04-02-2013, 04:38 PM
APPLICATION OF SOLAR ENERGY
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INTRODUCTION
The sun is a star. It is the largest object in our solar system and one of the larger stars in our galaxy. The source of energy in the Sun is at its core where hydrogen is converted to helium in a thermonuclear reaction. This energy travels from the core to the surface of the Sun and is released into space primarily as light. The energy that comes to the Earth is in 2 main forms, heat and light.
SOLAR ENERGY TO ELECTRICAL ENERGY
Solar cells are devices which convert solar light energy directly into electricity and function by the photovoltaic effect. Photo- means light and voltaic means electrical current or electricity (light-electricity). A solar cell provides direct current (DC) electricity that can be used to light bulbs among other things. The majority of modules use wafer-based crystalline silicon cells or thin-film cells based on cadmium telluride or silicon. The conducting wires that take the current off the panels may contain silver, copper or other non-magnetic conductive transition metals Solar cells can even be used to charge rechargeable batteries so that electricity can be stored for later use when the sun is not available. The fully charged batteries are portable energy that can be used whenever and wherever they are needed.
EXAMPLES OF IMPORTANT APPLICATION IN ODISHA
• At Kalijai (located at the centre of Chilika lake) where supply of Electricity by overhead wire or undersea cable not feasible, Govt. of India under its solar energy development scheme electrified Kalijai by use of the solar energy technique.
• The electrification at Ramchandi (the famous temple midway between Konark-Puri) has also been done in the similar technique as that of at Kalijai.
How it works:
Light energy hits the solar panel and is transformed into DC electrical energy. The electrical energy passes through the wires to the battery. The resistor keeps the electrical energy in the wires from flowing too fast. The diode works like a safety valve and keeps the electrical energy from flowing out of the battery and back to the solar panel when there is no light.
CONCLUSION:
Solar Energy is completely pollution free as well as low cost energy project compare to Thermal, Nuclear & Hydro energy project.
In comparison to other renewable energy, it has its own merit because this energy can even be harvested in all places like each house, remote villages. Govt. of India should put extreme focus and take consider it as a thrust area to promote this sector in all village/urban areas.