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    News 25.01.2016

    Testing rotor blades cost-effectively

    The longer the rotor blades used on wind turbines, the greater the forces acting on them. The requirements for the components rise – and with them the demands made on the testing methods. On the one hand it is important to construct the blades as durably as possible. On the other hand, however, they also need to be manufactured so that they are as cost-effective and as light as possible. If a compromise is found, this still needs to be checked in a verifiable way: on the computer and in practice.  more...
     

    SpeedColl: Allowing collectors to age more quickly

    Whether in maritime, arid or alpine regions, solar collectors must perform flawlessly for years. But to what extent do high UV radiation, salty and humid air take their toll on the collectors? In order to find out, researchers at Fraunhofer ISE and Stuttgart University exposed solar collectors to the wind and weather at six locations. The result: The collectors and the components are more durable than previously thought. However, that makes it even more difficult to make comparisons.  more...
     

    Researching the natural seismicity

    The Upper Rhine Graben (Rhine Rift Valley) has geothermally usable hot water resources at an attainable depth. This geological feature is caused by the fact that the deep rock strata has remained in motion to this day. This repeatedly causes slight natural earthquakes in the region. In rare cases, however, human activities, such as the construction and operation of geothermal plants, can also trigger shocks. This effect is called induced seismicity. Prior to constructing a geothermal plant in Groß-Gerau, researchers have therefore been measuring the natural seismicity in the region using a dense monitoring network.  more...
     

    Heating buildings via their exterior walls

    Surface heating systems facilitate the integration of renewable energy sources and reduce energy costs. However, since the retrofitting of underfloor heating is very expensive, thermally activated walls provide an option in existing buildings. For the first time scientists at Saarland University are testing the use of capillary tube mats in exterior wall heating.  more...
     
    Projektinfo 14/2015

    Efficiently using district heat

    In future, it is intended that heating and domestic hot water systems in district heating networks should be increasingly capable of functioning with environmental heat at lower temperatures. However, at the moment the cooling potential is not yet being satisfactorily utilised. This is generally resulting in return temperatures and volume flow rates that are too high. This provides the starting point for the LowEx Systems project.  more...
     
    News 25.11.2015

    Reliably measuring large transmission components

    Around 20 to 25 per cent of wind turbine failures are caused by damage to gears and bearings. To make the turbines more durable and safer, large gear measurement standards are used for more reliable measurements. They are intended to make wind turbines more secure and can reduce production and operating costs. The extension to a measurement laboratory in Bremen has now been inaugurated.  more...
     

    “Rethinking collectors from a construction industry perspective”

    The trend towards zero-energy and energy-plus buildings has also increased the importance of using roofs and facades for the generation of renewable energy. The TABSOLAR research project has resulted in the development of new thermo-active building systems that are suitable for industrial prefabrication and can be used in a wide range of applications.  more...
     

    “We have to consider renewables as an association”

    New or existing buildings: covering heat demand with renewable energy has become a trend. Generally speaking, solar thermal systems are the ideal choice for hot water supply and heating support. But things have not been easy on the industry. In the BINE interview, Bernhard Weyres-Borchert, president of the Deutschen Gesellschaft für Sonnenenergie (DGS), speaks about chances and constraints of this sophisticated technology.  more...
     

    Germany’s largest nacelle test rig inaugurated

    Germany’s largest test rig for wind turbine nacelles is now in Bremerhaven. Here, drive trains with up to eight megawatts can be tested. A load transmission system mechanically simulates the wind loads occurring in the field. The Fraunhofer Institute for Wind Energy and Energy System Technology IWES recently commissioned the nacelle test rig.  more...
     
    Projektinfo 13/2015

    Electric impulses fragment hard rock

    Until now, roller bits have been used for drilling in deep-lying rock. These only advance slowly through crystalline formations and wear out quickly. That makes drilling measures more expensive and is particularly an economic problem for deep geothermal projects. Researchers in Dresden (Germany) are therefore developing an alternative drilling method for hard rock where a high-voltage impulse fragments the rock. Up to 30 % lower drilling costs are possible.  more...
     

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Events

25.02.2016 - 26.02.2016
Offenburg

GeoTHERM 2016
25.02.2016 - 28.02.2016
Dresden

Haus 2016 - Baumesse
26.02.2016 - 28.02.2016
Freiburg

Gebäude.Energie.Technik (GETEC)

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