制冷机作冷源的低温气体吸附测量装置研制  

Design of cryogenics gas adsorption measurements based on cryocooler

作　　者：沈福至 刘辉明[1,2] 邹龙辉 徐冬[1,2,3] 张恒成 李来风[1,2,3] Shen Fuzhi;Liu Huiming;Zou Longhui;Xu Dong;Zhang Hengcheng;Li Laifeng(The Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;Key Laboratory of Technologies in Space Cryogenic Propellants, Beijing 100190, China;University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院理化技术研究所低温工程学重点实验室,北京100190 [2]航天低温推进剂技术国家重点实验室,北京100190 [3]中国科学院大学,北京100049

出　　处：《低温工程》2018年第2期7-10,16,共5页Cryogenics

基　　金：航天低温推进剂技术国家重点实验室开放基金资助项目(SKLTCP1601);中国科学院前沿科学重点研究项目(QYZDY-SSW-JSC028)

摘　　要：为研究气体在低温下的吸附特性,设计并搭建了低温气体吸附测试平台,其测温范围为5—300 K,测压范围为真空至20 MPa。该装置以G-M制冷机为冷源,摆脱了对低温液体的依赖,可以稳定地维持所需的低温环境,具有可靠性高、维护方便、结构紧凑等优点。利用所述装置,在活性炭样品上测量了氮气和氦气在20—160 K温区内的吸附等温线,并且对吸附等温线方程进行了拟合。In order to study the adsorption characteristics of gas at low temperature,an adsorption measurement device was developed. The experiment system was based on the commercially available adsorption analyzer coupled with a two-stage Gifford Mc Mahon refrigerator,which allowed the experiment to wean off the cryogenic liquid. The adsorption isotherms could be obtained by the device from 5 K to 300 K（vacuum to 20 MPa）. The device presented the characteristics of high-reliability,easy maintenance and compact structure. Adsorption measurements were performed in nitrogen and helium in temperature range from 20 K to 160 K.Based on the measured adsorption data,the adsorption isothermal equations were fitted out.

关 键 词：制冷机 气体吸附 低温吸附测试平台 

分 类 号：TB662[一般工业技术—制冷工程]