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The high influence of ventilation on the energy efficiency in buildings containing large-volume spaces - example-building

The german parliament building "Reichstag" in Berlin
: Staudt, A.; Erhorn, H.; Erhorn-Kluttig, H.

Air Infiltration and Ventilation Centre -AIVC-, Coventry; Energie- und Umweltzentrum am Deister -EUZ-, Springe-Eldagsen; Fraunhofer-Institut für Bauphysik -IBP-, Stuttgart:
4th International Symposium on Building and Ductwork Air Tightness, BUILDAIR & 30th AIVC Conference "Trends in High Performance Buildings and the Role of Ventilation" 2009. Reader : 1. - 2. Oktober 2009 in Berlin, with accompanying trade fair; complete contributions
Springe-Eldagsen, 2009
International Symposium on Building and Ductwork Air Tightness (BUILDAIR) <4, 2009, Berlin>
Conference "Trends in High Performance Buildings and the Role of Ventilation" <30, 2009, Berlin>
Internationales Symposium "Luftdichtheit von Gebäuden und Lüftungssystemen" <4, 2009, Berlin>
Tagung "Entwicklungen bei Hocheffizienten Gebäuden und die Rolle der Lüftung" <30, 2009, Berlin>
Conference Paper
Fraunhofer IBP ()

The influence of ventilation on the energy performance of a building is generally considered to be quite high. It rises clearly, when a building contains large-volume spaces. A famous example building for that is the Reichstag building in Berlin, housing the German parliament. The huge plenary hall in the building's centre, which occupies only 4% of the total net floor area but 20% of its net volume, is equipped with a powerful air-conditioning system. The remarkable effects of slightly different settings of this ventilation system on the building's energy performance are illustrated by example calculations based on the German standard "DIN V 18599: Energy efficiency of buildings". Extending the system's operating time significantly increase the zone's energy use by up to 205%, when running the system throughout the whole year, leading to a growth of the building's total delivered energy of 18%. A clear influence is also shown by the existence and quality of heat recovery, which is analyzed by stepwise improving the recovered heat coefficient from 0 to 45%, 60% and 75%. The latter reduces the zone's heating energy by half and that of the whole building by 6%. In conclusion, the analysis clearly demonstrates the high impact of ventilation in large-volume spaces. Consequently, especially for these areas, an energy efficient air-conditioning system should be installed and a reasonable ventilation strategy developed, as realized in the Reichstag building.