NOVEL APROACH FOR MINLP OPTIMAL SYNTHESIS OF HEAT INTEGRATION COMBINED WITH TOTAL SITE PINCH ANALYSIS

YIN Hongchao; LI Zhenmin; YUAN Yi

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NOVEL APROACH FOR MINLP OPTIMAL SYNTHESIS OF HEAT INTEGRATION COMBINED WITH TOTAL SITE PINCH ANALYSIS

更新时间：2025-12-10

- NOVEL APROACH FOR MINLP OPTIMAL SYNTHESIS OF HEAT INTEGRATION COMBINED WITH TOTAL SITE PINCH ANALYSIS
- CIESC Journal Issue 2, (2002)
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- Online First：25 February 2002，
  
  Published：25 February 2002
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YIN Hongchao, LI Zhenmin, YUAN Yi. NOVEL APROACH FOR MINLP OPTIMAL SYNTHESIS OF HEAT INTEGRATION COMBINED WITH TOTAL SITE PINCH ANALYSIS[J]. CIESC Journal, 2002, (2).
DOI：

YIN Hongchao, LI Zhenmin, YUAN Yi. NOVEL APROACH FOR MINLP OPTIMAL SYNTHESIS OF HEAT INTEGRATION COMBINED WITH TOTAL SITE PINCH ANALYSIS[J]. CIESC Journal, 2002, (2). DOI：

摘要

提出了过程全局夹点分析与超结构混合整数非线性规划 (MINLP)相结合的能量集成最优综合法 .各单过程内部换热优化匹配后

进行各过程剩余冷、热负荷与公用工程系统的全局夹点分析

确定全局热集成目标

在此基础上建立包含过程剩余热负荷产生各等级蒸汽、剩余冷负荷使用各等级蒸汽加热的各种可能匹配方案的公用工程换热网络超结构及其MINLP模型

采用混合连续进化算法求解得到过程与公用工程换热网络最优改造方案 .大型乙烯装置能量集成应用算例表明

可充分发挥全局夹点分析法确定改造目标的简洁实用性和超结构MINLP寻求最佳方案的优点

Abstract

This paper presents a new approach of superstructure mathematical programming combined with total site pinch analysis for utilities and multi-processes optimal synthesis.For the heat integration retrofit

the total site pinch analysis can give the targets of utilities usage and heat recovery

but cannot offer practical designs of optimal network.Based on the total site pinch analysis

a superstructure of utilities heat exchanger network retrofitting can be built which involves only the feasible and better retrofit options.Then an improved Mixed Integer Nonlinear Programming(MINLP)model for the network superstructure is proposed which contains non- convex non-linear objective and constraints.It can be solved with the improved mixed continuous evolutionary algorithm.The presentation has advantages of making use of the results of total site pinch analysis

reducing the scale of superstructure

and having the capability of reaching global optimum.A numerical example of energy integration retrofit in a 300000 t·a -1 ethylene plant illustrates that the combined method can reach the total site pinch analysis targets(of minimum utilities usage and maximum steam generation)and can reach global optimum of utilities heat exchanger network.

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