Consider two tubes of the same diameter (D1 = 20 cm), length, and surface temperature (Ti). One tube is properly centered in a cylindrical insulation of D2 = 40 cm: the other tube is placed in eccentric with the same diameter cylindrical insulation, where the distance between the center of the tube and the center of the insulation is z = 5 mm. If both configurations have the same outer surface temperature 72, determine which configuration has the higher rate of heat transfer through the insulation.

Figure P3-151:

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