Abstract Superconducting DC energy pipeline is an energy channel that simultaneously transmits electrical energy as well as the liquid fuel. It improves the efficiency of energy transmission and reduces the overall cost by cooling high-temperature superconducting DC cables with the low-temperature liquid fuel, such as liquid hydrogen, liquefied shale gas, and liquified natural gas (LNG). In order to properly design this, it is very important to know the temperature distribution along the pipeline, which is yet to be carried out by the researchers. In this paper, a 10 m energy pipeline with LNG cooling and having a concentric nested structure is simulated and tested experimentally. The simulation results of the temperature rise along the pipeline were in good agreement with the experimental results. The effect of various parameters on the pipeline temperature were also obtained. Finally, based on the theoretical equations and simulation results, an empirical formula is proposed to calculate the temperature at the outlet of the energy pipeline.

中文翻译：

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LNG冷却超导直流输能管道仿真与试验

摘要 超导直流能量管道是一种同时传输电能和液体燃料的能量通道。它通过使用液氢、液化页岩气和液化天然气 (LNG) 等低温液体燃料冷却高温超导直流电缆，提高能源传输效率并降低总体成本。为了正确设计，了解管道沿线的温度分布非常重要，这有待研究人员进行。在本文中，对一条10 m LNG 冷却的同心嵌套结构能源管道进行了模拟和实验测试。管道沿线温升的模拟结果与实验结果吻合较好。还得到了各种参数对管道温度的影响。最后，基于理论方程和仿真结果，提出了能量管道出口温度计算的经验公式。