biomass, tidal wind: renewable sources of energy

1. Wind Energy
Tidal Power
Biomass

2. Wind
Energy
What is Wind Power?
Wind is caused by huge convection currents in the Earth's
atmosphere, driven by heat energy from the Sun. This
means as long as the sun shines, there will be wind.
The moving air (wind) has huge amounts of kinetic energy,
and this can be transferred into electrical energy
using wind turbines. The wind turns the blades, which spin
a shaft, which connects to a generator and makes
electricity. The electricity is sent through transmission and
distribution lines to a substation, then on to homes,
business and schools.

3. Wind
Energy
Wind turbines cannot work if there is no wind,
or if the wind speed is so high it would damage them.
Wind turbines are usually sited on high hills and
mountain ridges to take advantage of the prevailing
winds.
Just like a windmill, wind energy turbines have been
around for over 1000 years. From old Holland to farms
in the United States, windmills have been used for
pumping water or grinding grain.

4. windmills wind turbines

5. ..How Wind Turbines generate electric

6. Types of Wind Turbines
1. HAWT (Horizontal Axis Wind Turbines)
the common style that most of us think of
when we think of a wind turbine. A HAWT has
a similar design to a windmill, it has blades
that look like a propeller that spin on the
horizontal axis.

7. HAWT (Horizontal Axis Wind
Turbine)

8. Types of Wind Turbines
2. VAWT (Vertical Axis Wind Turbines)
have the main rotor shaft arranged vertically.
The main advantage of this arrangement is that
the wind turbine does not need to be pointed
into the wind. This is an advantage on sites
where the wind direction is highly variable or has
turbulent winds.
With a vertical axis, the generator and other
primary components can be placed near the
ground, so the tower does not need to support it,
also makes maintenance easier.

9. VAWT (Vertical Axis Wind Turbines)

10. • Did you know...
The largest wind turbine in the world, located in Hawaii,
stands 20 stories tall and has blades the length of a football field.
• An average wind speed of 14 miles per hour is needed to
convert wind energy into electricity.
• One wind turbine can produce enough electricity to power up to 300
homes.
The first power-generating turbine was constructed in
Ohio during the late 1800's and was used to charge batteries.
• Wind energy is the fastest growing segment of all renewable energy
sources.

12. Wild Horse Wind Farm -Kittitas County,
Washington, USA

13. Tehachapi Pass Wind Farms –
Southern California, USA

14. Barrow Offshore Wind Farm – East Irish
Sea, UK

15. Middelgrunden Wind Turbine Cooperative
– Copenhagen, Denmark

16. Wind Power Plants in the
Philippines
Philippine Wind Farm Puerto Galera,Mindoro
Bangui Wind Farm Bangui, Ilocos Norte
Caparispisan Wind Farm Pagudpud, Ilocos Norte
San Lorenzo Wind Farm San Lorenzo,Guimaras
Burgos Wind Farm Burgos, Ilocos Norte
Pililla Wind Farm Pililla, Rizal
Sembrano Wind Farm Pililla, Rizal

17. Philippine Wind Farm, Mindoro

18. Burgos Wind Farm

19. ADVANTAGES OF WIND POWER:
1. Once the wind turbine is built the energy it produces does not
cause green house gases or other pollutants.
2. Although wind turbines can be very tall each takes up only a
small plot of land. This means that the land below can still be used.
This is especially the case in agricultural areas as farming can still
continue.
3. Many people find wind farms an interesting feature of the
landscape
.
4. Remote areas that are not connected to the electricity power
grid can use wind turbines to produce their own supply.

20. DISADVANTAGES OF WIND POWER
1. The strength of the wind is not constant and it varies
from zero to storm force. This means that wind turbines do
not produce the same amount of electricity all the time.
There will be times when they produce no electricity at all.
2. Wind turbines are noisy. Each one can generate the
same level of noise as a family car travelling at 70 mph.
3. Large wind farms are needed to provide entire
communities with enough electricity. For example, the
largest single turbine available today can only provide
enough electricity for 475 homes, when running at full
capacity. How many would be needed for a town of 100
000 people?

21. Tidal Energy
• Tidal energy generators uses the rise and fall
of tides to convert the kinetic energy of the
tides to electrical energy.
• Tidal energy is considered as renewable
source of energy as tides are produced
constantly on sea shores and can be used to
produce electricity on a large scale.
• Secondly, they are more predictable than
wave energy.

22. Tidal Energy
• Some tidal structures (or devices) look a lot like wind
energy blades, but this time, installed under water to
harness the kinetic energy in the oceans currents.
• Unlike in wind turbines, the blades in tidal energy
devices move a lot slower because of the high
density of the medium (water). However, they carry
a lot of power.
• Examples of tidal energy convertors include the
Horizontal Axis Turbine, Vertical Axis Turbine and
the Oscillating Hydrofoil.

23. Horizontal Axis Turbine

24. Vertical Axis Turbine

25. Oscillating Hydrofoil

26. How does it work?

27. The world’s biggest Tidal Power Plant is the
Sihwa Lake Tidal Power Station in South
Korea, with 254MW output capacity.
There is also a 240MW output capacity plant in
France called La Rance Tidal Power Plant.

28. Sihwa Lake Tidal Power Station in
South Korea

29. La Rance Tidal Power Plant

30. Country Location
Sihwa Lake South Korea
Rance France
Annapolis Royal Canada
Jiangxia China
Kislaya Guba Russia

31. Annapolis Royal
Canada

32. Jiangxia, China

33. Kislaya Guba, Russia

34. Disadvantages
•A dam to make the water flow
through the generators might be
needed.
•Plants and animals that live
nearby might get harmed
•The tides only happen twice a
day, so can only produce
electricity at that time.
Advantages
•Tides are free and will not
run out.
•No greenhouse gases are
produced.
•It is reliable because we
know exactly when the tides
happen.

35. Biomass
• the energy which is contained inside plants and animals.
• This can include organic matter of all kinds: plants, animals,
or waste products from organic sources.
• These sorts of energy sources are known as biofuels and
typically include wood chips, rotted trees, manure, sewage,
mulch, and tree components. Chlorophyll present in plants
absorbs carbon dioxide from the atmosphere and water
from the ground through the process of photosynthesis.
The same energy is passed to animals when they eat them.

36. Biomass
• It is considered to be as renewable source of
energy because carbon dioxide and water
contained inside plants and animals are
released back in to the atmosphere when they
are burned and we can grow more plants and
crops to create biomass energy.

37. How does it work?

38. • Steven’s Croft in Lockerbie, Scotland is the
UK’s largest wood fired biomass station.
With an output of 44MW it supplies the
electrical needs of 70,000 Scottish homes,
displacing around 140,000 tonnes of
greenhouse gases.

39. Steven’s Croft in Lockerbie,
Scotland

40. Station Country
Drax United Kingdom
Tilbury B United Kingdom
Ironbridge B United Kingdom
Alholmens Kraft Finland
Maasvlakte 3 Netherlands
Połaniec Poland
Atikokan Generating Station Canada
Rodenhuize Belgium
Ashdown Paper Mill United States

41. Drax, United Kingdom

42. Alholmens Kraft, Finland

43. Maasvlakte 3, Netherlands

44. Biomass Power Plants in the
Philippines
• Green Power Panay Philippines Inc: One 35 MW Biomass
Power Plants - Mina, Iloilo, Panay, Philippines.
• Green Power Nueva Ecija Philippines Inc: One 35 MW
Biomass Power Plants - San Leonardo, Nueva Ecija, Luzon,
Philippines.
• Green Power Bukidnon Philippines Inc: One 35 MW Biomass
power Plant - Maramag, Bukidnon, Mindanao, Philippines.
• Green Power Cagayan Philippines Inc: One 35 MW Biomass
Power Plant - Alcala, Cagayan, Luzon, Philippines.

45. Disadvantages
•Inefficient (only 30%
efficiency).
•Releases harmful solid
carbon particles into the
atmosphere.
Advantages
•Produces less pollution
than fossil fuels.
•Does not cause acid rain.
•Can be found locally.
•It is renewable.