Two thick walls are separated by a vacuum gap of thickness L. A cylinder of diameter D runs between the walls. All surfaces are highly polished (their emissivity is small). The walls are at temperatures Tb1 and T2 at locations far from the cylinder. Draw the thermal resistance network and then derive an expression for the shape factor, S, associated with conduction between Tb1 and Th.2. Use this expression to determine the value of the shape factor for D = 0.01 m, L= 0.5 m, and k = 23 W/m-K.

Two thick walls are separated by a vacuum gap of thickness L. A cylinder of diameter D runs between the walls. All surfaces are highly polished (their emissivity is small). The walls are at temperatures Tb1 and T2 at locations far from the cylinder. Draw the thermal resistance network and then derive an expression for the shape factor, S, associated with conduction between Tb1 and Th.2. Use this expression to determine the value of the shape factor for D = 0.01 m, L= 0.5 m, and k = 23 W/m-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.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.10P: 1.10 A heat flux meter at the outer (cold) wall of a concrete building indicates that the heat loss...

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