Matt Coston wrote:The efficiency of TEGs is between 5-8% (according to Wikipedia). To me this means a TEG should really only be used to harvest waste heat. You're better off capturing the heat from your fire in thermal mass than converting)
EDIT: Having thought about this some more, I'd like to recognize that I have no idea where in the world you live and you know better than I do about your solar potential. If you live in the Arctic Circle then yep, get a TEG
Matt Coston wrote:Frank, Mike:
Here's a good video about what can be done with solar in the UK right now (using USA technology):
Mike Jay wrote:Frank, another advantage to the TEG is that the cooling water is heated and then can be used for heating distant rooms or a hot water tank. Maybe that would be another selling point for you...
Joe Wamsley wrote:How expensive is a TEG? Looks like 99¢ per 1.5" square.
How long does a TEG last? Do peltier devices have a known half life? I think they are magic.
Solar panels have a 30 year life. If I am remembering correctly the last spec I read boasted a linear decline of 3% per year in optimal conditions. I couldn't find optimal conditions but I'm pretty sure that includes a water cooled backside.
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