Abstract: The study on multipass heat exchanger networks (HENs) synthesis is summarized. The methods of multipass heat exchangers and multipass HENs synthesis are discussed，which are mostly derived from the correction factor for log mean temperature difference (LMTD) as constrains. The analyzing and solving multipass HENs can be conducted from the perspective of thermodynamic principles. The method of multipass HENs synthesis based on pinch technology is proposed.

Key words: multipass heat exchanger networks, pinch, synthesis, minimum temperature difference, correction factor for log mean temperature difference

摘要： 回顾了近年来多程换热网络综合的研究进展，阐述了多程换热器及多程换热网络的研究方法：通过引入对数平均温差校正系数修正多程换热器的平均换热温差，进而将其作为约束条件进行多程换热网络的综合。指出可以从热力学原理出发分析求解多程换热网络，并提出从机理出发基于夹点技术进行多程换热网络综合的研究思路。

关键词: 多程换热网络, 夹点, 综合, 最小温差, 对数平均温差, 多程换热网络, 夹点, 综合, 最小温差, 对数平均温差校正系数