In this work multi-stream heat exchanger network(MSHEN) synthesis approach is applied to the crude oil pre-heating network reformation of atmospheric and vacuum distillation unit of a petrochemical company.

Compared with traditional two-stream heat exchangers, multi-stream heat exchangers possess many advantages such as high efficiency, compact structure and low cost.

Application of temperature-difference uniformity optimization principle to path arrangement of multi-stream heat exchangers;

Based on the accurate mathematic control in multi-stream heat exchangers,target function was established by adjusting proportion of assistant fluids to obtain minimum energy consumption for plate-fin parallel heat exchangers,and optimization operation is searched.

Based on the accurate mathematic control in multi-stream heat exchangers,a object function is made by adjusting proportion of assistant fluids to obtain minimum energy consumption for plate-fin parallel heat exchangers,and optimization operation is studied.

), an analysis about the self organization ability of multi stream heat exchangers, transiting from one static state to another, was made in this paper.

A network method is proposed in this paper to predict the dynamic characteristics of multi stream heat exchangers, based on the dynamic characteristics of two stream heat exchanger networks.