Yep, works great.
.
Posted on 09/12/2019 12:58:37 PM PDT by DUMBGRUNT
"Remarkably, the device is able to generate electricity at night, when solar cells don't work,"
"Beyond lighting, we believe this could be a broadly enabling approach to power generation suitable for remote locations, and anywhere where power generation at night is needed
The device developed by Raman and Stanford University scientists Wei Li and Shanhui Fan sidesteps the limitations of solar power by taking advantage of radiative cooling, in which a sky-facing surface passes its heat to the atmosphere as thermal radiation, losing some heat to space and reaching a cooler temperature than the surrounding air. This phenomenon explains how frost forms on grass during above-freezing nights, and the same principle can be used to generate electricity, harnessing temperature differences to produce renewable electricity at night, when lighting demand peaks.
Raman and colleagues tested their low-cost thermoelectric generator on a rooftop in Stanford, California, under a clear December sky.
(Excerpt) Read more at techxplore.com ...
25 milliwatts of energy per square meter
Not great at the beginning, but they will make further advances.
Hi.
Getting closer and closer to Galt’s Gulch.
5.56mm
Post Hurricane Harvey “Hell Yeah”
(2 months without power and water... this is what makes me happy)
sarc/ big time
Not great at the beginning, but they will make further advances.
Recall the early ICE version, ‘Hit and Miss’ engines?
ICE has come a long way.
When these engines were designed, technology was less advanced and manufacturers made all parts very large. A typical 6 horsepower (4.5 kW) engine weighs approximately 1000 pounds (454 kg)
https://en.wikipedia.org/wiki/Hit-and-miss_engine
Yep, works great.
.
is that continuously or over a period of an hour?
2 months without power and water...
Think of the bright side, you could have been in a Tesla in Alaska with a low battery; IN THE COLD!!!
NICE FIND!
Thanks.
Yep, works great.
Until you run out of dead dino juice.
We had a family here run one of those in their basement...
Is it 25 milliwatts per second then gradually sloping down as the energy is released toward ambient equilibrium because even 25 milliwatts continuously is a lot of energy over say 1 minute. With the right equipment it can charge batteries....so the article doesn’t say much.
25milliwats over 1 hour isn’t much but a continuous(albeit sloping amperage until 0 storage of heat is left.) 25 milliwatts per second over one hour is what 90watt/hrs which will power a laptop though amperage current is another issue which I assume will fall as the device’s thermal potential falls to ambient temp equilibrium.
Also as the thing heats up can energy start to be collected from the cold side because of the same thermo dynamic principles?
I wonder if the same principles could be used in certain nuclear power scenarios especially in deep space which would negate the need for turbine/steam or molten media to generate sufficient current for ship or deep space base operations. Plates are heated super warmly then as the heat radiates into space the thermal transfer is tapped for electrical energy and stored in batteries and/or slow discharge large value capacitors. No moving parts! The process is continuous or could be shunted by means of control rods via the reactor core.
I wonder if the same principles could be used in certain nuclear power scenarios...
https://en.wikipedia.org/wiki/Nuclear_thermal_rocket
And then there was that event in Mother Russia some weeks ago...
“an isotope power source in a liquid propulsion system”.
http://theconversation.com/nuclear-powered-missile-accident-in-russia-what-really-happened-121966
Good way to kill rats. And everything else.
*ping*
Just what is the light energy availability per square meter a night? I bet this cannot ever amount to much.
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