A Fouling Factor is a predetermined number that represents the theoretical resistance to heat flow due to a build-up of a layer of dirt or other fouling substance on the heat exchanger. The Fouling Factor is added to the other thermal resistances that is used in the design of heat exchangers, normally specified by the client based on their experience of running the plant or process or supplied by Tubular Exchanger Manufacturers Association (TEMA). Increased thermal resistance caused by the deposit can normally only be obtained from tests or experience.
Related Definitions in the Project: The Process Engineering; Metallurgy (Corrosion and Cracking)
