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Mass flow characteristics and empirical modelling of R-22 and R-410A flowing through electronic expansion valves.

Author(s) : PARK C., CHO H., LEE Y., et al.

Type of article: Article, IJR article

Summary

The applications of electronic expansion valves (EEVs) into multi-type heat pumps and inverter heat pumps in building air-conditioning systems have increased for comfort environmental control and energy conservation. However, test data and mass flow models of EEVs are very limited in open literature. The objectives of this study are to investigate the mass flow characteristics of R-22 and R-410A through EEVs and to develop an empirical correlation for the prediction of mass flow rates of R-22 and R-410A through EEVs. Mass flow rates through six EEVs were measured by varying the EEV opening, inlet and outlet pressures, and the subcooling. Mass flow rates of R-410A were compared with those of R-22 at the same test conditions. Based on the experimental data, an empirical correlation for mass flow predictions in EEVs was developed by modifying the orifice equation. The predictions of the present correlation showed good agreement with the measured data with average and standard deviations of 0.76 and 5.9%, respectively. Approximately 92% of the measured data were within plus or minus 10% of the predictions.

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Pages: 1401-1407

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Details

  • Original title: Mass flow characteristics and empirical modelling of R-22 and R-410A flowing through electronic expansion valves.
  • Record ID : 2008-0151
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 30 - n. 8
  • Publication date: 2007/12

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