A geothermal heat pump operating at steady state with Refrigerant-22 as the working fluid is shown schematically in Fig. P10.36. The heat pump uses 55°F water from wells as the thermal source. Operating data are shown on the figure for a day in which the outside air temperature is 20°F. Assume adiabatic operation of the compressor. For the heat pump, determine 3
a. the volumetric flow rate of heated air to the house, in ft /min. b. the isentropic compressor efficiency.
c. the compressor power, in horsepower.
d. the coefficient of performance.
e. the volumetric flow rate of water from the geothermal wells, in gal/min.
For T = 20°F, perform a full exergy accounting of the compressor 0
power input, and devise and evaluate a second law efficiency for the heat pump system.
