A spherical vessel of 0.5 m outside diameter is insulated with 0.2 m thickness of insulation of thermal conductivity 0.04 W/m degree. The surface temperature of the vessel is 195 degree Celsius and outside air is at 10 degree Celsius. Determine heat flow per m2 based on inside area

A spherical vessel of 0.5 m outside diameter is insulated with 0.2 m t

1.	A spherical vessel of 0.5 m outside diameter is insulated with 0.2 m thickness of insulation of thermal conductivity 0.04 W/m degree. The surface temperature of the vessel is 195 degree Celsius and outside air is at 10 degree Celsius. Determine heat flow per m² based on inside area
A.	63.79 W/m<sup>2</sup>
B.	73.79 W/m<sup>2</sup>
C.	83.79 W/m<sup>2</sup>
D.	93.79 W/m<sup>2</sup>
Answer» C. 83.79 W/m<sup>2</sup>