of the windmill Figure E21.2.1 shows the important parts of a windmill. The wind is shown heading perpendicular toward the hub and blade assembly (this example uses three blades‚ but some use only two‚ and‚ as Fig. 21.7 shows‚ some use many blades). Fig. E21.2.1 A view of a horizontal axis wind energy machine. (U.S. Department of Energy‚ Ref. 30) Energy‚ Ch. 21‚ extension 2 How a windmill works 2 Wind machines come in two basic types—horizontal axis or vertical axis machines. The
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Background/History on the Wind Power Industry The wind power industry first developed in Iran around 200 B.C. The first windmills were vertical axis wind turbines‚ which were used for pumping water and grinding whole grains for food consumption. The Chinese‚ Romans and Afghans all used windmills around this time for similar use. In the 13th century Holland started developing large horizontal axis windmills. These four-blade windmills were larger‚ carried more torque and wind speed and could do more
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Wind Energy Technology IEEE PES 22 July 2008 JP Lyons - Novus Energy Partners Bob Thresher – NREL Wind Tech Center Mike Robinson – NREL Wind Tech Center Paul Veers – Sandia National Labs Modern Wind Turbines Electrical Pitch Drives GE 1.5sl • 1.5 MW • 77 M Rotor Diameter • 50-100 M Tower Doubly-Fed Generator • 98% Availability • Speed 10-20 RPM Main Shaft & Bearing • Variable Pitch Gearbox Epoxy-Glass Composite Blades Transformer & Electrical Power
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Clint Eastwood‚ with his movie Invictus‚ notches another success which uses a rugby championship as a means for examining South Africa ’s transition from apartheid. Two characters are highlighted: Nelson Mandela (played by Morgan Freeman) the new president of South Africa (1994-1999) and the captain of the Springboks‚ François Pienaar (played by Matt Damon). After being locked up for 27 years‚ Nelson Mandela returns to politics. He symbolizes the new South Africa in which Black and White have the
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Inherit the Wind Inherit the wind takes place in July in a rural town called Hillsboro. The play describes itself saying that it takes place in the not so distant past; however the play was written based on the famous scopes trial in 1925 so it may have been set around that era. The place take about a week from the time we meet the protagonist Bertram Cates until his sentence is read in court. The story is written in third person‚ because it is a play and is not inside the mind of one specific
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Gone‚ Ambulance Girl‚ Gone Alright‚ this is going to be a blog post like no other. Usually you will not find me sharing details about my life because I am a very private person. I’m just leading a very quiet and simple life so there is not that much to share if I feel that I just must put this out there. I’m writing a book. Well actually I am writing two – one about my experiences as a paramedic and the other is fictional but I’m referring to the first one here. The working title is Ambulance Girl
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| Wind Pollinated | | small petals‚ often brown or dull green - no need to attract insects | | no scent - no need to attract insects | | no nectar - no need to attract insects | | pollen produced in great quantities - because most does not reach another flower | | pollen very light and smooth - so it can be blown in the wind and stops it clumping together | | anthers loosely attached and dangle out - to release pollen into the wind | | stigma hangs outside the flower - to catch
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SACE 2 - English Communications Task 2 Novel: The Divine Wind By Gary Disher Gary Disher’s novel‚ The Divine Wind‚ is set in a typically Australian town called Broome‚ before and during World War II. The central characters‚ Hart‚ Alice and Mitsy help Disher explore and establish themes regarding numerous relationships which occur within society. Friendship is the first‚ showing how with age the foundations to which these are made cannot always be strong enough to maintain friendships. The other
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In Jerome Lawrence and Robert E. Lee’s tense drama‚ "Inherit the Wind"‚ three strong characters express powerful opinions: Bertrum Cates ‚ Henry Drummond‚ and Mathew Harrison Brady. First‚ Bert Cates‚ the defendant‚ is charged with teaching "Darwinism" to his sophomore class . Second‚ Henry Drummond‚ the defense attorney for Cates‚ displays his beliefs of the right to think. third‚ Mathew Harrison Brady‚ the "big-shot" prosecuting attorney‚ illustrates his bigotry of creationism. To conclude‚ these
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Quinn Perry Mrs. Laureen Batchelor American Literature II April 7‚2013 The Dead and the Gone Life can offer many dark and twisted challenges to an individual. A life can change from a single decision; and‚ perhaps a part of life‚ becomes accepting one’s own decisions…right and wrong. In The Dead and The Gone ‚by Susan Pfeffer‚ seventeen-year-old Alex Morales faces loss‚ remorse‚ and death when an asteroid collides with the moon and chaos erupts in urban New York City. Assuming both of
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