Fouling factor for a heat exchanger is given by (where, U₁ = heat transfer co-

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 . U₁ - U₂

B . 1/U₁ - 1/U₂

C . 1/U₂ - 1/U₁

D . U₂ - U₁

Answer: Option B

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