Quote:
Originally Posted by renault_megane_dci
I have to admit I am interested in using exhaust heat.
So how would you guys do it ?
I think copper tube rounded around exhaust tube and held in place with some exhaust insulating wrap.
Then use thermosiphon principle : heat goes up and does the flow in the system.
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Exhaust temps would most likely climb too high for this type of system, boiling the water to steam, I foresee extremely high pressure in the coolant side of the exchanger. You would need a way to stop the exhaust adding heat once the engine was warmed up, otherwise a cooked engine is on the cards. Something similar to an egr valve is what I was thinking, which would enable you to switch the exhaust heat off when not needed.