Heat Transfer - Engineering

Q1:

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

C

D U2 - U1

ANS:B -

The fouling factor (Rf​) for a heat exchanger can be calculated using the equation: 2Rf​=U1​1​−U2​1​ Where:

  • U1​ is the heat transfer coefficient of the dirty surface (affected by fouling).
  • U2​ is the heat transfer coefficient of the clean surface (unaffected by fouling).
The fouling factor represents the additional resistance to heat transfer caused by the accumulation of deposits, such as scale, corrosion, or biological growth, on the heat exchange surfaces.