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    News 18.07.2016

    First liquid salt storage facility with one tank

    High-temperature heat storage tanks ensure that power plants work more flexibly and industrial process heat can be temporarily stored. Researchers at the German Aerospace Center (DLR) have therefore developed a heat storage tank for temperatures up to 560 degrees Celsius, which stores the heat in molten salt. Construction work on the testing facility began at the start of July 2016.  more...
     
    News 22.06.2016

    Collectors putting the heat on the automotive industry

    Solar thermal energy has great potential up to 250 degrees Celsius. Apart from space heating and domestic hot water, only a fraction of it is used for other purposes. Therefore, researchers aim to make solar process heat usable in the automotive industry. A joint German-Austrian project has now been launched.  more...
     

    Storing heat until winter

    To be able to use summer heat for heating during the winter, hot water storage systems have to be very large. Small storage systems cool down too quickly. With this in mind, seasonal storage tanks have been developed almost exclusively for housing estates or very large consumers. Now researchers have created a new long-term storage system which is also suitable for single-family homes.  more...
     

    The building serves as a heat storage tank

    Buildings with high solar shares of fraction require large water tanks to store heat. Researchers have developed a space-saving alternative: excess heat is stored in the ceilings of the building via building element activation. Scientists are currently testing the concept in an experimental building near Hanover. They now have the results of the first year of operation.  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...
     

    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...
     

    “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...
     

    Greater efficiency: Generating steam in receivers

    On the Plataforma Solar de Almería in southern Spain, scientists from the German Aerospace Center (DLR) have developed a new way of generating solar steam. In the installation, the steam used for producing electricity is generated directly in the receiver tubes in the parabolic troughs. This therefore eliminates intermediate steps using heat transfer media and also enables higher operating temperatures of up to 550 degrees Celsius. This should therefore enable parabolic trough power plants to produce electricity more efficiently and cheaply.  more...
     

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