采用节点非结构模型（NNM）优化换热网络时，节点位置的合理配置对网络拓扑结构和优化结果有重要影响。在分析NNM的优化性能时发现，优化结果中分流结构主要出现在具有较大换热潜能的流股上。因此，提出了分流结构匹配策略，该策略可根据各流股的换热潜能对流股分流结构进行调整，使换热潜能较大的流股保留更多的分流结构，促进潜在优势结构的生成。将该策略改进后的算法用于优化9SP和15SP算例，所获优化结果比公开文献最优年综合费用低17 046 $/a和4 418 $/a，且改进后的模型与算例的适配度较高。

When using nodesbased nonstructural model(NNM)to optimize the heat exchanger network,the reasonable configuration of the nodes′ positions in the network has a guiding effect on network topological structure and optimization results.When analyzing the optimization performance of the NNM,it is found that the splitting structures mainly appear on the processing streams which have larger heat exchange potential.Therefore,the splitting structure matching strategy is proposed for retrofitting the NNM.This strategy can adjust the splitting structures according to each processing stream′s heat exchange potential,resulting in retaining more splitting structures for some processing streams which having larger heat exchange potential,so as to promote the generation of potential optimization structure.Applying the improved algorithm of proposed strategy to optimize 9SP and 15SP,the obtained results are respectively 17 046 $/a and 4 418 $/a lower than the best annual comprehensive costs in open literatures.Moreover,the improved model fits well with the calculation example.

TK124

国家自然科学基金（21978171，51976126）