Speakerguy
Active Member
Doesn't efficiency depend upon how we define it? For example, I want to make a heater. Instead of using a resistive element, I attached a peltier to an infinite thermal source (let's say the crust of the earth). I put in 100W, but I get 200W (or some quantity >100W) of heat energy out of it on the 'hot' side of the pelt.
It's by no means 'free energy', but, practically and not in a physics sense, I am getting something for nothing, yes?
It's by no means 'free energy', but, practically and not in a physics sense, I am getting something for nothing, yes?