Question

The north wall of an electrically heated home is 20 ft long, 10 ft high, and 1 ft thick, and is made of brick whose thermal conductivity is k=0.42Btu/hftF.k=0.42 \mathrm{Btu} / \mathrm{h} \cdot \mathrm{ft} \cdot ^{\circ} \mathrm{F}. On a certain winter night, the temperatures of the inner and the outer surfaces of the wall are measured to be at about 62F62^{\circ} \mathrm{F} and 25F,25^{\circ} \mathrm{F}, respectively, for a period of 8 h. Determine (a) the rate of heat loss through the wall that night and (b) the cost of that heat loss to the home owner if the cost of electricity is $0.07/kWh.

Solution

Verified

Step 1

1 of 4

Assumptions: (1) Thermal properties of the wall are constant. (2) Heat transfer through the wall is by conduction. \textit{\textbf{Assumptions:} \\ (1) Thermal properties of the wall are constant. \\ (2) Heat transfer through the wall is by conduction. }

Create an account to view solutions

By signing up, you accept Quizlet's Terms of Service and Privacy Policy
Continue with GoogleContinue with Facebook

Create an account to view solutions

By signing up, you accept Quizlet's Terms of Service and Privacy Policy
Continue with GoogleContinue with Facebook

Recommended textbook solutions

Fundamentals of Thermal-Fluid Sciences 5th Edition by John Cimbala, Robert Turner, Yunus A. Cengel

Fundamentals of Thermal-Fluid Sciences

5th EditionJohn Cimbala, Robert Turner, Yunus A. Cengel
2,403 solutions
Fundamentals of Electric Circuits 6th Edition by Charles Alexander, Matthew Sadiku

Fundamentals of Electric Circuits

6th EditionCharles Alexander, Matthew Sadiku
2,116 solutions
Advanced Engineering Mathematics 10th Edition by Erwin Kreyszig

Advanced Engineering Mathematics

10th EditionErwin Kreyszig
4,134 solutions

Related questions