The 1 ft thick walls of a building are made of concrete (k = 2 Btu/h·ft·F). The outside temperature and heat transfer coefficient are 50 F and 2 Btu/h·ft2·F, respectively. Find the rate of heat transfer through 1000 ft2 of the wall if the inside temperature and heat transfer coefficient are 120 F and 1 Btu/h·ft2 F, respectively. Both the inside and the outside of the wall are coated with 20 mils of paint (k = 0.1Btu/h·ft·F) where 1 mil = 1E-3 in. Compare the results with a bare wall. 21. The 1 ft thick walls of a building are made of concrete (k = 2 Btu/h-ft-F). Theoutside temperature and heat transfer coefficient are 50 F and 2 Btu/h-ft²-F, re-spectively. Find the rate of heat transfer through 1000 ft of the wall if the insidetemperature and heat transfer coefficient are 120 F and 1 Btu/h-ft F, respectively.Both the inside and the outside of the wall are coated with 20 mils of paint (k = 0.1Btu/h-ft-F) where 1 mil = 1E-3 in. Compare the results with a bare wall.

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Answered: 21. The 1 ft thick walls of a building…

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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The 1 ft thick walls of a building are made of concrete (k = 2 Btu/h·ft·F). The outside temperature and heat transfer coefficient are 50 F and 2 Btu/h·ft2·F, respectively. Find the rate of heat transfer through 1000 ft2 of the wall if the inside temperature and heat transfer coefficient are 120 F and 1 Btu/h·ft2 F, respectively. Both the inside and the outside of the wall are coated with 20 mils of paint (k = 0.1Btu/h·ft·F) where 1 mil = 1E-3 in. Compare the results with a bare wall.

21. The 1 ft thick walls of a building are made of concrete (k = 2 Btu/h-ft-F). The
outside temperature and heat transfer coefficient are 50 F and 2 Btu/h-ft²-F, re-
spectively. Find the rate of heat transfer through 1000 ft of the wall if the inside
temperature and heat transfer coefficient are 120 F and 1 Btu/h-ft F, respectively.
Both the inside and the outside of the wall are coated with 20 mils of paint (k = 0.1
Btu/h-ft-F) where 1 mil = 1E-3 in. Compare the results with a bare wall.

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