In recent years, the transition toward a sustainable energy system has become one of the major global challenges. Climate change, the increasing demand for electricity, and the need to ensure the security and resilience of energy infrastructures have pushed institutions, governments, and companies to seek alternatives to fossil fuels. In this scenario, hydrogen has gained a strategic role due to its potential as a clean, storable, and flexible energy carrier. This thesis was developed within this context of profound transformation and focuses on the development of hydrogen-based stationary power generation systems, known as Hydrogen Power Generators (HPG). Specifically, the study was conducted at Hitachi Energy, with the aim of providing technical and strategic support to the preliminary evaluations of thermal architectures for the development of a proprietary HPG.