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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,?

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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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 value of Uo? nintoined at uniform temperatures of T1 = 700K
Transcribed Image Text: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 value of Uo? nintoined at uniform temperatures of T1 = 700K
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