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haruku63 t1_itfhsmp wrote

Reply to comment by the_fungible_man in decompression of liquids in outer space by gumby_the_2nd

The process was used in the Apollo missions to cool the LM and the EVA suits. Water ran through a porous metal block exposed to the vacuum. Water first sublimated, then an ice crust. Turning water into vapor needs a lot of energy, thus the method is very effective.

The method is still used with EVA suits.

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