A concentrated solar power plant receives the energy from molten salt coming in at 560◦C and leaving at 300◦C in a counter flow heat exchanger where the water comes in at 3MPa, 60◦Cand leaves at 450◦C, 3 MPa. The molten salt has 5 kg/s flow with Cp = 1.5 kJ/kg-K. What is the possible water flow rate and the rate of energy transfer? Find the second-law efficiency of this heat exchanger.