Question

In a steel spherical reactor with a heat transmission
coefficient (10 + X) W / mK, water is boiled at 350 oC. The inner
diameter of the tank is 80 cm and the wall thickness is (5+ (X /
2)) cm. This tank is insulated with (X) cm thick concrete (k = 2.5
W / mK).

Outdoor heat transfer coefficient (10+ (X)) W / m2K, indoor heat
transfer coefficient is 500 W / m2K. Calculate both surface
temperatures of the concrete insulation material and the amount of
heat passing through the environment, since the outdoor temperature
is (X) oC

X=11

Answer #1

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