3 ms·
> 400 milliwatts per square meter About two orders of magnitude weaker than solar panels, even over 24 hours. E = (T2-T1) / T2
by Animats 11mo ago
> 400 milliwatts per square meter
About two orders of magnitude weaker than solar panels, even over 24 hours.
E = (T2-T1) / T2
- kragen 11mo agoYes, but it works at night! Not sure if you can get the MTBF on Stirling engines higher than on LFP batteries, though.
- gsf_emergency_6 11mo agoAnd in the day time, if transparent and applied to solar panels, the "efficiency" gain (~10W psqm) itself will dwarf other considerations.( Remembering that bulk of radiative cooling shouldn't happen below ~1300nm) And then there's beating the efficacy of carbon capture at mitigating warming by orders of magnitudes Nothing to sneeze at. Just be careful of midbrow high-effort dismissals from the old and wise:) These guys are applying them to solar panels: https://www.i2cool.com/tideflow/uwJVdixI.html https://www.i2cool.com/tideflow/uwJVdixI.html "Case Study 2: Solar Farm in Dubai Problem: Solar panels lost 15–20% efficiency at 55°C+ temperatures. Solution: Coated panels with i2Cool’s film. Results: Panel surface temperature: ▼25.7°C (from 58°C to 32.3°C) Power output: ▲8% (equivalent to adding 2,400 new panels to a 30MW farm)"
- kragen 11mo agoThanks, that's staggering!
- scoopertrooper 11mo ago>400 milliwatts per square meter of mechanical power with a potential for >6 watts per square meter.
- Animats 11mo agoWhat miracle gets a Stirling engine to be 15x more efficient? Stirling engines have been around for over a century.
- burnt-resistor 11mo agoRF energy harvesting in urban areas results in about 0.5-5 mW/m^2. I would guess it would be about 1-2 orders of magnitude less in rural areas. This is like shaving nickels to make money. Certainly, there are better energy sources like the fusion reactor in the sky and building a fusion reactor (that's perpetually 30 years away). TIL: Active nuclear reactors of all types around the world are mappable using antineutrino detectors. It would probably also expose the location of every stationary nuclear-powered ship and submarine too.