The walls of a refrigerator are typically constructed by
Chapter , Problem 3.7(choose chapter or problem)
The walls of a refrigerator are typically constructed by sandwiching a layer of insulation between sheet metal panels. Consider a wall made from fiberglass insulation of thermal conductivity ki 0.046 W/m K and thickness Li 50 mm and steel panels, each of thermal conductivity kp 60 W/m K and thickness Lp 3 mm. If the wall separates refrigerated air at T, i 4 C from ambient air at T,o 25 C, what is the heat gain per unit surface area? Coefficients associated with natural convection at the inner and outer surfaces may be approximated as hi ho 5 W/m2 K
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