Steam flows in an insulated pipe at a temperature 130 C. The inside heat transfer coefficient is 79 W/m2-K and the outside coefficient is 15 W/m2-K. The pipe is mild steel (k=57 W/m-K) and has an inside radius of 50 mm and an outside radius of 57 mm. the pipe is covered with a 25.4 mm layer( k=0.09 W/m-K). Determine the overall heat transfer coefficient if the surrounding air temperature is 21.1 C.

Steam flows in an insulated pipe at a temperature 130 C. The inside heat transfer coefficient is 79 W/m2-K and the outside coefficient is 15 W/m2-K. The pipe is mild steel (k=57 W/m-K) and has an inside radius of 50 mm and an outside radius of 57 mm. the pipe is covered with a 25.4 mm layer( k=0.09 W/m-K). Determine the overall heat transfer coefficient if the surrounding air temperature is 21.1 C.

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.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.64P

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Question

Steam flows in an insulated pipe at a temperature 130 C. The inside
heat transfer coefficient is 79 W/m2-K and the outside coefficient is 15
W/m2-K. The pipe is mild steel (k=57 W/m-K) and has an inside radius
of 50 mm and an outside radius of 57 mm. the pipe is covered with a
25.4 mm layer( k=0.09 W/m-K). Determine the overall heat transfer
coefficient if the surrounding air temperature is 21.1 C.

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STEAM FLOW IN AN INSULATE PIPE AT ATEMPERATURE 130 C. THE INSIDE HEAT TRANSFER COEFFICIENT IS 79 W/M-K AND THE OUTSIDE COEFFICIENT IS 15 W/M-K. THE PIPE IS MILD STEEEL (K=57 WLM-K) AND HAS AN INSIDE RADIUS OF 50 MM AND AN OUTSIDE RADIUS 57 MM. THE PIPE IS COVERD WITH A 25.4 MM LAYER ( K=0.09 W/M-K). DETERMINE THE OVERALL HEAT TRANSFER COEFFICIENTIF THE SURROUNDING AIR TEMPERATURE IS 21.1 C.
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