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Numerical investigation of the influence of room factors on HAM transport in a full-scale experimental room

Li, Y., Fazio, P. and Rao, J.
2012
Building and Environment, Available online 6 November 2011
whole building HAM transport; CFD coupling; single simulation environment; wood paneling; large-scale test room; building envelope

Li, Y., Fazio, P. and Rao, J., (2012), "Numerical investigation of the influence of room factors on HAM transport in a full-scale experimental room", Building and Environment, Available online 6 November 2011.
Abstract:
To model the indoor environment influenced by room factors including moisture loads and ventilation conditions, the governing equations of heat, air and moisture (HAM) transport inside the room and through the envelope, including the coupling process of the interaction of heat and moisture between indoor air and envelope, need to be solved. This paper presents a CFD model of the indoor environment that takes into account the heat and moisture transfer through the envelope in a single simulation environment. The comparisons between experimental data and simulation results show close agreement. This model is then implemented in 12 cases to study the influence of moisture loads, ventilation rates, and positions of the air inlet and outlet on the indoor environment and on the heat and moisture transport through the envelope. Simulation results show that the humidity responses of the test room vary significantly for different moisture loads from 42 g/h to 91 g/h and for different ventilation rates from 0.5 air change per hour (ach) to 1 ach. Changing the positions of the ventilation vents alters the air flow pattern significantly, thus affecting the ventilation efficiency. With a heat and moisture source inside the test room, the changed ventilation efficiency influences the indoor environment significantly, especially under low ventilation rates. The increased ventilation rate carries away more heat and moisture, which reduces both temperature and moisture levels inside the room. Under the mixed convection condition, the indoor temperature and moisture levels dominate the heat and moisture transport through the wall system.

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Author Information and Other Publications Notes
Li, Y.
  1. Improved uncertainty for a modified commercial emissometer
  2. Mathematical solutions and numerical models employed for the investigations of PCMs' phase transformations
  3. Simple correction methods of infrared thermography for building exterior surfaces
  4. Technical development of rotary desiccant dehumidification and air conditioning: A review  
Fazio, P.
Paul Fazio, Professor of Building, Civil & Environmental Engineering, Concordia University, Montreal
  1. A limit state design (LSD) approach for comparing relative drying performance of wood-frame envelope systems with full-scale lab, A roadmap towards intelligent net zero- and positive-energy buildings,
  2. A new test method to determine the relative drying capacity of building envelope panels of various configurations
  3. A new testing method to evaluate the relative drying performance of different building envelope systems using water trays
  4. A quantitative study for the measurement of driving rain exposure in the Montr¨¦al region
  5. A review of research activities in energy efficiency in buildings in Canada
  6. Airtightness testing and air flow modeling of two and three-unit multifamily buildings
  7. Airtightness testing of two- and three-unit buildings with a single fan
  8. Approach for the simulation of wetting due to rain infiltration for building envelope testing
  9. Approach for urban driving rain index by using climatological data recorded at suburban meteorological station
  10. Behavior of wall assemblies with different wood sheathings wetted by simulated rain penetration
  11. Building Physics: 3rd International Conference in Building Physics
  12. Building pressurisation can affect possibility of mould growth
  13. Cavity pressure in rain screen walls
  14. Comparaison de m¨¦thodes de mesure de flux de chaleur pour sp¨¦cimens de grandes et moyennes dimensions
  15. Continuous folded plate structures under uniform load
  16. Creative case adaptation for building engineering design
  17. Design and construction of an environmental chamber facility
  18. Design Methodology of Solar Neighborhoods
  19. Development of experimental procedure to evaluate potential movement of mold spores from wall cavity to indoor environment
  20. Development of HAM tool for building envelope analysis
  21. Effect of capillarity on rainwater penetration in the building envelope
  22. Environmental chamber for investigation of building envelope performance
  23. Essai sur les toits plats isol¨¦s ¨¤ la fibre de cellulose
  24. Evaluation of radiance's genBSDF capability to assess solar bidirectional properties of complex fenestration systems
  25. Experimental evaluation of potential transport of mold spores from moldy studs in full-size wall assemblies
  26. Experimental setup for the study of air leakage patterns
  27. Experimental study of temperature distributions across two curtain wall systems
  28. Folded sandwich plate structures
  29. Identification and transport investigation of microbial volatile organic compounds in full-scale stud cavities
  30. IFC-based framework for evaluating total performance of building envelopes
  31. Impact of added insulation on air leakage patterns
  32. Impact of air leakage pattern on reinsulated walls
  33. In-cavity evaporation allowance--A drying capacity indicator for wood-frame wall system
  34. Influence of air space on multi-layered material water vapor permeability measurement
  35. Influence of facade geometry on weathering
  36. Integrated analysis of whole building heat, air and moisture transfer
  37. Interzonal air and moisture transport through large horizontal openings in a full-scale two-story test hut: Part 1 - Experimental study
  38. Interzonal air and moisture transport through large horizontal openings in a full-scale two-story test-hut: Part 2- CFD study
  39. Large scale testing of two flat roof assemblies insulated with cellulose
  40. Mapping of air leakage in exterior wall assemblies
  41. Measuring air leakage characteristics with flexible double air chambers
  42. Measuring air leakage of full-scale curtain wall sections using a non-rigid air-chamber method
  43. Methods for the assessment of moisture content of envelope assemblies
  44. Modeling of moisture behavior of wood planks in nonvented flat roofs
  45. Modelling of indoor air humidity: the dynamic behaviour within an enclosure
  46. Moisture buffering capacities of five North American building materials
  47. Moisture performance of leaky exterior walls with added insulation
  48. Nonlinear elastic analysis of panelized shear sandwich walls
  49. Performance evaluation protocol for full-scale wood-frame building envelopes
  50. Potential of rain screen walls to prevent rain penetration: pressurized cavity principle
  51. Quantitative driving rain exposure on a vertical wall at various Canadian cities
  52. Rapport Final Projet Site Internet - L'enveloppe du batiment et l'efficacit¨¦ ¨¦nerg¨¦tique
  53. Review and framework for large-scale laboratory studies on wetting and drying of building envelopes
  54. Study of the reduced impact of thermal bridges in two sprayed-applied polyurethane wall assemblies
  55. Study on thermal performance of curtain walls using infrared thermography
  56. Test method to measure the relative capacity of wall panels to evacuate moisture from their stud cavity
  57. Testing of flat roofs insulated with cellulose fiber
  58. The dynamic modelling of air humidity behaviour in a multi-zone space
  59. Transfer of heat, moisture and air through metal curtain walls
  60. Transient model for coupled heat, air and moisture transfer through multilayered porous media
  61. Use of an environmental chamber to investigate large-scale envelope specimen hygrothermal performance  
Rao, J.
Department of Building, Civil, and Environmental Engineering, Concordia University, Montreal
  1. A limit state design (LSD) approach for comparing relative drying performance of wood-frame envelope systems with full-scale lab, A roadmap towards intelligent net zero- and positive-energy buildings,
  2. A new test method to determine the relative drying capacity of building envelope panels of various configurations
  3. A new testing method to evaluate the relative drying performance of different building envelope systems using water trays
  4. Building Physics: 3rd International Conference in Building Physics
  5. Building pressurisation can affect possibility of mould growth
  6. Comparaison de m¨¦thodes de mesure de flux de chaleur pour sp¨¦cimens de grandes et moyennes dimensions
  7. Design and construction of an environmental chamber facility
  8. Development of experimental procedure to evaluate potential movement of mold spores from wall cavity to indoor environment
  9. Development of HAM tool for building envelope analysis
  10. Effect of capillarity on rainwater penetration in the building envelope
  11. Environmental chamber for investigation of building envelope performance
  12. Evaluation of radiance's genBSDF capability to assess solar bidirectional properties of complex fenestration systems
  13. Experimental evaluation of potential transport of mold spores from moldy studs in full-size wall assemblies
  14. Experimental study of temperature distributions across two curtain wall systems
  15. Identification and transport investigation of microbial volatile organic compounds in full-scale stud cavities
  16. In-cavity evaporation allowance--A drying capacity indicator for wood-frame wall system
  17. Interzonal air and moisture transport through large horizontal openings in a full-scale two-story test hut: Part 1 - Experimental study
  18. Interzonal air and moisture transport through large horizontal openings in a full-scale two-story test-hut: Part 2- CFD study
  19. Measuring air leakage characteristics with flexible double air chambers
  20. Measuring air leakage of full-scale curtain wall sections using a non-rigid air-chamber method
  21. Review and framework for large-scale laboratory studies on wetting and drying of building envelopes
  22. Statistical analysis of microbial volatile organic compounds in an experimental project: identification and transport analysis
  23. Study of the reduced impact of thermal bridges in two sprayed-applied polyurethane wall assemblies
  24. Test method to measure the relative capacity of wall panels to evacuate moisture from their stud cavity
  25. Transfer of heat, moisture and air through metal curtain walls
  26. Use of an environmental chamber to investigate large-scale envelope specimen hygrothermal performance  


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