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 1 year 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 1 year ago
Soup@lemmy.world 1 year 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 1 year 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 1 year 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 1 year 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.
finitebanjo@lemmy.world 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.
swagmoney@lemmy.ca 1 year ago
ir light is heat dawg
Hello_there@fedia.io 1 year 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 1 year 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 1 year 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 1 year 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 1 year 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 1 year ago
mine is good for a few degrees in the winter but i’m in a small room with the door shut
Spacehooks@reddthat.com 1 year ago
7-10 degree difference for me on cold days but thats 2 gaming PCs all day.
robot_dog_with_gun@hexbear.net 1 year ago
or folding@home
jcs@lemmy.world 1 year 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 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.kkj@lemmy.dbzer0.com 1 year ago
They must have overshot, then. Computers are 100% efficient space heaters that produce math as a byproduct.
ryedaft@sh.itjust.works 1 year ago
Boo, get heat pump you loser
frezik@lemmy.blahaj.zone 1 year 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 1 year ago
I dunno, I’m seeing some light.
unrealMinotaur@sh.itjust.works 1 year ago
Light is absorbed by materials and ultimately becomes heat.
Klear@quokk.au 1 year ago
Four or five?
IAmNorRealTakeYourMeds@lemmy.world 1 year ago
and what happens to the energy of said photons once they interact with your retina?
Vespair@lemmy.zip 1 year ago
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
thinkercharmercoderfarmer@slrpnk.net 1 year ago
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.
AnarchistArtificer@slrpnk.net 1 year ago
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
chgxvjh@hexbear.net 1 year ago
RheumatoidArthritis@mander.xyz 1 year ago
Stealing heat vs creating heat. It’s like comparing the price of a cinema ticket to a torrent.
chgxvjh@hexbear.net 1 year ago
Who would win in a fight? Cinema ticket or torrent?
xthexder@l.sw0.com 1 year 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.
JackbyDev@programming.dev 1 year ago
FaceDeer@fedia.io 1 year ago
Make those heating coils out of superconductors and it'll be even more efficient.
shalafi@lemmy.world 1 year ago
0x0@lemmy.zip 1 year ago
My cat agrees.
MonkeMischief@lemmy.today 1 year ago
So does our Colombian red tail boa! :D
Bluewing@lemmy.world 1 year ago
Pfftt. Splitting wood is peak heat thermodynamics. And I can attest it keeps you warm down to -40F.
Zerush@lemmy.ml 1 year ago
That is how the power supply of my Laptop look like, playing Cyberpunk 2077 on my laptop.
baldingpudenda@lemmy.world 1 year ago
cassandrafatigue@lemmy.dbzer0.com 1 year ago
Winter is gaming season.
Nikls94@lemmy.world 1 year 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 1 year 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.
khannie@lemmy.world 1 year ago
Turn that entropy up to 11, boi!
TacoButtPlug@sh.itjust.works 1 year ago
(As a nerd) I came here for the nerdy comments.
jawa22@lemmy.blahaj.zone 1 year ago
LillyPip@lemmy.ca 1 year ago
So hot.
yardy_sardley@lemmy.ca 1 year ago
Refrigeration cycle scoffs at your mere 100% efficiency
Thorry@feddit.org 1 year ago
Nah this thing puts out light and probably vibrates as well, so not even 100%.
LibertyLizard@slrpnk.net 1 year 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 1 year ago
Light is just heat energy
Lemmyoutofhere@lemmy.ca 1 year ago
Refrigeration just moves heat, it does not create it.
GissaMittJobb@lemmy.ml 1 year ago
Why create heat when you can just steal it from somewhere else, though
T156@lemmy.world 1 year ago
It would end up creating some, due to inefficiencies, which may contribute.
devedeset@lemmy.zip 1 year ago
In terms of “use electricity to make heat” it still trounces resistive heating. This whole thread is arguing about the definition of efficiency.