How did refrigeration work before electricity was widespread?

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I’m curious about the really old ice boxes, but I was really wondering about the ones from the 1800s that relied on coolant and some form of evaporation.

I can’t really picture how old is physics work without electricity.

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Anonymous 0 Comments

The earliest closed-system vapor refrigeration systems were powered by steam engines. The steam engine would run the pump and the pump would move the refrigerant through the sealed system.

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