• stupidcasey@lemmy.world
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    2 days ago

    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.

    • Soup@lemmy.world
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      2 days ago

      It’s always wild to me that 100% heating efficiency is actually kinda not great. Also the fact that we can use the heat from air that is colder than what we want in order to generate more heat I mean that’s just witchcraft.

    • finitebanjo@lemmy.world
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      2 days ago

      I always like to muse that in terms of electronics the heat is caused by resistance to current and that heat is usually considered inefficiency, and since no other load exist or work is done that means heating elements are about -100% efficient.

    • rmuk@feddit.uk
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      2 days ago

      🤓 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).

      • Canonical_Warlock@lemmy.dbzer0.com
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        2 days ago

        heat pumps don’t actually create heat

        🤓 ACKSHUALLY

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