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Thermal conductivity

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A 4 m diameter sphere is embedded in insulation. The sphere contains a liquid-ice mixture maintained at 0 deg C. The ambient temperature surrounding the insulation is 25 deg C. The heat loss is 400 W. What is the temperature conductivity of the insulation?

a) Less than 0.5 W/m-deg C

b) 0.5 to 1.0 W/m-deg C

c) Greater than 2 W/m-deg C

d) none of the above

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Solution Preview

As per the data provided by you, the answer is a).

Please see the attached files.

Theoretical Back Ground
Thermal/temperature conductivity K, is the property of a material that indicates its ability to conduct heat
Q=KA (ΔT/x) 1
Where Q is the rate of heat flow (heat flow per unit time), A ...

Solution Summary

The solution determines the temperature conductivity of the insulation.