Hybrid Tower System Max Bgl Progress is built on ideas.

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Energy has been the key element in our standard of living for over six decades. Without its permanent use, we would not be able to maintain our position as an industrial nation. The careful and sus tainable use of this energy will be our societys key task in the future.

The goal of the German federal government is to increase the proportion of electricity created from renewable energy sources from 32 percent today to 4045 percent by the year 2025, and in so doing replace the use of conventional power stations. Only in this way will we be able to ensure the preservation of our environment and secure our standards of living.

Here at Max Bgl, we are rising to the challenges that the energy revolution is bringing with the development of renewable energies. The fact that we are well positioned in this context is proven by

our wide ranging knowhow in the development, planning and construction of large scale wind power systems. Our service portfolio is rounded out with the dismantling of old installations (repowering) and well as the provision of all services around the technical and commercial management of wind farms. Through the entire process chain, we place high value on sustainability.

Made of prestressed concrete and steel, our hybrid wind energy towers ensure greater efficiency and energy yield on land. Up to 164 m high, the multimegawatt wind turbine towers are manufactured at the companys own production locations in Sengenthal and Osterrnfeld on the Kiel Canal in SchleswigHolstein, North Germany.

We have introduced a modification to our established hybrid tower in order to reach hub heights of 160m and more. System 160+ thus includes a

new segment geometry in the prestressed concrete tower base section and cylindrical rings used as middle sections to gain height. The concrete segments can be produced directly on site while complying with high quality standards, ensuring that our hybrid tower can be used worldwide. The mobile factory concept that we use to produce smallersized concrete sections enables us to ensure greater local content.

Stefan BglMember of the Board Max Bgl Wind AG

Johann BglShareholder

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Creating value through wind power a complex proposition

has ensured that priority has been given to energy feedin from renewable energies.

In this context, by producing environmentally friendly energy, modern wind farms not only help with climate protection. As decentralised power stations they also represent value added for the region as well. Along with the creation of new jobs, their local districts gain additional business taxes, which are not imposed locally

In 2013, the German government decided to phase out nuclear energy. Ever since then, energy revolution has been the phrase which is used to describe the new orientation of energy policy in Germany. By 2025, the proportion of electricity created from renewable sources should increase from the current 32 percent to reach 4045 percent. The 5560 percent mark should be reached by the year 2035. The German Renewable Energy Law (EEG)

with conventional, largescale power stations. The use of wind power therefore represents the economically beneficial estab lishment of a new business.

From the identification of suitable locations and the technical and commercial planning of the wind farm, to the approvals procedure, the construction, connecting with the power grid and the operation of the power plant: a wind power

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Modern, high performance wind power systems, as shown here at Winnberg in the district of Neumarkt, supply citizens with clean and safe energy.

project is a complex project. Experience and professional knowledge determine the success of the realisation. In this context, interfaces between the project phases and the project participants may present risks that can only be managed effectively with a professional form of project management. In this area, Max Bgl is able to support you as a competent, reliable and high performing partner whether it regards the selection of possible locations or checking the technical

and commercial feasibility of existing project ideas.

Once the decision to construct a wind farm has been taken, we are able to accompany you and support you throughout the duration of the full project as required. Here, you are able to rely on our wideranging knowhow surrounding the development, planning and realisation of even the biggest wind power systems. Under the inclusion of the local district, we complete a detailed project

planning together with our specialists, and will be pleased to include engineering firms from your local region as required. On the basis of our findings we then create a costeffective master plan including a financing proposal with the participation of local credit institutions. Our professionals and selected external specialists support you during all of the phases of the approvals process.

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One of the most important economic goals of the wind farm operator is to earn as much energy from the wind as possible. A high electricity yield, especially in inland locations where wind speeds are often lower, is best achieved with wind power systems that combine considerable hub heights with large rotors.

On the one hand, this is because at the atmospheric strata closer to the ground, the wind speed increases with height, and on the other hand, because of the physicaltechnical possibilities surrounding the use of the wind energy. The electrical power P [kW] increases exponentially to the power of three with increases in the wind speed. It furthermore increases almost to the power of two (square) as the diame

ter of the rotors increases. In general, the following rule of thumb applies: every meter gained in height increases the annual electricity yield by 0.5 to 1 per cent.

Max Bgl hybrid towers enable maximum hub heights to be achieved, so that the latest, maximumperformance wind turbines in the world can make full use of wind potential.

Making full use of the wind potential

Wind power systems with high hub heights and large rotors enable a high electricity yield.

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Max Bgl is one of the leading producers of fabricated products in Germany. In close co operation with its inhouse steel and plant engineering and research and development divisions, it was in 2010 that the company group first built a hybrid wind turbine in a combined prestressed concrete and steel construction for what was then one of the most powerful onshore wind power

systems in the 3MW class, an REpower with 3.4 M with a hub height of 128 m.

Today, Max Bgl Wind AG supplies different versions of this tower type from serial production to renowned wind turbine manufacturers, offering different hub heights between 123 and 164m. Max Bgl has done much to prepare for the future to ensure that it can

readily respond to the constant challenges and the complexity in the wind power sector.

Greater energy output over 20 years with an increase in hub height

The Hybrid Tower System Max Bgl

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120 m 130 m 140 m 150 m 160 m

Source: Max Bgl Wind AG

Location 1 / Turbine Type X

Location 2 / Turbine Type XLocation 1 / Turbine Type Y

Location 2 / Turbine Type Y

The graph compares two different turbine types at two locations. The result clearly indicates a greater yield over a period of 20 years when the hub height is increased.

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The drive and motivation for the development of the Hybrid Tower structures for wind energy systems resulted from the considerable expertise of the Max Bgl Group in the construction and manufacturing of highprecision concrete components. The concrete rings, each of which is 3.8 m in height and 30 cm thick, are produced in the companys

finished components factories in Sengenthal and Osterrnfeld and depending on height and weight can be produced either as a complete ring or in several steel reinforced concrete segments. This range of conical and cylin drical rings can be combined according to a modular system to create concrete towers of different height and geometry. Taking the economic

aspects into account, a wide range of different tower versions can be designed in exact accordance with the specialist staticdynamic requirements of every modern wind turbine in this way.

In preparation for their subsequent assembly on the building site, the factorymade concrete rings are processed to their

Concrete tower production

The pre-cast concrete components for the hybrid towers are shipped from the produc-tion site near the coast in Osterrnfeld in Schleswig-Holstein via the Kiel canal for the installation of wind power systems in North Germany and Scandinavia.

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The Hybrid Tower segments made from pre-stressed concrete and steel are precisely manufactured at the modern production halls in the prefabricated parts and steel and plant construction facilities at the Max Bgl headquarters in Sengenthal.

exact dimensions on their upper and underside using a CNC grinding machine. In a second work sequence, a specially coloured coating system is then applied to the vertical exterior surfaces of the ring. In this way, during the subsequent construction of the tower, the finished rings can be simply placed on top of each other in dry joins without mortar or a smoothing layer.

The factory production also guarantees the consistent