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Engineering, 26.07.2019 20:20 rubieceleste548

Ahollow sphere is constructed of pure aluminum with an inner diameter of 4 cm and an outer diameter of 8 cm. the sphere is covered with a 1-cm layer of insulating material having k = 50 w/m · k and the outside of the insulation exposed to h = 20 w/m2.k and t = 10c. the inside temperature of the sphere is maintained at 100c. (a) sketch the thermal resistance network and (b) determine the heat loss to the ambient.

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