Sensitivity Analysis with Building Simulations to Support the Commissioning Process

Building performance simulations can support the commissioning process of buildings. This paper introduces an approach to implement saving measures using sensitivity analysis with a simulation model and data analysis of measured data from the building. The building that is analyzed is a large non-residential building that was equipped with a data acquisition system. Global sensitivity analysis methods including Monte Carlo (MC) techniques are used to determine the parameters and variables for which the buildings energy consumption is most sensitive to. This information is employed for the optimization of the building operation. Furthermore, the MC simulations are used to quantify the uncertainty of the simulation results given the uncertain simulation parameters or variables. The MC simulations of the building are used to calculate the energy savings for some operational improvements and the corresponding uncertainty. One saving measure was implemented in the real building and the result of the implementation is analyzed using the measured data

Application of Inverse Models for Long-Term-Energy-Monitoring in the German Enbau: Monitor Project

in order to pave the way for energy savings and utilizing solar energy in non residential buildings, the german federal ministry of economics and technology (bmwi) has established an energy research program called "energy optimized building" that supports the planning and evaluation of demonstration projects. enbau:monitor, as the related accompanying project, documents and analyzes these projects on a common platform. in the framework of enbau:monitor, two different monitoring phases were defined. a detailed monitoring takes place during the first two years of operation. after this period a long-term energy monitoring was established in order to evaluate the sustainability of the innovative designs and systems. fraunhofer ise defined enhanced guidelines for the long-term-energy-monitoring and developed a system for prescription of the placement of meters. furthermore the application of inverse models for automated control of the energy use connected to heating, cooling and electricity is envisaged. the paper presents the new concept as well as the most important findings of the enbau:monitor project

Energy-Optimised Building- Experience and Future Perspectives from a Demonstration Programme in Germany

In 1995, the German Federal Ministry of Economics and Technology launched an intensive research and demonstration programme on energy-optimised construction of new buildings as well as retrofitting the building stock. Beside research on materials and components, approximately 50 demonstration buildings covering various building typologies have been realized and monitored within the programme (www.enob.info). Accompanying research was conducted to systemise the results and lessons learned. The programme led to a set of prominent research results in the fields of e.g. daylighting, passive cooling, energy efficiency and renewable energy use in commercial buildings, user behaviour and user satisfaction. Many of the demonstration projects have reached energy savings of 50% and more compared to current practice in Germany, without exceeding conventional investment costs. A number of these projects have been awarded architectural prizes. This paper summarises key findings and explains the strategies for new projects on the route toward net zero-energy buildings. These strategies are based on a further decrease in energy demand and increased renewable energy utilization in conjunction with intensified use of building-integrated power generation interacting with the public grid