Saturated steam at 54.5°C condenses on the outside surface of a 25.4 mm outer diameter 3.66 m long vertical tube maintai

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Saturated Steam At 54 5 C Condenses On The Outside Surface Of A 25 4 Mm Outer Diameter 3 66 M Long Vertical Tube Maintai 1 (43.56 KiB) Viewed 55 times

Saturated steam at 54.5°C condenses on the outside surface of a 25.4 mm outer diameter 3.66 m long vertical tube maintained at a uniform temperature of 43.3°C. Because of the occurrence of ripples on the surface of the condensate film the actual heat transfer coefficient is about 20% higher than that obtained by Nusselt's equation. Determine the average condensation heat transfer coefficient over the entire length of the tube and the rate of condensate flow at the bottom of the tube. Check that the flow is laminar. The properties of condensate at 48.9°C are hpg = 2372.4 kJ/kg, k = 0.642 W/mK, p = 988.4 kg/mº and j = 0.558 x 10-kg/ms.