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If a machine is never 100% efficient transforming energy into work because part of the energy is converted into heat, does it mean an electric heater is 100% efficient? @showerthoughts@lemmy.world

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[-] lolcatnip@reddthat.com 3 points 4 months ago

Consuming energy to do something the device isn't intended to do is the definition of inefficiency. You've basically redefined efficiency so as to make it meaningless.

[-] FiskFisk33@startrek.website 11 points 4 months ago

What are you confused about?
That's why they phrased it "also basically 100% efficient space heaters."

Every electric device is a something% effective whatever work they are meant for device, but ALSO a 100% effective space heater.
That second part is meaningless to the devices normal function, but very relevant to the post question.

[-] Kissaki@feddit.de 7 points 4 months ago

They didn't redefine efficiency. They changed the purpose scoping.

[-] Jimmycrackcrack@lemmy.ml 2 points 4 months ago

It would be meaningless, were it not for the context of the question it is answering. All of the electrical energy consumed is being turned in to heat in all those cases making it indeed possible to make a 100% efficient heater using electricity as was asked. The fact that that is orthogonal to the purpose of the machines is only relevant in as much as that's why they were chosen as illustrative examples, showing that even when you're not trying to, you end up making 100% efficient space heaters from electrical devices.

this post was submitted on 17 Feb 2024
247 points (97.3% liked)

Showerthoughts

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A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.

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