The book “Thermal Engineering” serves as a comprehensive guide for students, educators, and professionals in the field of thermal engineering. Authored by experts like Dr. J. M. Babu, Mr. K. Sabareeshwaran, Dr. R. Prabu, and Mr. D. Sakthivel, it emphasizes the foundational principles of thermodynamics, heat transfer, and fluid mechanics, while also integrating practical applications and advanced topics. The book covers a wide range of thermal engineering aspects, including the design and analysis of steam generators, turbines, internal combustion engines, and air compressors. Structured systematically, the book begins with the basics, such as steam generators and their classifications, moving towards intricate details like performance testing, boiler efficiency, and advanced technologies like high-pressure boilers and superheaters. It incorporates the latest advancements in renewable energy, sustainability, and energy-efficient systems, making it highly relevant for addressing current industrial challenges, including energy conservation and environmental sustainability. Chapters feature detailed explanations, illustrations, problem-solving exercises, and real-world case studies, ensuring that readers at all levels can grasp and apply the concepts effectively. Topics like boiler mounting and accessories, combustion dynamics, and heat balance are discussed in depth to provide insights into operational efficiency and optimization. This book stands out for its dual focus on theoretical rigor and practical application, making it a valuable resource for academic and professional development. It also serves as a reference for modern practices in thermal engineering, helping engineers design systems that meet contemporary efficiency and environmental standards. Whether for academic purposes or practical industry insights, “Thermal Engineering” equips readers with the knowledge to excel in a rapidly evolving discipline.