Renewable energies


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Renewable energies

  1. 1. What is energy?Energy is all that can be turned into heat at a low temperature. “Energy” comes from the ancient Greek “enérgheia”, whose meaning is effective action.
  2. 2. What is energy saving and in what ways can it be achieved?• It’s the saving of exhaustible energy sources.• You can reach it by using renewable energy sources such as the sun, the wind, the Earth heat.
  3. 3. What are the reasons that led to the use of renewable energy sources?• They are instrumental in developing an alternative energy system.• They contribute to the preservation of territory.
  4. 4. How is nuclear energy produced? Nuclear energy is produced from atomic nucleus by:• The fusion of light nucleuses.• The fission of a heavy nucleus.
  5. 5. What problems can be caused by nuclear energy?The nuclear plants :• Release enormous quantities of heat.• Produce radioactive waste. Uranium , which is used in nuclear fission, is not an inexhaustible energy source.
  6. 6. What is a photovoltaic panel? A photovoltaic installation turnssolar energy directly into electricity.
  7. 7. What are the advantages of installing a photovoltaic system?• Allows to break down the cost for electricity.• Assures an income to the Electricity Network Manager.• Allows to have public contributions for the starting cost.
  8. 8. Does the system still produce energy during the periods in which there is less sunlight?• The system allows a better performance when the sun temperature is at about 25 degrees Celsius.• From November to February the solar panels produce a lower energy quantity.
  9. 9. Is it possible to install a photovoltaic module in a public school? Yes and the prerequisites are:• Space availability to install the “modules”.• Conditions for a correct exposure of modules. Absence of barriers to the radiation. In 2007 Liceo Marconi from Carrara introduced the use of a photovoltaic installation.
  10. 10. What is district heating? It’s the distribution of hot water or vapour to the houses by means of insulated underground pipes.
  11. 11. What is wind energy?• It’s the kinetic energy coming from the wind and it changes according to its speed.• The wind is conditioned by the landscape so it’s possible to locate wind installations only in some areas.
  12. 12. What are the advantages of district heating? • Lower environmental impact. Energy saving. Simplicity of use . Safety from explosion or poisoning dangers. • Saving on maintenance costs and reparations. Rationalization in accounting. Time and temperature control system.
  13. 13. What is hydroelectricity? It’s the energy source which uses the conversion of the gravitational potential energy originated by water bodies in high altitude into kinetic energy.
  14. 14. What is geothermal energy? It is the energy produced by underground heat, coming to the surface by water-bearing strata, or water artificially injected in the subsoil.
  15. 15. 800700600500 Eolico Solare400 Idroelettrica Biomasse Geotermica300200100 0 RENEWABLE ENERGIES PRODUCED IN Mw
  16. 16. • Ferdani Matteo• Marrazzini Gioia• Panesi Eleonora• Simonelli Tommaso• Vannucci Iacopo