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Wind Power


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An introduction to how wind power works, what its advantages and disadvantages are, and where it is being used the most.

Published in: Technology, Business
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  • We are Power Transmission Tower, Wind Turbine Tower manufacturer, hope to become your reliable supplier.

    Qingdao Wuxiao Group Co., Ltd. was established in 1993, located in Jiaozhou Bay of Qingdao, which is also a large-scale comprehensive industrial group. Upholding the development concept of 'Revitalize the country by science and technology, return the country with industrial developments', through many years of development, the company now covers an area of over 600,000 square meters, owns total assets of RMB 1.38 billion, employs more than 2,000 staffs, annual production capacity can reach 300,000 tons. The company owns seven subsidiaries — Qingdao Wuxiao Tower Co., Ltd., Qingdao Wuxiao Pipe Making Co., Ltd., Qingdao Sanyu Mechanical & Electrical Manufacturing Co., Ltd., Qingdao Jiaheng New Energy Equipment Co., Ltd., Qingdao Wuxiao Logistics Co., Ltd., Suihua Wuxiao Electric Power Equipment Co., Ltd. and Inner Mongolia Sanxing Heavy Industries Co., Ltd.

    Our main products include:* steel towers and similar steel structures for power transmission, microwave communication, broadcasting, telecommunication and television purposes; land and offshore wind turbine tower; large wind turbine tower flanges and forging rings; large-diameter thick-wall straight-seam welded steel pipes etc.*

    We have a developed management system, and has aquired the certification of GB/T 19001-2008 idt ISO9001: 2008 standard, GB/T 24001-2004 idt ISO14001: 2004 standard and GB/T 28001-2001 idt OHSAS: 2001 standard. The company has obtained Transmission Steel Tower Production License, Broadcasting, Telecommunication Steel Tower and Mast Production License, Pressure Vessel Manufacturing License, Chinese Steel Structure Manufacturing Enterprise Qualification Certificate (Special Grade), Physical and Chemical Testing Certificate for Steel, Transmission and Transformation Tubular Structural Product Qualification Certificate, as well as a number of commendations and honorable certificates of various grades, which witness the company's continuous improvement in scientific and standardized processes. Over the years, the company has been contributing to the national power project construction, and has won high praises from clients. Qingdao Wuxiao Group Co., Ltd. returns every customer with enthusiastic attitude, excellent quality and considerate services. Adhering to the service tenet of 'making customers more satisfied', the company sincerely welcomes friends from all over the world for visit, idea-exchange and cooperation!

    Welcome to visit our company or scan our web site:

    Best Regards,


    Qingdao Wuxiao Group Co., Ltd.

    Add: No. 553, East Lanzhou Road, Jiaozhou Country, Qingdao City, Shandong Province, China

    Attn: Tom

    Tel: +86-532-81120580

    Fax: +86-532-82275396

    Mob: +86-15105325323

    Post code: 266300



    Skype: wuxiaogroupco
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  • The presentation is very informative. It tackles all the necessary information about wind energy that the public should know. Wind energy is the best energy renewable resources that we can take advantage of. It's clean because of its pure content. It can't harm anything so you know it's really safe. Wind turbines gives you free electricity which is advantageous to all of us. Risk free.
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Wind Power

  1. 1. An Introduction to Wind Energy Prepared for by Philip Woodard – 2009 – all rights reserved ©
  2. 2. The Basics <ul><li>Like old fashioned windmills, modern wind machines use blades to collect the wind’s kinetic energy </li></ul><ul><li>Basic design developed by Persians 800 A.D. </li></ul><ul><li>Early use to pump water and grind grain </li></ul><ul><li>As the wind flows over the wing- shaped blades, lift causes the blades to turn </li></ul><ul><li>The blades are connected to a drive shaft that turns an electric generator to produce electricity </li></ul>
  3. 3. The Basics – Part Two Large wind turbines generate enough electricity for 600 homes 3.1 Usually placed in high wind areas in tens and sometimes in hundreds Vertical windmills generate 50% more electricity than horizontal windmills
  4. 4. World Wind Energy At the end of 2007, worldwide capacity was 94.1 gigawatts About one percent of world-wide electricity Fivefold increase between 2000 and 2007 On one windy morning in March, 2009, Spain produced 40 percent of its electrical demand with wind Global wind capacity grew 29% in 2008, and U.S. surpassed Germany to lead world in generating wind power 4.1 Wind power produces about 1.5% of worldwide electricity use
  5. 5. World Wind Energy <ul><li>T housands of wind turbines currently in operation with a total capacity (2008) of 121,188 MW </li></ul><ul><li>Wind power in Europe accounts for 55% of the use </li></ul><ul><li>81% of wind power installations are in the US and Europe </li></ul><ul><li>The UK is building a 90 square mile (the “London Array”) offshore wind farm with 175 turbines producing 630 megawatts (MW) seven miles off the coast of Kent </li></ul><ul><ul><li>A Stage Two ups the plan to 341 turbines and 1 gigawatt (GW) of power, enough for a quarter of all the homes in Greater London and by far the biggest off shore development in the world 5.1 </li></ul></ul>
  6. 6. U.S. Wind Energy After two decades, U.S. wind industry hit 10,000 megawatt capacity mark in 2006 By 2008, capacity doubled again to 27,000 megawatts Enough electricity to serve 7 million American homes or power a fleet of more than 1 million plug-in hybrid vehicles Enough energy to replace 28.7 million tons of coal or 90 million barrels of oil About 42% of all the new power-producing capacity completed in 2008
  7. 7. History <ul><li>American Charles F. Brush was the first to produce electricity using a wind powered machine </li></ul><ul><li>Scotsman James Blyth received a UK patent in 1891 </li></ul><ul><li>Blyth's 33 foot high, cloth-sailed wind turbine was installed in the garden of his holiday cottage at Marykirk in Scotland to charge batteries and light his house </li></ul><ul><li>Blyth offered the surplus electricity to the people of Marykirk for lighting the main street </li></ul><ul><li>They turned down the offer as they thought electricity was “the work of the devil” </li></ul>
  8. 8. History – Part Two <ul><li>Large, utility-scale wind energy conversion systems were developed in the U.S.S.R. (1931) with a 100kW wind generator </li></ul><ul><li>Operated for about two years on the shore of the Caspian Sea </li></ul><ul><li>Experimental wind plants were also built in the United States, Denmark, France, Germany, and Great Britain from 1935-1970 </li></ul><ul><li>Largest was a 1.25 megawatt Smith-Putnam machine installed in Vermont in 1941 </li></ul><ul><ul><li>Horizontal-axis design featured a two-bladed, 175-foot diameter rotor oriented down-wind of the tower at a constant 28 RPM </li></ul></ul><ul><ul><li>Lasted by four years </li></ul></ul><ul><li>Denmark operated the 200 kW Gedser Mill wind turbine successfully until the early 1960s </li></ul>
  9. 9. Declining Costs <ul><li>Over the last 20 years, the cost of electricity from utility-scale wind systems has dropped by more than 80% </li></ul><ul><li>With the first utility-scale turbines, wind-generated electricity cost as much as 30 cents per kilowatt-hour </li></ul><ul><li>Current wind power plants generate electricity for less than 5 cents/kWh, competitive with new coal- or gas-fired power electricity </li></ul><ul><li>Governed by economy of scale: the larger machines are always more cost effective </li></ul><ul><li>2009 offshore project in the UK delayed because costs were running six times the cost of nuclear 8.1 </li></ul>
  10. 10. Three Cost Factors <ul><li>Size of the wind farm – larger means lower generating costs </li></ul><ul><li>Wind speed at the site – faster means lower generating costs </li></ul><ul><li>Cost of installing the turbines – cheaper means lower generating costs </li></ul>
  11. 11. Major Wind Users -- 2007 <ul><li>Denmark, Spain, and Portugal received almost 20% and Germany and Ireland over 7% of their power from wind </li></ul><ul><li>Minnesota and Iowa received almost 07% of their power from wind </li></ul><ul><li>At the end of 2008, the U.S. produced the most power from wind </li></ul><ul><li>43% of all new electricity generating capacity built in the EU in 2008 was wind energy: more than all other technologies including gas, coal and nuclear power </li></ul>
  12. 12. <ul><li>Denmark, Spain, and Portugal received almost 20% and Germany and Ireland over 7% of their power from wind </li></ul><ul><li>Minnesota and Iowa received almost 07% of their power from wind </li></ul><ul><li>At the end of 2008, the U.S. produced the most power from wind </li></ul>Leading Nations Using Wind 788 572 510 18 Sweden 805 745 496 17 Ireland 824 817 708 16 Australia 871 746 573 15 Greece 982 965 819 14 Austria 1,538 1,394 1,061 13 Japan 1,747 1,560 1,219 12 Netherlands 1,856 1,459 683 11 Canada 2,150 1,716 1,022 10 Portugal 2,389 1,963 1,332 9 United Kingdom 2,454 1,567 757 8 France 2,726 2,123 1,718 7 Italy 3,129 3,140 3,136 6 Denmark (& Faeroe Islands) 6,050 2,604 1,260 5 China 8,000 6,270 4,430 4 India 4,430 15,145 11,615 10,028 3 Spain 16,818 11,603 9,149 2 United States 22,247 20,622 18,415 1 Germany 2007 2006 2005 Nation 65 61 18 36 Hungary 66 48 23 35 Iran 70 36 6 34 Bulgaria 74 74 71 33 Costa Rica 87 88 3 32 Mexico 89 86 77 31 Ukraine 110 86 82 30 Finland 114 124 64 29 Morocco 116 50 28 28 Czech Republic 146 51 20 27 Turkey 191 173 98 26 South Korea 247 237 29 25 Brazil 276 153 83 24 Poland 282 188 104 23 Taiwan 287 193 167 22 Belgium 310 230 145 21 Egypt 322 171 169 20 New Zealand 333 314 267 19 Norway 2007 2006 2005 Nation
  13. 13. Wind Map of the U.S. Fair Good Excellent Outstanding Superb At the end of the third quarter of 2008, the states with the most cumulative wind power capacity installed are: Texas, with 6,297 MW; California, with 2,493 MW; Iowa, with 1,394 MW; Minnesota, with 1,377 MW; and Washington with 1,367 MW.
  14. 14. Location Location Location <ul><li>Wind speed increases with altitude and over open areas with no windbreaks </li></ul><ul><li>Good sites for wind plants are the tops of smooth, rounded hills, open plains or shorelines, and mountain gaps that produce wind funneling </li></ul><ul><li>Germany and the United States are the two leading producers of wind generated electricity </li></ul><ul><li>Denmark’s wind power produces approximately 20% of the country's electricity consumption </li></ul>
  15. 15. Utility Scale Wind Power – September 2008
  16. 16. Most Wind Power 2008
  17. 17. Fastest Growing Technology <ul><li>In 2008, Europe installed 20 new turbines every day 14.1 </li></ul><ul><li>Became the leading technology in Europe -- more wind power was installed in the EU in 2008 than any other electricity generating technology </li></ul>
  18. 18. Offshore Wind Farms 2008 <ul><li>Transporting large wind turbine components (tower sections, nacelles, and blades) is much easier over water than on land </li></ul><ul><li>Construction and maintenance costs per wind turbine are higher for offshore wind farms </li></ul><ul><li>Europe leads the world in offshore wind power, due to strong wind resources and shallow water in the North Sea and Baltic Sea </li></ul><ul><li>Denmark installed the first offshore wind farms, and for years was the world leader in offshore wind power </li></ul><ul><li>The United Kingdom took the lead in 2008 with 590 megawatts of installed </li></ul><ul><li>Population centers along coastlines in many parts of the world are close to offshore wind resources for reduced transmission costs </li></ul><ul><li>Holland’s 120MW Princess Amalia offshore wind farm features </li></ul><ul><ul><li>Cost was €383 million </li></ul></ul>
  19. 19. Consistency <ul><li>Wind energy comes in short bursts </li></ul><ul><li>In one study, half of the energy available arrived in just 15% of the operating time 11.1 </li></ul><ul><li>Wind energy is not as consistent as output from fuel-fired power plants </li></ul><ul><li>Thus, wind power is better as a fuel saver than as a capacity saver </li></ul><ul><li>When the wind doesn’t blow, other types of power plants must be used to fill in and make electricity </li></ul><ul><li>Stronger inter-regional transmission lines and more hydro storage would help with these consistency problems </li></ul>
  20. 20. Solar and Wind Synergy <ul><li>In areas where demand for electricity is higher in winter than in summer, wind and solar are complementary </li></ul><ul><li>High pressure areas tend to bring clear skies and low surface winds </li></ul><ul><li>Low pressure areas tend to be windier and cloudier </li></ul><ul><li>Solar energy typically peaks in summer, but often wind energy is lower in summer and higher in winter </li></ul><ul><li>The intermittencies of wind and solar power can somewhat offset each other </li></ul>
  21. 21. Small Scale Wind Power <ul><li>Generation systems with the capacity to produce 50 KWor less of electricity </li></ul><ul><li>Used in isolated communities that might otherwise rely on diesel generators </li></ul><ul><li>U.S. consumers are purchasing grid-connected turbines in the 1 to 10 kilowatt range to power their homes make electricity </li></ul><ul><li>Controversial application because many do not offset the carbon cost of their manufacture </li></ul><ul><li>A good small 5 foot diameter wind turbine blade will likely produce about 30 Watts in a 10 mph wind </li></ul>
  22. 22. Problems with Small Scale Wind <ul><li>Turbines need clean non-turbulent fuel: that’s seldom on the ground or on a roof </li></ul><ul><li>The most cost-effective arrangement is getting the wind turbine 30 feet above anything within 300 feet </li></ul><ul><li>The cost of the tower is much greater than the cost of the turbine </li></ul>
  23. 23. Current U.S. Energy Consumption
  24. 24. The Problem with Wind <ul><li>Wind comes and goes – when it goes, blackouts </li></ul>
  25. 25. End Notes <ul><li>3.1 Backyard Energy , website, , March 13, </li></ul><ul><li>2009 BACK </li></ul><ul><li>4.1 “ Global Wind Power Capacity Up,” Rueters, May 8, 2009 BACK </li></ul><ul><li>5.1 Sarah Arnott, “ Green light for the world's biggest offshore wind farm,” The Independent, May 13, 2009 BACK </li></ul><ul><li>14.1 Website, , February 3, 2009 BACK </li></ul>
  26. 26. The Problem with Wind <ul><li>Sometimes,– otherwise, blackouts </li></ul>
  27. 27. The Problem with Wind <ul><li>.. </li></ul>