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Q6) 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 condensing pressure of 1500 kPa. Later the system is revised to a two-stage compression operating on the cycle shown in the Figure 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. (a) 71.23 kW and (b) 70.73 kW). Conden I500 Intercoole Eveporator Lowae compressor

Q6) 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 condensing pressure of 1500 kPa. Later the system is revised to a two-stage compression operating on the cycle shown in the Figure 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. (a) 71.23 kW and (b) 70.73 kW). Conden I500 Intercoole Eveporator Lowae compressor

Elements Of Electromagnetics
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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Q6) 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 condensing pressure of 1500 kPa. Later the system is revised to a two-stage compression operating on the cycle shown in the Figure 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. (a) 71.23 kW and (b) 70.73 kW). Condenser 1500 KP lighstage compressor Intercooler 600 Evaporator 180 W 30°C Lowstage compressor
Transcribed Image Text:Q6) 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 condensing pressure of 1500 kPa. Later the system is revised to a two-stage compression operating on the cycle shown in the Figure 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. (a) 71.23 kW and (b) 70.73 kW). Condenser 1500 KP lighstage compressor Intercooler 600 Evaporator 180 W 30°C Lowstage compressor
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