A large heat exchanger has several columns of tubes, with 33 tubes in each column. The outer

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A large heat exchanger has several columns of tubes, with 33 tubes in each column. The outer diameter of the tubes is 1.5 cm. Saturated steam at 50°C condenses on the outer surfaces of the tubes, which are maintained at 20°C. Determine
(a) The average heat transfer coefficient

(b) The rate of condensation of steam per m length of a column.

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