Q) The condenser of a steam power plant contains N = 1000 brass tubes (K= 110 W/m.K), each of inner and outer diameters, Di = 25 mm and D, 28 mm, respectively. Steam condensation on the outer surfaces of the tubes is characterized by a convection coefficient of ho 10000 W/m2.K. (a) If cooling water from a large lake is pumped through the condenser tubes at miw-400 kg/s, what is the overall heat transfer coefficient Uo based on the outer surface area of a tube? Properties of the water may be approximated as u = 9.60X 10-4 N.s/m2, k 0.60 W/m.K, and Pr 6.6. (b) If, after extended operation, fouling provides a resistance of R 10-4 m2.K/W at the inner surface, what is the yalue of U,?

Q) The condenser of a steam power plant contains N = 1000 brass tubes (K= 110 W/m.K), each of inner and outer diameters, Di = 25 mm and D, 28 mm, respectively. Steam condensation on the outer surfaces of the tubes is characterized by a convection coefficient of ho 10000 W/m2.K. (a) If cooling water from a large lake is pumped through the condenser tubes at miw-400 kg/s, what is the overall heat transfer coefficient Uo based on the outer surface area of a tube? Properties of the water may be approximated as u = 9.60X 10-4 N.s/m2, k 0.60 W/m.K, and Pr 6.6. (b) If, after extended operation, fouling provides a resistance of R 10-4 m2.K/W at the inner surface, what is the yalue of U,?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.46P

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