Презентация на тему Alternative sources of energy

power;
tidal power;
wave power

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.

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.

as roof tiles.
Designing buildings to collect the heat. Large

glass windows, heating water pipes

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

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.

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.

of the moon, which creates tidal rises and falls,

to produce energy.

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.

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.

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.

energy created by waves.
Building dams or pipes for the

water to go up.