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Models for the Prediction of Fouling in Crude Oil Pre-Heat Trains
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Fouling has two significant effects upon pre-heat train performance. Firstly, any of layer of foulant on the heat transfer surface presents a resistance to heat transfer. This thermal resistance increases as the layer builds up, so fouling reduces the amount of heat that can be recovered and increases the amount of fuel required in the fired heater at the end of the train. Secondly, the presence of the fouling layer, particularly inside tubes, results in an increase in the resistance presented to flow. and the pressure drop across a unit. Extended fouling can affect the throughput of the train. The impetus behind exchanger cleaning is often the need to maintain throughput rather than save energy. If we are to be able to consider fouling in the design of crude oil pre-heat trains, we need to be able to predict three things: •the conditions at which fouling starts •the rate at which the thermal resistance increases •the effect of fouling on pressure drop
SubjectPre-Heat Train Fouling Model
Yeap, B. L.; Wilson, D. I.; Polley, G. T. (2002). Models for the Prediction of Fouling in Crude Oil Pre-Heat Trains. Energy Systems Laboratory (http://esl.tamu.edu). Available electronically from