ed between them. The average values of convective heat transfer coefficients at the interior and exterior wall are 11.33 W/m2-oC and 14.53 W/m^2-oC, respect
The interior of a refrigerator has inside dimensions 60 cm x 45 cm base area and 120 cm high. The composite wall is made of 3 mm mild steel sheets (k=40.278 W/m-oC) with 6 cm of glass wool (k=0.052 W/m-oC) insulation sandwiched between them. The average values of convective heat transfer coefficients at the interior and exterior wall are 11.33 W/m2-oC and 14.53 W/m^2-oC, respectively. (a) Draw and label the schematic layout and the equivalent thermal circuit, (b) Calculate the individual resistance of this composite wall and the resistances at the surfaces. (c) For the air temperature inside the refrigerator at 6.5 oC and outside of 25 oC, determine the rate at which heat must be removed from the refrigerator.
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