I understand all the cooling liquid and whatnot but what makes the fridge hear up from the outside? Also for freezers.
In: 0
“Cold” as a concept doesn’t really exist, it’s just the **absence** of heat. As such we can’t create cold, to make something cold we have to remove heat from it.
There’s several ways we can do that
(Skip this paragraph ig you don’t care about that)
for example we could create a chemical reaction that takes heat energy and converts it into chemical energy, this making stuff colder (there’s an amonia reaction that quickly cools down to around -20°C). Another way would be to take something that’s really cold already (for whatever reason) and have that absorb heat, increasing it’s own heat energy, but decreasing that of the space it’s in (that’s how ice cubes and cold packs work). Another possibility is to have a liquid evaporate, gas is a more energetic state than liquid, so as the liquid evaporates it takes some of the surrounding heat with it (this is why alcohol feels very cool when you spill it on your skin)
(Back to rleevance again)
However, the most efficient, and importantly, cyclical solution (meaning it doesn’t rely on a fuel that would have to be filled up again and again), that we found is called a “heat pump”, which is a device that can take heat energy from one place (inside your fridge/freezer) and transport it to somewhere else (the radiator on the back of your bridge), and sincs all the heat energy from inside is being moved to the outside, that results in the outside getting warm.
Latest Answers