this post was submitted on 23 Oct 2025
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Science Memes

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[โ€“] stupidcasey@lemmy.world 67 points 1 week ago (21 children)

Not true, it is true that it is heating at %100 efficiency that is to say %100 of the electrical energy is being transferred into heat (although technically some is being transferred into IR light not necessarily what you want) but your goal is probably not to simply create heat your goal is probably to heat the room or at least yourself and their is plenty of waste heat going off into space somewhere also you can achieve more than %100 heat transfer by compressing the external air's heat we call these heat pumps and they can achieve +400%. The key word is efficiency.

[โ€“] rmuk@feddit.uk 7 points 1 week ago (4 children)

๐Ÿค“ ACKSHUALLY

It's not possible for a heat pump - or anything - to even be 100% efficient, let alone 400%. Efficiency is measure of how much of the input energy gets converted to useful output energy, and since heat pumps don't actually create heat the useful output is the compressor's ability to pump refrigerant about. The Coefficient of Performance - the ratio between energy put in and useful work done - is 400% for a heat pump (give or take).

[โ€“] Canonical_Warlock@lemmy.dbzer0.com 14 points 1 week ago (3 children)

heat pumps don't actually create heat

๐Ÿค“ ACKSHUALLY

Heat pumps create a fair bit of heat due to friction and electrical resistance in the compressor.

[โ€“] untorquer@lemmy.world 6 points 1 week ago (1 children)

๐Ÿค“ AKSHUALLY

Energy is conserved. It is converted from another form of energy, or in this case mostly transported, not created.

[โ€“] Liz@midwest.social 3 points 1 week ago (1 children)

Heat and energy are not the same thing, scrub. You can create heat no problem.

[โ€“] untorquer@lemmy.world 3 points 1 week ago

Fuck me, every time with this "useful heat" bs...

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