Alternative sources of energy

Август 27, 2022

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Alternative sources of energy

Содержание

2. Alternative sources of energy: Wind power. Solar energy. Geothermal energy. Water power: hydro-electric power; tidal power;
3. Wind power
4. Wind power The most common way of getting energy from the wind is through setting up
5. Wind power The advantages: wind power enables electricity to be produced in an environmentally friendly way
6. Solar power
7. Solar power The photovoltaic effect. Photovoltaic cells (PV’s) used as roof tiles. Designing buildings to collect
8. The advantages: no extra land space is needed; can also be situated in urban areas, where
9. Geothermal electric stations
10. Geothermal energy There are hot springs in Iceland, which get their warm from the Earth Geothermal
11. Geothermal energy The advantages: no fossil fuel burning is required; emit only excess steam and very
12. Water power
13. Tidal power It works by using the gravitational pull of the moon, which creates tidal rises
14. Tidal power The advantages: using natural forces; in the long-term it could enable cheaper electricity; once
15. Hydro-electric power A reservoir is built with a dam in it. A mass of water is
16. Hydro-electric power The advantages: pollution free and safe when up and running The disadvantages: creating it
17. Wave power It works by capturing mass of kinetic energy created by waves. Building dams or
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Слайд 2

Alternative sources of energy:
Wind power.
Solar energy.
Geothermal energy.
Water power:
hydro-electric power;
tidal power;
wave power

Слайд 3

Wind power

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Wind power
The most common way of getting energy from the wind

is through setting up “Wind farms”. When they were first introduced they were very expensive, however, over the years, initial costs have fallen, and therefore the cost of getting electricity from the wind has dropped considerably.

Слайд 5

Wind power
The advantages:
wind power enables electricity to be produced in an

environmentally friendly way – the turbines do not produce chemical or radioactive emissions. The ground on which the turbines are positioned can still be used for agricultural purposes.
The disadvantages:
wind farms can be costly to maintain and electricity produced by this method is more expensive than that produced by other means;
the noise has been criticized by some people who live very close to this;
the turbines can cause some slight electromagnetic interference, which can cause interference with television signals and some communication equipments.

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Solar power

Слайд 7

Solar power
The photovoltaic effect. Photovoltaic cells (PV’s) used as roof tiles.
Designing

buildings to collect the heat. Large glass windows, heating water pipes

Слайд 8

The advantages:
no extra land space is needed;
can also be situated in

urban areas,
where there is plenty of available space;
easy to install;
replace the need for other materials, such as tiles;
generate more electricity than is needed at certain times in the day, so can be sold back to local electricity companies.
The disadvantages:
depend on changeable weather;
costly installation.

Solar power

Слайд 9

Geothermal electric stations

Слайд 10

Geothermal energy
There are hot springs in Iceland, which get their warm

from the Earth

Geothermal that is “Earth’s heat”. The centre of the earth is hot.
Geothermal heat pumps – using series of pipes to circulate fluid through the warm ground.
Electricity production using a turbine driven by steam, which then drives a generator.

Слайд 11

Geothermal energy
The advantages:
no fossil fuel burning is required;
emit only excess steam

and very few trace gases;
take up very little land;
geothermal heat pumps can be used nearly everywhere.
advanced drilling techniques minimize the impact of drilling wells;
electricity produced more “available” as fossil-fuelled power plants produce electricity 65-75% of the time compared to 90% from geothermal power plants.

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Water power

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Tidal power
It works by using the gravitational pull of the moon,

which creates tidal rises and falls, to produce energy.

Слайд 14

Tidal power
The advantages:
using natural forces;
in the long-term it could enable cheaper

electricity;
once up and running, quite safe to the environment.
The disadvantages:
tidal power generators can be quite expensive to set-up;
the disruption to the area;
the risk of pollution to the river.

Слайд 15

Hydro-electric power
A reservoir is built with a dam in it.
A mass

of water is held back by the damp and then suddenly released all at once, sending the water through a turbine at great force.

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Hydro-electric power
The advantages:
pollution free and safe when up and running
The disadvantages:
creating

it there can be tremendous disruption and upset to the environment, animals and nearby residents;
finding sites large enough for this is quite hard.

Слайд 17

Wave power
It works by capturing mass of kinetic energy created by

waves.
Building dams or pipes for the water to go up.

Alternative sources of energy

Содержание

Alternative sources of energy:Wind power.Solar energy.Geothermal energy.Water power:hydro-electric power;tidal power;wave power

Wind power

Wind powerThe most common way of getting energy from the wind

Wind powerThe advantages:wind power enables electricity to be produced in an

Solar power

Solar powerThe photovoltaic effect. Photovoltaic cells (PV’s) used as roof tiles.Designing

The advantages:no extra land space is needed;can also be situated in

Geothermal electric stations

Geothermal energyThere are hot springs in Iceland, which get their warm

Geothermal energyThe advantages:no fossil fuel burning is required;emit only excess steam

Water power

Tidal powerIt works by using the gravitational pull of the moon,

Tidal powerThe advantages:using natural forces;in the long-term it could enable cheaper

Hydro-electric powerA reservoir is built with a dam in it.A mass

Hydro-electric powerThe advantages:pollution free and safe when up and runningThe disadvantages:creating

Wave powerIt works by capturing mass of kinetic energy created by

Похожие презентации

Alternative sources of energy:
Wind power.
Solar energy.
Geothermal energy.
Water power:
hydro-electric power;
tidal power;
wave power

Wind power
The most common way of getting energy from the wind

Wind power
The advantages:
wind power enables electricity to be produced in an

Solar power
The photovoltaic effect. Photovoltaic cells (PV’s) used as roof tiles.
Designing

The advantages:
no extra land space is needed;
can also be situated in

Geothermal energy
There are hot springs in Iceland, which get their warm

Geothermal energy
The advantages:
no fossil fuel burning is required;
emit only excess steam

Tidal power
It works by using the gravitational pull of the moon,

Tidal power
The advantages:
using natural forces;
in the long-term it could enable cheaper

Hydro-electric power
A reservoir is built with a dam in it.
A mass

Hydro-electric power
The advantages:
pollution free and safe when up and running
The disadvantages:
creating

Wave power
It works by capturing mass of kinetic energy created by