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.
Fight me
Submitted 19 hours ago by Stamets@lemmy.dbzer0.com to science_memes@mander.xyz
https://lemmy.dbzer0.com/pictrs/image/47650112-6d66-4a28-8cfc-0d8ad2b6dce4.webp
Comments
stupidcasey@lemmy.world 14 hours ago
finitebanjo@lemmy.world 3 hours 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.
Soup@lemmy.world 13 hours 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.
Devjavu@lemmy.dbzer0.com 12 hours ago
Well, we’re not genersting 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 world jiggy for angry.
rmuk@feddit.uk 11 hours 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 8 hours 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.
Hello_there@fedia.io 18 hours ago
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.
HexadecimalSky@lemmy.world 17 hours ago
I legitimately had to buy a heater after I stopped regularly using my desktop because it was what was keeping my room warm.
NeatNit@discuss.tchncs.de 17 hours ago
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.
motor_spirit@lemmy.world 14 hours ago
running FFXI and later WoW on my first rig (many moons ago) allowed me to keep my room nice and balmy all winter, to the point where I’d leave a window open for much of the day during snow-supporting temps and it’d still be toasty
godlessworm@hexbear.net 17 hours ago
gaming pcs are a fuck cause they never get hot enough to warm up a cold room but they definitely make a hot room even hotter
robot_dog_with_gun@hexbear.net 4 hours ago
mine is good for a few degrees in the winter but i’m in a small room with the door shut
robot_dog_with_gun@hexbear.net 17 hours ago
or folding@home
jcs@lemmy.world 13 hours ago
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.
Hello_there@fedia.io 12 hours 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.kkj@lemmy.dbzer0.com 13 hours ago
They must have overshot, then. Computers are 100% efficient space heaters that produce math as a byproduct.
ryedaft@sh.itjust.works 18 hours ago
Boo, get heat pump you loser
frezik@lemmy.blahaj.zone 18 hours ago
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.
credo@lemmy.world 18 hours ago
I dunno, I’m seeing some light.
unrealMinotaur@sh.itjust.works 18 hours ago
Light is absorbed by materials and ultimately becomes heat.
Klear@quokk.au 17 hours ago
Four or five?
IAmNorRealTakeYourMeds@lemmy.world 17 hours ago
and what happens to the energy of said photons once they interact with your retina?
chgxvjh@hexbear.net 18 hours ago
RheumatoidArthritis@mander.xyz 16 hours ago
Stealing heat vs creating heat. It’s like comparing the price of a cinema ticket to a torrent.
chgxvjh@hexbear.net 16 hours ago
Who would win in a fight? Cinema ticket or torrent?
xthexder@l.sw0.com 17 hours ago
Ground-source heat pumps seem like they could be the new hotness. You don’t have to dig very deep before the ground is a constant temperature, so that can be used to increase the efficiency even further in extremely hot/cold weather.
Tech Ingredients did a nice little DIY experiment with it.
betanumerus@lemmy.ca 18 hours ago
People say efficient without saying efficient at doing what with what.
FaceDeer@fedia.io 18 hours ago
Make those heating coils out of superconductors and it'll be even more efficient.
shalafi@lemmy.world 16 hours ago
Zerush@lemmy.ml 11 hours ago
That is how the power supply of my Laptop look like, playing Cyberpunk 2077 on my laptop.
baldingpudenda@lemmy.world 8 hours ago
cassandrafatigue@lemmy.dbzer0.com 7 hours ago
Winter is gaming season.
Nikls94@lemmy.world 7 hours ago
I was testing the AI image generating capabilities of a M1 MacBook Air 16GB.
It shuts down at 113°C (235°Freedom)
Zerush@lemmy.ml 2 hours ago
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.
jawa22@lemmy.blahaj.zone 11 hours ago
khannie@lemmy.world 12 hours ago
Turn that entropy up to 11, boi!
TacoButtPlug@sh.itjust.works 16 hours ago
(As a nerd) I came here for the nerdy comments.
LillyPip@lemmy.ca 17 hours ago
So hot.
yardy_sardley@lemmy.ca 18 hours ago
Refrigeration cycle scoffs at your mere 100% efficiency
Thorry@feddit.org 18 hours ago
Nah this thing puts out light and probably vibrates as well, so not even 100%.
LibertyLizard@slrpnk.net 17 hours ago
Well ultimately it all becomes heat. Maybe a tiny amount escapes a window or something. So we could say 99%.
But heat pumps still reign supreme, at least until it gets super cold.
BakerBagel@midwest.social 17 hours ago
Light is just heat energy
Lemmyoutofhere@lemmy.ca 10 hours ago
Refrigeration just moves heat, it does not create it.
GissaMittJobb@lemmy.ml 3 hours ago
Why create heat when you can just steal it from somewhere else, though
devedeset@lemmy.zip 3 hours ago
In terms of “use electricity to make heat” it still trounces resistive heating. This whole thread is arguing about the definition of efficiency.
T156@lemmy.world 7 hours ago
It would end up creating some, due to inefficiencies, which may contribute.