Solar Energy Introduction Renewable Energy

What is Solar Energy?

By confining the heat and light from the Sun, the energy generated is known as Solar Energy. To utilize the abundant resource, a variety of ways is provided by the technology. As the solar energy does not emit any greenhouse gases, it is considered as green technology. Solar energy is used in many forms and it is widely used in the form of electricity and heat source.

Solar Energy

The solar technology is mainly of two types -

  • Active Solar – In order to harness the energy, solar water heating is used, solar power is concentrated and photovoltaic systems are used which are considered as some of the techniques of Active Solar. Some of the activities like drying clothes and air warming directly consume Active solar.
  • Passive Solar – The building orientation to sun, material selection out of the favourable thermal mass or properties of light-dispersing, and by naturally circulating the air, spaces are designed by using Passive solar.

How to converse Solar Energy?

By confining the heat and light from the Sun, the energy generated is known as Solar Energy. Photovoltaic method with the help of semiconductor, generates electricity from sunlight.

On the other hand, thermal technologies can be used for extracting solar energy, which resolve two different methods for energy tapping. They are -

  • The solar energy is concentrated for deriving the thermal turbines which is known as solar concentration.
  • The other method is usage of heating and cooling method that is used in solar water heating and air conditioning.

The process by which electricity is extracted from solar energy is as follows:

  • The sun rays include the energy carrying particles, known as photons, which are absorbed.
  • Inside the solar cells, Photovoltaic conversion is carried out.
  • Different cells combine together to generate current. It is considered that a single cell carries a voltage of less than 0.5 V.
  • The resultant DC is converted to AC.

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