Piston Phase-Shifted Pulse Tube Refrigeration Technology and Applications
The micro-vibration,high reliability and light weight of pulse tube refrigerators have been widely used in aerospace infrared detector cooling.As a recently developed phase shift method,piston shift technology has unique advantages in achieving higher energy conversion efficiency,lower temperature,and lower vibration.Based on the essential characteristics of the piston-type phase shifter,aerodynamic analysis is conducted for three main methods:active piston phase shifter,pneumatic piston shifter with acoustics power recovery,and active piston phase shifter with acous-tics power recovery.Different piston phase shifter methods are applied to develop 10~80 K pulse tube refrigerators,and the effects of the energy conversion efficiency improvement of pulse tube refrigerators in various forms are verified.From the perspective of the application,the subsequent research and improvement direction of the piston-type phase shifter is discussed.
pulse tube refrigeratorpiston-type phase shifteracoustics power recoverycryogenic coolingspace applications