Homework Answers
Solution:-
c) Temprature between 2 and 3 is due to compression of reffrigerant in the compressor which is given by
When wo cool it in condensor temperature decreases to
T3 saturated vapour and phase change occcure to
saturated liquid withconstant tempreature. After that it is passed
to expension valve where temperature and pressure decreeases at
constant enthalpy (
).
At exit of expension valve tempreature is 
and 
Then heated in evaporator to saturated vapour phase and then
passed to compressor.
From above discussion it is clear that 
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compressor efficiency, defined as:
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