As the demand for energy increase the demand for non-conventional sources of energy such as sun, wind, tide, biogas etc…. is increasing. The particularities of these sources of energy are easily available, renewable, suitable for environment, less hazardous, free from pollution, need not much effort. The need of our electricity increases day by day. To depend solely upon conventional energy resources is not conventional energy resources is not a wise policy. In our country there are many possibilities for the development of non-convention energy sources.
Non-conventional energy resources are renewable, easily available, eco-friendly, pollution free. Solar energy, wind energy, tidal energy, bio gas, geo thermal energy is the various non-conventional energy resources.
Importance and advantages of nonconventional energy over conventional energy source
- Solar energy
There is much more scope for tapping solar energy. Solar energy is used in different part of the country. Sunlight can be directly converted to electricity through the photo voltaic technology. It is possible through this method from I sq. km area. Solar energy is most commonly used for following purpose for cooking, for generating electricity etc… advantages of solar energy is there is no expense for fuel, no environmental pollution, available in abundance and very rare accident causing.
- Wind energy
The energy from the wind is used to generate electricity. Blades fixed to a shaft rotate in the air. The kinetic energy acquired by the shaft makes is rotates and electricity is produced. 2000 megawatt electricity can be produced from wind mills in our country.
Bio gas contains 55% methane and 45% co2, bushes wastes from crops, human and animal wastes are used to produce the gas. Decaying plants material produces the gas methane. Bio gas can give higher temperature compared with kerosene and charcoal. It is also known as Gobar gas. Cow dung is largely used for producing Gobar gas.
- Tidal energy
It can be considered as the least expensive sources of energy. Once it is fully developed fuel cost is null. Tidal power can be classified into three generating methods:
Tidal stream generator
Tidal stream generators (or TSGs) make use of the kinetic energy of moving water to power turbines, in a similar way to wind turbines that use moving air.
Tidal barrages make use of the potential energy in the difference in height (or head) between high and low tides. Barrages are essentially dams across the full width of a tidal estuary.
Dynamic tidal power
Dynamic tidal power (or DTP) is a theoretical generation technology that would exploit an interaction between potential and kinetic energies in tidal flows. It proposes that very long dams (for example: 30–50 km length) be built from coasts straight out into the sea or ocean, without enclosing an area. Tidal phase differences are introduced across the dam, leading to a significant water-level differential in shallow coastal seas – featuring strong coast-parallel oscillating tidal currents such as found in the UK, China and Korea.
- Wave energy
Projects for producing electricity from waves have been established in many parts of the world. Waves are made to move into a trapped air column. As the waves rise in the sea outside the column, water inside the chamber also rises forcing a pocket. As the waves fall, air is sucked back in from the atmosphere causing the turbine to spin again. Thus electricity is produced.
- Geothermal energy
Geothermal energy is thermal energy generated and stored in the Earth. Thermal energy is energy that determines the temperature of matter. Earth’s geothermal energy originates from the original formation of the planet, from radioactive decay of minerals and from volcanic activity. The geothermal gradient, which is the difference in temperature between the core of the planet and its surface, drives a continuous conduction of thermal energy in the form of heat from the core to the surface.
Now a day’s energy crisis is becoming a great problem. Before these problems non-conventional energy source slant a major role to conserve energy. By making use of non-conventional energy sources across the world, we can generate hundreds of mw electricity.