Solved Problem 6.5 - Adiabatic Efficiency
of a R134a Compressor
Consider the R134a refrigerator compressor
- 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 [ηC = 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.
is a feasible compressor design - the adiabatic efficiency is
higher than we expected however within an acceptable range (less
than around 95%),