+3 votes
by kratos

The ***** grille on the back of a refrigerator has a surface temperature of 95 F with a total surface area of 10 ft2. Heat transfer to the room air at 70 F takes place with an average convective heat transfer coefficient of 3 Btu/h ft2 R. How much energy can be removed during 15 minutes of operation?

1 Answer

+1 vote
by kratos
 
Best answer

Q = hΑ ΔT; Q = .QΔt = hA ΔT Δt

Q = 3 (Btu/h ft2 R) × 10 ft2 × (95 –70) F × (15/60) h

= 187.5 Btu

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