Combining two powerful lasers, a large telescope and extremely sensitive receivers, it is one of the most advanced instruments ever put into orbit. Lift-off is set for 21 August at This is a risky time when the satellite is unusually vulnerable — not yet fully functional but still exposed to the hazards of space. Teams of highly trained engineers, flight dynamics specialists and experts in control systems and ground stations have been practising exactly what Aeolus needs to do, when, and how they will instruct it to do so.
You have already rated this page, you can only rate it once! Your rating has been changed, thanks for rating! Full steam ahead for Aeolus launch 06 July A third approach is to use low-speed generators. Germany's Enercon turbines have a direct drive that skips the step-up gearbox.
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An advantage that variable-speed turbines have over constant-speed turbines is that they can operate in a wider range of wind speeds. All turbines have upper and lower limits to the wind speed they can handle: The "cut in" and "cut out" speeds of turbines can affect the amount of time the turbines operate and thus their power output. Though wind turbine prices have increased some since see below for more information , in areas with the best resources, wind power is cost competitive with new generation from coal and natural gas plants.
In fact, analysis by the DOE Lawrence Berkeley Lab found that wind prices have been competitive with wholesale power since As wind power costs become more competitive, demand is growing exponentially all over the world. Global wind power capacity increased from just over 6, MW in to more than , MW by the end of [ 14 ]. Growth has recently been most significant in the United States, China, India, and Europe, but markets in Canada, and the rest of Asia and the Pacific are emerging quickly as well.
Global Wind Energy Council. At the end of , the USwind power market reached more than 60, MW. As of , the United States had the second most installed wind capacity behind China total wind capacity: The PTC provides a 2. Despite its being one of the primary drivers of wind development, the federal government has allowed the PTC to expire on three separate occasions since These lapses in the PTC led to a boom-bust cycle that drastically slowed the wind power industry for many months at a time.
The PTC has remained intact since late , and was extended through as part of the American Recovery and Reinvestment Act of [ 18 ]. At the end of , Congress passed a limited extension of the PTC for wind projects that begin construction in [ 19 ]. State-level renewable electricity standards RES , also commonly called renewable portfolio standards RPS , require that a minimum percentage of electricity generation comes from renewable energy. By creating demand for more renewable energy, these policies also work as a primary driver of USwind development.
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Nine of the top 10 states in total installed wind capacity have RES policies, and wind power accounted for an estimated 89 percent of the state RES-driven renewable energy capacity additions from to [ 20, 21 ]. In addition to serving the near-term market, the 29 states plus Washington, DC with renewable electricity standards are also designed to stimulate significant new development for years to come.
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Other state level policies are also driving the USwind power market, including renewable electricity funds and various tax incentives. In addition, voluntary green power markets and utility "green pricing" programs have resulted in a smaller, but quickly expanding market for wind development. The DOE reports that in , more than 35 million megawatt-hours of renewable energy generation was sold in voluntary markets—a significant contribution to the total USrenewable energy supply, Wind power accounted for 83 percent of those voluntary sales [ 22 ]. With increasingly competitive prices, growing environmental concerns, and the call to reduce dependence on foreign energy sources, a strong future for wind power seems certain.
The Global Wind Energy Council projects global wind capacity will reach , MW by , almost double its current size, with growth especially concentrated in the Asia and Europe [ 23 ]. Turbines are getting larger and more sophisticated, with land-based turbines now commonly in the MW range, and offshore turbines in the MW range.
How Wind Energy Works
The next frontiers for the wind industry are deep-water offshore and land-based systems capable of operating at lower wind speeds. Both technological advances will provide large areas for new development. As with any industry that experiences rapid growth, there will be occasional challenges along the way. Like much of the USeconomy, the financial crisis has taken a heavy toll on the wind industry, slowing down the financing of new projects and stymieing progress of the growing USwind manufacturing industry.
There are also concerns about collisions with bird and bat species in a few locations. But new manufacturing facilities, careful siting and management practices, and increased public understanding of the significant and diverse benefits of wind energy will help overcome these obstacles.
Environmental Impacts of Wind Power. Besides showing that it could be done, it estimated that achieving this goal would create over , new USjobs, reduce global warming emissions by million metric tons per year about 20 percent , and save 4 trillion gallons of water [ 24 ].
Aeolus — preparing to fly the wind mission / Operations / Our Activities / ESA
Added to this list of benefits would be greatly improved air and water quality for future generations and much less vulnerability to fluctuations in fossil fuel prices. While getting to that level will require a determined national effort, wind energy is more than ready to meet the challenge. Global Wind Report Wind energy top source for new generation in ; American wind power installed new record of 13, MW. American wind power now generates over 10 percent of electricity in nine states.
Energy You Can Count On. National Renewable Energy Laboratory.
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Spatial and temporal distribution of USwinds and wind power at 80 m derived from measurements. Journal of Geophysical Research , doi: Anatomy of a Wind Turbine. Congress extends wind energy tax credits for projects that start in Renewable portfolio standards in the United States: A technical analysis of the energy resource. We can shift our nation away from dirty fossil fuels and toward cleaner, renewable sources of power—but not without you.
Your generous support helps develop science-based solutions for a healthy, safe, and sustainable future. See how the United States can dramatically expand renewable energy. President Trump continues to push for a misguided federal bailout of the coal industry.
It's the job of our elected officials to put our health and welfare first. Share this Rating Title: The Wind 2. Use the HTML below. You must be a registered user to use the IMDb rating plugin. Learn more More Like This. Being Michael Madsen Welcome to Earth The Wind II Enter the Devil The Wind Video A novelist is stalked by a psychopath one stormy night.
Edit Cast Cast overview: Edit Storyline An ancient wind carries with it omens of the apocalypse, stirring the pride and envy of a group of college kids to murderous rage. Love comes in many forms. Edit Details Official Sites: Edit Did You Know? Add the first question.