275.0L/min(0.2750m3/min) of a process fluid enters at 30C on the tube side of a shell and tube heat exchanger. 16.7kg/min of saturated steam at 250kPa absolute and 127.4C condenses on the shell side and exits as saturated liquid at the same temperature and pressure. Properties of process fluid: Cp=3.25kJ/(kg)(K), density =825kg/m3 Properties of steam at given conditions: hgg=2182kJ/kg (a) (12) Determine the exit temperature of the process fluid. (b) (12) Determine the required heat transfer area (m2) for this heat exchanger if the overall heat transfer coefficient is U0=1150W/m2K. (c) (6) Explain briefly why it does not matter whether the exchanger is countercurrent, parallel, or multiple tube pass flow. (d) (10) In practice, a heat exchanger like this one might have some type of process control system manipulating flow rates to maintain a constant output temperature of the process fluid as steam conditions fluctuate. Suppose that the steam supply system has a disruption which causes the pressure to drop from 250kPa to 220kPa. At this pressure, the steam remains saturated with T=123.3C and hgg=2193kJ/kg. The input temperature of the process fluid remains the same, and the process control system changes the flow rates in order to maintain the same process fluid output temperature. Assume that the heat transfer coefficient remains constant, and obviously the area remains constant since it is the same heat exchanger. Determine the flow rate of process fluid that can be processed for this case, and the flow rate of steam required if all the steam condenses to saturated liquid. (Hint: A good starting point is to consider the driving force temperature Tlm )