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wellsann99

Wind Power - What is Wind Power and How Does It Work? - 0 views

environment.about.com/...wind_power.htm

wind form

shared by wellsann99 on 11 Mar 13 - Cached
  • wind power as a better way to generate electricity than plants fueled by coal, hydro (water) or nuclear power.
  • willisjos98 on 11 Mar 13
     
    "Wind power is actually a form of solar power, because wind is caused by heat from the sun. Solar radiation heats every part of the Earth's surface, but not evenly or at the same speed. Different surfaces-sand, water, stone and various types of soil-absorb, retain, reflect and release heat at different rates, and the Earth generally gets warmer during daylight hours and cooler at night. As a result, the air above the Earth's surface also warms and cools at different rates. Hot air rises, reducing the atmospheric pressure near the Earth's surface, which draws in cooler air to replace it. That movement of air is what we call wind."
  • wellsann99 on 11 Mar 13
     
    what is wind power
stanglebre99

Wind Development - 0 views

www.citizensenergy.com/...wind-development

transported wind

shared by stanglebre99 on 22 Oct 12 - No Cached
  • Negotiating power purchase agreements
  • In some states, where the electricity market has been deregulated, it is possible for the owner of a wind project to sell electricity directly to customers.  However, wind developers usually sell their electricity to electric utilities, which sell the electricity to customers. T his is usually done by negotiating a power purchase agreement, which is a contract requiring a utility to buy the electricity from a wind farm at a certain price over a certain period of time.  In some cases, an alternative arrangement is reached, in which the developer owns a share of the project long enough to mak
  • In some states, where the electricity market has been deregulated, it is possible for the owner of a wind project to sell electricity directly to customers.  However, wind developers usually sell their electricity to electric utilities, which sell the electricity to customers. T his is usually done by negotiating a power purchase agreement, which is a contract requiring a utility to buy the electricity from a wind farm at a certain price over a certain period of time.  In some cases, an alternative arrangement is reached, in which the developer owns a share of the project long enough to make a specified amount of money.  After this point, the ownership in the project “flips,” and the utility ends up owning the project.
  • ...1 more annotation...
  • a specified amount of mone
dynesbri97

Renewable Solar Energy: How is Wind Formed - 0 views

renewable-solar-energy.blogspot.com/...how-wind-is-formed.html

shared by dynesbri97 on 13 Mar 12 - No Cached
  • Wind is formed by the indirect effect of the sun on the Earth’s surface. There is a reasonable explanation why is it so. As the sun shines, the Sun heats the Earth's surface; the air near ground level gets hot and rises up. Cold air at higher altitudes replaces it. At nighttime the process is reversed. This is  in principal how is wind formed on Earth.
  • This process of hot air rising and colder air sinking, causes high and low air pressure areas and results in wind formation. The more the pressure changes in an area, the faster the wind speed will be. If two areas are close to each other, pressure difference will cause higher wind speed to be produced compared to areas that are far apart from each other. This is how the wind is formed on Earth and this phenomena is known as vertical wind formation
justice colvin

Converting Wind Energy Into Electricity - 0 views

www.envirocitizen.org/...1056.html

convert wind electricity

shared by justice colvin on 24 Sep 13 - No Cached
  •  The process of converting wind energy to electric energy uses a wind turbine. The wind turbines convert the kinetic energy in the wind into mechanical power. The mechanical power can be used for many things. In the past this meant pumping water, creating ventilation, or grinding food sources. While these things still occur, wind power is also used to generate electricity.      The wind turbine is a tall shaft with several horizontal rectangular blades attached to it. These blades are often covered with stiff material or ratting material. When turned they push against the air, causing pressure, and turning the inner shaft. This shaft connects to a generator which then creates energy.
wellsann99

How does wind generate electricity? - Curiosity - 1 views

curiosity.discovery.com/...-turbines-generate-electricity

wind convert

shared by wellsann99 on 12 Mar 13 - No Cached
  • the wind turbine collects kinetic energy from the wind and transfers it to the generator. The blades on the turbine turn as the wind blows. As these blades move, they rotate a shaft connected to the rotor of a generator. The spinning magnets of the generator convert that rotational energy into electricity.
  • wellsann99 on 12 Mar 13
     
    how wind becomes electricty
dpurdy

Wind turbine - Wikipedia, the free encyclopedia - 1 views

en.wikipedia.org/...Wind_turbine

wind convert history first

shared by dpurdy on 21 Mar 13 - Cached
  • A wind turbine
  • converts kinetic energy from the wind
  • into mechanical energy
  • ...1 more annotation...
  • The first electricity-generating wind turbine was a battery charging machine installed in July 1887 by Scottish academic James Blyth to light his holiday home in Marykirk, Scotland.
dpurdy

How Wind Works | Wind Energy Foundation - 0 views

www.windenergyfoundation.org/...how-wind-works

wind form

shared by dpurdy on 24 Mar 13 - No Cached
  • Wind is simply air in motion. It is caused by the uneven heating of the Earth's surface by the sun. Because the Earth's surface is made of very different types of land and water, it absorbs the sun's heat at different rates. One example of this uneven heating can be found in the daily wind cycle.
  • Mechanical or electrical power is created through the kinetic energy of the wind.
dpurdy

Visual Health Effects and Wind Turbines - The Society for Wind Vigilance - 0 views

www.windvigilance.com/...alth-effects-and-wind-turbines

wind disadvantages pollution

shared by dpurdy on 22 Oct 12 - No Cached
  • In addition to noise pollution wind turbines also have visual burdens.
  • The health impact of visual burdens cannot be underestimated. An epidemiology study conducted by World Health Organization determined a “bad view out of window” increased the risk for depression by 40%. The same study also demonstrated disturbance by noise and sleep disturbance by noise increased the risk of depression 40%, and 100% respectively.
  • Wind turbines produce noise and visual burdens.
  • ...3 more annotations...
  • Scientific research confirms visuals impacts can adversely affect human health.
  • Wind turbine shadow flicker has the potential to induce photosensitive epilepsy seizures however the risk is low with large modern models and if proper planning is adhered to.
  • Wind turbine shadow flicker induced adverse human health effects include annoyance and/or stress.
dpurdy

Define Wind Energy - Here are Wind Energy Facts - 0 views

www.alternative-energy-resources.net/definewindenergy.html

what Wind

shared by dpurdy on 03 Nov 11 - No Cached
  • In scientific terms, wind energy is the "force" of winds blowing across the earth’s surface ("Wind Energy"). Wind is caused by uneven heating on the earth’s surface. The equator region receives more heat than say, Antarctica.
  • That heat tries to move from hotter to colder regions. Wind energy was first harvested centuries ago, when early windmills were used to power millstones, pumps, and forges
  • The amount of kinetic energy within Earth's atmosphere is equal to about 10,000 trillion kilowatt-hours.
  • anonymous on 03 Oct 13
     
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kurishkri00

Wind Energy - 0 views

www.conserve-energy-future.com/Wind_Into_Energy.php

wind convert

shared by kurishkri00 on 23 Sep 13 - No Cached
  • The wind turns the blades, which spin a shaft connected to the generator and produces electricity. Turbine blades are designed in such a way that wind causes them to rotate, which rotates the shaft at low speed, with a gear at the end that itself is connected to small gear on high speed shaft that runs through alternator housing.
  • he generator produces electricity using the same principle as a generator of your car (depending on the turbine). Magnetic Rotor inside the generator on high speed shaft spins inside loops of copper wire that are wound around an iron core. The rotor creates “electromagnetic induction” as it spins around the inside of the core through the coils, which generates electrical power. The current is regulated and transmission network (or home network system connection), after some changes, so it can use in our homes or sent to a battery bank for storage.
  • kurishkri00 on 26 Sep 13
     
    Most wind turbines turn in the moving air like blades of propeller aircraft and supply power to an electric generator that produces electricity. Wind turbines, rather than working as a fan in your house that uses electricity to generate wind, use wind power to generate electricity. - See more at: http://www.conserve-energy-future.com/Wind_Into_Energy.php#sthash.MFQJ5BOI.dpuf
stewartlas97

History of Wind Power - 0 views

www.windturbinesnow.com/history-wind-power.htm

wind

shared by stewartlas97 on 12 Mar 13 - No Cached
  • stewartlas97 on 12 Mar 13
     
    "China has also laid claims to having invented windmills around 2,000 years ago, but the first documented claims appear in the 1200's. Around 250 A.D. the Romans introduced windmills into their culture and in the 700's so did Afghanistan. The Afghanistan windmills were also of the vertical axis style and cloth sails or reed matting was developed to catch the air. These windmills were used to grind corn and sugarcane plus draw water. 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 work than other windmills previously designed. The Holland windmills were also being used to grind grains and to drain part of the Rhine River. In the 19th century Denmark had an estimated 2,500 windmills and in the U. S. windmills were starting to be used to pump water. The Halladay windmill of 1854 is one such example of this. The first windmill in the world built for electrical production was in 1887 in Scotland built by Professor James Blyth. A year later in 1888 in the U. S. Charles Brush of Cleveland, Ohio built a large wind turbine used to generate electricity."
cottonetar98

GENERATION TO THE NATION - 0 views

www.ehow.com/es_4740597_wind-farm-work.html

wind form ehow

shared by cottonetar98 on 08 Mar 13 - No Cached
cottonetar98 liked it
  • Wind is created when the sun hits the earth. The air above water and the air above the ground heat at different rates. Since the air above the ground heats faster, the warm air from the ground hits the atmosphere first. It then is pushed out toward the sea. As the air heads toward the sea, it gets colder and sinks back down to the sea level. This creates a current pushing the sea air toward the land in the form of wind. The stronger the sun's energy on the land and water, the faster the wind will circulate.
  • As the gearbox turns, it feeds the RPM into the generator, which transfers the energy into usable electrical energy and stores it. Large cables are attached to the generator that feed the electrical currents from the generators of all the wind turbines on the farm into one electrical storage area. The energy can then be transported through power lines around the area for commercial and home usage.
  • cottonetar98 on 08 Mar 13
     
    What makes wind. 
fieldingbry99

Ch 12 Page 73: Sustainable Energy - without the hot air | David MacKay - 0 views

www.withouthotair.com/...page_73.shtml

sustainable wave

shared by fieldingbry99 on 11 Mar 13 - No Cached
  • In open water, waves are generated whenever the wind speed is greater than about 0.5 m/s.
  • First, let’s clarify where waves come from: sun makes wind and wind makes waves.
  • fieldingbry99 on 11 Mar 13
     
    "First, let's clarify where waves come from: sun makes wind and wind makes waves."
lemairenat98

Tidal power - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Tidal_power

tide form

shared by lemairenat98 on 11 Mar 13 - No Cached
  • Tidal stream generators (or TSGs) make use of the kinetic energy of moving water to power turbines, in a similar way to wind turbines that use wind to power turbines. Some tidal generators can be built into the structures of existing bridges, involving virtually no aesthetic problems. [edit] Tidal barrage
  • lemairenat98 on 11 Mar 13
     
    "Tidal stream generator Main article: Tidal stream generator Tidal stream generators (or TSGs) make use of the kinetic energy of moving water to power turbines, in a similar way to wind turbines that use wind to power turbines. Some tidal generators can be built into the structures of existing bridges, involving virtually no aesthetic problems."
dpurdy

Tidal power - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Tidal_power

shared by dpurdy on 03 Nov 12 - No Cached
  • Tidal stream generators (or TSGs) make use of the kinetic energy of moving water to power turbines, in a similar way to wind turbines that use wind to power turbines. Some tidal generators can be built into the structures of existing bridges, involving virtually no aesthetic problems. Likewise, “tidal bridging” is a relatively new advancement that is gaining recognition as a more practical and beneficial way to generate tidal power.
    • dpurdy
      dpurdy on 03 Nov 12
       
      Good pic of tidal stream generator working
  • dpurdy on 03 Nov 12
     
    "Tidal stream generators (or TSGs) make use of the kinetic energy of moving water to power turbines, in a similar way to wind turbines that use wind to power turbines. Some tidal generators can be built into the structures of existing bridges, involving virtually no aesthetic problems. Likewise, "tidal bridging" is a relatively new advancement that is gaining recognition as a more practical and beneficial way to generate tidal power."
stewartlia99

Wind Energy - 0 views

biodiesel.environmentalactiongroup.org/wind.html

wind cost infrastructure

shared by stewartlia99 on 22 Oct 12 - No Cached
  • Cons:
  • The purchase and set-up of wind turbines can be expensive
  • Wind turbines require certain constant speeds to be productive (13 mph for large turbines, 9 mph for small turbines)
  • ...1 more annotation...
  • Wind farms can't sustain constant power due to daily and seasonal variance in wind
kurishkri00

About Wind Energy - 0 views

www.masscec.com/...wind-energy

wind form

shared by kurishkri00 on 23 Sep 13 - No Cached
  • kurishkri00 on 23 Sep 13
     
    Wind turbines harness wind energy to produce electricity that can be used to power homes and businesses across the Commonwealth. Wind power systems range from small turbines that power a single home or business to large, multi-turbine wind farms that feed into the grid and generate enough electricity to power thousands of Massachusetts homes.
westkea00

Wave power: how it works | SmartPlanet - 0 views

www.smartplanet.com/...3769

shared by westkea00 on 25 Sep 13 - No Cached
  • What is wave power? Wave power is renewable energy derived from ocean waves. It is the kinetic energy of wind interacting with water and creating waves
  • Wave energy is generated by the wind
  • The best wave energy environments are along western coastlines because the largest, most consistent winds come from the west,
  • ...7 more annotations...
  • How does wave power work? Most of the energy comes from the rising and falling water level and requires exposure to the waves
  • There might never be a dominant technology for harnessing this power
  • because of the differences in potential wave energy sites throughout the world.
  • all ocean energy resources, including wave power, would combine to create energy 800 times more powerful than wind
  • Currently, wind is our biggest renewable energy source
  • What are the benefits of wave power? Because wave devices tend to be on the surface and don’t have propellers, as tidal power technologies do, some believe they will create less environmental damage than other renewable energy technologies,
  • There are advantages compared to wind in that the devices are smaller and don’t have the visual profile that wind turbines have.”
thibodeaueth00

HowStuffWorks "10 Incredible Wind Power Facts" - 0 views

science.howstuffworks.com/...10-wind-power-facts3.htm

wind

shared by thibodeaueth00 on 23 Sep 13 - No Cached
  • 8: One Megawatt of Wind Energy = 2,600 Fewer Tons of Carbon Dioxide So, with all the noise about clean energy, what kind of improvement are we really talking about with wind? Consider that every year 1MW of wind energy can offset approximately 2,600 tons of carbon dioxide (CO2) [source: NREL], and the interest comes into focus. The simple math is less fossil fuel consumption equals less CO2. And measuring carbon reduction has become a key benchmark for monitoring the progress of alternative energy adoption.
olsentri00

Wind Energy - 2 views

www.nrdc.org/...wind.asp

history wind convert form

shared by olsentri00 on 24 Sep 13 - No Cached
  • olsentri00 on 24 Sep 13
     
    Locations of the 400+ U.S. Wind-Related Manufacturing Facilities and Number of Wind Industry Jobs per State Source: (AWEA 2011) U.S. Wind Industry Annual Market Report, Year Ending 2010 Wind power is an affordable, efficient and abundant source of domestic electricity. It's pollution-free and cost-competitive with energy from new coal- and gas-fired power plants in many regions.
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