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[–] 179 points 1 year ago (6 children)

Refrigeration cycle scoffs at your mere 100% efficiency

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  • [–] 2 points 1 year ago (5 children)

    Refrigeration just moves heat, it does not create it.

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  • [–] 61 points 1 year ago (18 children)

    If you want to make heat, start up a gaming PC. At least the energy will go to doing something before it gets turned to heat.

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  • [–] 34 points 1 year ago (9 children)

    I legitimately had to buy a heater after I stopped regularly using my desktop because it was what was keeping my room warm.

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  • [–] 35 points 1 year ago (7 children)

    At that point you might as well run Folding@home on your PC just to act as a heater. It's literally a win-win for you and for society.

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  • [–] 9 points 1 year ago (4 children)

    It's always been on my mind to find something for my computer to idle on. Never heard of "Folding@home". Thank you I'll try it out.

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  • [–] 14 points 1 year ago (2 children)

    You're welcome! Folding@home is the big one, and the Great Internet Mersenne Prime Search is also pretty popular (though IMHO a waste of resources for a relatively useless result). But I just looked into this topic myself after posting that comment, and turns out there's a huge list of such "volunteer computing" projects: https://en.wikipedia.org/wiki/List_of_volunteer_computing_projects

    So while Folding@home is a great one and medical scientific research, you might pick something else from that list. Perhaps more than one!

    Now the confession: I'm a hypocrite. I never ran any of these volunteer computing projects on my own PCs. But that's partly because I tend to shut them off every night, so a lot of the usable time for it isn't really usable. The other part is basically that I never bothered to do it.

    But I think after this conversation reminded me of it, I might look into installing it on my PC!

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  • [–] 9 points 1 year ago

    I used to do it for SETI@home (search for extraterrestrial intelligence) and a few other projects. Haven’t in a while now but maybe I will again since my server pc never shuts off anyway.

    Back in the day I used boinc or some such to interface, it sort of looked like a torrent page, with progress bars on the tasks and stuff. It was kinda neat having an impact.

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  • I literally did that one winter when I lived in a small studio and I had a particularly fancy salvaged HP workstation. It was great!

    (Except I was missing an apparently important fan and most of my RAM went bad, 96G out of 128. Make sure your system cooling works correctly before trying this!)

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  • [–] 3 points 1 year ago (7 children)

    I don't have a source handy, but someone attempted to heat their apartment with computers and ended up spending something like >$1000 in utilities that month.

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  • [–] 5 points 1 year ago

    Resistive heat is expensive - that's why heat pumps are so good.
    In practice, they would have gotten identical results with any electric resistive heater. Fans, oil filled, ceramic, etc. all largely doesn't matter as it is Wh of electricity to Wh of heat.

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  • [–] 5 points 1 year ago (5 children)

    They must have overshot, then. Computers are 100% efficient space heaters that produce math as a byproduct.

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  • [–] 2 points 1 year ago (4 children)

    in the uk price per kWh for electricity is over five times cost of natural gas. We all use natural gas boilers to heat water which flows through radiators to warm our rooms. Anybody who heats their house with space heaters is just throwing money away whether it's 100% efficient or not.

    You see more heatpumps these days but that's another thing entirely

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  • [–] 2 points 1 year ago* (last edited 1 year ago) (3 children)

    Heat pumps cap out at about 250% 400% efficiency, so you'd still be spending more to run them than to burn natural gas at that ratio.

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  • [–] 4 points 1 year ago (2 children)

    Heat pumps easily exceed 2.5 COP. More like 4 in the UK climate. And gas isn't 100% efficient either. But yeah it's a wash or can be more expensive to heat with heat pumps where electricity is really expensive. It helps if we all conveniently ignore externalities like pollution and carbon too.

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  • [–] 3 points 1 year ago (1 child)

    Thanks for the correction, edited. How is gas not 100% efficient, though?

    But yeah, heat pumps are definitely more environmentally friendly (unless you're habitually letting the refrigerant out, o guess). The real argument is whether the extra energy is worth it for protein folding (I'd say generally no, but if you don't have a heat pump, might as well).

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  • [–] 67 points 1 year ago (19 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.

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  • [–] 38 points 1 year ago (11 children)

    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.

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  • [–] 26 points 1 year ago* (last edited 1 year ago) (10 children)

    Well, we're not generating heat with heat pumps. We're compressing atoms to make them angrier and pass other atoms by that bunch to even out the angriness. Could also substitute the word jiggy for angry.

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  • [–] 2 points 1 year ago*

    And since very little heat is generated, we don't further heat up our planet. Not much, anyway. electricity generation is another issue if it's fossil based, but at least less is used.

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  • [–] 2 points 1 year ago (6 children)

    Huh, so what if the jiggy atoms come in contact with batman atoms?

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  • [–] 2 points 1 year ago (5 children)

    Then Batman is going to have to get jiggy with it.

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  • [–] 1 point 1 year ago (4 children)
  • [–] 2 points 1 year ago (3 children)
  • [–] 1 point 1 year ago (2 children)

    Superman tries to shake off Batman, but Batman just smiles and tenses his anus even more...

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  • [–] 6 points 1 year 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.

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  • [–] 8 points 1 year ago (4 children)

    🤓 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).

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  • [–] 15 points 1 year ago (3 children)

    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.

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  • [–] 6 points 1 year ago (2 children)

    🤓 AKSHUALLY

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

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  • [–] 30 points 1 year ago (5 children)

    Everyone here is talking about heat pumps for being more efficient. pfft

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  • [–] 7 points 1 year ago (4 children)

    Got one of these bad boys for my patio. Highly recommended if you wait for a sale.

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  • [–] 26 points 1 year ago

    Boo, get heat pump you loser

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  • [–] 21 points 1 year ago (6 children)

    Most of the time, we consider heat output to be inefficient. It only works here because heat happens to be its purpose.

    You could say it's 0% efficient.

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  • [–] 27 points 1 year ago (5 children)

    I dunno, I’m seeing some light.

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  • [–] 12 points 1 year ago (2 children)

    Light is absorbed by materials and ultimately becomes heat.

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  • [–] 21 points 1 year ago (1 child)

    Well, heat pumps are significantly more efficient than traditional heaters because they move heat rather than generating it. A heat pump can deliver three to four times more heat energy than the electrical energy it consumes, making them 300-400% efficient.

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  • [–] 15 points 1 year ago
    [–] 18 points 1 year ago (3 children)

    Pfft. Making things hotter is easy. The fact that we can regularly make things colder and hold them at that colder temperature is what's actually impressive in thermodynamics

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  • [–] 6 points 1 year ago (2 children)

    Pfft the absolute human hubris to hold up these entropic sleight-of-hand tricks as impressive. Nature abhors a refrigerator. Heaters are the ultimate power in the universe.

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  • [–] 10 points 1 year ago (1 child)

    Our entire existence is a temporary rebellion against entropy. In light of that, hubris seems inevitable. I reckon a little bit of it is useful for us

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  • You inspired me

    I do not fear the motion of my feet.
    Though every step be toward the final bourn,
    I see no path to orderly retreat.
    
    The energy assigned in brief to me
    No art preserves, no science can reform.
    And so I boldly choose what is to be
    
    The range and purpose of my tiny mete.
    I will not, while I can, myself pre-mourn,
    But rage, rage against the rising of the heat.
    
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  • [–] 7 points 1 year ago (1 child)

    Make those heating coils out of superconductors and it'll be even more efficient.

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  • [–] 5 points 1 year ago

    Pfftt. Splitting wood is peak heat thermodynamics. And I can attest it keeps you warm down to -40F.

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  • [–] 4 points 1 year ago (6 children)

    That is how the power supply of my Laptop look like, playing Cyberpunk 2077 on my laptop.

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  • [–] 3 points 1 year ago (3 children)

    I was testing the AI image generating capabilities of a M1 MacBook Air 16GB.

    It shuts down at 113°C (235°Freedom)

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  • [–] 1 point 1 year ago (2 children)

    113ºC is hard on the limit, chips at 140ºC convert the PC in an Paperweight. Normally they desconnect the Device with >90-95º. Permit 113º is maybe related to an programmed obsolence policy from Apple.

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  • [–] 1 point 1 year ago (1 child)

    I don't think that's planned obsolescence. The limits on laptops are usually higher than the limit on desktop PCs.

    And I had a ~110°C threshold as well on a Dell laptop running Linux, so it's not just 'a Apple thing.

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  • [–] 1 point 1 year ago

    It's because an silicon chip, which with 140ºC begins to degrade, the reason why they use an thermic security which desconnect the device on critical temperatures, but even so 110º isdefinitively to much and also will degrade the chip if it ocurred repeated times.

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  • [–] 4 points 1 year ago (1 child)
  • [–] 3 points 1 year ago

    (As a nerd) I came here for the nerdy comments.

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  • [–] 3 points 1 year ago

    Turn that entropy up to 11, boi!

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  • [–] 2 points 1 year ago
    [–] 2 points 1 year ago

    You're objectively wrong here.

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