Transcript Presented by:- 21. Kunal Kaklij. 22. Ritesh Kedare. 23. Kuldeep Kharjul. 24. Salman Khatik.

Presented by:- 21. Kunal Kaklij.
22. Ritesh Kedare.
23. Kuldeep Kharjul.
24. Salman Khatik.
What is Hydro-electricity?
 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.
History…
 In the mid-1770s, French engineer Bernard Forest de
Belidor published Architecture Hydraulique which
described vertical- and horizontal-axis hydraulic
machines. In 1878 the world's first hydroelectric power
scheme was developed at in Northumberland, England
by William George Armstrong. It was used to power a
single light bulb in his art gallery. The old Schoelkopf
Power Station No. 1 near Niagara Falls in the U.S. side
began to produce electricity in 1881.
Advantages and Disadvantages of
Hydroelectricity
 Advantages
1. The major advantage of hydroelectricity is
2.
3.
4.
5.
elimination of the cost of fuel.
Reservoirs created by hydroelectric schemes often
provide facilities for water sports, and become
tourist attractions themselves.
In some countries, aquaculture in reservoirs is
common.
Multi-use dams installed for irrigation support
agriculture with a relatively constant water supply.
Large hydro dams can control floods, which would
otherwise affect people living downstream of the
project.
Disadvantages
 Hydroelectric power stations that use dams would




submerge large areas of land due to the requirement of
a reservoir.
Hydroelectric projects can be disruptive to
surrounding aquatic ecosystems both upstream and
downstream of the plant site.
Generation of hydroelectric power changes the
downstream river environment.
Water exiting a turbine usually contains very little
suspended sediment, which can lead to scouring of
river beds and loss of riverbanks.
Another disadvantage of hydroelectric dams is the
need to relocate the people living where the reservoirs
are planned.
Images Related to Hydro-electricity
Turbines row at L0s Nihuiles Power Station in Mendoza, Argentina.
Hydro-electric Dam
Cross section of a conventional hydroelectric dam.
A typical turbine and generator
Sizes and capacities of hydroelectric facilities
The Three Gorges Dam is the largest operating
hydroelectric power station, at 22,500 MW.
The Hoover Dam in the United States is a large conventional dammed-hydro facility,
with an installed capacity of 2,080 MW.
The Gordon Dam in Tasmania is a large hydro facility, with
an installed capacity of 430 MW.
Koyna Dam
 The Koyna Dam is one of the
largest dams in Maharashtra, India. It is a rubble-concrete
dam constructed on Koyna River which rises in
Mahabaleshwar, a hill station in Sahyadri ranges. It is
located in Koyna Nagar, Satara district, nestled in
the Western Ghats on the state highway
between Chiplun and Karad.
 The main purpose of dam is to
provide hydroelectricity with some irrigation in
neighboring areas. Today the Koyna Hydroelectric
Project is one of the largest hydroelectric project in India
having a total installed capacity of 1,920 MW. Due to its
electricity generating potential it is considered as the 'life
line of Maharashtra'
 The dam has contributed to earthquakes in the recent
past, including the devastating 1967 Koynanagar
earthquake, resulting in the dam developing some
cracks. After the disaster Grouting of the cracks was
done. Also internal holes were drilled to relieve
the hydrostatic pressures in the body of the dam.
 In 1973 non overflow portion of the dam was
strengthened followed by strengthening
of spillway section in 2006. Now the Dam expected to
be safe against any future earthquake even of more
intensity than that of 1967.
 The catchment area dams the Koyna river and forms
the Shivasagar Lake which is approximately 50 km
(31 mi) in length. It is one of the largest civil
engineering projects commissioned after Indian
independence. The Koyna hydro-electric project is run
by the Maharashtra State Electricity Board.
Koyna Dam
World hydroelectric capacity
Country
Annual
Installed
hydroelectric capacity
production
Capacity
factor
% of total
capacity
China
652.05
196.79
0.37
22.25
Canada
369.5
88.974
0.59
61.12
Brazil
363.8
69.080
0.56
85.56
United
States
250.6
79.511
0.42
5.74
Russia
167.0
45.000
0.42
17.64
Norway
140.5
27.528
0.49
98.25
India
115.6
33.600
0.43
15.80
Venezuela
85.96
14.622
0.67
69.20
THANK YOU…