AS& Heat Transfer in Steam Heater Water at an average of 70°F is fiowing in a 2-in. steel pipe, schedule 40. Steam at 220°F is condensing on the outside of the pipe. The con vective coefficient for the water inside the pipe is A = 500 btu/h ft2.°F and the con- densing steam cocfficient on the outside is h = 1500 (a) Calculate the heat loss per unit length of1 ft of pipe using resistances. (b) Repcat, using the overall based on the inside area Ap (c) Repeat, using U 13.2- Ans. (a)q= 26 710 btu/h (7.828 kW). (b) Uj = 329.1 btu/h-ft2."F (1869 W/m2. K), (c) U.= 286.4 btu/h ft2.°F (1626 W/m2. K)
AS& Heat Transfer in Steam Heater Water at an average of 70°F is fiowing in a 2-in. steel pipe, schedule 40. Steam at 220°F is condensing on the outside of the pipe. The con vective coefficient for the water inside the pipe is A = 500 btu/h ft2.°F and the con- densing steam cocfficient on the outside is h = 1500 (a) Calculate the heat loss per unit length of1 ft of pipe using resistances. (b) Repcat, using the overall based on the inside area Ap (c) Repeat, using U 13.2- Ans. (a)q= 26 710 btu/h (7.828 kW). (b) Uj = 329.1 btu/h-ft2."F (1869 W/m2. K), (c) U.= 286.4 btu/h ft2.°F (1626 W/m2. K)
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.
Chapter8: Natural Convection
Section: Chapter Questions
Problem 8.29P
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