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

Author(s) : LI B., ALLEYNE A. G.

Type of article: Article, IJR article

Summary

This paper presents an advanced switched modelling approach for vapour compression cycle (VCC) systems used in air conditioning and refrigeration. Building upon recent work, a complete dynamic VCC model is presented that is able to describe the severe transient behaviours 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 vapour 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.

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Pages: pp. 538-552

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Details

  • Original title: A dynamic model of a vapour compression cycle with shut-down and start-up operations.
  • Record ID : 2010-0070
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 33 - n. 3
  • Publication date: 2010/05

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