5.30 Water is being heated in a STHX by condensing steam. The water is flowing in the tubes at a rate of 0.8 kg/s. The water enters the heat exchanger at 15°C and leaves at 58°C. The steam condenses on the shell side of the heat exchanger at a condensing pressure of 110 kPa. Determine the following:

a. Mass flow rate of the condensing steam (kg/s)

b. Heat transfer rate between the water and condensing steam (kW)

c. UA product of the heat exchanger (kW/K)

Consider a situation where the cold water inlet temperature to the heat exchanger is adjusted to 20°C while its flow rate (0.8 kg/s) remains constant.

For this scenario, determine the following:

d. Outlet temperature of the cold water (°C)

e. Heat transfer rate between the water and condensing steam (kW)