In order to design an efficient heat exchanger accurately, a better understanding is needed regarding the foulants that are deposited on the heat transfer surfaces of heat exchangers to recover energy from hot flue gases in industrial furnaces. This article briefly describes the design and fabrication of a gas-side fouling measuring device, and its testing in an industrial environment. It describes probe fabrication, instrumentation used for recording the data, field test location, tests performed, and data analysis. The conclusions of the tests performed are summarized. Although fouling deposits on the probe were minimal, the tests proved that the probe is capable of measuring fouling in a harsh industrial environment.
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