Abstract
A gas-coupled two-stage Stirling-type coaxial pulse tube cryocooler (SPTC) driven by a dual opposed-piston configuration linear compressor was designed and experimental test. Both of the two stages adopted coaxial structure for compactness. At the cold end of first stage, a part of working gas was introduced to the regenerator of second stage, while the others were returned to the pulse tube of the first stage. A lowest temperature of 7.3 K and 0.3 W/15 K cooling capacity can be achieved with 250 W PV power by simulation. At present, a lowest temperature of 8.1 K and 0.56 W/15 K cooling capacity can be achieved with 600 W the input power. The influence of the frequency, amplitude of the positon and the hot end temperature were studied. This paper presents the simulation results and primary test results of the designed cryocoolers.
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