Outdoor testing under realistic transient boundary conditions ultimately delivers the most convincing results. Further advantages are gained when outdoor tests are combined with simulations, which can then be validated while keeping outdoor testing costs down to reasonable levels at the same time. Fraunhofer IBP’s site in Holzkirchen is home to the world’s largest full-scale outdoor testing ground for building structures and components, building materials and building system components. The local climate is characterized by extremes of weather that make it perfectly suited to this task, including strong sunshine in summer, cold winters and driving rain.
One large and several small meteorological stations are situated on the outdoor testing ground and in the immediate vicinity. A number of these stations have continuously recorded all key climate parameters since the 1980s. They provide the data needed for a precise analysis of weather conditions and their local dependencies (microclimate analyses). The collected data also serve to establish the boundary conditions for hygrothermal and energy simulations and to facilitate more precise interpretation of outdoor test results.