Hydroelectricity

HYDROELECTRIC POWER

SHAURYA GOYAL

INTRODUCTIONINTRODUCTION

Hydroelectricity is a good source Hydroelectricity is a good source of green energy. It has been of green energy. It has been used as an environmental power used as an environmental power source for years and is a good source for years and is a good substitute of coal, oil and gas. substitute of coal, oil and gas. Although there are some Although there are some positive aspects of positive aspects of hydroelectricity. There are also hydroelectricity. There are also negatives. negatives.

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.

HYDROELECTRIC POWER

Is:

HYDROELECTRIC POWER

Is: A form of energy. Renewable source of energy.

HYDROELECTRIC POWER


Is not:

HYDROELECTRIC POWER


Is not: A non renewable source of energy. A source of greenhouse gases.

WHAT IS RENEWABLE SOURCE OF ENERGY?It is:-

WHAT IS RENEWABLE SOURCE OF ENERGY?It is:- Energy that comes from resources which are continually replenished on a human timescale such as

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

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

TidesWavesGeothermal Heat

HOW TO GENERATE HOW TO GENERATE HYDROELECTRICITY?HYDROELECTRICITY?

It can be generated by:-It can be generated by:-



Conventional Dams

Pump storage



Conventional Dams

Pump storage

Run of the river

Tide Underground

DAMSDAMS1.1. A dam is a barrier that A dam is a barrier that impounds water or or

underground streams. underground streams. 2.2. Dams generally serve the primary purpose of Dams generally serve the primary purpose of

retaining water, while other structures such as retaining water, while other structures such as floodgates or or levees (also known as (also known as dikes) are used ) are used to manage or prevent water flow into specific land to manage or prevent water flow into specific land regions.regions.

3.3. Hydropower and pumped-storage Hydropower and pumped-storage hydroelectricity are often used in conjunction with hydroelectricity are often used in conjunction with dams to generate electricity.dams to generate electricity.

4.4. A dam can also be used to collect water or for A dam can also be used to collect water or for storage of water which can be evenly distributed storage of water which can be evenly distributed between locations.between locations.

How does hydroelectric dam How does hydroelectric dam works?works?

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 vertical- and 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

ADVANTAGES OF HYDROELECTRIC POWER

ADVANTAGES OF HYDROELECTRIC POWER High quality energy output compared High quality energy output compared with low quality energy output.with low quality energy output.

Creates water reserves as well as Creates water reserves as well as energy supplies.energy supplies.

Reservoirs used for recreation, Reservoirs used for recreation, amenity.amenity.

Good safety record.Good safety record.

DISADVANTAGES OF HYDROELECTRIC POWER

DISADVANTAGES OF HYDROELECTRIC POWER They are costly to build.They are costly to build. Can cause the flooding of surrounding Can cause the flooding of surrounding

communities and landscapes.communities and landscapes. Dams have major ecological impacts on local Dams have major ecological impacts on local

hydrology.hydrology. Silting of dams.Silting of dams. Downstream lack of water (e.g. Nile) and risk Downstream lack of water (e.g. Nile) and risk

of flooding if dam bursts.of flooding if dam bursts.

Three Gorges dam in China is the largest hydroelectric power station in the world.

The Itaipu dam in the Brazil is the second largest hydroelectric power station in the world.

Resources Resources FromFrom

THE ENDTHE END

Education

Hydroelectricity