HIGH EFFICIENT COAXIAL MINIATURE PULSE TUBE CRYOCOOLER WITH SYMMETRY SPRAY NOZZLE

A kind of coaxial pulse tube refrigerator that used a symmetry spray nozzle as the resistance between the pulse tube and reservoir,instead of the orifice,adjusted valve or capillary tube was first presented and discussed in the paper.Thermodynamic analysis and experimental data demonstrated that the symmetry spray nozzle can decrease the flow resistance and entropy generation,resulting in the improvement of the refrigeration performance for the pulse tube refrigerator.