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cEfficient Wind Power from the Evance R9000 Wind Power Generator
 

 The Evance  R9000 is probably the most sought after small wind turbine available. Being the "next generation" of small wind turbines, it fully integrates the very best of existing technologies with major new patented innovations. The result is an attractive turbine with uncompromising performance and excellent reliability. The 'Evance R9000’ is even quieter, more efficient and more robust than the highly popular Iskra AT5-1. It is also easier to install and service whilst retaining its good looks!

Evance wind turbines are the most efficient, cost-effective small wind turbines available.

Designed as nature intended, their turbines work with the wind to capture more energy at lower wind speeds. The result is quiet, more efficient operation. Their design goes beyond simple ergonomics to guarantee your turbine makes an elegant addition to any surroundings, rather than an eyesore.

The Evance R9000 is designed for schools, farms, rural homes and light commercial applications.

Click 'More' below for details of the Evance R9000

“We wanted a wind turbine that could produce enough to make a big difference to our energy bills and give us the chance of another income. With such a big investment we did a lot of research and that has paid off. Its performance has been fantastic”  Mr. Bronte-Stewart owner of a Gaia133-11kW Small Wind Turbine in Ayrshire

The Gaia 11kW turbine has a very large blade with a diameter of some 13m. This gives it exceptional low wind speed performance at sites typically of the majority of lowland areas of the UK.

With 150 wind turbines already installed, the Gaia 133 is a well established and tested design with a 10 year record of reliable operation. 
 

The Endurance E-3120 is a 55kW downwind machine with a 30 year design life and 5 year warranty. It can out perform other wind turbines rated at 80kW.

The Endurance E-3120 Wind Turbine is designed for farms, irrigation pivots, schools, hospitals, manufacturing and fabrication companies, and any other applications requiring 125,000 to 250,000 kWh per year of electricity. Spinning at a low rotor speed, the 19.2m rotor diameter is designed specifically for higher efficiency in wind speed conditions usually experienced in the UK.

Wind power provides electricity for individual or multiple buildings with any 'excess' power being sold back to the National Grid. On Farms, because wind turbines take up little space, renewable energy is produced without compromising valuable farmland.



The photograph shows the First Endurance E-3120 to be installed in the UK (Devon). Click on the photograph to watch a video of the installation.

The Renewable Energy Cabin (TREC) is an innovative, stand alone, classroom in which students can study how renewable energy works and investigate arguments for and against the various renewable technologies.

Developed in Partnership with King's College Taunton with funding from the Royal Society the wooden cabin is supplied with various options for the study of renewable technologies, sustainability and the environment in line with the requirements of the National Curriculum.




Click on the cabin on the left to see a video of TREC.

TREC will be launched later in 2010 - for initial enquiries please contact Greenthinking.

Originally developed with NASA funding, the Northern Power 100 (previously known as the Northwind 100) put reliability and performance at a premium.

At 100 kilowatts of rated power, the Northern Power 100 is a technological masterpiece with its innovative gearless design, best-in-class reliability, and pleasing aesthetics. The Northern Power 100 is optimized for low wind speeds, so you don’t have to live in a wind tunnel to benefit from wind power. The turbine begins making power at wind speeds as low as 3 meters per second (6.7 mph) and can provide clear economic benefits in all kinds of wind situations.

An engineering advancement in simplicity and precision, the Permanent Magnet Direct Drive technology maximizes energy capture and outperforms conventional gearbox designs. The state-of-the-art power converter design provides smooth, clean power to local grids, simplifying grid interconnect and adding to grid stability to make the Northern Power 100 the best choice for a variety of applications.

For more information:

Call: 01823 680751

The XZERES 442SR is designed to generate low cost energy through efficiency, reliability, and longevity even on a single or dual phase electricity supply. Its simple design limits moving parts to reduce service and maintenance costs, as well as allow for easy installation.

The XZERES 442SR gets its name from its large swept area of 442 sq ft. Capacity of a wind turbine tells very little of its efficiency or energy production potential, whereas swept area is directly related to energy production. By focusing on performance and reliability the XZERES 442SR provides an excellent return on your investment.

• Rotor Diameter 7.2 m (23.6 ft)
• Swept Area 41 sq m (442 sq ft)
• Peak Power 12 kW @ 14 m/s (30mph)
• Rated Power 10 kW @ 11 m/s (25 mph)
• Cut-in Speed 2.2 m/s (5 mph)
• Blades 3-blade, upwind
• Body ductile iron casting and steel
• Alternator 3 phase, neodymium permanent magnet
• Tower-top Weight 725 kg (1598 lb)
• Annual Output (Estimated) 24,840 kWh @ 6 m/s (13.4mph) 

Did you know that you are paid for all the electricity that you generate, including the electricity that you use? To find out more please see our FAQ page.

Blade / Rotor
The WTN 250 is equipped with a 3-blade upwind stall regulated rotor. The blades are made of reinforced polyester and are equipped with "fail-safe" tip-brakes, which are activated simultaneously by centrifugal forces. With a blade length of 13.4 m and a diameter of 30 m the rotor of the WTN 250 has a swept area of 707 m². The rotor speed is 40 rpm.

Hub
The hub is made of steel and mounted to the rotor shaft-flange. Correction of the pitch angel of the blades is possible by oval holes in the blade flanges.

Main shaft
The main shaft is made of high-grade alloyed steel. It is mounted in two bearings, able to transfer all forces and moments to frame and gear.

Main bearings
Two grease lubricated bearings are the basis for a nearly noiseless operation of the main shaft.

Gearbox
A heavy three-stage helical gear transforms the 40 revolutions of the rotor to the 1500-rpm of the generator. This gear is specially designed for the WTN 250 with a gear ratio of 1:37.8.

Coupling
The power of the rotor, transformed in the gearbox, is transmitted to the generator by an elastic coupling. This prevents vibrations from reaching the generator bearings, reducing wear and extending their life.

Brakes and emergency brake system
The turbine is equipped with two (2) independent fail-safe systems. The blades are equipped with a simultaneously activated safety tip-brake and the WTG is also equipped with a disc brake. The disc braking mechanism is supplied through two hydraulic fail-safe brake callipers, which are activated through a loss of supply (grid) voltage. In normal operation the tip-brakes are held in position by a hydraulic cylinder. In emergency situations a hydraulic valve is activated by centrifugal forces, and both brake systems are engaged, independent of each other.

Generator
The generator is a pole-changing asynchronous machine with a nominal output of 250 kW at 1500 rpm respectively 50 kW at 1000 rpm. It operates at 400V AC level. A ventilator cools the outside of the machine.

Yaw-System
The yaw-system is representing the main advantage in modern wind technology and makes the WTN 250 superior, compared with other conventional engineering in the wind industry.

The well tested system has been carefully designed to arrange the gears in such a way to eliminate space. This yaw gear system incorporates both a damping system to decrease forces induced by the turning forces of the rotor, and a brake system, while the yaw motors are stopped. This system is ideally suited for WTG`s installed in multiples (wind farm applications) where the shadow effect of upwind placed wind turbines exposes them to dynamic turning loads. The yaw system also effects automatic untwisting of the cables, and has an additional twisted cable switch for more safety.

Nacelle
The hot dip galvanized nacelle frame is constructed of welded steel beams that support the main shaft, gear, generator etc. The yaw ring is fitted to the bottom of the frame allowing connection to the tower. The nacelle can be reached by a ladder inside the tower. The cover is made of galvanized sheets of steel.

Tower
The lattice tower is a new design especially designed to aid shipping at low cost. All parts of the turbine can be fitted inside a 40ft container.  At a height of 50m the rotor of the turbine is at an height of lower turbulence increasing the output and the service life of the turbine. A microprocessor control system is placed at the bottom of the tower in a special housing. A lockable door prevents unauthorized access. The turbine comes equipped with safety belt and safety line, which provides a safety climbing while installation and maintenance.

Control panel
All functions of the wind turbine are controlled by means of a well tested microprocessor. While the turbine is operating and connected to the grid, the computer stores data relating to the operation of the turbine. If multiple turbines are installed at a site, the turbines can be linked up to a computer management system. This design makes it possible to retrieve actual performance data from the wind turbines allowing remote operation and management. Information provided by the microprocessor includes:

- Grid control of: Voltage, Frequency, Phase equality
- Over speed control on rotor that activates disc brake
- Thermal sensor in generator
- Vibration sensor
- Automatic untwisting of cables
- Thermal relay for yaw gear motor
- Automatic stop for worn brake pads
- Automatic start-up in the event of grid failure
- Self-diagnostic in case of failure. Display indicates failure code.
- Generator speed
- Rotor speed
- Yawing
- Over speed

The control system also ensures gradual grid hook-up via thyristors on all three phases. The phase compensation is included in the main panel and allows a Cos. phi above 0.9. All electrical components are protected against lightning. 

More information on the WTN 500 kW Wind Turbine to follow.