A certain building wall consists of 6-in of concrete ( k = 1.2 W/m-oC), 2-in of fiberglass insulation ( k = 0.026 W/m-0C), and 3/8-in of gypsum board ( k = 0.05 W/m-oC).The inside and outside convection coefficients are 2.0 and 7.0 BTU/hr-ft2-oF, respectively. The outside air temperature is 72 oF and the inside air temperature is 20 oF. Calculate the Rvalue, overall heat transfer coefficient and the heat loss per for 1 m2 area of the wall. (Four Decimal Places for final answer)

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Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A certain building wall consists of 6-in of concrete ( k = 1.2 W/m-oC), 2-in of fiberglass insulation ( k = 0.026 W/m-0C), and 3/8-in of gypsum board ( k = 0.05 W/m-oC).The inside and outside convection coefficients are 2.0 and 7.0 BTU/hr-ft2-oF, respectively. The outside air temperature is 72 oF and the inside air temperature is 20 oF. Calculate the Rvalue, overall heat transfer coefficient and the heat loss per for 1 m2 area of the wall. (Four Decimal Places for final answer)

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