determine the amount of power generated.

A vapor compression refrigerator using R134a as the refrigerant operates under the following conditions: The refrigerant condenses at 50°C and is then sub-cooled by 10°C to 30°C before expansion. After an isenthalpic expansion, the refrigerant evaporates at -20°C and then superheated by 10°C to 0°C before compression. The refrigerant is compressed to 70°C with entropy of 1.0 kJ/kg.K at the end of the compression. a)With reference to the above operating conditions, draw the cycle on the R134a p-h diagram. b)Calculate the specific refrigerating effect at the evaporating temperature of -20°C. c)Calculate the work input for the compression process. d)Prove the vapor compression is not an isentropic process. e) Calculate the COP of the cycle. f)To produce 5kW cooling, what is the refrigerant flow rate required?

In a gas turbine, the temperature of the working fluid at inlet to the compressor is 289 K and outlet 438 K. At inlet to the turbine, the working fluid has a temperature of 1,064 K and exhausts from the turbine at a tempeature of 739 K. The specific heat capacity of the working fluid at constant pressure is 1.005 kJ/kg.K. Determine the efficiency of the plant