Better to just use a 24volt fridge compressor. They consume about 45watts and can reach freezing temperatures. More practical. Peltiers are more effective at generating high heat than at cooling
With 45 watt compressor, you can cool down 10 liter small fridge. Not 2000 liter car! Otherwise, car manufacturer could use that compressor and we would be able to cool down the car for 10 hours only with 45 amp 12 volts car battery.
@@tr9036the HVAC systems in modern cars are insanely over speced. A 45 watt compressor would be more than enough to cool the inside of a car to the dew point, removing the humidity from the air and causing a greater cooling effect. Plus it'd last about 2000 times longer than those tecs, that will start dying at around 30 hours.
@@Shukodoshi If there is no sun, if car has tripple wall glass and spaceship spec insulation, you might be right. Otherwise, you are not. My car"s ac blows 10-12 degree celcious air from the vents in full power and even though it is barely enough to cool down in very hot climate. Think about that, small office fridges has 90 watt ac compressors and when you plug it in, it takes 1-2 hours to get it cool down the inside of the fridge. Consider that fridge has perfect insulation walls, No direct sun light, no glass, no heat source inside like humanbeing! To cool down a car, you need 3000-4000 btu cooling power since there is almost no insulation, constant temperature source (sunlight, humans in the car) 300 watt electric compressor maybe sufficient for a small car.
Just to give you an idea of how insane the amount of heat is inside a vehicle in the sun in hot weather, hear this personal experience- I tried to cool just the front two seat area of a step van one time, using a generator and a rooftop RV air conditioner. I bought the rooftop ac brand new, and I think it was 12,000 or 16,000 BTU's. It blew really cold air, but when the sun was shining and it was hot, it was not nearly enough to cool down the cab. It felt hotter having the ac on with the doors closed than it did with the ac off and the doors open. And I closed off every place where hot air could be leaking in, but it didn't matter. The front cab was airtight, but it didn't matter, because the heat from the sun and the hot air outside were just way too much, and the aluminum body was also a very poor insulator. So I bought a huge 20,000 btu wall unit ac and put it on the roof, and it was actually able to cool the cab down just a little bit and make it comfortable, but still not like really refreshingly cool. And the generator could barely run it most of the time, so I just took it out and dealt with the heat from that point on. Cars have better insulation than an aluminum step van, but it isn't that much better with all the windows and how thin the roof panel is and how hot everything gets just from sitting in the sun. So you need at least 18,000-24,000 BTU's just to get a car comfortable enough to not sweat in within 5 minutes after baking in the sun in a hot parking lot for a couple of hours.
This was just a fun project afterall. Of course, peltier modules are not that efficient in exchanging the heat. Although the compressor may need a maintenance like the refrigerant, oil or the filter check after some time.
@@albertnario4877 That's not bad at all Albert! When temps outside can reach 40 Celsius maybe more in other countries... I'd say that's a nice step in the right direction. Well done!
@albertnario4877 ignore the trolls, you made something that works for cheap, i doubt the people giving you grief have engineered something similar and working, even if its not perfect, it worked and the formula is a reasonably simple reproducable one, thanks for sharing, it was a fun vid.
As someone who has in the past had to drive a car without air conditioning where summer temps can be as hot as shown here, I can 100% see someone being more than willing to do this. You do what you have to to do.
Compressor AC efficiency 200-400%. Peltier cells efficiency 40-70% on cold and 100-150% on heating. This is with a good design. your design seems good.
I agree with your statement at video end. It is hard to compete with the efficiency and power of conventional heat pump system. I have purchased the 8-bank TEC cooler module from Amazon for the personal cooler suit. 4L of solid ice does not last long in 34C with 108kg 2m tall working man, ~3.9hrs. With hope that the 8-bank TEC module can make light the backpack to carry a Lithium battery and maybe less than 1L of circulating water.
@@keirthomas2491 lol, i did this about a decade ago... had big ideas... ha. im no good at selling anything. or getting funds. first it was a dozen grip heaters glued to the tank on top of PU foam... brilliant... a hard lesson on current draw and resistances? destroyed a wiring harness... like speakers, series AND parallel matters... fixed that... peltiers, pumps, PC radiators, a grid of water pipes dangled over the seat... comfiest ride in mid summer i ever had! mmm... yes, it did cool... barely. and pulling 15A... this is the issue, not many bikes can generate more than 150-200W... found water cooled pillow slips... AU$29 from usa... 139 shipping. local supplier? $900! (paragon medical, hypothermia blankets, iirc...) can get blankets, but i wanted the little pillow slip come seat cover... havent found anything similar. so there went that idea... TEC is NOT the way to go. i do have a waterblock thats bulged from getting them to about minus 50C with no antifreeze? theyre fun to play with... and, this was still a decade ago... they were developing 150W compressor refrigeration units about the size of a coke can for military gear... minus the radiators. the human body is, on average... "200W". you do need a fair bit of cooling power... a LOT actually... seriously, i would be more impressed by a new bike model if it had a heat pump on the seats and bars than any of the features i do see... not just warm, but cool as well...
make a car AC using universal blower-evaporator unit, it's already have everything from blower, case, expansion valve and thermostat. It only needs piping, compressor and condensor. But, instead of going with car air-conditioning compressor, go with a 1/2 hp mini split compressor and use psw inverter to run it. that way i think you'll get better performance
Actually use the heat pump from a salvaged Tesla, its already designed for running on low power and doesn't need to be actuated the way a traditional car AC system does.
@@Enonymouse_ with parts hard to find for them to begin with, do you ever find them being parted out? Sounds like a good idea, there's almost no options between 15amp window ac units and expensive 12v camper AC units. I was curious about off grid AC but there's very little low power low cost options.
Wonderful video, thanks for sharing the project, this is an excellent walk through of making a simple, and reletavely inexpensive cooling solution. Thanks, that was fun to watch it come together.
Actually, it will increase fuel consumption a lot. 600 watt/ 12 volts = 50 amper. Alternator can not catch it and eventually your battery will be empty. Even while driving the car.
@tr9036 im aware, but sometimes engineering for the sake of it is fun, even if its not completely practical, they can still drop wattage and use it, though yes a 12v refridgerant based syatem would be vastly more efficent. This is fun and interesting to just watch someone else's creative process. Less destination, more journey.
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35 celcius degree is crazy. You did the best mate.
Great idea except for a couple of problems and that is BTU capacity and efficiency. [A BTU is the energy required to heat or cool cubic foot 1degree] Peltier coolers are a last resort cooling because they are sooo inefficient. The device created may cool a small ice chest but certainly not a car. You would have to mount a 300-amp alternator to the engine, run it at its max and have more than a 100 of his devices connected to it.
I would think that you could place a bucket full of Ice Cubes under your hood. Have a hole in the Bucket with a 12V Computer Fan blowing through - onto the ice. Then take two plastic flexible hoses (output from the ice-filled Bucket) inside the car. A hole in the bottom of the bucket would drain off water. Just fill with ice when your journey begins - from your Refrigerator. I am sure that this would give you 30 minutes of cooling whilst driving. Somebody should make a video of this, because Peltiers just do not work efficiently in that application. Alternatively, make a cheap Evaporative Cooler System. that draws only 500mA. I did admire the work and effort involved in the making of this video. Greetings from Australia.
Good work but keep in mind, TEP are very inefficient when it comes to power to work ratio.Nothing beats a good old compressor cooling system. I would hunt for a 200 watt compressor and make an ac from it, it should beat this peltier experiment.
Cool that you realised this built, I was thinking of a thermoelectric AC but came to the conclusion that it will not be strong enough. First thermoelectric (peltier) generates far more heat than it takes out of the cooling medium. So its more of a outdoor heater... and with water there is no phase change but only the temperature difference of the water. The phase change carries much more energy though. gas->liquid->gas The problem with water is that this happens at 100C so not really fits for cooling. You can use the solid-> liquid phasechange by manually putting a bucket of icecubes into the car and blow a fan on it.
i already tried those ice bucket and blower.. i did use a radiator to harness the low temperature and it's cold for 5mins and all ice is melted.. yes peltier is inefficient for cooling, but for those who are curious for what if.. then there it is 😁 I'm curious to back then.. 😅
Need to get rid of the heat generated from the peltiers and separate as much as possible from the cool side. Still horribly inefficient, but may be a life saver with enough solar panels to drive it and a small insulated box to escape to! Transferring the compressor and tubes from a refrigerator would be cheaper and more efficient too.
You should have put a 1/2” space in the middle for a 3rd bolt so the outter boxes don’t just flex. Regardless, thermoelectric coolers have less temperature variation than a regular phase change system (like a normal AC) and use more power. IE there is a reason AC systems are dominant for large temperature charges. Even electric car still use AC systems driven by an electric motor instead of the engine. Most car AC will give you 20 degree C difference instead of the 7 you got there. For the US, he went from 80F to 68F, while a normal car AC in 80f ambient should result in 40F output at the vents, minimum.
Why use liquid to transfer heat? Replace the headliner with the Peltier blocks, so it cools the interior from the top down & there is air flow over the other side (the roof).
at 600w youre better off installing the guts of small house air conditioner or a heatpump of some sort. they would use less power by being more efficient at both power usage and the amount of heat they could pull out of the cabin. you could easily cut power usage down to 200-300 watts when running full power. even a cheap portable aircon running off an inverter would only use about 400w peak and they are horribly inefficient. its a "cool" idea though, the install was very neatly done
I've never seen an ac that pulls less than 1500w (maybe 1300), plus the huge startup draw. Maybe some really expensive camper AC units, but I think most of those are 1200watts.
@@Dan-yk6sy i have a cheapo chinese portable unit, 2.5kw cooling, it uses a lot as a surge at startup but once it is running it settles down to under 500w once everything is up and running
Awesome job well done but i build an ac with peltiers but its not very efficient i suggest use compressor system which is more effective and consume less power and generate better cooling
In reality, he used 24.8 volts, so the amperage is approximately 23, but experience shows us that it is worth doing it and eliminating the problems of the compressor?
You may want to use a gas compressor that only works when the car is moving? it surely will be more energy efficient. I loved that little electric car. LOL.
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Wouldn’t be a bit easier, and possibly achieving the same result if you would have used 6 240mm cooling blocks? I was thinking about this right after watching your video. I think it would simplify much more your project and achieve similar temps.
Edit: Ok, Sorry, Now later I realised by other posts you used 24(!) TECs! That does change the picture slightly, so my estimates where based on 12 TECs, arranged as 6 pairs of 2 in series. Efficiency will be higher with 24, but I don't think it changes everything radically, anyway I should stop speculating without adding 12 more TECs and check the datasheets how it impacts calculations. Ok, now follows my flawed original analysis / post: uuuuuh... you know you can calculate an estimate of the cooling power before starting the project? You use ALOT of power, but the cooling power is in how many watts it can continuously transfer (from cold to hot side) while maintaining the hot side temp at a reasonable temperature. So, I generously in your favor first estimated a hot-side of atleast 50C ...but considering the somewhat "low" power usage it's probably an indicator of quite higher, maybe like 65C TEC hot side. So, pulling 600W, at best pumping 250 to 270 W or so. Uh-Oh! Naughty rascal! I caught you! You did a little "bait and switch" with the "after 15 minutes" video clip showing 20.4C. That 15 min was a blatant lie, it was probably the next day after a nights cooling. Just check the change in shadows, what direction they move in? Time is clearly at an earlier time of day than first video shot. Besides, to cool a car that quickly, 10C in 15 minutes, would require a compressor with probably 3000W capacity. There are no free lunches with TEC's, they are horrible devices for larger heat loads requiring >100W pumping capacity. Good effort anyway, Looks really cool tho.
Hello, your project is very nice. However, I think that systems made with Peltier are very low in cost and efficiency. Instead, it would be more efficient to choose refrigerator-type cooling with a 12v aquarium compressor and copper pipe.
so ,this being your second version ,did it work better than the first ,the first seemed to have destroyed your engine bay by the looks of it,this one didnt work that well either did it ,for the effort,peltiers just dont ever work the way you want them to ,cheers guys
I would have bought two more radiators and put peltier directly on it, because more water flows through a radiator than through an aluminum block...In my opinion
Aus meiner Klimaanlage kommt 12 Grad kalte Luft um den Innenraum gerade so zu kühlen, mit 20 Grad dauert es Ewigkeiten. Allein die Sonnenstrahlung durch die Scheiben schreibt das Steuergerät 3000W Sonneneinstrahlung gemessen durch den Sensor. Eine Kfz Klima hat 28000Btu Leistung!
ye but 1300W in a ac compressor has atleast 3000W (probably more) of thermal moving power, peltier modules literally will only move about as much as they pull
Why is it impossible to find an ac less than 1500watts? Especially with all the tiny homes and off grid cabins you'd think there'd be some Chinese 600 or 800 watt AC units for off grid or something.
@@Dan-yk6sy Reasons would be a house leaks in heat in the summer, and outside the house the heat is coming down at an avg rate of near kW per square meter during sun hours. To cool something, in summer with a puny compressor you basically need to be living in a large well insulated walk in freezer. Problem is you will need a constant supply of fresh air as not to be asphyxiated = warm air (with moisture) will be forced in, pushing out the cold air. That is an added heat load on compressor. A human is generating heat by just being there, adding another 100W or so per person IF they are at rest, any phys activity will instantly add a higher heat load. Any equipment in the "cool room" will emit heat. Computer / Laptop, monitor / TV, lights, tea kettle, cellphone chargers, stereo equipment etc. will add more heat load. It gets a little complicated, beyond the overheated person. To get efficient cooling capacity you will need a split unit. These mobile rolling indoor "all-in-one" room AC are all terrible. Main reason is that the unit is pumping out cold air from room thru the hose! The hose is also warm, leaking heat right back in. The massive AC compressor heat is present in the room! A split unit, all that compressor heat would be separated and outdoors, no forced ventilation, room for more effective heat exchangers. Usually the power OMPH is needed to catch up to an already warm house, to repel the heat stored in roof and walls + cooling the air. Once room is cold the power requirement will drop significantly - here is the next advantage, modern split units (in Europe atleast) most has inverter speed regulated compressors, avoiding the clunky noisy start stop routine! Once it has caught up it just goes much slower raising overall efficiency.
@@Dan-yk6sy But hey, for what it's worth, the micro AC is something I'd like to see too! That should be available for those that only wish to cool a bedroom or something. Ha! Should call some DIY- / HVAC guy that converts a large fridge from junk yard to a split unit! Probably a hell of a work to liberate it from fridge.. maybe focus only on the thermostat and compressor. Then buy the pipe works and heat exchangers. To keep cost down, make it rugged it will probably be an on-off regulation, but a fridge compressor outside doesn't make much of a noise.
Use old refrigirator pump make copper coils and fan blow into them and power inverter 12v to 220v. At 400w use you will get more than kilowatt cooling power. Peltier have small efficiency and from power used you get an fraction of cooling power
its a bit expensive but how about replacing your aluminum water blocks with copper. it should increase thermal conductivity. also why not use distilled water instead of coolant?. i mean you risk boiling or freezing water. but thats why you have heat sinks and giant fans.
That will work if you have a 1000 watt generator in the trunk. Peltiers have their place but massive heat transfer, like is required for aircondition is way out of their league.
Peltier is just for electronical chip cooling for very limited spaces. Peltier doesn't make any heat gain. If you use compressor and refigirant gases you get as high as X 4 cop values. 600 w is very high power for batteries. This is only conceptual system we electronical engineers use peltiers to cool our chips more than 40 years
Some Chinese company needs to start making some 600w or 800w cheap AC units for off grid and redneck projects like this. The smallest cheap window ac is always around 1500w.
Good idea but use too much energy and car's battery very soon get broken.... This is good for home air-conditioning because there you don't have limit for energy
For a car, the motor should be always running since the alternator is supposed to power the A/C and not the battery actually, unless you have an external source.
TEC1-12706 (12v 6A) 24x 12v 6A (72w) TECs Thats 1'728w on layout 3s 4p So that is then 36v 24A (864w) per XT60 So need 36v 48A or 72v 24A power supply But your running it on 12v and have relays to switch 2s from/to 2p mode ? Basically running it at 1/3 power or 1/6 power ? If I understood it correctly 🤔 So sacrifice power to efficiency If I remember correctly at full power those modules are like 5% efficient at full power But what is the efficiency at 1/3 or 1/6 power?
ps the hotter it is outside the more cooling youll get as it trys to normalize the inside and outside ,also once the car is moving that will help,also im unsure if those water blocks have the correct type of fins inside for heat transfer like cpu water blocks made of copper
ok,yes i worded that wrong i ment exhaust that vents the hot side out,the hotter it can exhaust the colder it will get,,i wasnt paying attention was wondering what happened to his car
@@angusmcgil This system is terribly inefficient for using as an air cooler. This guy has like 24 of those peltier modules which draw a lot of power, while providing minimal cooling. While it works for the sake of a TH-cam video, it's impractical.
Tough fight.. AC Compressor: - Typical efficiency: 20-40% (COP: 3-5) - High-end models: up to 60% efficient (COP: 6-8) Peltier Cell: - Typical efficiency: 2-5% (COP: 1-3) - High-end models: up to 10% efficient (COP: 4-5) Key differences: - AC compressors are 4-8 times more efficient than Peltier cells - AC compressors can achieve higher cooling capacities COP (Coefficient of Performance) measures the ratio of heat transferred to electrical energy consumed. Higher COP values indicate better efficiency
If you use soft power ramp up and ramp down it will lessen the mechanical stress greatly. Amount of cycles impacts alot. With only a few soft cycles per day it could last way over 200'000hrs according to some datasheets I've gleened at. I would also surmise that using it at really high DeltaT will also present as a constant stress on the several hundreds of internal solder joints.
Cool (pun intended) demonstration of your skil in building.something. Hopeless at AC power vs a common hermetic system but aside from the circulation pump there are no moving parts.
ha ha ha ha, what a power consuption. 36 Peltiers multiply with 6Amp = 2800 Watts or Approx 3KW of power means brand new engine will need to be replaced after 2 months
how can I contact you? And if you install a 24-rod pelt 12703 at 3 amperes, then the power will be two times less? I want to set it to 12 volts. Does the thermostat maintain the set temperature in the cabin?
-Very large heatsinks... passive convection- sorry, forgot the small part. Other solution would be undervolted fans held in place by soft suspension as not to impart vibrations into HIFi box.
![กี่หมื่นฟ้า | Your Sky Series EP.1 [2/4]](http://i.ytimg.com/vi/qJbQs_nhjD4/mqdefault.jpg)
Better to just use a 24volt fridge compressor. They consume about 45watts and can reach freezing temperatures. More practical. Peltiers are more effective at generating high heat than at cooling
With 45 watt compressor, you can cool down 10 liter small fridge. Not 2000 liter car!
Otherwise, car manufacturer could use that compressor and we would be able to cool down the car for 10 hours only with 45 amp 12 volts car battery.
@@tr9036the HVAC systems in modern cars are insanely over speced. A 45 watt compressor would be more than enough to cool the inside of a car to the dew point, removing the humidity from the air and causing a greater cooling effect. Plus it'd last about 2000 times longer than those tecs, that will start dying at around 30 hours.
@@Shukodoshi If there is no sun, if car has tripple wall glass and spaceship spec insulation, you might be right. Otherwise, you are not.
My car"s ac blows 10-12 degree celcious air from the vents in full power and even though it is barely enough to cool down in very hot climate.
Think about that, small office fridges has 90 watt ac compressors and when you plug it in, it takes 1-2 hours to get it cool down the inside of the fridge. Consider that fridge has perfect insulation walls, No direct sun light, no glass, no heat source inside like humanbeing!
To cool down a car, you need 3000-4000 btu cooling power since there is almost no insulation, constant temperature source (sunlight, humans in the car)
300 watt electric compressor maybe sufficient for a small car.
Just to give you an idea of how insane the amount of heat is inside a vehicle in the sun in hot weather, hear this personal experience- I tried to cool just the front two seat area of a step van one time, using a generator and a rooftop RV air conditioner. I bought the rooftop ac brand new, and I think it was 12,000 or 16,000 BTU's. It blew really cold air, but when the sun was shining and it was hot, it was not nearly enough to cool down the cab. It felt hotter having the ac on with the doors closed than it did with the ac off and the doors open. And I closed off every place where hot air could be leaking in, but it didn't matter. The front cab was airtight, but it didn't matter, because the heat from the sun and the hot air outside were just way too much, and the aluminum body was also a very poor insulator. So I bought a huge 20,000 btu wall unit ac and put it on the roof, and it was actually able to cool the cab down just a little bit and make it comfortable, but still not like really refreshingly cool. And the generator could barely run it most of the time, so I just took it out and dealt with the heat from that point on. Cars have better insulation than an aluminum step van, but it isn't that much better with all the windows and how thin the roof panel is and how hot everything gets just from sitting in the sun. So you need at least 18,000-24,000 BTU's just to get a car comfortable enough to not sweat in within 5 minutes after baking in the sun in a hot parking lot for a couple of hours.
to complete this little project all that's missing is an aircraft carrier's alternator and 70 truck batteries
When ever I see flip flops in a video, I know I"m dealing with a professional.
This was just a fun project afterall. Of course, peltier modules are not that efficient in exchanging the heat. Although the compressor may need a maintenance like the refrigerant, oil or the filter check after some time.
I'm your guy then loll
😂
Easy your IT help in the future may suffer now. That comment will get ya credit card hacked 😂😂😂😂
@@ianbuilder make another video about AC refrigeration system, but use a universal car indoor unit :D
Great job! There are some snide comments here, but your project looks well planned and completed.
thanks 🙏
maybe they expect better results .. but that's peltier all can do for cooling..
24 amps at 24 VDC, are the batteries in series, if so, how are you charging them Kuya.
@@albertnario4877 That's not bad at all Albert! When temps outside can reach 40 Celsius maybe more in other countries... I'd say that's a nice step in the right direction. Well done!
@albertnario4877 ignore the trolls, you made something that works for cheap, i doubt the people giving you grief have engineered something similar and working, even if its not perfect, it worked and the formula is a reasonably simple reproducable one, thanks for sharing, it was a fun vid.
@@tek5358CHEAP??
The peltiers alone are 200 to $300.
And did you notice that there's no engine, or room for one.
As someone who has in the past had to drive a car without air conditioning where summer temps can be as hot as shown here, I can 100% see someone being more than willing to do this. You do what you have to to do.
Compressor AC efficiency 200-400%. Peltier cells efficiency 40-70% on cold and 100-150% on heating. This is with a good design.
your design seems good.
Some people might think the filter is "over the top". Fan and radiator longevity are crucial.
I agree with your statement at video end. It is hard to compete with the efficiency and power of conventional heat pump system. I have purchased the 8-bank TEC cooler module from Amazon for the personal cooler suit. 4L of solid ice does not last long in 34C with 108kg 2m tall working man, ~3.9hrs. With hope that the 8-bank TEC module can make light the backpack to carry a Lithium battery and maybe less than 1L of circulating water.
Nice man! I'm designing a dual season heater/cooler that connects to a motorcycle A/C vest.
@@keirthomas2491 lol, i did this about a decade ago... had big ideas... ha. im no good at selling anything. or getting funds.
first it was a dozen grip heaters glued to the tank on top of PU foam... brilliant... a hard lesson on current draw and resistances? destroyed a wiring harness... like speakers, series AND parallel matters...
fixed that... peltiers, pumps, PC radiators, a grid of water pipes dangled over the seat... comfiest ride in mid summer i ever had! mmm... yes, it did cool... barely. and pulling 15A... this is the issue, not many bikes can generate more than 150-200W...
found water cooled pillow slips... AU$29 from usa... 139 shipping. local supplier? $900! (paragon medical, hypothermia blankets, iirc...)
can get blankets, but i wanted the little pillow slip come seat cover... havent found anything similar.
so there went that idea... TEC is NOT the way to go.
i do have a waterblock thats bulged from getting them to about minus 50C with no antifreeze? theyre fun to play with...
and, this was still a decade ago... they were developing 150W compressor refrigeration units about the size of a coke can for military gear... minus the radiators.
the human body is, on average... "200W". you do need a fair bit of cooling power... a LOT actually...
seriously, i would be more impressed by a new bike model if it had a heat pump on the seats and bars than any of the features i do see... not just warm, but cool as well...
make a car AC using universal blower-evaporator unit, it's already have everything from blower, case, expansion valve and thermostat. It only needs piping, compressor and condensor.
But, instead of going with car air-conditioning compressor, go with a 1/2 hp mini split compressor and use psw inverter to run it. that way i think you'll get better performance
Thankyou for your suggestion. I am searching for the options for such system. Can you please provide more information for such a compressor?
His solution is cheaper though.
and less to go wrong with it
Actually use the heat pump from a salvaged Tesla, its already designed for running on low power and doesn't need to be actuated the way a traditional car AC system does.
@@Enonymouse_ with parts hard to find for them to begin with, do you ever find them being parted out? Sounds like a good idea, there's almost no options between 15amp window ac units and expensive 12v camper AC units. I was curious about off grid AC but there's very little low power low cost options.
Great design and good craftsmanship. Professional video recording. Nice product. Keep making more videos like this one.
Thank you very much!
No moving parts and DC! You just made the OFF GRID air conditioner for a 700 watt system. Perfect for buses and cabins. Good job 👍
I'm also thinking about that.. like passive cooling, if there's the sun ☀️, here is the cool air... 😁
You should ALWAYS pull the Teflon tape to a thread, use it to pack the thread spaces and THEN wind the wider tape on top…Be Blessed.
I like the idea but can we see a comparison of regular car A/C and the peltier to judge efficiency?
I can tell you Peltier's are way too inefficient for this application generating mostly heat.
Wonderful video, thanks for sharing the project, this is an excellent walk through of making a simple, and reletavely inexpensive cooling solution.
Thanks, that was fun to watch it come together.
Actually, it will increase fuel consumption a lot. 600 watt/ 12 volts = 50 amper.
Alternator can not catch it and eventually your battery will be empty. Even while driving the car.
@tr9036 im aware, but sometimes engineering for the sake of it is fun, even if its not completely practical, they can still drop wattage and use it, though yes a 12v refridgerant based syatem would be vastly more efficent. This is fun and interesting to just watch someone else's creative process. Less destination, more journey.
35 celcius degree is crazy. You did the best mate.
I like your craftmanship. That's improved very well
Great idea except for a couple of problems and that is BTU capacity and efficiency. [A BTU is the energy required to heat or cool cubic foot 1degree] Peltier coolers are a last resort cooling because they are sooo inefficient. The device created may cool a small ice chest but certainly not a car. You would have to mount a 300-amp alternator to the engine, run it at its max and have more than a 100 of his devices connected to it.
I would think that you could place a bucket full of Ice Cubes under your hood. Have a hole in the Bucket with a 12V Computer Fan blowing through - onto the ice. Then take two plastic flexible hoses (output from the ice-filled Bucket) inside the car. A hole in the bottom of the bucket would drain off water. Just fill with ice when your journey begins - from your Refrigerator. I am sure that this would give you 30 minutes of cooling whilst driving. Somebody should make a video of this, because Peltiers just do not work efficiently in that application. Alternatively, make a cheap Evaporative Cooler System. that draws only 500mA. I did admire the work and effort involved in the making of this video. Greetings from Australia.
you way is more efficient but ice in a bucket in Asia wont last more than 3 hours.
Good work but keep in mind, TEP are very inefficient when it comes to power to work ratio.Nothing beats a good old compressor cooling system. I would hunt for a 200 watt compressor and make an ac from it, it should beat this peltier experiment.
I agree with you 👍
Cool that you realised this built, I was thinking of a thermoelectric AC but came to the conclusion that it will not be strong enough. First thermoelectric (peltier) generates far more heat than it takes out of the cooling medium. So its more of a outdoor heater... and with water there is no phase change but only the temperature difference of the water. The phase change carries much more energy though. gas->liquid->gas
The problem with water is that this happens at 100C so not really fits for cooling. You can use the solid-> liquid phasechange by manually putting a bucket of icecubes into the car and blow a fan on it.
i already tried those ice bucket and blower.. i did use a radiator to harness the low temperature and it's cold for 5mins and all ice is melted..
yes peltier is inefficient for cooling, but for those who are curious for what if.. then there it is 😁
I'm curious to back then.. 😅
Need to get rid of the heat generated from the peltiers and separate as much as possible from the cool side.
Still horribly inefficient, but may be a life saver with enough solar panels to drive it and a small insulated box to escape to!
Transferring the compressor and tubes from a refrigerator would be cheaper and more efficient too.
Complimenti ragazzo, questa è arte. Quella che pochi conoscono è si sentono professori
You should have put a 1/2” space in the middle for a 3rd bolt so the outter boxes don’t just flex. Regardless, thermoelectric coolers have less temperature variation than a regular phase change system (like a normal AC) and use more power. IE there is a reason AC systems are dominant for large temperature charges. Even electric car still use AC systems driven by an electric motor instead of the engine. Most car AC will give you 20 degree C difference instead of the 7 you got there. For the US, he went from 80F to 68F, while a normal car AC in 80f ambient should result in 40F output at the vents, minimum.
yes peltier cooling is far beyond compare to compress type cooling...
Элементы Пельте потребляют очень много электроэнергии! Где вы столько возьмёте в обычном автомобиле?
Why use liquid to transfer heat?
Replace the headliner with the Peltier blocks, so it cools the interior from the top down & there is air flow over the other side (the roof).
at 600w youre better off installing the guts of small house air conditioner or a heatpump of some sort. they would use less power by being more efficient at both power usage and the amount of heat they could pull out of the cabin. you could easily cut power usage down to 200-300 watts when running full power. even a cheap portable aircon running off an inverter would only use about 400w peak and they are horribly inefficient. its a "cool" idea though, the install was very neatly done
Great execution of a terrible idea
Prety sure that was 600 watts at 24 volts (maybe12?), what you are describing sounds like a portable house AC, which runs at 120vac.
I've never seen an ac that pulls less than 1500w (maybe 1300), plus the huge startup draw. Maybe some really expensive camper AC units, but I think most of those are 1200watts.
@@sumiixIve looked, good luck finding a sub 1500w cheap window ac unit, I don't think they exist.
@@Dan-yk6sy i have a cheapo chinese portable unit, 2.5kw cooling, it uses a lot as a surge at startup but once it is running it settles down to under 500w once everything is up and running
Great, love your attention to detail. I had thought about something similar, but in reverse, to tap extra energy.
How about use bigger radiator
Faster transfer heat
Higher efficiency
Very ingenious and clever bit of engineering, but overall a very inefficient source of cool air.
yes it's inefficient for cooling..
cool build, however efficency of a peltier-system is around 5% so you need humongous power to get any useful coolingpowerout of it..
Wouldn't it be cheeper to use a inverter and a home window ac unit and a lot easier and you would get a lote more cooling.
Awesome job well done but i build an ac with peltiers but its not very efficient i suggest use compressor system which is more effective and consume less power and generate better cooling
Someone better sign this mans PHD`s from Harvard, Yale, and Stanford in afro-engineering cause this dude is McGuyver
McGyver
McGruber :)
McDonalds
560w/12v=46.66A? Can the alternator handle it?
I DO like the design, very creative. Good Job👍🏻
In reality, he used 24.8 volts, so the amperage is approximately 23, but experience shows us that it is worth doing it and eliminating the problems of the compressor?
The outlet temperature of an AC cooler is about 4 °C. There is still a huge difference.
Cheaper to buy used car with air-conditioning, but nice project.
You may want to use a gas compressor that only works when the car is moving? it surely will be more energy efficient. I loved that little electric car. LOL.
Wouldn’t be a bit easier, and possibly achieving the same result if you would have used 6 240mm cooling blocks? I was thinking about this right after watching your video. I think it would simplify much more your project and achieve similar temps.
Id like to use this in my bedroom! much quieter
..until the energy bill drops like a sledgehammer on your wallet 😉
@@Paxmax at 600 watts still less then a window AC unit
actually 25-27 C degrees are comfortable for me. thats really works! good job
it actually is cheaper to run a traditional AC than any amount of Peltier cooling alternative.
Problem with peltier's as fun as they are to f--- with, they use a massive amount of energy compared to other options.
Edit: Ok, Sorry, Now later I realised by other posts you used 24(!) TECs! That does change the picture slightly, so my estimates where based on 12 TECs, arranged as 6 pairs of 2 in series. Efficiency will be higher with 24, but I don't think it changes everything radically, anyway I should stop speculating without adding 12 more TECs and check the datasheets how it impacts calculations. Ok, now follows my flawed original analysis / post:
uuuuuh... you know you can calculate an estimate of the cooling power before starting the project?
You use ALOT of power, but the cooling power is in how many watts it can continuously transfer (from cold to hot side) while maintaining the hot side temp at a reasonable temperature.
So, I generously in your favor first estimated a hot-side of atleast 50C ...but considering the somewhat "low" power usage it's probably an indicator of quite higher, maybe like 65C TEC hot side. So, pulling 600W, at best pumping 250 to 270 W or so.
Uh-Oh! Naughty rascal! I caught you! You did a little "bait and switch" with the "after 15 minutes" video clip showing 20.4C. That 15 min was a blatant lie, it was probably the next day after a nights cooling. Just check the change in shadows, what direction they move in? Time is clearly at an earlier time of day than first video shot.
Besides, to cool a car that quickly, 10C in 15 minutes, would require a compressor with probably 3000W capacity.
There are no free lunches with TEC's, they are horrible devices for larger heat loads requiring >100W pumping capacity.
Good effort anyway, Looks really cool tho.
Hello, your project is very nice. However, I think that systems made with Peltier are very low in cost and efficiency. Instead, it would be more efficient to choose refrigerator-type cooling with a 12v aquarium compressor and copper pipe.
those videos are not real.. they don't give even 1C cooler difference..
so ,this being your second version ,did it work better than the first ,the first seemed to have destroyed your engine bay by the looks of it,this one didnt work that well either did it ,for the effort,peltiers just dont ever work the way you want them to ,cheers guys
I would have bought two more radiators and put peltier directly on it, because more water flows through a radiator than through an aluminum block...In my opinion
Its a good idea but peltier consume to much power more than compressor
Aus meiner Klimaanlage kommt 12 Grad kalte Luft um den Innenraum gerade so zu kühlen, mit 20 Grad dauert es Ewigkeiten. Allein die Sonnenstrahlung durch die Scheiben schreibt das Steuergerät 3000W Sonneneinstrahlung gemessen durch den Sensor. Eine Kfz Klima hat 28000Btu Leistung!
be nice if there was a build of materials that was used in this video, not everyone has these parts laying around
Very good! A RV / motorhome 12 volt electric AC pulls at least 1300 watts, electric motor running a compressor pump.
ye but 1300W in a ac compressor has atleast 3000W (probably more) of thermal moving power, peltier modules literally will only move about as much as they pull
exactly what the dude above says. 1300w on a compressor may move 4000w or more. my AC is 3500w (12000 BTU), 1000w consumption
Why is it impossible to find an ac less than 1500watts? Especially with all the tiny homes and off grid cabins you'd think there'd be some Chinese 600 or 800 watt AC units for off grid or something.
@@Dan-yk6sy Reasons would be a house leaks in heat in the summer, and outside the house the heat is coming down at an avg rate of near kW per square meter during sun hours. To cool something, in summer with a puny compressor you basically need to be living in a large well insulated walk in freezer. Problem is you will need a constant supply of fresh air as not to be asphyxiated = warm air (with moisture) will be forced in, pushing out the cold air. That is an added heat load on compressor. A human is generating heat by just being there, adding another 100W or so per person IF they are at rest, any phys activity will instantly add a higher heat load. Any equipment in the "cool room" will emit heat. Computer / Laptop, monitor / TV, lights, tea kettle, cellphone chargers, stereo equipment etc. will add more heat load.
It gets a little complicated, beyond the overheated person. To get efficient cooling capacity you will need a split unit. These mobile rolling indoor "all-in-one" room AC are all terrible. Main reason is that the unit is pumping out cold air from room thru the hose! The hose is also warm, leaking heat right back in. The massive AC compressor heat is present in the room! A split unit, all that compressor heat would be separated and outdoors, no forced ventilation, room for more effective heat exchangers. Usually the power OMPH is needed to catch up to an already warm house, to repel the heat stored in roof and walls + cooling the air. Once room is cold the power requirement will drop significantly - here is the next advantage, modern split units (in Europe atleast) most has inverter speed regulated compressors, avoiding the clunky noisy start stop routine! Once it has caught up it just goes much slower raising overall efficiency.
@@Dan-yk6sy But hey, for what it's worth, the micro AC is something I'd like to see too! That should be available for those that only wish to cool a bedroom or something. Ha! Should call some DIY- / HVAC guy that converts a large fridge from junk yard to a split unit! Probably a hell of a work to liberate it from fridge.. maybe focus only on the thermostat and compressor. Then buy the pipe works and heat exchangers. To keep cost down, make it rugged it will probably be an on-off regulation, but a fridge compressor outside doesn't make much of a noise.
Use old refrigirator pump make copper coils and fan blow into them and power inverter 12v to 220v. At 400w use you will get more than kilowatt cooling power. Peltier have small efficiency and from power used you get an fraction of cooling power
Give some hot paste to make conduction more efficient
Nice.Thanks for sharing. Are you happy with it?
Sir, very well done. Excellent. But why connect 3 Peltiers in series ? Won’t the voltage get divided and the Peltier cool less?
optimum current draw.. 2 in series more cool more watts but for efficientcy try your self..
with the road that close to you 24 hrs a day no wonder it drives you mad enough to acheive this amazing engineering. Did you build the entire car?
great video. pwede po matanong san niyo po binili yung pcb for the thermocouple? or yung parts po na nagaaccept ng AA voltage
Downside of using peltier is the amps or power that it draws and not crucial on hot weather lol
I love it! Sorry if i missed it,what was load current?looks like you used 30-40 amp relays? Is that correct.awesome job!😃
its a bit expensive but how about replacing your aluminum water blocks with copper. it should increase thermal conductivity. also why not use distilled water instead of coolant?. i mean you risk boiling or freezing water. but thats why you have heat sinks and giant fans.
Copper can react with water.aluminum is better
That will work if you have a 1000 watt generator in the trunk. Peltiers have their place but massive heat transfer, like is required for aircondition is way out of their league.
Ese es uno de los coches chinos que envian para armar como muebles de IKEA?
如果功耗达到600W的话，这个制冷效果有点差。用热泵更加好
Nicely build, nice cool car... to bad you had to remove the engine first 😂
Brilliant! Thank you for sharing this informative video. Greetings from Madang, Papua New Guinea!
Ah! from a small dot in the Pacific ❤. How is life there?
@@CtrlAtlDel It's great!
They make these things called COMPRESSORS. This system will spring a leak in no time and probably burn up the car.
Peltier is just for electronical chip cooling for very limited spaces. Peltier doesn't make any heat gain. If you use compressor and refigirant gases you get as high as X 4 cop values. 600 w is very high power for batteries. This is only conceptual system we electronical engineers use peltiers to cool our chips more than 40 years
Some Chinese company needs to start making some 600w or 800w cheap AC units for off grid and redneck projects like this. The smallest cheap window ac is always around 1500w.
Compressor AC 10times more efficiency than peltier
yes that's true..
no freon .. 🤤 but can subtitute it with propane or LPG
Solar panels are not efficient but direct connected to this peltier A/C perhaps Fridge too could save battery power.
this is easier to retro fit into a mini-truck that never had ac.
This peltier unit would be useful to generate electricity from waste heat in an AC unit or the engine radiator.
Def cooled down inside 🚗 👍🏼
Salamat sa pagbahagi sir.ok rin yan dahil mahal ang gasulina dadag cunsomo sa gas pag compressor belt driven ang gagamitin
Good idea but use too much energy and car's battery very soon get broken....
This is good for home air-conditioning because there you don't have limit for energy
Yes, you are right, it's good for camping when you have extra battery and you need ac
For a car, the motor should be always running since the alternator is supposed to power the A/C and not the battery actually, unless you have an external source.
TEC1-12706 (12v 6A)
24x 12v 6A (72w) TECs
Thats 1'728w
on layout 3s 4p
So that is then 36v 24A (864w) per XT60
So need 36v 48A or 72v 24A power supply
But your running it on 12v and have relays to switch 2s from/to 2p mode ?
Basically running it at 1/3 power or 1/6 power ?
If I understood it correctly 🤔
So sacrifice power to efficiency
If I remember correctly at full power those modules are like 5% efficient at full power
But what is the efficiency at 1/3 or 1/6 power?
Tengo la misma duda... Como llega a los 24V?
Peltiers are more efficient at around 50% power so you can get the same cooling using more of them at lower voltage.
Just hook an ac compressor to the engine and do it right then you will blow about 5⁰c like it should be....
Ang galing nyo naman sir. Sana magawan nyo ako ng ganyan din para malagay ko sa sasakyan kong e-car. Salamat.
if you are running a combustion engine in the back; I think its best to try and connect a regular car compressor..
ps the hotter it is outside the more cooling youll get as it trys to normalize the inside and outside ,also once the car is moving that will help,also im unsure if those water blocks have the correct type of fins inside for heat transfer like cpu water blocks made of copper
Wrong! more heat outside means less cooling.
ok,yes i worded that wrong i ment exhaust that vents the hot side out,the hotter it can exhaust the colder it will get,,i wasnt paying attention was wondering what happened to his car
wonder if stacking them might help in that project ,stacking seriously increased peltier fridge conversion we did few years back
@@angusmcgil This system is terribly inefficient for using as an air cooler. This guy has like 24 of those peltier modules which draw a lot of power, while providing minimal cooling. While it works for the sake of a TH-cam video, it's impractical.
yeah we know that,but hes having a go ,hes being creative in his reality and efficentcy isnt allways that important@@Engineerbroofficial
How many watts does it use? How many BTUs does it output? Thanks
560w 7:11
hehe, it consumes 600W and at most it outputs 900BTUs (i.e. 270W of heat pumping)
nice, but what does it use for 12 volt power source? not the car battery.
Tough fight..
AC Compressor:
- Typical efficiency: 20-40% (COP: 3-5)
- High-end models: up to 60% efficient (COP: 6-8)
Peltier Cell:
- Typical efficiency: 2-5% (COP: 1-3)
- High-end models: up to 10% efficient (COP: 4-5)
Key differences:
- AC compressors are 4-8 times more efficient than Peltier cells
- AC compressors can achieve higher cooling capacities
COP (Coefficient of Performance) measures the ratio of heat transferred to electrical energy consumed. Higher COP values indicate better efficiency
What is the manufacturer name of that car? I am really interested in it sir.
Hallo, das ist ein sehr sehr schönes Projekt.👍👍👍👍.
Bleib gesund.
Viele Grüße aus Sachsen Anhalt in Deutschland 🇩🇪
Stacking the coolers: But wait, theres more!
Great ! But how long can the Peltier effect module work without damage?
About three fiddy
@@frederiquerijsdijk thanks
@@charlesgbantehou4458 Always ready to help!
If you use soft power ramp up and ramp down it will lessen the mechanical stress greatly. Amount of cycles impacts alot. With only a few soft cycles per day it could last way over 200'000hrs according to some datasheets I've gleened at. I would also surmise that using it at really high DeltaT will also present as a constant stress on the several hundreds of internal solder joints.
@@Paxmax thanks
Cool (pun intended) demonstration of your skil in building.something. Hopeless at AC power vs a common hermetic system but aside from the circulation pump there are no moving parts.
👍👍👍master peltier
What is the total amperage?
ha ha ha ha, what a power consuption. 36 Peltiers multiply with 6Amp = 2800 Watts or Approx 3KW of power means brand new engine will need to be replaced after 2 months
I need some air conditioned boots for the hot Georgia Summers so I don't barbecue
how can I contact you? And if you install a 24-rod pelt 12703 at 3 amperes, then the power will be two times less? I want to set it to 12 volts. Does the thermostat maintain the set temperature in the cabin?
Lots of lightning, really cool
That is better than some idea of french engineer (Renault for example :p )
you can you small 12 v compressor 200 or 300 watt
That took some knowledge and skill
But why not just make a swamp cooler setup with a 12 volt refrigerator for a fraction of the cost
The question to the designer is how many amps does it take.?
vs inverter and refigerator or home freezer.. just open the door add fan .. for simpler
AC, with NO moving parts, short of the fan.
Cool.
so.. a car without engine? it is just like an icebox?
Great job. Keep up the great work.
Flip flop stamp of quality!!!
Is there something very small (and quiet) we can do to keep amplifier cool and not over heat?
-Very large heatsinks... passive convection- sorry, forgot the small part. Other solution would be undervolted fans held in place by soft suspension as not to impart vibrations into HIFi box.
@@Paxmax 🙏🙏🙏🙏 would it be possible for you to make a video about it?
560watts? My 9k mini-split only consumes 180-300 watts once it reaches temp.