Wave power 2013
|Clic on the individual links below to see the presentations from Friday 4th Oct 2013|
This is the project from Christian, Luuk, Alex and Thomas and it's about wave power.
Wave Power: Pros & Cons
Pros Consistent Power - Waves move constantly throughout the day, which provides a consistent stream of electricity generation capacity.
Pollution-Free - By taking advantage of only the waves, wave power creates no greenhouse gas emissions or water pollutants.
Low Operating Costs - Once installed there are few ongoing operating costs or labor costs, unless there is a device breakdown.
Renewable - No material resources are used or changed in the production of wave power, making it a truly renewable power form.
Minimal Visual Impact - Most wave power devices are installed mostly or fully submerged in water. By installing the devices far enough from shore there is minimal “damage of water views” that has been associated with offshore wind turbines.
Efficient - Most wave power devices operate at optimal efficiency levels regardless of the direction of the waves.
Shoreline Protection - By capturing the kinetic energy of the tide there will be less power crashing into the shore, which should help prevent damage to the shoreline.
Cons Device Breakdown - Strong ocean storms and salt water corrosion can damage the devices, which could increase the cost of construction to increase durability and/or cause frequent breakdowns. This especially holds true with the increased complexity of the devices.
Marine Life Affected - Sea life could be harmed or have habitats disrupted or displaced by the operation of the devices or the mooring of the devices.
High Initial Costs - The high cost of device and associated power products could lengthen the payback period and be cost prohibitive based on the characteristics and size of each project.
Few Implemented - There are relatively few commercial installations as compared to other technologies, such as wind and solar farms. As such, additional difficulties implementing these devices could arise.
Reduced Sea Usage - The potentially larger footprint of ocean-dwelling device farms could reduce shipping channels and fishing and recreation areas.
Noise - The movement of Attenuators or Point Absorbers or intake and movement of water in the OWC and Overtopping devices could produce a loud, constant noise. This noise is unlikely going to be significantly louder than the waves would make on their own.
How does it work: The waves go up and down and there are machines that catch the waves and make them into electricity, This is the base of wave power.
More than 70% of the earth's surface is covered by oceans which contain two types of energy.
-mechanical energy from waves and tides
-Thermal energy from solar radiations falling on the ocean's surface making them the world's largest solar collectors
We first tried using wave energy in 1890.
In 2008, the first experimental wave farm was opened in Portugal, in the Aguçadoura Wave Park.
The major competitor of wave power is offshore wind power.
We started with the ideas for wave power when we discovered that fossil fuels were running out, like we started thinking for other ways to get energy.
The devices we use to get energy out of waves are called: Wave Energy Convertors (WEC)
Where can you find plants of this source and why? we can find plants in: UK, Ireland-Canada-Scotland,UK (Scotland),Australia,USA,Belgium,Scotland,Sweden,UK (Scots-Irish),UK (Scottish),Israel,Denmark,Finland. Because the wave power is the easiest energy to do
Where can it be used?
Can it be used in the Netherlands?
Yes, it can be used in the Netherlands along the coast because the tide is often quite high along the coast.
Is it currently used in the Netherlands?
No, it is currently not used in the Netherlands, but they are busy to develop it, So it will probably be there in the future.
Can it be used in Spain?
Yes, it can also be used in Spain because the waves are pretty high and strong.
Is it currently used in Spain?
Yes, in Spain the cities Sontana and Motrico are using the OWC method, OWC: Oscillating Water Collumns, see: Different methods: OWC
1. OWC: Oscillating Water Collumns: An Oscillating Water Collumn uses a large volume of moving water as a piston in a cyllinder, Air is forced out as a wave rises and fresh air is drawn in as the wave falls. This movement of air turns on a weir turbine at the top of the cyllinder.
2. Pelamis: A long hinged tube lays on the water, the waves go up and down and the hinges go up and down and produce energy, that energy is sent to a plant at the coast.
3. CETO: CETO is a wave energy that converts waves into energy and freshwater.
4. Limpet: The waves go into a hollow container which is open to the sea. This compresses and calms the air column into a collector in a similar way to how a pump works. The power plant "breathes" in and out. The pressure difference is then turned into energy.
5. Oyster Wave Energy Device: The Oyster is a hydro-electric wave energy device that uses the motion of ocean waves to generate electricity.
What is the effect on the environment?: It is a very clean way of getting electricity, because it doesn't release any Carbon Dioxide or some other gas that is bad for the environment. but it is also very bad because the fish can get stuck in the machine and even get killed. It also makes a very lot of noise. Our conclusion is that we should use it even though we know it is bad for fish, because we could make restricted areas for it and then just put it far away from the land so the disadvantages are gone.
So this would take in a lot of space and you can't just place it anywhere. It would also be very dangerous for Ships, Divers and Swimmers.
how does it work? well you have several ways to generate energy with waves one of them, works like a swimming pool reversed device
-in a swimming pool air is blown in and out of the chamber beside the pool , wich maks the water outside bob up and down, causing waves. at wave power station, the waves arriving cause the water in the chamber to rise and fall, wich means that the air is forced in and out of the hole in the top of the chamber. when the waves go down air comes in the chamber and then the waves come and push the air trough the generator then in the generator something turns around just like in an dinamo and that profides energy and when the wave goes down the air goes back in the chamber because of diffusion and the generator works just the same therefor its very nice to produce energy.
-in an oyster wave energy device the action of waves moves the device, pumping hydraulic fluid to a shore station to drive the generator. it goes from left to right all the time so he can produce energy, when the device does that it also needs a bit energy therefor the energy the oyster produces and goed to the shore station their is an electric wire to the oyster to prefend energy so he can move from left to right
where can you find "plants" (=fabrieken)" of this source and why? -Spain -Portugal -England -Scotland -Australia -Finland -United states of America -Belgium -Denmark -Ireland -Sweden -Canada
why? here are 5 reasons why we use wave energy:
1. Tidal and wave energy is predictable one of the biggest wave energy advantages is that this alternetive energy source is predictable and that is not true of most alternetive sources. the wave continue to form and move and severe weather in the ocean only increases the energy potential of the waves
2. It is a renewable soure of power one of the advantages of wave energy is that it is completely renewable and sustainable, with no effort made on the part of humans to make sure this cycle continiues. there is enough power in the oceans of the world toopwer the globe many times over each year.
3. no damage during tidal and wave energy recovery wave energy advantages include the fact that recovering this power does not cause massive damage to the earth. Recovering fossil fuels can be very damaging , and leave large holes or craters and other damage to the land. Capturing the movement of the ocean and using it does not damage the surrounding areas
4. Reduce pollution and greenhouse gas emissions Less pollution and greenhous gas reduction is one of the most important advantages of wave energy. this power source does not release any particulates or greenhouse gases wich contribute to smoge and global warming.
5. Better national security and a domestic energy supply wave energy advantages include those to national security and the energy supply. With power from the ocean there is no need to rely on foreign supplies of fossil fuels, or to experience price fluctuations due the global concerns. This source can be utilized domestically instead.
we working on the project