Energy engineering is a new and rapidly growing field of engineering. It is concerned with facility management, alternative energy technologies, energy services, environmental compliance, energy efficiency, etc. It uses the elements of chemistry, environmental engineering, maths, physics, and economic engineering to work efficiently. Power engineering is that branch of energy engineering, which deals with transmission, utilization, generation and distribution of electric power and devices like transformers, generators and motors, etc. This book is designed to provide students with the topics which are of utmost significance. It picks up individual branches and explains their need and contribution in the context of the growth of this subject. Coherent flow of topics, student-friendly language and extensive use of examples make this textbook an invaluable source of knowledge.