The Overall Heat Transfer Co-Efficient for a Shell and Tube

question 3

Multiple Choice

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 hd0 = 2000W/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

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