An overview of renewable energy sources, including the wind, wave, hydro, tidal, solar-thermal, geothermal and biomass-thermal, which utilize electric machines for electricity generation is presented; whereas the solar electric (photo voltaic) and thermoelectric power generations which directly produce electricity without using electric machines will not be discussed. Basically, these renewable energy sources can be categorized by their forms of energy storage before producing electricity by electric machines: namely, the wind, wave, run-of-river hydro and tidal stream are stored as kinetic energy; the large hydro and tidal barrage are stored as potential energy; the solar, thermal, geothermal and biomass-thermal are stored as heat energy.
The types of electric machines are generally based on these forms of energy storage.
Saturday, March 15, 2014
OVERVIEW OF RENEWABLE ENERGY
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