This book provides business models and engineering design frameworks for the implementation of energy conservation in infrastructures such as buildings, hotels, public facilities, industrial facilities, transportation, and water/energy supply systems. The authors model key performance indicators that are used to evaluate energy conservation strategies and energy supply scenarios as part of the design and operation of energy systems in infrastructures. The book’s system approach shows effective management of building energy knowledge, which supports the simulation, evaluation, and optimization of several building energy conservation scenarios. The book offers new methods of developing energy semantic network (ESN) superstructures, energy conservation optimization techniques, and risk-based life cycle assessments. Case studies are used to illustrate the proposed energy conservation framework, practices, methods, engineering designs, control, and technologies.