Consider an ice-producing plant that operates on the ideal vapor-compression refrigeration cycle and uses refrigerant-134a as the working fluid. The refrigeration cycle operating conditions require an evaporator pressure of 140 kPa and the condenser pressure of 1200 kPa. Cooling water flows through the water jacket surrounding the condenser and is supplied at the rate of 200 kg/s. The cooling water has a 10°C temperature rise as it flows through the water jacket. To produce ice, potable water is supplied to the chiller section of the refrigeration cycle. For each kg of ice produced, 333 kJ of energy must be removed from the potable water supply.

(a) Sketch the hardware for all three working fluids of this refrigerant–ice making system and the T-s diagram for refrigeration cycle.

(b) Determine the mass flow rate of the refrigerant, in kg/s.

(c) Determine the mass flow rate of the potable water supply, in kg/s.