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The team

Creating a unique new wind turbine in less than two years from idea to functioning prototype is a team effort. The EN-128/3.6 PP 2B has been developed at Envision Energy’s Global Innovation Centre in Denmark by a handpicked team of engineers with vast experience from the wind turbine industry. Here you can meet some of the key players.

Michael Friedrich, Chief Wind Turbine Engineer

It’s fascinating to be able to control the strong powers of the wind.
As chief wind turbine engineer Michael Friedrich he knows the enormous potential of wind power – drawing on many years’ experience both in engineering and at the helm of his sailboat.

Jan Bisgaard, Senior Verification Engineer

I have moved from designing wind turbines to facilitating the process.
For Senior Verification Engineer Jan Bisgaard the real work begins when the EN-128/3.6 PP 2B is operational – testing and verifying that the design and construction promises the concept to translate into business value.

Peter Grabau, Chief Engineer, blades design

If the blades are good, the turbine will usually be good.
As chief engineer, blades design, Peter Grabau is one of the pivotal figures in designing and constructing the EN-128/3.6 PP 2B – the world’s first Two Bladed Partial Pitch Wind Turbine. Luckily aerodynamics is a passion of his – also in his spare time.

The design

The Design of the turbine is based on two distinct features setting the seeds for a new way of thinking a well-balanced turbine and business case. The turbine has a design based on Two Blades and a Partial Pitch generating the power similar to conventional Three Bladed turbines. The turbine is designed to stabilize the rotor in a nearby horizontal by splitting the aerodynamic loads over the rotor plane. This will give a positive impact on the business case and CO2 emissions as the material consumption will be minimized. This to the effectively decreased transfer of extreme loads to towers and foundations.

Two bladed design

The Two Bladed wind turbine design is a proven technology although seldom at the scale of the EN-128/3.6 PP 2B turbine. The combination of the Two Bladed Design and the Partial Pitch Technology promises load reduction and thus improvements in COE (cost of energy).
The competitiveness comes from the value creation gained through lighter structures, tower, foundation, standard transports and cranes, robustness towards typhoon wind impact, easy customer adaptions, modular concept with higher profitability and less risk.

The combination of the two bladed design and partial pitch technology promises load reduction and value creation during the whole manufacturing and assembly process. But will the theory work in reality? In this documentation of the first wind tunnel test of a scale model of the GC1, engineers Peter Grabau and Michael Friedrich perform a reality check of the theory.

Partial pitch

The key innovative element in the EN-128/3.6 PP 2B turbine is the Partial Pitch. No other commercial wind turbine has this technology and design. The Partial Pitch enables the turbine to pitch the outer section of the blades, decreasing the extreme loads from the wind on tower and foundation. Especially in the event of a large degree of yaw error the loads are significantly reduced, and this is of great value at typhoon sites.
Another great advantage in the EN-128/3.6 PP 2B design is that Envision will be able to customize the rotor size to the clients’ needs at a specific site just by adapting the inner blade section. This does not require huge new moulds and associated costs.

The illustrations

The company

Envision Energy is a world’s leading intelligent energy service expert. Our business covers designing and manufacturing smart wind turbines, software services of smart wind farms, diagnostic and technical services, integrated project management services, asset management services and energy investment services.
Envision Energy is one of the leading wind turbine manufacturers in China and also an innovative company with an ambition to create smart solutions.

With headquarters in Jiangyin nearby Shanghai in China, Envision is located in the very heart of China’s development center of products and services for renewable energy. 65% of the area’s revenue derives from products and services for the wind energy industry both in Asia, America and Europe.
In 2009 Envision Energy established its Global Innovation Centre in Denmark with the same ambition to be in the heart of the wind energy industry in Europe. Here is an opportunity to create a strong development profile for both offshore and onshore wind turbines.