Fouling factor for a heat exchanger is given by (where, U 1 = heat transfer co-efficient of dirty surface U 2 = heat transfer co-efficient of clean surface) Options: A . &nbsp`U_1 - U_2` B . &nbsp`1/U_1 - 1/U_2` C . &nbsp`1/U_2 - 1/U_1` D . &nbsp`U_2 - U_1`

Fouling factor for a h

Question

Fouling factor for a heat exchanger is given by (where, U₁ = heat transfer co-efficient of dirty surface U₂ = heat transfer co-efficient of clean surface)

Options:

A . `U_1 - U_2`

B . `1/U_1 - 1/U_2`

C . `1/U_2 - 1/U_1`

D . `U_2 - U_1`

Answer: Option B

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