Today when the energy sources have started depleting and fossil fuels have deployed the life devastating effects, another Green Energy source, which was evident to the entire universe, has come into our consciousness. That is the Obtaining energy from the Sun. The energy obtained from the Sun is Solar Energy. Let us see how this energy originates, develops, is being transferred, and deployed to sustain life of earth. The Sun works on two principals, number one is Fission (breaking up of single atom into two new ones) and second is fusion (combining of two different atoms in to one new atom) of atoms. In this process, the enormous amount of energy release and that energy is in visible form is light and invisible forms are ultraviolet and infrared radiations. This light is Solar Energy when converted to drive the life on earth. Like the plants, absorb Solar Energy to generate the energy by a process Photosynthesis, in which they break up the CO2 into Carbon (C)and Oxygen (O).
The carbon develops the plant body structure and oxygen released in the environment and ecosystem. The human body to generate the essential Vitamin D also absorbs the Solar Energy. The electricity is also generated though Solar Energy by administering the devises using the principle of photovoltaic effects.Another form of Solar Energy is heat supplied inform of infrared radiation by the Sun. The metallic heat conductors absorb the heat through infrared radiation and heat the water. The result is production of steam that is supplied to the steam turbines to drive the generators which, produces the electricity. Thus, Solar Energy has many applications through conventional and modern methods of energy production. Lets us look at the vast Solar Energy working area.The Solar Energy has many broad applications that are classified in following categories.
1. Active Solar Power and Passive Solar Power
2. Direct Solar Power and Indirect Solar Power
3. Concentrating Solar Power
(i) Line Focus
(ii) Point Focus
4. Non-Concentrating Solar Power
The Active Solar Power comprises of the technology that uses modern instruments electrical or mechanical to harness the power of Solar Energy. The Photovoltaic cells the, pumps, fans, etc. The Passive Solar Power technology In Solar Energy uses the non-mechanical methods i.e. static processes and methods. Like to heat up a room you need to build a room facing maximum times either the Sun or you can heat up the air and can let it heat up room naturally. The indirect methods of using Solar Energy, involve the methods in which there are multiple processes before the result is out. Examples are Photosynthesis, development of fossil fuels, central heating systems using alternative liquid to heat up the domestic water supplies, Wind Power used by wind turbines etc.
In Direct Solar Power applications comes the photovoltaic cells , Solar cookers to prepare food, Solar water heaters , Solar Energy Mills( conceptual idea of light hitting a pane and it rotates as a result of mechanical energy imparted by Sunlight), Solar Sails for space crafts etc. Concentrating Solar Power methods uses the geometry in reflecting the Solar Energy through lenses and mirrors. The parabolic and hyperbolic mirrors and the lenses are used to focus the light rays in one point or along one line. The heated up points or lines are the metallic chambers filled with liquid which transfers the heat to the secondary liquid generally water to generate electricity by Steam- Turbine electricity generator. Non-concentrating are plane Solar Energy absorbers, like a panel of Photovoltaic cells or a large surface area of forest or the Solar Ponds which traps heat energy in the salt layers in depths.
There are many advantages of Solar Energy as well as disadvantages also. There is enough of Solar Energy (about more than 100 times of what we humans use today) and it can be effective used without harming our environment. Solar Energy Generating stations are comparatively low at operating costs and maintenance. The technical advantages of Solar Energy are very promising as the transfer of electricity during peak hours is easily maintained when grid system is in use. The power density (amount of power in watts per square meter) of Solar Energy among renewable energies is quiet high (170W/m2). Disadvantages ofSolar Energy are it is available when sun shines i.e. no availability in rainy season, high costs of initial setups, technological barriers; Solar Energy storage of significance is not available , direct transportability is not available and the conversion of Solar Energy based electricity conversion losses ( from DC to AC) for grid based transmission.(For more you can visit)