On a New MILP Model for the Planning of Heat-Exchanger Network Cleaning. Part II:  Throughput Loss Considerations

This paper is a follow-up to a paper on the scheduling of heat-exchanger network cleaning. In the first part (Lavaja, J. H.; Bagajewicz, M. Ind. Eng. Chem. Res. 2004, 43, 3924−3938), a new mixed-integer linear model for the planning of heat-exchanger cleaning in chemical plants was presented. This m...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2005-10, Vol.44 (21), p.8046-8056
Main Authors: Lavaja, Javier H., Bagajewicz, Miguel J.
Format: Article
Language:English
Subjects:
Applications of mathematics to chemical engineering. Modeling. Simulation. Optimization
Applied sciences
Chemical engineering
Exact sciences and technology
Heat exchangers and evaporators
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Summary:This paper is a follow-up to a paper on the scheduling of heat-exchanger network cleaning. In the first part (Lavaja, J. H.; Bagajewicz, M. Ind. Eng. Chem. Res. 2004, 43, 3924−3938), a new mixed-integer linear model for the planning of heat-exchanger cleaning in chemical plants was presented. This model minimizes the net present value of the combined costs of cleaning and energy; it takes into account changes in production rates and even changes in the properties and flows of the different streams throughout time. The model is extended here to allow the consideration of throughput reduction throughout the time horizon in cases where the maximum capacity of the furnace is reached. Results show that throughput reduction may be advisable at times. Multipurpose/multiperiod operation of the network under critical conditions is also addressed.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie0503186