(2) A two-stage cascade refrigeration system uses ammonia as the refrigerant. The mass flow rate in the high-pressure loop is 0.10 kg/s. The condenser saturated temperature is 38°C and the evaporator temperature is -40°C. The cascade condenser is a direct-contact type. Determine (a) the refrigerating effect in tons, (b) the power required, and (c) the COP. Ans.(a) 26.19 tons, (b) 37.22 kW, (c) 2.48

(2) A two-stage cascade refrigeration system uses ammonia as the refrigerant. The mass flow rate in the high-pressure loop is 0.10 kg/s. The condenser saturated temperature is 38°C and the evaporator temperature is -40°C. The cascade condenser is a direct-contact type. Determine (a) the refrigerating effect in tons, (b) the power required, and (c) the COP. Ans.(a) 26.19 tons, (b) 37.22 kW, (c) 2.48

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 13RQ: The subcooling temperature in a condenser can be measured by taking the difference between the A....

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