Validation of hygrothermal material modelling under consideration of the hysteresis of moisture storage (E-Book)

The achievable accuracy of hygrothermal building component simulation is significantly dependent on the applied material functions. These functions are determined by the material modelling marking the connection between the basic storage and transport parameters which are obtained from basic measurements, and the storage and transport coefficients which are defined within the balance and flow equations. It is the aim of the present study to develop a flexible and widely applicable material model which is not restricted to the current level of the transport theory. Furthermore, limits and options of this model are to be validated by means of four building materials on the basis of special transient moisture profile measurements.
By the presented study, the material modelling has been decisively further developed, the set of basic measurement methods has been extended by a substantial experiment and the instantaneous profile measurement technique has been made applicable to Building Physics. Moreover, the influences of the process history and the process dynamics on the moisture transport and the resulting moisture profiles could be shown and proven. By that, not only a material model is now available which perfectly applies to the requirements of flexibility, applicability and extendibility. The obtained data provides also a powerful basis for further research and development.

• Preface and Acknowledgement
• Abstract
• Kurzfassung
• Table of Contents
• Introduction and Overview
• Theory of material modelling
• • Heat and mass transport in porous media
  • Material Modelling in Building Physics
  • Conclusions on material modelling
• Experimental Methods
• • Basic hygrothermal material properties
  • Instantaneous profile measurements
  • Conclusions on Experimental Methods
• Investigated Material
• Development and Utilisation
• • Developments in Material Modelling
  • Methodological Developments for the Drying Experiment
  • Instantaneous profile measurements
  • Concluding Developments and Utilisation
• Implementation and Application
• • Implementation of the material model
  • Application of the material model
  • Implementation of TDR data evaluation
  • Application of the TDR models
  • Conclusions
• Simulation and Validation
• • Hygroscopic moisture transport
  • Overhygroscopic moisture transport
  • Discussion and Conclusions
• Summary, Conclusions and Future Prospects
• • Content summary
  • Results and conclusions
  • Future prospects
• List of Symbols and Abbreviations
• References