# Freezing of an Ice Cream

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 February 28, 2012, 08:15 Freezing of an Ice Cream #1 New Member   KEYUR PATEL Join Date: Feb 2012 Posts: 5 Rep Power: 6 Dear all, I am Working On an interesting M. Tech Project. Description is discussed bellow. 1 litter rectangular Ice cream packet is placed in air blast freezer. Air is flowing at the velocity of 2.5 m/s. from one side of rectangular duct and leave at the other end of the freezer. It flows over the Rectangular ice cream box. The Temperature of an air is (-30 C) Initial Temperature of an ice cream is (-4 C) initial freezing temperature is (-5.6 C) specific heat above freezing point is 3.22 kJ/Kg K and bellow freezing Point is 2.74Kj/kg K latent heat of fusion is 204 kj/kg density 550 kg/cubic meter conductivity of unfrozen ice cream is 0.518 w/m K and frozen ice cream is 1.8203 w/m k I have to find that what time will it take to reach the center temperature of an ice cream to (-18 C) Air properties are available. heat transfer coefficient h=15 w/m2*K conductivity of an ice cream box which is made up of paper can be taken as 0.05 w/m k. Thickness of wraper is 0.5 mm. If any one has related tutorial of freezing then please send it to me or upload on the forum. I wanted to plot graph of Temperature vs time as an Output. Please Help me.

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