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Towards an engineering model of material characteristics for input to ham transport simulations - Part 1: an approach

Grunewald, J., H?upl, P., Bomberg, M.
2003
Journal of Thermal Envelope and Building Science, Vol. 26, No. 4, 343-366

Grunewald, J., H?upl, P., Bomberg, M., (2003), "Towards an engineering model of material characteristics for input to ham transport simulations - Part 1: an approach", Journal of Thermal Envelope and Building Science, Vol. 26, No. 4, 343-366.
Abstract:
Heat, Air and Moisture (HAM) modelling of building performance is a quite young research subject but the experimental determination of material properties is often based on classical methods. One should review the manner in which we define characteristic material parameters and there is a need to develop an approximation used to generate the required material functions for input to HAM-transport simulations. The paper presents such an approach, called an engineering model for hygrothermal material characterisation.

The paper poses the question, how to arrive at input data that can be used for a model based on thermodynamically defined potentials (Only such a model allows introduction of new potential components (freezing depression, osmotic pressure, air pressure, overburden envelope pressure)) (e.g., Grunewald, J. (1997) and Grunewald, J. (1999)) and yet the respective functions used to describe changes in the material response as a function of the variables of state. Such functions should have a reasonable precision and goodness of fit while the number of measured points must be reduced to a minimum. Those measurements should be relatively easy to perform (i.e., they would not require determination of temporal and spatial profiles of moisture).

This discussion paper highlights steps already taken (Part 1), and lists issues that need to be resolved before reaching this goal (Part 2).
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Author Information and Other Publications Notes
Grunewald, J.
Technology University of Dresden, Faculty of Architecture, Institute of Building Climatology Zellescher Weg 17, 01069 Dresden
  1. A two-levelled hygrothermal material database for the numerical simulation program DELPHIN4
  2. Documentation of the Numerical Simulation Program DIM3.1, Volume 1: Theoretical Fundamentals
  3. Evaluation of discretized transport properties for numerical modelling of heat and moisture transfer in building structures
  4. Modified cup for testing of water vapour transmission through thick, permeable materials
  5. Numerical and experimental investigation of coupled heat and moisture transport problems
  6. On the hysteresis in moisture storage and conductivity measured by the instantaneous profile method
  7. Position paper on material characterization and HAM model benchmarking  
H?upl, P.
Institute of Building Climatology, Faculty of Architecture, University of Technology, Dresden, Germany.
  1. A two-levelled hygrothermal material database for the numerical simulation program DELPHIN4
  2. Numerical and experimental investigation of coupled heat and moisture transport problems  
Bomberg, M.
  1. Analysis of selected water absorption coefficient measurements
  2. Building envelope and environmental control - Part 3: Issues of system integration
  3. Building envelope and environmental control: issues of system integration
  4. Building envelope design, Part 2: estimating field performance of thermal insulation
  5. Building envelope: Heat, air and moisture interactions
  6. Final Report from Task 8 of MEWS Project (T8-03) - Hygrothermal Response of Exterior Wall Systems to Climate Loading: Methodology and Interpretation of Results for Stucco, EIFS, Masonry and Siding Clad Wood-Frame Walls
  7. Heat, air and moisture control in walls of Canadian houses: a review of the historic basis for current practices
  8. In-Situ performance evaluation of exterior insulation basement systems (EIBS) - spray polyurethane foam: summary report
  9. Integrated Methodology for Evaluation of Energy Performance of the Building Enclosures -- Part 1: Test Program Development
  10. Integrated methodology for evaluation of energy performance of the building enclosures: part 3 ¡ª uncertainty in thermal measurem
  11. Modified cup for testing of water vapour transmission through thick, permeable materials
  12. Moisture management of EIFS walls. Part 1.The basis for evaluation
  13. Performance evaluation of exterior insulation and finish systems (EIFS)
  14. Position paper on material characterization and HAM model benchmarking
  15. Report from Task 2 of MEWS Project - Description of 17 Large Sale Wall Specimens Built for Water Entry Investigation in IRC Dynamic Wall Testing Facility
  16. Report from Task 8 of MEWS Project - MEWS Methodology for Developing Moisture Management Strategies - Application to Stucco Clad Wood-Frame Walls in North America
  17. The energy conundrum of modern buildings
  18. Three-dimensional analysis of thermal resistance of exterior basement insulation systems (EIBS)
  19. Water vapor transmission and moisture accumulation in polyurethane and polyisocyanurate foams
  20. Water vapor transmission through building materials and system: mechanisms and measurement  


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