Synthesis and design of chilled water networks using mathematical optimization

Jui-Yuan Lee, Cheng-Liang Chen, Tong-Lin Wen, Denny Kok Sum Ng, Dominic Chwan Yee Foo, Tzu Chi Wang

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


This paper presents a mathematical optimization approach for the synthesis and design of chilled water networks. In this work, the main focus is given to efficient use of chilled water, with opportunities for reuse/recycle explored in order to lower the overall chilled water flow rate supplied to the network. Based on a superstructure that includes all possible network connections, mathematical models are developed for different integration schemes. Other than minimizing the chilled water requirement, a conflicting objective is included in the model to reduce network complexity and to improve flexibility. The design problems are formulated as mixed-integer nonlinear programming models. Two industrial case studies are used to illustrate the proposed approach.

Original languageEnglish
Pages (from-to)638-649
Number of pages12
JournalApplied Thermal Engineering
Issue number1-2
Publication statusPublished - Sept 2013


  • Chilled water network
  • Mixed-integer nonlinear program (MINLP)
  • Process integration
  • Resource conservation
  • Superstructure modeling

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

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