25 milliwatts of energy per square meter
Not great at the beginning, but they will make further advances.
is that continuously or over a period of an hour?
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?