A 6-cm diameter pipe is used to deliver hot water to a residence. A 8-m-long horizontal section of the pipe will pass through a large room of ambient temperature 29°C. The flow of hot water inside the pipe will maintain the outer surface temperature of the pipe at 63°C. If the water is flowing at 0.015 kg/s with an inlet temperature of 780C. determine the outlet temperature of the water. The properties of air at the film temperature are as follows: k = 0.027 W/m.C. v = 17.5*10-6 m2/s, alpha= 25*10-6 m2/s Pr 0.704, B= 1/Tf = 0.00313 K-1. Take cp.water34.178 kj/kgK Select one: O a. 82.5 oC O b. 87 oC Oc. 69 oC d. 73.50C

A 6-cm diameter pipe is used to deliver hot water to a residence. A 8-m-long horizontal section of the pipe will pass through a large room of ambient temperature 29°C. The flow of hot water inside the pipe will maintain the outer surface temperature of the pipe at 63°C. If the water is flowing at 0.015 kg/s with an inlet temperature of 780C. determine the outlet temperature of the water. The properties of air at the film temperature are as follows: k = 0.027 W/m.C. v = 17.510-6 m2/s, alpha= 2510-6 m2/s Pr 0.704, B= 1/Tf = 0.00313 K-1. Take cp.water34.178 kj/kgK Select one: O a. 82.5 oC O b. 87 oC Oc. 69 oC d. 73.50C

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.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.19P

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