Conceptual Reference Database for Building Envelope Research Prev
Next

An educational hygrothermal model: WUFI-ORNL/IBP

Karagiozis, A., Kuenzel, H., Holm, A. and Desjarlais, A.
1999
Report

Karagiozis, A., Kuenzel, H., Holm, A. and Desjarlais, A., (1999), An educational hygrothermal model: WUFI-ORNL/IBP, Report.
Abstract:
Moisture engineering is becoming an important task in the overall design of building enclosures in both North America and Europe. Several methods may be used to design wall systems, and modeling is definitively the most flexible approach. There is an increasing demand for calculation methods to assess the moisture behavior of building components. In North America alone, the estimated cost in increased energy consumption due to the presence of moisture is approximately $1 billion dollars annually. Current tasks, such as preserving historical buildings or restoring and insulating existing buildings are closely related to the moisture tolerance in a building structure. Calculative analyses are becoming increasingly important due to the expensive and time-consuming experimental investigations and the limited transferability to real situations. The Oak Ridge National Laboratory (Building Technology Center) and the Fraunhofer Institute for Building Physics in an international collaboration have jointly developed a moisture engineering assessment model that predicts the transient transport of heat and moisture. This model, WUFIORNL/ IBP is now available in North America free of charge, and can be downloaded via the Internet at: www.ornl.gov/btc/moisture. The unique features of this particular model are that it incorporates vapor and diffusion transport mechanism, along with realistic boundary conditions that include wind-driven rain. This alone may account for more than 80% of the total moisture load in envelopes. In addition this model is tailored to North American materials and construction practices and has a very friendly user interface that appeals to both architects and engineers. The model is also the most benchmarked hygrothermal model developed, since 1994.

Ref (selected)

Karagiozis, A.N., 2000, Advanced Hygrothermal Model MOISTURE-EXPERT, Oak Ridge National Laboratory, Report I

Krus, M.: Moisture Transport and Storage Coefficients of Porous Mineral Building Materials -Theoretical Principals and New Test Methods. IRB, Stuttgart 1996.

Kščnzel, H.M.: Simultaneous Heat and Moisture Transport in Building Components. IRB, Stuttgart 1995

Kščnzel, H.M., Karagiozis, A.N. and Holm A. 2001., WUFI-ORNL/IBP A- Hygrothermal Design Tool for Architects ans Engineers, Chapter ASTM Manual 40 in Moisture Analysis of Buildings
Related Resources:

Related Concepts

Author Information and Other Publications Notes
Karagiozis, A.
Achilles N. Karagiozis, Oak Ridge National Laboratory, Building Technology Center, Oak Ridge
  1. A North American research approach to moisture design by modeling
  2. Advanced hygrothermal modeling of building materials using MOISTURE-EXPERT 1.0
  3. Advanced hygrothermal models and design models
  4. Applied moisture engineering
  5. Barrier EIFS clad walls: Results from a moisture engineering study
  6. Boundary element analysis of uncoupled quasi-static hygrothermoelasticity for two-dimensional composite walls
  7. Building enclosure hygrothermal performance study phase I
  8. Drying capabilities of wood frame walls with wood siding
  9. EIFS hygrothermal performance due to initial construction moisture as a function of air leakage, interior cavity insulation, and climate conditions
  10. Hygrothermal system-performance of a whole building
  11. Importance of moisture control in building performance
  12. Influence of material properties on the hygrothermal performance of a high-rise residential wall
  13. Integrated approaches for moisture analysis
  14. Integrated hygrothermal performance of building envelopes and systems
  15. Measurements and two-dimensional computer simulations of the hygrothermal performance of a wood frame wall
  16. Moisture transport in building envelopes using an approximate factorization solution method
  17. Position paper on material characterization and HAM model benchmarking
  18. Simulation of indoor temperature and humidity conditions including hygrothermal interactions with the building envelope
  19. Wind-driven rain distributions on two buildings
  20. WUFI-ORNL/IBP - A North American Hygrothermal Mode  
Kuenzel, H.
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. Position paper on material characterization and HAM model benchmarking
  2. Practical application of an uncertainty approach for hygrothermal building simulations--drying of an AAC flat roof
  3. The hygrothermal behaviour of rooms: combining thermal building simulation and hygrothermal envelope calculation
  4. Uncertainty approaches for hygrothermal building simulations - drying of an AAC flat roof in different climates  
Holm, A.
Gunnar Holm Department of Biotechnology, Technical University of Denmark, Building 221, DK-2800 Lyngby, Denmark.
  1. Combined effect of temperature and humidity of the detoriation process of insulation materials in ETICS
  2. Determination of moisture and salt content distributions by combining NMR and gamma ray measurements
  3. Drying of an AAC flat roof in different climates Computational sensitivity analysis versus material property measurements
  4. Moisture buffering effects of interior linings made from wood or wood based products
  5. Moisture-buffering effect - experimental investigations and validation
  6. Non-isothermal moisture transfer in porous building materials
  7. Position paper on material characterization and HAM model benchmarking
  8. Practical application of an uncertainty approach for hygrothermal building simulations--drying of an AAC flat roof
  9. Previous Experimental Studies and Field Measurements on Moisture Buffering by Indoor Surface Materials
  10. Simulation of indoor temperature and humidity conditions including hygrothermal interactions with the building envelope
  11. Stochastic building envelope modeling -- the influence of material properties
  12. The hygrothermal behaviour of rooms: combining thermal building simulation and hygrothermal envelope calculation
  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  
Desjarlais, A.
Program Manager, Building Materials and Structures, Oak Ridge National Laboratory, Bethel Valley Rd., Bldg 3147, Oak Ridge, TN 37831-6070, e-mail: yt7@ornl.gov
  1. Investigation of common thermal bridges in walls
  2. Laboratory measurements of the drying rates of low-slope roofing systems
  3. Moisture control in low-slope roofing: a new design requirement
  4. Moisture studies of a self-drying roof: tests in the large-scale climate simulator and results from thermal and hygric models
  5. Moisture: its effects on the thermal performance of a low-slope roof system
  6. Self-drying roofs: What? No dripping!
  7. The whole wall thermal performance calculator-on the net
  8. Water-vapor measurements of low-slope roofing materials
  9. Whole wall rating/label for structural insulated panel: steady-state thermal analysis  


CRDBER, at CBS, BCEE, ENCS, Concordia,