Skip to comments.Cooling panel sends excess heat back into outer space (Eliminate A/C? Power companies won't like)
Posted on 04/16/2013 7:41:37 PM PDT by 2ndDivisionVet
Scientists have found a way to cool houses without air conditioning and without using any power at all.
Shanhui Fan, professor of electrical engineering at Stanford University, and graduate students, Aaswath Raman, and Eden Rephaeli, are working on a cooling panel that could possibly replace your air conditioner.
How? By radiating the vast majority of incoming sunlight into the outside world.
The structure basically does two things: It radiates the heat out in the atmosphere into outer space, and the device reflects sunlight to ensure that the sunlight does not heat up the device itself, explained professor Fan, a Ph.D. in physics from the Massachusetts Institute of Technology.
The device is a metal-dielectric photonic structure capable of radiative cooling in daytime outdoor conditions. The structure behaves as a broadband mirror for solar light, while simultaneously emitting strongly in the mid-infrared within the atmospheric transparency window. What that means: It reflects visible light, and also radiates heat back out with a frequency that allows the infrared waves to pass unimpeded through the atmosphere, back out into space. As a result, it achieves a net cooling power in excess of 100 watts per square meter at ambient temperature.
Furthermore, were told by the team that the panel will require no electrical input. Essentially, it will sit on the top of the roof of your house and keep you cool, even on the hottest of days, without drawing any power....
(Excerpt) Read more at venturebeat.com ...
Space: The Final Frontier.
Why take a shot at the power companies? Likely they’d find a way to make money out of this themselves! I hope it’s a genuine breakthrough. It’s Al Gore who’d hate this, because it aims warmth back out of the atmosphere!
Space: The Final Heat Exchanger.
Sounds like a technological solution for any supposed “Global Warming”. Chalk another one up to Technology.
Isn’t outer space actually beyond the atmosphere?
Sounds as if this is designed not only to cool the house, but to cool the planet to some degree. I’m not sure if that’s such a good idea.
Having a reflective roof makes good sense in the summer. But does it need to send the warmth back into outer space?
Maybe so, but I’d like to see a little more explanation of that aspect. Is there a touch of global warming fear there?
What about the space warming that will take place and alter the universe? Could be bad.
It sounds great but at 100 watts per square meter it would require a great deal of area.
I suspect it’s a scam. A simple Mirror will reflect back sunlight but it won’t make the house any cooler than the temperature of the air.
Horsecrap. someone in academia is looking to score a big grant from the green energy dummies at the DoE
“Shanhui Fan, professor of electrical engineering at Stanford University, and graduate students, Aaswath Raman, and Eden Rephaeli,...”
Damn the Irish kick ass at engineering.
Arab architects - before they went insane with islam and mosques and general gaga bs, were very adept at using natural cooling techniques.
Now Al Gore will have to stop galactic warming.
Well you’ll still need a way to dehumidify to house air. 70 degrees at 100% humidity is not comfortable unless you like saunas. Remember as the temp drops the RH% will go up until you have every cool surface in your house sweating including you and mold and mildew everywhere..
I bet pilots are going to love flying around looking down at a vast sea of mirrors reflecting the sun right back at them.
They will pine for the days of the occasional idiot with his laser pointer.
Same principle that puts frost on the ground when the air is above freezing. Space is ccccccold, and the ground radiates its heat to space (on a clear night). No reason the same can’t happen in the day.
Cthulhu will become angry and seek vengeance.
I’m as dumb as a box of rocks, obviously. I don’t get it: if the ambient temperature is 95 degrees (Florida summer), how is reflecting sunlight off the roof supposed to “cool” a house enough to do away with the A/C?
Global Galactic Warming!
We need to tax it!!
Let’s not celebrate just yet. It’s completely OBVIOUS that this will cause Universal Warming.
Romulans first. They are wealthy I hear.
It is time for some good old ass kicking of the rulers of the world.
Sounds like it might be a good way to bring on a glaciation cycle.
I don’t think we want to do that, no matter how much putting Chicago under a mile of ice appeals at first glance.
See my previous. We’re on the same page.
What happens when it is hot and overcast?
Basically, you are using space as a heat sink.
If, and that is a big if, it really is 100W/M, then that is actually quite good.
My math might be off, but for example my house has about a 1400 square foot roof (Larger actually, but from a top view, its about 1400 sq ft). That translates roughly into about 130 square meters. That would mean that a roof of this material could radiate away about 13,000 watts. According to this site (http://www.simetric.co.uk/si_tz.htm), that works out to about 3.7 tons of refrigeration. My house only needs 2.5.
For that reason, and others of practicality, actual system inefficiencies, and so on, I will file this, for now, in the "Too Good To Be True" file.
This contrary to what I have been led to believe. That is, the alpha, beta, gamma rays are short waves and when they strike earth, they elongate when they bounce back - that's why you're more apt to get sunburned on a cloudy day because they wont penetrate the clouds and therefore they resonate between the clouds and earth, kind of like a microwave.
Actually, that's about 9w/sf or 31 btu/sf, or 390 sf/ton, which is a pretty typical AC load. Course that in turn makes me think the 100w/m^2 is bunk.
Course we'll need to send him on a fact finding mission. And the guy who's supposed to gas up the rocket, might put in x liters instead of x gallons.....mistakes do happen....
I like it. Moroned on the other side of Mars. Marooned too.
Yeah, let the Martians deal with the idiot for a while. They’ll probably sit in their SUV’s and roll their squinty little alien eyes, just like back home.
It’s a giant mirror.
With no fans or active circulation isn’t it going to take forever for the heat in your house to make its way to the device for subsequent re-radiation?
I think of hot summer mornings here when the rising sun is heating the east wall of the house (and we need to turn on the A/C at about 9AM). Humidity not really a problem here, though. Tends to be about 40% in an air conditioned house.
Have nothing whatsoever to do with the topic here.
Oh, sh*t! Here he comes now...
I don’t know about it being a scam - they may just be a bit naive or optimistic.
I agree with you, though, a mirror would probably reflect more than this device, including IR, however the reflected IR from the mirror would most likely get absorbed by the atmosphere, whereas they claim that their reflected IR would not.
Regardless the mirror would still cause the house to be cooler, whether it’s enough to compensate for the ambient warm air is doubtful.
Obviously anything that reduces the heat load on the house is useful (that’s why houses are insulated).
So the key question is, is this new thing better and cheaper than insulation?
Even if they get this thing to work and even if it is cheap as dirt to instal and maintain your electricity bill will not go down because the rate will rise since the utility companies still have to fire the generators and the government will tax you on the power you might have used just like the rain taxes.
I stopped reading at the professor of electrical engineering's name -- "Shanhui Fan"!
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