**Solved Problem 6.5 - Adiabatic Efficiency of a
R134a Compressor**

Consider the R134a refrigerator compressor shown below.

a. Carefully plot the actual and isentropic compression processes on the

*h-s*diagram and indicate the actual and isentropic specific work done to drive the compressor on the plot.b. Using R134a refrigerant tables determine the specific work required to drive the compressor [53.9 kJ/kg].

c. Using R134a refrigerant tables determine the adiabatic efficiency of the compressor [η

_{C}= 92%].d. Discuss these results and determine if this is a feasible compressor design.

*Derive* all equations used
starting from the basic energy equation for a flow system and the
equation for adiabatic efficiency of a compressor.

**Solution Approach:**

**Discussion:** This is a
feasible compressor design - the adiabatic efficiency is higher than
we expected however within an acceptable range (less than around
95%),

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Engineering Thermodynamics by Israel
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