Vapor compression cycle performance

1- Effect of evaporation pressure “ or temperature”

for the following figs:R-22, 4.5% clearance, 50 L/s

displacement rate and 35 C condensing temperature

a - Volumetric efficiency and mass flow rate

B- Specific work and compressor power

C- Refrigeration effect and refrigeration capacity

D- C.O.P and volume flow rate/unit capacity

2- Effect of condensing pressure “ temperature”

• for the following figs:R-22, 4.5% clearance, 50

L/s displacement rate and -20 C evaporating

temperature

A- Volumetric efficiency and mass flow rate

B- Refrigeration effect and refrigeration capacity

C- Specific work and compressor power

3- Effect of pressure ratio- 1- volumetric efficiency

4- Variation of discharge temperature with condensing pressure” temperature”

isentropic compression from saturated vapor at 0 C