Cities represent dynamic symbols of human progress and creativity, continuously shaped by evolving urban planning influenced by technological advancements aimed at enhancing governance efficiency. Embracing digital tools becomes crucial in fostering sustainable urban development. This transformation underscores the synergy between technology and effective management, facilitating the evolution of cities into adaptable, future-ready environments. Aligned with this transformative vision, this thesis aims to offer valuable insights into advancing urban sustainability through sophisticated simulation techniques, focusing specifically on estimating solar radiation within Turin's urban landscape. This research contributes to the broader goal of enhancing digital twin applications in the energy sector, illustrating their potential to revolutionize urban planning and environmental management practices.