Investigation on the Selection of Capillary Tube for the Alternative Refrigerant R-407C

  • Kim, Chang-Nyeun (Trubo and Power Machinery Research Center Seoul National University) ;
  • Park, Young-Moo (School of Mechanical and Industrial Engineering, Ajou University)
  • Published : 2000.05.01


The capillary tube performance for R-407C is experimentally investigated. The experimental setup is a real vapor-compression refrigerating system. Mass flow rate is measured for various diameter and length while inlet pressure and degree of subcooling are changed. These data are compared with the results of a numerical model. The mass flow rate of the numerical model is about 14% less than the measured mass flow rate. It is found that mass flow rate and length for R-407C are less than those for R-22 under the same condition. Based on this experimental study and the numerical model, a set of design charts for capillary tube of R-407C is proposed.