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Old 10-03-2018, 09:01 PM   #12 (permalink)
oil pan 4
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To make 1kw you would need 3,412 BTUs if 100% efficient. So maybe 25% efficient so 13k BTUs.
If I remember correctly they aren't really efficient.
I think 100w is more realistic so you would only lose 1.3k BTUs. Which is a fraction of the heat you lose using the heater with the windows and the system on recirculation.

Plus if you build your teg unit up front and pipe the coolant to the unit you could control coolant flow with a valve and not open the valve till the engine warmed up.
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