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)
A. U1 - U2
B. $$\frac{1}{{{{\text{U}}_1}}} - \frac{1}{{{{\text{U}}_2}}}$$
C. $$\frac{1}{{{{\text{U}}_2}}} - \frac{1}{{{{\text{U}}_1}}}$$
D. U2 - U1
Answer: Option B
This Question Belongs to Chemical Engineering >> Heat Transfer
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