HouseholdSolar Energy

Solar Energy Systems – An Introduction

India is endowed with abundant of solar radiation. The country receives solar radiation equivalent to more than 5,000 trillion kWh/year, which is far more than its total annual energy requirement. The radiation available could be utilized for thermal as well as for photo-voltaic applications. Solar thermal technologies have already found ready acceptance for a variety of decentralized applications in domestic, industrial and commercial sectors of the country. The most widely acceptable application is the solar water heating technology. However, solar steam generating and air heating technologies and energy-efficient solar buildings are also attracting attention in urban and industrial areas. Among solar photo-voltaic technologies, there are some devices/ systems such as solar lanterns, solar home systems, solar street lights, solar pumps, solar power packs, roof top SPV systems etc which could be useful both in rural and urban areas for the purpose of reducing burden on conventional fuels.
Solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photo-voltaic, solar thermal energy, solar architecture, molten salt power plants and artificial photosynthesis
It is an important source of renewable energy and its technologies are broadly characterized as either passive solar or active solar depending on how they capture and distribute solar energy or convert it into solar power. Active solar techniques include the use of photo-voltaic systems, concentrated solar power and solar water heating to harness the energy. Passive solar techniques include orienting a building to the Sun, selecting materials with favorable thermal mass or light-dispersing properties, and designing spaces that naturally circulate air.
The potential solar energy that could be used by humans differs from the amount of solar energy present near the surface of the planet because factors such as geography, time variation, cloud cover, and the land available to humans limit the amount of solar energy that we can acquire.
Geography affects solar energy potential because areas that are closer to the equator have a greater amount of solar radiation. However, the use of photo-voltaic that can follow the position of the sun can significantly increase the solar energy potential in areas that are farther from the equator. Time variation affects the potential of solar energy because during the nighttime there is little solar radiation on the surface of the Earth for solar panels to absorb. This limits the amount of energy that solar panels can absorb in one day. Cloud cover can affect the potential of solar panels because clouds block incoming light from the sun and reduce the light available for solar cells.

Note: The above right up collected from the reference websites & is a step towards to spread the awareness of solar system to be adopted by mass population. It’s an effort to maximum the use of renewable source of energy to save a better future.

Reference: http://mnre.gov.in & Wikipedia.

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