In the Refrigerant 12 system shown in the diagram, the evaporator pressure is 138 kPaa and the condensing pressure is 930 kPaa. The system uses flash gas removal but no intercooling. a. Calculate the compressor power per kW of refrigeration for the standard vapor-compression cycle. b. If a flash tank is installed to remove the flash gas at 345 kPaa from the expansion process and this flash gas is compressed back to 930 kPaa as shown in the diagram, calculate the total compressor power in kW per kW of refrigeration.
In the Refrigerant 12 system shown in the diagram, the evaporator pressure is 138 kPaa and the condensing pressure is 930 kPaa. The system uses flash gas removal but no intercooling. a. Calculate the compressor power per kW of refrigeration for the standard vapor-compression cycle. b. If a flash tank is installed to remove the flash gas at 345 kPaa from the expansion process and this flash gas is compressed back to 930 kPaa as shown in the diagram, calculate the total compressor power in kW per kW of refrigeration.
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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Question
In the Refrigerant 12 system shown in the diagram, the evaporator pressure is 138 kPaa and the condensing
pressure is 930 kPaa. The system uses flash gas removal but no intercooling.
a. Calculate the compressor power per kW of refrigeration for the standard vapor-compression cycle.
b. If a flash tank is installed to remove the flash gas at 345 kPaa from the expansion process and this flash
gas is compressed back to 930 kPaa as shown in the diagram, calculate the total compressor power in
kW per kW of refrigeration.
Transcribed Image Text:a) For the standard vapar- compression cyele:
P
930 kPaa
138 kraa
Transcribed Image Text:condenser
HSC
Flash
Tank
930 kPaa
--
138 kPoa
8
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