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The hygrothermal behaviour of rooms: combining thermal building simulation and hygrothermal envelope calculation

Holm, A., Kuenzel, H. M. and Sedlbauer, K.
2003
Eighth International IBPSA Conference, Eindhoven, Netherlands, August 11-14

Holm, A., Kuenzel, H. M. and Sedlbauer, K., (2003), "The hygrothermal behaviour of rooms: combining thermal building simulation and hygrothermal envelope calculation", Eighth International IBPSA Conference, Eindhoven, Netherlands, August 11-14.
Abstract:
The hygrothermal behavior of a building component exposed to weather is an important aspect of the overall performance of a building. Today the hygric transport phenomena through a building envelope are well understood and a realistic assessment of all relevant effects can be carried out by one of the numerous models and computer programs, that have been develop ed in different countries over the last years. The calculation of the hygrothermal performance of a part of the envelope is state-ofthe- art, but until now, the total behaviour of the actual whole building is not accounted for. Its importance is increasing as modern dwellings become more airtight and show elevated indoor humidity levels. This requires the detailed consideration of all hygrothermal interactions between the indoor air and the envelope. In this paper a new holistic model, that takes into account the main hygrothermal effects, like moisture sources and sinks inside a room, moisture input from the envelope due to capillary action, diffusion and vapor ab- and desorption as a response to the exterior and interior climate conditions, heat source and sinks inside the room, heat input from the envelope, the solar energy input through walls and windows and hygrothermal sources and sinks due to natural or mechanical ventilation will be presented.

This publication in whole or part may be found online at: This link was broken when checked on Dec. 2006here.
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Author Information and Other Publications Notes
Holm, A.
Gunnar Holm Department of Biotechnology, Technical University of Denmark, Building 221, DK-2800 Lyngby, Denmark.
  1. An educational hygrothermal model: WUFI-ORNL/IBP
  2. Combined effect of temperature and humidity of the detoriation process of insulation materials in ETICS
  3. Determination of moisture and salt content distributions by combining NMR and gamma ray measurements
  4. Drying of an AAC flat roof in different climates Computational sensitivity analysis versus material property measurements
  5. Moisture buffering effects of interior linings made from wood or wood based products
  6. Moisture-buffering effect - experimental investigations and validation
  7. Non-isothermal moisture transfer in porous building materials
  8. Position paper on material characterization and HAM model benchmarking
  9. Practical application of an uncertainty approach for hygrothermal building simulations--drying of an AAC flat roof
  10. Previous Experimental Studies and Field Measurements on Moisture Buffering by Indoor Surface Materials
  11. Simulation of indoor temperature and humidity conditions including hygrothermal interactions with the building envelope
  12. Stochastic building envelope modeling -- the influence of material properties
  13. Two-dimensional transient heat and moisture simulations of rising damp with WUFI 2D
  14. Uncertainty approaches for hygrothermal building simulations - drying of an AAC flat roof in different climates
  15. Uncertainty of hygrothermal calculations  
Kuenzel, H. M.
Director of Hygrothermics, Fraunhofer Institute of Bauphysics e-mail: kuenzel@hoki.ibp.fhg.de 3 Senior Researcher, Hygrothermal Modeling Manager, Fraunhofer- e-mail: holm@hoki.ibp.fhg.de
  1. An educational hygrothermal model: WUFI-ORNL/IBP
  2. Position paper on material characterization and HAM model benchmarking
  3. Practical application of an uncertainty approach for hygrothermal building simulations--drying of an AAC flat roof
  4. Uncertainty approaches for hygrothermal building simulations - drying of an AAC flat roof in different climates  
Sedlbauer, K.
Klaus Sedlbauer Fraunhofer-Institute for Building Physics, Holzkirchen
  1. A new model for mould prediction and its application on a test roof
  2. A new model for mould prediction and its application on dwellings with mould on the outer facades
  3. Ecological insulation materials - does sorption moisture affect their insulation performance?
  4. Information and Technology Transfer from IBP: Mold Growth on ETICS (EIFS) as a Result of "Bad Workmanship"?
  5. Moisture buffering effects of interior linings made from wood or wood based products
  6. Mold growth prediction by computational simulation
  7. Prediction of mould fungus formation on the surface of and inside building components
  8. Prediction of mould growth by hygrothermal calculation  


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