Adiabatic and Separated Flow of R-22 and R-407C in Capillary Tube


In this paper adiabatic flow in capillary tube is analyzed and modeled for R-22 andalternative R-407C. The equations of continuity, energy and pressure drop through acapillary tube are presented. A mathematical model of sub–cooled flow region andtwo–phase flow region is developed. The results of the calculation compared withexperimental data presented in the technical literature will be shown in the presentarticle in order to validate the model developed. This numerical model is capable ofproviding an effective means to analyze capillary tube performance to optimize andcontrol an R – 22 and R – 407C in an air – conditioning systems.