Posted: Thu Jun 21, 2012 3:33 pm
wheels wrote:Cedaronics wrote:So it's (reducing humidity) not about reducing the amount of moisture in the unit, but cooling the air, Phil?
Not so much that, because reducing the temperature should actually increase the RH (if the amount of moisture stays the same), but for some reason when the fridge compressor is running the RH drops - I guess that's why fridges normally have low RH.
Phil
This is due to the way that refrigerators work. They cool by compressing liquid refrigerant and then allowing it to expand into a tube or plates. The expansion of the refrigerant absorbs energy in the form of heat, which makes the tube or plates cool down. In turn, water vapor in the air condenses on the tube or plates, which removes it from the air and lowers the RH.