1. Hydroelectric power Yul van der Stap

2. What is…  Hydroelectric power  power generated through the energy of flowing water

3. History

4.  Fox river in Appelton, Wisconsin

5. History

6. Dam

7. Energy transformation

8. Formula  PE=pghV  P=ηρghQ  For 1m^3/sec from head of 1m, P=9 kW, if η 90%

9. Advantages & disadvantages Dam  +  Constant rate of electricity production  Long durability  Lake can be used as  irrigation purpose  Leisure area  -  High cost of construction  Destruction of environment  Alter of natural water table level.

10. Run of river

11. Energy transformation

12. Formula  Pmax =½ηρQv 2  Q=Av  Pmax =1/2ηρAv 3  if 1m 3 of water flows 1ms -1 with 100% efficiency, P=0.5kW

13. Advantages & disadvantages Run of River  +  Avoids the need to build large dams to store water  projects will operate anywhere between 65% to 90% of the time in any given year  Low potential risk of water quality  Has minimal impact on environment  -  Low production rate  Low availability

14. Tidal flows

15. Transformation  KE (water)  KE (turbine)  Electricity (generator)

16. Formula  Pmax =1/2ηρAv 3  if 1m 3 of water flows 1ms -1 with 100% efficiency, P=0.4kW

17. Advantages & disadvantages tidal flow  +  Can harness until sun and moon exist  Efficiency of 80%  Predictability  Protection of coastal area  -  High construction cost  Effective only 10hrs /day  Environmental damage

18. The end  http://www.technologystudent.com/energy1/hydr2.htm http://www.technologystudent.com/energy1/hydr2.htm  http://www.mpoweruk.com/hydro_power.htm http://www.mpoweruk.com/hydro_power.htm  http://greenliving.nationalgeographic.com/history-hydroelectric- power-20128.html http://greenliving.nationalgeographic.com/history-hydroelectric- power-20128.html  http://www.window.state.tx.us/specialrpt/energy/renewable/ http://www.window.state.tx.us/specialrpt/energy/renewable/  http://teeic.anl.gov/er/lhhydro/restech/desc/index.cfm http://teeic.anl.gov/er/lhhydro/restech/desc/index.cfm  http://www.runofriverpower.com/media/documents/CEBC_FS- RunOfRiver_WEB354.pdf http://www.runofriverpower.com/media/documents/CEBC_FS- RunOfRiver_WEB354.pdf  http://hydroearth.blogspot.kr/2012/10/tidal-power-advantages- and-disadvantages.html http://hydroearth.blogspot.kr/2012/10/tidal-power-advantages- and-disadvantages.html  http://www.youtube.com/watch?v=qRUl1mJQHmc&list=PLC73D6D 66C6F9D747 http://www.youtube.com/watch?v=qRUl1mJQHmc&list=PLC73D6D 66C6F9D747  http://www.pembina.org/re/sources/hydro-power http://www.pembina.org/re/sources/hydro-power  http://www.youtube.com/watch?v=rnPEtwQtmGQ http://www.youtube.com/watch?v=rnPEtwQtmGQ