Book excerpt: This book illustrates the basic concepts of phenomenological thermodynamics and how to move from theory to practice by considering problems in the fields of thermodynamics and energy-systems analysis. Many subjects are handled from an energetics or exergetics angle: calorimeters, evaporators, condensers, flow meters, sub or supersonic nozzles, ejectors, compressors, pumps, turbines, combustion processes, heaters, smoke stacks, cooling towers, motors, turbo-reactors, heat pumps, air conditioning, thermo-electrical generators, energy storage, and more.