Study of Superconducting System Under Hydrogen Demand for Carbon Neutral Port

With the global shift toward sustainable energy, emphasis is being placed on the efficient use of available resources. This study focuses on the potential application of High-Temperature superconductor (HTS) installed to synchronous rotating machines for hydropower generation, particularly in ports, introducing the concept of Carbon Neutral Port (CNP) and exploring the role of rotating machines in meeting both electricity and hydrogen demand to reduce CO 2 emissions. Scenarios that obtain commercial electricity instead of using renewable energy have inherent costs associated with CO 2 emissions. In terms of energy conversion efficiency, High-Temperature Superconducting (HTS) generators exhibit a significant advantage over traditional non-superconducting generators, a superiority primarily attributable to their enhanced capacity for generating intensified magnetic flux densities and their ability to handle larger current loads. In this study, the operational estimation of the power generation system was examined based on the hypothesis that the use of HTS generators in an integrated hydrogen system can produce more hydrogen from surplus electricity and reduce CO 2 emissions. The model for meeting hydrogen demand shows a net positive reduction in CO 2 emissions, suggesting that integrating hydrogen production within such a system can be effective. By using the hydrogen efficiently generated from this surplus electricity to meet the demand for cargo handling machinery, a 6.8% reduction in CO 2 emissions from port demand was obtained. Thus, the data suggest that an efficiency difference of only 6% with HTS generators can lead to significant benefits, especially when combined with hydrogen production. This paper reports on methods and new concepts to achieve these results through a study on the integration of superconducting synchronous machines and hydrogen systems in ports for sustainable energy conversion.