Consider a sealed 20-cm-high electronic box which has a base dimensions 50 cm x 50 cm placed in a vacuum chamber. The em

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Consider A Sealed 20 Cm High Electronic Box Which Has A Base Dimensions 50 Cm X 50 Cm Placed In A Vacuum Chamber The Em 1 (61.16 KiB) Viewed 40 times

Consider a sealed 20-cm-high electronic box which has a base dimensions 50 cm x 50 cm placed in a vacuum chamber. The emissivity of the outer surface of the box is 0.95. If the electronic components in the box dissipating a total of 120 W of power and the outer surface temperature of the box is not to exceed 55°C as in Figure Qlc, determine the temperature at which the surrounding surfaces must be kept if this box is to be cooled by radiation alone. Assume the heat transfer from the bottom surface of the box to the stand to be negligible. (3 Marks) 50 cm 50 cm 120 W E = 0.95 T = 55°C S Electronic box 20 cm Stand Figure Qlc