SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (7): 742-753.DOI: 10.1016/S1004-9541(13)60541-8

• 过程系统工程与过程安全 • 上一篇    下一篇

Strategy for Synthesis of Flexible Heat Exchanger Networks Embedded with System Reliability Analysis

依大科, 韩志忠, 王克峰, 姚平经   

  1. Institute of Process Systems Engineering, Dalian University of Technology, Dalian 116024, China
  • 收稿日期:2012-07-20 修回日期:2012-11-29 出版日期:2013-07-28 发布日期:2013-08-24
  • 通讯作者: YAO Pingjing

Strategy for Synthesis of Flexible Heat Exchanger Networks Embedded with System Reliability Analysis

YI Dake, HAN Zhizhong, WANG Kefeng, YAO Pingjing   

  1. Institute of Process Systems Engineering, Dalian University of Technology, Dalian 116024, China
  • Received:2012-07-20 Revised:2012-11-29 Online:2013-07-28 Published:2013-08-24

摘要: System reliability can produce a strong influence on the performance of the heat exchanger network (HEN). In this paper, an optimization method with system reliability analysis for flexible HEN by genetic/simulated annealing algorithms (GA/SA) is presented. Initial flexible arrangements of HEN is received by pseudo-temperature enthalpy diagram. For determining system reliability of HEN, the connections of heat exchangers(HEXs) and independent subsystems in the HEN are analyzed by the connection sequence matrix(CSM), and the system reliability is measured by the independent subsystem including maximum number of HEXs in the HEN. As for the HEN that did not meet system reliability, HEN decoupling is applied and the independent subsystems in the HEN are changed by removing decoupling HEX, and thus the system reliability is elevated. After that, heat duty redistribution based on the relevant elements of the heat load loops and HEX areas are optimized in GA/SA. Then, the favorable network configuration, which matches both the most economical cost and system reliability criterion, is located. Moreover, particular features belonging to suitable decoupling HEX are extracted from calculations. Corresponding numerical example is presented to verify that the proposed strategy is effective to formulate optimal flexible HEN with system reliability measurement.

关键词: flexible heat exchanger network synthesis, system reliability, network decoupling, independent subsystem

Abstract: System reliability can produce a strong influence on the performance of the heat exchanger network (HEN). In this paper, an optimization method with system reliability analysis for flexible HEN by genetic/simulated annealing algorithms (GA/SA) is presented. Initial flexible arrangements of HEN is received by pseudo-temperature enthalpy diagram. For determining system reliability of HEN, the connections of heat exchangers(HEXs) and independent subsystems in the HEN are analyzed by the connection sequence matrix(CSM), and the system reliability is measured by the independent subsystem including maximum number of HEXs in the HEN. As for the HEN that did not meet system reliability, HEN decoupling is applied and the independent subsystems in the HEN are changed by removing decoupling HEX, and thus the system reliability is elevated. After that, heat duty redistribution based on the relevant elements of the heat load loops and HEX areas are optimized in GA/SA. Then, the favorable network configuration, which matches both the most economical cost and system reliability criterion, is located. Moreover, particular features belonging to suitable decoupling HEX are extracted from calculations. Corresponding numerical example is presented to verify that the proposed strategy is effective to formulate optimal flexible HEN with system reliability measurement.

Key words: flexible heat exchanger network synthesis, system reliability, network decoupling, independent subsystem