ABSTRACT
Chapter 3 presents the energy, different forms of stored energy, and the first law of thermodynamics also known as the principle of conservation of energy. It distinguishes between heat and work and different forms of work. It also presents various mechanical forms of work such as spring work, shaft work, pdV work, paddle-wheel work, and other non-mechanical forms of work. It covers the energy analysis of closed systems, first law for a closed system undergoing a cycle, and first law for a closed system undergoing a change of state. Also presented are energy conversion efficiency and energy-efficient buildings, motors, and compressors. In addition, the chapter also covers the importance of energy sustainability, energy security, and energy conservation.
