An ideal vapor-compression refrigeration cycle with ammonia as the working fluid has an evaporator temperature of -30°C and a condenser pressure of 10 bar. Saturated vapor enters the compressor and saturated liquid exits the condenser. The mass flow rate of the refrigerant is 3 kg/min. Determine: (a) the coefficient of performance. (b) the refrigerating capacity, in tons.

An ideal vapor-compression refrigeration cycle with ammonia as the working fluid has an evaporator temperature of -30°C and a condenser pressure of 10 bar. Saturated vapor enters the compressor and saturated liquid exits the condenser. The mass flow rate of the refrigerant is 3 kg/min. Determine: (a) the coefficient of performance. (b) the refrigerating capacity, in tons.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter28: Special Refrigeration Applications

Section: Chapter Questions

Problem 15RQ: Why is two-stage compression popular for extra-low-temperature refrigeration systems?

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Question

An ideal vapor-compression refrigeration cycle
with ammonia as the working fluid has an
evaporator temperature of -30°C and a condenser
pressure of 10 bar. Saturated vapor enters the
compressor and saturated liquid exits the
condenser. The mass flow rate of the refrigerant is
3 kg/min.
Determine:
(a) the coefficient of performance.
(b) the refrigerating capacity, in tons.

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