The energy separation performance of the vortex tube with various gases

such as air

nitrogen

argon and carbon dioxide

was studied in the experiment

whereby cold and hot characteristic curves

refrigeration output

unit refrigeration output and coefficient of performance(COP) versus cold flow rate were obtained.The results indicate that cold and hot effects are closely related to mol mass: the bigger the mol mass

the better the cold and hot performance will be;additionally

these effects are subjected to the coefficient of Joule-Thomson to some extent.Refrigeration output and COPalso have a corresponding direct correlation with mol mass

in addition to refrigeration effect and specific heat at constant pressure.