I've read the wikipedia article on how they work, but I just cant understand how the evaporator functions without some sort of one way valve or something...
The article establishes that the ammonia is liquid at room temperature with the pressure used, so why does it evaporate?
Submitted September 29, 2015 at 03:49AM by Siggy_23 http://ift.tt/1FFOYb2 askscience
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