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Wind Power

World's Largest Offshore Wind Farm Opens in UK

The UK has starting operating the Thanet wind farm, the largest offshore wind farm in the world -- for now.

The wind farm occupies 35 square miles off the coast of buy cialis in europe Kent and click here online levitra prescription contains 100 turbines capable of generating 300 MW of power.  This new project establishes two major milestones for Britain:  the country is now generating more offshore wind power than the rest of the world combined and it's now caught up with other European countries like Germany by having generated 5 GW of power from renewable energy.

The Thanet wind farm will only hold the canada viagra prescription title of world's largest for a short time though.  Two larger offshore wind farms are currently under construction -- the Greater Gabbard project with a 500 MW capacity and the London Array project with a 1 GW capacity -- but both of those will reside in the UK, meaning it will continue to be a world leader in offshore wind.

The UK has set a target of generating 15 percent of its energy from renewable sources by 2020.  These large projects should help them to get there.

via Guardian


Cheaper-than-Coal Power from a Tethered Kite


Makani Power is one of online order for viagra six recent US Department of Energy ARPA-E grant winners for their Airborne Wind Turbine (AWT), a tethered flying wing that flies in endless loops around its anchor point on the ground and generates electricity from propellers on board. Makani believes it will be able to produce wind power that is 40% cheaper than conventional wind power and, more importantly, at an unsubsidized real cost competitive with coal-fired power plants.

Think of this as a really big wind turbine. But, instead of needing a big blade going back to generic cialis from canada the hub, which requires a lot of strength and a lot of weight, only the tip of the blade is used, in the form of a flying wing kite on a tethered line. The kite is flying loops just like the tip of a turbine blade. The tips are the fastest moving and most energy productive part of levitra viagra price the turbine; this approach simply gets rid of the rest of the bulky, less-productive blade. The propellers on the wing are turned as it moves through the how can i get viagra overnight air, generating electricity and slowing the speed of the wing. The tether serves as both an anchor for the wing as well as the conductor to bring power to the ground for distribution.


The wing is viagra 50 mg tablets able to self-launch and, since it is not carrying fuel or batteries, it has a very high thrust to weight ratio. The wing is turned vertically and real viagra online without prescription the power-generating propellers act like helicopter rotors to power the wing to its operating altitude of 200 meters (656 feet). When wind at operating altitude drops below 3.5 m/s (7.8 mph), the speed needed to generate power, the wing re-orients into a vertical configuration (hover mode) and is winched back down to visit web site levitra sale buy its cradle.

You can see a set of animated clips showing just how this works.

Once in flight, the wing is controlled by computer systems which steer the wing to keep it in flight and maintain power generation. "The autonomous controller is responsible for maintaining a stable flight path, while also maximizing power output. To do this, hundreds of times each second the controller calculates the tramadol no perdcription wing’s position and heading from sensor data and adjusts the control surfaces (aileron, elevator, and rudder) to maintain the correct flight path. This fast response allows the wing to easily handle disturbances such as gusts. The control system has been proven, both in simulation and reality, to fly stable and reproducible paths."

We've seen other tethered power generation concepts, spinning blimps, and different versions of giant kites, as well as underwater kites, which are quite similar to the AWT. But the Makani system really seems to have everything pulled together in a complete system. The company has been testing a prototype 10 kW prototype, and will next move to the development of follow link low price viagra a utility-scale 1 MW system.

Flying at a higher altitude than turbine towers reach means that the less likely to harm birds or bats. Its maximum altitude is 600 meters (1969 feet), which is comparable with tall buildings, radio towers, and other structures, and aviation safety will be maintained with signals and lights in a fashion similar to other tall ground structures.


450-MW Biglow Canyon Wind Farm Completed

Oregon has really committed to wind power development.  The 450-MW Biglow Canyon wind farm in northern Oregon has been completed and use levitra more large projects are in the works.

The $1 billion wind farm was built in three phases over the past two and a half years.  It is comprised of 217 turbines and covers 25,000 acres in Sherman County. The energy produced by the wind farm will be able to power 125,000 homes.

The wind farm is owned by Portland General Electric, which is working to meet Oregon's renewable energy mandate of 15 percent by 2015 and 25 percent by 2025.  The completion of this project, plus already existing wind farms, will get the utility to a 9 percent renewable energy load by the end of the year.

While Biglow Canyon is a large wind farm, Oregon has a much larger one in the works.  The Shepard's Flat project, expected to be the largest in the U.S., will have a capacity of 845 MW and is due to be completed in 2012.

via Press Release


Coast Guard Implementing Net Zero Housing

The U.S. Coast Guard has set a goal of a net zero carbon footprint for housing at their Southwest Harbor Base in Maine.  The base is using solar panels, solar hot water heaters and now a wind turbine for their energy needs.  Efficiency-boosting retrofits will also be done, including new electrical systems and better insulation.

The newly-installed wind turbine sits atop a 70-foot tower and provides power to a duplex housing unit located on the base.  The upgrades and retrofits will begin in October.

The Coast Guard is looking to install wind power at other bases in Maine and around the country.  This push toward renewable energy is part of a bigger program by the Department of Defense to get 25 percent of their energy from renewable sources by 2025.

As Capt. James McPherson of cheapest viagra 50 mg the Coast Guard said, "We want to be good stewards of the environment and we want to be careful how we spend tax payer dollars, but we also think the debate is over whether we need to go to alternative energy.”  Yes, it is.

via Inhabitat


Concrete Bases Improve Wind Turbine Tower Efficiency


Concrete is not often the greenest material choice, particularly since concrete production is one of the largest single sources of carbon emissions globally. But, for wind turbine towers, the use of concrete bases can provide a number of significant benefits, including reducing the amount of concrete needed for the footings for a tower by more than two-thirds. Concrete bases can also be more economical to install and can provide faster construction times for wind towers and also can raise tower height to increase power production.

The wider footprint of the precast concrete base also adds stability to the foundation of best place cialis the tower. With the buy cheap viagra online now uk precast concrete base, load is pfizer viagra uk spread over a wider area, and a simpler ring footing can be utilized, which results in a 60% - 70% reduction in the concrete needed for the footing of the tower. This can result in a net reduction of the total amount of concrete used. The ring footing is easier to construct as well, since the problems associated with a mass pour can be avoided.

In addition to the construction benefits, the concrete bases increase the overall tower height to raise the turbine into more powerful winds or to allow the use of larger diameter blades. Metal towers are reaching limits for transportability and constructibility, but adding precast concrete tower base can add 30 meters (almost 100 feet) of height to the tower. This can allow larger diameter turbines to cialis uk be used with existing metal towers.

Concrete tower bases can also be locally produced, rather than needing specialized manufacture as with steel towers. Precast concrete sections for these bases are actually more transportable, since they are produced in sections that are assembled together once on enter site buy levitra online without a prescription site. Concrete is also a sturdier product, which is less susceptible to damage and rusting and does not require regular painting like steel.

Atlas CTB White Paper (PDF)

via: North American Windpower

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