8 A copper hot-water cylinder of length 1-0 m and radius 0-20 m is lagged by 20m of material of thermal conductivity 0-40 W m K. Estimate the temperature df the outer surface of the lagging, assuming heat loss is through the sides only, if hear has to be supplied at a rate of 0-25 kW to maintain the water at a steady temperature of 60°C.

8 A copper hot-water cylinder of length 1-0 m and radius 0-20 m is lagged by 20m of material of thermal conductivity 0-40 W m K. Estimate the temperature df the outer surface of the lagging, assuming heat loss is through the sides only, if hear has to be supplied at a rate of 0-25 kW to maintain the water at a steady temperature of 60°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.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.16P

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