Thermal engineering is a branch of engineering that deals with the study of heat transfer and the conversion of heat energy into mechanical work. It encompasses a wide range of topics including thermodynamics, heat transfer, fluid mechanics, and energy conversion systems. Thermal engineers design and analyze systems such as power plants, heating and cooling systems, and refrigeration systems to ensure efficient use of energy and optimal performance. They also work on developing materials and technologies for thermal insulation and heat exchangers to improve overall system efficiency. Thermal engineering plays a crucial role in various industries including automotive, aerospace, and manufacturing.