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This is a baked idea <link>. For car exhausts there are a
few problems. There is certainly a decent heat gradient
from the exhaust gasses to the general environment. The
problem is the absolute temperatures are a bit nuts and
variable for your garden variety peltier, 1000-2000C
tends to count out most electronics. People have worked
around it but the increased weight, cost and complexity
usually obliterates any efficiency gains. BMW tried a
steam system to feed power back to the crank <link>.
From personal experience, anything exposed to the
elements and the heat cycling of an exhaust system will
break. Its a horrible environment. |
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... yet still somehow much more pleasant than Basingstoke. |
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Yes, what [bs] said - that sort of energy recovery is Baked and WKTE, generally on static or semi-static (marine) installations that run at more or less constant load. |
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Suppose the thingie* were attached to a large thermal mass,
to dampen out the temperature variations, via a better
insulator. The thingie then experiences steadier lower
temperature over a longer time period with a longer
operational life. |
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I just wasted far too much time working out if I could make
a thermoelectric addition to my motorcycle, I thought the
air/oil cooling would allow a bit more temp difference,
since the engines run 50-100C hotter. But no, turns out 12-
18W is optimistic. That might make a good phone charger. |
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