Model and Design of Cogeneration System for Different Demands of Desalination Water, Heat and Power Production

• Published in: Chinese journal of chemical engineering Vol. 22; no. 3; pp. 330 - 338
• Main Author: 吴现力 胡仰栋 伍联营 李红
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2014
• Subjects: Cogeneration; cogeneration system; Cost engineering; Desalination; Design engineering; Economics; Modules; multi-stage flash desalination; non-linear programming; optimal design; Optimization; reverse osmosis desalination; thermal power plant; Thermoelectricity; 二氧化碳排放; 流程模型; 热电联产系统; 热电联供系统; 电力生产; 维护费用; 脱盐水; 设计方法; optimal design; multi-stage flash desalination; reverse osmosis desalination; thermal power plant; cogeneration system; non-linear programming
• ISSN: 1004-9541; 2210-321X
• DOI: 10.1016/S1004-9541(14)60036-7

In order to improve the energy efficiency, reduce the CO2 emission and decrease the cost, a cogenera- tion system for desalination water, heat and power production was studied in this paper. The superstructure of the cogeneration system consisted of a coal-based thermal power plant （TPP）, a multi-stage flash desalination （MSF） module and reverse osmosis desalination （RO） module. For different demands of water, heat and power production, the corresponding optimal production structure was different. After reasonable simplification, the process model ot each unit was built. The economical model, including the unit investment, and operation and maintenance cost, was presented. By solving this non-linear programming （NLP） model, whose objective is to minimize the annual cost, an optimal cogeneration system can be obtained. Compared to separate production systems, the optimal system can reduce 16.1%-21.7% of the total annual cost. showing this design method was effective.