Know how to about Renewable Energy  :  

 

 

 

 

 

How Wind Turbines Work

Wind is a form of solar energy. Winds are caused by the uneven heating of the atmosphere by the sun, the irregularities of the earth's surface, and rotation of the earth. Wind flow patterns are modified by the earth's terrain, bodies of water, and vegetation. Humans use this wind flow, or motion energy, for many purposes: sailing, flying a kite, and even generating electricity.

The terms wind energy or wind power describe the process by which the wind is used to generate mechanical power or electricity. Wind turbines convert the kinetic energy in the wind into mechanical power. This mechanical power can be used for specific tasks (such as grinding grain or pumping water) or a generator can convert this mechanical power into electricity.

So how do wind turbines make electricity? Simply stated, a wind turbine works the opposite of a fan. Instead of using electricity to make wind, like a fan, wind turbines use wind to make electricity. The wind turns the blades, which spin a shaft, which connects to a generator and makes electricity. Take a look inside a wind turbine to see the various parts. View the wind turbine animation to see how a wind turbine works.

This aerial view of a wind power plant shows how a group of wind turbines can make electricity for the utility grid. The electricity is sent through transmission and distribution lines to homes, businesses, schools, and so on.

Learn more about wind energy technology:

• Types of Wind Turbines
• Sizes of Wind Turbines
• Inside the Wind Turbine

Types of Wind Turbines

Modern wind turbines fall into two basic groups: the horizontal-axis variety, as shown in the photo, and the vertical-axis design, like the eggbeater-style Darrieus model, named after its French inventor.

Horizontal-axis wind turbines typically either have two or three blades. These three-bladed wind turbines are operated "upwind," with the blades facing into the wind.

Sizes of Wind Turbines

Utility-scale turbines range in size from 100 kilowatts to as large as several megawatts. Larger turbines are grouped together into wind farms, which provide bulk power to the electrical grid.

Single small turbines, below 100 kilowatts, are used for homes, telecommunications dishes, or water pumping. Small turbines are sometimes used in connection with diesel generators, batteries, and photovoltaic systems. These systems are called hybrid wind systems and are typically used in remote, off-grid locations, where a connection to the utility grid is not available.

Inside the Wind Turbine

Anemometer:

Measures the wind speed and transmits wind speed data to the controller.

Blades:

Most turbines have either two or three blades. Wind blowing over the blades causes the blades to "lift" and rotate.

Brake:

A disc brake, which can be applied mechanically, electrically, or hydraulically to stop the rotor in emergencies.

Controller:

The controller starts up the machine at wind speeds of about 8 to 16 miles per hour (mph) and shuts off the machine at about 55 mph. Turbines do not operate at wind speeds above about 55 mph because they might be damaged by the high winds.

Gear box:

Gears connect the low-speed shaft to the high-speed shaft and increase the rotational speeds from about 30 to 60 rotations per minute (rpm) to about 1000 to 1800 rpm, the rotational speed required by most generators to produce electricity. The gear box is a costly (and heavy) part of the wind turbine and engineers are exploring "direct-drive" generators that operate at lower rotational speeds and don't need gear boxes.

Generator:

Usually an off-the-shelf induction generator that produces 60-cycle AC electricity.

High-speed shaft:

Drives the generator.

Low-speed shaft:

The rotor turns the low-speed shaft at about 30 to 60 rotations per minute.

Nacelle:

The nacelle sits atop the tower and contains the gear box, low- and high-speed shafts, generator, controller, and brake. Some nacelles are large enough for a helicopter to land on.

Pitch:

Blades are turned, or pitched, out of the wind to control the rotor speed and keep the rotor from turning in winds that are too high or too low to produce electricity.

Rotor:

The blades and the hub together are called the rotor.

Tower:

Towers are made from tubular steel (shown here), concrete, or steel lattice. Because wind speed increases with height, taller towers enable turbines to capture more energy and generate more electricity.

Wind direction:

This is an "upwind" turbine, so-called because it operates facing into the wind. Other turbines are designed to run "downwind," facing away from the wind.

Wind vane:

Measures wind direction and communicates with the yaw drive to orient the turbine properly with respect to the wind.

Yaw drive:

Upwind turbines face into the wind; the yaw drive is used to keep the rotor facing into the wind as the wind direction changes. Downwind turbines don't require a yaw drive, the wind blows the rotor downwind.

Yaw motor:

Powers the yaw drive.

 

 

 

Wind Energy – Renewable energy harnesses natural wind power – Effective answer for emission problem towards cleaner, safer and greener environment:

Harnessing renewable alternative energy is the ideal way to tackle the energy crisis that looms large over the world. Renewable energy is the energy which is made from resources that Mother Nature replaces. Renewable energy is also called “clean energy” or “green power” because it doesn’t pollute the air or the water. Wind energy is one such renewable energy source that harnesses natural wind power. People try to make many assumptions against wind turbines for generation of wind energy; but the fact remains, wind energy is most suitable form of renewable energy we can have to replace coal fired / nuclear powered / and even oil fired power plants in the near future. In support various points are discussed below:

1. Wind power is a clean, renewable source of energy which produces no greenhouse gas emissions or waste products. Power stations are the largest contributor to carbon emissions, producing tones of CO2 each year. We need to switch to forms of energy that do not produce CO2. Just one modern wind turbine will save over 4,000 tones of CO2 emissions annually.

2. Wind energy is generated by blowing air. Wind energy transform in kinetic energy and use as mechanical energy or electricity. The amount of energy produce depends mainly on blowing wind speed; density of air affects the energy produce by wind, which is determined by the humidity, barometric pressure, dryness.

In the case of a wind-electric turbine, the turbine blades are designed to capture the kinetic energy in wind. When the turbine blades capture wind energy and start moving, they spin a shaft that leads from the hub of the rotor to a generator. The generator turns that rotational energy into electricity. At its essence, generating electricity from the wind is all about transferring energy from one medium to another.

The simplest possible wind-energy turbine consists of three crucial parts:

* Rotor blades – The blades are basically the sails of the system; in their simplest form, they act as barriers to the wind (more modern blade designs go beyond the barrier method). When the wind forces the blades to move, it has transferred some of its energy to the rotor.

* Shaft – The wind-turbine shaft is connected to the center of the rotor. When the rotor spins, the shaft spins as well. In this way, the rotor transfers its mechanical, rotational energy to the shaft, which enters an electrical generator on the other end.

* Generator – At its most basic, a generator is a pretty simple device. It uses the properties of electromagnetic induction to produce electrical voltage – a difference in electrical charge. Voltage is essentially electrical pressure – it is the force that moves electricity, or electrical current, from one point to another. A simple generator consists of magnets and a conductor. The conductor is typically a coiled wire. Inside the generator, the shaft connects to an assembly of permanent magnets that surrounds the coil of wire. In electromagnetic induction, if you have a conductor surrounded by magnets, and one of those parts is rotating relative to the other, it induces voltage in the conductor. When the rotor spins the shaft, the shaft spins the assembly of magnets, generating voltage in the coil of wire. That voltage drives electrical current (typically alternating current, or AC power) out through power lines for distribution.

3. Energy of wind power depends upon speed of air when increase in speed of air then increase in generation of energy and when decrease then decrease in energy generation. So locate the wind power plant in windiest areas.

4. The cost of wind energy is determined by initial cost of the wind power plant - any wind power plant that is installed in a windy area generates less expensive electricity than the same unit installed in a less windy area.
5. The average wind farm will pay back the energy used in its manufacture within 3-5 months of operation. This compares favorably with coal or nuclear power stations, which take about six months.

6. A modern wind turbine is designed to operate for more than 20 years and at the end of its working life, the area can be restored at low financial and environmental costs. Wind energy is a form of development which is essentially reversible – in contrast to fossil fuel or nuclear power stations.

7. A modern wind turbine produces electricity 70-85% of the time, but it generates different outputs depending on the wind speed. Over the course of a year, it will typically generate about 30% of the theoretical maximum output. This is known as its load factor. The load factor of conventional power stations is on average 50%. A modern wind turbine will generate enough to meet the electricity demands of more than a thousand homes over the course of a year.

8. All forms of power generation require back up and no energy technology can be relied upon 100%. Variations in the output from wind farms are barely noticeable over and above the normal fluctuation in supply and demand.

9. The cost of generating electricity from wind has fallen dramatically over the past few years. Between 1990 and 2007, world wind energy capacity doubled every three years and with every doubling prices fell by 15%. Wind energy is competitive with new coal and new nuclear capacity, even before any environmental costs of fossil fuel and nuclear generation are taken into account. As gas prices increase and wind power costs fall – both of which are very likely – wind becomes even more competitive, so much so that some time after 2010 wind should challenge gas as the lowest cost power source. Furthermore, the wind is a free and widely available fuel source; therefore once the wind farm is in place, there is no fuel requirement or no waste related costs.

10. In future, we will need a mix of both onshore and offshore wind energy to meet the challenging targets on climate change. At present, onshore wind is more economical than development offshore. However, more offshore wind farms are now under construction. Thus, prices will fall as the industry gains more experience.

11. Wind energy is a benign technology with no associated emissions, harmful pollutants or waste products. In over 25 years and with more than 75,000 machines installed around the world, and there is no report of any body has ever been harmed by the normal operation of wind turbines.

12. The evolution of wind farm technology over the past decade has rendered mechanical noise from turbines almost undetectable with the main sound being the aerodynamic swoosh of the blades passing the tower.

13. We need to act now to find replacement power sources – wind is an abundant resource, and therefore has a vital role to play in the new energy portfolio all over the world.

14. Generation of electrical energy by wind power plant rapidly growing in whole world, In terms of installation and operation world level. Average onshore turbines discussed here is of capacity 1.8 MW. For many on-going projects at present the capacity over 2 MW turbines are being installed. Offshore turbines currently being installed are rated at 3 MW, and it is expected that this will rise to a typical 5 MW per machine by 2010.

15. The benefits of wind energy:
* Wind energy is an ideal renewable energy because:

1. Pollution-free,
2. Does not require fuel
3. Does not produce toxic or radioactive waste.

* Wind energy is quiet and does not present any significant hazard to birds or other wildlife.
* When large arrays of wind turbines are installed on farmland, only about 2% of the land area is required for the wind turbines. The rest is available for farming, livestock, and other uses.
* Ownership of wind turbine generators by individuals and the community allows people to participate directly in the preservation of our environment.

16. The Fastest-Growing Energy Source – Wind is the fastest-growing energy source in the world, enjoying an average annual growth rate of 28 percent over the past ten years, compared to less than three percent for fossil fuels. The major drivers of this growth include concerns over climate change and energy security.

17. Untapped Potential – Despite monumental growth, wind energy still represents only a minute fraction of total energy consumption worldwide. Increasing this percentage to levels that will contribute to necessary reductions in global greenhouse gas emissions will require significant political support to overcome decades of policies encouraging conventional fossil fuel technologies. If a more level playing field is achieved, wind energy will likely play a major role in future climate change strategies in both national and international arenas.

18. Breakthrough In Small Wind Technology - The main work of wind turbines is to utilize the energy of wind and convert it into electricity; stronger wind is considered good for electricity production. But the speed of wind should not be too strong because it makes turbines spin too fast and in this process it commits suicide! Why is it so? Because turbine blades get ripped off by stronger winds – excessive heat damages the alternator. Turbine tower too can’t remain unaffected by the strong wind. To prevent all this damage a mechanical breaking system furling is generally used. This method prevents wind turbine from spinning too quickly by turning the blades away from the direction of the wind. Furling can be manual or automatic with same goal i.e. turning the turbine blade edges into the wind when the wind is dangerously strong and stormy.

19. Drawbacks - We already know the benefits of wind energy and why we should opt for it. But currently manufacturers are concentrating on the drawbacks of the wind energy and trying to eliminate or minimize those shortcomings. For example turbines are noisy and this sound nuisance can be a problem for the residents of the areas. Wind turbines are unsafe for birds too. Birds can be injured or die if they are caught up in the wings of the turbines. Turbines might annoy you due to horizon pollution i.e. they might meddle with your aesthetic sense.

20. Wind Energy From Ocean Surface – When we talk about wind energy, we don’t specifically mention ocean winds. But global satellite maps from NASA promise a new hope. Nearly a decade of data from NASA’s QuikSCAT satellite gives us hope that we can harness ocean’s wind for energy generation. These maps can help in locating and planning the offshore wind farms for producing electric energy.

21. Next Generation Wind Energy - Right now wind energy is only being harnessed in the windy regions of the earth. Installation of wind energy on individual basis is unpopular because of production and cost inefficiency. Noise pollution and birds getting killed are also not quite attractive side-effects of the windmills. We can’t even imagine of installing windmills on high rise buildings due to their size and cost.

Researchers of university Illinois have thought about all the drawbacks of the windmills and have come up with their own version in the wind turbine technology. Their idea is to have double-helix wind turbine known as ‘aeroturbines’. The design of these aeroturbines is comparatively simple and to eliminate the drawbacks of the existing turbines. Harvesting wind energy from high rise buildings will be possible and production and cost efficiency will be the key factors. The propellers of these aero turbines resemble an electric beater and don’t look like a blade. These aeroturbines will not produce noise pollution and can be installed at the rooftops of high rise buildings. They are safe for birds as well.

22. Cost comparison and Govt. incentives - The cost of utility-scale wind power has come down dramatically in the last two decades due to technological and design advancements in turbine production and installation. The higher the wind speed over time in a given turbine area, the lower the cost of the electricity that turbine produces. Below a comparison of various energy generation costs (average) is shown:

Government incentives for both large- and small-scale producers contribute to the economic feasibility of a wind-power system as well.

 

23. Floating wind turbine launched: Floating wind turbine could lead to offshore wind farms eventually being located many miles offshore, away from areas where they cause disruption. This would benefit military radar operations, the shipping industry, fisheries, bird life and tourism. Floating wind farms could provide an additional source of energy for countries that have run out of space for their onshore wind farms, or where there is not enough wind on land. [Reference: http://news.bbc.co.uk/2/hi/business/8085551.stm ]

As per the recent news, Hywind, the 2.3MW floating offshore wind turbine being developed by Norwegian oil and gas company StatoilHydro, Siemens and Technip has now been installed and moored to the seabed off the coast of Norway. Once cables to the mainland grid have been laid, the wind turbine prototype will undergo a two year pilot which will provide valuable knowledge on how to perfect the technology and hopefully one day enable floating wind turbines to become a financially viable alternative to other energy sources. [Refer: http://www.gizmag.com/hywind-floating-wind-turbine/11961/ ]
 

Hywind facts in brief:

* Turbine size: 2.3 MW

* Turbine weight: 138 tons

* Turbine height: 65m

* Rotor diameter: 82.4m

* Draft hull: 100m

* Displacement: 5300m3

* Diameter at water line: 6m

* Diameter submerged body: 8.3m

* Water depths: 120-700m

* Mooring: 3 lines

 

Vestas Wind turbines

We install a wind turbine every three hours. Globally.

With Vestas as your supplier and business partner, you are basing your investment on documented processes: More than 25 years’ experience, insights and knowledge of wind.
 
Vestas wind turbines are checked and tested at our own test centres, after which the results are verified and certified by independent organisations. We also continuously monitor a large number of the turbines in operation, both to determine how the turbine design can be optimised and to use the data and knowledge to make turbine operation even more reliable and cost-effective.

Vestas has an extensive portfolio of turbines which are each suited to specific conditions and requirements. Click the category you want to learn more about:

kW - the turbine that goes anywhere

• kW
• 1.65 MW
• 2.0 MW
• 3.0 MW

 

Our kilowatt turbine, the V52-850 kW, is extremely reliable, and well suited to sites with restricted access or complex terrain. Compact dimensions make the V52 easy to transport and install.

We have installed over 2,100 V52s worldwide

Over the past 25 years, Vestas has expanded the limits for what is possible. With the V52, we have also made great strides in terms of flexibility. Offering a choice of five different tower heights that vary from 44 m to 74 m, the V52 is equipped with OptiSpeed®, which maximises the aerodynamic efficiency of the rotor in response to changing wind conditions.

Read more

V52-850 kW brochure (pdf)
OptiSpeed® 

 

1.65 MW - creating more from less

 

In this turbine class, we offer the V82-1.65 MW. This turbine uses ActiveStall® technology, which ensures that the rotor gathers the maximum power available from the prevailing wind, while minimising loads and controlling output. Today, 1,200 turbines of this type have been installed at sites with temperatures ranging from arctic to tropical.

Read more

V82-1.65 MW brochure (pdf)
ActiveStall®

2.0 MW - versatile mega wattage

 

Our 2.0 MW turbines offer high availability, outstanding grid compatibility and proven technology. Since 2003 we have installed more than 5,000 2.0 MW turbines around the globe – onshore and off. And with the new V100-1.8 MW, reliable performance is now achievable at low wind sites.

More energy and less noise

The 2.0 MW is synonymous with increased energy production, better power quality and less mechanical wear – thanks to the advanced OptiSpeed® technology*.
 
Available with an 80m and 90m rotor, the V90-1.8/2.0 MW is built on the advanced blade profile and technology used in the V90-3.0 MW. The blades have the same weight as the V80-2.0 blades, but sweep 27 per cent more area. And the nacelle design is based on the V80, but the gearbox and transmission have been adapted to withstand increased loads from a larger rotor. The result is an extremely competitive wind turbine for the low and medium wind segments.

The new V100-1.8 MW – unsurpassed availability

The V100-1.8 MW is the next generation of our successful and highly reliable 2.0 MW class of wind turbines. These turbines have a proven track record of high availability even in the most extreme conditions. Specially designed for reliable performance at low wind sites, the innovative V100-1.8 MW is based on this tried and tested technology.
The V100-1.8 MW delivers consistently high revenue at sites where it was previously impossible to harvest wind power. The V100-1.8 MW turbine’s availability comes from its rugged modular design, which also provides exceptional grid compliance. And several suppliers can provide the turbine’s many standard components, ensuring further reliability and availability – under any conditions. 

*Vestas Converter System (VCS) turbines are not available in Canada and the US. For the North American market, the turbines are available as Vestas Converter Unity System (VCUS) versions.

Read more

V80-2.0 MW brochure
V80-2.0 MW brochure (US only)  
V90-1.8 and 2.0 MW brochure
V90-1.8 MW brochure (US only)
V100-1.8 MW brochure 
OptiSpeed®
Offshore wind power solutions

3.0 MW - an efficient way to more power

• kW
• 1.65 MW
• 2.0 MW
• 3.0 MW

 

Since the V90 3.0 MW turbine was introduced in 2002, Vestas have installed more than 1,000 around the world. And now, with the launch of the V112-3.0 MW turbine, we can supply the world with modern energy that’s more efficient and reliable than ever.

Every aspect of the design of the V90-3.0 MW turbine has been rethought with the aim of reducing the cost per kWh. The lighter the turbine, the lower the cost of production, materials, transport and installation. These are the reasons why weight reduction has high priority in turbine development.

Despite the larger rotor and generator, the V90-3.0 MW weighs less than the V80-2.0 MW turbine. The V90 introduces a lighter, stronger tower and a ground-breaking nacelle design which produces more power from less weight. The blade structure, which is different from previous blade technologies, incorporates both new materials and a revised blade profile design.

Stable, high-output modern energy

Our new onshore turbine for low and medium wind speeds, the V112-3.0 MW can generate more electricity than any other turbine in the 3 MW class. Effective and reliable even under the harshest weather conditions, it sets new standards in turbine performance and efficiency.

Built using tried-and-tested technology, the V112-3.0 MW features the latest advances in blade and nacelle design to make the most of fluctuating weather conditions. And innovations in cooling systems and load-optimised operation enable the turbine to keep generating power when other systems grind to a halt.

The V112-3.0 MW integrates seamlessly with current plant configurations and complies with even the most demanding grid codes. And because it’s constructed with easy-to-obtain parts and components, it’s readily available and extremely reliable.

Read more

Download the V90-3.0 MW brochure
Download the V112-3.0 MW brochure
The lighter the weight, the higher the profits
Offshore wind power solutions 

 

Wind Turbine

 

 

• Products & Services

• Products

• Wind Turbines

• 1.5 MW Wind Turbine

• 2.X MW Wind Turbine

• 3.6 MW Wind Turbine

• Services

• Lifecycle Services

 

 

High Efficiency & Reliability Superior power quality. Maximum energy capture. Reactive power control and voltage support. Reduced loads. GE technologies provide every benefit for high efficiency and reliability. Contact us about wind energy at GE

Technologies

Variable Speed Control

GE technology features unique variable speed control technology to maximize energy capture from the wind and minimize turbine drivetrain loads.

Unique Wind Volt-Amp-Reactive ("WindVAR") Technology

GE's unique dynamic power conversion system with optional WindVAR control provides support and control to local grid voltage, improving transmission efficiencies and providing the utility grid with reactive power (VARs), increasing grid stability. GE technology, outfitted with its unique WindVAR option, automatically maintains defined grid voltage levels and power quality in fractions of a second. This feature is particularly beneficial with weaker grids or larger turbine installations.

• Learn more about WindVAR technology

Low Voltage Ride-Thru Technology

GE has just taken wind power electronics to the next level of performance. Wind turbines can now, for the first time, remain online and feed reactive power to the electric grid right through major system disturbances. GE's innovative Low Voltage Ride-Thru (LVRT) feature enables wind turbines to meet transmission reliability standards similar to those demanded of thermal generators. LVRT adds significant new resiliency to wind farm operations at the time when more utilities require it.

• Learn more about Low Voltage Ride-thru technology

Advanced Electronics

Through its advanced electronics, the GE wind turbine's control system continually adjusts the wind turbine's blade pitch angle to enable it to achieve optimum rotational speed and maximum lift-to-drag at each wind speed. This "variable speed" operation maximizes the turbine's ability to remain at the highest level efficiency. In contrast, fixed speed wind turbines only attain peak efficiency at one wind speed. The result: greater annual energy production yield as compared to machines operating at constant speed.

Additionally, while constant speed rotors must be designed to deflect high wind gust loads, GE's variable speed operation enables the loads from the gust to be absorbed and converted to electric power. Generator torque is controlled through the frequency converter. This control strategy allows the turbine rotor to overspeed operation in strong, gusty winds, thereby reducing torque loads in the drivetrain. Our variable speed wind turbine converts the extra energy in wind gusts to electric power. The GE turbine's operating speed range is notably wider than the "slip" range used by other technologies, which produce heat rather than electric power when regulating power in strong, gusty winds.

Active Damping

GE's variable speed system also provides active damping of the entire wind turbine system, resulting in considerably less tower oscillation when compared to constant speed wind turbines. Active damping of the machine also limits peak torque, providing greater drivetrain reliability, reduced maintenance cost and longer turbine life.

 

 

Features & Benefits The 1.5 MW machine is active yaw and pitch regulated with power/torque control capability and an asynchronous generator. It uses a bedplate drive train design where all nacelle components are joined on a common structure, providing exceptional durability. The generator and gearbox are supported by elastomeric elements to minimize noise emissions. GE offers quality manufacturing, experienced power plant design and engineering, development expertise, creative financing options, experienced operations and maintenance and responsive and reliable customer service. Its wind technology has been used in world-class projects around the globe. View technical specifications View technical data Learn about Wind Plant Peformance (498KB PDF) Learn more about our wind energy technology Technical Drawing

Download More Information 1.5 MW Wind Turbine Brochure (804KB PDF) Wind Service Solutions Brochure (1.54MB PDF) Wind Power Performance Brochure (3.46MB PDF) Ordering Information Contact us about wind energy at GE

2.5 MW Series Wind Turbine

Product evolution - It is one of the things that GE does best. Especially when it comes to the next generation of wind turbines. With the expertise of GE’s engineering and global research team, a wealth of customer feedback, and extensive knowledge gained from manufacturing over 5,000 megawatt-plus wind turbines, our new onshore 2.5MW machine raises the bar when it comes to reliability and customer value.

Features & Benefits Improving on our 2.x MW Class design, GE’s new 2.5xl units are designed with an increased rotor size, offering higher energy capture, reliability and efficiency. Among its many benefits, the 2.5xl employs an efficient permanent magnet generator, enabling higher efficiency at low wind speeds, resulting in increased Annual Energy Yield. GE’s unique integrated suite of controls and electronics also provides a sophisticated set of grid-friendly benefits similar to conventional power plants. These controls enable wind turbines to meet grid codes and stay on-line supporting the grid, even during severe grid disturbances. Designed for advanced logistics, the nacelle and tower dimensions of the 2.5xl allow for transportation and installation procedures comparable to standard 1.5MW turbines. Learn about Wind Plant Peformance (498KB PDF) Learn more about our wind energy technology

Technical Drawing   Download More Information 3.6s Offshore Wind Turbine Brochure (711KB PDF) Ordering Information Contact us about wind energy at GE

 

 

Whisper Wind Turbine Tower Installation

 

 

 

Products

 

 

Norwin is conducting research, development and design of own technology for land based wind turbines and the two following models are currently available:

- Wind turbine design 225 kW class: 366 put in operation

- Wind turbine design 750 kW class: 37 put in operation

- A 1.5 to 1.7 MW wind turbine is presently under development and is expected to be ready in 2010

- A 15 to 20 kW wind turbine is presently under development and is expected to be ready in 2009

Sale and Manufacture of wind turbines takes place from own facilities and through partner agreements!

Technology cooperation with R&D communities and suppliers is part of our technology development!

Special project execution requiring expertise knowledge within load estimation and design i.e.: building integrated wind energy and hybrid systems is a specialty of Norwin

Further information on the types and systems are found from the following:

• NORWIN 750 kW WT with Active Stall regulation
• NORWIN 225 kW WT with Stall regulation
• Building Integrated Wind Turbines

 

NORWIN 47-ASR-750 kW

 

MAIN FEATURES OF DESIGN

 

Norwin 46/47-ASR-600/750 is an ASR regulated wind turbine with a rotor diameter of 46 or 47 m. The turbine uses LM 21.0P blades, which is the latest technological development from LM Glasfiber. The blades can be feathered to obtain optimal operational conditions at both at low and high wind speed. This system together with our intelligent control we call ASR - Active Stall Regulation.

 

ASR - Active Stall Regulation

 

The ASR wind turbines utilize the best things from both the stall- and the pitch regulated wind turbines. The ASR turbine has the same regulation possibilities as the pitch regulated turbine, but by using the stall properties of the blades the large load and power fluctuations that are typical for a pitch regulated machine is avoided.

 

Why ASR?

 

By using ASR a lot of advantages are gained that a normal stall regulated wind turbine cannot offer:

ASR will generally give a higher production because the blade angle is optimized according to the actual wind speed.

 

At high wind speed the power is stabilized because problems with air density changes, double-stall and change in grid frequency are eliminated. This means that stand still due to overproduction is avoided, and that the loads on individual components, i.e. gearbox and generator is minimized, resulting in a longer lifetime.

 

The possibility of feathering the blades at extreme wind speeds means that the characteristic extreme loads are decreased compared to a normal stall regulated turbine.

 

It is possible for the turbine to down-regulate the produced power if the local grid has high loading. However, this demands a special unit for grid surveillance.

 

With blade regulation it is possible to make a much smoother cut-in to the grid at startup, and cut-out at shut down. This will give much less noise on the grid in these situations and at the same time extend the lifetime of the turbine.

 

The possibility of reducing the power by feathering of the blades means that the switch over between the small and the large generator is taking place in a quiet and gentle manner.

 

The ASR system is under constant development and optimization i.e. through R&D activities supported by The Danish Energy Agency and the European Commission.

 

ASR and the future!

 

The wind turbine manufacturers know that the future in design of more efficient and more reliable wind turbines lies in the development of better control strategies and more effective blades. Using ASR the NORWIN turbine is in front in both areas - today and in the future. With the wind turbine as the centre, a long-term research and development program on the ASR controller is being conducted. Some of this work is made with co-financial support from the European Commission's R&D programmes. It is worth noting that not only the next generations of NORWIN turbines will benefit from this work. The wind turbines produced today can be upgraded with newer versions of 'intelligence'.

 

Brief descriptions of development work:

Power Optimisation:

 

The controller is developed to self-optimise the blade angle control for wind speeds below rated power. The main benefits are that no costly work and interference from personnel is needed during the process of pitch angle optimisation and that it is ensured that the turbine runs in the most optimal configuration. Practical tests have shown an energy production increase of more than 1%, after running a test version of the power optimisation system.

 

Load control:

 

The load on a wind turbine can vary a lot from site to site and development work is being conducted to develop a Load Control system where the turbine is not only controlled to reach the nominal power, but also is controlled according to the loading history. The objective of using such a system is to ensure the projected lifetime of major components or to enable us to use these to a maximum within the projected lifetime. The first phase of this work has been finalised, with the development of the fundamental control scheme for gearbox load control.

 

Laser Wind Measurements:

 

In co-operation with the National Institute of Ris� and others, the development of a laser-based device for measuring of the wind speed before it reaches the wind turbine and a control strategy to utilise this knowledge is being conducted. The potential of the system is to increase the turbine efficiency and reduce the loading by taking advantage of the knowledge about the incoming wind. Further the system could make it easier to make power curve measurements.

 

We do not stop here!

 

The blades have a crucial influence on the wind turbine performance and despite the fact we use some of the most modern and optimised blades we would like to do it even better in the future. For this reason NORWIN is participating in a project developing a blade especially made for optimal performance with the ASR control strategy. This means that the basic principles of ASR were taken into consideration when designing the blade. The first test set is now running on a NORWIN turbine. The work is supported by The Danish Energy Agency funds for Developing Renewable Energy.

 

Not all is new!

 

By using standard components both we and our customers gain two great advantages: You are guaranteed to get a well tested product and the customer is assured that spare parts will be available in 15 years, if it should be necessary. Examples on relatively standardised parts are: Gear, generator, main bearing, blade bearings, yaw bearing, yaw gearing, control modules and so on. It takes experience and knowledge about wind turbine technology to choose the right components and to combine these with the specially designed parts that a modern wind turbine also consists of in a way to achieve a product of high quality. That is why the 19 years of experience in construction and maintenance of wind turbines has been used in the development of the NORWIN 46-ASR-600 kW / 750 kW wind turbines.

 

FEATURES OF DESIGN

Rotor:

 

The blades are made by LM Glasfiber A/S. Each blade is mounted on an extender, - mounted on a four-point ball bearing,- mounted on the hub. Each blade has stays connected to the pitch mechanism inside the hub so that all three blades acts simultaneously when pitching. The pitch actuator is a hydraulic cylinder placed inside the hub. The hub is mounted to the forged flange of the main shaft with bolts.

 

Main frame:

 

The main frame is a relatively flat welded design, which provides access from the tower to the nacelle directly through a manhole in the frame.

 

Shaft, bearing and gearbox arrangement:

 

The rotor, shaft and gearbox arrangement is designed to be highly flexible for movements in the yaw and tilt directions. The main shaft is connected to the main frame at the front with a roller bearing and a bearing truss. The main bearing absorbs the axial loads of the rotor. The rear bearing is integrated in the gearbox, which is connected on both sides to the main frame with a support including a rubber element. In this way the system is supported at 3 places, making the forces run smoothly from the rotor and into the tower. A large cooler with external fan cools the gear oil while the oil is passing through a 10 micron filtering unit.

 

Generator arrangement:

 

The generator is mounted to the main frame behind the gear opposite to the main shaft and connected to the gear via a flexible coupling. The standard generator is an asynchronous double-wound, induction generator. Casing IP54. The isolation is in accordance with classification F, utilization with classification B.

 

Blade turning system:

 

The blade turning mechanism is placed inside the hub. The actuator is a hydraulic cylinder, supplied by either a hydraulic power package, including a proportional valve, placed in the nacelle for normal operation, or a accumulator system placed in the hub, for emergency operations. The position transducer is placed in the hub parallel to the cylinder. The power and control package has been placed in the hub, to insure that the system is easy to adjust and service. The hydraulic control lines from the power package to the hub, is transferred through a rotating union placed on the back of the gearbox. The necessary electrical control lines are transmitted through slip-rings also placed on the back of the gearbox. In an emergency situation, the primary supply of hydraulic pressure will come from hydraulic accumulators placed inside the hub. Placed here, the system is well protected against a fire in the nacelle, and the system will also work in case of a complete pressure drop in the power package. The power package including separate accumulator will serve as a secondary safety system.

 

Braking system:

 

The mechanical safety brake is mounted on the high-speed shaft of the gearbox. The �fail safe� spring type disk brake is activated instantly in an emergency situation. In the normal situation the mechanical brake is only used to hold the rotor, after the blades have brought it to stop. Hereby, heavy loads on the gearbox are avoided during braking. Activating the pitch system allows aerodynamic braking. At normal braking the blades are pitched to 20� to take the power from the rotor and slowly decrease the rotational speed. A while after the rotor has stopped the blades will return to the nominal position, to be ready for operation. During emergency braking the blades are feathered, to make it impossible for the rotor to catch speed even in an extreme wind situation, and at the same time to decrease the thrust on the rotor. When the blades are pitched to -85� the mechanical brake is retracted so that the rotor is able to run free. This is done to prevent high loads in the transmission system at extreme wind situations. Running free in the emergency pitch angle position the rotor will rotate slowly with a speed of up to 2 rpm.

 

Yaw system:

 

The yaw system is a combined yaw brake and active yawing system designed in a very flexible manner so that it is possible to add additional yaw brakes or motors if the turbine is to be erected on a very rough site. The connection between the nacelle and the tower is through a four-point ball bearing. The yaw drives are electrical driven standard units consisting of an electrical motor with brake included, a helical and a planetary gear. The number of yaw drives can be determined by the conditions on the site but is normally 4. Apart from the brakes in the yaw drives, a hydraulic actuated disk brake system with a number of positive brake caliber's is used. This system has a separate warning system for leakage. The yaw drives are actuated through soft starters, to equalize the torque between the motors, and to prevent a high peak torque in the starting situation.

 

Nacelle and cooling:

 

The nacelle is made of glass fiber with steel reinforcements, and mounted to the main frame with steel supports through rubber dampers. The nacelle will provide standing height so that servicing may take place in protected surroundings. Noise reducing ventilating ducts are integrated.

 

Cooling and ventilation are controlled for nacelle, gearbox, and generator. Through control of the cooling air to and from the gear and the generator, the nacelle temperature will generally be kept at a minimum of 7�C above outside temperature, thus preventing condensation and thereby corrosion.

 

Tower:

 

The tower is a closed, conical tube tower fabricated in steel with a door at the bottom of the tower, and internal ladder and platforms at the tower connections to ease service at the connections points.

 

Controller:

 

The main control panel is placed at the bottom of the tower. With the possibility of adjusting selected parameters, authorized personnel can change operational limits of the turbine directly on the front panel.

 

A stationary or portable additional control panel can be mounted and connected to the top box in the nacelle for manual control of the turbine, when servicing. A battery back up system supplies the emergency light.

 

Safety surveillance will monitor possible faults in the turbine and, if necessary, bring the turbine to a standstill. Should the turbine come to a standstill due to some unacceptable conditions, it will start up automatically when proper conditions have been restored, e.g., after grid failure. When faults require service, the turbine will not be able to start up again until the fault has been corrected.

 

One of the special features of the turbine is that it has a number of back-up functions built in, and that the controller utilizes the possibility to operate the turbine even if a secondary system has broken down. This system increases the availability and makes it easier to schedule service of the turbine. If such an error appears a message will appear on the screen and on a remote monitoring device.

 

The turbine is equipped with an external emergency system, working independently from the electronic control system supervising speed of rotor, nacelle vibrations and manual emergency push buttons. A circuit breaker is installed in the power section, disconnecting the turbine from the grid in case of overload current or short circuit current.

 

Noise:

 

According to experience, the high-speed shaft of the gearbox and the rotor itself are the sources of eventual noise problems from wind turbines. The rotor is the main source for broad-spectrum noise, where the main problem with the gear is pure tones. The gears used in the turbine are designed from state of the art knowledge about how to build low noise gears, and further, each gear is tested for noise and vibration before accepted and installed into the turbine. Ventilation air through the nacelle will go through noise damped ducts, damping the air borne noise.

 

1. Rotor system
2. Transmission
3. Yaw system and mainframe
4. Nacelle cover
5. Tower
6. Hydraulic station (not shown)
7. Generator
8. Pitch system

 

 

Downloads

Castle House London In this section you can find numerous different information for download. Most of it will require an Adobe pdf reader to be installed on your computer:

Follow these links (return to this menu by clicking at the headline):

1. NORWIN Company Information,
2. News,
3. Press releases,
4. NORWIN 750 kW Wind Turbine,
5. NORWIN 225 kW Wind Turbine,
6. Building Integrated Wind Turbines,
7. General Wind Turbine Information,
8. Customer support / project support,
9. NORWIN R&D Reports,

 

 

Company Information:

Description:	Document for download:	Size:
A short presentation of our company for printout!	NORWIN-at-a-GLANCE-05	238 kb

 

News:

Description:	Document for download:	Size:
Article from "Gulf Construction" on Bahrain World Trade Centre project May - 2008	GULF-CONSTRUCTION-NEWS-ARTICLE-MAY 2008	1754 kb
Article from "Gulf Daily News" on Bahrain World Trade Centre project April 09 - 2008	GULF-DAILY-NEWS-ARTICLE-090408	807 kb
Article from "Bahrain Tribune" on Bahrain World Trade Centre project April 09 - 2008	BAHRAIN-TRIBUNE-ARTICLE-090408	578 kb
Article from "Str�mstyrke" on Bahrain World Trade Centre project June 10 - 2009 (in Danish)	STROMSTYRKE-BAHRAIN-ARTICLE-100609	271 kb

 

Press releases:

Description:	Document for download:	Size:
First Press Realease on Bahrain World Trade Centre project: Oct. 10-2006	PR-BWTC-Ramboll-Norwin-01	35 kb
World's first integrated wind turbines inaugurated in Bahrain April 09 - 2008	BWTC Turbine Inauguration	27 kb

 

NORWIN 750 kW Wind Turbine:

Description:	Document for download:	Size:
DNV B Type Approval	B-DNV-218101-0	1069 kb
Technical datasheet:	N-NW47-TechData-07	171 kb
General wind turbine description:	N4647UKdes013	255 kb
Power curve for standard air density:	N-NW47-750-1225-03	74 kb
Noise emision data:	Noise-Emission-N47-ASR-600-750-01	105 kb
Lightning protection overview:	Lightning-protect-diagram-02	38 kb
About the control system:	N47-ASR Controller and monitoring 02	1.2 Mb
Electrical main diagram:	N47-600&750kW-690V-Main-Diagrams	242 kb
Basic document for foundation analysis	N47-Foundation-analysis-data-05	676 kb
Foundation loads 45 m hub height Wind Class IEC-1B	N47-45-IEC1B-FoundLoads-01	10 kb
Foundation loads 65 m hub height Wind Class IEC-2A	N47-65-IEC2A-FoundLoads-01	9 kb
Foundation loads 65 m hub height Wind Class IEC-1B	N47-65-IEC1B-FoundLoads-02	9 kb
Dimensions and weights for the turbine and the 65 m tower	Transport Dim&weight N47-02	138 kb
Dimensions and weight for the 45 m tower	Transport Dim&weight 45 m tower	9 kb

 

NORWIN 225 kW Wind Turbine:

Description:	Document for download:	Size:
Technical datasheet:	N-NW29-TechData-03	213 kb
General wind turbine description:	N29UKdes004	170 kb
Power curve for standard air density:	N-NW29-225-1225-02	43 kb
Noise emision data:	N29-225kW-Noise-Meas-Svallerup(DK)	643 kb
About the control system:	N29 Controller and monitoring 01	95 kb
Electrical main diagram:	N29-225kW-400V-50Hz-MainDiagrams-01	95 kb
Basic document for foundation analysis	N29-225kW-Foundation-analysis-data-02	135 kb
Standard foundation loads for 30 m hub height	N29-30-FoundLoads-01	6 kb
Standard foundation loads for 40 m hub height	N29-40-FoundLoads-01	6 kb

 

Building integrated wind turbines:

Description:	Document for download:	Size:
A short summary of the currently running Building Integrated Wind Turbine Projects	NORWIN-Building-Integrated-Wind-01	821 kb

 

General Wind Turbine Information:

Description:	Document for download:	Size:
No downloads currently available!

 

Customer support / project support:

Description:	Document for download:	Size:
Small guide to wind power power project development	PGuideWDevJan02	150 kb
Initial wind questionare for wind sites	N-WindQuest	80 kb

 

NORWIN R&D Reports:

Description:	Document for download:	Size:
Application and use of Stall Strips on wind turbine blades. In Danish. >>	Stall-Strips-R-970630-(DK)	737 kb
Advanced Condition Monitoring of Wind Turbines. >>	ACM Publ Final Report	179 kb
Expert Load Control and Power Optimization for Wind Turbines. >>	Expert WT Controller	640 kb
Use of Laser Anemometers for Wind Turbine Control. >>	Laser Anemometer	2.6 Mb
Optimering af Vinge til Aktivt Stall Reguleret Vindm�lle. In Danish. >>	Risoe-R-1132(DA)	336 kb
Design of a 21 m Blade Optimized for Active Stall Regulation. >>	Risoe-R-1374(en)	1.3 Mb

 

Whisper Wind Turbine   llc. 

Our patented vertical axis wind turbine will provide superior, reliable service for many years.  It has taken much time to research, design, develop and bring to market.  It is simple in design and will produce reliable electric production for your home or small business.  

  

Blackbird® 1500 Package Cost:      $13,900.00 - See package details below


Blackbird® 1500 Package includes:

• Blackbird 1500  (Vertical Axis Wind Turbine)  

• 1.8 kw 3 Phase AC Alternator
• 4.5 kw Wind Interface
• 4.5 kw Diversion Load
• 120/240  3 kw DC/AC Inverter
• 4 Fully Adjustable Roof Mounting Legs
• 20 Year Limited Warrantee

Construction Features include

• All steel, fully welded frame
      - We will happily provide you with a choice of colors
      - Our stand color is black
• Stainless steel, fully welded rotor supports
      - Stainless steel will not rust and will provide years of reliable service
      - It also looks great
• Stainless steel turbine shaft
      - Stainless steel will not rust and will provide years of reliable service
      - It also looks great
• Polycarbonate rotors
      - Polycarbonate is is extremely durable and work in extreme temperature ranges
      - We also offer 3 choices of colors
• Sealed bearings with grease fittings, for long life
      - These are easy to maintain via the accessible grease fitting
• Stainless steel balanced drive shaft
      - The shaft is balanced for vibration free performance
      - The solid Stainless steel shaft also acts as a flywheel thereby improving efficiency
• Fully assembled for ease of installation
      - We ship your Blackbird 1500 fully assembled for easy installation
      - Easy installation means reduced installation costs
      - Simply level on the rooftop set the adjustable roof mounting legs and bolt to your roof

Operating Features include

• Silent operation
      - The Blackbird 1500 works at a slow rotational speed
      - Slow speed and sealed ball bearing make for a very quiet running turbine
      - You can stand right next to the Blackbird1500 and you not hear it turning
• Vibration free
      - The precision balanced drive shaft and fully welded construction deliver smooth performance
• Low rpm
      - This means, quiet, vibration free operation
• Low start up in winds as low as 5 mph
      - The Blackbird 1500 will produce 0.6 kw in a 5 mph breeze
      - This means efficiency, power production at start up speed 
• Will not over rotate - no need for braking
      - The patented design limits the rotation by increased drag the offset rotor design
• Omni directional - accepts wind from any direction
      - The Blackbird 1500 rotates on a vertical axis allowing is to take winds from all directions    
• Accepts turbulent roof top winds
      -  Because the Blackbird 1500 works on drag principles it will work with turbulent winds
      - Other turbines operate on lift which needs strong steady wind  
• Roof mounting - no need for unsightly/costly towers
      - Towers are costly and increase installation costs
      - Towers can also be unsightly
      - In many communities there are restrictions that prohibit towers and guy wires 
      - The Blackbird 1500 is often permitted when other turbines are not
      - Rooftop mounting makes the Blackbird 1500 perfect for city, rural, or suburban homes
• Designed specifically for roof top mounting on most roofs
      - The Blackbird 1500 can be mounted on virtually all roofs
      - It has fully adjustable legs that swivel to accommodate all different roof slopes
      - Simply level on your roof, set the legs and bolt onto you roof 
• Pleasant appearance for residential acceptability
      - Many customers have commented that the Blackbird 1500 looks like a sculpture
      - Imagine the stainless steel and polycarbonate shimmering in the sun as it gently spins 
• Low maintenance
      - Just grease the bearings once a year and your good to go
• Relatively light weight - only 250 lbs.
      - At only 250 lbs. most roofs can easily support the weight 
• Safe for wildlife - it appears as a solid object to birds
      - The low rotational speed and vertical axis make the Blackbird 1500 appear as a solid object to birds and other wildlife

Specifications

Height:
    81 inches - as tall as the front door of your house

Width:
    36 inches - as wide as the front door of your house (most houses)

Kilowatt Production:
    1.5 kw at rated speed of 13 mph winds

Mounting:
    Specially designed for roof mounting on most roofs. Can be mounted on  roofs with a 12 x 12 pitch. Can also be mounted in the valley of a roof or on a flat roof. Adjustable roof mounting legs included.

Weight:
    250 pounds including the alternator

Color:
    Standard color is black, however other colors are available upon request. The poly-carbonate rotors are smoke and are available in clear and white.

Not Included

• State / local fees
• Utility connection fees or additional utility required equipment
• Installation - Must be installed by a certified wind installer
• Sales Taxes within NY State
• Shipping and Handling - vary by state and or country

To purchase simply contact us by clicking on the link below. 

order@whisperwindturbine.com

We will accept personal checks or money orders.  

We apologize as we do not accept credit cards.

 

• Whisper Wind Turbine Generators H40, H80, 175
•  now are Whisper 100, Whisper 200, Whisper 500

 

Whisper 100 and 200 can beVoltage Configured, new Four Bearing Spindle, Upgraded Yaw Shaft, now a very Robust Wind Turbine

Patented Angle governor--for High Winds

                      

Whisper 100 formerly H-40 is a 900 WATT

The Whisper 100 is designed to operate in a site with medium to high wind speed averages of 12 mph, 5.4 m/s, and greater. The Whisper 100 provides 100+ kWh per month, 3.4 kWh per day, in a 12 mph average wind speed location. The Whisper 100, with its 7 ft. (2.1m) rotor diameter and 40 sq. ft. swept area, is rugged enough for extreme environments.

The redesigned Whisper 100 turbine incorporates a permanent magnet brushless alternator, which combined with Whisper's high efficiency composite airfoil blade design, delivers 900 watts peak power at 28 mph (12.5 m/s).

Applications - Stand-alone or hybrid Telecommunication applications, remote home and ranch applications, and off grid living.

Manual ►

spec sheet►

    Specifications:

    Rotor diameter: 7' (2.1 meters)
    Weight: 47 lbs (21 kg)
    Mount: 2.5" Schedule 40
    Start-Up wind speed: 7.5 mph (3.4 m/s)
    Voltage: 12, 24, 36, 48 VDC
    Peak Power: 900 Watts @ 28 mph (12.5 m/s)

New Controller - 12-48vdc may be configured on the controller.The Whisper 100 comes with the new Controller that offers greater reliability and superior control for battery charging. Its compact, safe cabinet design features easily settable voltage regulation points, load dump and load dump isolation from the battery. The price of the system includes the H100 turbine and Controller.

controller available without wind turbine at this location:►

Whisper 500™ by Southwest Windpower

Manual | Specifications | Towers

At a Glance

Kilowatt Hours/Month: Rotor Diameter: Voltage: Rated Power: Turbine Controller: Warranty:

538 kWh/mo at 12 mph (5.4 m/s) 15 feet (4.5 m) 24, 36, 48 VDC (high voltage avail.) 3000 watts at 24 mph (10.5 m/s) Whisper Charge Controller (included) 5 year limited warranty

Full Specifications | Where to Buy

Monthly Energy
 

Whisper 500: Serious Energy for Remote Locations

The robust Whisper 500 delivers serious energy for your remote power needs. The Whisper 500 performs well in harsh, high wind environments with it’s two-bladed, fiberglass-reinforced design. Patented side furling overspeed protection optimizes output at any wind speed. Assuming a 12 mph (5.4 m/s) wind, a Whisper 500 will produce as much as 500 kWh per month. That is enough energy to power the about half the needs of average California home.

Maximum Output in Any Wind

Exclusive to the Whisper, the side-furling angle-governor protects the turbine in high winds by turning the alternator and blades out of the wind, reducing turbine exposure. This angle-governor lets the Whisper 500 continue to safely spin and deliver energy even in high winds. 

Whisper Controller and Digital Display

The Whisper 500 ships complete with a controller and diversion load, ensuring quiet, safe operation of your wind turbine when the batteries are charged. The controller installs in minutes and it protects both your wind turbine and battery and easily fits inside your battery room.

Add the optional LCD display to instantly monitor real-time data on the performance of your Whisper 500. The display can be mounted on the controller or up to 1000 feet (300 meters) away, so you can monitor performance in the comfort of your home. You can even add an anemometer feed to compare wind speed with turbine output to make sure you are getting the most from your Whisper 500.

Towers and Installation

Southwest Windpower offers tower kits that include all the cables and fasteners you will need. No welding or machining is required – you just need to obtain pipe material and power wires. We sell anchors separately.

The Whisper 500 is NOT for the novice. Installation of the towers requires concrete foundations and at times a crane to lift the wind turbine into place.

For more information, see the Whisper 500 tower manuals:

• 500 30 ft Manual (PDF)
• 500 42 ft Manual (PDF)
• 500 70 ft Manual (PDF)

Year-Round Energy

Whisper systems combine well with photovoltaic solar panels to balance out fluctuating solar and wind resources. Generally, winter months provide more wind and less sunlight, while summer months provide more sunlight but less wind. A hybrid system using a Whisper wind generator provides year-round energy production.

Where to Buy

Our network of dealers around the world are ready to take your order. Please see our dealer locator to find the dealer closest to you.

 

Wind Energy Bangladesh

Click here to find Wind  Energy Resources Potentials in Bangladesh :  Perspective:

 

 

Wind energy has been used in Denmark for thousands of years for milling grain, pumping water and other mechanical power applications. In Bangladesh comprehensive study to explore wind power is not yet completed. However LGED in collaboration with Bangladesh University of Engineering and Technology (BUET) has installed twenty Wind Monitoring Stations (WMS) throughout the country. Locations of these WMSs are illustrated below. Data collection is now on going. Objective of the study is to deliver Wind Energy Resource Mapping (WERM) for the country.

 

 

Primary result of this study indicates a limited prospects of wind resources in the main land because average velocity was found about 3-4 ms-1, however in the coastal belt for a period of five to six months wind speed was found 5-7 ms-1. Therefore low cut-in speed wind turbine may be useful in that region. Furthermore Bangladesh has about 700km long coastal belt, around 200km hilly coast line and about 50 offshore islands where wind energy could be a promising option.

Again BCSIR conducted a study at the St. Martin’s Island. Their report [link to PDF report] shows a limited prospect of wind energy at the island.

Furthermore Bangladesh Renewable Energy Research Centre (RERC) has conducted solar and wind energy resource assessment through SWERA project. Output of the study has been illustrated in the following map.

Bangladesh Power Development Board (PDB) has installed 900kW wind generator at Muhori dam in Feni district in 2005. PDB is now implementing 1MW wind generator at Kutubdia island. On the other hand LGED has installed country’s first Wind-Solar hybrid power unit at the St. Martin’s Island in 2006.

Click here to find Wind  Energy Resources Potentials in Bangladesh :