In a solar collector 1 m wide by 4 m long, the glass cover plate at an average temperature of 29°C is spaced 40 mm from the absorber plate at an average temperature of 75°C. Estimate the convection heat loss coefficient from the absorber plate to the glass when the collector is positioned horizontally. What is the convection heat loss coefficient if the spacing reduced to 10 mm?

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.
Chapter8: Natural Convection
Section: Chapter Questions
Problem 8.10P
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In a solar collector 1 m wide by 4 m long, the glass cover plate at an average temperature of 29°C is spaced 40 mm from the absorber plate at an average temperature of 75°C. Estimate the convection heat loss coefficient from the absorber plate to the glass when the collector is positioned horizontally. What is the convection heat loss coefficient if the spacing reduced to 10 mm?

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