Question

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 coeffi cient is 40 W/(m 2

°C). The thermal conductivity of frozen potato is estimated to be

1.3 W/(m°C) and its density is 950 kg/m 3 . The initial freezing

temperature of potato is 2°C. The diameter of the potato sphere

is 2 cm.​

Answer 1

Answer:

40°C

Explanation: