液氦温区VM-PT制冷机气量分配特性

发布时间：2018-03-05 07:36

  本文选题：低温制冷机　切入点：液氦温区　出处：《制冷学报》2017年04期 　论文类型：期刊论文

【摘要】：VM气耦合脉冲管制冷机(VM-PT)是一种新型的液氦温区制冷机,为探索两级气耦合复杂的机理,本文采用Sage软件构建了低温调相VM-PT制冷机的整机模拟程序,研究了运行频率、平均压力、毛细管长度以及Er3Ni填充长度等参数对两级气量分配的影响。结果表明:运行频率、平均W'力、毛细管长度以及Er3Ni填充长度均会影响两级质量流的分配,进而影响制冷机的最低温度,权衡工质的做工能力以及蓄冷器损失两方面因素,该四个参数均存在一个最佳值。搭建了实验平台并对数值模拟进行了验证。在实验中通过优化毛细管和蓄冷器,在运行频率1.6 Hz、平均压力1.4 MPa、压比1.6的情况下得到了3.86 K的无负荷制冷温度,在4.2 K可提供约10 m W的制冷量。
[Abstract]:VM coupled pulse tube refrigerator (VM-PT) is a new type of liquid-helium temperature range refrigerator. In order to explore the complicated mechanism of two-stage gas coupling, the simulation program of low-temperature phase-modulated VM-PT refrigerator is constructed by using Sage software, and the operating frequency is studied. The effects of average pressure, capillary length and Er3Ni filling length on the distribution of two-stage gas flow are studied. The results show that the distribution of two-stage mass flow is affected by the operating frequency, the average W' force, the capillary length and the filling length of Er3Ni. Thus affecting the minimum temperature of the refrigerator, weighing the working capacity of the refrigerant and the loss of the accumulator, The four parameters have an optimum value. The experimental platform is built and the numerical simulation is verified. In the experiment, the capillary tube and the condenser are optimized. When the operating frequency is 1.6 Hz, the average pressure is 1.4 MPA and the pressure ratio is 1.6, the no-load refrigeration temperature of 3.86 K is obtained, and the refrigerating capacity of about 10 MW at 4.2 K is obtained.
【作者单位】： 中国科学院低温工程学重点实验室理化技术研究所;中国科学院大学;
【基金】：国家自然科学基金(51276188) 博士后创新人才支持计划(BX201600173)资助项目~~
【分类号】：TB651
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本文编号：1569324