noted. 1. You should insulate your thin refrigeration lines. Low volume to surface area ratio on your lines means you likely are losing notable amounts of efficiency there. 2. You could get more evaporation if your radiator was at the bottom of your swamp cooler to heat the water you are evaporating with the fan. Minimizing the energy difference needed for evaporation = more evaporation caused by your fan. More heat causing evaporation means you'll have more cooling potential. Adding more heat here even through electrical power would be the quickest way to get more cooling. 3. As others have mentioned having IR reflecting glass likely is making your desiccant not absorb as much heat as possible. Normal glass would likely be better as it would stop losses due to hot air radiating away which is the main way to build up heat. Possibly could use aluminum/mirrors to focus more heat on it also like a solar oven, but you could just scale this up for the same effect. 3. Most commercial desiccant cooling systems use either use desiccant that is regenerated through compressor heat as you've mentioned. The main reason is a closed compressor system is not effected by outside humidity. A swamp cooler becomes near useless in high humidity environments. Wonder if just focusing on more solar heat & using an expansion valve for your desiccant solution would give you better performance that didn't care about the humidity.
would using a compressor negate one of the big upsides though which would be silent operating volume? in a lot of commercial applications the noise is quite a big factor to take in to consideration even if the unit is mounted outside.
@@grandeur7420 Compressor would likely make noise but the main use of dessicant air conditioners traditionally is in hot humid climates or indoor/greenhouse grows. In both operations you want to cool and remove humidity. Dessicant air conditioners exist in the industrial space and watching the shortcomings of this design drives home the reason companies have went with theirs imo. Swamp coolers will still have fan noise. So I don't think your noise level would be significantly higher with a normal air conditioner than this to be honest.
In regards to the compressor, I guess it depends on what your goal with the design is. If you're trying to achieve maximum efficiency in a device/system that would be manufactured in a plant, then yes I agree. However, if you're trying to design a DIY instruction set that a layman can put together with extremely easily sourced parts which will give manufactured systems a run for their money, then I disagree. I think one of the attractions of this system is this DIY aspect. Everything in the design so far is easy-peasy, no special tools required. There are plenty of children (thinking high school) who could safely build the system in this video. Add a compressor and the same cannot be said, however again it depends on your goal. Thumbs up anyways, good points overall.
My dad was a director of a company called GEA Grenco Refrigeration and I worked there for him and we was working on a similar system to this to possibly be used on cruise ships. Obviously much larger but the principle and set up was very similar. Sadly my dad passed in 2002 so it was never brought to fruition but I have many many fond memories of our time together.
Plenty of cool salt water there and no need to use old warmed water either. And plenty of heat free otherwise being exhausted from clothes dryers, kitchens, engine room heat and likely many other sources. Thanks for sharing that.
Rick Fischer absolutely they need to be put into digital form or scanned in which I can arrange. I am sure my brother still has them somewhere as he cleared my mums property after she passed away in 2016 I’ll keep you posted.
Thanks for measuring the power at AC! I think on the lab bench you measured only DC power coming from adjustable power supplies. Measuring at AC includes inefficiencies of AC->DC conversion. Bravo!
Just now finding these videos. I must say, the most impressive skill this man possesses is the ability to explain everything without a prompter, in an understandable manner, probably even without a script. Plus an awesome capacity to make calculations on the fly. And as PappyMan says, a top-notch cameraman.
17:45 Flow velocity in the center of the duct will be up to 2x higher than the average velocity throughout all of the cross-section (as it is used in for the calculation). This should be accounted for when calculating the performance of the system. Thank you for all the detailed and simple explanations in your videos!
@@ZipZoomZip yes i see what you are saying. If i just took a center point reading i would use a correction factor of .90. But i never experienced 2X the flow in the center of the duct. I usually took a series of readings on larger ducts but a small round its not that critical.
This is very demonstrative of how well he's used to explaining things in a fool-proof manner - it is far better to assume the audience knows nothing and over explain than to skip something that is "self evident" and confuse a portion of the audience.
Get a Bete nozzle and atomize the spray for efficiency boost I bet! Chemical engineer who specializes in scrubber tech You could also use column packing as well
@@lohphat , I think smaller is better as long as the water volume is the same...unless they are so small they are lifted out by the air, or are wasting energy to make them so small that they can't absorb more heat by being smaller.
Coming from a HVAC mechanic, this is a cool concept! Insulating the flow tubing after the heat exchangers to minimise temperature loss might be a good idea in higher ambient days. But a 3-4k supply/return temperature difference is pretty low, will definitely struggle to bring room temp down with extra heat load.
hear me out, what if we build a parabolic mirror with an old antenna and a bit of mylar and build a solar tracking device to reflect 1000w/m2 to that box. That would be a hell of a temp. difference
You can also reduce water pump wattage, if, instead of just "clamping-off flow", you use a valve to direct unused water flow/pressure, back to the pump. It removes the "stress" of pressure on the pump and you can tune the "flow" to your desired need.
@@josemilian4167 Imagine the pump's supply line splits into a "T". One side of the "T" goes to it's normal "supply" destination, the other side flows right back around into the pump's inlet, creating a loop with itself. Now we can start to tune the system by closing one side of the "T" or the other. If the "supply" side of the "T" is receiving too much flow, we can clamp the line slightly and the excess pressure will be re-directed into the unrestricted "loop". If the "supply" side of the "T" is receiving too little flow we can clamp the "loop" side slightly and more flow will be directed into the unrestricted "supply" side. The important thing to note is that there is always an unrestricted line for the pump to push water through. The pump will be moving more water volume, but be straining less in the process, saving electricity.
@@nilmemory7619 In common centrifugal pumps, this happens inside the pump. When the valve is closed, water will rotate inside the pump impeller without going anywhere. You can see that the power required to operate the water pump goes down as the valve is closed. When the valve is opened again, the power used goes up as the water starts to flow again. Then there are piston pumps, that behaves in totally opposite manner. Selecting the correct type of water pump is always critical.
Greetings from Germany. Your first video inspired me to build a setup on my own based on your idea. I came across the same problems. I also change the diameter from DN 110 to DN 160. For the Bioballs I used another approach. To prevent them from forming a dense cluster I separated them in layers, 5 40mm balls in a layer, the layers divided by a stainless steel net. I also noticed that when I turned off the water pump in the the swamp cooler the air temperature drops even further (of course just for a moment because no water means no evaporation), so there can be too much water. In the next test I want to try out either reducing the flow or switching the pump in intervals. Unfortunately the summer is over and I have to wait till next year for further testing. The test setup I am building is a simplified version of the one you where showing in the first video. To separate the cold from the wet in the exhaust air from the swamp cooler I am going to use an air to air heat exchanger (non enthalpy one). As I said before unfortunately the summer is over and I can´t test the setup anymore but the good thing is the whole system is modular. So I can use the heat exchanger I already bought to build a ventilation system with heat recovery for the winter. Whilst I was looking up air to air heat exchangers I saw some nice DIY ones made from PVC plumbing pipe and oversized drinking straws. Which would made them cheap, non enthalpy and corrosive resistant. The small solar heater makes me happy, for 12 years I worked at a company building Solar heating equipment. I also worked for a company that build ventilation systems with heat recovery, hence the other idea.
You should run the "wort cooler" in a counter-flow heat exchanger arrangement rather than parallel flow as it is now, that should cool the desiccant a few more degrees
Not to mention there's still a great spot to add another heat exchanger, running counter-flow as well. The output of the first desiccant column is cool and needs to be heated and the output of the second desiccant column is warm and needs to be cooled. Adding that would reduce the amount of solar heating needed as well as precool the desiccant before it goes into the radiator and wort cooler. Parallel flow is essentially running it backwards and he would get a good bit better performance if he fixed it.
@@AndrewMerts Absolutely, based on the lack of change in humidity in the room air we can say that evaporation is not whats cooling the room air at all, but rather being in contact with the cold desiccant fluid. Cooling the desiccant fluid as much as possible before running it through the room air loop would significantly improve the results. An interesting configuration would be to have two room air loops, one specifically for cooling the room air through evaporation of regular water, and another specifically for dehumidifying the room air using the (chilled) liquid desiccant. I think that is more like his small-scale prototype anyway?
@@EpicScandinavian I think the dehumidified air is exactly what is cooling the room; the dehummed air causes any moisture to evaporate out of the wood etc, cooling the room (did he give an aircon outlet temp?).
@@EpicScandinavian So essentially this system could be highly simplified by just using the last (swamp cooler) cooling tower, running the cooled liquid inside and inside run a fan through a radiator? Which is not the worst idea: swap out the compressor in a 'normal' airconditioner and use a swamp cooler to provide the cold. Saves on energy for the cost of some water. Or is my logic here wrong?
This is great, i'd love to see more improved versions! This could be a game changer, given how it doesnt use any freon and possibly has a lower electricity consumption than traditional ACs
Not very efficient though. I love the idea, but the heat exchange of air and liquid in a direct contact system like that is not nearly as efficient as a typical refrigeration condenser and evaporator setup.
We have this hot chic in our hood and her dad is the painter. Even more hot is the mom. We refer to her as the painters daughters mom but usually we just say M I L F
Well IT doe's What IT is set out to do!! IT can cool some degree under the air temp. but If he had burried the cooling tube in the ground .. the air temp would be even colder!!
An in-depth analysis on self-sustaining projects after doing the project is the kinda overkill measurements that always keep me up at night. Giving us the numbers, measurements, tools, and know how for this, is perhaps the most scientific/humanitarian-support a person could ask for.
That's a good result, and I think you'd see a significantly higher COP in a different environment. The paper "Performance study of a heat recovery desiccant cooling system" (Seifennasr Sabek et al 2015) gives some performance figures and demonstrates that cooling capacity has a positive correlation to input temperature and humidity. Cooling capacity about doubled between 30 and 36 degrees C. Your system is is unexceptional in your climate, but would most likely be very effective in somewhere hot and humid with the same power requirements.
Improvements: 1. condense the water of the second cooling tower and feed it as coolent into the third one. This way you get the water for free as well. 2. swap intake and outtake in the room. this way you dont suck in the cooled air again. So you allways get the hottest air from the top of the room.
Yes, improvement num 1. I was wondering why we aren't using the humidity we drive out to feed the water we need for the 3rd cooling tower. Not sure if it would help temps tho
2 seems like a good way to get a temperature gradient in the room. Heat rises. Therefore, cold air sinks. Therefore, if your cold air enters the room at waist height, the bottom of your room will get cold while the top of your room gets hot. Stick your hand in a chest freezer. (Or even a beer cooler full of ice.) There's a "wall of cold" you can feel by moving your hand in and out of the top with the lid open. Your whole room could end up like that with #2, at least in the short term. It might be better for overall efficiency, but it's worse for the time between when the cooling kicks on to when all the heat has been pumped out of the room. Depending on your thermostat situation, it might switch off before reaching that point.
I vision one incredible improvement after another. Insulating the outdoor aspects and adjusting the solar input through the glass inside are just two. Your build is so well adjusted from the earlier model and the variety of conditions that the experiment is working under would not affect accuracy in real life as it has under your scrutiny. Thank you so much, I'm looking forward to some adjustments that I might do myself. Keep doing, Kenny.
Excellent! We are building a heated shipping container and container based production unit: Living in Zambia in winter we have sunny skies and need a very warm production space. Great ideas! Some of which we are already using. Love your channel.
@@bashkillszombies There are examples of people making money out of open-source hardware designs. The 3D printing community is a good example, with companies such as Prusa or E3D. Some people don't do this stuff just for profit, but so that humanity can benefit. A system such as this, made with common parts, could be great for developing countries as it is cheaper and more environmentally-friendly than conventional AC units.
Thank you. Very interesting. When I self installed my geothermal loop, I included an heat exchanger for my solar thermal storage tank I could include in the loop during heating season. Working together it greatly improves both the efficiency of the heat pump (sourcing warmer water) and of the solar thermal panels (adding heat to relatively low inlet temperatures). It's a beautiful synergy. The marriage of heat pumps with solar should be seriously widely considered.
I want to see this optimized more. I think the previous design was more efficient because you were exploting the enthalpy of vaporization, this new version isnt because the enthalpy change of absorbtion is negative and you're pumping that heat into the dessicant as it contacts the air. When the liquid dessicant absorbs water from the air it releases heat. This still worked because the dessicant was pre-chilled, but you need to keep track of where the enthalpy change is happening to optimize the system! Don't pump the enthalpy back into the room! :P
Can you explain more? If you are talking about air getting warmer during desiccation, this system is re-cooling that warm air to WBT by indirect evaporation.
@Muhammad Usama What I mean is that the absorption of water by liquid desiccant should be an enthalpy driven process, not entropy. When water goes from the gas to liquid state, the enthalpy (stored chemical energy) change is negative, meaning that heat is released. Spontaneous processes require negative Gibbs free energy, which is 𝚫G = 𝚫H - 𝚫(TS). Here G is the gibbs free energy, H is the change in enthalpy and S is the change in entropy and T is the temperature in Kelvins. Because heat drives the desiccation in reverse, we can conclude that entropy increases when the water leaves the desiccant, otherwise the reaction wouldn't proceed in the reverse direction at high temperature. In order for the desiccation to occur at low temperatures spontaneously 𝚫H must be negative. That is to say, that thermodynamics requires that the absorption of water by the desiccant produce heat. Simply desiccating the air, cooling it to ambient temperature, and finally evaporating some cold water in a *low* pressure environment would provide the best results, I assume. (I.e. vacuuming the exit of the column instead of blowing into the entrance of the column.) I don't know if that would decrease the throughput, but it should improve the efficiency (I think?) In any case, evaporating water cools the air (𝚫H of vaporization), while desiccant absorbing water heats the desiccant (and indirectly heats the air by contact if the desiccant is hot enough). Also note that because cold water has a lower vapor pressure the efficiency drops significantly as the air gets cooler. Reducing the pressure can compensate somewhat. But the vapor pressure drops dramatically at low temperatures. zimmer.csufresno.edu/~davidz/Chem3AF97/ChW/vaporpressh2o.html As you can see, the vapor pressure of water is around half at 60C vs 80C. The vapor pressure is probably affected slightly by the salts though.
I can see how indirect humidication should cool the room, but I don't think it practically works very well for a number of reasons. Main one is that it cools it the same amount you heated the desiccant, so only the heat carried away by the desiccant is actually doing any cooling work, the rest is wasted. Also the column is high pressure instead of low pressure, so you are fighting the vapor pressure of water instead of exploiting it.
@@ryannicholl8661 Fair point. But I'm not sure if your notion of the indirect evaporator removing only the heat added due to desiccation is correct. The reason being that the indirect evaporator maintains the temperature at WBT so temperature difference is constant (DBT - WBT) and so is specific heat, the only thing affecting the cooling capacity of the evaporator is flow rate which can be increased by scaling it up. So as long as the energy removed by the evaporator is more than the energy added by desiccation, the air will get cooled, just like the bench prototype of Tech Ingredients.
In fact, scaling it up isn't even necessary, a small cooling tower with axial fans, experimentally, has enough heat removal rate to offset both the heat released during chilling of the desiccant and the heat released during re-cooling of air. I tested it experimentally.
Great demo and explanations. As others have said, tons of opportunity for even greater efficiency. For example, sink a holding tank below grade where you can store lots of cold regenerated desiccant, which can be made even colder all night long. Also lets us switch on each stage as needed: circulating conditioned air on a thermostat, regeneration when the sun shines, and cooling of desiccant whenever tank temp rises.
Maybe with some more tweaking the efficiency could be raised. Interesting system no high pressures and relatively safe components. I am a HVAC&R contractor. Would like to see it tested at or near to ASME standards
Thank you for the technical information it is really helping me learn more about everything! Also, your film or taping rather is very precise and there's no shakiness everything has good light and is in focus! Thankyou camera person!! I can't wait till you do another cool project, your technical instructing is super informative. Thank you, Thank you, Thank you!
@@TechIngredients For a second there, I thought you were an alien with a third hand showing the graphs and moving paper. Now that's a helpful cameraperson.
I'd be interested to see a follow-up, testing this same system in a situation where A/C is really needed, like >90F temps and high humidity. Just how much volume of living space can it reasonably manage? Would it make sense to set up a plenum and distribute the cooled air over a large space or just have multiple units acting more like window A/C? Idk, maybe there's another video in this series that addresses this. I'm impressed with the quality of the videos on this channel, and have subscribed.
this!, its really hard for water to cool air that is already "Cool", I bet you can get better perfomance if the air is at 40c, you might be able to drop it to 18-24c just by using a humidifier (once you desacate the air)
swamp cooler pc watercooling is absolutely a thing. Only issue with it is the noise and refilling water. I didn't have any issues with contamination or overly-humid room air either :D
@@Deaner3D just get a hose and a float for the water. set it at the desired level and boom water refilling issue solved. and well the noise i guess use ear plugs.
You may want to add a drip edge, (similar to ones that are found near rooves) within the cooling columns, this would ensure the liquid droplets are falling within the pipe, rather than running alongside the walls, while also allowing airflow. And like others have said you can extend some of the columns, double up the radiators in Ceres, and insulate insulate insulate.
Very interesting indeed although living in Pakistan I do not see a need for air cooling at 17C ambient. We use crude evaporative cooling in the dry hot weather in May and June, and I mean hot over 40C . It is extremely effective but looses efficiency with the onset of the Monsoon and the humidity shooting up in July-September . This is the period when I think a desiccant system like yours could be of a great help . I plan to experiment with a system like yours in 2025 . Thanks very much again for sharing your valuable knowledge 👍
This channel is a gem! It has a hip New England vibe, It is produced nearly professionally and ALWAYS interesting till the end. I can't praise you enough for your 'patience' in your audience. Absolutely fantastic subject matter and seemingly unlimited (local) resources. Please keep 'em comin'!
In order to bleed off as much heat as possible, digging a deep hole (or two) and taking advantage of the thermocline/"root-cellar" effect, could prove quite advantageous to certain parts of the system. Also, while this is a very, very worthwhile and cool experiment (no pun intended) one of course could achieve more effective cooling by pairing a high efficiency AC unit to some solar panels, mini-wind turbines and a bank of deep cycle/SALT water batteries and be cool as a cucumber 24/7 all summer long but I digress... it will be very interesting to see how much more efficient the DIY system in the video might achieve with some additional tinkering(?) btw, great channel... can't wait to see what's coming in future videos!
I'd say solar powered AC should be pretty effective even without anything else. Primarily because there is a very high probability that day that's exceptionally hot will also have a considerable amount of sunlight available...
Problem with the root cellar effect thing is that the surrounding soil will heat up and then you’re back to square one. See Thunderf00t’s Waterseer busted video for a detailed explanation.
@@jackdallwitz5086 - True... "eventually" the lower thremocline temperature would be overcome by the waste heat radiator temperature :( Only other (natural/free) option to bleed off waste heat would be to set the waste heat radiator into a spring fed or mountain fed, cold water stream, which of course isn't going to be very practical but it definitely would work quite well.
@@wisenber it is worth noting that a well sealed and insulated house will change internal temperature based on equalization with external temp pretty slowly. If you have a high thermal mass interior construction, this is much more so the case. A house built new these days is often required to be at least somewhat sealed and insulated to meet code. It can be a rather large hassle to accomplish this with an old house, but it is usually cost effective over the long run if enough power is input into the house climate control. It's up to the user preference about how much they control the climate.
24:53 Aww, that paper pull was kinda cute :D Im glad you get to do the stuff that apparently makes you happy and also educate people about it. Great channel :)
As I sit here watching this, while listen to my neighbors noisy AC unit on this warm summer night in the Texas desert. The one thing that really attracts me to this is how quiet it is. I'm extremely sensitive to noises/vibrations in general, always have been, and like things as nice, quiet, and as peaceful as possible. I have saved this video, and will probably try something like this when I build my own place out away from people. Thank you for taking the time to take us through the steps and processes to understand how to create a version of our own.
The newer modulating AC units are very quiet these days. Something like this won't work well in a humid environment like Texas unless you're in the desert of west Texas
I am building one of these, except I am using attached 5x 5 gallon bucket stacks for the evaporator stacks, and I used copper tubing for the solar heater.
This is so marvelous. Thanks for this video. You've presented a design for a two-stage swamp cooler that separates the "swamp" from the "cool", which is pretty cool, indeed. One thing I would like to try is using a liquid-to-air heat exchanger (radiator, basically) in the *cools-the-room-air tube* (sorry, don't know what to call it) to keep the desiccant sealed so it doesn't need dehumidifying. Dehumidification of room air will still occur (though probably not as efficiently) by way of condensation on this radiator, which will need to be drained off. It may not be as efficient, but it would simplify the process by eliminating the solar collector and by possibly allowing common water to be used in the coolant loop since it would then be in a closed loop.
Make a video on Optimizing this system. More insulation, better fans, larger swamp coolers!. see how good this could be. Also run it, use it and see how it does long term . Great job!
I would like to see what happens if you pull the air out of the room from the top where it is hottest and then push it in via the lower pipe, in doing so stacking the cold air at the bottom and pushing the hot air out
I agree. The inlet and outlet should also be separated as far apart as possible, they are so close together, it's just pulling the cool air right back out of the room.
@Jamesy Garfield Most of the energy from the sun is non-infrared, while most of the energy the pipes give off will be infrared. Blocking infrared traps most of the incoming energy while blocking most of the outgoing energy. If you wanted to get stupid you could pressurize the heater with CO2 to make it trap even more energy :P
@@specialagentdustyponcho1065 a quick google says infrared energy of sunlight at the earth's surface is 52-55% - it's possibly not most but it's more than half.
This is the best DIY project Ive seen in TH-cam and will have an impact in our environment this can lower our electric bill (one of the highest in the World yes only in the Philippines), Save the environment (No Freon), Inspire young inventors..Thank you so much!
The problem is, these kind of systems don't work well in extremely humid conditions, because the air is already saturated, meaning it can't absorb much (if any) moisture from the air. And "extremely humid" is the only kind of weather the Philippines has.
@@Garryck-1 i just posted about that too lol. This is ok for your dry climates that involve needing humidifiers but in florida our humidity is insanely high.
It would be interesting to see how this system performs if it is enclosed in an insulated structure separate from the structure being cooled. Maybe even power the pumps and fans with solar power? I know nothing about solar panels but I assume it would be possible to use them as the power source on sunny days.
I love this sort of stuff! That water heater coil is genius. I wonder if you could connect several of those in series and get the water even hotter. Maybe even hot enough to kill off bacteria if the water was coming from a stream on your property for instance?
*Nice invention.* The piezo fog elements are even more effective to create cool mist inside of the tube. Keep optimizing this cooler, it will help us all to stay cool :-)
Actually, I think that would not be a good idea. Those piezo foggers actually use quite a lot of energy, and they don't necessarily produce "cool" mist because the energy they use can end up transferring to the mist. Plus, using them in a high salt brine instead of pure water can supposedly reduce their operational life expectancy. Not to mention that a fine mist will be too light to fall downwards against the up draft.
Amazing videos! I think a small improvement could be to switch the direction of either of the fluids in the wort chiller, so that they flow in opposite directions, to get a countercurrent heat exchange, so that the fluids will swap temperatures with each other (ideally), instead of, as of now with a cocurrent exchange, just reaching the mean temperature.
Geothermal cooling-heating is gaining interest among the offgrid community. An a lot simpler tech that can make your house more comfortable without using much electricity, specially with the subterranean pipe with vents and small fans pulling air inside the house system. Convection is another part of the system, so you must open high windows/vents for hot air to escape and create draft, helping the system function more passively. Has nothing to do with this video but I figured some people watching this video might be interested.
as a chemical engineering fresh grad, i find this really exciting. it's basically chemical engineering in action with all the column design, heats of vaporization and solution, fluid flow, psychrometric charts. oh boyyy!
I would love to see this continued and updated. A little more though on the system might improve it and as frosting on the cake it could be electrically powered with photovoltaics. Really enjoy your channel!
@@aaronx2724 same man it was the worst looking at something a feeling like you hadn't even covered anything related to what was covered in class. I barely made a B, I thought for sure I was making a C
I was gonna say just that. It's 17C outside. Just open the window if you want to cool that shed. Honestly 17C is the temperature I start heating my home (I'm used to warm weather since it never drops below freezing here)
Tyler Hardy the effectiveness of the swamp cooler will tank when humidity rises. This sort of system would work better in the desert, except water is so expensive to use like that.
@@davidc1961utube no, no it's not. Water is not expensive, I live in Arizona. You could put new water in it every day and not even come close to a window until in cost.
Great video, a wet and dry bulb reading of air entering and air leaving the system to calculate the grand total heat removed would have been more accurate. You measured sensible heat removed entering and leaving but used your initial water content of the air to calculate latent heat removed and capacity which was measured hours earlier and with different ambient conditions. Not a true measure of capacity but shows it works I suppose. As I commented on your last video, need wet bulb and dry bulb of entering and leaving to accurately measure grand total heat removed. Sorry to write such a long whingy comment but this is very interesting, you go very deep into the maths of it and are very exacting but don’t quite get an accurate reading of the process. Love the videos! They inspire me.
I have to say, ideas for that kind of appliances (especially because DIY-doable) is what makes youtube and such channels interesting. I salute you sir. I love DIY but I would have never thought of an AC (I have 5 typical commercial devices, one per room in my house). Should I ever build a house from scratch, now I have an idea how to do a all-rooms integrated AC based on that. Thanks a lot for sharing and keep the ideas coming.
You really need to get sponsorships for your videos. I can't believe there are no tool manufacturers or whatever engineering company that wants to advertise on your channel.
I'm impressed, by redesigning the cooling system you resolved the bacterial issue and introduced the feature of air purification. Do you opensource your system? Are blueprints available? Thanks for your video!
honestly, once you know exactly what the desiccant is... This video is all you need. (I'm not sure he said it here, probably in the previous, but it is somewhere for sure)
@@Verrisin I think at the beginning of the video, he mentions Calcium Chloride, but on my experience Calcium Chloride emits HEAT when in contact with water
Honestly, I don't understand why people that are not involved on the build or the design of this device are answering a question that is not directed to them ¯\_(ツ)_/¯
I have it on good authority that flat black paints are often not “flat black” in the infrared, but are fairly highly reflective. In order to get a paint that’s not highly IR reflective, one should use one of the very high temperature tolerant flat black paints, such as those used for automotive headers or BBQ grills. I don’t know if it makes any difference in your solar collector but it seems it might and it might be handy to keep in mind for other projects. Amazing videos, thanks.
Love this guys intellect & his amazing ability to explain all of of his ideas.. This system is clever but quite complicated. It shows how amazingly simple a window air conditioner is, hence why it is in production to this day.
I can respect his conclusion saying the system can compete, not blow away the current air conditioners, that is being honest, I enjoy hearing the physics side, if our lecture could tickle our interest with projects like this uni would be a bit more fun, but South Africa has only so much to offer. Thanx for the share, this is very interesting.
Technocracy does not work and has always only ever resulted in disaster, starvation, and mass graves. I'd rather we all run our own lives, and this gentleman run a business from which I can buy his creations.
5 ปีที่แล้ว +13
@@nERVEcenter117 Yet you can't actually cite any examples.
@@kebab4387 he's not using power cells, he's using a solar heater. That thing will work better the hotter it gets. Not sure if that would make the whole machine operate better tho
@@kebab4387 super hot weather here in Arizona may lose a small percentage of efficiency but I bet with the more sun hours a day here compared to other places like lets say the Pacific Northwest it will charge a battery faster and thus more efficient.
Yeah, No Doubt, all that complication for 3 deg F and its only 64 out side? Thats basically just a box fan in a window. Bring it to the Actual places its needed where the temps are 90+ and humidity is 80% year round and see how it performs..
Now that it's summer again, would you please consider doing this again during higher temperatures, and blocking the windows to keep the sun from heating the room? I'd love to see measurements on how this performs in higher temperatures and higher humidity levels.
I'm curious too as to how viable this would be during the Summer. Texas heat killed my AC units so an alternative would be nice to explore, even just to mess around with if the AC units are repaired/replaced
I'd say there is a reason why this video was taken at 17,5°C ambient outside, that's the moment where I need an AC most! unfortunately most of his videos are full of incorrect measurement, nice calculations but the moment he wants to prove those using measurement, the whole house of cards collapses...
This is awesome, I did a similar project years ago, but using a copper pipe into the ground and having a small mesh in between I think it's called geothermal energy or something like that, if reduced the heat and captured moisture, I got that as a mistake, my original idea was to suck water out of the air so my chicken had constant water since I didn't have a water source near by, noticed it cooled their chicken coop when I didn't see them outside playing and instead chose to stay inside. Anyway, I powered the motors that sucked the air out with harbor freight solar panels. It eventually broke cause I neglected it but this made me want to do something similar using some of the applications here. Thank you for inspiring me to get back to it.
My compliments to the "son of the MP" who shoots all the video and probably has to edit it as well. Silently taking one for the team with things like gently moving the graphs into the sun for a better camera shot, always listening to the MP's words, and moving the camera to show what's currently being discussed with no fuss etc.. Most people never notice things like that, and he deserves some props, because it allows people to follow the MP without being distracted by a bad cameraman.
hard not to notice - distracting
try multiple cameras with cuts, or cropping from a 4k source in the edit
Job accomplished as is; but since you bring it up, there are smoother ways to do it
Your videos could be better if the cameraman avoided viewing angles that caused the digital meters to be unreadable due to light reflections. Some type of stabilized hand mount would also be a plus, and intentional pans and tilts should be slower.
Hear, hear!!
The extemporaneous lecturing might be more accessible if some scripting were involved. For some of this (and the original video), I felt I was trying to drink a firehose of knowledge with gardenhose training.
What is an MP?
It always amazes me how much technical material he covers without editing. It's like he just turns the camera on and off he goes
It amazed me how UN-technical this video is
It amazes me how easy these things are telled … some scientific terms are necessary in my opinion, but it’s faster and more lasting than nearly any lecturer at my university… love every video
@@Victor-tl4dk if you need simpler language then you need to study more.
i thought he explained things well in an easily understandable way.
dumbing it down to "Man do science things and make cold air"
"I put tube thing here and things move inside making air cold"
it just makes it harder for everyone to understand what he's doing scientifically. that's why people use specific terms to make it more understandable. its not to confuse people.
@@darkshadowsx5949 sweet answer!
It's - Learn more, Not - Teach less
@casey \.experience./
It would be awesome to see a updated prototype after 3 years to see if you had any ideas on increases in efficiency, especially combined with your solar setup and the stay cool paint.
And thanks again for all the content, its always extremely inspiring.
what about an update in september 2024?
You built an air cycle machine! When I was in the Air Force, I was an AGE mechanic and we had a unit that cooled air down so much it was frosty at the end of the duct. It was the -10 air cycle machine and it took heated (215 F) compressed air from the -60 start cart/generator/air compressor and turned it into frosty forced dry air (-10 F at the duct end), using nothing but dehydrators, heat sinks and speeding up the compressed air via Venturi restrictions.
I always wondered why there was no civilian equivalent but then I figured nobody has a jet powered air compressor to feed the machine compressed air. But you found a way to do it without compressing the air! Lovely!
I heard a serviceman say something about this more years ago than I care to admit, but when I tried to find information on it years later, I couldn't find anyone who had hear anything about it. You sir, have just made my day as now I have another source mentioning this and now know I wasn't imagining it. Thank you for this and thank you for your service.
@@dsherman9438 Glad I could help.
@@dsherman9438 The wikipedia name for it is "vortex tube", if I'm properly understanding what you are describing.
As someone who has been in the HVAC industry for 30 years and has tested commercial equipment in a psychrometric chamber I appreciate your creativity. I followed along and your system air flow is about 250 CFM and produces about 2000 BTU/Hr of sensible heat 0 BTU/Hr of latent heat at an EER of 11.7. Interesting concept using liquid desiccant! Great video!
so considering what you have just tested, is it suitable for homes?
@@MrSpock-sm3dd Maybe in dry climates as it uses the evaporative cooling effect, but a “swap cooler” is much simpler than his design.
It’s easy for those of us with decades of experience in commercial AC systems to point out all the flaws or say “this has been done before.” What kept me interested through both videos is the use of a liquid desiccant (which I didn’t know existed!). The efficiencies can be improved significantly in all steps if the process as many have pointed out. This is a proof of concept and it is very interesting! I appreciate the honest data at the end.
Shure. I'm aware of some of these flaws as well. But you're right, the main point is the application of liquid dessicant.
A prototype is seldom given no changes in the evolution to type1 and the observation of this fact is even less obvious to most of the population. There is a reason the FULL AUTO 40mm grenade launcher is called an MK19.
SEPARATE
Do you see a way to use the liquid desiccant to improve the effectiveness of the external coil in a traditional heat pomp in cooling mode.
I can't stop watching this bloke, Wish he was a teacher at my school when I was younger
for real haha. I got kicked out of physical science class often and didn't hand in projects. yet somehow this is one of my favorite channels on youtube. I think a lot of teachers just have no passion to share with the students. to them it's just a job and a paycheck.
@@chrishayes5755 That's usually not the issue, but rather the rigidity of modern education wears teachers down with frustration, along with the unreasonable kids and unreasonable parents. The unreasonable camp has been given a voice now, they make teachers miserable and there is nothing teachers can do about it. So hard to understand until you become a teacher.
What classes would he teach at your school. 'Shop' is naturally one of them at my small school but he would also be effective teaching 'Maths for Engineers' including 'Geometry and Calculus for C students' . He is so Cool he could teach 'American History for Stoners'.
OK, Your turn
He is my teacher today. I am in attendance.
You have to have been younger, in order to be younger - *OLD BAG* ( extremely monstrous on the old part )
I'm an engineering student, currently drawing plans for a house and workshop I'd very much like to build in my lifetime.
This channel, more than any other informs so many of my structural and hvac designs..
Simply amazing, I could watch this channel every minute of every day - even 10 runs through the same video I'll learn some little thing, something less considered.
Youre responsible for so many redraws of my designs and I love you for it ❤
Never change.
lies
4:06 "...human being shower head" - further reinforcing my theory he's an extraterrestrial being attempting to gently educate humanity.
Delete this.
I'm dying rn 😂 you caught him !!
This guy really is alien or has smoked alot of weed to come up with this its wack but really cool
Area 51
Lol my first thought was what a nerd
The neighborhood is concerned with the 15' bong im installing on my house
@Russell Barnes I actually have those, I give them away for free. The cookies are $10 a bag.
I'm set to retire in one year !
This comment is so underrated LOL.
@@smalltimer4370 ......and you'll remain that way., A small timer
They're concerned ur not going to invite them over to hit that shit
@Lord Colin I was going to say.... ;-)
as a pipe and duct routing engineer, i have some tips!
1 insulate the duct that go in and out of the house.
you could use insulated spiro ducts with silencers and plenums so you have a more quiet system and also less leaked heat from outside.
2 make the swampcooler bigger and 2 stage it to reach even lower temps for the coolant for the exchanger.
3 stack the radiator in series on the bigger swampcoolers. saves on the 2 radiator fans.
i think you are getting close, it needs some balancing
darkevilapie, all sounds very good (except the high cost of insulated spiral ductwork-I expect everyone interested in this project would insulate the ductwork with insulation bats)
@@seanflanagan5674 insulated flex duct is not expensive
Other than noise, is there any reason not to locate the primary cooling column inside the space being cooled? Skip the insulation all together?
What I want to see is to put the whole thing under a roof to block off solar radiation, and put the solar waterheater on top of that roof to save some space, and if possible, show us how to run the thing at night when there is no sun as heater, etc, so many ideas...
@@4IN14094 To run at night, maybe fill a tank with hot dry desiccant during the day. Then run the desiccant through the swamp cooler and adsorption room cooler and into another tank during the night. Wonder if the tank volumes would be practical.
You know years later I realized that what you built is essentially an industrial open loop absorbtion cycle refrigeration system. Or water loop refrigeration. Which now I want to build a bunch to experiment with various compounds. And test their performance. Great videos by the way.
cool
Spoiler alert, Ammonia is about the best without getting super over the top with the system design.. its why industrial refridge systems use it, also "3 way fridges" you find in caravans and I believe some marine fridges.
does it work?
Would be interesting to see a short update with your longer term performance, once you optimize the operation of your columns, pumps and fans. A former Chemical Engineer, but really like seeing practical uses for that around the home. Good work & Good Luck!
Once a Chem E, always a Chem E. There is no former.
Cute saturnic profile pic.
This dude is GOLD. Either he doesn't know how cool he really us or he's just super nonchalant
Empirical evidence would point to the latter being true.
Soon you'll see this packaged and it will have the name Tesla on it
Pretty sure with a thermometer he knows exactly how cool he is
@@josephwilliams1915 thanks! I that joke, I admire it and wish I’d thunk it first. Sub’d & Bell’d
Hah! 1.5 million views
As an undergraduate Mechanical Engineer I find your videos awe inspiring. Some people may look at this venture and put it down to a persons desire to make money from youtube, however like many other people i feel like you are doing this for a greater good. I see that you have decided to make your life about educating strangers to the wonders of science, math and the universe. I sense that you are a man of gifting, and for that i must say as a complete stranger i deeply respect you. God speed Sir, keep it up.
Thanks and you are correct. It would be far easier to generate views and money with visually impressive, but poorly explained and demonstrated projects.
@@TechIngredients Was this system designed with any knowledge of Ammonia systems in mind or was it an independent idea. If not, what was the reasoning for chosing CaCl instead?
If you're using solar panels to run the fans and pumps and then put cooling coils on the back of the photovoltaic panels, you could cool the panels and make them more efficient while heating your desiccant. Love watching your videos.
At what loss though? Also I think the two cool columns should be indoors and the hot column outdoors.
@@bashkillszombies the desiccant needs to be heated anyways and PV modules gain a lot of efficiency when being cooled down so it's a win-win
@@grrkaa8450 „a lot of efficiency“ you are talking about single digit percentages of efficiency gains here mate! I studied Solar cells for many years, so while you are right the thermic expansion in both ways when you are stealing their heat could then lead to cracks in the substrate or interconnections, shortening the lifespan of the solar cell. Don‘t forget that when thinking about heating and cooling, it‘ll always lead to expansion and shrinkage of materials present…
@@Elektrotechniker there have been experiments proving you wrong mr student
@@bashkillszombies Why not underground chambers? If properly engineered it would remain a lot cooler than simply indoors
"Kinda a fun project; a neat way to spend an afternoon.". He was already making me feel like I am wasting my life.
I think he wasted his time with this project.
It took that thing hours to cool a room 2 degrees.
More like two weeks. I suspect he has several cats in the fire at once. I myself can never do just one project at a time. My projects feed each other and amplify my productivity and inspiration.
You're not alone
this was really well made and concise.I was looking for the typical fudging of numbers to make it better than it is supposed to be and the ensuing tall claims,but you surprised me by your rigor of the scientific method and complete honesty at the conclusion, thanks for taking the time to document all this and hope you have great day
Thanks, you're seeing that fact is the support we need.
@@TechIngredients ever looked at a vortex tube.??.a big one,with minus temps,run on lpg compressor. just spin it round from winter to summer..free ish heat/cool,with no a/c gas .mine works in hot ,like 40c conditions,yours would heat up if not fully insulated.indoors.temp doesnt effect pressure as much,.like a steam train will go higher than a diesel train. we are kept dumb & paying for services..
@@phantomwalker8251 - vortex tubes are on the opposite end of the efficiency scale.
I love this channel. I love the nitty gritty granularity. I love the engineering mindset. Keep it up, you guys. It's awesome!
Ye, love the way he focuses on the details!
Back in early Mesopotamia....... Zzzz
Classiest channel on the 'net!
Engineering mindset is a different channel
@@AliShaikh1 I wasn't talking about the channel "The Engineering Mindset".
Nobody will watch this channel with me because it is so technical, but don't ever change it. Do I understand each nuance or formula; No. But I know where to come to re-examine it later. I love the presentation, the cooperation and effort it takes to produce it, and the information it provides.
Thanks!
I wonder how much more efficient and compact this could be made through the mechanical design. For example, coaxial fans and coaxial pumps to reduce the number of motors, using spray jets instead of shower heads and having the wort chiller replaced with a submerged radiator in the bottom of the third column.
Liquid to liquid heat exchangers are not that difficult to make.
This sounds like a great candidate for an update next year!
Nice job! You are getting there! Suggestions: insulate the ducts. Flip the wye fitting for better air flow and Design a way that the water doesn’t get in the fan. The pressure drop of the air flow thru the wye fitting as you have it it huge. It is decreasing the flow making that turn. Redesign that part. Atomized nozzles are available for the spray heads. Take a look at a Kathabar system. Works on same principle. I have their design manual used for clean rooms. Next, use a psychometric chart instead of the engineering toolbox graph. You can obtain sensible and latent heat energy, vapor pressure, all properties of moist air. Use a wet bulb and dry bulb thermometer for more accurate results. Humidity meters unless very expensive ones aren’t very accurate. Kathabar design manual would be a huge help for you. They sale every piece of these systems for large industrial scale projects for liquid Desiccant. Check it out. No matter how you slice it, it’s gonna take a lot of energy to remove the heat energy from a space. I feel water source heat pump is still a great way to go. Keep up good work.
What a beautiful mind sharing his knowledge with the whole world. I am a Structural Engineer, but this gentle man has made me to look into building serviices. Thank you for widening my understanding of air conditioning.
Interesting concept. Few things that should be noted.
1. You should insulate your thin refrigeration lines. Low volume to surface area ratio on your lines means you likely are losing notable amounts of efficiency there.
2. You could get more evaporation if your radiator was at the bottom of your swamp cooler to heat the water you are evaporating with the fan. Minimizing the energy difference needed for evaporation = more evaporation caused by your fan. More heat causing evaporation means you'll have more cooling potential. Adding more heat here even through electrical power would be the quickest way to get more cooling.
3. As others have mentioned having IR reflecting glass likely is making your desiccant not absorb as much heat as possible. Normal glass would likely be better as it would stop losses due to hot air radiating away which is the main way to build up heat. Possibly could use aluminum/mirrors to focus more heat on it also like a solar oven, but you could just scale this up for the same effect.
3. Most commercial desiccant cooling systems use either use desiccant that is regenerated through compressor heat as you've mentioned. The main reason is a closed compressor system is not effected by outside humidity. A swamp cooler becomes near useless in high humidity environments. Wonder if just focusing on more solar heat & using an expansion valve for your desiccant solution would give you better performance that didn't care about the humidity.
would using a compressor negate one of the big upsides though which would be silent operating volume? in a lot of commercial applications the noise is quite a big factor to take in to consideration even if the unit is mounted outside.
@@grandeur7420 Compressor would likely make noise but the main use of dessicant air conditioners traditionally is in hot humid climates or indoor/greenhouse grows. In both operations you want to cool and remove humidity. Dessicant air conditioners exist in the industrial space and watching the shortcomings of this design drives home the reason companies have went with theirs imo.
Swamp coolers will still have fan noise. So I don't think your noise level would be significantly higher with a normal air conditioner than this to be honest.
In regards to the compressor, I guess it depends on what your goal with the design is. If you're trying to achieve maximum efficiency in a device/system that would be manufactured in a plant, then yes I agree. However, if you're trying to design a DIY instruction set that a layman can put together with extremely easily sourced parts which will give manufactured systems a run for their money, then I disagree. I think one of the attractions of this system is this DIY aspect. Everything in the design so far is easy-peasy, no special tools required. There are plenty of children (thinking high school) who could safely build the system in this video. Add a compressor and the same cannot be said, however again it depends on your goal. Thumbs up anyways, good points overall.
My dad was a director of a company called GEA Grenco Refrigeration and I worked there for him and we was working on a similar system to this to possibly be used on cruise ships.
Obviously much larger but the principle and set up was very similar.
Sadly my dad passed in 2002 so it was never brought to fruition but I have many many fond memories of our time together.
mavoc1211 - Sorry for your loss. Do you have his plans? Maybe you could collaborate with someone?
Plenty of cool salt water there and no need to use old warmed water either. And plenty of
heat free otherwise being exhausted from clothes dryers, kitchens, engine room heat and likely many other sources. Thanks for sharing that.
Can you share the plans with us online for some opensource engineering on this idea?
Rick Fischer absolutely they need to be put into digital form or scanned in which I can arrange.
I am sure my brother still has them somewhere as he cleared my mums property after she passed away in 2016 I’ll keep you posted.
@@mavos1211 I really hope you can get in touch with Tech Ingredients with these plans. I'd love to see a video on them!
Thanks for measuring the power at AC! I think on the lab bench you measured only DC power coming from adjustable power supplies. Measuring at AC includes inefficiencies of AC->DC conversion. Bravo!
There's nothing stopping someone from just putting a solar electric panel on the roof to negate that cost.
Just now finding these videos. I must say, the most impressive skill this man possesses is the ability to explain everything without a prompter, in an understandable manner, probably even without a script. Plus an awesome capacity to make calculations on the fly. And as PappyMan says, a top-notch cameraman.
17:45 Flow velocity in the center of the duct will be up to 2x higher than the average velocity throughout all of the cross-section (as it is used in for the calculation). This should be accounted for when calculating the performance of the system.
Thank you for all the detailed and simple explanations in your videos!
In my experience as an air balance tech i didn't find that differential.
I think it needs a correction factor applied, perhaps around minus 10-15%.
@@ZipZoomZip yes i see what you are saying. If i just took a center point reading i would use a correction factor of .90. But i never experienced 2X the flow in the center of the duct. I usually took a series of readings on larger ducts but a small round its not that critical.
@3:55 ... A common shower head, a human being shower head.
You sir are not common. You’re exceptional. You’d never use a shower head like that.
does he mean its made from humans? a soylent shower head
Naw, he's just clarifying as he's not human, and we shouldn't use his type of shower head
This is very demonstrative of how well he's used to explaining things in a fool-proof manner - it is far better to assume the audience knows nothing and over explain than to skip something that is "self evident" and confuse a portion of the audience.
That's also a 6" PVC Wye for human plumbing.
@@kinnikunky - Hahaha
Get a Bete nozzle and atomize the spray for efficiency boost I bet! Chemical engineer who specializes in scrubber tech
You could also use column packing as well
What about putting the fan inside the column. The drops hit the fan and spray everywhere! Use fan tips that direct drops back up a little.
He talked about column packing and how it reduced air flow around 9:00
Mike Noce If the droplets are too small then wouldn’t their ability to absorb water be reduced? Is there an optimal drop size?
@@lohphat , I think smaller is better as long as the water volume is the same...unless they are so small they are lifted out by the air, or are wasting energy to make them so small that they can't absorb more heat by being smaller.
@Mike Noce, what pressure would a Bete nozzle require?
Coming from a HVAC mechanic, this is a cool concept! Insulating the flow tubing after the heat exchangers to minimise temperature loss might be a good idea in higher ambient days. But a 3-4k supply/return temperature difference is pretty low, will definitely struggle to bring room temp down with extra heat load.
So this isn’t effective?
hear me out, what if we build a parabolic mirror with an old antenna and a bit of mylar and build a solar tracking device to reflect 1000w/m2 to that box. That would be a hell of a temp. difference
You can also reduce water pump wattage, if, instead of just "clamping-off flow", you use a valve to direct unused water flow/pressure, back to the pump. It removes the "stress" of pressure on the pump and you can tune the "flow" to your desired need.
wish i knew what you were saying.
@@josemilian4167 me too lmao
@@josemilian4167 Imagine the pump's supply line splits into a "T". One side of the "T" goes to it's normal "supply" destination, the other side flows right back around into the pump's inlet, creating a loop with itself. Now we can start to tune the system by closing one side of the "T" or the other. If the "supply" side of the "T" is receiving too much flow, we can clamp the line slightly and the excess pressure will be re-directed into the unrestricted "loop". If the "supply" side of the "T" is receiving too little flow we can clamp the "loop" side slightly and more flow will be directed into the unrestricted "supply" side.
The important thing to note is that there is always an unrestricted line for the pump to push water through. The pump will be moving more water volume, but be straining less in the process, saving electricity.
@@nilmemory7619 In common centrifugal pumps, this happens inside the pump. When the valve is closed, water will rotate inside the pump impeller without going anywhere. You can see that the power required to operate the water pump goes down as the valve is closed. When the valve is opened again, the power used goes up as the water starts to flow again.
Then there are piston pumps, that behaves in totally opposite manner. Selecting the correct type of water pump is always critical.
@@nilmemory7619 ... and prolonging the life of the pump
Greetings from Germany.
Your first video inspired me to build a setup on my own based on your idea.
I came across the same problems.
I also change the diameter from DN 110 to DN 160. For the Bioballs I used another approach. To prevent them from forming a dense cluster I separated them in layers, 5 40mm balls in a layer, the layers divided by a stainless steel net.
I also noticed that when I turned off the water pump in the the swamp cooler the air temperature drops even further (of course just for a moment because no water means no evaporation), so there can be too much water. In the next test I want to try out either reducing the flow or switching the pump in intervals. Unfortunately the summer is over and I have to wait till next year for further testing.
The test setup I am building is a simplified version of the one you where showing in the first video. To separate the cold from the wet in the exhaust air from the swamp cooler I am going to use an air to air heat exchanger (non enthalpy one).
As I said before unfortunately the summer is over and I can´t test the setup anymore but the good thing is the whole system is modular. So I can use the heat exchanger I already bought to build a ventilation system with heat recovery for the winter.
Whilst I was looking up air to air heat exchangers I saw some nice DIY ones made from PVC plumbing pipe and oversized drinking straws. Which would made them cheap, non enthalpy and corrosive resistant.
The small solar heater makes me happy, for 12 years I worked at a company building Solar heating equipment.
I also worked for a company that build ventilation systems with heat recovery, hence the other idea.
You should run the "wort cooler" in a counter-flow heat exchanger arrangement rather than parallel flow as it is now, that should cool the desiccant a few more degrees
Not to mention there's still a great spot to add another heat exchanger, running counter-flow as well. The output of the first desiccant column is cool and needs to be heated and the output of the second desiccant column is warm and needs to be cooled. Adding that would reduce the amount of solar heating needed as well as precool the desiccant before it goes into the radiator and wort cooler. Parallel flow is essentially running it backwards and he would get a good bit better performance if he fixed it.
My thought exactly - maximizes the temperature difference (and heat transfer) between the fluids at every point of the pipe.
@@AndrewMerts Absolutely, based on the lack of change in humidity in the room air we can say that evaporation is not whats cooling the room air at all, but rather being in contact with the cold desiccant fluid. Cooling the desiccant fluid as much as possible before running it through the room air loop would significantly improve the results.
An interesting configuration would be to have two room air loops, one specifically for cooling the room air through evaporation of regular water, and another specifically for dehumidifying the room air using the (chilled) liquid desiccant. I think that is more like his small-scale prototype anyway?
@@EpicScandinavian I think the dehumidified air is exactly what is cooling the room; the dehummed air causes any moisture to evaporate out of the wood etc, cooling the room (did he give an aircon outlet temp?).
@@EpicScandinavian So essentially this system could be highly simplified by just using the last (swamp cooler) cooling tower, running the cooled liquid inside and inside run a fan through a radiator?
Which is not the worst idea: swap out the compressor in a 'normal' airconditioner and use a swamp cooler to provide the cold. Saves on energy for the cost of some water.
Or is my logic here wrong?
This is great, i'd love to see more improved versions! This could be a game changer, given how it doesnt use any freon and possibly has a lower electricity consumption than traditional ACs
I can see it now, Open source desiccant air conditioner.
Phil M it would be great for a sailboat using the ocean water as the radiator.
@@dhejdkdkdebjejdjdjs3523 I had the same thought!🙂
@@dhejdkdkdebjejdjdjs3523 My thoughts exactly...even as a dehumidifier!!!
Would be interesting to see if the dessicant regeneration and swamp cooler columns could support the addition of one or more cooling/drying columns
Not very efficient though. I love the idea, but the heat exchange of air and liquid in a direct contact system like that is not nearly as efficient as a typical refrigeration condenser and evaporator setup.
LOL - "Main Presenter". I still remember that video "Hi, I'm the son of the Main Presenter."
Main Video Presenter would be great.
He's the father of the son of the main presenter
We have this hot chic in our hood and her dad is the painter. Even more hot is the mom. We refer to her as the painters daughters mom but usually we just say M I L F
What video was that?
@@AliShaikh1 th-cam.com/video/BICLdSN4SDA/w-d-xo.html
I love his honesty, "It is not as good as I hoped but it was fun to make."
Well IT doe's What IT is set out to do!! IT can cool some degree under the air temp. but
If he had burried the cooling tube in the ground .. the air temp would be even colder!!
@earthly firefly5 He was brilliant, and a complete asshole. Not someone I would hold in high regard.
He's heavy science, thus can't lie. Only report findings.
An in-depth analysis on self-sustaining projects after doing the project is the kinda overkill measurements that always keep me up at night. Giving us the numbers, measurements, tools, and know how for this, is perhaps the most scientific/humanitarian-support a person could ask for.
That's a good result, and I think you'd see a significantly higher COP in a different environment. The paper "Performance study of a heat recovery desiccant
cooling system" (Seifennasr Sabek et al 2015) gives some performance figures and demonstrates that cooling capacity has a positive correlation to input temperature and humidity. Cooling capacity about doubled between 30 and 36 degrees C. Your system is is unexceptional in your climate, but would most likely be very effective in somewhere hot and humid with the same power requirements.
Improvements:
1. condense the water of the second cooling tower and feed it as coolent into the third one. This way you get the water for free as well.
2. swap intake and outtake in the room. this way you dont suck in the cooled air again. So you allways get the hottest air from the top of the room.
Yes, improvement num 1. I was wondering why we aren't using the humidity we drive out to feed the water we need for the 3rd cooling tower. Not sure if it would help temps tho
2 seems like a good way to get a temperature gradient in the room. Heat rises. Therefore, cold air sinks. Therefore, if your cold air enters the room at waist height, the bottom of your room will get cold while the top of your room gets hot. Stick your hand in a chest freezer. (Or even a beer cooler full of ice.) There's a "wall of cold" you can feel by moving your hand in and out of the top with the lid open. Your whole room could end up like that with #2, at least in the short term. It might be better for overall efficiency, but it's worse for the time between when the cooling kicks on to when all the heat has been pumped out of the room. Depending on your thermostat situation, it might switch off before reaching that point.
It's just a temporary set up. If this were scaled up it would be ducted throughout the building.
@Warp Zone, do you sit on the roof? Or, when sitting, are you, say, waist level?
Have both at the same high level. When you blow cold air on top of a room it helps to spread out efficiently.
I vision one incredible improvement after another. Insulating the outdoor aspects and adjusting the solar input through the glass inside are just two. Your build is so well adjusted from the earlier model and the variety of conditions that the experiment is working under would not affect accuracy in real life as it has under your scrutiny. Thank you so much, I'm looking forward to some adjustments that I might do myself. Keep doing, Kenny.
Excellent! We are building a heated shipping container and container based production unit:
Living in Zambia in winter we have sunny skies and need a very warm production space.
Great ideas! Some of which we are already using.
Love your channel.
Those look like 25w magnetic drive wort pumps, plus a counterflow chiller... Looks like we can expect a beer brewing video sometime.
He made Scotch what do you need?
They brew.
This topic is very top of mind living in Arizona. Thank you for publishing your findings at no cost online. Keep up the good work.
If you waste money on this and you've graduated from a Western school, you deserve learning the lesson in thermodynamics that you already failed.
This would be really neat as an open source hardware project. You guys should put the plans and schematics on github and let the community contribute.
Some people want to get paid for their work and inventions and actually make a living. Not everyone lives with their mother.
@@bashkillszombies There are examples of people making money out of open-source hardware designs. The 3D printing community is a good example, with companies such as Prusa or E3D.
Some people don't do this stuff just for profit, but so that humanity can benefit.
A system such as this, made with common parts, could be great for developing countries as it is cheaper and more environmentally-friendly than conventional AC units.
Fascinating idea. I feel like the efficiency of the system could be raised quite a bit by adding insulation to the tubing and/or by shading system.
Thank you. Very interesting. When I self installed my geothermal loop, I included an heat exchanger for my solar thermal storage tank I could include in the loop during heating season. Working together it greatly improves both the efficiency of the heat pump (sourcing warmer water) and of the solar thermal panels (adding heat to relatively low inlet temperatures). It's a beautiful synergy. The marriage of heat pumps with solar should be seriously widely considered.
It's all about energy conversion and conservation. Waste heat is useless. The more you can take advantage of it, every last joule...
I want to see this optimized more.
I think the previous design was more efficient because you were exploting the enthalpy of vaporization, this new version isnt because the enthalpy change of absorbtion is negative and you're pumping that heat into the dessicant as it contacts the air.
When the liquid dessicant absorbs water from the air it releases heat. This still worked because the dessicant was pre-chilled, but you need to keep track of where the enthalpy change is happening to optimize the system! Don't pump the enthalpy back into the room! :P
Can you explain more? If you are talking about air getting warmer during desiccation, this system is re-cooling that warm air to WBT by indirect evaporation.
@Muhammad Usama
What I mean is that the absorption of water by liquid desiccant should be an enthalpy driven process, not entropy. When water goes from the gas to liquid state, the enthalpy (stored chemical energy) change is negative, meaning that heat is released. Spontaneous processes require negative Gibbs free energy, which is 𝚫G = 𝚫H - 𝚫(TS). Here G is the gibbs free energy, H is the change in enthalpy and S is the change in entropy and T is the temperature in Kelvins. Because heat drives the desiccation in reverse, we can conclude that entropy increases when the water leaves the desiccant, otherwise the reaction wouldn't proceed in the reverse direction at high temperature. In order for the desiccation to occur at low temperatures spontaneously 𝚫H must be negative. That is to say, that thermodynamics requires that the absorption of water by the desiccant produce heat.
Simply desiccating the air, cooling it to ambient temperature, and finally evaporating some cold water in a *low* pressure environment would provide the best results, I assume. (I.e. vacuuming the exit of the column instead of blowing into the entrance of the column.) I don't know if that would decrease the throughput, but it should improve the efficiency (I think?) In any case, evaporating water cools the air (𝚫H of vaporization), while desiccant absorbing water heats the desiccant (and indirectly heats the air by contact if the desiccant is hot enough).
Also note that because cold water has a lower vapor pressure the efficiency drops significantly as the air gets cooler. Reducing the pressure can compensate somewhat. But the vapor pressure drops dramatically at low temperatures. zimmer.csufresno.edu/~davidz/Chem3AF97/ChW/vaporpressh2o.html As you can see, the vapor pressure of water is around half at 60C vs 80C. The vapor pressure is probably affected slightly by the salts though.
I can see how indirect humidication should cool the room, but I don't think it practically works very well for a number of reasons. Main one is that it cools it the same amount you heated the desiccant, so only the heat carried away by the desiccant is actually doing any cooling work, the rest is wasted.
Also the column is high pressure instead of low pressure, so you are fighting the vapor pressure of water instead of exploiting it.
@@ryannicholl8661 Fair point. But I'm not sure if your notion of the indirect evaporator removing only the heat added due to desiccation is correct. The reason being that the indirect evaporator maintains the temperature at WBT so temperature difference is constant (DBT - WBT) and so is specific heat, the only thing affecting the cooling capacity of the evaporator is flow rate which can be increased by scaling it up.
So as long as the energy removed by the evaporator is more than the energy added by desiccation, the air will get cooled, just like the bench prototype of Tech Ingredients.
In fact, scaling it up isn't even necessary, a small cooling tower with axial fans, experimentally, has enough heat removal rate to offset both the heat released during chilling of the desiccant and the heat released during re-cooling of air. I tested it experimentally.
I want to see what that thing can do on a 95* F. day with about 80% humidity!
im from houston i want to see that also
Why not make it and share your findings?
@@ClintonC1991 i dont think i have the patience but if it works i would pay for one
Chennai...full humidity
@@ibcrazysumtimes from the rgv,105 plus with that high humidity. I think that swamp cooler part would bloom up with algae.
Great demo and explanations. As others have said, tons of opportunity for even greater efficiency. For example, sink a holding tank below grade where you can store lots of cold regenerated desiccant, which can be made even colder all night long. Also lets us switch on each stage as needed: circulating conditioned air on a thermostat, regeneration when the sun shines, and cooling of desiccant whenever tank temp rises.
Good ideas.
Maybe with some more tweaking the efficiency could be raised. Interesting system no high pressures and relatively safe components.
I am a HVAC&R contractor. Would like to see it tested at or near to ASME standards
It looks to me that under low humidity it work better, much like cooling towers for industrial cooling
@clean cyclist Actually low humidity would increase the efficiency of this system, but that's because it's a glorified swamp cooler.
Thank you for the technical information it is really helping me learn more about everything! Also, your film or taping rather is very precise and there's no shakiness everything has good light and is in focus! Thankyou camera person!!
I can't wait till you do another cool project, your technical instructing is super informative.
Thank you, Thank you, Thank you!
Thanks from all of us!
@@TechIngredients For a second there, I thought you were an alien with a third hand showing the graphs and moving paper. Now that's a helpful cameraperson.
I'd be interested to see a follow-up, testing this same system in a situation where A/C is really needed, like >90F temps and high humidity. Just how much volume of living space can it reasonably manage? Would it make sense to set up a plenum and distribute the cooled air over a large space or just have multiple units acting more like window A/C? Idk, maybe there's another video in this series that addresses this. I'm impressed with the quality of the videos on this channel, and have subscribed.
this!, its really hard for water to cool air that is already "Cool", I bet you can get better perfomance if the air is at 40c, you might be able to drop it to 18-24c just by using a humidifier (once you desacate the air)
I was starting to see a DIY window solar aircon for renters, but the video ended.
Loved your video, specially ♥ the technical depth presented.
*pauses video to take notes*
One "human being" shower head. No other fauna based shower head will work.
LowPriceEdition what about mister heads used in green houses?
@@alanl.simmons9726 As opposed to Mrs Shower Heads used to, um; nope, not going to go there!
Somebody call Linus. We need a pc build for this
swamp cooler pc watercooling is absolutely a thing. Only issue with it is the noise and refilling water. I didn't have any issues with contamination or overly-humid room air either :D
@@Deaner3D what about the overly humid PC parts?
@@Deaner3D just get a hose and a float for the water. set it at the desired level and boom water refilling issue solved. and well the noise i guess use ear plugs.
We can use the water cooling system to heat the water instead of solar power! BAM, One stone two birds!
Hahahaha yes tag him
You may want to add a drip edge, (similar to ones that are found near rooves) within the cooling columns, this would ensure the liquid droplets are falling within the pipe, rather than running alongside the walls, while also allowing airflow. And like others have said you can extend some of the columns, double up the radiators in Ceres, and insulate insulate insulate.
Very interesting indeed although living in Pakistan I do not see a need for air cooling at 17C ambient. We use crude evaporative cooling in the dry hot weather in May and June, and I mean hot over 40C . It is extremely effective but looses efficiency with the onset of the Monsoon and the humidity shooting up in July-September . This is the period when I think a desiccant system like yours could be of a great help . I plan to experiment with a system like yours in 2025 .
Thanks very much again for sharing your valuable knowledge 👍
This channel is a gem! It has a hip New England vibe, It is produced nearly professionally and ALWAYS interesting till the end. I can't praise you enough for your 'patience' in your audience. Absolutely fantastic subject matter and seemingly unlimited (local) resources. Please keep 'em comin'!
In order to bleed off as much heat as possible, digging a deep hole (or two) and taking advantage of the thermocline/"root-cellar" effect, could prove quite advantageous to certain parts of the system. Also, while this is a very, very worthwhile and cool experiment (no pun intended) one of course could achieve more effective cooling by pairing a high efficiency AC unit to some solar panels, mini-wind turbines and a bank of deep cycle/SALT water batteries and be cool as a cucumber 24/7 all summer long but I digress... it will be very interesting to see how much more efficient the DIY system in the video might achieve with some additional tinkering(?) btw, great channel... can't wait to see what's coming in future videos!
I'd say solar powered AC should be pretty effective even without anything else.
Primarily because there is a very high probability that day that's exceptionally hot will also have a considerable amount of sunlight available...
Problem with the root cellar effect thing is that the surrounding soil will heat up and then you’re back to square one. See Thunderf00t’s Waterseer busted video for a detailed explanation.
@@jackdallwitz5086 - True... "eventually" the lower thremocline temperature would be overcome by the waste heat radiator temperature :( Only other (natural/free) option to bleed off waste heat would be to set the waste heat radiator into a spring fed or mountain fed, cold water stream, which of course isn't going to be very practical but it definitely would work quite well.
@@KuraIthys Houses stay hot well after the sun goes away.. Then again, most people aren't home during peak sun time when it would be most useful.
@@wisenber it is worth noting that a well sealed and insulated house will change internal temperature based on equalization with external temp pretty slowly. If you have a high thermal mass interior construction, this is much more so the case. A house built new these days is often required to be at least somewhat sealed and insulated to meet code. It can be a rather large hassle to accomplish this with an old house, but it is usually cost effective over the long run if enough power is input into the house climate control. It's up to the user preference about how much they control the climate.
24:53 Aww, that paper pull was kinda cute :D Im glad you get to do the stuff that apparently makes you happy and also educate people about it. Great channel :)
As I sit here watching this, while listen to my neighbors noisy AC unit on this warm summer night in the Texas desert. The one thing that really attracts me to this is how quiet it is. I'm extremely sensitive to noises/vibrations in general, always have been, and like things as nice, quiet, and as peaceful as possible. I have saved this video, and will probably try something like this when I build my own place out away from people. Thank you for taking the time to take us through the steps and processes to understand how to create a version of our own.
The newer modulating AC units are very quiet these days. Something like this won't work well in a humid environment like Texas unless you're in the desert of west Texas
where I live, at 17º C we would be wearing winter clothes :P
Hey great outcome, nothing ventured nothing gained. Looking forward.
I am building one of these, except I am using attached 5x 5 gallon bucket stacks for the evaporator stacks, and I used copper tubing for the solar heater.
Make sure it doesn't freeze where you live. Or if it does, run the pump in the copper coil continuously.
Need to watch for corrosion with the salt solution with copper
@@JamesNewton It will come inside during the winter. Also, I am just building the dehumidifier section
@@noloafingwgas I am also going to try one with some black 1/2" plastic tubing I have
This is so marvelous. Thanks for this video. You've presented a design for a two-stage swamp cooler that separates the "swamp" from the "cool", which is pretty cool, indeed.
One thing I would like to try is using a liquid-to-air heat exchanger (radiator, basically) in the *cools-the-room-air tube* (sorry, don't know what to call it) to keep the desiccant sealed so it doesn't need dehumidifying. Dehumidification of room air will still occur (though probably not as efficiently) by way of condensation on this radiator, which will need to be drained off.
It may not be as efficient, but it would simplify the process by eliminating the solar collector and by possibly allowing common water to be used in the coolant loop since it would then be in a closed loop.
Make a video on Optimizing this system. More insulation, better fans, larger swamp coolers!. see how good this could be. Also run it, use it and see how it does long term . Great job!
Using sun's heat to cool the room heated by the sun. Nice.
ya just use solar panels and li-on batts and it wld be completly green except for the water but using gray or run off cld make it as close as you can
Insulate the cold fluid lines and reseviours as well as both air ducts
also pull hot air from top and blow cold air out bottom instead of other way around.
@@mauriceramsay1082 Cold supply high and hot return low causes air mixing and a more even room temperature. Cold air sinks.
@@genixia If you could put both blowing and sucking on the ceiling far enough away to circulate the new air it would be ideal though, right?
@@knifeyonline yeah, many homes have AC set up that way, with supply registers near distant walls and a central return in a hallway.
And shorten their travel distance
The mystery hand reaching in to move the chart into the light was great, thanks for leaving it.
24:53
I would like to see what happens if you pull the air out of the room from the top where it is hottest and then push it in via the lower pipe, in doing so stacking the cold air at the bottom and pushing the hot air out
I agree. The inlet and outlet should also be separated as far apart as possible, they are so close together, it's just pulling the cool air right back out of the room.
@Jamesy Garfield Most of the energy from the sun is non-infrared, while most of the energy the pipes give off will be infrared. Blocking infrared traps most of the incoming energy while blocking most of the outgoing energy.
If you wanted to get stupid you could pressurize the heater with CO2 to make it trap even more energy :P
@@specialagentdustyponcho1065 a quick google says infrared energy of sunlight at the earth's surface is 52-55% - it's possibly not most but it's more than half.
But doesn't the Ir blocking ability of the glass cause the ir to stay withing the container?
@Patrick Ancona what about what special agent dusty said in that comment?
Awesome work! Typo on the equation sheet: the area of a circle is proportional to the square of the radius, not the square root
This is the best DIY project Ive seen in TH-cam and will have an impact in our environment this can lower our electric bill (one of the highest in the World yes only in the Philippines), Save the environment (No Freon), Inspire young inventors..Thank you so much!
The problem is, these kind of systems don't work well in extremely humid conditions, because the air is already saturated, meaning it can't absorb much (if any) moisture from the air. And "extremely humid" is the only kind of weather the Philippines has.
@@Garryck-1 i just posted about that too lol. This is ok for your dry climates that involve needing humidifiers but in florida our humidity is insanely high.
Look up "swamp cooler". Thats what this project reminds me of and most likely where this guy got the idea from.
@@Garryck-1 Ah but it would work wonderfully in the southwest !
It doesn't actually work. He is wrong. Please don't waste your money.
It would be interesting to see how this system performs if it is enclosed in an insulated structure separate from the structure being cooled. Maybe even power the pumps and fans with solar power? I know nothing about solar panels but I assume it would be possible to use them as the power source on sunny days.
I love this sort of stuff! That water heater coil is genius. I wonder if you could connect several of those in series and get the water even hotter. Maybe even hot enough to kill off bacteria if the water was coming from a stream on your property for instance?
*Nice invention.* The piezo fog elements are even more effective to create cool mist inside of the tube. Keep optimizing this cooler, it will help us all to stay cool :-)
Actually, I think that would not be a good idea. Those piezo foggers actually use quite a lot of energy, and they don't necessarily produce "cool" mist because the energy they use can end up transferring to the mist. Plus, using them in a high salt brine instead of pure water can supposedly reduce their operational life expectancy. Not to mention that a fine mist will be too light to fall downwards against the up draft.
Amazing videos! I think a small improvement could be to switch the direction of either of the fluids in the wort chiller, so that they flow in opposite directions, to get a countercurrent heat exchange, so that the fluids will swap temperatures with each other (ideally), instead of, as of now with a cocurrent exchange, just reaching the mean temperature.
Geothermal cooling-heating is gaining interest among the offgrid community. An a lot simpler tech that can make your house more comfortable without using much electricity, specially with the subterranean pipe with vents and small fans pulling air inside the house system. Convection is another part of the system, so you must open high windows/vents for hot air to escape and create draft, helping the system function more passively.
Has nothing to do with this video but I figured some people watching this video might be interested.
When you get this system optimized, by all means draw diagrams of this and building instructions!
as a chemical engineering fresh grad, i find this really exciting. it's basically chemical engineering in action with all the column design, heats of vaporization and solution, fluid flow, psychrometric charts. oh boyyy!
More likely mechanical engineering but i know why you Would think that
Awesome project. Up until now I haven't noticed that the Main Presenter is actually jacked.
I thought the same thing. Do you even lift bro? ;)
I would love to see this continued and updated. A little more though on the system might improve it and as frosting on the cake it could be electrically powered with photovoltaics. Really enjoy your channel!
I'm supposed to be studying for a thermo exam right now. This counts, right?
Lol hope you did well thermodynamic was the hardest class I feel I'll ever take. Thank God I'm done with school.
@@chokilotechokilote7906 got a credit, weirdly enough. Which is pretty good given that I learned most of the content during the exam.
@@aaronx2724 same man it was the worst looking at something a feeling like you hadn't even covered anything related to what was covered in class. I barely made a B, I thought for sure I was making a C
Sure
If its only 65 in the room, you dont need air conditioning. This needs to be tested on a hot day, at least 85.
I was gonna say just that. It's 17C outside. Just open the window if you want to cool that shed. Honestly 17C is the temperature I start heating my home (I'm used to warm weather since it never drops below freezing here)
I'm curious if it does anything when it's 40*C+ and 80%+ humidity
Tyler Hardy the effectiveness of the swamp cooler will tank when humidity rises. This sort of system would work better in the desert, except water is so expensive to use like that.
@@davidc1961utube Most of us waste water doing just that with just evaporative coolers in the desert. They don't do diddly in monsoon season.
@@davidc1961utube no, no it's not. Water is not expensive, I live in Arizona. You could put new water in it every day and not even come close to a window until in cost.
Great video, a wet and dry bulb reading of air entering and air leaving the system to calculate the grand total heat removed would have been more accurate. You measured sensible heat removed entering and leaving but used your initial water content of the air to calculate latent heat removed and capacity which was measured hours earlier and with different ambient conditions. Not a true measure of capacity but shows it works I suppose. As I commented on your last video, need wet bulb and dry bulb of entering and leaving to accurately measure grand total heat removed.
Sorry to write such a long whingy comment but this is very interesting, you go very deep into the maths of it and are very exacting but don’t quite get an accurate reading of the process.
Love the videos! They inspire me.
Totally agree, wet and dry bulb psycrometer readings will give a better idea of the difference en enthalpy.
I have to say, ideas for that kind of appliances (especially because DIY-doable) is what makes youtube and such channels interesting. I salute you sir. I love DIY but I would have never thought of an AC (I have 5 typical commercial devices, one per room in my house). Should I ever build a house from scratch, now I have an idea how to do a all-rooms integrated AC based on that. Thanks a lot for sharing and keep the ideas coming.
You really need to get sponsorships for your videos. I can't believe there are no tool manufacturers or whatever engineering company that wants to advertise on your channel.
I'm impressed, by redesigning the cooling system you resolved the bacterial issue and introduced the feature of air purification. Do you opensource your system? Are blueprints available? Thanks for your video!
Federico Annunziata these videos are the blueprints!
honestly, once you know exactly what the desiccant is... This video is all you need.
(I'm not sure he said it here, probably in the previous, but it is somewhere for sure)
@@Verrisin I think at the beginning of the video, he mentions Calcium Chloride, but on my experience Calcium Chloride emits HEAT when in contact with water
Honestly, I don't understand why people that are not involved on the build or the design of this device are answering a question that is not directed to them ¯\_(ツ)_/¯
Doubt you would actually build it, so why expect him to prepare everything for you on a silver platter.
17:00 your equation square rooted instead of squaring; the answer was correct though.
I have it on good authority that flat black paints are often not “flat black” in the infrared, but are fairly highly reflective. In order to get a paint that’s not highly IR reflective, one should use one of the very high temperature tolerant flat black paints, such as those used for automotive headers or BBQ grills. I don’t know if it makes any difference in your solar collector but it seems it might and it might be handy to keep in mind for other projects. Amazing videos, thanks.
I think it'd be cool to have some kind of indoor waterfall/water wall using the desiccant solution as a dehumidifier
I was thinking the same thing - a soothing waterfall/white-noise thing that also happens to dehumidify.
CaCl2对人体有危害吗？
@@China.520 No. It can be used as a food salt.
Love this guys intellect & his amazing ability to explain all of of his ideas.. This system is clever but quite complicated. It shows how amazingly simple a window air conditioner is, hence why it is in production to this day.
I don't know if I would agree that typical refrigeration / Air conditioning is 'simpler'.....it's just different. Apples and Oranges. IMHO
Modern air conditioning is simple. Two heat exchangers, two fans, a pump, and a valve/orifice.
I'm blown away by the quality content of this channel. Keep it up!
I can respect his conclusion saying the system can compete, not blow away the current air conditioners, that is being honest, I enjoy hearing the physics side, if our lecture could tickle our interest with projects like this uni would be a bit more fun, but South Africa has only so much to offer. Thanx for the share, this is very interesting.
I want this well-meaning smart-as-hell total nerd running our country.
I don't
Technocracy does not work and has always only ever resulted in disaster, starvation, and mass graves. I'd rather we all run our own lives, and this gentleman run a business from which I can buy his creations.
@@nERVEcenter117 Yet you can't actually cite any examples.
@@nERVEcenter117 Couldn't be much more of a disaster than the politicians and bureaucracies now-a-days.
@@upnorthyooper1196 i suppose your of the thought train that having a friggin idiot like we have now is somehow better?
Would love to see this system in action on a hotter day.
Yeah - I wonder if the solar unit performing at a hotter temp might drive better performance?
@@johnbeeck2540 no, solar cells actually lose efficiency when they get warm. Putting solar panels in a desert is undesirable for this reason
@@kebab4387 he's not using power cells, he's using a solar heater. That thing will work better the hotter it gets. Not sure if that would make the whole machine operate better tho
@@kebab4387 super hot weather here in Arizona may lose a small percentage of efficiency but I bet with the more sun hours a day here compared to other places like lets say the Pacific Northwest it will charge a battery faster and thus more efficient.
Yeah, No Doubt, all that complication for 3 deg F and its only 64 out side? Thats basically just a box fan in a window. Bring it to the Actual places its needed where the temps are 90+ and humidity is 80% year round and see how it performs..
Now that it's summer again, would you please consider doing this again during higher temperatures, and blocking the windows to keep the sun from heating the room? I'd love to see measurements on how this performs in higher temperatures and higher humidity levels.
yeah, like here in Citrus County, Florida. it was 92F with 85% humidity
I'm curious too as to how viable this would be during the Summer. Texas heat killed my AC units so an alternative would be nice to explore, even just to mess around with if the AC units are repaired/replaced
I'd be interested in seeing how much of a difference blocking out the sun makes as well.
I'd say there is a reason why this video was taken at 17,5°C ambient outside, that's the moment where I need an AC most!
unfortunately most of his videos are full of incorrect measurement, nice calculations but the moment he wants to prove those using measurement, the whole house of cards collapses...
@@Anderas73 just wondering, do you feel hot @ 17.5°C ? It's freezing cold to me
This is awesome, I did a similar project years ago, but using a copper pipe into the ground and having a small mesh in between I think it's called geothermal energy or something like that, if reduced the heat and captured moisture, I got that as a mistake, my original idea was to suck water out of the air so my chicken had constant water since I didn't have a water source near by, noticed it cooled their chicken coop when I didn't see them outside playing and instead chose to stay inside. Anyway, I powered the motors that sucked the air out with harbor freight solar panels. It eventually broke cause I neglected it but this made me want to do something similar using some of the applications here. Thank you for inspiring me to get back to it.