This book is unique in its contents covering a wide range of applied energy options and environmental topics like heat exchangers, thermodynamic cycles, solar thermal applications, biomass energy and biomass to value added products, atmospheric water generation, smoke-free biomass combustion, solar desalination, air pollution related issues and phase change materials. It has been classified in the form of eighteen chapters covering a wide range of applied energy applications and related issues. The book is systematically presented for the sake of convenience to the readers and is of special interest to young researchers working in applied energy systems and relevant issues. As contemporary science and energy research has played an important role in scientific innovation and development all over the globe, it is therefore, expected that this book would be useful for the young researcher, design engineers, and policy maker for visualizing the activities related applied energy systems