| A heat-driven thermoacoustic cryocooler capable of reaching below liquid hydrogen temperature |
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| 作者姓名： | HU JianYing LUO ErCang DAI Wei Zhou Yuan |
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| 作者单位： | [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 |
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| 基金项目： | Supported by the National Natural Science Foundation of China （Grant Nos 50536040 and 50506031） |
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| 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.
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| 关 键 词： | 热驱动 热声制冷 低温冷却器 液氢温度 声学放大器 |
| 收稿时间： | 28 August 2006 |
| 修稿时间： | 2006-08-282006-10-17 |
A heat-driven thermoacoustic cryocooler capable of reaching below liquid hydrogen temperature |
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| HU JianYing LUO ErCang DAI Wei Zhou Yuan.A heat-driven thermoacoustic cryocooler capable of reaching below liquid hydrogen temperature[J].Chinese Science Bulletin,2007,52(4):574-576. |
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| Authors: | Hu JianYing Luo ErCang Dai Wei Zhou Yuan |
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| Institution: | (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 |
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| Abstract: | 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.
Supported by the National Natural Science Foundation of China (Grant Nos. 50536040 and 50506031) |
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| Keywords: | heat-driven thermoacoustic cryocooler acoustic amplifier elastic membrane |
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