A comparison between finite volume and switched moving boundary approaches for dynamic vapor compression system modeling

Herschel Pangborn, Andrew G. Alleyne, Ning Wu

Research output: Contribution to journalArticle

Abstract

Abstract Most work in dynamic heat exchanger modeling for control design can be classified as either a finite volume or a moving boundary formulation. These approaches represent fundamentally different discretization approaches and are often characterized as contrasting accuracy with simulation speed. This work challenges that characterization by validating finite volume and moving boundary heat exchanger models with experimental data from a vapor compression system in order to demonstrate that these approaches are capable of achieving similar levels of accuracy. However, there are differences. The moving boundary model is found to have faster simulation speed, while the finite volume model is more flexible for adaptation to heat exchangers of different physical configuration. The formulation of each modeling approach used in this work is described in detail and techniques to increase simulation speed and avoid numerical issues in implementation are discussed.

Original languageEnglish (US)
Article number2963
Pages (from-to)101-114
Number of pages14
JournalInternational Journal of Refrigeration
Volume53
DOIs
StatePublished - May 2015

Keywords

  • Finite volume
  • Heat exchanger model
  • Moving boundary
  • Vapor compression system

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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