b) A refrigeration system using R12 as refrigerant consists of three evaporators of capacities 20 TR at -3°C, 30 TR at 0°C and 10 TR at 5°C. The vapors leaving the three evaporators are dry saturated. The system is provided with individual compressors and multiple expansion valves. The condenser temperature is 40°C and the liquid leaving the condenser is saturated. Assuming isentropic compression in each compressor, find: i. The mass of the refrigerant flowing through each evaporator. ii. The power required to drive the system. iii. The COP of the system. Draw the cycle and system diagram.

b) A refrigeration system using R12 as refrigerant consists of three evaporators of capacities 20 TR at -3°C, 30 TR at 0°C and 10 TR at 5°C. The vapors leaving the three evaporators are dry saturated. The system is provided with individual compressors and multiple expansion valves. The condenser temperature is 40°C and the liquid leaving the condenser is saturated. Assuming isentropic compression in each compressor, find: i. The mass of the refrigerant flowing through each evaporator. ii. The power required to drive the system. iii. The COP of the system. Draw the cycle and system diagram.

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

Chapter3: Refrigeration And Refrigerants

Section: Chapter Questions

Problem 10RQ: If the evaporating pressure was 76 psig for R-22 and the compressor inlet temperature was 65F, what...

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