The document summarizes an experimental investigation of a vortex tube refrigeration system based on compressed air. The vortex tube produces cold and hot air streams from a single source of compressed air without moving parts or environmental impact. Key parameters that affect vortex tube operation are classified as geometrical (dimensions) or thermo-physical (pressure, gas type). An experimental setup is designed to investigate the effect of varying the diameter and length of the main tube, outlet orifice shape and diameter, and inlet pressure, gas, cold gas ratio, and moisture. Results show temperature difference increases with inlet pressure and more nozzles. Insulation also increases temperature separation.