Hydroelectricity

1. hydoelectricity
MAde By : yAthArth kochhAr
clASS : X “A” `

2. Which iS the BeSt
SoUrce oF eNerGy??
Question of the modern age

3. Hydroelectric Power
Energy created by a heavy flowing water

4. OUR Objectives
•We will be discuss about the source of
Hydroelectric energy
•History of hydroelectericity
•We will describe “how Hydroelectric energy is
produced?”
•We will show Hydroelectric energy as an very
useful acceptable source of energy
•We will discuss where is Hydroelectricity is
used

5. iNVeNtioN oF
hydroeletricity

6. History of Hydroelectric Power
• Nearly 2000 years ago the Greeks used
water wheels to grind wheat into flour
• In the 1700's, hydropower was broadly used
for milling of lumber and grain and for
pumping irrigation water
• Appleton, Wisconsin became the first
operational hydroelectric generating station in
the United States, in 1882, producing 12.5
kilowatts (kW) of power

7. • The total electrical capacity generated was
equivalent to 250 lights
•Within the next 20 years roughly 300
hydroelectric plants were operational
around the world
• The invention of the hydraulic reaction
turbine created the sudden expansion of
hydropower
•40% of the United States' electricity was
provided by hydroelectric power in the
early 1900's

8. INTRODUTION
•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, Previously16%  
of global electricity generation 3,427 
terawatt-hours of electricity production in 
2010,
[1]

9. •At todays date Hydropower is produced in 
150 countries, including Asia.
• China is the largest hydroelectricity 
producer, with 721 terawatt-hours of 
production in 2010, representing around 17 
percent of domestic electricity use. There 
are now three hydroelectricity plants larger 
than 10 GW: the Three Gorges Dam in 
China, Itaipu Dam across the 
Brazil/Paraguay border, and Guri Dam in 
Venezuela.

10. •The cost of hydroelectricity is compare vise 
low, As it is a renewable electricity.
• The average cost of electricity from a 
hydro plant larger than 10 megawatts is 3 to 
5 U.S. cents per kilowatt-hour.
 
•We used hydro power because it becomes 
our necessary to use hydro power as we 
need a alternative for fossil fules
•However, making dams interrupts the flow 
of rivers and can harm local ecosystems, 
and building large dams and reservoirs 
often involves displacing people and 

11. •wildlife. Once a hydroelectric complex is 
constructed, the project produces no direct 
waste, and has a considerably lower output 
level of the greenhouse gas carbon dioxide 

12. Who’s using it?
•Supplies 20% of world’s 
electricity and 6% of it’s 
total commercial energy
•3 largest producers are
Canada, U.S., and Brazil
•Projected use over the 
next 10 years: Canada 
70%, China 10%, 
U.S.10%
0%
10%
20%
30%
40%
50%
60%
70%
Canada
China
U.S.

13. TRADITIONAL WAYS OF MAKING 
HYDROENERGY….

14. Breast Shot Wheel
Breast shot wheel:
One type of traditional
Water wheel
Water wheels: source
Of power for the
Industrial revolution

16. Overshot Wheel
It was more efficient that
breast shot wheel. Some
mills using
These wheels still in
operation
In rural areas in from
1950’s till know
Miller: Mrs. Aarendale

17. MODERAN WAY OF
HYDROELECTRICIY……

21. How useful is it?
•Moderate to high net useful energy yield
• fairly low operating and maintenance costs
•low pollution
•rarely shut down
•help control flooding
•supply a regulated flow of irrigation water to
lowlands below the dam

22. Compared to Others
•Has moderate to high net useful energy
•Solar energy and hydroelectric are the
highest producers of energy besides
nonrenewable resources

23. Drawbacks
•Flood vast areas
•destroys wildlife habitats
•uproots people
•keeps nutrients from being sent downstream
•decreases fish harvests below the dam
•keep fish from migrating upstream
•kills large numbers of fish

25. H
o
o
v
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D
a
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26. Glen Canyon Dam (Utah)

27. •The largest Hydroelectric Power Plant in the
world
•The Yangst River in China

28. THE END