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    Keeping a cool head in the summer heat

    Many present-day office and administrative buildings are not air conditioned. When the temperatures rise during the summer, this can have a negative effect on the thermal comfort of the users. Scientists analysed what effect improved protection against the sun and the use of ceiling fans can have on user behaviour and satisfaction. So-called comfort models are also important influencing factors.  more...
     
    Projektinfo 03/2016

    Developing robust pumps for geothermal energy

    Systems for using deep geothermal energy need special pump systems. These are up to 36 meters long and weigh eight tonnes. They must be able to withstand high temperatures and high flow rates, as well as mineralrich water. Pumps for geothermal energy have been tested during several field tests and on the largest high-temperature test loop in the world, and have been significantly improved. The prototypes already fulfil the development goals to a large degree. By 2017, key components will have been further developed ready for serial production.  more...
     

    Modelling power supply for 2050

    By 2050, the goal is for renewable energy sources to generate at least 80 per cent of power. In order to then still guarantee reliable supply at affordable prices, the entire energy system must be adapted and converted in a step-by-step process. The increasing share of fluctuating energy sources requires a flexible system that can react quickly. A research project demonstrates the degree of grid expansion, storage and new regulation opportunities that are technically required for this purpose, and which make economic sense.  more...
     
    Projektinfo 01/2016

    Energy-plus concept tested on housing estate

    A housing estate was built on an industrial waste ground with over 180 residential units built to energy-plus standards. But how much does it cost to operate this low-energy building type in an energy efficient way? And how much influence do the residents have over energy consumption? To find out, researchers from the Munich University of Applied Sciences and the Dresden Technical University monitored the area by taking measurements, and optimised the technology in operation. A software programme also visualised the energy consumption for the residents.  more...
     
    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 17/2015

    Excellent climate for ancient manuscripts

    The new Central Library combines the book collections that were previously spread across several locations. Luitpoldhaus, which is located in a listed ensemble of buildings in Nuremberg’s old town, has been rebuilt and expanded. The project aim of undercutting the requirements of EnEV 2007 for new-build schemes by at least 30% has been exceeded. However, the high demands placed on the indoor environment for archiving and exhibiting medieval manuscripts made the task extremely tricky.  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...
     

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