Task 4: Heat pump process in Ph diagram II

In a heat pump, the temperature in the evaporator is constantly equal to 0C while the pressure in the condenser

is constantly equal to 0.8 MPa. The specific enthalpy at the inlet and outlet of the compressor is

250 kJ/kg and 300 kJ/kg, respectively. A Ph chart for the relevant refrigerant is reproduced

below.

Use the diagram and the information you've been given to respond to the following subtasks.

a) Determine the temperature in the capacitor using the Ph chart. (An approximate value is good

enough.)

b) Determine the pressure in the evaporator using the Ph chart. (An approximate value is good enough.)

c) Draw the circuit process into the Ph diagram above.

d) How much heat is absorbed in the evaporator per kilogram of refrigerant?

Assume a reversible and isobaric process.

e) How much heat is emitted in the condenser per kilogram of refrigerant?

Assume a reversible and isobaric process.

f) Calculate the COP of the heat pump.