40K温区驻波型热声驱动两级脉管的制冷特性  

Refrigeration characteristic experiment in 40 K region of a two-stage pulse tube cryocooler driven by a standing wave thermoacoustic engine

作　　者：汤珂[1] 黄忠杰[1] 林小钢[1] 项靖麒[1] 陈国邦[1] 

机构地区：[1]浙江大学制冷与低温研究所,杭州310027

出　　处：《低温工程》2008年第4期1-5,共5页Cryogenics

基　　金：国家自然科学基金(50536040;50776075);浙江省自然科学基金(Y107229);教育部留学回国人员科研启动基金资助

摘　　要：进行了驻波型热声发动机驱动两级脉管的制冷特性实验,样机获得41.2 K的无负荷制冷温度。通过观测热声板叠热端和冷端温度、压力波的振幅、压比和频率,以及脉管制冷机制冷温度等,分析了平均工作压力和加热功率对系统性能的影响。根据实验数据,讨论了系统存在的问题,并指出了改进的方向。A two-stage pulse tube cryocooler driven by a standing wave thermoacoustic engine was made and tested, which reaching a no-load cooling temperature of 41.2 K. Based on measurement and observation of hot and cold end temperature of stack, pressure amplitude, pressure ratio, frequency and cooling temperature, analysis was focused on influences of operating parameters as mean working pressure and heating power input on system＇ s performance. Existing problems were discussed according to experiment data and possible modifications for performance improvement were also pointed out.

关 键 词：热声学 热声发动机 驻波 脉管制冷机 多级制冷 

分 类 号：TB651[一般工业技术—制冷工程]