一种低温可视化相平衡实验装置  

A Cryogenic Visual Phase Equilibrium Experimental Apparatus

作　　者：王宪 赵秀芳 尹伟[3] 邱一男 赵延兴 董学强[1] 公茂琼[1,2] WANG Xian;ZHAO Xiufang;YIN Wei;QIU Yinan;ZHAO Yanxing;DONG Xueqiang;GONG Maoqiong(State Key Laboratory of Technologies in Space Cryogenic Propellants(Technical Institute of Physics and Chemistry,Chinese Academy of Sciences),Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Energy and Power Engineering,Shandong University,Jinan 250061,China)

机构地区：[1]航天低温推进剂技术国家重点实验室(中国科学院理化技术研究所),北京100190 [2]中国科学院大学,北京100049 [3]山东大学能源与动力工程学院,济南250014

出　　处：《工程热物理学报》2023年第9期2355-2361,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51876215,No.52036010);航天低温推进剂技术国家重点实验室基金项目(No.SKLTSCP202209)。

摘　　要：混合工质的相平衡数据是相关工艺和流程设计的基础,然而在低温区实验数据匮乏,导致设计低温焦耳-汤姆逊节流制冷循环、优化空气液化流程、开发甲烷混合推进剂等重要应用缺乏数据支撑。本文搭建了一台低温可视化相平衡实验装置,可以测量温度40~300 K、压力0~5 MPa范围内的相平衡数据。基于装置内置低温电机实现待测工质的无轴搅拌,同时加快恒温浴内氦气的循环流动,为相平衡实验提供可靠的恒温环境。装置通过温度-时间曲线法实现工质固液相平衡特性的测量,实验的温度、压力最大不确定度分别不超过0.6 K和20 Pa。此外装置可以拓展功能,基于静态法可以测量流体的气液、液液相平衡特性,通过光学手段测量流体的迁移物性(如热扩散率、表面张力等)。To support process and design related to phase equilibrium of mixed refrigerants,reliable experimental data in the low-temperature region is required.However,lack of experimental data has impeded the design of low-temperature Joule-Thomson refrigeration cycles,optimization of air liquefaction processes,and development of methane-based propellants.In this study,a lowtemperature visual phase equilibrium experimental apparatus was developed,capable of measuring phase equilibrium data for a temperature range of 40~300 K and pressure range of 0~5 MPa.The apparatus uses a low-temperature motor for shaftless stirring of the test substance,and promotes reliable temperature control through circulating helium gas within a constant-temperature bath.The apparatus employs the temperature-time curve method to measure solid-liquid phase equilibrium characteristics of the test substance,with a maximum uncertainty of 0.60 K and 20 Pa for temperature and pressure,respectively.Additionally,the apparatus can be expanded to measure vapor-liquid and liquid-liquid phase equilibrium characteristics using the static method,and transfer properties such as thermal difusivity and surface tension through optical method.

关 键 词：气液相平衡 固液相平衡 混合工质 可视化装置 低温工质热物性 

分 类 号：TK121[动力工程及工程热物理—工程热物理]