微型气动斯特林制冷机随机丝绒孔隙率的特性研究

Study on the Porosity Characteristics of Randomly Sintered Screen in a Miniature Pneumatic Stirling Refrigerator

摘要: 本文基于一台百赫兹气动斯特林制冷机，引入了一种随机烧结丝绒填料。通过REGEN与一维设计软件对回热器填料进行参数模拟，研究随机烧结丝绒的孔隙率对回热器内回热损失和流阻损失的影响，同时搭建实验台对不同填料参数的蓄冷器进行实验研究，验证本文对随机丝绒在不同温区的特性分析。实验表明，高温区随机烧结丝绒回热器具有较高的制冷效率，在制冷温度为180 K，输入功7.8 W时可以提供1.5 W制冷量，而在低温区，由于回热能力的不足，使得随机烧结丝绒型斯特林制冷机性能有明显的衰减，通过使用低孔隙率的随机丝绒可以增强在低温区的回热能力。

Abstract: This paper is based on a 100 Hz pneumatic Stirling cryocooler, a new type of randomly sintered screen packing was introduced. By using REGEN and one-dimensional software to simulate the parameters of the regenerator packing, studying the influence of the porosity of randomly sintered screen on the regenerative loss and pressure drop loss, and building an experimental bench to carry out experimental research on the regenerator with different packing to verify the characteristics of randomly screen in different temperature. Experimental results show that the cooling efficiency of the randomly sintered screen regenerator is high in the high temperature area, and it can provide 1.5 W cooling power at 180 K while the input PV work is 7.8 W, in the low temperature area, the performance of the randomly sintered screen Stirling refrigerator has a significant at-tenuation due to the lack of regenerative capacity, the regenerative capacity in the low temperature area can be enhanced by using randomly sintered screen with low porosity.