No longer splitting hairs over splitting atoms? yazısına yapılan yorumlar http://www.fizikportali.com/2008/08/no-longer-splitting-hairs-over-splitting-atoms/ Fizik Eğitim ve Haber Portalı Tue, 07 Feb 2012 20:37:37 +0000 hourly 1 http://wordpress.org/?v=3.3.1 Yazar: mehmet nuri yesilgoz http://www.fizikportali.com/2008/08/no-longer-splitting-hairs-over-splitting-atoms/comment-page-1/#comment-3913 mehmet nuri yesilgoz Sat, 20 Feb 2010 04:08:59 +0000 http://www.fizikportali.com/?p=351#comment-3913 We've used the wind as an energy source for a long time. The Babylonians and Chinese were using wind power to pump water for irrigating crops 4,000 years ago, and sailing boats were around long before that. Wind power was used in the Middle Ages, in Europe, to grind corn, which is where the term "windmill" comes from The Sun heats our atmosphere unevenly, so some patches become warmer than others. These warm patches of air rise, other air blows in to replace them - and we feel a wind blowing. We can use the energy in the wind by building a tall tower, with a large propellor on the top. The wind blows the propeller round, which turns a generator to produce electricity 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 propellors are large, to extract energy from the largest possible volume of air. The blades can be angled to "fine" or "coarse" pitch, to cope with varying wind speeds, and the generator and propellor can turn to face the wind wherever it comes from. Some designs use vertical turbines, which don't need to be turned to face the wind. 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. We’ve used the wind as an energy source for a long time.
The Babylonians and Chinese were using wind power to pump water for irrigating crops 4,000 years ago, and sailing boats were around long before that.
Wind power was used in the Middle Ages, in Europe, to grind corn, which is where the term “windmill” comes from
The Sun heats our atmosphere unevenly, so some patches become warmer than others.
These warm patches of air rise, other air blows in to replace them – and we feel a wind blowing.
We can use the energy in the wind by building a tall tower, with a large propellor on the top.
The wind blows the propeller round, which turns a generator to produce electricity
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 propellors are large, to extract energy from the largest possible volume of air. The blades can be angled to “fine” or “coarse” pitch, to cope with varying wind speeds, and the generator and propellor can turn to face the wind wherever it comes from. Some designs use vertical turbines, which don’t need to be turned to face the wind.
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.

]]> Yazar: M. Simon http://www.fizikportali.com/2008/08/no-longer-splitting-hairs-over-splitting-atoms/comment-page-1/#comment-758 M. Simon Wed, 13 Aug 2008 14:02:06 +0000 http://www.fizikportali.com/?p=351#comment-758 You might like this: <a href="http://powerandcontrol.blogspot.com/2008/06/fusion-update-13-june-008.html" rel="nofollow">Fusion Report 13 June 008</a> You might like this:

Fusion Report 13 June 008

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