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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Optimization of scheduled cleaning of fouled heat exchanger network under ageing using genetic algorithm
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Optimization of scheduled cleaning of fouled heat exchanger network under ageing using genetic algorithm

机译：优化安排清洁污染的热量换热器网络下使用遗传老化算法

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摘要

The problem of heat exchanger network (HEN) fouling and ageing has been a costly feature of chemical and petrochemical industries, particularly, the oil refineries. In this paper, a strategy to determine the optimal cleaning schedule of the crude oil refinery's preheat train (PHT) under fouling and different ageing scenarios (i.e., slow and fast ageing) is addressed by a specialized Genetic Algorithm (GA) which uses an array of discrete and positive integers as chromosome representation. Specifically, the effect of key cleaning decision factors (i.e., which, when and how to clean), dictated by the GA, on optimal cleaning schedules based on both thermal and economic behavior of the PHT was studied. The results highlight the efficacy of the GA and a novel chromosome application to the optimization of complex cleaning scheduling. Considerable savings are achieved by the implementation of optimum cleaning schedules for all the ageing scenarios compared with un-optimized cleaning or no cleaning performed in a case study involving a 14-unit crude oil refinery HEN. Fast ageing led to significant reduction in energy losses, and hence, improved heat recovery and fewer number of cleanings due to the higher formation rate of a more thermally conductive coke, compared with slow ageing. (C) 2016 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
机译：换热器网络的问题(鸡)污垢和老化是一个昂贵的的特点化工和石化行业,特别是,炼油厂。一个策略来确定最佳的清洗时间表的原油炼油厂的预热火车(PHT)污垢和老化场景(例如,慢速和快速老化)通过专门的遗传算法(GA)来解决它使用一组离散的和积极的吗整数作为染色体表示。具体来说,关键清洁决策的影响因素(例如,何时以及如何清洁),由遗传算法,优化清洁时间表基于热和经济行为PHT进行了研究。功效的遗传算法和一种新的染色体应用优化的复杂清洁调度。通过优化的实现清洁安排所有老化的场景相比之下,un-optimized清洗或没有在案例研究涉及清洁执行14-unit原油炼油厂母鸡。显著减少能量损失,因此,提高热回收和更少的数量清洁的形成率较高更多的导热可口可乐,相比之下减缓老化。工程师。保留。

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