Repeat Prob. 11–133 for a heat transfer load of 50 MW.

Data from problem 133

The condenser of a large power plant is to remove 500 MW of heat from steam condensing at 30°C (h_fg = 2431 kJ/kg). The cooling is to be accomplished by cooling water (c_p = 4180 J/kg · K) from a nearby river, which enters the tubes at 18°C and leaves at 26°C. The tubes of the heat exchanger have an internal diameter of 2 cm, and the overall heat transfer coefficient is 3500 W/m² · K. Determine the total length of the tubes required in the condenser. What type of heat exchanger is suitable for this task?