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The condenser of a steam power plant contains N 1000 brass
Chapter , Problem 11.7(choose chapter or problem)
The condenser of a steam power plant contains N 1000 brass tubes (kt 110 W/m K), each of inner and outer diameters, Di 25 mm and Do 28 mm, respectively. Steam condensation on the outer surfaces of the tubes is characterized by a convection coefficient of ho 10,000 W/m2 K. (a) If cooling water from a large lake is pumped through the condenser tubes at , 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 9.60 , and Pr 6.6. (b) If, after extended operation, fouling provides a resistance of at the inner surface, what is the value of Uo? (c) If water is extracted from the lake at and 10 kg/s of steam at 0.0622 bars are to be condensed, what is the corresponding temperature of the water leaving the condenser? The specific heat of the water is 4180 .
Questions & Answers
QUESTION:
The condenser of a steam power plant contains N 1000 brass tubes (kt 110 W/m K), each of inner and outer diameters, Di 25 mm and Do 28 mm, respectively. Steam condensation on the outer surfaces of the tubes is characterized by a convection coefficient of ho 10,000 W/m2 K. (a) If cooling water from a large lake is pumped through the condenser tubes at , 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 9.60 , and Pr 6.6. (b) If, after extended operation, fouling provides a resistance of at the inner surface, what is the value of Uo? (c) If water is extracted from the lake at and 10 kg/s of steam at 0.0622 bars are to be condensed, what is the corresponding temperature of the water leaving the condenser? The specific heat of the water is 4180 .
ANSWER:Step 1 of 4
Part (a)
At the given value of pressure 0.0622 bar for saturated liquid water the properties are obtained, that is saturation temperature is 
The Reynolds number can be calculated as:
