Refrigeration and Air Conditioning
For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then

Smaller cabinet should be used
Perfectly tight vapour seal should be used
Bigger cabinet should be used
Refrigerant with lower evaporation temperature should be used

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Refrigeration and Air Conditioning
In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature

Which is lower than the dew point temperature of the incoming stream
Which lies between the wet bulb and dew point temperatures of the incoming stream
Of adiabatic saturation of incoming stream
Which lies between the dry bulb and wet bulb temperatures of the incoming stream

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