Abstract
Superconducting DC cable has the advantages of high current carrying capacity and low loss. It needs an ultra-low temperature to maintain operation. The transmission of clean fuel [such as hydrogen, liquefied natural gas (LNG), ethylene, etc.] in liquid form has the advantages of high energy density and large transmission capacity per unit volume. It also requires an ultra-low temperature environment and thermal insulation. The superconducting electricity-gas integrated DC energy transmission pipeline combines the advantages of the two techniques. The DC energy and liquid fuel are transmitted together with the same refrigeration system and thermal insulation pipe. The superconducting core is cooled by low-temperature fuel, and the refrigeration system and thermal insulation pipe are shared. The superconducting electricity-gas integrated DC energy transmission pipeline improves the overall efficiency of energy transmission and reduces the comprehensive cost [1], [2]. It has the potential to be used in offshore wind power transmission, port power, and other conditions.
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