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A comment on The EV Transition Is Harder Than Anyone Thinks. Parent comment

Re:The EV Transition Is Harder Than Anyone Thinks by nradov on Tuesday March 28, 2023 @11:17PM (#35351873)
Most of the waste heat created by an ICE is dumped out the exhaust, not the radiator.
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Re:The EV Transition Is Harder Than Anyone Thinks by cyberax on Tuesday March 28, 2023 @11:55PM (#35352238)
Yup. The "1/3-rd of mechanical power" is an empirical rule.

However, it seems reasonable once you think about it.

The mechanical power of a car is about 25-30% of the total heat generated. So a 150hp car actually generates about 450hp of heat energy. Most of that power is indeed lost in exhaust. The 1/3 of 150hp is 50hp, around 10% of the total.

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