Ice forms on a duct trasporting liquid nitrogen. The duct consists of a circular

Question

Ice forms on a duct trasporting liquid nitrogen. The duct consists of a circular hole, with diameter D=0.5 m, surrounded by square insulation, width=0.95 m, and thermal conductivity k=0.223 W/m*K. The inside of the duct is maintained at the boiling temperature of liquid nitrogen (T=-196 C). The outside ice experiences convection with T=20 C, and an effective h=5 W/m2*K. Calculate the thickness of the ice and the total heat per length that the liquid nitrogen absorbs from the surroundings. Hint: Assume that the ice is thin enough that conduction through it (and only through the ice) is effectiviely 1-D and that the parameter of the ice is approximately the same as the duct (.95x.95m).

Explanation / Answer

Yeah this is crap, go home chegg.

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