energy resources - rachel ecclestone

8/8/2019 Energy Resources - Rachel Ecclestone

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EnergyEnergyResources.Resources.

Rachel EcclestoneRachel Ecclestone


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S olar Energy.S olar Energy.

Solar Cells convertradiant energy into

Electricitly

Solar Panels.Water passing through

panels is heated by sun.

Solar Furnaces.Array of concave

mirrors concentrate sunray s. Creating heat.

Advantages:Advantages:

No pollution.No pollution.

Renewable source of Energy.Renewable source of Energy.

Disadvantages:Disadvantages:

Limited use in places where there is notLimited use in places where there is not

continous sunshine.continous sunshine.

The initial costs can be very high.The initial costs can be very high.


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Wi nd Energy.Wi nd Energy.

Kinetic Energy used todrive wind turbine

Wind turbines generateelectricity.

Electricity passed ontonational grids.


Renewable energy source.Renewable energy source.

Excellent source for isolatedExcellent source for isolated

communities.communities.

Low level tehcnology (developingLow level tehcnology (developing

countries).countries).


Causes visual & noise pollution.Causes visual & noise pollution.

Windy site essential.Windy site essential.

Efficiency of energy capture/transfer isEfficiency of energy capture/transfer is

very low through more efficientvery low through more efficient

turbines are being developed.turbines are being developed.


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H ydroelectr i c Energy.H ydroelectr i c Energy.

Water iscollected/stored behinddams (usually on high

ground)

Water released throughsluices or pipes.

The waters kineticenergy is used to drive

generators and produceelectricity.


Renewable source of energy.Renewable source of energy.

No pollution.No pollution.


Limited number of suitable sites.Limited number of suitable sites.

High initial cost.High initial cost.

Environmental problems, e.g flooding of Environmental problems, e.g flooding of

valleys and consequent effect on wildlife.valleys and consequent effect on wildlife.


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T i dal Energy.T i dal Energy.

Potential energy of ahigh tide is stored

behind dams.

Potential Energyreleased at low tide.

The flow of water isused to drivegenerators.




High initial costHigh initial cost. .

Visual pollution.Visual pollution.


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Wave Energy.Wave Energy.

Rocking motion of waves moves

turbines/panels

Panels use the motionto generate electricity.

Electricity tranferred tonational grid/electricity

storage area.


Renewable energy of energy.Renewable energy of energy.


Very ineffiecient capture of energy.Very ineffiecient capture of energy.

Very large area needed to captureVery large area needed to capture

enough energy to be viable, visualenough energy to be viable, visual

pollution.pollution.


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G eothermal Energy.G eothermal Energy.

Nuclear reactions deepin the Earth create high

temperatures.

Cold water pumpedthrough pipes becomes

so hot that is boils,.

S team produced on itsreturn tothe surface isused to drive turbines& generate electricity.




Limited number of suitable sites.Limited number of suitable sites.

High cost of drilling deep into the earth.High cost of drilling deep into the earth.


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B i omass.B i omass.

Eg. For wood -Renewable recources

grown.

Resources cut downand stored.

Resources burnt as afuel/energy source.



Low level technology, good forLow level technology, good for

developing countries.developing countries.


Possible pollution & damage to ozonePossible pollution & damage to ozone

layer.layer.

Large areas ofl and will need used toLarge areas ofl and will need used to

produce enough biomass. This may beproduce enough biomass. This may be

affect the ecology of the environment.affect the ecology of the environment.

Renewable Fuels e.g.:WoodSugar Cane


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N uclear Energy (fus i on).N uclear Energy (fus i on).

When Uranium-235absorbs a nuetron itbecomes unstable.

The uranium splits intotwo smaller atoms &

releases large amountof energy.

Energy used to turnwater intoo steam to

drive turbines &produce electricity.


S mall amounts of fuel produceS mall amounts of fuel produce

large amounts of energy.large amounts of energy.


Because of the dangers of radioactivityBecause of the dangers of radioactivity

there is need for very costly, high levelthere is need for very costly, high level

saftey precautions.saftey precautions.

The treatment of spent fuel & theThe treatment of spent fuel & the

decomissioning of nuclear power stationsdecomissioning of nuclear power stations

is extremely expensive.is extremely expensive.

energy resources - rachel ecclestone

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