Fouling Factor Precipitation of solid deposits Corrosion and Chemicals fouling Biological fouling
The fouling factor depends on operating temperature and the velocities of fluids and length of service. Fouling increases with increasing temperature and decreasing velocities. Fouling should be considered in the design and selection of heat exchanger. In such application it may be necessary to select a larger and expensive heat exchanger. The periodic cleaning of heat exchanger and the resulting down time are additional penalties associated with fouling.