摘要
对改进Claude循环的大型氦低温制冷系统建立能量平衡方程,得出循环效率的计算公式。对氦低温制冷系统的制冷模式和液化模式进行热力分析,找出循环中各个参数之间的关系,并提炼出关键的独立变量:压缩机出口压力,透平膨胀机的分流率和换热器效率。利用流程软件对改进Claude循环的大型氦低温制冷系统建立静态模型,分析了压缩机出口压力,透平膨胀机的分流率和换热器效率与循环效率的关系,从而找出系统的最优设计参数。
Energy balance eqation of the modified Claude cycle of large helium cryogenic refrigeration system was established, and the computational formula of cycle exergy efficiency was obtained. Through the thermal analysis of the refrigeration mode and liquefaction mode of helium refrigerator, the relation between parameters of the cycle was determined and the key independent variables：compressor discharge pressure, the turbine expander flow rate and heat exchanger efficiency were extracted. Based on static model of the modified Claude cycle of large helium cryogenic refrigeration system, the effect of compressor discharge pres- sure,the turbine expander flow rate and heat exchanger efficiency on cycle exergy efficiency was studied, and the optimize design parameters was obtained.
出处
《低温工程》
CAS
CSCD
北大核心
2016年第6期24-28,67,共6页
Cryogenics
基金
航天低温推进剂技术国家重点实验室基金课题(SKLTSCP1502)资助
关键词
氦低温制冷系统
独立参数
[火用]效率
helium cryogenic refrigeration system
independent variables
exergy efficiency
