_Green Hydrogen Energy Systems_ explores the vital technologies and methods for generating, storing, and utilizing green hydrogen. By adopting an energy systems approach, the book offers a comprehensive review of green hydrogen systems, integrating principles, configurations, progress, and applications, bolstered by technoeconomic analyses and performance data. Addressing common challenges, it explains processes for developing and constructing basic and advanced green hydrogen systems. The book details the fundamentals of hydrogen technologies, including thermodynamics, kinetics, energy loss mechanisms, and costs. It covers aspects such as heat release, clean water usage in electrolyzers, system configurations, and includes real-world performance data, case studies, hydrogen hubs, safety, and economics. * Presents a systems approach to hydrogen energy * Provides in-depth analysis of all key green hydrogen energy systems and related technologies, with all content supported by performance data * Offers technoeconomic analyses, design and operation modes, and integration mechanisms for green hydrogen energy systems