8. A large block of concrete with a thickness of 50 cm is exposed to thermal ra- diation resulting in the surface temperature to be maintained at 100 C. If the op- posing surface is kept at 50 C, find a) the rate of heat transfer at steady state condi- tion per unit surface area and b) temperature at a distance 30 cm from the hot surface. Assume the concrete thermal conductivity remains constant throughout the block at 1.4 W/m-K. [Ans.: a) 140 W/m² and b) 70 CJ.
8. A large block of concrete with a thickness of 50 cm is exposed to thermal ra- diation resulting in the surface temperature to be maintained at 100 C. If the op- posing surface is kept at 50 C, find a) the rate of heat transfer at steady state condi- tion per unit surface area and b) temperature at a distance 30 cm from the hot surface. Assume the concrete thermal conductivity remains constant throughout the block at 1.4 W/m-K. [Ans.: a) 140 W/m² and b) 70 CJ.
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.
Chapter1: Basic Modes Of Heat Transfer
Section: Chapter Questions
Problem 1.50P: A steam pipe 200 mm in diameter passes through a large basement room. The temperature of the pipe...
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REFERENCE: FROM BOOK - ENGINEERING THERMOFLUIDS, M. MASSOUD
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