7.10 Using Plank's equation, determine the freezing time for a potato sphere with a moisture content of 88%. The potato will be frozen in a blast freezer where air is available at -40°C and the convective heat transfer coefficient is 40 W/(m2 °C). The thermal conductivity of frozen potato is estimated to be 1.3 W/(m °C) and its density is 950 kg/m. The initial freezing temperature of potato is -2°C. The diameter of the potato sphere is 2 cm.
7.10 Using Plank's equation, determine the freezing time for a potato sphere with a moisture content of 88%. The potato will be frozen in a blast freezer where air is available at -40°C and the convective heat transfer coefficient is 40 W/(m2 °C). The thermal conductivity of frozen potato is estimated to be 1.3 W/(m °C) and its density is 950 kg/m. The initial freezing temperature of potato is -2°C. The diameter of the potato sphere is 2 cm.
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Transcribed Image Text:7.10 Using Plank's equation, determine the freezing time for a
potato sphere with a moisture content of 88%. The potato
will be frozen in a blast freezer where air is available
at -40°C and the convective heat transfer coefficient is
40 W/(m² °C). The thermal conductivity of frozen potato is
estimated to be 1.3 W/(m °C) and its density is 950 kg/m'
The initial freezing temperature of potato is -2°C. The
diameter of the potato sphere is 2 cm.
IS
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