Energy engineering is a multidisciplinary field which merges knowledge from the fields of mathematics, chemistry and physics with environmental and economic engineering practices. There are various aspects which are dealt with under this discipline such as energy efficiency, energy services, plant engineering and alternative energy technologies. The main focus of energy engineering is to develop the most efficient and sustainable methods to operate buildings and manufacturing processes. This is generally accomplished by observing the use of energy and then suggesting approaches to improve the efficiency. Power engineering is a sub-discipline of energy engineering where mathematics and physics are applied to the movement and transfer of energy to work within a system. The topics included in this book on energy engineering are of utmost significance and bound to provide incredible insights to readers. It is appropriate for students seeking detailed information in this area as well as for experts.