Hydroelectric power 2012

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Presentation 5th October 2012

"20121005_NLenES_Project_06_Hidro.JPG"

Lidia L T‎

Spanish student 1

Where's your work??

Moises de la P‎

                                                                        Hydroelectricity

Hydroelectricity is the term referring to electricity generated by hydropower; the production of electrical power through the use of the gravitational force of falling or flowing water. It is the most widely used form of renewable energy, accounting for 16 percent of global electricity consumption, and 3,427 terawatt-hours of electricity production in 2010, which continues the rapid rate of increase experienced between 2003 and 2009.[1]

The cost of hydroelectricity is relatively low, making it a competitive source of renewable electricity. The average cost of electricity from a hydro plant larger than 10 megawatts is 3 to 5 U.S. cents per kilowatt-hour.[1] Hydro is also a flexible source of electricity since plants can be ramped up and down very quickly to adapt to changing energy demands. However, damming interrupts the flow of rivers and can harm local ecosystems, and building large dams and reservoirs often involves displacing people and wildlife.[1] Once a hydroelectric complex is constructed, the project produces no direct waste, and has a considerably lower output level of the greenhouse gas carbon dioxide (CO2) than fossil fuel powered energy plants.[2]Hydroelectricity is the term referring to electricity generated by hydropower; the production of electrical power through the use of the gravitational force of falling or flowing water. It is the most widely used form of renewable energy, accounting for 16 percent of global electricity consumption, and 3,427 terawatt-hours of electricity production in 2010, which continues the rapid rate of increase experienced between 2003 and 2009.[1] Hydropower is produced in 150 countries, with the Asia-Pacific region generating 32 percent of global hydropower in 2010. China is the largest hydroelectricity producer, with 721 terawatt-hours of production in 2010, representing around 17 percent of domestic electricity use. There are now three hydroelectricity plants larger than 10 GW: the Three Gorges Dam in China, Itaipu Dam in Brazil, and Guri Dam in Venezuela.[1] Copy paste? Please tell it in your own words --L.Doolaard (talk) 23:24, 3 October 2012 (CEST)

I found this when i was working on my part... it was found on the page of his name --NL Djordy (talk) 21:35, 3 October 2012 (CEST)

Djordy G

Hello people this is my first contribution to the page of Hydroelectric Power, everyone from our group needed to make a part for an essay with 2 or 3 questions. My questions are:

  • Is it expensive?
  • What are the effects on the environment?


The first question I will answer is: Is it expensive?

Yes it is very expensive because you first need to cut down the trees and remove the rocks on the place you want to build the dam to hold the water. The dam needs to be very big and strong because it needs to hold a lot of water so you need a lot of stone and that can be very expensive. You also need a lot of workers to build the dam. You also need to build turbines to power up the generators. Turbines and generators are both very expensive... If you want to build a dam that produces hydroelectric power you need to have millions of Euros (or Dollars). You can't tell the cost because some dams are larger or smaller small dams cost less and big dams cost more, but it always will cost about 250000 euros.

The second question: What are the effects on the environment?

Building a dam in an valley or lake is bad for the nature because the water will rise and that can kill animals or destroy plants. So it is bad for the nature around the dam. As I mentioned before building a dam requires a lot of stone so you need to have a lot of trucks that will pollute the air so that is bad for the environment. But a hydroelectric plant will produce energy the whole day without polluting the air. A hydroelectric plant is more reliable than solar panels or wind power because that dams are built in a way the water always flows, the sun doesn't always shine so solar panels don't always work, sometimes there is no wind so wind power is not very reliable. People will need to buy a new house and move their properties that will pollute the air. So Hydroelectric Power is good for the environment if it is working, but building it is bad for the environment...

This is the contribution for the Hydroelectric Power essay...

Naomi V‎

HYDROELECTRIC POWER

Introduction

We are going to tell you a bit about hydroelectric power. Al of use answer some questions;

- How is electricity generated with help of your energy source?

- Where can you find “electricity generating plants” of this source and why?

- Can it be used in the Netherlands or other countries in Europe, why?/why not?

- Is it expensive?

- What are the effects on the environment?

- What are the advantages and disadvantages of generating electricity with this energy source?

- Is it sustainable?

How is electricity generated with help of your energy source?

First the water is stopped by a dam. On the bottom part of the dam, water flows out with a high speed because there is a lot of pressure on it. the water pusses the turbines so the turbines turn very fast, the turbines drive on generators. A generator is like a big dynamo, there is a big magnet in it and it turns very fast, that`s the way a generator produces electric power. the electric power goes to the powerhouses and then through the power lines to the houses. there is only one big problem: the dams are very expensive to build and a dam does effect the height of the water, so it effects the nature and that is mostly not good.

Where can you find “electricity generating plants” of this source and why?

You can find this source in countries with rivers and seas which have high sides because the dam has to stop the water flowing. but if you stop the water at a river and it doesn't have high sides, the river will overflow.

Can it be used in the Netherlands or other countries, why?/ why not?

This source of generate energy can be used in the Netherlands and in Spain because there are rivers with high sides and there is sea. if you have a river or sea you can build a dam in it, and if you build turbines and generators in the dam, it can produce energy. like the Oosterscheldekering in the Netherlands in province Zeeland.

Is it expensive?

Yes it is very expensive because you first need to cut down the trees and remove the rocks on the place you want to build the dam to hold the water. The dam needs to be very big and strong because it needs to hold a lot of water so you need a lot of stone and that can be very expensive. You also need a lot of workers to build the dam. You also need to build turbines to power up the generators. Turbines and generators are both very expensive... If you want to build a dam that produces hydroelectric power you need to have millions of Euros (or Dollars). You can’t tell the cost because some dams are larger or smaller small dams cost less and big dams cost more, but it always will cost about 250000 euros.

What are the effects on the environment?

Building a dam in an valley or lake is bad for the nature because the water will rise and that can kill animals or destroy plants. So it is bad for the nature around the dam. As I mentioned before building a dam requires a lot of stone so you need to have a lot of trucks that will pollute the air so that is bad for the environment. But a hydroelectric plant will produce energy the whole day without polluting the air. A hydroelectric plant is more reliable than solar panels or wind power because that dams are built in a way the water always flows, the sun doesn't always shine so solar panels don’t always work, sometimes there is no wind so wind power is not very reliable. People will need to buy a new house and move their properties that will pollute the air. So Hydroelectric Power is good for the environment if it is working, but building it is bad for the environment...

What are the advantages and the disadvantages of generating electricity with this energy source?

There are a lot of advantages in hydropower. For example; you don´t get pollution from it and you don´t need a lot of employees. But it has also a lot of disadvantages, such as: The dams are very expensive to build, it is bad for the nature and it depending on the precipitation. There are a lot more advantages and disadvantages, but I think the most important is that hydroelectric power doesn´t damage the ozon layer.

Is it suitable?

Electricity is good because water is all around us. This means that we do not need to change the entire landscape dramatically. Next we have the fact that it is cheaper due to the fact that at one time there are very little personnel on the floor resulting in lower costs for the customers. Now I look at the structure of the dams they use. The dams are strong and some built hundreds of years ago are still in use today. There are also low emissions, however, the emissions are only from the building process. Finally I turn to how much power hydro-electricity makes. With the amount of dams we have today we could power the world two times over! And for all those tax payers and people that want to keep their money, going to hydroelectricity is a very good decision to make.

Conclusion

Hydroelectric power is a very good source of energy because it is good for the environment, water is all around us and it is reliable, So we thing that Hydroelectric power is a good source of energy for the Netherlands and Spain.

Teun Joris P T‎

Hydroelectric power is a good source of energy, because it`s good for the environment and it`s much more reliable than wind or sunlight energy because the water always flow and the sun or the wind can be away.

How is the electricity generated?:

first the water is stopped by a dam. On the bottom part of the dam, water flows out with a high speed because there is a lot of pressure on it. the water pusses the turbines so the turbines turn very fast, the turbines drive on generators. A generator is like a big dynamo, there is a big magnet in it and it turns very fast, that`s the way a generator produces electric power. the electric power goes to the powerhouses and then through the power lines to the houses. there is only one big problem: the dams are very expensive to build and a dam does effect the height of the water, so it effects the nature and that is mostly not good.

Where can you find this source and why?: you can find this source in countries with rivers and seas which have high sides because the dam has to stop the water flowing. but if you stop the water at a river and it doesn't have high sides, the river will overflow. hydroelectric power is a good source of energy, because it`s good for the environment and it`s much more reliable than wind or sunlight energy because the water always flow and the sun or the wind can be away. how is the electricity generated: first the water is stopped by a dam. On the bottom part of the dam, water flows out with a high speed because there is a lot of pressure on it. the water pusses the turbines so the turbines turn very fast, the turbines drive on generators. A generator is like a big dynamo, there is a big magnet in it and it turns very fast, that`s the way a generator produces electric power. the electric power goes to the powerhouses and then through the power lines to the houses. there is only one big problem: the dams are very expensive to build and a dam does effect the height of the water, so it effects the nature and that is mostly not good.

New part:

Where can you find this source and why?:

you can find this source in countries with rivers and seas which have high sides because the dam has to stop the water flowing. but if you stop the water at a river and it doesn't have high sides, the river will overflow. can it be used in the Netherlands or Spain, why/why not: this source of generate energy can be used in the Netherlands and in Spain because there are rivers with high sides and there is sea. if you have a river or sea you can build a dam in it, and if you build turbines and generators in the dam, it can produce energy. like the Oosterscheldekering in the Netherlands in province Zeeland. Can it be used in the Netherlands or Spain, why/why not?: this source of generate energy can be used in the Netherlands and in Spain because there are rivers with high sides and there is sea. if you have a river or sea you can build a dam in it, and if you build turbines and generators in the dam, it can produce energy. like the Oosterscheldekering in Holland in province Zeeland.

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