PROBLEM 4.9KNOWN:Heat generation in a buried spherical container. FIND:(a) Outer surface temperature of the container, (b) Representative isotherms and heat low lines. fSCHEMATIC:ASSUMPTIONS:(1) Steady-state conditions, (2) Soil is a homogeneous medium with onstant properties. cPROPERTIES:Table A-3, Soil (300K): k = 0.52 W/m⋅K. ANALYSIS:(a) From an energy balance on the container, and from the first entry in
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