Alright, I found something that pertains a bit more to efficiency :
" What is the efficiency of Thermoelectric Generators?
The efficiency is about proportional to the temperature difference between the hot and cold fluids. With 70°C difference the efficiency is about 3%."
So 3%...this is not a lot. And it wouldn't compare favourably with the Stirling, if it performs as Kamen is hoping it will. Then again, this 3% is assuming you have a hot waste water supply, so the energy would be essentially free. But I believe one of these generators costs about $1500, so it would take a long time to recoup this cost, under most circumstances.
Seeker
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