Environmental Adaptability of Dual Temperature Zones Pulse Tube Refrigerator With Active Piston Phase Shifter
In order to meet the cooling requirements of dual temperature zones,a single compressor is used to drive 80 K and 40 K dual temperature zone cold fingers.Moreover,the dual cold fingers adopt the active phase shifter to adjust the phase difference distribution in the cold fingers.The refrigerator can achieve high-efficiency cooling in dual temperature zones with lightweight.This paper is based on the dual cooling temperature zones pulse tube refrigerator with active phase shifters.Numerical computational analyses and experimental verification studies were carried out from the characteristics of the acoustic power distribution into dual cold fingers,phase difference at the regenerator cold ends,and cooling capacity variations.The study results show that by actively adjusting the phase difference of the phase shifter piston when the ambient temperature changes,the refrigerator can maintain high-efficiency cooling and achieve active environment temperature adaptation.
pulse tube refrigeratoractive phase shifterenvironmental temperaturedual temper-ature zones
NETL
NSTL
万方数据
维普
