Optimal synthesis of multi-plant heat exchanger networks considering both direct and indirect methods  

作　　者：Chenglin Chang YufeiWang Xiao Feng 

机构地区：[1]State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China [2]School of Chemical Engineering,Xi'an Jiaotong University,Xi'an 710049,China

出　　处：《Chinese Journal of Chemical Engineering》2020年第2期456-465,共10页中国化学工程学报（英文版）

基　　金：Financial supports from the National Natural Science Foundation of China(No.21476256);Science Foundation of China University of Petroleum;Beijing(Nos.2462017BJB03&2462018BJC004)are gratefully acknowledged.

摘　　要：Heat exchanger networks(HENs)in separated plants can be simultaneously synthesized through process streams directly or intermediate fluids indirectly.However,the direct and indirect methods are studied separately in most existing researches.As the result,conventional designs are probably suboptimal,because optimal solutions may call for hybrid approach wherein direct and indirect integration methods are used synchronously.To circumvent this drawback aforementioned,we propose in this research a novel methodology to synthesize multi-plant HENs considering both direct and indirect approaches.The methodology employs a novel superstructure covering most potential topologies for both interplant and intra-plant heat integration.We also take into account multiple kinds of intermediate fluids for indirect integration and this has not been fully addressed in previous research.A mixed-integer nonlinear programming(MINLP)is formulated to optimize multi-plant HENs involving indirect and direct methods.One example from existing literature and one industrial problem are solved to demonstrate the methodology’s capability.

关 键 词：HENS Multi-plant Heat integration SUPERSTRUCTURE MINLP 

分 类 号：TQ051.5[化学工程]