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  3. s1 freezers that arent quotfrost freequot develop layers of frost...

Question: s1 freezers that arent quotfrost freequot develop layers of frost...

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S1. Freezers that arent frost free develop layers of frost that must periodically be melted and removed. One approach is to turn off the freezer, open the door and put on a fan to circulate air inside. Estimate how long it will take to melt 1-cm-thick layer of frost with this method. Assume ambient air at 20°C and a convection coefficient of h-20 W/m2 - K. The frost may be assumed to have a mass density of 700 kg/m3 and a latent heat of fusion of 334 kJ/kg.

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