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Wave Power Sci4

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Nick Bellinson

on 27 February 2013

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Transcript of Wave Power Sci4

By: Cynthia Jia, Sarah Samosiuk, Sam Greenberg, and Nick Bellinson Wave Power How does wave energy work? How can wave energy be used? Does wave energy impose any negative impacts on the environment? What are some examples of
current wave power? What are some positive environmental impacts associated with wave energy? Is wave power widely accepted today? Do the costs of wave power prohibit its use? Are any locations better for wave power than others? How is science
applied to wave power? How effective is wave energy in solving the global energy problems? How does wave energy have implications for moral, ethical, social, economic, political, cultural, and environmental factors? Sources For most wave power systems, the movement of the waves is used to spin a turbine in some way, which then spins a generator for electricity.

Some methods include hydraulics as well. It could also power coastal buildings like lighthouses. Oscillating Water Column The Pelamis The Wavebob Salter's Duck CETO and the Oyster An oscillating water column (OWC) uses the motion of waves to push air through a turbine. The pelamis is named after a sea snake, because of its long, bending appearance. It is made of five huge tube segments linked together. When the waves hit it, it moves and bends at the joints. This is the Islay limpet (land installed marine powered energy transformer) on the Scottish island Islay. This then drives hydraulic rams, which power a generator. in 2008, it was installed in Aguçadoura, Portugal. The wavebob was developed in Ireland. It's made to survive extremely rough water, since that's what Ireland's waves are like. It's made of two parts that bob on the waves at different speeds, since their densities are not the same. This movement is used to generate electricity. Salter’s duck was developed by Stephen Salter, a professor at the University of Edinburgh. Some types of wave power that are on land also help to reduce erosion on the landscape. http://www.brightknowledge.org/knowledge-bank/geography-and-environment/features-and-resources/copy_of_wave-energy


http://www.economist.com/node/11482565 Wave power is becoming more common, with projects popping up all over the map. That's a pretty good indication that today's society accepts wave power as a new possible energy source. Wave power has an extremely high potential for the future, but for now the costs of widespread production and installation are just too much for some governments to provide funding. Considering the cost to set it up, it would take an incredibly long time to make the money back, even though once it is installed, wave power is free. Hopefully with time the costs will lower, and its use will not be prohibited by money like it is today. Therefore, the windier bodies of water would be most suitable for wave power. Australia and the British Isles have lots of waves, as well as places in Canada such as British Columbia, and in Greenland. Also, for the types of wave power that require a coast, like the limpet, the better spots would be places that have an oceanic coastline. Moral Many wave power systems are very large, like the pelamis. This is very difficult to make and transport, as well as difficult to install. It takes a lot of planning and engineering in order to carry it out successfully. Wave power can be quite effective where it is available; when the pelamis was in use, one machine could power 500 homes. Waves carry tremendous power that can be used for electricity. However, in many places, constant waves are not available. Wave Dragon CETO is named after a sea goddess. It is attached to the sea floor, and as waves go by, they cause the floating portion to sway back and forth. This pumps highly pressurized sea water through turbines located at an on-shore plant. CETO is currently being used in Australia. There are also projects in Ireland, Bermuda, and British Columbia. The oyster works much like CETO. They are currently used in Scotland, and potentially Ireland or the US in the future. The Wave Dragon uses a method called "overtopping". Water flows up a ramp into a reservoir.

The water then falls down to a second reservoir, passing through a turbine as it goes. It's located in Northern Denmark. Although this type of energy is renewable, there are some possible environmental issues associated with its use. The marine ecosystem could potentially be affected by the installation of these devices. Some devices also contain hydraulic fluids that could be released into the water accidentally. There is also a possibility that large boats could collide with the wave energy generators. This could lead to spills of chemicals and other
pollutants into the water. No greenhouse gasses are emitted into the atmosphere, because this type of renewable energy uses waves and air to generate electricity. However, in some cases, wave energy converters are close to shore and can intrude on someone's ocean view. Because of this, people sometimes dislike them. Many are also quite loud, but the sound of the waves can cover that. The best functioning wave power equipment ran at about 7.5 cents per kilowatt-hour But in all cases, the energy from a wave's movement is converted into electricity. Wave power can supply homes near water sources with electricity. With enough wave structures, big cities near the sea could use wave energy to provide electricity. It even has to potential to power a whole small island. Well, obviously in order for there to be wave power, there needs to be water and wind to make waves. So yes, there are places that are better than others. There are so many varieties of wave power converters, that some don't need a coastline to install the equipment--but there needs to be actual waves for it to work. Science is applied to wave power because the energy from the waves must somehow be transferred into a useable energy source and science makes that possible. Science is also used to allow the energy to travel from one spot to another, such as from the wave energy converter to somewhere on land or somewhere far offshore. Without science, how are humans supposed to know that there is even any harvestable energy in these waves? Scientists have to come up with these ways to convert wave energy into usable electricity. Not just anybody can think of a way; although many of these concepts may seem simple, you need a scientific mind to realize them and put them into action. Although wave power is a huge initial investment, once it is installed, it can run on very little money--waves are free! This could be hugely beneficial; we wouldn't have to spend so much money on fossil fuels. Ethical Cultural Currently, there are many different types of mechanisms that harvest wave energy. However, Salter's duck couldn't continue development. Funding was cut in favor of nuclear energy. Oof Many wave power devices are installed on the seafloor, and this could affect habitats found there. (In some cases, however, the wave energy converters make new homes for fish and other marine life.) Because of this, our atmosphere could become much cleaner, and we could slow global warming. Since it is renewable, there is not a lot of maintenance or energy that has to go into keeping it running, either. Political Wave energy is part of the broad topic of alternative energy. Recently, alternative energy has been a huge political issue, such as in the Millennium Development Goals. Even though wave energy costs so much to invest into, in the long run wave energy would save us a lot of money and natural resources. MY OCEAN VIEWWWW!! NOOO!!! Some people also think that it is too expensive and unreliable to invest in now. Research is still going on. The science of gravity and also the science of transferring potential energy into electricity is used in the process of wave energy. What else is there to know about wave energy? Here's a map that shows where wave power is most effective. Economic Environmental Wave energy can be technically considered a type of wind energy, and sun energy. The sun heats up the atmosphere, creating wind currents. The wind then creates waves by blowing the top of the water. That makes the waves that are used in wave energy. And, since water is so much denser than air, each wave can hold many times more energy than a gust of wind. Wave energy can be good and bad morally. For the most part, wave energy is a clean and very easy to keep up after being properly installed. It makes people feel good inside to save money while helping the environment, and makes them feel like they are doing something right.

But when it's not installed correctly, many things can go wrong, such as chemicals being let out into the water, harming wildlife, and less energy harnessed from improper installation. This would make people feel sad because they spent tax money on things that harm the environment and don't save them money, like they are doing something wrong.
Unless something goes wrong, wave power is great for the environment. Besides the small chance of marine life disturbance or hydraulic leakage, wave power is renewable energy, and does not produce greenhouse gas. It provides a clean alternative to fossil fuels. Energy is a concern for all governments; how will a country run without energy? Because of this, renewable energy is a very important topic in politics. It could solve many problems in our country. ”With only 2 percent of the world’s oil reserves, oil isn’t enough. This country needs an all-out, all-of-the-above strategy that develops every available source of American energy. A strategy that’s cleaner, cheaper, and full of new jobs.” Some people may think wave power is unethical because of its installation on the sea floor; this could disturb animals that live there, and interrupt the natural habitat.

However, this is not known for sure,especially with few in use currently.

Additionally, it is even possible that these wave energy converters provide a sort of new home for fish.

So really, there aren't many ethical concerns with wave power. If anything, it will prevent us from destroying the world further. I suppose you could say that the stereotypical American is "needy" or "greedy", maybe "spoiled". In some cases, this can be quite accurate. Often, most do not consider just how much energy they are using or how they are impacting the environment. With wave energy and other renewable sources, we are breaking out of that stereotype. We are actually thinking about how we should treat our surroundings, and how it will affect our future. WAVE POWER KILLS ANIMALS!! In society, many people want renewable energy like wave power. However, sometimes wave energy converters may be intrusive visually; the pelamis sticks out of the water like a snake and the wavebob is this huge yellow bobbing thing. In some cases, they are far out enough to be ignored. But in others, they are noticeable enough for people to dislike them. So sometimes, society does not accept it. But, if renewable energy overtakes most fossil fuels, we can eventually clear up the smog and dirty air that clogs up some of the biggest cities on Earth. This could make things much better for everyone living in that society. Additionally, very few wave power farms have been installed compared to wind or solar; it is more expensive and difficult to set up. Although an island run exclusively on wave power is a potential option, it is just too risky-you can't "put all your eggs in one basket". As a result, wave energy has not made great contributions to reducing emissions and replacing fossil fuels globally just yet. But it may in the future. Aw. I wish I had some waves. > With just one disaster, it could be completely out of an energy source. http://www.cleanvideosearch.com/media/action/yt/watch?videoId=gcStpg3i5V8 http://www.cleanvideosearch.com/media/action/yt/watch?feature=player_embedded&v=F0mzrbfzUpM http://www.cleanvideosearch.com/media/action/yt/watch?videoId=slawyq4PXxE http://www.cleanvideosearch.com/media/action/yt/watch?videoId=Mu9wYj07UGc "Vattenfall and Wavebob develop wave power" "Aquamarine Power - Oyster 1 wave power demonstration device - How It Works" It has a huge flap that moves in the waves, and sends pressurized water to an on-shore turbine. Additionally, there are possible new jobs that come with new wave energy plants.
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