Consider an ideal vapor compression refrigeration cycle. If the throttling process is replaced by an isentropic expansion process, keeping all the other processes unchanged, which one of the following statements is true for the modified cycle?
Coefficient of performance is higher than that of the original cycle.
An isentropic expander lowers the evaporator-inlet enthalpy relative to throttling, increasing refrigeration per unit mass. It also recovers work, reducing net work input when recovered. Both effects give a higher COP.
Important Questions from Vapour Compression (V-C) Cycle
A refrigeration plant works on an ideal vapour-compression refrigeration cycle with refrigerant as R-12 and develops a refrigeration capacity of 10 TR. If the refrigeration effect produced is 100 kJ/kg, what will be the mass flow rate of the refrigerant? [Assuming, 1 TR = 3.5 kW]
In vapour compression refrigeration system, the effect of liquid refrigerant under cooling is to
If vapour is NOT superheated after compression, it is called ________.
The amount of heat removed in the evaporator per unit mass flow of refrigerant is called:
In a vapor compression system, the highest temperature of the refrigerant during the cycle occurs after
