Hydroelectricity

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Hydroelectricity

  1. 1. INTRODUCTION Hydroelectricity is a good source of green energy. It has been used as an environmental power source for years and is a good substitute of coal, oil and gas. Although there are some positive aspects of hydroelectricity. There are also negatives.
  2. 2. WHAT IS HYDROELECTRICITY ? • HYDROELECTRICITY IS THE TERM REFERRING TO ELECTRICITY GENERATED BY HYDROPOWER. • THE PRODUCTION OF ELECTRICAL POWER THROUGH THE USE OF THE GRAVITATIONAL FORCE OF FALLING OR FLOWING WATER. • IT IS THE MOST WIDELY USED FORM OF RENEWABLE ENERGY, ACCOUNTING FOR 16 PERCENT OF GLOBAL ELECTRICITY GENERATION.
  3. 3. HYDROELECTRIC POWER Is:
  4. 4. HYDROELECTRIC POWER Is: A form of energy. Renewable source of energy.
  5. 5. HYDROELECTRIC POWER Is: A form of energy. Renewable source of energy. Is not:
  6. 6. HYDROELECTRIC POWER Is: A form of energy. Renewable source of energy. Is not: A non renewable source of energy. A source of greenhouse gases.
  7. 7. WHAT IS RENEWABLE SOURCE OF ENERGY? It is:-
  8. 8. WHAT IS RENEWABLE SOURCE OF ENERGY? It is:- Energy that comes from resources which are continually replenished on a human timescale such as
  9. 9. WHAT IS RENEWABLE SOURCE OF ENERGY? It is:- Energy that comes from resources which are continually replenished on a human timescale such as  Sunlight  Wind  Rain
  10. 10. WHAT IS RENEWABLE SOURCE OF ENERGY? It is:- Energy that comes from resources which are continually replenished on a human timescale such as  Sunlight  Wind  Rain  Tides  Waves  Geothermal Heat
  11. 11. HOW TO GENERATE HYDROELECTRICITY? It can be generated by:-
  12. 12. HOW TO GENERATE HYDROELECTRICITY? It can be generated by:-  Conventional Dams  Pump storage
  13. 13. HOW TO GENERATE HYDROELECTRICITY? It can be generated by:-  Conventional Dams  Pump storage  Run of the river  Tide  Underground
  14. 14. DAMS 1. A dam is a barrier that impounds water or underground streams. 2. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees (also known as dikes) are used to manage or prevent water flow into specific land regions. 3. Hydropower and pumped-storage hydroelectricity are often used in conjunction with dams to generate electricity. 4. A dam can also be used to collect water or for storage of water which can be evenly distributed between locations.
  15. 15. How does hydroelectric dam works?
  16. 16. HISTORY OF HYDROELECTRIC POWER Hydropower has been used since ancient times to grind flour and perform other tasks. In the mid-1770s, French engineer Bernard Forest de Bélidor published Architecture Hydraulique which described verticaland horizontal-axis hydraulic machines. By the late 19th century, the electrical generator was developed and could now be coupled with hydraulics. In 1878 the world's first hydroelectric power scheme was developed at Cragside in Northumberland, England by William George Armstrong
  17. 17. ADVANTAGES OF HYDROELECTRIC POWER
  18. 18. ADVANTAGES OF HYDROELECTRIC POWER  High quality energy output compared with low quality energy output.  Creates water reserves as well as energy supplies.  Reservoirs used for recreation, amenity.  Good safety record.
  19. 19. DISADVANTAGES OF HYDROELECTRIC POWER
  20. 20. DISADVANTAGES OF HYDROELECTRIC POWER  They are costly to build.  Can cause the flooding of surrounding communities and landscapes.  Dams have major ecological impacts on local hydrology.  Silting of dams.  Downstream lack of water (e.g. Nile) and risk of flooding if dam bursts.
  21. 21. Three Gorges dam in China is the largest hydroelectric power station in the world.
  22. 22. The Itaipu dam in the Brazil is the second largest hydroelectric power station in the world.
  23. 23. Resources From
  24. 24. THE END

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