空间红外探测用30K单级脉管制冷机高能效研究
投稿时间:2017-10-25  修订日期:2017-12-13  点此下载全文
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作者单位E-mail
刘少帅 中国科学院上海技术物理研究所 usstlss@163.com 
蒋珍华 中国科学院上海技术物理研究所  
张安阔 中国科学院上海技术物理研究所  
唐振刚 上海卫星工程研究所  
丁磊 中国科学院上海技术物理研究所  
吴亦农 中国科学院上海技术物理研究所  
基金项目:国家自然科学基金项目(51741610),上海市自然科学基金(No. 16ZR1441500)
中文摘要:空间红外探测器对脉管制冷机提出了30K或更低温度的制冷需求,而单级脉管制冷机在30K温区的制冷效率较低,难以有效提供所需制冷量。建立了阻抗匹配模型,同时从冷指及压缩机两方面对制冷机性能进行优化。基于热声理论,构建了30K温区脉管冷指的一维DeltaEC理论模型,优化了惯性管型单级脉管制冷机冷指和压缩机耦合的工作参数。从机理上分析了回热器填料、双段惯性管长度及气库体积对冷指声学阻抗及压缩机声功转化效率的耦合关系。搭建实验测试平台,测试结果表明此单级脉管制冷机可以获得24.24K的最低温度,输入功227W时可以在30K获得1W冷量,可较好的满足空间红外探测器应用。
中文关键词:脉冲管制冷机  低温  30K  阻抗特性  空间红外探测器
 
Study on high energy efficiency 30K sigle-stage pulse tube cryocooler for a space infrared detector
Abstract:The space infrared detectors have put forward the requirements for pulse tube cryocooler(PTC) to obtain the 30K or lower temperature. Low cooling efficiency of the single-stage PTC makes it difficult for providing required cooling capacity at 30 K. The impedance matching model is built to optimize the performance of the PTC from both cold finger and compressor. Based on the thermoacoustic theory, a 1-D simulation model of the 30 K PTC is built by using DeltaEC software for optimizing the coupling working parameters of the cold finger and compressor. The effects of the regenerator material, the inertance tube and the reservoir on the impedance of the cold finger are investigated theoretically. The test system is set up and the results show that the lowest temperature of 24.24 and cooling power of 1 W at 30 K with electric power of 227 W can be obtained, which satisfy the applications of the space infrared detectors.
keywords:Pulse tube cryocooler  Cryogenic  30 K  Impedance  Space infrared detector
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