Arid
MINLP model for optimal biocide dosing and maintenance scheduling of seawater cooled plants
Napoles-Rivera, Fabricio1; Bin Mahfouz, Abdullah2; Jimenez-Gutierrez, Arturo1; El-Halwagi, Mahmoud M.2; Maria Ponce-Ortega, Jose3
通讯作者Napoles-Rivera, Fabricio
会议名称22nd European Symposium on Computer Aided Process Engineering (ESCAPE)
会议日期JUN 17-20, 2012
会议地点London, ENGLAND
英文摘要

Nowadays many countries in arid regions around the world suffer from severe water shortages; this situation is steadily becoming a global concern as water resources are being depleted. In this regard, strategies that a few decades ago were not feasible are becoming interesting alternatives; one of them is the use of seawater as cooling fluid in chemical plants. This alternative, however, presents problems in the plant operation, including a rapid biofilm growth (biofouling) that reduces the heat transfer efficiency. To control the biofouling, the use of biocides (usually chlorine) and periodical mechanical maintenances are implemented. In this work a mathematical programming model is presented for the optimal planning of biocide dosing and mechanical maintenance scheduling. The model considers the biocide kinetics along the network, its dependence with temperature and its interaction with the biofilm thickness. The model uses disjunctive programming to select the optimal maintenance scenario, allowing for different levels of biofilm thickness that depend on the plant schedule. The model also includes environmental constraints to prevent the discharge of streams with potentially dangerous loads of chemicals. These constraints include a limit for the concentration of biocide and the end of pipe chemical treatment. The objective function is to minimize the total annual cost, including the cost for the biocide, chemicals used for end of pipe treatment and maintenance. To show the model applicability, a case study for an integrated power/desalination plant cooled with seawater is solved. Several scenarios were tested including daily, biweekly, monthly and bimonthly biocide and end of pipe treatment chemical dosing, and mechanical maintenances from one to up to six times per year. The results indicate that recurrent dosing policies, either biweekly or monthly for operational simplicity, along with a maximum of three treatments per year provide an optimal scenario.


英文关键词Biocide dosing maintenance scheduling seawater cooled plants optimization MINLP
来源出版物22 EUROPEAN SYMPOSIUM ON COMPUTER AIDED PROCESS ENGINEERING
ISSN1570-7946
出版年2012
卷号30
页码872-876
EISBN978-0-444-59431-0
出版者ELSEVIER SCIENCE BV
类型Proceedings Paper
语种英语
国家Mexico;USA
收录类别CPCI-S
WOS记录号WOS:000316669100175
WOS类目Computer Science, Interdisciplinary Applications ; Engineering, Chemical ; Operations Research & Management Science
WOS研究方向Computer Science ; Engineering ; Operations Research & Management Science
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/300461
作者单位1.Inst Tecnol Celaya, Celaya, Gto, Mexico;
2.Texas A& M Univ, College Stn, TX 77843 USA;
3.Univ Michoacana, Morelia 58060, Michoacan, Mexico
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Napoles-Rivera, Fabricio,Bin Mahfouz, Abdullah,Jimenez-Gutierrez, Arturo,et al. MINLP model for optimal biocide dosing and maintenance scheduling of seawater cooled plants[C]:ELSEVIER SCIENCE BV,2012:872-876.
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