• sp3ctr4l@lemmy.dbzer0.comEnglish
      1·
      10 小时前

      A completely valid pannini press, imo.

      Like this is literally the ‘modern problems require modern solutions’ meme.

      I’ve used older PC battlestations of mine as ‘bonus’ spaceheaters more than once, lol, sorta like those ‘pocket warmer’ apps for phones that would just run some absurd computation that would redline the cpu, hahah!

    • kkj@lemmy.dbzer0.comEnglish
      37·
      16 小时前

      A brushless motor only converts ~5% of its input to heat. That’s low enough that you can reasonably call it a side effect.

      Now, a computer, that’s a heater that happens to produce math as a side effect. 100% of its input ends up as heat.

      • lonefighter@sh.itjust.worksEnglish
        6·
        15 小时前

        I love firing up my PC and gaming on cold winter nights. A well placed fan or two and I can spread it through my entire apartment and the heat won’t kick on all night. Ends up saving me money, my heater costs way more than my PC to run.

      • BradleyUffner@lemmy.worldEnglish
        4·
        13 小时前

        It all becomes heat eventually in the end though. Sometimes it’s just a multi step complex process outside the physical bounds of the heater.

        Wait a sec, is the universe just God’s space heater?

    • SorryQuick@lemmy.caEnglish
      1·
      10 小时前

      Indeed we’ve plugged in a bitcoin miner to our central heating and now heating is “free”. I’m not sure how profitable it is when you’re not using the heat though.

  • cass27@lemmy.zipEnglish
    5·
    10 小时前

    Noise would be a small but non-zero form of heat loss that shouldn’t contribute to temperature increase

    • dz2@sopuli.xyzEnglish
      1·
      10 小时前

      Noise would turn in to heat as it’s absorbed, so it’s just heat with extra steps. Same deal with lights

  • sp3ctr4l@lemmy.dbzer0.comEnglish
    4·
    11 小时前

    Perhaps this is a dumb question, but perhaps it is not:

    If you just had, in say a studio apartment, or a single bedroom, basically just a large container of water, where the container is made of something fairly to considerably thermally conductive…

    Would or could this act as something like a thermal regulator for the room, to a potentially useful degree, such that it could ease the overall power usage of an AC/Heating system?

    The water doesn’t do anything, in like a designed machine sense; its not part of plumbing or heating, its just a big ole tank of water, sitting there.

    The idea I am going with is something like how large static bodies of water act as regulators for nearby climate zones, through a day night cycle … they tend to keep temperatures in the surrounding area a bit more stable, though of course humidity and the water cycle have other effects in a more open weather system.

    I also realize there are a lot of potentially confusing or confounding variables at play here.

    But my thinking is that maybe, at some scale, in some conditions, this could basically normalize your day-night temperature cycle, at least somewhat.

    Obviously in real world, just a simple tank of water would potentially freeze in winter, or boil in summer, in more extreme environments, that you’d at bare minimum have to have some mechanical system to prevent problems… but uh, … yeah.

    • Dippy@beehaw.orgEnglish
      4·
      10 小时前

      Yes, this is called thermal mass, or more scientificly, heat retention. The more stuff you in have a space, the more resilient to change it’ll temperature it is. Insulation, is basically putting a bunch of high retention materials in perimeter of a building so that it stays more consistent

    • Pipster@lemmy.blahaj.zoneEnglish
      2·
      10 小时前

      You see this with normal heating systems. My house has hot air heating with a big burner and vents in the rooms. It is great for instant heat but once it turns off you lose the heat just as fast. And if you dont have a vent in the room it can be pretty cold.

      But the house I grew up in had water filled radiators in every room. Took ages to warm up the house but it would transfer an awful lot of heat into the brick walls so it would stay warm for a really long time after the heating shut off.

      So in the old house in winter you really didnt notice the heating turning on and off but in my new one it is painfully obvious. I really want to rip it out and get a better system.

    • billwashere@lemmy.worldEnglish
      2·
      10 小时前

      I don’t think it’s a dumb question at all. I’m not a physics person but I think what you’re describing is a thermal battery. It’s the reason people put tiles in their ovens for smoothing out hot and cold spots and moderating temperature swings from the oven cutting on and off or opening the door.

      • Omgpwnies@lemmy.worldEnglish
        2·
        10 小时前

        Large brick/stone fireplace+chimneys do similar in colder climates, holds heat in the winter and stays cooler in the summer.

        • BeMoreCareful@lemmy.worldEnglish
          2·
          10 小时前

          Oh, I hadn’t even thought of that. I always thought stoves were just way more efficient, but a giant old school hearth-thing actually makes a lot more sense now.

      • sp3ctr4l@lemmy.dbzer0.comEnglish
        1·
        10 小时前

        I didn’t downvote you, but:

        Ok, then… have a ceiling fan above it?

        A very slow one, that uses little energy?

      • scratchee@feddit.ukEnglish
        16·
        18 小时前

        Mostly, but not entirely.

        Most thing you struggle to approach anywhere near 100% efficient, heating is a bit easier in that you can get a lot closer, but you’ll still hit limits before reaching 100%.

        Saying inefficiencies are lost as heat is really a lazy simplification, inefficiencies are lost as anything It just turns out that 95% of anything is heat, from entropies perspective.

      • zergtoshi@lemmy.worldEnglish
        1·
        15 小时前

        If all became heat upon striking a surface that would make lighting anything pretty impossible and most would be dark.

    • ChickenLadyLovesLife@lemmy.worldEnglish
      3·
      15 小时前

      My oil heater makes gurgling noises so that acoustic energy is lost. It would also just heat up the room eventually, but I usually have a window open in winter so a tiny bit is lost that way.

    • 9point6@lemmy.worldEnglish
      1·
      16 小时前

      What about a combination heater/lamp where the lamp part is just incandescence

  • rumba@lemmy.zipEnglish
    2·
    11 小时前

    Electronics teachers generally clarify “other than resistive heaters”

  • AnarchoEngineer@lemmy.dbzer0.comEnglish
    226·
    1 天前

    Resistive heaters still suck though because Heat pumps give you 200-400% efficiency. So heating wise, “100%” still less than maximally efficient.

    (Not a violation of thermodynamics btw. Heat pumps use electricity to move heat energy that already exists, so the electric power in is often significantly smaller than the heat coming out of the device)

    • SpongyAneurysm@feddit.orgEnglish
      12·
      19 小时前

      Strictly speaking that’s not efficiency, but a coefficient of performance.

      And funny enough the work energy doesn’t even have to be electricity. It’s actually mechanical energy, that is required and you could even power a heat pump with a steam or diesel engine.

    • TheTechnician27@lemmy.worldEnglish
      601·
      1 天前

      Resistive heaters still suck though

      • Resistive heaters are much more portable and flexible. (edit: and quiet)
      • Resistive heaters are a viable backup when heat pumps fail in extremely cold weather.
      • Resistive heaters are less money upfront for if you only have to use them occasionally.

      One is not directly beneath the other. Both have their place.

      • AnarchoEngineer@lemmy.dbzer0.comEnglish
        20·
        1 天前

        Fair enough, do we need to extend this heater solidarity to combustibles as well?

        I mean technically they’re infinitely electrically efficient if you don’t use electricity to start them lol

        • ryannathans@aussie.zoneEnglish
          6·
          21 小时前

          No, but you can use some forms of “light” to heat things

          If you want confusing specifics, light has negative absolute temperature

          • captcha@lemmy.frozeninferno.xyzEnglish
            1·
            14 小时前

            Yeah, that is a bit confusing, i never thought about light being an example of one of those systems. Edit: looks like this applies only to laser light because light has a temperature of an emitting body, and lazing body has negative temperature

            my short interpretation would be like this

            A system with negative thermodynamic temperature is hotter than any system with a positive temperature. If a negative-temperature system and a positive-temperature system come in contact, heat will flow from the negative- to the positive-temperature system.

            This situation occurs because temperature is not really a measure of speed of particles, but rather a measure of entropy, and for ordinary objects entropy can increase infinitely, increasing temperature too. For systems with capped amount of states entropy reduces when energy is added, and that is negative thermodynamic temperature.

            So negative temperature is more energetic than positive, and because of that it heats up positive temperature object when in contact.

            Light kinda does that, but I am not sure I can come up with an explanation of how to measure its temperature and if it fits the definition

      • bebabalula@feddit.dkEnglish
        27·
        20 小时前

        Well, if you want to go all “technically” on this, then that sound technically dissipates as heat when it is absorbed by the interior of the room.

          • Danitos@reddthat.comEnglish
            5·
            16 小时前

            Why not? My underestanding is that 100% energy of a sound wave will ultimately be transformed to kinetic energy to particles in the room, be it a wall’s, an ear drum’s or air’s.

  • 33550336@lemmy.worldEnglish
    19·
    20 小时前

    Even if the heater’s energy partially is not wasted by a sound, it certainly is by generating magnetic field.

  • bufalo1973@piefed.socialEnglish
    5·
    16 小时前

    I’m not an expert but, would it be that one kind of energy can’t be 100% transformed to just one other kind of energy? That in any translation the result is always more than one kind of energy?

    • VAK@lemmy.worldEnglish
      1·
      12 小时前

      No, it just means there is at least some going into heat in thermodynamic processes. Inevitable with atoms jostling in macroscopic systems.

      • Coriza@lemmy.worldEnglish
        2·
        11 小时前

        And in case of a heater, some energy is going to be converted into light and sound and probably other stuff that I don’t know.