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FLYING HIGH Wind turbines combined with pumped-storage technology: With the new “water battery”, the German-based construction company Max Bögl is setting new standards for the energy revolution. LAPP is providing the cabling for the mega-structures in Gaildorf near Stuttgart, Germany. / //////////////////////////////////////////////////////////////////////////////////////////

power or electricity in the grid, this electrical energy is used to pump water up and into these two reservoirs. When electricity in the grid is scarce, the water drops 650 feet down into the valley and powers two Voith turbines. The principle of the pumped-storage power plant is almost 100 years old. What’s new here is that a plant for generating renewable energy and a pumped-storage system are at the same location; in fact they are housed in the same construction. The base of the turbine - the active reservoir - can hold over 1.8 million gallons of water, while also providing a welcome 131 feet of extra height. The larger outer reservoir, known as the passive reservoir, holds 11.3 million gallons. The concrete structure is a masterpiece, using materials and construction techniques that have never been used before in this combination anywhere in the world. “We are keeping the construction secret,” says Site manager Markus Meyer. The “water batteries” are connected by a 7-foot thick pipe that runs into the valley under the bed of the River Kocher and into a specially created lower reservoir. Upon taking up full operation in late 2017, the system was filled with 42.3 million gallons of water from the river. GE SUPPLIES WIND ENERGY PLANTS FOR THE GAILDORF PROJECT The combination of wind energy and pumped- storage technology in this project is complex and extremely challenging. GE Renewable Energy supplied the four wind energy plants, each with a rating of 3.4 megawatts. The company has stringent requirements in

It is a sight to see: A gigantic tower with a crane that appears to be floating completely free over 300 feet up and almost disappearing into the clouds over the Limpurg hills. If you could imagine the perfect location for a wind turbine, it would probably look a lot like this. Soon after our visit, the giant tower was crowned with a nacelle and three rotor blades. They convert the power of the wind into 3.4 megawatts of electrical power. The turbine is designed to harvest more than 10 gigawatt hours of energy per year, enough to supply around 2500 four-person households. The three other wind turbines, which stand like sentinels on the hill a few hundred feet apart and are only a few metres lower, have an identical design and deliver the same power and energy. RECORD SETTING The plant in Gaildorf near Schwäbisch Hall is an ambitious contribution to the energy revolution. It has immediately set several records: The highest of the four turbines is currently the highest in the world, with its hub at 584 feet and the tip of the rotor reaching to a height of 808 feet, thanks to the hybrid concrete (lower section) and steel (upper section) tower. Every foot counts, as it increases the energy yield. The towers were erected with the world’s highest mobile crane - a planning and logistical master-stroke by the main contractor, Max Bögl Wind AG from Neumarkt in Bavaria. The company constructed the plant and also operates it - something completely new in the wind power sector. Even a layman can see that there is something different about the huge towers. The lower section has a significantly greater diameter than the upper section of the tower and stands in a huge circular reservoir. When there is excess wind

The world’s highest wind power plants are located in Gaildorf near Stuttgart - and the cables come from LAPP.

LAPP 29 Hanover Road, Florham Park, NJ 07932 T. 800 774 3539

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