International Journal of Air-Conditioning and Refrigeration

  • 제12권4호
  • /
  • Pages.192-197
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  • 2004
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  • 2010-1325(pISSN)
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  • 2010-1333(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지

A Generalized Correlation and Rating Charts for Mass Flow Rate through Capillary Tubes with Several Alternative Refrigerants

  • Choi Jong Min (Department of Mechanical Engineering, Hanbat National University) ;
  • Jang Yong Hee (Department of Mechanical Engineering, Korea University) ;
  • Kim Yongchan (Department of Mechanical Engineering, Korea University)
  • 발행 : 2004.12.01
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초록

A capillary tube, which is a common expansion device in small sized refrig-eration and air-conditioning systems, should be redesigned properly to establish an optimum operation cycle of a refrigerating system with alternative refrigerants. Based on experimental data for R-22, R-290, and R-407C, an empirical correlation is developed to predict mass flow rate through capillary tubes. Dimensionless parameters are derived from the Buckingham Pi theorem, considering the effects of operating conditions and capillary tube geometry on mass flow rate. Approximately $97\%$ of the present data are correlated within a relative deviation of $\pm\;10\%.$ The present correlation also predicts the data obtained from open literature within $\pm\;15\%.$ In addition, rating charts of refrigerant flow rate for R-12, R-22, R-134a, R-152a, R-407C, R-410A, R-290, and R-600a are developed.

키워드

참고문헌

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