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Solar energy


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Solar energy

  1. 1. Author: Violetta SurgutovaForm 8.a
  2. 2. Solar cell is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect.
  3. 3. Solar panels are made up of a set of solar cells, that directly convert solar energy into electricity.
  4. 4. Here is an image which will help you understand some basic terminology better.
  5. 5.  My family mostly spends income on electricity and so I am interested in alternative energy sources
  6. 6.  A year my family spends 2500 kW of energy. According to the calculations 3 kW solar system panel produces 2850kW a year.
  7. 7.  To ensure this we must buy 12 panels that cover an area of 20 square meters. We would spend 4000Ls (5700 euros)
  8. 8. Solar cells are often found :
  9. 9. Solar cells The solar cell creation for the first time is credited to Charles Fritts, who used junctions that were created when the semiconductor was coated by a very thin layer of gold.
  10. 10.  Flat SC:
  11. 11. Solar cells in LatviaLatvian solar panels can be used in places where there is no connection to the power grid - a farm or a summer home.
  12. 12. Solar battery proved themselves in space as stable source of energy that can run for a very long time.
  13. 13. I would like to have a solar cell in my village. I have a private house,so I could make the roof of them. I would save a lot of electrical energy and a lot of money.It would look like this
  14. 14. The experts say that the panels should beplaced on the roofs of buildings in the :•southern,• western,•eastern side.
  15. 15.  Solar panels are tested in the field for many installations. Practice has shown that the service life of solar panels over 20 years.
  16. 16.  Solar panels can be placed on any roof They do not harm the nature It is possible to store electricity in batteries This energy is inexpensive It reduces the cost of electricity bills.
  17. 17. To understand this, we should know that light is composed of a number of small energy- containing particles – photons.
  18. 18.  Solar panels consist of several cells, which are made of silicon.
  19. 19.  When light photons are absorbed in the cell, the energy of the electrons released.
  20. 20.  Next, the electrons pass through the cells of the adverse party, and leave further to the attached driver. This flow of electrons is called electricity.
  21. 21.  Young people who participate in the race Latvian "Solar Cup", manufactured car models with solar panels, which contribute to students understanding of the fact that solar energy can and should be used.
  22. 22. Solar cells will be used a lot more in the future than now. The solar panels will be constructed for boats, motorcycles and even an entire city will be formed on solar cellsThey will look like this :
  23. 23.  Solar energy is also available in Latvia! Sun will never appears on the bill of energy consumption.
  24. 24.  Short-term thinking and making decisions according to the slogan " lower costtoday is better than benefits in the future ". At present, we are very slowly mooving towars «sunny» future energy In Latvia
  25. 25.  Lack of research & development & production phase