Responding to concerns about global warming, carbon dioxide emissions, and the political instability that threatens the US supply, this book enables management, system analysts, and performance engineers to develop and apply an operating strategy for the on-line optimization and control of energy systems in industrial plants. It provides proven techniques for analysis that can guide equipment selection and flowsheet adjustments to reduce plant energy consumption without affecting the productive capacity of the plant. Originating in the 1970s and 1980s when high energy costs and the OPEC crises fostered energy conservation, these techniques have been applied successfully in many industries in the United States, as well as in several industrialized countries in the Middle and Far East.