A plaster wall which is 20 cm thick with a thermal conductivity of 0.3W/m2 C is used in a certain house. The inner wall temperature is at 40C, and the outer wall is exposed to ambient wind and the surroundings at 12C. The film coefficient, h, for convective heat transfer in a 10m/s wind is about 21W/m2C. Ignoring any radiation losses, find the overall coefficient for the conduction and convection losses in W/m2C O a. 1 O b. 10.1 O c. 1.4 O d.8.1

A plaster wall which is 20 cm thick with a thermal conductivity of 0.3W/m2 C is used in a certain house. The inner wall temperature is at 40C, and the outer wall is exposed to ambient wind and the surroundings at 12C. The film coefficient, h, for convective heat transfer in a 10m/s wind is about 21W/m2C. Ignoring any radiation losses, find the overall coefficient for the conduction and convection losses in W/m2C O a. 1 O b. 10.1 O c. 1.4 O d.8.1

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 1.67P: 1.67 In beauty salons and in homes, a ubiquitous device is the hairdryer. The front end of a typical...

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