Advanced Modeling, Analysis and Optimization of Thermal and Integrated Energy Systems presents groundbreaking research on the innovative "heat current method" for precise and efficient modelling of thermodynamic systems. The book offers a comprehensive exploration of integrated power-thermal systems, emphasizing holistic optimization strategies crucial for sustainable energy transitions. Authored by experts in the field, this book is a valuable resource for researchers and professionals seeking advanced methodologies in thermal engineering and energy system optimization. The book begins with an introduction that outlines the challenges faced by thermodynamic systems in the renewable energy transition. It progresses to explore the fundamentals of modelling and optimizing thermodynamic and integrated thermal-power systems, introducing the novel heat current method and its application. The subsequent chapters delve into the heat current method for thermodynamic system modelling, efficient simulation and optimization of thermodynamic systems, holistic modelling and analysis of integrated power-thermal systems, and coordinating flexibility and efficiency for renewable energy accommodation. Advanced Modeling, Analysis and Optimization of Thermal and Integrated Energy Systems offers valuable insights and practical solutions for a diverse audience of researchers, engineers, and energy professionals. Researchers and students working in thermal engineering, and sustainable energy will benefit from the novel methodologies and holistic approaches presented in this book. Engineers and professionals working in the energy sector, particularly those involved in system optimization and renewable energy integration, will find this book essential for advancing knowledge and best practices.