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Study on Multi-stream Heat Exchanger Network Synthesis with Parallel Genetic/Simulated
Annealing Algorithm

WEI Guanfenga; YAO Pingjinga; LUO xingb; ROETZEL Wilfriedb   

  1. a Institute of Process Systems Engineering, Dalian University of Technology, Dalian 116012,
    China
    b Institute of Thermodynamics, University of the Federal Armed Forces Hamburg, D-22039
    Hamburg, Germany
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-02-28 Published:2004-02-28
  • Contact: WEI Guanfeng

用伪并行遗传/模拟退火算法进行多流股换热器网络综合的研究

魏关锋a; 姚平经a; X.Luob; W.Roetzelb   

  1. a Institute of Process Systems Engineering, Dalian University of Technology, Dalian 116012,
    China
    b Institute of Thermodynamics, University of the Federal Armed Forces Hamburg, D-22039
    Hamburg, Germany
  • 通讯作者: 魏关锋

Abstract: The multi-stream heat exchanger network synthesis (HENS) problem can be formulated as a
mixed integer nonlinear programming model according to Yee et al. Its nonconvexity nature
leads to existence of more than one optimum and computational difficulty for traditional
algorithms to find the global optimum. Compared with deterministic algorithms, evolutionary
computation provides a promising approach to tackle this problem. In this paper, a
mathematical model of multi-stream heat exchangers network synthesis problem is setup.
Different from the assumption of isothermal mixing of stream splits and thus linearity
constraints of Yee et al., non-isothermal mixing is supported. As a consequence, nonlinear
constraints are resulted and nonconvexity of the objective function is added.To solve the
mathematical model, an algorithm named GA/SA (parallel genetic/simulated annealing
algorithm) is detailed for application to the multi-stream heat exchanger network synthesis
problem. The performance of the proposed approach is demonstrated with three examples and
the obtained solutions indicate the presented approach is effective for multi-stream HENS.

Key words: multi-stream heat exchanger network synthesis, non-isothermal mixing, mixed integer nonlinear pro-gramming model, genetic algorithm, simulated annealing algorithm, hybrid algorithm

摘要: The multi-stream heat exchanger network synthesis (HENS) problem can be formulated as a
mixed integer nonlinear programming model according to Yee et al. Its nonconvexity nature
leads to existence of more than one optimum and computational difficulty for traditional
algorithms to find the global optimum. Compared with deterministic algorithms, evolutionary
computation provides a promising approach to tackle this problem. In this paper, a
mathematical model of multi-stream heat exchangers network synthesis problem is setup.
Different from the assumption of isothermal mixing of stream splits and thus linearity
constraints of Yee et al., non-isothermal mixing is supported. As a consequence, nonlinear
constraints are resulted and nonconvexity of the objective function is added.To solve the
mathematical model, an algorithm named GA/SA (parallel genetic/simulated annealing
algorithm) is detailed for application to the multi-stream heat exchanger network synthesis
problem. The performance of the proposed approach is demonstrated with three examples and
the obtained solutions indicate the presented approach is effective for multi-stream HENS.

关键词: multi-stream heat exchanger network synthesis;non-isothermal mixing;mixed integer nonlinear pro-gramming model;genetic algorithm;simulated annealing algorithm;hybrid algorithm