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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Cooling water is required for following equipment in ammonia absorption plant

Absorber
Condenser, absorber and separator (rectifier)
Condenser
Evaporator

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Refrigeration and Air Conditioning
Vertical lines on pressure-enthalpy chart show constant

Entropy lines
Pressure lines
Temperature lines
Total heat lines

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Refrigeration and Air Conditioning
The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

Increase
Remain unaffected
May increase or decrease depending on the type of refrigerant used
Decrease

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Refrigeration and Air Conditioning
During heating and dehumidification process, dry bulb temperature

None of these
Decreases
Increases
Remains constant

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Refrigeration and Air Conditioning
A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of -23°C. The Carnot coefficient of performance of cycle will be

6
5
1.2
0.2

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Refrigeration and Air Conditioning
The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure, is called

Absolute humidity
Humidity ratio
Degree of saturation
Relative humidity

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