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    Projektinfo 18/2015

    Designing heat distribution with slurries

    In heating and cooling systems, water is mostly used for transporting heat. For special applications, dispersions of paraffin and water could carry out this task more efficiently. These so-called slurries achieve high heat capacities within a narrow temperature range. Scientists at RWTH Aachen are simulating the complex behaviour of the fluids in hydraulic networks. With new simulation models they are investigating possible uses – ranging from underfloor heating in family homes to district heating networks.  more...
     
    Projektinfo 16/2015

    Future heating supply designed

    Over the past thirty years, the population of Duisburg has fallen by more than a fifth, and the heating requirement has also reduced. A team of experts has investigated how the municipal utility company can adapt the heating supply in accordance with these developments by 2050. A main recommendation: The interconnection of two district heating networks would increase the primary energy efficiency and cut costs, mainly because industrial waste heat could be better utilised.
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    Projektinfo 15/2015

    Electricity grid with strong genes

    The electricity grid is both dynamic and sluggish at the same time. On the one hand, it distributes electricity with rapidly fluctuating loads. On the other hand it takes a long time before constructional changes can be planned and carried out, which is due to both technical and social reasons. This makes it important to assess future scenarios with simulations. Scientists at RWTH Aachen are achieving this with their GENESYS software program.  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...
     
    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...
     

    Energy centre supplies Giessen University Hospital

    Giessen’s municipal utility company and University Hospital have jointly constructed the first energy centre to be integrated into a local heating and cooling network. The newly developed combined cooling, heating and power system ensures an uninterrupted supply to the hospital. It saves 21.7 % of the primary energy and 33.6 % of the CO2 emissions.  more...
     
    Projektinfo 11/2015

    Hybrid building machinery

    Hybrid drives make construction machinery not only more economical and quieter – the power from the two engines also provides power reserves for special loads. The advantages of combining a combustion engine with an electric drive have been demonstrated by the DEUTZ engine manufacturing company from Cologne using an excavator. In order to realise the full savings potential, the engineers have also closely examined the auxiliary units as part of the Green Industrial Diesel (GRID) project.  more...
     
    Projektinfo 10/2015

    University campus to become climate neutral

    An interdisciplinary research team has developed an energy master plan for the campus belonging to the Technische Universität Braunschweig. Various scenarios for developing the campus as far as 2020 have been created with the aim of reducing the primary energy consumption by 40% and, in the long term, facilitating the conversion to renewable energy. Planning principles have been developed for the renovation and urban development of the site that can also be transferred to other urban districts.  more...
     
    Projektinfo 09/2015

    Long-term monitoring of school building

    The new building for the Gebhard Müller School in Biberach has fulfilled expectations – for more than ten years the building has had a consistently low energy consumption. The building’s commissioning phase marked the beginning of intensive scientific monitoring, which lasted for three years. The results led to adjustments to the building services operation. This enabled, for example, the primary energy consumption for heating, cooling and ventilation to be reduced by about 30%. Long-term monitoring is intended to ensure that this level can be maintained over the long term without scientific support.  more...
     
    Projektinfo 08/2015

    Processing solar cells with lasers

    Laser technology enables solar cells to be produced with greater efficiency. It replaces or eliminates costly processing steps that were previously required. Researchers have developed a method for laser contacting the rear side of solar cells that can be integrated into existing production lines for screen printing solar cells. The new technique enables the cells to be produced at a lower cost, reduces the energy and materials deployed, and eliminates previously required environmentally harmful chemicals.  more...
     

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