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.
Chapter10: Heat Exchangers
Section: Chapter Questions
Problem 10.51P
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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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fefc2b5ca-13f8-46e2-9b9a-5eecf84c7926%2F2f45dcd3-4af2-4153-a617-31233beebd4b%2Fohrol4m_processed.jpeg&w=3840&q=75)
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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