Power for the PeoplePower for the People

Learning objectives:Learning objectives: Know different ways of producing Know different ways of producing

electricityelectricity Understand the difference between Understand the difference between

renewable and non-renewable renewable and non-renewable resourcesresources

Decide how we can supply Cotterton Decide how we can supply Cotterton with electricitywith electricity

ElectricityElectricity

How can we produce How can we produce electricity?electricity?

Non-renewable:Non-renewable: CoalCoal OilOil Natural GasNatural Gas Nuclear PowerNuclear Power

Renewable:Renewable: SolarSolar WindWind HydroelectricHydroelectric TidalTidal WaveWave BiomassBiomass GeothermalGeothermal

Non-renewable energyNon-renewable energy

Burning fossil fuelsBurning fossil fuels

Renewable energyRenewable energy

Wind powerWind power

Sun heats certain areasSun heats certain areas Creates pressure differenceCreates pressure difference Produces windProduces wind

Wind turns bladesWind turns blades Turns turbineTurns turbine Produces electricityProduces electricity

Simple – no need for steamSimple – no need for steam

AdvantagesAdvantages DisadvantagesDisadvantagesUnreliable

Few areas suitable

Low power energy source

Noisy and unsightly

Renewable

No acid rain

No global warming

Cheap to run once built

Expensive to build

Large area required

Kills migratory birds

Advantages and Advantages and disadvantagesdisadvantages

Wave powerWave power

Wind over the sea – wavesWind over the sea – waves Used to turn a turbineUsed to turn a turbine

Very expensive set upVery expensive set up Low energy outputLow energy output

Tidal powerTidal power

Gravity of moonGravity of moon Pulls sea up and downPulls sea up and down

Used to turn a turbineUsed to turn a turbine

Non polluting, renewable and cheap Non polluting, renewable and cheap to runto run

Expensive set up, low outputExpensive set up, low output

More renewable energyMore renewable energy

Solar powerSolar power

Photo- voltaic cells (photo = light Photo- voltaic cells (photo = light voltaic= electricity)voltaic= electricity) Light energy hits cellLight energy hits cell Knocks electron loseKnocks electron lose Flowing electrons = electricityFlowing electrons = electricity

Solar heating cellsSolar heating cells Turn water to steam – turbineTurn water to steam – turbine Heating waterHeating water

AdvantagesAdvantages DisadvantagesDisadvantagesUnreliable – why?

Few areas suitable

Low power energy source

Toxic chemicals in solar cells can

damage habitats

Renewable

No acid rain

No global warming

Cheap to run once built

Expensive to build

Advantages and Advantages and disadvantagesdisadvantages

HydroelectricityHydroelectricity

Cold water pumped

down

Warm water comes back up

and used to turn turbines

Water heated by hot rocks

Advantages?

Disadvantages?

Renewable

No acid rain or greenhouse effect

Cheap once built

Few areas suitable

Expensive to build

GeothermalGeothermal

AdvantagesAdvantages DisadvantagesDisadvantagesDestroys habitats

Few areas suitable

Unsightly

Renewable

No acid rain

No global warming

Cheap to run once built Expensive to build

Large area requiredSome systems pump water back up at night with the surplus electricity – energy efficient.

Pros and consPros and cons

Renewable energy in Renewable energy in CottertonCotterton

What does Cotterton What does Cotterton need?need?

8000 inhabitants8000 inhabitants 3000 people live in families (2 adults + 2 3000 people live in families (2 adults + 2

children)children) 3500 Couples live together3500 Couples live together 1500 Single people1500 Single people

Average electricity useAverage electricity use Family = 5480 KWh per yearFamily = 5480 KWh per year Couple = 4117 KWh per yearCouple = 4117 KWh per year Single person = 3084 KWh per yearSingle person = 3084 KWh per year

1 wind turbine produces 4700000 KWh 1 wind turbine produces 4700000 KWh per yearper year

What do we know about What do we know about energy resources?energy resources?

Get into 2 teamsGet into 2 teams

Power for the PeoplePower for the People

Learning outcomes:Learning outcomes: What are some of the different ways What are some of the different ways

of producing electricity?of producing electricity? What’s the difference between What’s the difference between

renewable and non-renewable renewable and non-renewable resources?resources?

How can we supply Cotterton with How can we supply Cotterton with electricity?electricity?