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solar energy

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Uses of solar power

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solar energy

  1. 1. Solar Energy:Solar Energy: The Ultimate RenewableThe Ultimate Renewable ResourceResource Group MembersGroup Members M Humair KhanM Humair Khan M Asad YaseenM Asad YaseenWajahatWajahat KazmiKazmi
  2. 2. What is Solar Energy?What is Solar Energy?  Thermonuclear fusionThermonuclear fusion reactionsreactions  Represents the entireRepresents the entire electromagneticelectromagnetic
  3. 3. Advantages and DisadvantagesAdvantages and Disadvantages  AdvantagesAdvantages  DisadvantagesDisadvantages
  4. 4. How much solar energy?How much solar energy? The surface receives about 47% of the total solar energy that reaches the Earth.
  5. 5. Putting Solar Energy to Use: HeatingPutting Solar Energy to Use: Heating WaterWater  Two methods of heating waterTwo methods of heating water  Storage.Storage.
  6. 6. Heating Water: Active SystemHeating Water: Active System Active System uses antifreeze so that the liquid does not freeze if outside temp. drops below freezing.
  7. 7. Heating Water—Last ThoughtsHeating Water—Last Thoughts  Efficiency of solar heating system is always less than 100%Efficiency of solar heating system is always less than 100% because:because:  Solar water heating saves approx. 1000 megawatts of energy aSolar water heating saves approx. 1000 megawatts of energy a yearyear  By using solar water heating over gas water heaterBy using solar water heating over gas water heater
  8. 8. Heating Living SpacesHeating Living Spaces  Best design of a building:Best design of a building:  Efficient heating:Efficient heating:  Collection:Collection:  Storage:Storage:
  9. 9. Heating Living SpacesHeating Living Spaces Passive Solar Trombe Wall Passively heated home in Colorado
  10. 10. Heating Living SpacesHeating Living Spaces  A passively heated home uses about 60-75% of theA passively heated home uses about 60-75% of the solar energysolar energy  Reduce energy bills by 75%Reduce energy bills by 75%  Energy is used for water and space heating.Energy is used for water and space heating.  Major factor discouraging solar heating is lowMajor factor discouraging solar heating is low energy prices.energy prices.
  11. 11. Solar-Thermal Electricity:Solar-Thermal Electricity: Power TowersPower Towers  General idea is to collect the lightGeneral idea is to collect the light  Capital cost is greater than coal fired power plantCapital cost is greater than coal fired power plant  Way to reduce costWay to reduce cost
  12. 12. Power TowersPower Towers Power tower in Barstow, California.
  13. 13. Solar-Thermal Electricity:Solar-Thermal Electricity: Parabolic Dishes and TroughsParabolic Dishes and Troughs  The first SEGSThe first SEGS
  14. 14. Parabolic Dishes and TroughsParabolic Dishes and Troughs Because they work best under direct sunlight, parabolic dishes and troughs must be steered throughout the day in the direction of the sun. Collectors in southern CA.
  15. 15. Direct Conversion into ElectricityDirect Conversion into Electricity  By photovoltaic cells.By photovoltaic cells.  Battery needed as storageBattery needed as storage  No moving partsNo moving parts
  16. 16. Solar Panels in UseSolar Panels in Use
  17. 17. Efficiency and DisadvantagesEfficiency and Disadvantages  EfficiencyEfficiency  DisadvantagesDisadvantages
  18. 18. Final ThoughtFinal Thought  GoalGoal  RiskRisk  Pollution freePollution free
  19. 19. The EndThe End

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