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Energy system can refer to: 1  Electric power system, for supply, transmission and consumption of electric power. 2  Thermodynamic system, a physics concept for analysis of thermal energy exchange. 3  Bioenergetic systems, metabolic processes for converting energy in living organisms.
In addition to heat (thermal energy) and light(radiant energy), there is also electrical energy, chemical energy, and physical (kinetic)energy. All energy derives ultimately from the sun, and it is transferred through manyprocesses. The sun, for example, heats up the atmosphere to create wind and drive thewater cycle.