Wind power 2014
how does it work?
the sun heats our atmosphere unevenly, so some areas are warmer than others. these warm areas of air rise and other air blows to rplace it and we feel wind blowing. we can use the enegy in the wind by buidin a tall tower
Wind power has been used as long as humans have put sails into the wind.
The Babylonians and Chinese were using wind power to pump water for irrigating crops and sailing boats were around long before that. As cultures harnessed the power that wind offered, the use of windmills. Windmills were used extensively in food production.
With the development of electric power, wind power found new applications in lighting buildings remote from centrally-generated power. Throughout the 20th century parallel paths developed small wind plants suitable for farms or residences.
As the Earth is heated by the Sun, some regions become warmer than others. The air in the warm regions rises.
It is a renewable source of energy, which means that it will not run out. This means that they help reduce global warming. As one of the windiest countries in Europe, it is perfect for our climate. The land between the turbines can be used for farming. Wind turbines can be used to supply energy in remote places. There is no need to dig underground or drill for the resource; therefore there is less pollution of the soil.
Wind energy has been the first source of electrical generation in Spain in 2013, for the first time in history. Spain is the fourth country in the world in terms of installed wind power after the US, Germany and China.
Remarkable new figures from Spain's grid operator have revealed that greenhouse gas emissions from the country's power sector are likely to have fallen 23.1% last year, as power generation from wind farms and hydroelectric plants soared.
Red Eléctrica de España released a preliminary report on the country's power system late last month, revealing that for "the first time ever, [wind power] contributed most to the annual electricity demand coverage". According to the figures, wind turbines met 21.1% of electricity demand on the Spanish peninsular, narrowly beating the region's fleet of nuclear reactors, which provided 21% of power.
The wind is a renewable energy source. Wind turbines can convert energy into electricity, then the human advantage. The wind power is very powerful.
The wind is a renewable energy source.
- How does it work? Explain how electricity is generated with help of your energy source.
- Where can you find “plants” of this source and why?
- Can it be used in the Netherlands or in Spain, why?/why not?
- What is the effect on the environment?
wind energy in the Netherlands
old fashion wind mills
The first windmills were invented in antiquity, but it was the Dutch who really hit it off with this wooden giant. In a flat country, where the wind always blows, windmills sprouted from the ground like mushrooms. They were used to mill, saw, pump and press. The production of boards, paint, oil and paper, as well as bread and mustard – among other things – depended on windmills and wind. In addition, windmills were used to pump the water out of lakes and to keep reclaimed land dry. Once a country of 10,000 windmills, Holland now has over 1,000 historic vertical mills, more than any other country in the world. Vertical mills come in a variety of shapes, from the post mill, hollow post mill, tower mill, and the smock mill. All of these are really a variation on the post mill, where a post stands vertically and its attached sails can be turned to face the direction of the wind. The other types of vertical windmills expand the center from a simple post to large interior spaces where the miller can live.
Wind energy has been used in Holland since the inception of the country. Windmills have harnessed the power of the wind to drain the wetlands, saw logs for building, grind grain for food, and many other industrial purposes. This has not changed as time progressed, though the type of wind power used has certainly changed. No longer large wooden or stone windmills but modern wind turbines spin to create the electricity that a modern country like Holland needs.
Where can you find “plants” of this source and why?
- The best places for wind farms are in coastal areas, at the tops of rounded hills, open plains and gaps in mountains - places where the wind is strong and reliable. Some are offshore.
To be worthwhile, you need an average wind speed of around 25 km/h. Most wind farms in the UK are in Cornwall or Wales.
- Isolated places such as farms may have their own wind generators. In California, several "wind farms" supply electricity to homes around Los Angeles.
The towers are tall, to get the propellors as high as possible, up to where the wind is stronger. This means that the land beneath can still be used for farming.
- As of 2011, the Roscou Wind Farm in the United States is the world's largest wind farm.
- The biggest wind farm in the world right now is Alta (Oak Creek-Mojave) also in the United States.
What is the effect of wind power?
- Wind is free
- doesnt produce any wastes
- The land where the wind propelors are placed on, can usually still be used for farming.
- Wind farms can be tourist attractions.
- It is a good method of supplying energy to remote areas.
- The wind is not always predictable - some days there is no wind so theres no power
- areas for wind farms are often near the coast, where land is expensive.
- Some people think that placing these wind towers doesnt look nice.
- Can kill birds – because some birds like strong winds( but people dont tend to build them on the migration routes
- Can affect television reception if you live nearby.
- Can be noisy.
- People have found evidence of bird and bat deaths from the wind poles due to changes in air pressure caused by the spinning turbines, as well as habitat disruption.