A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Potenziale hygrothermisch aktivierter Bauteile (PhyTAB)
Within the research project "Potentials of hygrothermally activated building components" (PhyTAB)- the potential of hygroscopically active surfaces (HAO) in particular- is being investigated with the aim of applying this knowledge to further developments of a thermally activated solid timber components (TAM). A literature review sets the foundation for laboratory measurements to quantify the so-called hygrothermal effect on surfaces. The heating of wood and clay surfaces due to the release of sorption enthalpy after water vapor adsorption can clearly demonstrated in laboratory experiments. In this research project, these investigations will be transferred to observations under real conditions in a test chamber subjected to the influence of the local weather conditions. For this purpose, two measuring cubes are designed, planned and put into practice. An appropriate measurement, supply and electrical concept forms the basis for the experiments. This implementation serves the function to detect the hygroscopic behaviour. The setup of these cubes enables a theoretical preselection of materials by simulations and provides recommendations for the control strategies for the hygrothermally-optimized use of the TAM surface. Drawing on the conclusion of the hygroscopically active surfaces, the results suggest that the hygrothermal processes can be reproduced with the selected test setup. Here, the different component structures exhibit different behaviours. The heating of the inside of a cross-laminated timber construction after an isothermal moisture jump can be successfully measured using the methods adapted from the laboratory tests. The comparison of an untreated and a varnished cross-laminated timber surface proves the discrepancy in the transient hygric as well as hygrothermal behaviour. With regard to the fluctuations of the interior temperature in the centre of the test cube, minor thermal buffering effects can be observed allocated to the sorption heat in certain measurement periods. A further long-term ...
Potenziale hygrothermisch aktivierter Bauteile (PhyTAB)
Within the research project "Potentials of hygrothermally activated building components" (PhyTAB)- the potential of hygroscopically active surfaces (HAO) in particular- is being investigated with the aim of applying this knowledge to further developments of a thermally activated solid timber components (TAM). A literature review sets the foundation for laboratory measurements to quantify the so-called hygrothermal effect on surfaces. The heating of wood and clay surfaces due to the release of sorption enthalpy after water vapor adsorption can clearly demonstrated in laboratory experiments. In this research project, these investigations will be transferred to observations under real conditions in a test chamber subjected to the influence of the local weather conditions. For this purpose, two measuring cubes are designed, planned and put into practice. An appropriate measurement, supply and electrical concept forms the basis for the experiments. This implementation serves the function to detect the hygroscopic behaviour. The setup of these cubes enables a theoretical preselection of materials by simulations and provides recommendations for the control strategies for the hygrothermally-optimized use of the TAM surface. Drawing on the conclusion of the hygroscopically active surfaces, the results suggest that the hygrothermal processes can be reproduced with the selected test setup. Here, the different component structures exhibit different behaviours. The heating of the inside of a cross-laminated timber construction after an isothermal moisture jump can be successfully measured using the methods adapted from the laboratory tests. The comparison of an untreated and a varnished cross-laminated timber surface proves the discrepancy in the transient hygric as well as hygrothermal behaviour. With regard to the fluctuations of the interior temperature in the centre of the test cube, minor thermal buffering effects can be observed allocated to the sorption heat in certain measurement periods. A further long-term ...
Potenziale hygrothermisch aktivierter Bauteile (PhyTAB)
Flexeder, Nina (author) / Schumacher, Nils (author) / Hepf, Christian (author) / Nouman, Ahmad (author) / Briels, David (author) / Varga, Zsofia (author) / Kamml, Michael (author) / Paulik, Johannes (author) / Übelhör, Valentin (author) / Winter, Stefan (author)
2022-01-01
Paper
Electronic Resource
German
| Fraunhofer Publica | 2009