A general principle applicable to all physical systems in which mass is neither created nor destroyed is the law of conservation of energy, which states that energy is neither created nor destroyed; it is merely changed in form. This principle, together with the laws of electric and magnetic fields, thermodynamics, electric and hydraulic circuits, and Newtonian mechanics, is a convenient means for finding the characteristic relationships of electromechanical energy coupling. Energy required to operate building systems can be stored in thermal storage, electrochemical, passive electric elements, and coupling fields.
KeywordsFuel Cell Heat Storage Storage Medium Thermal Storage Building System
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