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) 1/U1
- 1/U2
(C) 1/U2
- 1/U1
(D) U2
- U1
transfer co-efficient of dirty surface U2 = heat transfer co-efficient of clean
surface).
(A) U1
- U2
(B) 1/U1
- 1/U2
(C) 1/U2
- 1/U1
(D) U2
- U1