Retrofitting heat exchanger networks based on simple pinch analysis

Bao Hong Li, Chuei Tin Chang

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

It has been well-established that the energy and capital costs of a heat exchanger network are both dependent upon the minimum allowable temperature approach ΔTmin. As a result of the rapidly growing oil prices in recent years, there appears to be an urgent need to retrofit the existing "optimal" networks so as to reduce the current utility consumption rates with smaller ΔTmin values. A simple pinch-based approach is proposed here to accomplish this task while keeping additional capital investment to a reasonable level. In particular, every cross-pinch match is removed, and its heat loads on the hot and cold streams are both divided into two according to the pinch temperatures. At either side of the pinch, the divided heat loads on each stream are combined and then matched according to a systematic procedure derived from simple pinch analysis. Two examples are provided to illustrate this procedure.

Original languageEnglish
Pages (from-to)3967-3971
Number of pages5
JournalIndustrial and Engineering Chemistry Research
Volume49
Issue number8
DOIs
Publication statusPublished - 2010 Apr 21

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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