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Yeah there are those machines that like instantly cool your soda can or make ice cream instantly supposedly. They just bathe it in ice and salt water for some time basically
I don’t know if it’s a stupid question or not but I have been wondering this myself for years. :)
The reverse microwave. I heard you need a LOT of freon.
Falcoooone
Removing heat energy is what your freezer does, by transferring it outside of the freezer box.
You can’t just remove heat by adding electromagnetic energy. Absorbing energy from the electromagnetic radiation makes heat.
Edit: whelp, TIL
The magnetocaloric effect can do this. Instead of the target absorbing energy, the magnet does. The magnet heats up and the target cools.
If you're very careful you can remove heat with electromagnetic energy.
Think of heat like someone on a rope swing, and electromagnetic energy as a push.
If you time, and angle your pushes very carefully you can slow the person on the swing. But it's much easier to speed them up. Same with electromagnetic energy.
Fridge, well. But now I'm wondering if that would be possible with electromagnetic radiation somehow. Would it be possible to direct infrared waves away from a closed chamber, making the inside cooler? Like a semipermeable membrane in shoes with water vapor?
Besides freezers I don’t think there’s any technology we know that could do this on a wide range of substances. But freezers are neat - they move heat from the inside to the outside and as they are insulated they can reach temperatures 40-50 degrees (Celsius) under their surroundings
You can get "freezers" that will put part of their inside down to 250+c below their surroundings. (Helium cryocoolers)
This is cool! Where do I get one and what’s the power usage?
Semiconductor mfg firesales.
Or if you want to spend the 20+k you can buy from the manufacturer.
Oh power usage.... that depends how much you need to cool down, and what setup you have. But usually they're 3 phase and lots of amps......