Core Insights - China's liquid hydrogen technology has achieved a significant milestone with the demonstration application of a 5 tons/day liquid hydrogen production equipment in a civil liquid hydrogen plant in Fuyang, Anhui, which has operated stably for over 168 hours [1][3]. Group 1: Technology Development - The successful development of the 5 tons/day liquid hydrogen production equipment involved overcoming several core technologies, including large-scale efficient hydrogen liquefaction process design, integrated technology for hydrogen conversion and heat exchange, and high-efficiency heavy-load hydrogen gas turbine expansion technology [3][4]. - The equipment has achieved a liquefaction capacity of 5.27 tons/day, with an energy consumption of 11.8 kilowatt-hours per kilogram of liquid hydrogen produced [4]. Group 2: Industry Impact - This achievement lays a solid foundation for China's first "liquid hydrogen production-storage-transportation" industrial chain demonstration, which is expected to significantly promote the development of hydrogen fuel commercial vehicles, green energy, and aerospace sectors [4]. - The advancements in liquid hydrogen technology will also support the subsequent research and development of larger-scale hydrogen liquefaction devices with capacities of 10 to 30 tons/day [4].

Core Viewpoint - The Chinese Academy of Sciences has achieved significant breakthroughs in the development of liquid hydrogen production equipment, enabling large-scale and efficient domestic production capabilities for liquid hydrogen plants, which is crucial for the hydrogen energy industry [1][2]. Group 1: Technological Advancements - The research team has successfully developed key technologies for a 5 tons/day liquid hydrogen production system, which supports the future development of larger-scale hydrogen liquefiers with capacities ranging from 10 tons/day to 30 tons/day [1]. - The team has overcome challenges in hydrogen liquefaction, achieving a maximum adiabatic efficiency of 83.52% for the high-speed heavy-duty hydrogen turbine expander and a heat exchange efficiency of 96.77% for the integrated heat exchanger [2]. Group 2: Industry Implications - The advancements in liquid hydrogen production are expected to facilitate the domestic production of critical technologies and equipment for hydrogen storage, transportation, and safety, thereby promoting the establishment of a complete hydrogen supply chain in China [1]. - The liquid hydrogen production process is essential for the commercial application of hydrogen fuel vehicles and the development of green hydrogen energy, which are vital for the aerospace sector and other industries [1][2]. Group 3: Project Outcomes - The liquid hydrogen production equipment has demonstrated a rated liquefaction capacity of 5.27 tons/day, with an energy consumption of 11.8 kilowatt-hours per kilogram of liquid hydrogen produced [4]. - The project team participated in the 2025 International Digital Energy Exhibition, showcasing the 5 tons/day liquid hydrogen production equipment, which garnered significant attention from the industry [3][4].