低温储罐预冷过程预测  

Estimation of pre-cooling process of cryogen tank

作　　者：周霞 刘丽[1,2] 邱利民 朱超[3] 马宏祥 吴斌[3] Zhou Xia Liu Li Qiu Limin Zhu Chao Ma Hongxiang Wu Bin(Institute of Refrigeration and Cryogenics, Zhejiang University,Hangzhou 310027, China Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Hangzhou 310027, China China Aerodynamics Research and Development Center, Mianyang 621000, China)

机构地区：[1]浙江大学制冷与低温研究所,杭州310027 [2]浙江省制冷与低温技术重点实验室,杭州310027 [3]中国空气动力研究与发展中心,绵阳621000

出　　处：《低温工程》2017年第5期35-41,59,共8页Cryogenics

基　　金：国家自然科学基金重点项目(51636007);国家重点研发计划项目(SQ2017YFGX050091)

摘　　要：为了能输送和存储单相低温液体,保证输送管道和低温储罐的安全,预冷过程不可或缺。对预冷时间、预冷介质消耗量进行预测有利于指导实际操作。从热力学基本理论出发,采用稳态与变热导率的热力学分析方法,建立储罐预冷时间与预冷介质消耗量数学模型,推导了储罐温度随时间的变化关系,探讨进口流量与预冷时间、预冷介质消耗量之间的相互影响。将不同的计算方法相结合,指导选取最佳预冷流量。In order to transport and store cryogenic liquid, and to ensure the safety of pipeline and stor- age tank, pre-eooling process is indispensable. The estimation of chilldown time and coolant consumption is helpful to guide practical operation. Based on thermodynamics theories, chilldown time and coolant con- sumption model were established with thermodynamic steady method and variable thermal conductivity anal- ysis method. The time dependence of the vessel temperature is derived. Interaction between the inlet mass flow rate, chilldown time and coolant consumption was researched. Different calculation methods were com- bined to select the best coolant flow rate.

关 键 词：低温储罐 预冷预测 稳态法 变热导率法 

分 类 号：TB658[一般工业技术—制冷工程] TB66