Space Powered Cooling May Be the Future of Energy
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- เผยแพร่เมื่อ 27 ก.ย. 2021
- Space powered cooling may be the future of energy. Our cooling systems are heating the Earth as they consume fossil-fueled energy and release greenhouse gases. Air Conditioning use is expected to increase from about 3.6 billion units to 15 billion by 2050. So, how do we exit this cold room trap? What if I told you we could tap into space for electricity free air conditioning and other refrigeration tech?
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But what do you think? Does this sound like promising tech? If you're interested in purchasing the RoboRock Dock go to Amazon: cli.fm/Roborockdock_matt_YT_Amazon or visit RoboRock's official website:cli.fm/Roborockdock_matt_YT
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This is animated explanation of how wind turbine work
Sounds cool but what about water uses from us we use to much for simple things
The technology that I'm interested in making would be a paint that would change based on the ambient air temperature... If it's cold outside then it will be black and absorb this heat from the Sun and if it's hot outside it will turn white... This would be a revolutionary idea it would save massive amounts of money on heating and cooling costs. The hard part would be the materials science behind constructing this product.
Honestly this is a trash company you're talking about here because the problem is that our air conditioning systems and using a compressor is absolutely is an astronomically insane waste of energy to begin with. Anhydrous ammonia refrigeration system would be far more efficient with a solar panel array... Honestly this is just crap bloatware because this doesn't create any extra energy. If you want to save money get rid of your inefficient compressor cooling system all together! Ultimately this system that would take up the place of solar panels creates no energy! It's pretty much garbage! Massive waste of money and total garbage.
Again the problem with cool paint is that it can't change colors based on the temperature if it could switch from white to black based on the ambient Air temperature then that would be revolutionary. This is what needs to go into production this is what someone needs to spend their money on producing. Spread the information please.
Simple reflectivity can produce amazing results. I bought an older house in northern California which had a nearly flat tar and gravel roof. An absolute oven in the hot months. We air conditioned it; all was fine. Then, a year later, had the roof replaced with a white polymer of the type used on commercial buildings. (Location and design made it invisible to neighbors.) The air conditioner never ran again.
Great comment. The problem will not be solved by a silver bullet. It will be tons of small solutions that add up.
Thank God you thought about whether your neighbors could see it. You have to be careful with reflective surfaces because they can be hazards. I remember the white roads debacle that resulted in car crashes from sun blindness. I wonder if they've considered the effect on air traffic with some of these proposals?
@@russiannpcbot6408 the light is reflected diffusely, so it won't be reflective like polished chrome or a mirror. It will however be so white it's difficult to tell where the corners are, and it should practically glow in the dark
@@alexandercoggins2779 No shit Sherlock. Highly reflective white paints can still cause eyestrain from prolonged exposure. Normal white paints typically don't.
Try piloting a traffic copter in a city will all reflective white painted roofs. Staring down at that will cause eye strain. A plane angling to land could have issues as well. Especially single prop ones.
@@russiannpcbot6408 No shit Sherlock. Directly reflective metallic structures are already all over the place, calm water is highly reflective, and that's why aviation eyewear exists. No need to be an asshole about it.
Reflectivity is one of the ways to reduce heat build-up in the automotive industry. As a shade-tree mechanic that is always tinkering, I've used stuff like white ceramic coatings to help reflect heat away from things like piston and valve heads/tops, as well as pushrod tubes in VWs and my Corvair's air-cooled engine. The auto manufacturers used to paint the tops/roofs of cars white for just this specific reason - heat disipation/radiation.
What I like about these videos is you give the balanced view and show where the tech doesn't work as well as where it does. Gives me a higher trust factor that I can believe the info.
This system sounds like a potential winner for commercial applications (data centers, supermarket refrigeration systems etc). For residential application, especially in desert/tropical areas, combine this with geothermal since if your geothermal loop is buried only 10 feet down that would give you a constant cool source of circulating fluid.
Two years ago (while replacing shingles) we also replaced our roof deck boards with radiant barrier roof decking. We noticed a significant reduction in attic temperature (97F at noon in July), and our HVAC system runs significantly less. That's on the Gulf Coast. Passive radiant barrier should be required in all new home construction - and I highly recommend it to anyone looking to redo their own roof.
@yo yo The difference in cost between "standard" and radiant barrier deck boards is insignificant - considering the labor costs are the same. At the time we installed the new roof, the difference in material cost was around $350.
It's really a no-brainer to require it for new construction homes. 💯
One thing most smart people don't realized is that Government needed the tax revenue from inefficient system to pay themselves high salary base on the job they actually do. Most Government would never take a pay cut. Innovation are everywhere but no Government is willing to go bankrupt to save the world.
FL home owner here, we were looking at solar, however it makes more financial sense to just get tin roof installed. ROI much faster
As a Master Refrigeration Mechanic of over 40 years, this would be a great start to significant energy reductions..
The largest heat gain and loss is always the roof of every structure, residential and commercial.
Brilliant suggestion.
@@christoney2491 the only caviat I would add to that is location. I have no need for air conditioning but appreciate all the help Sol can give me when it comes to heating.
The thrust of the phenomenon is clearer at the beginning of the video -- that there is a bandwidth of the EM spectrum where the atmosphere is clear to space, w/o transmission impediments. The first product seems to be directly using that effect.
The subsequent products just seem to be ultra-efficient sunlight reflectors.
As long as the atmosphere isn't full of water vapor, greenhouse gasses, volcanic ash or wildfire smoke.
If we had an efficient way to shift the wavelength of incoming solar radiation, we could double or triple PV output.
@@jimurrata6785 Polarization?
@@shawnr771 Not really.
Just that all those things will absorb infrared, so it heats the atmosphere and it won't make it back into space.
@@jimurrata6785 thanks.
@@jimurrata6785 space mirrors + fluorescent (in the right bandwidth) crystals?
Here in the Netherlands most flat roofs are black tar-based. I think it would be a great idea to paint those in a reflective coating or put these panels on them to profit from the shadows they cast.
living in South America this all sounds very useful. especially in my shop where I have 3 fridges 3 freezers and 4 aircons.
It would be nice to see supercool panels as overlays for silicon solar panels. If the supercool rejects IR, but passes visible light, you'd get cooler, more efficient solar panels and a cooler house at the same time, and also getting dual use of every square meter of rooftop space.
There is a significant design challenge in there. It is not enough to transmit visible light, rather you have to also transmit the near, short and midwave infrared up to 8 µm. And also the UV light. And then it has to have a very high absorption in the 8µm to 13 µm range to emit heat efficiently.
And transmission can not really be achieved by multi-layer technologies like reflection can, so you need to find a single bulk material that has the properties you want. There are some which can be close to perfect, like ZnS. But that comes with a high reflectivity per surface as well, so the combined transmission for the visible light is only about 80%.
Also the backside of this material is now in direct view of the solar panel, and gets heated by that. So there are a lot of aspects that make your concept much less efficient than you imagine it to be. Sorry ;-)
or build solar panels to run these, if they needed pumps or something - run solar panels during the day and run the coolers at night, you'd get at least a few hours a day of cooling - there is plenty of land area in the deserts that could be used. Millions of acres.
@@ShieTar_ Any radiation below the 1.12 eV silicon bandgap just heats the solar panel. Yes, the supercool panels will reradiate towards the solar panels, but that reradiation will be isotropic, so there is a factor of two less hitting the underlying solar panels. Technical challenges for sure, but not quite as bad as you suggested.
they need to pass water in the solar panel to generate electricity has well as cool them and store the heat from those panel in tanks like the regular heater tank. they already do water only solar panel but I never see both combined... Btw solar pannel use some part of the IR so you can't block it
What a great idea! I wonder if you could turn off the pumps to let ice build up on the panels during night, then run the pumps + solar heat to melt the ice during the day, creating a water generation system, a thermal battery, and maybe making them partially self-cleaning or at least protected from dust buildup during the night, which is a significant part of the panel's lifespan.
Interesting. So I put solar panels on the south side of my roof and skycool panels on the north side of the roof?
Maybe it will be possible to use something like this as the base layer below a solar panel. All the unused light gets reflected back into the solar panel and then into space.
This might just work.Set a third of the skycool panels up to cool the PV, the rest to cool your AC compressor.
That would be my thought too.
The roof real estate on the north side of the house would easily be best used for this application. Trying to combine hot photovoltaics with a cooling system seems unlikely from the standpoint of physics.
@@P8qzxnxfP85xZ2H3wDRV will complicate the solar panel now that the cooling panel is beaming heat into space, through it
The Yakhchal Ice House 3:24 is an amazing passive technology. Using modern insulation, ice can be built up in the winter and used throughout the summer. Even mobile ice cores could be produced.
Below-ambient passive cooling sounds like magic to me. If it really works as well as stated and is sustainable over a cost-effective period, I'll be highly excited.
Would be nice to hear about the maintanance. Anything which relies on being reflective will suffer when it gets dirty. How often do they need to be cleaned and how much is the reflectiveness harmed by the surface damage that you get from existing?
I mean, the surface can just be made out of glass or aluminium oxide, which is super durable and scratch resistent, but can also be coated in superhydrophobic substances or surface textures, which would basically clean themselves. And they would be pretty stupid, if they didn't include these things.
@@midnight8341 any additional coatings might reduce efficiency by blocking IR. Also I've seen enough startups that just exist to spend investments and produce nothing. Do you remember solar roads?
@@CockroachSlidy The surface of the material itself can be etched into being superhydrophobic. Of course, that may reduce efficiency itself.
@@CockroachSlidy In fairness, Solar roads was always going to fail, for a multitude of practical reasons. Rooftops, however, are free real estate (so says the meme). The barrier to solar roads was practicality, the technology was well established. The barrier to practicality to this is much lower, as circulation systems on rooftops have existed for some time. The barrier here is manufacturing.
@@CockroachSlidy okay, silicate glass is opaque above 5μm, so not practical for our applications of 8-13μm. But aluminium oxide is completely transparent in that range, so the ceramic your phone screen is made of would be good enough for this application.
This technology could and should have companies that pay for AC or refrigeration queueing up to save money. They're unlikely to care about the ecological benefits but no one can ignore the bottom line savings.
@@rogerstarkey5390 yep idk why they always keen on subsidising fuels instead.
Matt, well done. I think this is quite a find, and that it has proof-of-principle been demonstrated, GIVES ME HOPE. Thank You!
Thanks for covering this!!!
11:10 I mean that's still as good a solution as any. We'll need every tool we can get, and a way to passively cool the earth with a paint is not insignificant, even if we can only cover 0.05% of the earth.
especially on glaciers to keep them from melting, its already an idea thats been floated its just impossible without international governmental support and funding. Maybe they will finally get around to starting it after its already too late.
FYI, he said 2% which is just under 4 million square miles or about 10 million square kilometers or about 3.5 trillion 4x8 panels.
Matt, while highly reflective paints appear to work quite well in controlled conditions, I suspect that airborne particles (dirt) would quickly degrade performance of these paints. This would be especially true for matte (no pun intended) / rough surfaces. Smooth surfaces would likely better retain performance in the same way the smooth outer surfaces of solar panels rinse off easily.
Yup. Plus it would make the light color in house roof kinda ugly much faster than slight darker color. In tropical places ike mine we just make insulations in between our ceiling and roof. It could help in much colder places but Im sure the weather will just destroy it nontheless. Maintenance will be a pain in the ass for a longtime too.
same as normal solar, some periodic clining should solve the problem as sooth acumulates
Sure, but the paint can be a much, much cheaper solution than reflective surfaces based on a multi-layer coating design. So there will definitely be plenty of use-cases for it.
Making it hydrophobic would make most dirt fall off.
@@filonin2 wash off, making something hydrophobic does nothing for dirt and grime it requires at minimum for some rain to fall, and even then not all hydrophobic coatings allow for that to work too, and almost all of them are exceedingly toxic
we changed our Queensland home roof colour from a dark red to an off white and the difference in summer is very noticeable. Always surprises me how many people have dark or off black roofs in a hot climate.
Fascinating Video! THANK YOU!
Here in Florida my electric bill triples in the summer, so any improvements in AC technology is welcome
This technology is aimed at the commercial market first. Home applications are probably 10 years into the future if at all.
I would look into renovating your home.
Adding insulation.
Replacing windows with better ones.
Adding awnings or increasing the size of the overhang on the south side.
Keeping the south wall in the shade on hot summer days when the sun is high in the sky.
Putting awnings over windows that have a lot of direct solar gain.
Look up Passive Solar design.
Many of these elements can be retrofitted into a house.
Use this on the cool side of a Sterling engine and the heat from the back of solar panels for the hot side of the engine. The engine could then run circulation pumps. If it works it should make the solar panels more efficient and last longer.
You should contact the developers with that idea.
big brain time
Why not just directly powering the pump with the power generated from the solar panel instead?
This way, no energy is wasted.
@@RedCocoon the Sterling engine draws no electrical power from the panel. Using the power from the panel decreases the power output of the panel to the grid which defeats the purpose of this technology.
Too small difrence between those surfaces for sterling engine to work.
I was happy to se the low .3 for data sinters. I thought it was way higher. This channel by fare is the best. TY supporters, researchers and for this channel for bringing this info easy for me/us.
I've been holding out on getting an aircon for a long time. I find this to be a very attractive option. A few degrees cooling in my house would make the hot summers where I live quite bearable.
I read the summary of the original research about 5 years ago. I've been waiting since then to see the tech commercialized. It also has application for space, and is just one example of the potential of metamaterials and advanced materials technology in general, as well as the impact of multidisciplinary cooperation.
Given the early stage of implementation, significant cost reductions can be expected from further optimization. It is also amusing that widespread use would shift the earth's collective radiative signature slightly toward the Karishev 1 profile.
Excellent content, always! Also it's the first time I didn't skip the sponsorship! I'm actually going to the cleaner. I never knew somebody had released an auto empty version!!!
Over a month ago I had my 1500sft S Florida roof (open beam ceiling) coated with silicone to a savings of 20%! and amazingly comfortable as it also reduces UV rays. Cost was $1700, savings was $30, meaning payback at that rate is 57 months, not bad, but the vastly improved comfort is well worth it too
So in Aussie you use a wet hessian cloth (like pvc plastic door strips) placed on your front and rear doors of the house or in a window. Does an awesome job of lowering ambient air temps
That was COOL 😎. Makes me want to walk around the buildings I live/work in and evaluate where this can help. The businesses in my city were supposed to contribute to ocean cooled system to replace AC, but I don't think that ever came to be. Thanks for the video.
I’m so glad you did a video on this, I watched a TedTalk years ago that mentioned the concept of “making the coldness of space a renewable resource” or something like that and hadn’t heard a thing about it since. I was wondering if there were attempts to commercialize this tech, now I know.
Same! I was so excited by the TED talk. Glad to hear they're still working on it!
This is investor bait. We've been using radiative cooling panels on Skylab and the ISS for decades.
"Everything old is new again!"
@@PatrickKQ4HBD The innovation is the coating that only transmits in the "window" band and reflects the rest. You don't need to do that if you're already on the other side of the atmosphere.
Yay! You didn't repeat yourself at all this time! I can't help but feel that you are listening, and I want to thank you.
This was an interesting topic, too, and not something I was previously aware of, so thank you also for that.
Thank you more people need to know about this tech!!!
There is hope, people. Amazing stuff.
Sounds like a fantastic tech we need to embrace! Every warehouse should have white paint on top with solar panels and these radiative panels.
If these panels cost more money to produce than they end up saving then they're going to need some improvements before they'll be used on such a wide scale.
Fascinating! I never considered that radiative cooling would be so effective in our thick atmosphere! Down on the ground, we're more accustomed to conductive and convective cooling!
Good stuff every time, Matt. Thank you.
You are really good at this Matt. Keep it up. I love your videos!
I can imagine alternating rows of these panels and solar panels, with the solar facing the sun and, backing them, the radiative panels facing away from the sun. On a flat roof this could be viable.
Could also run the cooling tubes to the solar panels themselves to cool them down and improve their efficiency.
As an owner of a flat roof.... this is basically what I was picturing too :)
@@kelvin2739, either way. It would be interesting to see the results of those tests.
The panels need to have a direct view to deep space on the majority of a semispherical plane. If you tilt them "away from the sun", the will necessarily see the earth (or other buildings) in a lot of their viewing direction, and thus will be thermally coupled to those objects instead of just to deep space. And this can degrade their efficiency very quickly. I'm pretty sure that you won't get any significant cooling out of them if you place them at an angle of 30° or larger from local zenith.
@@ShieTar_ I am suggesting a tilt such as would optimize the efficiency of solar panels where the sun is not directly overhead at zenith. Usually this will cast some shadow behind them which is ‘lost surface’ for electrical generation purposes. Placing the cooling panels in this location would not necessarily require that they be tilted also, just that they occupy the shaded area. To maximize the use of the area for electrical generation an ‘acceptable’ tilt angle on the cooling panels should allow for a tighter configuration of the solar panels, especially where, repeated across the width of a roof, an entire extra row of panels might then fit. Cheers!
Very cool info Matt. Thanks. 👍🏻
For homes, the first step should be to insulate them better. Many homes in the US are very poorly insulated if at all. Insulation not only helps keep the home cooler during summer, it also warmer during the winter. Better and more stringent building codes are needed.
Good way to start off the morning. Thanks for the video!
Good morning! Thanks for watching.
When I heard "space radiators" I thought we were in for the latest "space elevator" sales pitch, with an added conduit for coolant circulation of heat from earth's surface to actual space radiators in orbit - like a planet wide, space-based split cooling system. 🤣 I guess that's next week's topic ?
That sounds more like a video for @Isaac arther Sofia
I was thinking the same, was very relieved to see it's actually within the realm of reality
You are the one usefull in you tube, we need someone like you
Thanks Matt. Awesomely informative & even handed as usual.
On a geoengineering scale, this could be paired well with geothermal cooling. Dump all the heat that the panels can't reject into the ground, then cool the ground at night so it's even more efficient when you need to use it in the morning. If you could also have these on solar panels that flip over at night then that would be awesome. Harvesting solar energy and dumping heat into the ground during the day, then passively pumping all that heat out at night. Maybe we could also bioengineer an algae that has these properties then release it into the ocean to cool the planet, then it would take care of the exponential growth.
To complicated solution that would be too expensive too operate. If you want something cost effective it has to be simple.
I was also thinking about an algae covering some parts of the oceans. But if it gets out of hand, it would be a trefying thing.
@@Dawid-kn6mv It could be done easily on a small scale, say for individual homes. If you can dig a hole say 5-8 meters deep you can run a pipe down there. I've seen people use this to liquid cool computers. The loop runs through an old oxygen bottle as a reservoir buried at the bottom of the hole.There's your geothermal cooling. Plumb it into a night-sky cooling panel loop and a simple heat exchanger to provide the cooled air for the home. Simple solenoid valves and temperature sensors can bypass one of loops (ground or panel) depending on relative temperatures, like bypassing the panels in the heat of the day where they're not cooling the fluid at all, instead just pumping it through the ground loop to pump that heat into the ground.
Materials don't need to be expensive or complicated, so could easily be a cost effective supplemental cooling solution.
@@shinjisan2015 Sounds good on paper but I wouldn't be sure about serious practice. I work with heat pumps and now everyone uses the air ones because using ground is too expensive and inefficient. It takes a lot of pipes in the gorund to extract or dump heat energy to the ground.
Maybe as DIY project for small needs it can have sense
Besides it doesn't fullfil the basic purpouse mentioned in the video of sending heat to the space. Instead of all this effort and cost it would be simpler and maybe even cheaper to buy aditional panels.
@@shinjisan2015 it would work great if you already have a downhole heat exchanger, a normal downhole can go down to about 200m
At first I was "meh" at the concept, less than 3 minutes in I'm hyped.
I had heard of this phenomenon a few years ago, and kept forgetting the taglines to reacquaint myself with it.
The fundamental effect is very intriguing, even to the point of a pseudo perpetual motion machine.
Insulation won't get heat outside of the earths atmosphere
@@GeeTrieste sterling engine could use the difference in temp to produce work
I like your sensible, level-headed style... and even better this video because there were not too many word association "jokes".
Love this tech. Thank you for your insight
Great information! Thank you very much for consistently bringing us the newest developments in various technologies. 2 questions: what happens to the reflective value of that awesome sounding paint when it gets dirty (and that likely applies to the panels too)? And for the really interesting reflective panels, would they suffer the same after-life problems that current solar panels do?
So these cooling panels don't need to face the sun (may even be better off not facing the sun), I see this as a great addition to residential rooftop PV panels. the south facing (for those of us in the northern hemisphere) roof gets electricity producing PV panels and the north facing roof gets radiative cooling panels
In Europe we switch to: 1) better insolated buildings 2) PV on roofs (increasingly on sidewalls too) 3) heat pumps 4) using soil and drilled holes for Source of heat and for cooling in Summer (no heat pump used)
We (when l was with a engineering consultancy) were ask by a Client to assess SkyCool paint on a major retail project. This was back in 2005, in Australia. We concluded that it was not a major improvement over white paint...... much like what stated on this YT.
Anyway, it's great to hear the technology has progressed to be likely viable on a large scale.
Matt, thank you for the great content and bringing to light some of the amazing research that is being done.
Would it make sense to combine radiative cooling with a heat pump or a/c unit? It seems that raising the temperature of the radiative cooling panels should increase their heat transfer capacity. This could make air conditioning much more efficient in hot climates, versus a heat exchanger transferring to air at 100 degrees Fahrenheit.
evaporative condensers work better and are way cheaper. But, california won't conserve water and lets it all drain out to the sea.
@@NathansHVAC
All water drains to the sea or evaporates on site.
yes it would
My sentiments
@@nicholasgardiner9601 aquifers would like a word with you
i was always using in my home in poland thes "space cooling" during hot summer months, i just makes ton of sense to open windows at night when its nice and cool and close them early morning to prevent heat from getting inside, its, free it works and i never felt need to get any kind of space cooler for my house...
Very interesting. Thanks for making the video.
This is actually amazing, mainly due to the fact this tech is already hitting commercial application to a degree. Im definitly curious about the lifetime and upkeep of these reflective techs though, since this sounds like its working off of thin-film interference, or something similar
Every little step towards a cooler planet is good, even if it's very small. Also, I wonder if it's possible to combine these with solar panels. If you could reflect the infra-red radiation while collect the other useful solar rays then you could get a passive cooling to your solar panel, thus improving it's performance.
Not if it takes resources away from other, better measures, or even causes pollution in the process of making it in the first place. I wish it were that simple, but it just isn't.
But more people are killed by cold-related factors (vs heat-related). So doesn't that mean that the earth getting colder would on net produce more deaths?
But what temperature are we shoot for? What is the optimum temperature?
I put white shingles on my house. It made a big difference. He also said some people knew it would make a difference, but still choose not to. The installer said 1 of a 100 people do it.
Roborock is actually the shit! That little baby saves me so much time in cleaning. My place if fully tiled.
My respect towards the ancient Persians just grew now that I learned that they knew how to chillax with an ice-cold mojito in the desert.
It works with evaporation of water. Still useable in desertic area, not in humid and hot area
@John-Paul Hunt rrrrright.
This was really interesting. I was initially concerned by reflectivity as a cooling solution because it only works in climates that don't experience serious winter (since it negatively impacts temperature control needs in the winter), but this looks very promising. Another thought I had about the panels is that if they were reversible, you could flip them around for winter, and use them to absorb heat, perhaps? It's a very cool idea though, and like many ideas, it's probably "a little bit of this and a little bit of that" that we need to solve the climate crisis.
space has no temperature to draw upon.
@@fss1704 huh?
Holy shit. That diagram with the cooling power usage is unreal. The entire EU is barely visible, while the US in 2016 is already eating up over 350 GW just for cooling. What are you guys doing over there?
There are a number of new heat pumps based on CO2 as the refrigerant.
These are mostly for creating DHW and space heating. But could easily be used to create cooled fluid to be used for space conditioning.
The system shown in the video was billed as passive. But I would assume that for the commercial refrigeration system presented there would be a heat pump between the refrigerators/freezers and the cooling system presented.
The same could be done for houses to attain larger temperature differences.
Now, if there was some way to have the radiators change from emitting heat in summer and absorbing heat in winter you'd have a great addition to heat and cool houses.
Link one skycool panel with 3 PV panels to cool them. This will result in an increase in PV power ..
Maybe, but you are now not using 1/4 of the available area for PV, and the efficiency gain is only a few %. Only makes sense if they become much cheaper than the PV panels and you have much more roof-space than money.
When you say "tap into space for cooling" I get the picture of the earth turning into an ice ball.
There goes all of that nice warmth :)
As a University at Buffalo Student, glad to hear we made it in the video!
As someone who lives in south east asia.. Paint any roof white, it will not stay white more then a month here.. The rain and humidity, in combination with pollen, dust, mold and automotive exhaust will have it brown before the year is up..
Use heat differences to run Stirling motor or thermal to electric convertor..
While possible to do that there is likely no benefit to it. The big advantage that these panels bring is that it is not necesarry to transform the energy to another form and thus there is no loss during that transformation. Warm fluid in, cooler fluid out. There is only a low consumption circulation pump to make the fluid go round.
Sounds awesome.
It's pretty cool stuff 😜
Very exciting for data centers and home cooling both.
I was on a bridge in downtown Seattle looking at white roofs which had become filthy with environmental pollutants such as soot, dust, and forest fire smoke. Originally brilliant white, they had become filthy dull dark grey within about two years. Even a heavy downpour didn’t rinse it off. Unless material is used that will rinse off in rain and/or the effort and expense of cleaning is factored in, white roofs would only be useful temporarily. I expect taller buildings would last longer but the discoloration would certainly occur but at a slower rate.
This sounds amazing though I would like them to test these technologies in the tropics or in high humidity environments where cooling is difficult.
Unfortunately this doesn't work as well in humidity because water vapour absorbs infrared
Saw a Ted talk about this concept several years ago. Been eagerly awaiting its arrival ever sense.
I hadn't heard about the paint. Hopefully someday soon they can implement this technology into clothing. I'd love to have a hat and shirt that were -5 degrees ambient.
Then you really would be cool
no one would want to be around someone wearing that on a sunny day
@@tribalismblindsthembutnoty124 More elbow room then. That's almost a bigger bonus than the cooling.
By building houses differently, one can use the natural power of water to cool the house. And evaporating water always comes back. A perfect cycle from nature. My apartment, in Amsterdam Old-West, is always cooler than the temperature outside, because it's build in an North-South orientation. So I don't get much sun. That used to be a problem for me, especially in the wintertime. By a thoroughly done isolation I solved that problem, but my apartment is still cooler in summertime than other East-West build apartments. And you've showed the centuries old solution by using water as cooling. It still works quite well.
a gradient of 10 degrees seems like it would be enough to power a sterling engine as a pump for the system, it would make the system overall slightly less efficient, however it's possible that the decrease in efficiency from the sterling engine is still less than the electrical cost of powering a pump via an electrical motor
Hi Matt... Checkout SolCold's cooling technology.. Really ground breaking
Thanks, will do!
pretty fake
this comment and Matt's reply just brings me back the old times of youtube, when the comments were really about chatting with each other, and the creator and giving tips or in this case recommending things to check out.
@@UndecidedMFRadiative sounds exciting.Matt, I'm looking to make a career change and interested in working in something to be proud of. I live in Northern Indiana so there are a few solar companies here that I want to apply for. Any blanket ideas for courses of study to be relevant? I'd also like to be a step ahead like what you discussed here. Any ideas would help. Thanks. Love your show!
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cool video...Can we get one about micro 3D printing and future of that??
Good suggestion
Once your floors are relatively clean you can empty the earlier non dock roborocks once a week or so. Don’t need the auto empty feature unless you are going to be away for extended periods or have shedding pets.
This is a good idea for large commercial buildings that need 24/7 refrigeration. Or maybe apartment buildings. If building from scratch, in-ground heat exchange should also be used.
For single family residential homes, white paint or white shingles should suffice.
I’m intrigued, but curious how much more effective this would be at saving power over just installing photovoltaic panels in the same space.
And what about combining the two technologies? I’ve seen videos before about multilayer and transparent solar panels, what about making this a bottom layer? You get a potential double pass of light through the photovoltaic layers and the “excess” light gets reflected instead of absorbed.
I don't think it's really possible to combine the two together as one panel, but using the two in conjunction can be a great one/two punch. One helping to reduce energy usage and the other other actually generating electricity.
Not only do solar panels produce energy, they use energy that would have been heat. It seems like a better solution. I mentioned that as well.
@@grantmccoy6739 Photovoltaics use a very small percentage of the photons that hit them- most of the light is still either reflected or converted to heat
@@Approximation ok. They are supposedly 15-23% efficient, which is actually better than just reflecting light back into the environment, and heating it twice. We are talking about global warming and power usage right?
I can't imagine that a bigger heat exchanger is more efficient than a power producer, even with the relatively low power output of solar.
Also, it's kind of funny how inefficient everything is.
@@Approximation I wouldn't say 20-25% efficiency is "a very small percentage"
And any energy "reflected back into space" is doing what these radiative panels do without needing a pump at all.
It's always better to reduce the cooling load by avoiding gain in the first place.
This coating that reflects 97% of sunlight... could this be used on the underside of solar panels like perovskite panels to reflect light back through to give those photons a second chance to move some electrons about?
Good idea?
They do this already! The rear electrode is usually metal, and reflective. Good idea all the same.
Love your stuff Matt!
Hi Matt . In Copenhagen we use cold water from the bottom of the harbourbassins, for hotels etc with central aircondition
just gotta say, I love what you're doing on this channel. There are so many promising ideas out there that could really make a significant impact on global warming. Imagine if just 1 relatively wealthy nation's government put their weight and resources behind each of these technologies, helping these companies fast track product development and getting them to market.
What I love about this one is that it pays back the energy savings in a fairly short time, and doesn't sound prohibitively expensive. Also around 3% of the Earth's land surface is covered by urban areas, and while that's closer to 1% of the total surface, it's still a good chunk of the 2% you mentioned. Obviously even less of that is rooftops, but still.
Maybe they can use thermal energy to help move the water in these panels.
Thermosiphon is the method you're looking for.
I think this technology has promise. We don't have air conditioning in our house and this past summer it reached 44C outside. It was 36C in the house! We also had a few power failures because the system was strained too much with all of the air conditioners running at the time. Those Sky Cool panels would have been a godsend.
Matt - this is profound - thanks for this one!
So what’s the disadvantage
I believe the IR 'pigment' is achieved by carefully controlled particle size, so it is just hard. That doesn't mean it will stay expensive once we get good at it. Barium is bizarrely common (in high grade ores too), but fairly useless, so while strictly speaking finite, if we got it thin enough to get a square km out of 4 tons, we could literally cover the earth in the stuff with just known good reserves.
The dependence on atmospheric conditions is probably the biggest issue. When the weather is clear it works extremely well, but for many applications (data centres in particular) reliable performance is more important than absolute performance. With a large thermal mass some of that can be offset, but it runs into some of the same storage problems as renewable energy. It also doesn't perform nearly as well when it is cloudy, which is an issue because that implies high humidity; when you want AC most. In arid regions it is extremely effective, but it is more situational than a simple heat pump to atmosphere.
I think the best concept must be making installation of solar panels on the top of building roofs mandatory to harvest the free sun energy and use a portion of it for the electricity needs of that building including air conditioning and selling the rest to the electric grid which makes a good income for the residents of that building.
Ive been saying this for years, solar panels should be mandatory on all newly built homes after 2025, there's no reason this could not be implemented. I know the oil industry might not like it, but o well that oil wont last forever!
because the cost of housing isn't high enough already, right?
@@ancapftw9113 i understand, and I agree with your point, but on the flipside my utility bill averaged around $300, post solar panels its around 115, so if you take that difference plus the advantage of smaller carbon footprint, its a no brainer, but im no economist, this is just my experience
@@mrsmith5320 I think even old homes must also have solar panels on their roof
@@ancapftw9113 the money you paid for solar panels will be returned to you in 3 or 4 years by average by the reduction of your electricity bill and after that it will be all benefit so you should look at in as an investment
It raises some interesting questions and bring some more ideas...
Thermal storage (like rocks) would be interesting solution for both cooling and heating, but it could be a bit of problem for big cities...
However, idea of roof as heat exchanger opens lot of possibilities...
Pop these on the north facing part of your roof and keep PV on the south. Power in, heat out, no sweat.
❤
I’m a new subscriber and I really love your videos. Can I ask if it’s possible to make a video about what could be the roads of the future? And if it’s possible to change it into something more sustainable?
asphalt is so cheap because it's a waste product from oil refining and it's infinitely recyclable. Not to mention it's very durable and pretty easy to lay down.
other potential materials like concrete aren't any better and will most likely be way worse for the environment
juhotuho10 hit one of the big issues: cost. Interesting suggestion.
That wavelength will work in the daytime, 20% more or less of night time use. Looking for tech to take heat from the daytime, store and beam back into space each night. The goal here is to send twice my daily energy back into space and do my part in cooling the planet. Great review of new/old technology.
Radiative cooling is the slowest form of cooling, to the point the main issue when designing spacecraft, is figuring out how to not boil anyone inside
Radiative cooling is the only available option in space
@@worstedwoolens that's referred to as conductive (solid) or convective (fluid) cooling
I suspect large orbital reflectors will be viable before covering the earth’s surface in reflectors just from a logistics and maintenance point of view. Orbital reflectors manufactured from lunar or asteroid minerals, that is.
plus those are basically just a big sheet of foil.
I agree in terms of a geoengineering project but if companies can save on energy costs for their business operations with rooftop cooling then they sure as hell will
I can believe that. When I was visiting Vancouver in 2019 the airbnb I was staying at had no air conditioning. It was like an apartment building. So basically you had to open the window at night to let cool air in (not that cool) and then at about 6am construction work was starting a block away at another building so you got woken up to shut the window as well as to keep the construction dust from making its way in. Then during the day the room would get really hot. Seemed like Vancouver is the same as Europe where they don't seem to believe in air conditioners? idk.
still waiting for the cooling paint to become available, so i can have cooler concrete pathways and driveway. it's supposedly just chalk, ground to specific particle size and mixed in correct ratio with regular pain/binders. as per most things, policy is needed to make any reasonable difference. most roofs in australia are painted dark colors, because that's the fashion trend for houses for the longest time. absorbs large amounts of heat that no insulation can fully stop.