It provides a basic understanding of hydropower plant which use water to generate electricity. Moreover, it describes about its advantages and disadvantages.
2. 2
1. Introduction
2. History
3. Global Potential
4. How does it work
5. Technology and Application
6. Capacity and Generation
7. Principle Components
8. Seize and Capacity
9. Advantages and Disadvantages
10. Conclusion
11. Future of hydropower
12. Case study: Kamchay
Hydropower
13. References
Content
5. 5
2. History
• The Greeks used water wheels
for grinding wheat into flour
more than 2,000 years ago.
• Besides grinding flour, the
power of the water was used
to saw wood and power textile
mills.
6. 6
2. History
• French hydraulic and military
engineer, Bernard Forest de Bélidor
in the mid-1700s.
• He wrote Architecture Hydraulique
which described vertical- and
horizontal-axis hydraulic machines.
• In the early 1800’s, American and
European factories made use of the
water wheel to run machines.
• In the late 1800’s, hydropower was
first used to generate electricity
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• Water from the reservoir flows due to gravity to drive
the turbine.
• Turbine is connected to a generator.
• Power generated is transmitted over power lines.
4. How does it work(cont.)
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5.1. Diversion Hydro Power
• Run-of-the-river hydroelectric stations are those with small
or no reservoir capacity.
•water coming from upstream must be used for generation
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•The most common type of hydroelectric power plant
•It is a large hydropower system, that uses a dam to store
river water in a reservoir
5.2. Storage Hydro Power
12. 12
•Pumped storage is a method of keeping water in
reserve for peak period power demands.
.
5.3. Pumped storage Hydro Power
13. 13
Reservoir acts much like a battery, storing power in
the form of water when demands are low and
producing maximum power during daily and seasonal
peak periods.
5.3. Pumped storage Hydro Power
14. 14
6. Capacity and Generation
•The total electricity generated by hydropower in 2009
reached 3 329 TWh, 16.5% of global electricity production.
•85%of renewable energy and provided more than one
billion people with power.
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6. Capacity and Generation
Name Country Year
Max
Generation
Annual
Production
Three Gorges China 2009 18,200 MW
Itaipú Brazil/Paraguay 1983 12,600 MW 93.4 TW-hrs
Guri Venezuela 1986 10,200 MW 46 TW-hrs
Grand Coulee United States 1942/80 6,809 MW 22.6 TW-hrs
Sayano Shushenskaya Russia 1983 6,400 MW
Robert-Bourassa Canada 1981 5,616 MW
Churchill Falls Canada 1971 5,429 MW 35 TW-hrs
Iron Gates Romania/Serbia 1970 2,280 MW 11.3 TW-hrs
• The 8 largest dam in the world
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9. Advantages and Disadvantages
•What are the advantages and
disadvantages of hydro power
plant?
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9.1. Advantages
1. renewable and clean energy
2. cheap and reliable energy
3. Flood controller
4. Tourism
5. Transportation
6. Irrigation
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9.2. Disadvantages
1. High investment cost
2. Flood
3. Local people displacement
4. Barrier for fish, navigation, transportation
5. Failure risk
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10. Conclusion
Hydro power is an important part of the
world's electricity supply, providing reliable,
cost effective electricity, and is expected to
continue to do so in the future.
Hydro power has less negative environmental
impacts which are very different from those of
fossil fuel power plants.
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•Evaluating a new generation of large turbines
– Capable of balancing environmental, technical,
operational, and cost considerations
•Developing and demonstrating new tools
– to generate more electricity with less water and greater
environmental benefits
– tools to improve how available water is used within
hydropower units, plants, and river systems
•Studying the benefits, costs, and overall effectiveness of
environmental mitigation practices
11. Future of hydropower
33. 33
11. Future of hydropower
• Will role important electricity producer in Cambodia
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12. Case study
Kamchay hydro power
•The first Cambodia large
scale hydro power
•Began in 2007, finished 2011
•Invested by China
•Capacity 194 MW
•Height 100m
•Cost US$280 million
Hydroelectric power comes from water at work, water in motion. Most people do not think about the initial stages of hydroelectric power. The first step of hydropower is the powers the hydrologic cycle which in turns gives the earth its water.
In the hydrologic cycle, atmospheric water reaches the earth’s surface as precipitation. Some of the water evaporates, but most of the water is absorbed by the ground and becomes surface runoff. Water from rain and melting snow eventually reaches ponds, lakes, reservoirs, and oceans where evaporation is constantly occurring. This cycle is a never ending cycle and nature ensures that water is a renewable resource.
For more than a century, the technology for using falling water to create hydroelectricity has existed.
The evolution of the modern hydropower turbine began in the mid-1700s when a French hydraulic and military engineer, Bernard Forest de Bélidor wrote Architecture Hydraulique which described vertical- and horizontal-axis hydraulic machines.
In 1878 the world's first hydroelectric power scheme was developed at Cragside in Northumberland, England by William George Armstrong
Ancient Greek farmers have used water wheels to grind wheat into flour.
In the early 1800’s, American and European factories made use of the water wheel to run machines.
In the late 19th century, hydropower was used for generating electricity.
Waterwheels and mills were used for irrigation and mining.
In the 1830’s, hydropower provided the energy for transportation up and down steep hills.
In 1848, the turbine was created, improving the waterwheels and mills which were bulky and slow. Turbines are specific to each site.
The first hydroelectric power plant was built at the Niagara Falls in 1879.
In the late 1940’s, big dams for hydropower had been built.
The total worldwide technical potential for hydropower is estimated at 14,576 TWh/yr (52.47 EJ/yr), over four times the current worldwide annual generation. This technical potential corresponds to a derived estimate of installed capacity of 3,721 GW.
Hydroelectric generation can also work without dams, in a process known as diversion, or run-of-the-river. Run-of-the-river hydroelectric stations are those with small or no reservoir capacity, so that the water coming from upstream must be used for generation at that moment, or must be allowed to bypass the dam.
Run-of-river schemes use the natural flow of a river, where a weir can enhance the continuity of the flow. Both storage and run-of-river schemes can be diversion schemes, where water is channeled from a river, lake or dammed reservoir to a remote powerhouse, containing the turbine
water pumped to a storage pool above the power plant at a time when customer demand for energy is low.
The water is then allowed to flow back through the turbine-generators at times when demand is high.
Global installed hydropower capacity was estimated to be between 926 GW and 956 GW in 2009/2010, excluding pumped storage hydropower capacity.