Abstract: In this paper,an improved mixed-integer nonlinear programming（MINLP）model is presented which can synthesize heat exchanger networks where utility cost,exchanger areas and selection of matches are optimized simultaneously.By the use of the stagewise superstructured transshipment model and concepts of endothermic and exothermic potentialities of the process streams,the proposed model eliminates the unreasonable assump tion on isothermal mixing for stream splits under the condition where all the constraints are linear.The optimal network can be obtained by solving only one MINLP problem.Examples are presented to illustrate that the proposed simultaneous synthesis model has more advantages than others.

摘要： 针对现有的换热器网络最优综合方法的局限性，采用分级超结构转运模型和物流吸、放热潜力的概念，提出了非等温混合线性约束的换热器网络同步最优综合混合整数非线性规划（MINLP）的改进模型．该模型不仅可以对公用工程费用、换热面积、换热设备台数及物流的匹配选择进行多目标同步优化，而且在线性约束的条件下消除了等温混合的不合理假设，只需求解一次MINLP问题就可得到包括分流情况在内的最优网络结构．算例表明，该模型优于以往的几种同步优化模型．