Comment Re:Reinvented a Sterling engine (Score 1) 48
My first thought too, especially as there was a recent report somewhere, I think on the BBC but maybe not, on using Sterling engines for energy recovery.
A few years ago I saw a residential canal boat where the owner had made a small Sterling engine and just parked it on the boat's engine exhaust pipe. All it did was turn a fan, so I guess the aim was to circulate some warm air. Very little power, maybe enough to light an LED.