Hydroelectric power 2014

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Comment on group work

You still didn´t send me the presentation! You did some items more than once. I miss information about the use in Spain.

User:ES-Pedro

Water can be stored in the dam until it slides down in to the tube.

Hydro-electric power stations can increase to full power very quickly, unlike other power stations. because it is just a water stream so if you drop the water it will be on full speed quikly.

Electricity can be generated constantly. And it is extremely good for the environment because you use water and there are almost no waste products produced. Nature must be protected energy like light

Comment of Ms. Doolaard

Which question are you trying to answer? The information is too general.

User:ES-Pablo

Advantages OnceOnce the dam is built, the energy is virtually free.

No waste or pollution produced.

Much more reliable than wind, solar or wave power.

Water can be stored above the dam ready to cope with peaks in demand.

Hydro-electric power stations can increase to full power very quickly, unlike other power stations.

Electricity can be generated constantly. DISADVANTAGES: The dams are very expensive to build. However, many dams are also used for flood control or irrigation, so building costs can be shared. 

Building a large dam will flood a very large area upstream, causing problems for animals that used to live there. 

Finding a suitable site can be difficult - the impact on residents and the environment may be unacceptable.

Water quality and quantity downstream can be affected, which can have an impact on plant life.

Comment of Ms. Doolaard

This are not the disadvantages. The second part is. Is it renewable? We put it in wrong

User:ES-Vanessa

Hydroelectric.jpg

Conclusion:

Hydropower is the cheapest way to generate electricity today. No other energy source, renewable or nonrenewable, can match it. Producing electricity from hydropower is cheap because, once a dam has been built and the equipment installed, the energy source-flowing water-is free.

Comment of Ms. Doolaard

Try to be more convincing in your conclusion.

User:NL-Jelmer

Everyone thinks that Spain is dry, but it isn't, it has much rivers, and the most energy at second comes from hydroelectricity. The use of hydroelectricity is still ricing, getting more and more important. There is one dam in catalonia, the talarn dam, a Talarn dam, a huge building, that produces hydroelectricity. The handy thinks is that If you building a dam, you get a big resevoir (or more) and then you make a big area fertile, so there there can be farming, and you always have water there.

Comment of Ms. Doolaard

This is correct.

User:NL-Sander

Introduction:

Hydroelectric power is an extremely flexible technology to generate power. The basic principe of hydropower is that if water can be piped from a certain level to a lower level, then the resulting water pressure can be used to do work. If the water pressure is allowed to move a kind of dynamo then that movement makes power out of the energy of the water. It then can be used to drive an electricity generator, a grinding mill or some other useful things. Hydroelectric power, or hydroelectricity, is basically electrical energy that has been generated using natural forces such as gravity or flowing water. It's usually produced by dams, because dams can store and direct large volumes of water. Hydroelectric power is becoming increasingly popular. Dams can generate electricity because they contain special mechanisms designed to take the energy in flowing water and turn it into electrical power. A power source is used to spin a turbine—basically a propeller—which in turn spins a metal thing, forming the electricity to the generator that produces and stores electricity. The power source, in the case of hydropower, is water itself. When water moves a turbine, the turbine spins, and then electricity is produced


flexible-principe-certain level-lower level-dynamo

Comment of Ms. Doolaard

Use a picture to explain. Use your own words.

User:NL-Olivier

how?


the energy is mostly waked up by falling water. How does it work?

Hydro-Electric Power Generation.JPG

Typical hydroelectric powerplant water stored in the dam. go´s down . the turbine starts spinning. power . transformer (power – machinical energy). power go´s to power lines.



Hydroelectricity means getting energy from flowing or falling water. A dam is built to trap water, usually in a valley where there is an existing lake. Water is allowed to flow through tunnels in the dam, to turn turbines(which look a little like an ammonite shell: a wheel with bucket-shaped blades around the rim. Water "blows" them round, and they drive generators in hydro-electric power stations). Noticed is that the dam is much thicker at the bottom then the top, because the water pressure increases how deeper you go down. Hydroelectric power stations can produce a great deal of power very cheaply. 4-1-3-hydro.gif

information about the picture: reservoir: Dams create reservoirs (a large “lake” of calm water) behind them, which can be used for recreation, wildlife sanctuaries (were animals live), and sources of drinking water. Intake: water goes through here, flowing to the turbine (1). turbine: like a wheel with paddles, where water comes through so it spins (1). Generator: is attached to the turbine, producing electricity when the turbine spins (2).

Comment of Ms. Doolaard

The generator transforms movement into electricity.

User:NL-Mees

Intoduction: All over the world we use electricity. It´s mainly generated by oil or coal. But the problem with those sources is that it will run out in about 50 years. And also, when we burn fossils, like oil or coal, carbon dioxide is released into the air. That is one of the causes of global warming. That´s why scientists are looking for other energy sources. Our group is going to talk about hydroelectic power. Hydroelectricity means getting energy from flowing or falling water. And it´s a very good source because it´s very flexible and reneweble. And it´s very cheap, no other source can match it though it is reneweble. Because, though it is very expensive to build, once it´s build the source, flowing/falling water, is free. We´re going to give some main information like: - how it works - where you can find ´plants´ (factory´s)? - can it be used in the Netherlands/Spain? - advantages + disadvantages

Comment of Ms. Doolaard

This is correct.

User:ES-Raul

Can it be used in the Netherlands, why?/why not? Despite the fact that The Netherlands are a (very) flat country, hydropower does contribute to the Dutch energy production. This contribution originates from centuries old watermills in Limburg and Twente, to the modern hydroplants in the rivers Rhine and Maas.

how it work around $300,000,000 coststo build dam

Chief-Joseph-Dam.jpg

Comment of Ms. Doolaard

Use your own words. Is it used in Spain?