ASTINA LAY

I said I will not talk with you anymore, even when you speak to me and I answer, still I don’t talk with you.

What does this do   ASTINA LAY: On Education : ��         By all means, this treatise of the highly demanding subject will not be complete, if not for anything    else, but for the r...

3-4 years ago I found on the web 25 Watt thermoelectric devices for $25, requiring 50 degrees C  difference between cold and hot sides and a 5% efficiency (?). For the moment, let's not examine the specifics of currents and volts and accept that a watt is a watt, is a watt and is always a watt and so 40 of them make a 1kW power battery, that's the power required by a middle of the range home air-conditioning unit. For the 50 degrees C  difference, earth's temperature can be used, which all year round is 15 degrees C at about 5 meters depth and the temperature inside a steel box under the sun, which easily can reach 65 degrees C in summer. That's not enough though, because we have to satisfy the energy requirements for the hot side to maintain its temperature in the steel box, and supply 1/0.05=20 kW, that's, rounded up, 20 m2 of sun's energy, that must be concentrated on the steel box through mirrors. Isn't this worth investigation for its application. Isn...