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Re:How Water Heaters Have Evolved into Grid-Scale Energy-Sto... by dannypgh on Sunday January 27, 2019 @01:32PM (#19013009)
I think you just mean different things by "heating" - if you're talking about heating in a closed system, they're the same - 5 joules of energy are needed to increase the total heat energy by 5 joules, with either approach.

The advantage of the heat pump is that we are, for, say, 3 joules of energy, heating part of the system by 5 joules and heating the other part of the system by -2 joules.

This is great for home heating and the like because we don't care about making the outside slightly colder.

Re:How Water Heaters Have Evolved into Grid-Scale Energy-Sto... by SigmundA on Sunday January 27, 2019 @04:29PM (#19013900)
Good thing we don't live in a closed system and instead have a giant fusion reactor in the sky to heat the outside air.