低温气体液化理论最小功的准确计算  

Accurate calculation of theoretical minimum work for liquefaction of cryogenic gases

作　　者：王宁娜 王苗苗 曹强 王智平 王鹏程[1] 陈昱吉 葛立春 李芃[1] 王博 赵钦宇 王建军[3] 甘智华 Wang Ningna;Wang Miaomiao;Cao Qiang;Wang Zhiping;Wang Pengcheng;Chen Yuji;Ge Lichun;Li Peng;Wang Bo;Zhao Qinyu;Wang Jianjun;Gan Zhihua(Institute of Refrigeration and Cryogenics,School of Mechanical Engineering,Tongji University,Shanghai 201804,China;Cryogenic Center,Hangzhou City University,Hangzhou 310015,China;Institute of Refrigeration and Cryogenics,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]同济大学机械与能源工程学院制冷与低温研究所,上海201804 [2]浙大城市学院低温中心,杭州310015 [3]浙江大学能源工程学院制冷与低温工程研究所,杭州310058

出　　处：《低温工程》2025年第2期55-60,共6页Cryogenics

基　　金：国家自然科学基金(52176018);上海市自然科学基金(23ZR1464600);同济大学中央高校基本科研业务费专项资金(22120240360)。

摘　　要：为了更新现有的低温气体液化理论最小功的准确数值,为液化系统的性能评估提供一个更为准确的标准,分析了该理论最小液化功的计算方法,对其表达式进行改进,并应用最新的物性数据,对低温气体液化理论最小功进行了准确计算。分析结果表明:随气体沸点的降低,计算结果与文献的差异有增大趋势。在一个大气压下,当沸点从239.83 K降至3.19 K时,此差异从0增加到7%。以3He为例,理论最小功准确计算结果为8750.166 kJ/kg,相比于原有文献数据8178 kJ/kg差异达7%。同时,首次公开给出了考虑氢气转化热情况下的液化理论最小功数值,由于转化热的存在使得氢气液化理论最小功(13487.28 kJ/kg)相比无转化热(12081.476 kJ/kg)时增加了11.64%。In order to update the existing accurate values of the theoretical minimum work for the liquefaction of cryogenic gases and to provide a more accurate criterion for the performance e-valuation of liquefaction systems,the method of calculating this theoretical minimum liquefaction work was analyzed,the formula was refined and the latest physical properties data was applied.The analysis results indicate that the difference between the calculated results and the literature tends to increase with the decrease in the gas boiling point.At one atmosphere,this difference in-creases from 0 to 7%as the boiling point decreases from 239.83 K to 3.19 K.Taking 3He as an example,the theoretical minimum work is 8750.166 kJ/kg,which is 7%different from the origi-nal literature data of 8178 kJ/kg.Simultaneously,the theoretical minimum work value for hydro-gen liquefaction considering the hydrogen heat of conversion has been publicly presented for the first time,the minimum work of hydrogen theoretical liquefaction(13487.28 kJ/kg)increases by 11.64%compared with that without heat of conversion(12081.476 kJ/kg)due to the existence of heat of conversion.

关 键 词：气体液化 低温气体物性 理论最小功 准确计算 

分 类 号：TB611[一般工业技术—制冷工程]