A single compressor using R-12 as refrigerant has three evaporators of  capacity 30TR, 20TR and10TR.The temperature in the three evaporators is to be  maintained at -10 oC, 5 oC and 10 oC respectively. The condenser pressure is 9.609  bar. The liquid refrigerant leaving the condenser is subcooled to 30oC. The vapour  leaving the evaporators is dry and saturated. Assuming isentropic compression,  calculate (a) the mass of refrigerant flowing through each evaporator; (b) the  power required to drive the compressor; and (c) C.O.P. of the system.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A single compressor using R-12 as refrigerant has three evaporators of 
capacity 30TR, 20TR and10TR.The temperature in the three evaporators is to be 
maintained at -10 oC, 5 oC and 10 oC respectively. The condenser pressure is 9.609 
bar. The liquid refrigerant leaving the condenser is subcooled to 30oC. The vapour 
leaving the evaporators is dry and saturated. Assuming isentropic compression, 
calculate (a) the mass of refrigerant flowing through each evaporator; (b) the 
power required to drive the compressor; and (c) C.O.P. of the system.

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