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 dehumidification
Cooling and humidification
Dehumidification
Dehumidification and pure sensible cooling

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Refrigeration and Air Conditioning
A one tonne refrigerating machine means that

One tonne is the total mass of machine
One tonne of water can be converted into ice
One tonne refrigerant is used
One tonne of ice when melts from and at 0° C in 24 hours, the refrigeration effect is equivalent to 210 kJ/min

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