thermoelectric generator (TEG)

VW and BWM have both come out with thermoelectric generator (TEG) systems. The basic premise here: use waste heat to make electricity. Get a couple of different types of metal, and some heat, and you get 600w in the VW case or 200w in the BMW case. It is a very cool idea wich completely runs around the difficulties of extracting greater efficiency from the maxed out (as an idea) internal combustion engine.

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