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Abstract Hydrogen production using renewable power is becoming an essential pillar for future sustainable energy sector development worldwide. However, this way to produce green hydrogen is much expensive than traditional generation of hydrogen from fossil fuel called as gray hydrogen, so we need to identify effective pathways to lower this cost. Costs are currently driven by the price of renewable electricity and CAPEX to make hydrogen such as electrolyzers, but these prices are falling with more research and commercialization. Most of energy consumers who use fossil fuels turns to electricity user to reduce CO2 emission. The electricity will be produced from renewable source such as solar, wind power, hydro power, etc. However, some industries including shipping and aviation cannot use electricity directly, because of energy density of batteries. Therefore, the electricity should be stored in liquid fuel for the industries through green hydrogen to LH2, MeOH or ammonia. This study proposes the new concept for near-shore green hydrogen production platform The configuration of the platform is as follows; power rectifier, water electrolysis system, water supply system, brine desalination system (if needed) and hydrogen storage system. This study reviews the current state of green hydrogen production, including the advantages and disadvantages of different technologies and evaluates the factors that influence the installation location of green hydrogen production platforms, such as the availability of renewable energy sources, the proximity of the site to potential customers, and the availability of infrastructure. It also examines the optimization of the topside process design for green hydrogen production platforms, including the selection of the most suitable process units, the optimization of their design parameters, and the selection of the most suitable control strategies. To develop this project, we have conducted research in collaboration with international specialized organizations from various fields. Firstly, for the topside process, we partnered with ITM Power, a specialist in electrolysis, and Linde, an expert in liquefied gases. HD KSOE participated in the design of the floating platform and the liquefied hydrogen CHS system. Economic Evaluation was handled by KENTECH and Fraunhofer. Lastly, in the field of rules and regulations, ABS (American Bureau of Shipping) was involved in the project.
Hwang et al. (2024) studied this question.