A dehumidifier is not the refrigeration cycle in reverse — it is the ordinary cooling cycle wired to wring water out of air and then hand the heat back. The psychrometrics that make it work, why desiccants win in a cold basement, how capacity ratings lie, and what variable-speed actually buys you.
Refrigeration
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How a Dehumidifier Actually Works -
The Refrigeration Cycle A refrigerator, an air conditioner, and a heat pump are the same machine run in different directions — a vapor-compression loop that pumps heat against the temperature gradient by exploiting the phase change of a refrigerant. The four stages and the latent-heat trick that makes them work, why pressure is the lever, the refrigerant transition to low-GWP fluids, why COP beats 100%, and how to read the cycle on a pressure-enthalpy diagram.