Browse > Article

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)
Publication Information
International Journal of Air-Conditioning and Refrigeration / v.12, no.4, 2004 , pp. 192-197 More about this Journal
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.
Capillary tube; Mass flow rate; Correlation; Rating chart; Expansion device;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Dirik, E., Inan, C. and Tanes, M. Y., 1994, Numerical and experimental studies on adiabatic and non-adiabatic capillary tubes with HFC-I34a, Proceedings, IIR-Purdue Refrigeration Conference, West Lafayette, U.S.A
2 Wolf, D. A., Bittle, R. R. and Pate, M. B., 1995, Adiabatic capillary tube performance with alternative refrigerants, ASHRAE Final Report No. RP-762
3 Bansal, P. K. and Rupasinghe, A.S., 1996, An empirical correlation for sizing capillary tubes, International Journal of Refrigeration, Vol.19, No.8, pp.497-505
4 Lathrop, H. F., 1948, Application and characteristics of capillary tubes, Refrigerating Engineering, Vol. 56, No.2, pp.I-33
5 Melo, C., Ferreira, R. T. S., Neto, C. B., Goncalves, J. M. and Mezavila, M. M., 1999, An experimental analysis of adiabatic capillary tubes, Applied Thermal Eng., Vol.19, pp.669-694
6 Chen, Z. H., Li, R. Y, Lin, S. and Chen, Z. Y., 1990, A correlation for metastable flow of refrigerant 12 through capillary tubes, ASHRAE Trans., Vol.96, No.1, pp.550-554
7 Kuehl, S. J. and Goldschmidt, V. W., 1991, Modeling of steady flow of R-22 through capillary tubes, ASHRAE Trans., Vol.97, No.1, pp. 139-148
8 Park, T. J., Lee, M. K., Jeong, J. H. and Chang, K. S., 2003, Comparison of performance variation between R-22 and R-41OA refrigeration systems, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol.15, No.3, pp.166-176
9 Buckingham, E., 1914, On physically similar systems: Illustrations of the use of dimensional equations, Physical Review, Vol.4, No.4, pp.345-376