Question

Q.2) Refrigerant R134a is compressed by a compressor of refrigerator. Inlet pressure and temperature of refrigerant is 0.2 MPa and 0 °C, respectively. The exit pressure is measured as 1 MPa. Mass flow rate of the refrigerant is 0.05 kg/s. Case a) Assuming compression process is isentropic, determine; a) Exit temperature of the refrigerant. b) Work consumed by the compressor c) Draw the process in P-h diagram Case b) Assuming exit temperature is 75 °C, determine; a) Work consumed by the compressor b) Entropy generation c) Draw the process in T-s diagram d) Increase the compressor inlet temperature up to 20 °C parametrically and see the effect of temperature on work consumption. Please comment the result. e) Solve the problem for R1234yf and R32 refrigerants. Please comment the result.

          Q.2) Refrigerant R134a is compressed by a
compressor of refrigerator. Inlet pressure and
temperature of refrigerant is 0.2 MPa and 0 °C,
respectively. The exit pressure is measured as 1
MPa. Mass flow rate of the refrigerant is 0.05 kg/s.
Case a) Assuming compression process is
isentropic, determine;
a) Exit temperature of the refrigerant.
b) Work consumed by the compressor
c) Draw the process in P-h diagram
Case b) Assuming exit temperature is 75 °C,
determine;
a) Work consumed by the compressor
b) Entropy generation
c) Draw the process in T-s diagram
d) Increase the compressor inlet temperature up to 20 °C parametrically and see
the effect of temperature on work consumption. Please comment the result.
e) Solve the problem for R1234yf and R32 refrigerants. Please comment the
result.

Q.2) Refrigerant R134a is compressed by a
compressor of refrigerator. Inlet pressure and
temperature of refrigerant is 0.2 MPa and 0 °C,
respectively. The exit pressure is measured as 1
MPa. Mass flow rate of the refrigerant is 0.05 kg/s.
Case a) Assuming compression process is
isentropic, determine;
a) Exit temperature of the refrigerant.
b) Work consumed by the compressor
c) Draw the process in P-h diagram
Case b) Assuming exit temperature is 75 °C,
determine;
a) Work consumed by the compressor
b) Entropy generation
c) Draw the process in T-s diagram
d) Increase the compressor inlet temperature up to 20 °C parametrically and see
the effect of temperature on work consumption. Please comment the result.
e) Solve the problem for R1234yf and R32 refrigerants. Please comment the
result.

Added by Jason P.

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