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Solar energy


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Solar energy

  1. 1. Solar energy Clearly a better solution! Done by Eddie Lim (21) Clement Chia(9) Kenneth Neoh (16) Koh Jing Yuan (17)
  2. 2. Agenda <ul><li>Introduction </li></ul><ul><li>What are solar panels? </li></ul><ul><li>Different types of solar panels. </li></ul><ul><li>What are solar panels made of? </li></ul><ul><li>How does solar panels work? </li></ul><ul><li>How are solar panels positioned? </li></ul><ul><li>Advantages of solar panels </li></ul><ul><li>Solar panels in HCI </li></ul><ul><li>Bibliography </li></ul>
  3. 3. What are solar panels <ul><li>A device that harvest and convert light to energy. </li></ul><ul><li>A panel of interconnected assembly of solar cells(PV cells) </li></ul><ul><li>Used to supply electricity in commercial and residential applications </li></ul>
  4. 4. What is Photovoltaic <ul><li>Photovoltaic is the conversion of solar energy to electricity </li></ul><ul><li>Photovoltaic does not generate heat </li></ul><ul><li>It is very reliable and requires very little maintanence </li></ul><ul><li>Generates no noise or pollution </li></ul>
  5. 5. Different types of solar panels <ul><li>Monocrystalline solar panels(Single crystal) </li></ul><ul><li>Most expensive type of solar panel </li></ul><ul><li>Return electricity rate of 14% to 18% </li></ul><ul><li>One continuous sheet of silicon with metal sheets nailed to it to increase conductivity. </li></ul><ul><li>More effective than other panels </li></ul><ul><li>Most worth it in the long run </li></ul>
  6. 6. Different types of solar panels <ul><li>Polycrystalline solar panels(Multi-Crystal) </li></ul><ul><li>Electricity return rate of 12% to 14% </li></ul><ul><li>Made up of many individual cells that have metal conducting materials nailed to the side to hold the cells together </li></ul><ul><li>Cheapest solar panel </li></ul><ul><li>Lower maintanence cost compared </li></ul><ul><li>to Monocrystalline solar panels. </li></ul>
  7. 7. Different type of solar panels <ul><li>String Ribbon Silicon solar panels </li></ul><ul><li>Electricity return rate of 12% to 14% </li></ul><ul><li>The PV cells in a string ribbon panel are made of strips of silicon attached to metal bars that connect the strips to form a cell </li></ul><ul><li>Production costs are slightly lower compared to Polycrystalline solar panels. </li></ul>
  8. 8. Different type of solar panels <ul><li>Amorphous solar panel </li></ul><ul><li>Lowest electricity return rate of 5% to 6% </li></ul><ul><li>These panels are not made of crystalline silicon </li></ul><ul><li>They are composed of a piece of semi-conductor material with a thin silicon film on the top. </li></ul><ul><li>Not worth it in the long run </li></ul>
  9. 9. What are solar panels made of? <ul><li>There are two protective layers on the semiconductor. </li></ul><ul><li>Solar panel are made of two materials sandwiched together called a semiconductor. </li></ul><ul><li>The top layer is negatively charged while the bottom is positively charged </li></ul>
  10. 10. What are solar panels made of?(2) <ul><li>Consists of million of atoms that produce positive and negative charges </li></ul><ul><li>Silicon produces the positive or negative charged stimuli </li></ul>
  11. 11. How does solar panels work? <ul><li>When sunlight reaches the solar panels, the electrons are knocked loose from the silicon </li></ul><ul><li>These electrons then move up from the bottom layer of silicon. </li></ul><ul><li>They then crowd the electrons on the top layer. </li></ul>
  12. 12. How does solar panels work?(2) <ul><li>The electrons at the top layer is then collected by external contacts on the surface of the top layer. </li></ul><ul><li>The electrons then provide power to the electrical system </li></ul>
  13. 13. How are solar panels positioned? <ul><li>The positioning of the panels is a major factor in deciding how much sunlight hits the panel </li></ul><ul><li>Most are stationary but some solar panels move accordingly when the sun moves. </li></ul><ul><li>In the southern hemisphere, solar panels are placed facing the north. </li></ul><ul><li>In the northern hemisphere, solar panels are place facing the south. </li></ul>
  14. 14. How are solar panels positioned?(2) <ul><li>In winter, the sun is lower compared to the position of the sun in other season, so tilt the panels accordingly. </li></ul><ul><li>In summer, the sun is higher compared to the position of the sun in other season. </li></ul>
  15. 15. Why should we use solar panels? <ul><li>The current energy source for most people is dependent on fossil fuels. </li></ul><ul><li>Fossil fuels is burnt to produce energy which causes pollution to the environment </li></ul><ul><li>Fossil fuels are also non-renewable so once it is used up, it will take million of years to be replenished. </li></ul>
  16. 16. Why should we use solar panels?(2) <ul><li>Our current energy source is running out and causes pollution to environment. </li></ul><ul><li>Solar panels do not need fossil fuels and neither does it cause pollution. </li></ul><ul><li>Solar panels are able to generate electricity as long as there is sun </li></ul>
  17. 17. Advantages of solar panels <ul><li>Pollution-free </li></ul><ul><li>The energy source(Sun) is completely renewable unlike the usage of fossil fuels for electricity. </li></ul><ul><li>Enables the harnessing of power in remote areas. </li></ul>
  18. 18. Advantages of solar panels(2) <ul><li>Solar panels can also be used to provide electricity to places where it might be difficult to construct power lines. </li></ul><ul><li>Requires very little maintenance </li></ul>
  19. 19. Solar panels in HCI <ul><li>Current 84 solar panels in HCI </li></ul><ul><li>It is estimated that 70 k WH of electricity is generated everyday. </li></ul><ul><li>Estimated savings of $7,200 per year </li></ul><ul><li>More environmentally friendly by reducing carbon emission by 8 tons </li></ul>
  20. 20. Bibliography <ul><li>&quot;WHAT ARE SOLAR PANELS?&quot;  WHAT ARE SOLAR PANELS? ., n.d. Web. 27 Sept. 2011. <>. </li></ul><ul><li>&quot;What Are Solar Panels Made Of?&quot;  Solar Power Is The Future . N.p., n.d. Web. 27 Sept. 2011. <>. </li></ul><ul><li>&quot;How Solar Panels Are Made.&quot;  Reuk . N.p., n.d. Web. 27 Sept. 2011. <>. </li></ul><ul><li>&quot;How Solar Panels Work.&quot;  Trusty Guides . N.p., n.d. Web. 27 Sept. 2011. <>. </li></ul>
  21. 21. <ul><li>&quot;Positioning Solar Panels.&quot;  Yourgreendreams . N.p., n.d. Web. 27 Sept. 2011. <>. </li></ul><ul><li>&quot;Advantages of Solar Power.&quot;  Clean Energy Ideas . N.p., n.d. Web. 27 Sept. 2011. <>. </li></ul><ul><li>&quot;Types of Solar Panels.&quot;  Solar Panels . N.p., n.d. Web. 27 Sept. 2011. <>. </li></ul>