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Q6. Saturated steam at a pressure of 0.38551 bar enters into the heat exchanger. The rate of heat transfer is 75 MW.

The condenser has a total of 12000 tubes arranged in a single pass. EACH tube has an outside diameter of 16 mm and a length of 3.7 m.

Cooling water enters the tubes at a temperature of 25℃ and leaves at 41℃.

Determine EACH of the following:

(a) the mass flow rate of steam; (4)

(b) the mass flow rate of cooling water; (2)

(c) sketch a diagram of temperature change across the heat exchanger; (2)

(d) the logarithmic mean temperature difference; (4)

(e)the overall heat transfer coefficient, based on the tube outside area. (4)

Note: The C_p of water is 4.18 kJ/kgK