Diploma thesis Niklas Schacht (Architecture)
Development of calculation boundary conditions for the
hygrothermal simulation of earth-contacting building components
Development of calculation boundary conditions for the hygrothermal simulation of earth-contacting building components
For several years now, the world has been undergoing a highly accelerated process with the overarching goal of combating climate change. In addition to the switch to renewable energies, energy saving in the various sectors also plays a major role. As a result, many efforts are being made, especially politically, to meet the targets. The German government's targets are set out in the Federal Climate Protection Act. The agreements of the UN Framework Convention on Climate Change are to serve as a model and benchmark for national implementation. The Kyoto Protocol of 1997 and the Paris Agreement of 2015 are regarded as milestones. In the latter, the states agreed for the first time under international law to limit global warming to well below 2°C compared to pre-industrial levels.
In the building sector, national regulations in Germany have led to a significant improvement in thermal insulation and building tightness. What saves energy on the one hand, however, carries an increased risk of moisture damage on the other. This is due to higher indoor humidity levels. This is accompanied by an increased risk of condensation. In addition, other external influences such as rainwater, condensation from outside or building moisture also pose a greater problem. This is because, unlike in the past, the new construction methods provide less heat for moisture evaporation in the building components. As constructions are designed to be durable, a targeted manner of moisture protection planning is now more important than ever. Due to this and the increased demands on damage prevention, it is necessary to take a close look at the hygrothermal conditions and formulate new solutions. Because if the planning and execution of moisture protection is carried out carefully and the right choice of materials is made, most damage can be successfully avoided. Traditionally, the Glaser method is used to assess moisture protection. Named after the German refrigeration engineer Helmut Glaser, it only takes into account winter condensation caused by diffusion from the interior with stationary boundary conditions. Nowadays, however, we know that numerous other important factors must also be considered. With hygrothermal simulation, these parameters can be included in the planning, allowing a realistic calculation to be created.
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Diploma Thesis Niklas Schacht (Architecture)
Supervision
The work was supervised by Dipl.-Ing. Heiko Fechner.
© Heiko Fechner
Research assistant
NameDipl.-Ing. Heiko Fechner
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