EXHIBITIONS


Computational Fluid Dynamics (CFD) calculation programs and by taking existing model test results from the standard valve disc geometry as a basis. Because of the high number of daily transitions in hydroelectric power plants, valves are highly stressed during operation and rules must be adhered to when selecting a valve. Suitable valves, regular maintenance, and, when necessary, overhauling are a must. High quality products are requested from plant engineers and valve manufacturers on every continent. Especially since the potential is often far from being exhausted. Some continents, for example Africa, are becoming more conscious. The Lauca hydroelectric facility, under construction on Angola’s River Cuanza is due to start operation in 2017. The facility will boast two turbines. Andritz Hydro received the corresponding order, which lies in the lower three-digit million euro range. The order includes six Francis turbines, each with


an output of 340 megawatts, as well as generators and additional equipment.


India and Nepal have lots of hydropower potential India also has a large reserve of energy through hydropower. Nevertheless, of the potential 150,000 megawatt hours, only a quarter is being utilised. Time to act: The Indian government intends to increase the share of hydropower in the energy mix from the current 25 to 40 percent in the medium term. By doing so, they hope to lessen the number of blackouts and improve the stability of the supply network. This gave Voith India the chance to land a lucrative contract for the hydropower plant in Omkareshwar. Voith installed eight Francis turbines, including generator busducts and auxiliary systems. Each unit has a capacity of 65 megawatts.


Even Nepal has a huge potential for hydropower (40,000 MW). For the Rasuwaghadi plant in Nepal


Voith will supply a complete water- to-wire solution including three 37 MW vertical Francis turbines, the generators as well as automation systems and balance-of-plant equipment. The project is located in the North of Nepal, around 150 kilometres from the capital Kathmandu.


First Tidal Lagoon


Hydroelectric Power Station An unusual order worth approximately 250 million euros was awarded to Andritz Hydro. The world’s first tidal lagoon hydropower project is being built in Swansea Bay, Wales, UK. It is expected to supply more than 155,000 households with electricity. Unlike other tidal power plants, no natural bay or estuary is separated from the open sea, but instead a man-made, harbour type structure will close off a tidal sea area, creating an energy-generating lagoon.


As the sea outside the


breakwater rises and is held back a head is created and once a sufficient head height is reached sluice gates are opened and water flows into the lagoon through 16 turbines to generate electricity. This process then occurs in reverse on the ebb tide, as sea levels start to fall and a tidal head is created by holding water back within the lagoon.


The plant will contribute significantly towards UK’s carbon emission reduction targets with over 236,000 tons of CO2 saved each year. Andritz Hydro will manufacture the electromechanical equipment for the plant, for which completion is expected in the beginning of 2019 at the earliest. Slightly surprising is


hydropower’s current capacity. It makes up approximately 80 percent of renewable energy and covers 20 percent of the energy generated worldwide. What makes it so attractive is that it is the most researched and advanced renewable energy. Besides this, hydropower plants are extremely efficient and provide power whenever necessary – a stability


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wind power and photovoltaics, for example, can’t offer.


Unexhausted potential “Hydropower’s potential is far from exhausted. It is therefore high time this technology moves back into the focus of the energy policy,” says Heike Bergmann, member of the Management Board of Voith Hydro Germany. A Voith commissioned survey by the opinion research institute TNS Emnid surveyed 600 experts from Germany, Austria, Switzerland, Norway, and Sweden seems to confirm this assessment. Sixty-three percent of the experts believe there is a lot of unexhausted potential for hydropower in Norway, forty-six percent in Germany, forty-two percent in Austria and Switzerland, and thirty-seven percent in Sweden.


In Germany only 7,000 of around 50,000 dams or weirs are equipped with hydropower plants. Experts believe that only one-third of the possible investments account for modernisation, reactivation and new construction. Therefore, there is still room for plant engineers, valve manufacturers, and suppliers to go with the flow.


Latest innovations within the valve industry can be seen at Valve World Expo, taking place at Messe Düsseldorf from November, 29 to December, 1, 2016.


Press Contact Valve World Expo 2016 Petra Hartmann-Bresgen, M.A. Ulrike Osahon Tel.: +49 (0)211 4560-541 Fax: +49 (0)211 4560 87 541 E-Mail: HartmannP@messe- duesseldorf.de


IMT June 2016 19


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