Concept of Renewable Energy
Renewable energy sources also called non-conventional energy, are sources that are continuously replenished by natural processes. For example, solar energy, wind energy, bio-energy -bio-fuels grown sustain ably), hydropower etc., are some of the examples of renewable energy sources.A renewable energy system converts the energy found in sunlight, wind, falling-water, seawaves, geothermal heat, or biomass into a form, we can use such as heat or electricity. Most of the renewable energy comes either directly or indirectly from sun and wind and can never be exhausted, and therefore they are called renewable.
However, most of the world's energy sources are derived from conventional sources-fossil fuels such as coal, oil, and natural gases. These fuels are often termed non-renewable energy sources. Although, the available quantity of these fuels are extremely large, they are nevertheless finite and so will in principle 'run out' at some time in the future Renewable energy sources are essentially flows of energy, whereas the fossil and nuclear
fuels are, in essence, stocks of energy.Various forms of renewable energy
- Solar energy
- Wind energy
- Bio energy
- Hydro energy
- Geothermal energy
- Wave and tidal energy
