Resources

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•A source or supply from which benefit is

produced.

3 main characteristics:

Utility

Limited availability

Potential for depletion or

consumption.

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• A natural resource.

• Ability to reproduce through

biological or natural processes

and replenished with the

passage of time.

• Are part of our natural

environment and form our eco-

system .

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• Solar energy

• Tides

• Winds

• Geothermal

• Biomass and

• Other natural elements.

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• Gasoline,

• Coal

• natural gas,

• diesel and

• other commodities derived

from fossil fuels.

• minerals like copper and

others without a sustainable

yield.

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Renewable resources

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Solar energy

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• Energy derived from the sun in the

form of solar radiation.

• It is the most readily available and

free source of energy since prehistoric

times.

• India receives solar energy in the

region of 5 to 7 kWh/m2 for 300 to

330 days in a year.

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• This energy is sufficient to set up 20

MW solar power plant per square

kilometer land area.

• Solar thermal route uses the sun's

heat to produce hot water or

air, cook food, drying materials etc.

• Solar photovoltaic uses sun’s heat

to produce electricity for lighting

home and building, running

motors, pumps, electric

appliances, and lighting.

Solar Flat plate collector

Box type solar cookers:

Photovoltaic Domestic

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Wind Energy

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Wind Energy

• Harnessing of wind power to produce

electricity.

• The kinetic energy of the wind is converted

to electrical energy.

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• When solar radiation enters the

earth’s atmosphere, different

regions of the atmosphere are

heated to different degrees because

of earth curvature.

• This heating is higher at the equator

and lowest at the poles.

• Since air tends to flow from warmer

to cooler regions, this causes winds,

and it is these airflows that are

harnessed in windmills and wind

turbines to produce power

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Bio Energy • A renewable energy resource

derived from the carbonaceous

waste of various human and

natural activities.

• Derived from numerous

sources, including the by-products

from the wood

industry, agricultural crops, raw

material from the

forest, household wastes etc.

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• Does not add carbon dioxide to

the atmosphere as it absorbs the

same amount of carbon in

growing as it releases when

consumed as a fuel.

• Advantage is used to generate

electricity with the same

equipment that is now being

used for burning fossil fuels.

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Biogas

• Bio-energy, in the form of biogas, which is

derived from biomass,

• Is expected to become one of the key

energy resources for global sustainable

development.

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Hydro Energy

• The potential energy of falling

water, captured and converted

to mechanical energy by

waterwheels.

• Water under pressure flows

through a turbine causing it to

spin. The Turbine is connected

to a generator, which produces

electricity

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Hydro Power Plant

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Tidal Energy

• Tidal electricity generation

involves the construction of a

barrage across an estuary to

block the incoming and outgoing

tide.

• The head of water is then used

to drive turbines to generate

electricity from the elevated water

in the basin as in hydroelectric

dams.

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Let’s contribute for a Greener Planet…

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