A dynamic model of a vapor compression cycle with shut-down and start-up operations

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143 Scopus citations


This paper presents an advanced switched modeling approach for vapor compression cycle (VCC) systems used in Air Conditioning and Refrigeration. Building upon recent work (McKinley and Alleyne, 2008), a complete dynamic VCC model is presented that is able to describe the severe transient behaviors in heat exchangers (condenser/evaporator), while maintaining the moving-boundary framework, under compressor shut-down and start-up operations. The heat exchanger models retain a constant structure, but accommodate different model representations. Novel switching schemes between different representations and pseudo-state variables are introduced to accommodate the transitions of dynamic states in heat exchangers while keeping track of the vapor and liquid refrigerant zones during the stop-start transients. Two model validation studies on an experimental system show that the complete dynamic model developed in Matlab/Simulink can well predict the system dynamics in shut-down and start-up transients.

Original languageEnglish (US)
Pages (from-to)538-552
Number of pages15
JournalInternational Journal of Refrigeration
Issue number3
StatePublished - May 2010
Externally publishedYes

Bibliographical note

Funding Information:
The authors wish to thank the financial support of the sponsoring companies of the Air Conditioning and Refrigeration Center at the University of Illinois at Urbana-Champaign, and also thank Neera Jain and Tom McKinley for providing useful suggestions for the manuscript preparations.


  • Comparison
  • Compression system
  • Condenser
  • Evaporator
  • Experiment
  • Heat exchanger
  • Modelling
  • Pressure
  • Refrigeration system
  • Régulation
  • Simulation
  • Transient state


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