Energy targeting in heat exchanger network synthesis using rigorous physical property calculations

Marcelo Castier, Eduardo M. Queiroz

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Pinch points for heat exchanger network synthesis were determined using rigorously calculated thermodynamic properties, in contrast with the usual approach of assuming constant heat capacities (cp) and linear interpolations in enthalpy for phase changing streams. We discuss a more formal approach to the energy targeting problem, showing that its solution requires the use of a global minimization method, because of the possibility of multiple local minima in the objective function. We show three applications, two of them involving near-critical streams and the other containing several streams that undergo phase transitions. In all cases, we correctly detected pinch points that otherwise would have been wrongly located by targeting procedures based on the constant cp assumption and on a single linearization between the bubble and dew points for each stream. For this reason, the procedure presented here is an adequate alternative for the accurate determination of pinch points and utility targets when the physical properties have nonlinear behavior with respect to temperature.

Original languageEnglish
Pages (from-to)1511-1515
Number of pages5
JournalIndustrial and Engineering Chemistry Research
Volume41
Issue number6
Publication statusPublished - 20 Mar 2002
Externally publishedYes

Fingerprint

Linearization
targeting
Specific heat
Heat exchangers
Enthalpy
Interpolation
Thermodynamic properties
Physical properties
physical property
Phase transitions
energy
Temperature
dew point
heat capacity
thermodynamic property
phase transition
enthalpy
interpolation
bubble
calculation

ASJC Scopus subject areas

  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

Cite this

Energy targeting in heat exchanger network synthesis using rigorous physical property calculations. / Castier, Marcelo; Queiroz, Eduardo M.

In: Industrial and Engineering Chemistry Research, Vol. 41, No. 6, 20.03.2002, p. 1511-1515.

Research output: Contribution to journalArticle

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