A single compressor using ammonia as refrigerant has three evaporators of capacity 30 TR, 20 TR and 10 TR. The temperature in the three evaporators is to be maintained at -10°C, 5°C and 10°C, respectively. The system is provided with individual expansion valve and back pressure valves. The condenser temperature is 40°C. Assume isentropic compression: a. Draw the P-h diagram. b. What is the mass of refrigerant flowing through each evaporator? c. What is the power required to drive the compressor? d. What is the COP of the system?
A single compressor using ammonia as refrigerant has three evaporators of capacity 30 TR, 20 TR and 10 TR. The temperature in the three evaporators is to be maintained at -10°C, 5°C and 10°C, respectively. The system is provided with individual expansion valve and back pressure valves. The condenser temperature is 40°C. Assume isentropic compression: a. Draw the P-h diagram. b. What is the mass of refrigerant flowing through each evaporator? c. What is the power required to drive the compressor? d. What is the COP of the system?
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
Chapter47: High-pressure, Low-pressure, And Absorption Chilled-water Systems
Section: Chapter Questions
Problem 9RQ: The approach temperature for the evaporator is A. the difference between the suction and head...
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A single compressor using ammonia as refrigerant has three evaporators of capacity 30 TR, 20 TR and 10 TR. The temperature in the three evaporators is to be maintained at -10°C, 5°C and 10°C, respectively. The system is provided with individual expansion valve and back pressure valves. The condenser temperature is 40°C. Assume isentropic compression:
a. Draw the P-h diagram.
b. What is the mass of refrigerant flowing through each evaporator?
c. What is the power required to drive the compressor?
d. What is the COP of the system?
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