Unformatted text preview: n a reversible manner until Reconsider Prob. 7–39. Using EES (or other)
software, evaluate and plot the work done by the
refrigerant as a function of final pressure as it varies from 0.8
MPa to 0.4 MPa. Compare the work done for this process to
one for which the temperature is constant over the same pressure range. Discuss your results.
7–41 Refrigerant-134a enters an adiabatic compressor as saturated vapor at 140 kPa at a rate of 2 m3/min and is compressed
to a pressure of 700 kPa. Determine the minimum power that
must be supplied to the compressor.
7–42E Steam enters an adiabatic turbine at 800 psia and
900°F and leaves at a pressure of 40 psia. Determine the maximum amount of work that can be delivered by this turbine.
7–43E Reconsider Prob. 7–42E. Using EES (or other)
software, evaluate and plot the work done by
the steam as a function of final pressure as it varies from 800
psia to 40 psia. Also investigate the effect of varying the turbine inlet temperature from the saturat...
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