**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 Urieli is licensed under a
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