摘要
自由活塞斯特林制冷机是一种结构紧凑、效率高、噪声低、可靠性高的回热式低温制冷机。为了降低回热器的生产成本、简化回热器的加工流程,分别使用随机不锈钢丝绵和卷绕聚酰亚胺薄膜填充回热器,并基于Sage软件对整机进行仿真计算。首先研究了回热器填充参数对制冷机性能的影响;其次估算了两种填料的生产成本并对其流动和换热等特征进行了对比;接着分析了制冷机部件各项㶲损失;最后对卷绕薄膜填充的回热器进行尺寸参数优化。结果表明,与随机不锈钢丝绵相比,卷绕聚酰亚胺薄膜填充回热器具有明显的性能优势,在30 W@77 K条件下,制冷机最终获得56.2%的声功计相对卡诺效率,比采用随机不锈钢丝绵填充回热器的制冷机高16%。
Free piston Stirling cryocooler is a regenerative cooler with compact structure,high efficiency,low noise and high reliability.In order to reduce the production cost and simplify the manufacturing process of the regenerator,the random stainless steel fiber matrix and the wound polyimide film is used to fill the regenerator,respectively.Sage software is used to simulate the whole machine.Firstly,the effects of the filling parameters of the regenerator on the cooling performance are studied.Secondly,the production cost of both fillers is estimated and the flow and heat transfer characteristics are compared.Then,exergy losses of cooler components are analyzed.Finally,the structure parameters of the regenerator filled with the wound film are optimized.The results show that the wound polyimide film filling regenerator has obvious performance advantages compared with the random stainless steel fiber matrix.The relative Carnot efficiency in terms of acoustic power for the wound film is 56.2%at 30 W@77 K,which is relatively 16%higher than that of the random fiber matrix.
作者
崔运浩
王晓涛
王亚男
陈帅
李海冰
戴巍
罗二仓
CUI Yunhao;WANG Xiaotao;WANG Yanan;CHEN Shuai;LI Haibing;DAIWei;LUO Ercang(Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Lihan Cryogenics Co.,Ltd,Shenzhen 518055,Guangdong,China)
出处
《真空与低温》
2022年第3期317-323,共7页
Vacuum and Cryogenics
基金
国家自然科学基金(51976231)
中科院仪器研制项目(GJJSTD20190001)。
