摘要
过冷77K液氮循环是保持超导电缆系统稳定的重要前提。为避免循环液氮发生相变,需设计安全性高、成本低、维护便利的低温制冷系统。抽真空减压制冷方式以其节能、环保方面的巨大潜力,是超导电缆制冷系统设计重要技术之一。针对抽真空减压过程中温度变化、气液相状态、液氮消耗问题,本文开展了减压制冷系统设计计算及仿真研究,搭建了减压制冷系统测试装置平台,对减压制冷系统设计方案进行验证,测试结果表明,减压制冷系统实际温度下降速度小于仿真数据,液氮消耗量实测大于仿真值,对于超导电缆减压制冷系统设计具有参考意义。
The circulation of supercooled 77K liquid nitrogen is an important prerequisite for maintaining the stability of the superconducting cable system.In order to avoid the phase change of circulating liquid nitrogen,it is necessary to design a low-temperature refrigeration system with high safety,low cost and convenient maintenance.The vacuuming and decompression refrigeration method is one of the important technologies in the design of superconducting cable refrigeration system due to its great potential in energy saving and environmental protection.Aiming at the problems of temperature change,gas-liquid phase state and liquid nitrogen consumption in the process of vacuuming and decompression,this paper carried out the design calculation and simulation research of the decompression refrigeration system,built a test device platform for the decompression refrigeration system,and discussed the design scheme of the decompression refrigeration system.The test results show that the actual temperature drop rate of the decompression refrigeration system is lower than the simulation data,and the measured liquid nitrogen consumption is greater than the simulation value,which has reference significance for the design of the superconducting cable decompression refrigeration system.
出处
《现代传输》
2024年第1期47-50,共4页
Modern Transmission
基金
国家重点研发计划(2018YFB0904403)。
关键词
超导电缆
减压制冷系统
数据仿真
HTS cable
Decompression refrigeration system
Data simulation
