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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Refrigeration is about phase change and requires electricity to pump a fluid through a condenser and an evaporator.
Ice boxes were just well insulated boxes full of ice.
I’m not familiar with evaporative coolers in the 1800’s, but if they existed, I can’t see how they would work without a fan, which requires electricity.
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