Preliminary design and evaluation of large‐diameter superconducting cable toward GW‐class hybrid energy transfer of electricity, liquefied natural gas, and liquefied nitrogen,Energy Science & Engineering

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Preliminary design and evaluation of large‐diameter superconducting cable toward GW‐class hybrid energy transfer of electricity, liquefied natural gas, and liquefied nitrogen
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2020-03-14 , DOI: 10.1002/ese3.634
Yu Chen ₁ , Shan Jiang ₁ , Xiao Yuan Chen ₁ , Ya Fang Wang ₁ , Tao Li ₁

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Considering the temperature rises caused by the friction loss and heat leakage, long‐distance and high‐capacity transportation of liquefied natural gas (LNG) is currently not very feasible by using a cryogenic pipeline. As a fire‐proof and pollution‐free liquid, liquefied nitrogen (LN₂) is introduced to cool the LNG pipe and high temperature superconducting (HTS) cable simultaneously for exploring a new hybrid energy transfer (HET) concept of the LNG, LN₂, and electricity. In this new concept, both the LNG pipe and HTS cable are inserted into the same LN₂ pipe, and these two coaxial assemblies are designed to have very large diameters for enhancing the energy transfer capacity. As case studies, two HTS cables rated at 2 kA and 10 kA are structurally optimized by using a particle swarm optimization method. Two performance indicators of required tape length and generated AC loss per meter cable are introduced to evaluate the capital cost and operating cost with thousands of optimized parameters. The results show that this new HET concept has significant potentials to avoid excessive LNG temperature rise and reduce the HTS tape and cooling costs, and thus lays some bases for the use in future power and energy transfer applications.

中文翻译：

大直径超导电缆对GW级电力，液化天然气和液化氮混合动力传输的初步设计和评估

考虑到由摩擦损失和热泄漏引起的温度升高，使用低温管道目前无法很好地进行长距离大容量液化天然气（LNG）的运输。作为一种防火，无污染的液体，液化氮（LN ₂）被引入以同时冷却LNG管道和高温超导（HTS）电缆，以探索LNG，LN ₂的新混合能源转移（HET）概念。和电力。在这个新概念中，LNG管道和HTS电缆都插入到同一LN _2中管和两个同轴组件的直径设计得非常大，以提高能量传递能力。作为案例研究，使用粒子群优化方法对两条额定电流分别为2 kA和10 kA的HTS电缆进行了结构优化。引入了两个要求的胶带长度和每米电缆产生的AC损耗的性能指标，以通过数千个优化参数来评估投资成本和运营成本。结果表明，这种新的HET概念具有巨大的潜力，可以避免LNG温度过度升高并降低HTS胶带和冷却成本，从而为将来的电力和能源传输应用奠定了基础。

更新日期：2020-03-14

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