Energieeinsparpotential eines Passivhauses unter Berücksichtigung von Wetterprognosen

Innovative Regelungen in Gebäuden können beachtliche Energieeinsparungen zur Folge haben. Besonderes Augenmerk ist hierbei auf Gebäude gelegt, die in einem gesteigerten Maße von ihrer Umwelt thermisch entkoppelt sind: dazu wird ein nach Passivhausstandard gebautes, real existierendes Bürogebäude modelliert, das Modell mit Monitoring‐Daten validiert und simuliert. Anhand der Simulationen mit der Simulationsumgebung TRNSYS und der Hinzunahme von gemessenen Wetterdaten werden mögliche Energieeinsparpotentiale erkannt und ausgewertet. In dieser Betrachtung, die den Zeitraum eines kompletten Jahres (Zeitraum 2009/2010) beinhaltet, liegt der Fokus auf Energieeinsparungen, die durch intelligentes Heizen und Kühlen des Gebäudes erzielt werden können. Potential for saving energy in a Passivhaus building, taking into account weather forecasts. Innovative controls in buildings can lead to remarkable energy savings. The main focus of this paper is on buildings that are highly thermally insulated from their environment: the model is based on an existing building that was built to Passivhaus standard, and then validated with monitoring data and simulated. By adding actual, measured weather data in the simulations (which were done in the TRNSYS simulation environment) potential energy savings are identified and evaluated. In this analysis, which covers a full year (2009/2010), we concentrate on energy savings in the building’s heating and cooling systems.     

Der sommerliche Wärmeschutz eines sanierten Wohngebäudes aus den 1950er Jahren unter Berücksichtigung des Nutzerverhaltens

Sommer heat insulation of a reinstated residential building of the 1950s considering the user‵s behaviour. A verification of the summer heat insulation according to the new issue of DIN 4108‐2 from July 2003 will be required in the future due to the expected amendment of the Energy Savings Regulation that will take effect probably in the autumn of 2004. The effects on the construction requirements and on the indoor climate can be shown using an example of a multiple family dwelling built in the 1950's. Problems with additional thermal heat requirements will be considered as well as the daylight conditions in the living space. The ventilation conditions and the resulting periods of overheating for various occupancies will be discussed using a thermal building simulation with ESP‐r.     

Meßtechnische Erfassung von Lage und Verformung eines Stahltragwerks unter Temperatureinfluß

Recording of position and deformation of a steel structure with geodetic measurements under varying climatic conditions. Repeated geodetic 3d‐measurements on a part of the steel construction of the Wuppertal Suspension Railway were carried out to analyse the influence of the momentarily prevailing steel temperature on the geometry of the construction. Based on a precise geodetic network the coordinates of points marked out on the construction were determined simultaneously recording the steel temperature. The objectives of the measurement were on the one hand to derive the measuring uncertainties, that can be achieved in practice for control and setting‐out measurements on complex steel constructions applying a standard method, and on the other hand to check if the behaviour of the construction under temperature load is according to the material's law.     

Der Einfluss von Imperfektionen in dünnwandigen geschweißten Rechteckquerschnitten unter Druckbeanspruchung

On imperfections in thin‐walled welded rectangular hollow section compressive members. This contribution presents the results of a research project analysing some aspects of stability failure of thin‐walled RHS compression members that are likely to exhibit combined global and local buckling. In particular the influence of various imperfections, namely residual stresses due to weld‐ing and local as well as global geometrical defects, on the load‐carrying capacity is subject to detailed experimental and numerical investigations. The insight into the structural behaviour leads to recommendations for standardized imperfections that should be used in the context of the numerical modelling of class‐4 square and rectangular hollow section members subjected to compression.