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Why not use the wasted heat energy of the internal combustion engine to make steam so it can run a steam turbine that is coupled to the transmission of your car? You would get the explosive force of the fuel along with the heat to do the work of moving the car at the same time.
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It would be big, heavy, and expensive.
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It would be big, heavy, and expensive.
It would add about 150 lbs to the weight of the car. However, it would get better fuel mileage.
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It won't improve the gas mileage very much because the engine is not really that hot, and most of the waste heat will escape in other directions. The gas mileage might actually get worse due to the extra weight.
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The exhaust could superheat the engine coolant and run the turbine. After it has done the work it could be condensed and returned back to the radiator.
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Weight problems and the dubious nature of the idea aside, that heat you want to harness from the engine isn't always "waste" to begin with.
Spend a winter in the northern Midwest and you'll know what I'm talking about. :;):
Build a man a fire and he's warm for a day. Set a man on fire and he's warm for the rest of his life.
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