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The condenser of a thermoelectric plant is a shell and tube heat exchanger consisting of a shell...

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Mechanical Engineering

Thecondenser of a thermoelectric plant is a shell and tube heatexchanger consisting of a shell and 30,000 tubes, each of whichexecutes two steps. The tubes are thin- walled with D = 25 mm, andthe steam condenses on its outer surface with a convectioncoefficient of ho = 11 kW/m2 K. The heat transfer that theexchanger must perform is 2,000 MW, and this is carried out bypassing cooling water through the pipes at the rate of 30,000 kg/s(the flow per tube is 1 kg/s). The water enters 20 oC, while thesteam condenses at 50 oC. Calculate the length of the tube that isrequired per step.

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