Kombination von Thermografieaufnahmen mit numerischen Strömungssimulationen zur Bestimmung des Volumenstroms durch Leckagen
Combining thermal imaging with computational fluid dynamics to determine the volume flow through leakages
Energy-saving building requires in addition to a good thermal building insulation an airtight building envelope. Leakages in exterior building elements therefore have to be avoided or repaired, also in consideration of the fact that they can lead to structural damage by moisture. Thermal imaging can be used to detect leakages. However, to date only the positioning of the leakage is possible, while the energy loss through the leakage cannot be specified yet. The aim of the analysis at hand was to assess the potential of thermal imaging regarding a simple, fast and precise method to determine the quantity of the energy loss due to the air flow through a leakage. For this purpose an experimental setup was developed and experiments were conducted. Those were compared to results from computational fluid dynamics. In doing so, a very good agreement between experiment and simulation was found.