Question:
A horizontal steel pipe having a diameter of {eq}5 rm cm{/eq} is maintained at a temperature of {eq}50 ^circ rm C{/eq} in a large room where the air and wall temperatures are {eq}20 ^circ rm C{/eq}. The surface emissivity of the pipe is {eq}0.8{/eq}.
(a) Estimate a value for the convective coefficient, {eq}h{/eq}, with the basis of your estimate
(b) Show a diagram with the energy fluxes on the pipe.
(c) Estimate the heat loss of the pipe per unit length.
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