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 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.
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 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.
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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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 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.
Transcribed Image Text:Condenser
1500 kPa
High-stage
compressor
Intercooler
2
600 kPa
Evaporator
180 kW
-30°C
Low-stage
compressor
Figure 16-16 Intercooling system in Prob. 16-3.
3.
Transcribed Image Text:Condenser
3
1500 kPa
Flash-gas
compressor
2
600 kPa
Evaporator
180 kW
-30°C
Evaporator
compressor
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