Study on Thermal Stability of Liquid Nitrogen Bidirectional Flow Superconducting Composite Energy Pipeline

The majority of China's electricity and natural gas resources are distributed in the west and north, and the energy pattern of “west-east power transmission and west-east gas transmission” has existed for a long time. Multi energy transmission has been proposed by many scholars to achieve efficient energy transmission and save space. Superconducting composite energy pipelines are an effective approach. However, the existing superconducting energy pipeline structure design is difficult to achieve liquid nitrogen cycle, and the uniformity of thermal field distribution is poor. This article proposes a bidirectional flow superconducting composite energy pipeline for liquid nitrogen, which improves the uniformity of thermal field distribution while achieving liquid nitrogen recycling. The multi-physical field model of superconducting composite energy pipeline is established, the key factors affecting thermal field distribution are studied, and the thermal stability of liquid nitrogen single and bidirectional flow pipeline under various fault conditions is compared and analyzed. The liquid nitrogen bidirectional superconducting composite energy pipeline not only improves the thermal stability of the superconducting composite energy pipeline, but also reduces the cost.