A vertical cavity wall of a house has 2.7 m height and 10 m width. The cavity space in the wall has length of 30 cm and involves quiescent air. During a winter day surface of the cavity towards indoors is 15 °C, whereas other surface towards outdoors is 5 °C. a. Calculate the natural convection heat transfer rate across the cavity? b. If the emissivity of the cavity surfaces is 0.7 what is the total heat transfer rate across the cavity? T₁-15 °C Indoors Cavity Quiescent air L= 30 cm | T₂= 5 °C H= 2.7 m Width of the wall is 10 m Outdoors
A vertical cavity wall of a house has 2.7 m height and 10 m width. The cavity space in the wall has length of 30 cm and involves quiescent air. During a winter day surface of the cavity towards indoors is 15 °C, whereas other surface towards outdoors is 5 °C. a. Calculate the natural convection heat transfer rate across the cavity? b. If the emissivity of the cavity surfaces is 0.7 what is the total heat transfer rate across the cavity? T₁-15 °C Indoors Cavity Quiescent air L= 30 cm | T₂= 5 °C H= 2.7 m Width of the wall is 10 m Outdoors
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 8.13P
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