Diverse pinch concept for heat exchange network synthesis: the case of different heat transfer conditions

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Abstract

In this paper a new concept, the diverse pinch concept, is proposed for total cost targeting and the synthesis of realistic initial heat exchanger networks. It is suggested that the individual film heat transfer coefficients should be taken into account at the earliest possible stage of design when the film coefficients are significantly different. In order to use stream-dependent contributions to minimum approach temperatures the streams are to be vertically shifted by a value proportional to the inverse of the individual film coefficients. The effects of this proposal should be far-reaching. Not only will it make the driving force distribution smoother but it will provide a more realistic initial network supertargeting and avoid some topological traps in the synthesis of initial heat exchanger networks.

Original languageEnglish
Pages (from-to)1623-1634
Number of pages12
JournalChemical Engineering Science
Volume46
Issue number7
DOIs
Publication statusPublished - 1991

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Ion exchange
Heat transfer
Heat exchangers
Heat transfer coefficients
Hot Temperature
Costs
Temperature

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

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abstract = "In this paper a new concept, the diverse pinch concept, is proposed for total cost targeting and the synthesis of realistic initial heat exchanger networks. It is suggested that the individual film heat transfer coefficients should be taken into account at the earliest possible stage of design when the film coefficients are significantly different. In order to use stream-dependent contributions to minimum approach temperatures the streams are to be vertically shifted by a value proportional to the inverse of the individual film coefficients. The effects of this proposal should be far-reaching. Not only will it make the driving force distribution smoother but it will provide a more realistic initial network supertargeting and avoid some topological traps in the synthesis of initial heat exchanger networks.",
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AB - In this paper a new concept, the diverse pinch concept, is proposed for total cost targeting and the synthesis of realistic initial heat exchanger networks. It is suggested that the individual film heat transfer coefficients should be taken into account at the earliest possible stage of design when the film coefficients are significantly different. In order to use stream-dependent contributions to minimum approach temperatures the streams are to be vertically shifted by a value proportional to the inverse of the individual film coefficients. The effects of this proposal should be far-reaching. Not only will it make the driving force distribution smoother but it will provide a more realistic initial network supertargeting and avoid some topological traps in the synthesis of initial heat exchanger networks.

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