16-3 In a refrigerant 22 refrigeration system the capacity is 180 kW at a temperature of -30°C. The vapor from the evaporator is pumped by one compressor to the con- densing pressure of 1500 kPa. Later the system is revised to a two-stage compression operating on the cycle shown in Fig. 16-16 with intercooling but no removal of flash gas at 600 kPa. (a) Calculate the power required by the single compressor in the original system. (b) Calculate the total power required by the two compressors in the revised system. Ans. 70.9 kW Condenser 1500 kPa 3 High-stage compressor Intercooler 2 600 kPa Evaporator 180 kW -30°C Low-stage compressor Figure 16-16 Intercooling system in Prob. 16-3.

16-3 In a refrigerant 22 refrigeration system the capacity is 180 kW at a temperature of -30°C. The vapor from the evaporator is pumped by one compressor to the con- densing pressure of 1500 kPa. Later the system is revised to a two-stage compression operating on the cycle shown in Fig. 16-16 with intercooling but no removal of flash gas at 600 kPa. (a) Calculate the power required by the single compressor in the original system. (b) Calculate the total power required by the two compressors in the revised system. Ans. 70.9 kW Condenser 1500 kPa 3 High-stage compressor Intercooler 2 600 kPa Evaporator 180 kW -30°C Low-stage compressor Figure 16-16 Intercooling system in Prob. 16-3.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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