Overview
Parameters of the Chiller • Refrigerant: R-134a • Evaporator Pressure: 2 bar • Condenser Pressure: 20 bar • Water Inlet to Chiller: 12°C • Water Outlet from Chiller: 6°C • Ambient Temperature: 38°C • Assume chilled water flow rate: 10 kg/s • Cp for water: 4.18 kJ/Kg.K Based on these values and your expertise in Thermo 2: (a) Calculate the Carnot efficiency of the Chiller; (b) The actual COP; (c) Perform an Energy Balance in Evaporator, Condenser and Compressor; (d) Evaluate the mass flow rate of the refrigerant; (e) Determine the isentropic efficiency of the compressor; (f) Plot the system in a P,h diagram. (g) Suggest some improvements that can increase the COP in this PMU Chiller?