The required refrigeration capacity of a vapor compression refrigeration system (with R-22 as refrigerant) is 100 kW at –30oC evaporator temperature. Initially the system was single-stage with a single compressor compressing the refrigerant vapor from evaporator to a condenser operating at 1500 kPa pressure. Later the system was modified to a two- stage system operating on the cycle shown below. At the intermediate pressure of 600 kPa there is intercooling but no removal of flash gas. Find: a) Power requirement of the original single-stage system; b) Total power requirement of the two compressors in the revised two-stage system.
The required refrigeration capacity of a vapor compression refrigeration system (with R-22 as refrigerant) is 100 kW at –30oC evaporator temperature. Initially the system was single-stage with a single compressor compressing the refrigerant vapor from evaporator to a condenser operating at 1500 kPa pressure. Later the system was modified to a two- stage system operating on the cycle shown below. At the intermediate pressure of 600 kPa there is intercooling but no removal of flash gas. Find: a) Power requirement of the original single-stage system; b) Total power requirement of the two compressors in the revised two-stage 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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The required refrigeration capacity of a vapor compression refrigeration system (with R-22 as refrigerant) is 100 kW at –30oC evaporator temperature. Initially the system was single-stage with a single compressor compressing the refrigerant vapor from evaporator to a condenser operating at 1500 kPa pressure. Later the system was modified to a two- stage system operating on the cycle shown below. At the intermediate pressure of 600 kPa there is intercooling but no removal of flash gas. Find:
a) Power requirement of the original single-stage system;
b) Total power requirement of the two compressors in the revised two-stage system.
Transcribed Image Text:condenser
1500 kPa
-18°C
evaporator
(100 kW)
600 kPa
intercooler
2nd stage
compressor
1st stage
compressor
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