Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Modelling local hygrothermal interaction between airflow and porous materials for building applications
Moisture related damage in buildings is a phenomenon which is familiar to most people. Most of the time it is spontaneously associated with damage due to liquid moisture transport such as plumbing leaks, rising moisture in walls, . . . Yet some materials and objects are so sensitive to moisture that they can already be damaged by water vapour transport through the air. This is especially true for culturally or historically valuable artefacts: even a small amount of damage (like small cracks, . . . ) is unacceptable for these objects. The reason for their high sensitivity for moisture related damage can be found in the used materials: these objects are typically composed of wood or other organic materials which strongly expand in function of the moisture content (and thus indirectly in function of the relative humidity). This means that subsequent fluctuations of the relative humidity in the air can result in an expansion and deformation of the object and the hereby induced tensions can lead to fractures or other damage phenomena (e.g. cracking of paint). To preserve these objects as good as possible it is hence extremely important to keep the relative humidity in the surrounding air as constant as possible. Art objects are typically stored and exhibited in historical (e.g. churches) or monumental buildings (e.g. museums). While it is now standard procedure to place a HVAC installation in large buildings, this was of course not the case for historical buildings. Yet due to the increased demand on thermal comfort, these historical buildings are, when retrofitted, more and more equipped with at least a permanent heating system. The intermittent use of a heating system however results in considerable temperature fluctuations and thus also in important relative humidity fluctuations. Due to the large volume of these buildings the temperature and relative humidity fluctuations will strongly vary in space: during heating the temperature above an air inlet will for example rise much stronger than the temperature in the ...
Modelling local hygrothermal interaction between airflow and porous materials for building applications
Moisture related damage in buildings is a phenomenon which is familiar to most people. Most of the time it is spontaneously associated with damage due to liquid moisture transport such as plumbing leaks, rising moisture in walls, . . . Yet some materials and objects are so sensitive to moisture that they can already be damaged by water vapour transport through the air. This is especially true for culturally or historically valuable artefacts: even a small amount of damage (like small cracks, . . . ) is unacceptable for these objects. The reason for their high sensitivity for moisture related damage can be found in the used materials: these objects are typically composed of wood or other organic materials which strongly expand in function of the moisture content (and thus indirectly in function of the relative humidity). This means that subsequent fluctuations of the relative humidity in the air can result in an expansion and deformation of the object and the hereby induced tensions can lead to fractures or other damage phenomena (e.g. cracking of paint). To preserve these objects as good as possible it is hence extremely important to keep the relative humidity in the surrounding air as constant as possible. Art objects are typically stored and exhibited in historical (e.g. churches) or monumental buildings (e.g. museums). While it is now standard procedure to place a HVAC installation in large buildings, this was of course not the case for historical buildings. Yet due to the increased demand on thermal comfort, these historical buildings are, when retrofitted, more and more equipped with at least a permanent heating system. The intermittent use of a heating system however results in considerable temperature fluctuations and thus also in important relative humidity fluctuations. Due to the large volume of these buildings the temperature and relative humidity fluctuations will strongly vary in space: during heating the temperature above an air inlet will for example rise much stronger than the temperature in the ...
Modelling local hygrothermal interaction between airflow and porous materials for building applications
Steeman, Hendrik-Jan (Autor:in) / De Paepe, Michel / Janssens, Arnold
01.01.2009
Hochschulschrift
Elektronische Ressource
Englisch
DDC:
690
Numerical Investigation of Hygrothermal Behavior on Porous Building Materials
| BASE | 2016
Inter-laboratory variability results of porous building materials hygrothermal properties
| Online Contents | 2017
Inter-laboratory variability results of porous building materials hygrothermal properties
| British Library Online Contents | 2017
Inter-laboratory variability results of porous building materials hygrothermal properties
| British Library Online Contents | 2017