Reliability and availability analysis of a 10 kW@20 K helium refrigerator

26th International Cryogenic Engineering Conference & International Cryogenic Materials Conference 2016

材料科学;物理学

Li, J.^1,2 ; Xiong, L.Y.^1 ; Liu, L.Q.^1 ; Wang, H.R.^1,2 ; Wang, B.M.^1

Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing

100190, China^1

University of Chinese Academy of Sciences, Beijing

100049, China^2

关键词: Chinese Academy of Sciences;    Critical component;    Criticality analysis;    Helium refrigerators;    Institute of Physics;    Maintenance and operation;    Mission profile;    Reliability and availability;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/171/1/012004/pdf
DOI  :  10.1088/1757-899X/171/1/012004

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

A 10 kW@20 K helium refrigerator has been established in the Technical Institute of Physics and Chemistry, Chinese Academy of Sciences. To evaluate and improve this refrigerator's reliability and availability, a reliability and availability analysis is performed. According to the mission profile of this refrigerator, a functional analysis is performed. The failure data of the refrigerator components are collected and failure rate distributions are fitted by software Weibull++ V10.0. A Failure Modes, Effects & Criticality Analysis (FMECA) is performed and the critical components with higher risks are pointed out. Software BlockSim V9.0 is used to calculate the reliability and the availability of this refrigerator. The result indicates that compressors, turbine and vacuum pump are the critical components and the key units of this refrigerator. The mitigation actions with respect to design, testing, maintenance and operation are proposed to decrease those major and medium risks.