The accompanying Thermoptim™ portal (http://thermoptim.org) presents the software and manuals (in English and French) to solve over 200 examples, and programming and design tools for exercises of all levels of complexity. The portal explains to the user how to build appropriate models to bridge the technological reality with the theoretical basis of energy engineering. Offering quick overviews through e-learning modules moreover, the portal is user-friendly and enables users to quickly improve their proficiency. Students can freely download the Thermoptim modeling software demo version (available in seven languages), and extended options are available to lecturers. A professional edition is also available and has been adopted by many companies and research institutes worldwide (www.s4e2.com). This volume is intended as a textbook for courses in applied thermodynamics, energy systems, energy conversion and thermal engineering taken by senior undergraduate and graduate-level students in mechanical, energy, chemical and petroleum engineering. Students should already have taken a first-year course in thermodynamics. The refreshing approach and exceptionally rich coverage make it a great reference tool for researchers and professionals as well.