混合填充式回热器单级脉管制冷机性能研究

回热器为回热式低温制冷机的关键部件,其性能对系统的影响甚大。为探索回热器内金属丝网混合填充对回热器性能的影响,文章基于回热器模拟软件REGEN3.3仿真结果的基础上,制作了单级脉管制冷装置,采用#300SS,#400SS和#500SS的金属丝网混填了四组回热器,并在不同输入功率下进行了系统制冷性能实验。实验结果表明,较之低目数丝网填充的回热器制冷机,采用高目数丝网填充的回热器制冷机性能较优;在回热器热端填充低目数,冷端填充高目数的丝网,可提高回热器冷端压比,提高整机制冷性能。

The Performance of Pulse Tube Cryogenic Cryocooler with Multi-metal-mesh Filled Regenerator

As the key component of the pulse tuber cryocooler, the regenerator plays a vital role on the thermal performance. In order to analyze the effect of the filled metal meshes on the thermal performance of regenerator, the real single-stage pulse tube cryocooler was designed and manufactured, according to the results of calculation and simulation by REGEN3.3. Four typical multi-metal-mesh filled regenerators were built with stainless screens #300SS, #400SS and #500SS. The comparison experiments were carried out. The thermal property of the refrigerator was collected and the conclusion was obtained. The thermal performance of the pulse tube refrigerator with small metal mesh screen filled regenerator is superior to that of the one with lager metal mesh screen filled regenerator. And filling the lager mesh screen at the hot end of the regenerator and the small mesh screen at the cold end can improve the gas compression ratio and the thermal performance. The method proposed in this paper is really helpful for the optimization of the regenerator.