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A real-time transient model for air conditioners.

Author(s) : ROSSI T., BRAUN J. E.

Summary

A transient model for air-cooled, direct expansion cooling equipment was developed that runs faster than real time and handles the thermal and refrigerant flow transients associated with on/off compressor control. The model involves the solution of a set of first-order differential equations that arise from mass and energy conservation. The state variables include refrigerant pressures and enthalpies and temperatures of solid material. A novel method for handling the start up and shut down transients was developed. The model was validated using measurements for a 3-ton (10.6 kW) rooftop air conditioner.

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Details

  • Original title: A real-time transient model for air conditioners.
  • Record ID : 2000-1518
  • Languages: English
  • Source: 20th International Congress of Refrigeration: Refrigeration into the Third Millennium.
  • Publication date: 1999/09/19

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