Refrigeration and Air Conditioning
A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be

Lack of cooling water
Water temperature being high
All of these
Dirty condenser surface

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Refrigeration and Air Conditioning
It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature to 50% relative humidity and 25° C dry bulb temperature (room condition). The practical arrangement will be

Cooling and humidification
Dehumidification
Cooling and dehumidification
Dehumidification and pure sensible cooling

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