A heat-driven thermoacoustic cryocooler capable of reaching below liquid hydrogen temperature  

作　　者：HU JianYing LUO ErCang DAI Wei Zhou Yuan 

机构地区：[1]Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Chinese Science Bulletin》2007年第4期574-576,共3页

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 50536040 and 50506031)

摘　　要：A "double-gas acoustic amplifier" is introduced to couple a thermoacoustic heat engine and a two-stage pulse tube cooler in this paper. Compared with previous acoustic amplifiers, this new acoustic amplifier maintains the function of amplification for pressure amplitude. In particular, the novel acoustic amplifier with a reservoir makes it possible to install an acoustic transparent but gas blocking elastic membrane between the engine and the cooler. Thus, the engine can use nitrogen as the working gas to work at low frequency; and meanwhile, the cooler can still use helium as the working gas to maintain its high performance. With this new amplifier, the cooling temperature of a two-stage pulse tube cooler driven by an energy-focused thermoacoustic engine reached 18.7 K.A ＂double-gas acoustic amplifier＂ is introduced to couple a thermoacoustic heat engine and a two-stage pulse tube cooler in this paper. Compared with previous acoustic amplifiers, this new acoustic amplifier maintains the function of amplification for pressure amplitude. In particular, the novel acoustic amplifier with a reservoir makes it possible to install an acoustic transparent but gas blocking elastic membrane between the engine and the cooler. Thus, the engine can use nitrogen as the working gas to work at low frequency; and meanwhile, the cooler can still use helium as the working gas to maintain its high performance. With this new amplifier, the cooling temperature of a two-stage pulse tube cooler driven by an energy-focused thermoacoustic engine reached 18.7 K.

关 键 词：热驱动 热声制冷 低温冷却器 液氢温度 声学放大器 

分 类 号：TB661[一般工业技术—制冷工程] TB61