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Cooling panel sends excess heat back into outer space (Eliminate A/C? Power companies won't like)
Venturebeat Green ^ | April 15, 2013 | Chitra Rakesh

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, we’re 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 ...


TOPICS: Business/Economy; Science
KEYWORDS: airconditioning; energy; engineering; solar
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1 posted on 04/16/2013 7:41:37 PM PDT by 2ndDivisionVet
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To: 2ndDivisionVet
It radiates the heat out in the atmosphere into outer space

Well alrighty then.
2 posted on 04/16/2013 7:43:50 PM PDT by cripplecreek (REMEMBER THE RIVER RAISIN!)
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To: 2ndDivisionVet
It radiates the heat out in the atmosphere into outer space.

Space: The Final Frontier.

3 posted on 04/16/2013 7:45:52 PM PDT by Steely Tom (If the Constitution can be a living document, I guess a corporation can be a person.)
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To: 2ndDivisionVet

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!


4 posted on 04/16/2013 7:45:53 PM PDT by Mamzelle
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To: Steely Tom

Space: The Final Heat Exchanger.


5 posted on 04/16/2013 7:46:36 PM PDT by Steely Tom (If the Constitution can be a living document, I guess a corporation can be a person.)
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To: 2ndDivisionVet

Sounds like a technological solution for any supposed “Global Warming”. Chalk another one up to Technology.


6 posted on 04/16/2013 7:48:35 PM PDT by Paradox (Unexpected things coming for the next few years.)
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To: 2ndDivisionVet

7 posted on 04/16/2013 7:48:59 PM PDT by smokingfrog ( ==> sleep with one eye open (<o> ---)
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To: 2ndDivisionVet

Isn’t outer space actually beyond the atmosphere?


8 posted on 04/16/2013 7:49:33 PM PDT by Mastador1 (I'll take a bad dog over a good politician any day!)
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To: 2ndDivisionVet

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?


9 posted on 04/16/2013 7:49:52 PM PDT by Cicero (Marcus Tullius)
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To: Paradox

What about the space warming that will take place and alter the universe? Could be bad.


10 posted on 04/16/2013 7:51:01 PM PDT by taterjay
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To: 2ndDivisionVet

It sounds great but at 100 watts per square meter it would require a great deal of area.


11 posted on 04/16/2013 7:51:40 PM PDT by old-ager
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To: 2ndDivisionVet

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.


12 posted on 04/16/2013 7:52:01 PM PDT by Nateman (If liberals are not screaming you are doing it wrong!)
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To: 2ndDivisionVet

Horsecrap. someone in academia is looking to score a big grant from the green energy dummies at the DoE


13 posted on 04/16/2013 7:52:15 PM PDT by JohnBrowdie (http://forum.stink-eye.net)
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To: 2ndDivisionVet
The three-member team recently published its findings, and hopes to roll out an experimental prototype within a few months. They’ve spent a year doing extensive simulations and theoretical calculations.

So, they're selling math?

Good work if you can get it . . .
14 posted on 04/16/2013 7:53:58 PM PDT by BraveMan (Please use the comments to demonstrate your own ignorance and lack of respect!)
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To: 2ndDivisionVet

“Shanhui Fan, professor of electrical engineering at Stanford University, and graduate students, Aaswath Raman, and Eden Rephaeli,...”

Damn the Irish kick ass at engineering.


15 posted on 04/16/2013 7:54:36 PM PDT by EEGator
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To: smokingfrog

Arab architects - before they went insane with islam and mosques and general gaga bs, were very adept at using natural cooling techniques.


16 posted on 04/16/2013 7:55:25 PM PDT by Hardraade (http://junipersec.wordpress.com (Vendetta))
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To: cripplecreek

Now Al Gore will have to stop galactic warming.


17 posted on 04/16/2013 7:56:24 PM PDT by Lurkina.n.Learnin (Obama is the Chicken Little of politics)
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To: 2ndDivisionVet

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..


18 posted on 04/16/2013 7:58:59 PM PDT by this_ol_patriot
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To: 2ndDivisionVet

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.


19 posted on 04/16/2013 7:59:30 PM PDT by Clay Moore ("In politics, stupidity is not a handicap." Napoleon Bonaparte)
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To: cripplecreek

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.


20 posted on 04/16/2013 8:02:23 PM PDT by Cboldt
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To: 2ndDivisionVet
Don't open the windows to catch a breeze!

Regards,
GtG

21 posted on 04/16/2013 8:03:31 PM PDT by Gandalf_The_Gray (I live in my own little world, I like it 'cuz they know me here.)
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To: taterjay

Cthulhu will become angry and seek vengeance.


22 posted on 04/16/2013 8:03:57 PM PDT by EEGator
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To: 2ndDivisionVet

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?


23 posted on 04/16/2013 8:04:17 PM PDT by jeffc (The U.S. media are our enemy)
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To: taterjay
What about the space warming that will take place and alter the universe? Could be bad.

Global Galactic Warming!

We need to tax it!!

24 posted on 04/16/2013 8:04:19 PM PDT by airborne (MY HEROES DON'T WEAR CAPES. MY HEROES WEAR DOG TAGS ! ! !)
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To: 2ndDivisionVet

Let’s not celebrate just yet. It’s completely OBVIOUS that this will cause Universal Warming.


25 posted on 04/16/2013 8:04:35 PM PDT by willgolfforfood
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To: Nateman
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.
++++++++++
I'm not sure. What isn't discussed much in the article is the mechanism for converting the heat from, for example, your house into energy in the particular infrared frequency band that will pass unattenuated through the atmosphere to the ultra cold of outer space. Thermodynamically this makes outer space a heat sink for your home. Not bad if they can actually do it.
26 posted on 04/16/2013 8:06:31 PM PDT by InterceptPoint
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To: airborne

Romulans first. They are wealthy I hear.


27 posted on 04/16/2013 8:10:25 PM PDT by taterjay
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To: 2ndDivisionVet

It is time for some good old ass kicking of the rulers of the world.


28 posted on 04/16/2013 8:13:09 PM PDT by logitech (It is time.)
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To: 2ndDivisionVet

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.


29 posted on 04/16/2013 8:15:52 PM PDT by FreedomPoster (Islam delenda est)
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To: Cicero

See my previous. We’re on the same page.


30 posted on 04/16/2013 8:16:40 PM PDT by FreedomPoster (Islam delenda est)
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To: 2ndDivisionVet

What happens when it is hot and overcast?


31 posted on 04/16/2013 8:19:09 PM PDT by dangerdoc (see post #6)
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To: jeffc
The system does more than reflect all the sunlight. It is also transparent to the IR that your house is (always) emitting, and that IR energy is radiated into space.
32 posted on 04/16/2013 8:20:12 PM PDT by Cboldt
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To: InterceptPoint

Basically, you are using space as a heat sink.


33 posted on 04/16/2013 8:20:15 PM PDT by dangerdoc (see post #6)
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To: old-ager
It sounds great but at 100 watts per square meter it would require a great deal of area.

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.

34 posted on 04/16/2013 8:21:27 PM PDT by Paradox (Unexpected things coming for the next few years.)
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To: 2ndDivisionVet
xray specs photo: xray med_xray_specs.jpg

For an encore, he's making X-Ray specs that work.

35 posted on 04/16/2013 8:22:07 PM PDT by Snickering Hound
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To: 2ndDivisionVet
Re: " 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."

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.

36 posted on 04/16/2013 8:30:19 PM PDT by Cribb (Home of Conservatism - America's middle class.)
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To: old-ager
It sounds great but at 100 watts per square meter it would require a great deal of area.

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.

37 posted on 04/16/2013 8:44:51 PM PDT by Still Thinking (Freedom is NOT a loophole!)
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To: Lurkina.n.Learnin
Now Al Gore will have to stop galactic warming.

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....

38 posted on 04/16/2013 8:50:47 PM PDT by Still Thinking (Freedom is NOT a loophole!)
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To: Still Thinking

I like it. Moroned on the other side of Mars. Marooned too.


39 posted on 04/16/2013 8:55:01 PM PDT by Lurkina.n.Learnin (Obama is the Chicken Little of politics)
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To: Lurkina.n.Learnin

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.


40 posted on 04/16/2013 8:58:12 PM PDT by Still Thinking (Freedom is NOT a loophole!)
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To: 2ndDivisionVet

It’s a giant mirror.


41 posted on 04/16/2013 9:06:16 PM PDT by Kirkwood (Zombie Hunter)
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To: 2ndDivisionVet

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.


42 posted on 04/16/2013 9:13:38 PM PDT by steve86 (Acerbic by Nature, not NurtureĀ™)
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To: Cribb
alpha, beta, gamma rays

Have nothing whatsoever to do with the topic here.

43 posted on 04/16/2013 9:16:56 PM PDT by steve86 (Acerbic by Nature, not NurtureĀ™)
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To: Lurkina.n.Learnin
Now Al Gore will have to stop galactic warming. That would be very inconvenient, indeed.
44 posted on 04/16/2013 9:21:13 PM PDT by Rodamala
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To: EEGator; Windflier
Cthulhu will become angry and seek vengeance.

Oh, sh*t! Here he comes now...


45 posted on 04/16/2013 9:38:14 PM PDT by Rodamala
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To: Nateman

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?


46 posted on 04/16/2013 9:57:26 PM PDT by aquila48
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To: 2ndDivisionVet

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.


47 posted on 04/16/2013 10:01:00 PM PDT by Fai Mao (Genius at Large)
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To: Mastador1

KHAAAAAAN!

I stopped reading at the professor of electrical engineering's name -- "Shanhui Fan"!

Shanhui This Professor!

48 posted on 04/16/2013 10:03:51 PM PDT by BobP (The piss-stream media - Never to be watched again in my house)
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To: Rodamala

Ahhhhhhhhhhhhh!


49 posted on 04/17/2013 4:14:01 AM PDT by EEGator
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To: 2ndDivisionVet
Anthropogenic Space Warming?
This is not going to end well.
50 posted on 04/17/2013 6:51:37 AM PDT by Amagi (Obama is never so animated as when he is assaulting the Constitution.)
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