The overall heat transfer co-efficient for a shell and tube heat...

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The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U₀ = 400 W/m².K. The fouling factor after one year of operation is found to be h_d0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is

A. 1200 W/m².K

B. 894 W/m².K

C. 333 W/m².K

D. 287 W/m².K

Answer: Option C

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