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The t 4 mmthick glass windows of an automobile have a surface area of A 26 m2 The outside temperature is

The t = 4-mm-thick glass windows of an automobile have a surface area of A = 2.6 m2. The outside temperature is T∞,o = 32°C while the passenger compartment is maintained at T∞,i = 22°C. The convection heat transfer coefficient on the exterior window surface is ho = 90 W/m2 ∙ K. Determine the heat gain through the windows when the interior convection heat transfer coefficient is hi = 15 W/m2 = K. By controlling the air- flow in the passenger compartment the interior heat transfer coefficient can be reduced to hi = 5 W/m2 ∙ K without sacrificing passenger comfort. Determine the heat gain through the window for the reduced inside heat transfer coefficient.

 

Jun 28 2020 View more View Less

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