W = Water at an average temperature of 110°C and an average velocity of 3.5” flows through a 5 m long stainless-steel tu

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W Water At An Average Temperature Of 110 C And An Average Velocity Of 3 5 Flows Through A 5 M Long Stainless Steel Tu 1 (66.28 KiB) Viewed 65 times

W = Water at an average temperature of 110°C and an average velocity of 3.5” flows through a 5 m long stainless-steel tube (k = 14.2 m) in a boiler. The inner and outer diameters of the tube are Di = 1.0 cm and D. = 1.4 cm, respectively. The convection heat transfer coefficient at the outer surface of the tube where boiling is taking place is h, = 84007 W m2K A) Determine the overall heat transfer coefficient U of this boiler based on the inner surface area of the tube. m2K B) Assume a fouling factor Re,i = 0.0005" on the inner surface of the tube. Under these conditions what is the overall heat transfer coefficient U? W