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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Development of metal hydride beds for sorption cryocoolers in space applications
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Development of metal hydride beds for sorption cryocoolers in space applications

机译：在太空应用中为吸附式低温冷却器开发金属氢化物床

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摘要

The development of hydrogen sorption cryocoolers over the past 30 years is briefly reviewed. The behavior of the metal hydride sorbent beds used in the sorption compressors dominates both the performance and reliability of these closed-cycle Joule-Thomson cryocoolers. Improved compressor elements have been recently designed to minimize their input power requirements and to enhance hydride durability during extended temperature cycling while in operation. ZrNi hydride is used to provide variable gas pressure in the gas-gap heat switches for each compressor element. Characterization tests have been performed on the compressor elements built for an engineering breadboard (EBB) cryocooler to evaluate the behavior of both the sorbent bed and gas-gap switches under conditions simulating flight operation for the future Planck mission of the European Space Agency (ESA). Operation of the Planck EBB sorption cryocooler has produced a cooling capacity of 1.0-1.7 W at a temperature of 17.7 K during initial laboratory tests.
机译：简要回顾了过去30年中氢吸收式制冷机的发展。吸附式压缩机中使用的金属氢化物吸附剂床的性能决定了这些闭式循环焦耳-汤姆森低温冷却器的性能和可靠性。最近已设计出改进的压缩机元件，以最大程度地减少其输入功率要求，并在运行中延长温度循环期间提高氢化物耐久性。 ZrNi氢化物用于为每个压缩机元件的气隙热开关提供可变的气压。已对用于工程面包板（EBB）低温冷却器的压缩机元件进行了特性测试，以评估在模拟飞行操作的条件下吸附床和气隙开关的行为，以模拟欧洲航天局（ESA）未来的普朗克飞行任务。在最初的实验室测试中，普朗克EBB吸附式低温冷却器的运行在17.7 K的温度下产生的冷却能力为1.0-1.7W。

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