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If high pressure slows down the spoilage, can I use a pressure chamber to preserve food, rather than a refrigerator?


It's called high pressure processing or pascalization.


Yes absolutely. It's really cool.

https://en.wikipedia.org/wiki/Pascalization


It's also a nifty way to loosen meat from the shells of lobsters, crabs, etc.


This seems like it would be a great way to make long lasting milk which doesn't taste like UHT milk. Apparently it does work, but perhaps regulation hasn't caught up with it yet [0].

Edit: Seems that it may not be as effective in milk because of a pressure resistant enzyme [1]

0: https://www.hiperbaric.com/en/hpp-milk-high-pressure-process...

1: https://www.foodnavigator.com/Article/2022/03/11/hpp-milk-co...



Good luck peeking in the fridge every 5 mins like some do!

Maybe a pressure hatch is the answer to snacking


Or an aimed quick release to utilize a jet of pressure to make the snack shoot to a target location.

If hotdog+buns were kept under pressure, would they stay fresher while being carried in a t-shirt cannon-like form factor at a stadium?


If your pressure-feeder can forcibly whack your hotdog into a metal receptacle, it’ll create a cool scifi-like vapor effect. Very cyberpunk.


Yeah, as you add things it takes a photograph of it, then you can browse those. The new item is placed inside section A (short term), which is then pressurized. The item is them transferred to section B (long term) via automation.

On requesting an item the automated insides transfers it to section A, closes the hatch between A and B, then de-pressurizes A.


What happens if you combine both?


PV = nRT [0]. The (P)ressure is directly correlated with the (T)emperature. You would need to use a small (V)olume to balance the equation.

[0] https://en.wikipedia.org/wiki/Ideal_gas_law


To elaborate on the other comment, the ideal gas law isn't applicable when you can add or remove energy/mass to the system. There's no reason you can't pack a refrigerator sized chamber with enough air to be high pressure at a low temperature. Based on the equation, you get to choose what n is so you if you set T to a normal refrigerator temp of ~4C then you can vary n to get whatever P you want. I hope that made sense.


poor application of the gas law. There is no reason to treat the situation as adiabatic. Theoretical assumptions are important!




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