Heat exchanger fouling model and preventive maintenance scheduling tool

V.R., Radhakrishnan and M., Ramasamy and H., Zabiri and V., Do Thanh and N.M., Tahir and M.R., Hamdi and H., Mukhtar and N.M., Ramli (2007) Heat exchanger fouling model and preventive maintenance scheduling tool. [Citation Index Journal]

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Abstract

The crude preheat train (CPT) in a petroleum refinery consists of a set of large heat exchangers which recovers the waste heat from product streams to preheat the crude oil. In these exchangers the overall heat transfer coefficient reduces significantly during operation due to fouling. The rate of fouling is highly dependent on the properties of the crude blends being processed as well as the operating temperature and flow conditions. The objective of this paper is to develop a predictive model using statistical methods which can a priori predict the rate of the fouling and the decrease in heat transfer efficiency in a heat exchanger. A neural network based fouling model has been developed using historical plant operating data. Root mean square error (RMSE) of the predictions in tube- and shell-side outlet temperatures of 1.83% and 0.93%, respectively, with a correlation coefficient, R2, of 0.98 and correct directional change (CDC) values of more than 92% show that the model is adequately accurate. A case study illustrates the methodology by which the predictive model can be used to develop a preventive maintenance scheduling tool. © 2007 Elsevier Ltd. All rights reserved.

Item Type: Citation Index Journal
Uncontrolled Keywords: Fouling; Neural networks; Preventive maintenance; Scheduling; Waste heat; Crude preheat train; Heat exchanger fouling; Prediction models; Heat exchangers
Subjects: T Technology > TP Chemical technology
Departments / MOR / COE: Departments > Chemical Engineering
Depositing User: Haslinda Zabiri
Date Deposited: 09 Mar 2010 07:01
Last Modified: 19 Jan 2017 08:27
URI: http://scholars.utp.edu.my/id/eprint/612

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