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    Solar thermal power plants

    The annual solar irradiation on the earth provides more than 8,000 times the world’s energy requirements. Mathematically speaking, about 1 % of the surface area of the Sahara Desert is sufficient in order to meet the world’s electricity requirements with solar thermal power plants. A solar thermal power plant was already constructed close to Cairo at the beginning of the 20th century. Using parabolic mirrors, the power plant captured and concentrated solar energy and used it to heat oil for boiling water. This in turn was used to drive steam turbines and produce electricity.  more...
     

    Electrically driven heat pumps

    Electric heat pumps have become firmly established in the German heating market. In recent years they have gained an eight to ten per cent share of the market. Approximately every fourth new building is heated with a heat pump. Whereas until a few years ago ground source heat pumps were still sold the most, the sales figures have shifted in recent years in favour of air source heat pumps. Carefully planned, heat pump systems compare very economically with other heating systems.  more...
     

    RAVE - Research on the offshore test field

    High, far, deep and rough - this is how the RAVE research initiative itself describes the typical challenges faced by offshore wind energy. During the next few years, a dozen large-scale wind farms are being installed far off the coast of Germany in the North and Baltic seas. These are already earmarked to make up more than one third of the installed wind energy output by 2020. The sea-based wind farms will therefore make a considerable contribution to generating 35% of electricity from renewable energies by 2020, as envisaged by Germany´s energy policy.  more...
     

    Innovations in Photovoltaics

    New developments make it possible: solar power can be produced increasingly cheaply. The solar power industry is close to achieving grid parity, which means that it will no longer cost more to generate solar power than the current consumer price. Researchers are presenting solar cells with ever-higher efficiencies and new records are constantly being set, only to be broken again. The series of successes is one of the clearest indications for the rapid progress being made in photovoltaics.  more...
     

    Insulation through vacuums

    What works for thermos flasks can also be used for thermally insulating buildings: insulation by means of a vacuum. For this purpose, panels made of compressed silica powder, which is an extremely porous material, are enclosed in a largely gas- and water vapour-tight envelope made of special high-barrier films or stainless steel and evacuated. The thermal insulation provided by these vacuum insulation panels (VIPs) is five to ten times that achieved by conventional insulation systems. This means that vacuum insulation requires a correspondingly lower thickness of insulation material to achieve the same insulating effect, which is highly beneficial when there are space constraints or high thermal insulation requirements.  more...
     

    Commissioning and optimisation of buildings

    There are now many highly efficient new buildings around – at least on paper, anyway.  Only when a building actually goes into operation does its owner really know whether it makes the most of its potential efficiency or not. However, not enough attention is paid to the long phase of operation. A clean break generally takes place when the keys to the building are handed over: The architects and energy planners have specified target values, but actually achieving these values is either left to others or else disappears completely off the radar.  more...
     

    Latent heat storage in buildings

    Can heat - or cold - be stored directly in walls and ceilings? Can heat be stored at precisely the temperature level at which it is to be used later on? And can the heat storage effect be used in a controlled manner as regards time and intensity? The answer is a clear "yes" - using materials that store heat "latently", using a process that occurs at a defined temperature level and delivers high "concentrations".  more...
     

    Large-scale solar thermal systems for buildings

    To date, the topic of solar collector systems has primarily involved small-scale standard systems for single-family and double-family houses. Here, we would like to focus on the numerous large buildings which could also be provided with solar heat. While many blocks of flats, housing estates, hotels, halls of residence, hospitals and commercial buildings have large unused roof surfaces, the facades and balcony balustrades, or the roofs of adjacent buildings such as garages, are also surfaces which could be used for the heat supply.  more...
     

    Thermo-active building systems

    Can buildings be cooled with environmental energy? Yes - with the aid of thermo-active building systems. Conventional chillers become unnecessary if buildings are planned and built in an architecturally and physically energy-optimised manner. And if using thermoactive building systems, the building's own storage capacity can be utilised for temperature compensation, and activated via natural heat sinks such as the ground, ground water, or the cool night air. Since the 1990s, more and more buildings are being cooled with these systems - and heated as well.  more...
     

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Events

25.04.2014 - 26.04.2014
Aachen

18. Internationale Passivhaustagung
05.05.2014 - 09.05.2014
Indonesien, Jakarta

Netzgekoppelte Photovoltaik in Indonesien
07.05.2014 - 09.05.2014
Bad Staffelstein

24. Symposium Thermische Solarenergie

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