Q1) Air cooling by water by a steady flow heat exchanger, as show below and kinetic and potential energies are both neglectfully small. Determine the flow rate of water and the heat exchange rate between the fluids. [Ans: mw = 5.04 kg/min; Q = 3.52 kW] Water flow in p= 550 kPa; T = 15 C Air flow out: Pa 1.0 MPa; T,1 = 35 C mair = 6.0kg/min Pa 1.0 MPa; T,1 = 70 C Heat exchanger Water exit: T= 25 C; Pw2 =500 kPa mw = ?