... Nitrogen Systems .......................................................... 317 Gas Systems .............................................................................. 320 Electrical Systems ... systems and operations • Heat exchanger and cooling tower systems and operations • Steam generation and furnace systems and operations • Reactor systems and operations • Key concepts and learning features ... vessels • Pumps, compressors, and simple systems • Turbines and motors • Heat exchangers, cooling towers, and simple systems • Steam generation, fired heaters, and systems • Process symbols, diagrams,...