Important information about Thermal conductivity
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