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Combined Heat, Air, and Moisture Transport in Loose-Filled Insulation - Experiment and Simulation

Riesner, K., Wang, J., Hagentoft, C. and Mainka, G.
2001
Proceedings for Performance of Exterior Envelopes of Whole Buildings VIII: Integration of Building Envelopes, December 2-7, Clearwater Beach, Florida

Riesner, K., Wang, J., Hagentoft, C. and Mainka, G., (2001), "Combined Heat, Air, and Moisture Transport in Loose-Filled Insulation - Experiment and Simulation", Proceedings for Performance of Exterior Envelopes of Whole Buildings VIII: Integration of Building Envelopes, December 2-7, Clearwater Beach, Florida.
Abstract:
The paper presents the experimental and simulation results of a study on simultaneous heat, air, and moisture transport in a loose-fill insulation. The study was aimed at investigating the thermal and moisture effects of natural air convection with no liquid transport present and to validate a numerical model. The vertical rectangular cavity of the structure was filled with preconditioned expanded polystyrene material. The structure was positioned between two climate chambers at different temperatures. The quasi-steady-state temperature distribution in the cavity and the transient moisture condition were measured. The material properties were also measured for use in numerical simulations. Both measurement and simulation results indicate that natural convection in a porous cavity not only increases heat flow through the structure but also significantly influences moisture redistribution within the structure. The model can predict the moisture distribution fairly well in a qualitative sense, and the heat flows quantitatively, in a good way.
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Author Information and Other Publications Notes
Riesner, K.
Department of Building Construction and Building Physics, University of Rostock, Wismar, Germany.
     
Wang, J.
Chalmers University of Technology, Gothenburg, Sweden.
  1. A numerical method for calculating combined heat, air and moisture transport in building envelope components
  2. A numerically stable algorithm for simplified calculations of combined heat, air and moisture transport
  3. An algorithm to accelerate simulations of simulataneous heat and gas transfer in gas-filled foams
  4. Heat and mass transfer in built structures: Numerical analyses
  5. Measurements of volatile organic compound (VOC) emissions from wood stains using an electronic balance  
Hagentoft, C.
Chalmers University of Technology, Gothenburg, Sweden.
  1. A numerical method for calculating combined heat, air and moisture transport in building envelope components
  2. A numerically stable algorithm for simplified calculations of combined heat, air and moisture transport
  3. An algorithm to accelerate simulations of simulataneous heat and gas transfer in gas-filled foams
  4. An example of application of limit state approach for reliability analysis of moisture performance of a building component
  5. Assessment method of numerical prediction models for combined heat, air and moisture transfer in building components: benchmarks for one-dimensional cases
  6. Durability control by means of hygrothermal history in building components
  7. International building physics toolbox, general report
  8. Moisture conditions in a north-facing wall with cellulos loose-fill insulation: construction with and without a vapor retarder and air leakage
  9. Prediction of driving rain intensities using potential flows
  10. Simulink modelling tool for HAM system analyses in building physics
  11. The International Building Physics Toolbox in Simulink  
Mainka, G.
Institute for Building Construction and Building Physics, University of Rostock, Wismar, Germany.
  1. High-performance wood-based panels substitute breathable membranes on external wall sheathings  


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