高性能G-M型单级脉管制冷机直流抑制和制冷特性实验研究

本文开展了高性能G-M型单级脉管制冷机直流抑制和制冷特性实验研究.考察了直流流动对制冷机性能的影响,采用并联布置的双阀逆向型进气结构对直流进行抑制,成功地解决了脉管制冷机的直流问题;此外,深入研究了不同工作模式下,回热器填料布置方式对制冷特性的影响;估算了不同温度位下制冷循环的需气量,对不同压缩机输入功下的双向进气脉管制冷性能进行了研究,采用2kW(RW2)和4kW(CP4000)压缩机驱动时分别获得了18.4K和14.7K的最低制冷温度,在30K的相应制冷量分别为11.5W和29.5W.

EXPERIMENTAL INVESTIGATION ON DC FLOW SUPPRESSION AND REFRIGERATION CHARACTERISTICS OF A HIGH-PERFORMANCE SINGLE-STAGE GM-TYPE PTC

Experimental investigation on DC flow suppression and refrigeration characteristics of a high-performance single-stage GM-type pulse tube cooler has been undertaken in this paper. The influence of DC flow induced by the introduction of double-inlet on the refrigeration performance of the cooler is experimentally examined. Two parallel-placed needle valves with opposite flow direction called as double-valved configuration, instead of conventional single-valved configuration as the double-inlet is successfully used in this experiment to reduce the DC flow. Besides, the performance of the cooler with various regenerator matrices and supply power of compressors has been extensively investigated under different operation modes. Operating under double-inlet mode, 18.4K and 14.7K minimum temperature has been reached driven by RW2 and CP4000 compressor respectively, and 11.5W and 29.5W cooling power at 30K have been obtained as well.