Unit c - section 3.1 --thermal energy


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Thermal Energy Notes

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Unit c - section 3.1 --thermal energy

  1. 1. Mr. Ilko’s Notes
  2. 2. Thermal Energy in OurWorld There are several types of Thermal Energy examples in our World; Some Examples;  Solar  Geothermal  Fires  Decay
  3. 3. Solar
  4. 4. Solar Energy from the sun that hits the Earth and provides all our energy
  5. 5. Geothermal http://www.youtube.com/watch?v=rfUQy86ZMpQ
  6. 6. Geothermal Considerable source of energy from the Earth Much of it is still contained inside the Earth “Geo” means Earth and “Thermal” means heat
  7. 7. Fires
  8. 8. Fires All fires consume fuel (wood, oil, natural gas) Fire converts the chemical energy stored inside the fuel into;  Thermal energy  Light energy  Sound energy
  9. 9. Decay
  10. 10. Decay Is a source of thermal energy that usually goes un-noticed The breakdown of dead plants and animals releases thermal energy If you have composting you can feel the heat produced by the decaying process
  11. 11. Solar Energy Solar energy is our most common form of thermal energy The sun provides the energy for life of the whole planet  Every 40 minutes, the level of energy that hits the Earth equals the whole energy level of humans for a full year.
  12. 12. Using the Sun We are able to use the sun’s energy to create heat and warmth for us There are two primary types of solar heating;  Active  Passive
  13. 13. Passive Solar Heating The basic approach is simple;  Reduce heat loss and increase heat gain from the sun This system requires that insulation plays a vital role in maintaining of heat levels This also requires convection and radiation to work
  14. 14. Passive Solar Heating Process;  Radiant Energy comes in through the windows around the house  This energy is added to the energy currently in the room  Heat travels to the other rooms through convection currents
  15. 15. Active Solar Energy This type of heating usually has three components;  A collector  A heat storage Unit  A heat distribution system
  16. 16. The Process Water is used to trap solar energy. Copper tubing under a black surface is placed under glass panels Sun rays hit the glass and the area is heated The water running through the copper tubes is heated and pumped to the distribution and storage units.
  17. 17. Solar Energy and Electricity In addition to providing heat, solar energy can also be converted into electricity. Solar Cells are arranged in panels and which are connected to form a solar array These arrays are positioned to capture the suns energy and store in low voltage batteries
  18. 18. Cost/Benefits of SolarEnergy Is a reusable form of energy Does not create pollution, or radiation risks like nuclear powerCOSTS Cannot create enough energy is some areas of the world where sun light can be limited Expensive to install