To be fair, the physics that makes refrigeration work does feel like you’re manipulating primal forces like a wizard
Do not upset Maxwell’s demon when you’re down there sorting the cold atoms from the hot ones!
Did Maxwell contribute to thermodynamics?
It’s hard to believe that there was a point in my life where I could have read that article and understood it for the most part.
Now it might as well be hieroglyphics. Like I can see that symbol is an eye, and that one is a bird, but don’t ask me what that shit means.
I’m with you. My undergraduate degree was in Physics 35 years ago and all I have left is vague impressions of very general concepts. I’m quite certain that I would be unable to do even the simplest derivative or integration at this point.
Thanks. I wonder why I didn’t hear about him in thermodynamics but did in electromagnetics, maybe I forgot.
The early 1900s and late 1890s was where a lot of classical physics and newer quantum theory got their legs under them. After WW2 pretty much most of our current physics knowledge was theorized and it is only now in the last 50 years or so we got about proving a lot of those theories. I believe some of the things got disproven real hard but majority of the predictions and theoretical physics has been solidified. Quantum physics is waaaay waaaaay more complicated now in last 100 years than anything in the previous 500 or even 1000 years ago.
So, if you learn Newtonian physics and classical physics theory, even if you know just the basic linear/non-linear graphs and area under graphs, you can pretty much “guestimate” all the concepts and work the equations. It uses Maths called “Numerical Analysis and Methods”. A lot of physics uses Maths so Maths-knowledge is essential.
Material phase changes are like a cheat code for humanity. Reusable chemical handwarmers are also black magic. You just click a metal plate inside and all of a sudden it’s a hot solid.
NightHawkInLight made a video showing how you can mix two different salts together and it’ll create a packet that stays at 65 degrees for hours.
Who needs magical thinking when you have thermodynamics?
There’s a tank of cold inside. Its the primary export of northern European countries and sustains nearly their entire economies since the only other thing they can “make” is fucking rotten fish. Its important to recycle your AC every 3 years before it runs out of cold by throwing it into the ocean where it can return to be made into glaciers.
Well, because you didn’t add a /s to your comment, some day it will end up as an answer spewed out by some LLM, as absolutely factual.
I see no downsides
Do LLMs ignore the /s even?
They use sarcasm factually. It’s more entertaining that way.
This anti-swedish sentiment makes you look like a Dane.
That’s impossible. Everyone knows that Danes can’t communicate.
Weirdly this is basically how refrigerators worked before refrigeration was invented.
But instead of throwing out the refrigerator, you’d just add more cold to it.
Turn it around to cool the outside. Global warning solved.
Actually a more efficient electric heater. This is known as an heat pump, aka reverse AC
Seriously, that would have to work better than those giant fans they’re building offshore.
Ooh, I’ve always wondered what those were for. Makes sense.
They actually have a dual purpose, the second being killing seagulls.
this video from ‘technology connections’ explains it quite well ^^
I love how mad he gets at single duct in room units too. Rightfully so.
Through the magic of the latent heat of vaporization
i feel technologically connected right now
♫ thermodynamically smooth jazz ♫
Heat pumps really are amazing tech. What if I tell you that this is also how your fridge works. Crazy, right?
They are also one of the few things that are more than 100% energy efficient.
300% to be exact. Because it uses some natural phenomena that just needs a little jump start and then can be maintained with little energy for massive air movement.
Some are as high as 510% efficient
The vapor compression cycle isn’t exactly natural, and the compressor still needs a bunch of energy to keep going once it’s started.
Yeah I’m pretty sure my air conditioner uses more electrical energy than all my other appliances combined. Probably by an order of magnitude. No EV in my case of course.
Ah… energy doesn’t work that way. You can’t have a perpetually endless cycle with 100% efficiency in real world.
It’s called a CoP, Coefficient of Performance. It essentially is a factor of how much electricity you put in and how much cooling power comes out.
Cooling towers can have a CoP of 12 and beyond, whereas compression cooling usually lingers at around 3 to 3.5. so at a CoP of 3 for instance, you could put in 1 kW of electricity and get 3 kW of cooling power.
Well it’s not creating energy out of thin air. But it is moving it. So you get more energy moved than the amount of energy put in.
Sure but that’s not the definition of efficiency, I’m sure it might be 5x more effective than traditional heaters of some sort from the power consumption perspective
so technically, it’s not generating electricity, it’s moving heat from point A to point B, and believe it or not, 20f air still has a lot more heat energy in it than 0k air. So yeah, it’s more than 100% efficient. Comparing it to electric resistive heating, which is producing the heat directly from electricity, rather than moving it around.
An electric resistive heater is 100% efficient, the efficiency of gas furnaces is measured similarly, though they hit about 90% eff, due to basic mechanics. Geothermal systems would also have greater than 100% efficiency as well, due to the fact that they just move fluid around, which is then cooled by the earth, (or warmed by it) though external heating wouldn’t be.
Yup. I’m hoping my AC and furnace die around the same time so I can just replace both with a heat pump. Not sure if it’ll save much on heating prices since both nat gas and electricity are pretty cheap in my area, but it can hopefully make maintenance simpler.
A few years ago I replaced our electric furnace with a heat pump which also gave us AC. Overall the yearly bill went up because we now had AC, but winter months usage is almost half of what it was before. Only matching on the extra cold days where the backup heat kicks in.
it adds heat to the system to make more cold. duh. global warming solved. stupid enviromentards.
So, if we all turned up the heat also during summer, the climate would cool down! Genius! Just don’t go inside.
No yah dummy. Put the Room in the middle of the Earth and PUMP all the outside heat into the planet core!
BAM! Instant Arctic Weather in the middle of summer !
And BAM! Reverse it for the winter!
BAM! Mild Temps all Year round!
You can thank me later EnvironMentaLists!
Shove the hot out the window. *taps head
Oh boy have i got a video you you anon!
It has an entire section at the start explaining how these magic cold boxes work to help with understanding their next evolution heatpump
“all of the sudden”
Disregard
All of some sudden?
Some of the sudden.*
Part of the Sudan
In ye ole Enlysch, it was
“All of ye sudden”
For some raisin, “all of the sudden” just tastes better to me.
Technically “all of a sudden” is more correct.
ICP frequenting 4chan?
Wait until he finds out about refrigerators.
phase change refrigerant loops baby!
Technically it’s a uni directional heat pump. But we’re just abusing the basic laws of thermodynamics. Fluids when compressed, heat up, and when expanded, cool down. Compress it, it heats up, cool it down, and then expand it, and suddenly, boom sub ambient cooling has been achieved. (the phase change happens in between to maximize effectiveness/efficiency)
LOL 😅…so you got a cup of coffee ☕, you wait, it gets cold 🥶…how is that even possible!!!
Hot air goes out, cool air goes in. You can’t explain that.
