Refrigeration and Air Conditioning
The capillary tube is not used in large capacity refrigeration systems because

Capacity control is not possible
It is made of copper
Required pressure drop cannot be achieved
Cost is too high

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Refrigeration and Air Conditioning
The coefficient of performance of Electrolux refrigerator is the ratio of

Heat supplied by the gas burner to the heat absorbed by the evaporator
Heat absorbed by the evaporator minus the heat supplied by the gas burner to the heat absorbed by the evaporator
Heat absorbed by the evaporator to the heat supplied by the gas burner
Heat supplied by the gas burner minus the heat absorbed by the evaporator to the heat supplied by the gas burner

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Refrigeration and Air Conditioning
The reciprocating refrigerant compressors are very suitable for

Large displacements and low condensing pressures
Large displacements and high condensing pressures
Small displacements and low condensing pressures
Small displacements and high condensing pressures

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