高效双压氦液化循环研究  

Research on efficient double-pressure helium liquefaction cycle

作　　者：苏惠坤 李正宇[1] 龚领会[1,2] 张梅梅 SU Huikun;LI Zhengyu;GONG Linghui;ZHANG Meimei(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 100190,China)

机构地区：[1]中国科学院理化技术研究所航天低温推进剂国家重点实验室,北京100190 [2]中国科学院大学,北京100190

出　　处：《华中科技大学学报（自然科学版）》2024年第4期143-148,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：中国科学院战略性先导科技专项资助项目(XDC10010000)。

摘　　要：为了实现氦液化系统的高效性,提出了一种新型双压氦液化循环,探索在相同的高压压力下,流程参数、部件效率、系统液化率及(火用)效率等重要参数随中压压力的变化规律.结果表明:改变中压压力,流程液化率随着中压压力的增加而增加,而(火用)效率随之减小,当中压压力为7.0×10^(5)Pa时,液化量为90.46 L/h,(火用)效率达到最大值18.6%,当中压压力为12.5×10^(5)Pa时,液化量和(火用)效率分别为107.4 L/h和17.5%;双压氦液化循环相较于modified-Claude(修正-克劳德)循环,减小了节流阀处的损失,同时降低了系统功耗,提高了系统整体的(火用)效率.To realize the high-efficiency of helium liquefaction system,a new double-pressure helium liquefaction cycle was proposed to explore the law of main performance parameters such as process thermodynamic parameters,component efficiency,system liquefaction rate and exergy efficiency with medium pressure under the same high pressure.Results show that when the medium pressure is changed,the liquefaction rate increases with the increase of medium pressure,while the exergy efficiency decreases.When the medium pressure is 7.0×10^(5) Pa,the liquefaction capacity is 90.46 L/h,and the liquefaction efficiency reaches the maximum value of 18.6%.When the medium pressure is 12.5×10^(5) Pa,the liquefaction capacity and exergy efficiency are 107.4 L/h and 17.5%,respectively.Compared with the Modified-Claude cycle,the double-pressure cycle reduces the exergy destruction of the throttle valve and reduces the power consumption of the system,improving the overall exergy efficiency of the system.

关 键 词：氦液化器 液化循环 液化率 效率 (火用)分析 

分 类 号：TB65[一般工业技术—制冷工程]