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A new control approach for a direct expansion (DX) air-conditioning (A/C) system with variable speed compressor and variable speed supply fan.

Author(s) : QI Q., DENG S.

Summary

This paper presents a dynamic mathematical model for a DX A/C system which was suitable for designing multivariable control. A multi-input multi-output (MIMO) controller is designed based on the model to simultaneously control indoor air temperature and humidity by varying the speeds of both compressor and supply fan. The experiment results show that MIMO control method is capable of simultaneously controlling indoor air temperature and humidity, thus improving the thermal comfort. It is also expected that such a MIMO feedback control will have wide applications in HVAC&R systems to achieve high performance.

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Details

  • Original title: A new control approach for a direct expansion (DX) air-conditioning (A/C) system with variable speed compressor and variable speed supply fan.
  • Record ID : 2009-0290
  • Languages: English
  • Source: 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2008/07/14

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