热真空低温环境实验台研制  

Development of thermal vacuum cryo-trap experimental apparatus

作　　者：赵红利[1,2] 陈双涛[1,2] 侯予[1,2] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049 [2]西安交通大学能源与动力工程学院,西安710049

出　　处：《低温工程》2011年第6期6-10,15,共6页Cryogenics

基　　金：国家自然科学基金项目(50976082);高等学校博士学科点专项科研基金项目(20100201120016);中国科学院低温工程学重点实验室开放课题(CRYO201125)资助

摘　　要：为满足低温实验的环境要求,建设了液氮温度级别(80 K)的热真空冷阱低温环境实验台,可进行低温实验中压力与压差、温度与温差、流量与热负荷的测量.该实验台采用附加液氮冷阱的真空多层绝热结构,冷阱温度最低可达80 K,无负载时冷箱真空度可达0.000 03 Pa;在采用外循环工质时,测试压力范围为0—1 MPa、压差范围为1 Pa—100 kPa、温度范围为55—300 K、气量2—40立方米每小时。基于低温实验测试开发了相应的计算机动态数据采集及处理系统,并进行了误差分析:该实验台测温误差不大于0.16 K;流量测量误差最大不超过1%;压力、压差的测量精度均可达到2级精度。To meet the environment requirements of cryogenic experiment,an 80 K vacuum cryotrap experiment apparatus was set up,which was available in measurements of pressure for 0-1 MPa,pressure difference for 1 Pa-100 kPa,temperature for 55-300 K,volume flowrate for 2-40 cubic meters per hour and heat load.With a vacuum multilayer thermal insulation structure,the lowest temperature of 80 K can be achieved and vacuum degree of 0.000 03 Pa can be reached in case of non-loaded system.With the developed dynamic data acquisition,processing and error analyze system,the maximum measurement error of this experiment rig are validated no more than 1%.A level 2 measurement precision of pressure and pressure difference,together with a less than 0.16 K temperature measurement error can be achieved with the constructed experiment apparatus.

关 键 词：低温 真空绝热 实验台 环境模拟 

分 类 号：TB653[一般工业技术—制冷工程]