The t 4-mm-thick glass windows of an automobile have a surface area of A = 2.6...

 

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The t 4-mm-thick glass windows of an automobile have a surface area of A = 2.6 m. The outside temper- ature is T = 32°C while the passenger compartment is maintained at T= 22°C. The convection heat transfer coefficient on the exterior window surface is h, = 90 W/m. K. Determine the heat gain through the %3D windows when the interior convection heat transfer coefficient is h, = 15 W/m2 K. By controlling the air- flow in the passenger compartment the interior heat transfer coefficient can be reduced to h, = 5 W/m2-K without sacrificing passenger comfort. Determine the heat gain through the window for the reduced inside heat transfer coefficient. The t 4-mm-thick glass windows of an automobile have a surface area of A = 2.6 m. The outside temper- ature is T = 32°C while the passenger compartment is maintained at T= 22°C. The convection heat transfer coefficient on the exterior window surface is h, = 90 W/m. K. Determine the heat gain through the %3D windows when the interior convection heat transfer coefficient is h, = 15 W/m2 K. By controlling the air- flow in the passenger compartment the interior heat transfer coefficient can be reduced to h, = 5 W/m2-K without sacrificing passenger comfort. Determine the heat gain through the window for the reduced inside heat transfer coefficient.