Energy is an important input for development. It aims at human welfare covering household, agricultural transport & industrial complexes. Due to population explosion the demand for various forms of energy has got increased many folds. Renewable Resources can be generated continuously in nature & are inexhaustible. These resources can be used again & again in an endless manner.
RENEWABLE TECHNOLOGIESWIND POWER
- WIND POWER :
Wind is an emissions-free source of energy. It is harnessed by making use of wind mills. Number of wind mills are installed in cluster are called wind farms. Minimum wind speed required is 150km/hr. A windmill converts wind energy into rotational energy by means of its blades. The basic principle of every windmill is to convert kinetic energy of wind into mechanical energy which is used to rotate the turbine of electrical generator to produce electricity.
Hydropower or hydroelectricity refers to the conversion of energy from flowing water into electricity. Modern hydro turbines can convert as much as 90% of the available energy into electricity. Hydroelectric power generates about 10% of the nation’s energy. Hydropower is fueled by water, so it’s a clean fuel source, meaning it won’t pollute the air like power plants that burn fossil fuels, such as coal or natural gas.
3. TIDAL ENERGY
It is harnessed from the tides produced in the ocean. The turbine and generator converts the movement of water coming from change in tide, the kinetic energy, into electricity. Tidal Energy has an expensive initial cost which may be one of the reasons tidal energy is not a popular source of renewable energy.
4. SOLAR ENERGY
Solar energy as energy obtained from the sun. Solar energy is the cleanest and most abundant renewable energy source. It can be used in many appliances like Solar heat collectors, Solar cells, Solar cookers, Solar water heaters Solar power plant, Solar furnace.