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Measuring and modeling vapor boundary layer growth during transient diffusion heat and moisture transfer in cellulose insulation

Simonson, C. J., Salonvaara, M., Ojanen, T., Walker, I. and Levin, H.
2004
ASHRAE Transactions, Volume 110 PART II, Pages 804-819

Simonson, C. J., Salonvaara, M., Ojanen, T., Walker, I. and Levin, H., (2004), "Measuring and modeling vapor boundary layer growth during transient diffusion heat and moisture transfer in cellulose insulation", ASHRAE Transactions, Volume 110 PART II, Pages 804-819.
Abstract:
This paper contains a numerical study of the indoor temperature, humidity, and comfort and indoor air quality conditions in a bedroom located in Saint Hubert, Belgium. The performance of the bedroom is presented for a range of constant outdoor ventilation rates (0.1 ach to 1 ach) with and without hygroscopic materials. The results show that the conditions in the bedroom improve significantly as the ventilation rate increases and when hygroscopic materials replace nonhygroscopic materials. In general, increasing the ventilation has a stronger impact on the average indoor conditions than applying hygroscopic materials, but the impacts of ventilation and hygroscopic materials can be similar during certain operating conditions. These results suggest that the ventilation rate could be decreased slightly in a room with hygroscopic materials without degrading the indoor humidity, comfort and air quality conditions. The possible decrease typically ranges from 20% to 50% depending on the variables and criteria chosen.

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Author Information and Other Publications Notes
Simonson, C. J.
  1. An experimental data set for benchmarking 1-D, transient heat and moisture transfer models of hygroscopic building materials. Part II: Experimental, numerical and analytical data
  2. Effect of initial conditions, boundary conditions and thickness on the moisture buffering capacity of spruce plywood
  3. Heat and mass transfer between indoor air and a permeable and hygroscopic building envelope: part I -- field measurements
  4. Heat and mass transfer between indoor air and a permeable and hygroscopic building envelope: part II --verification and numerical studies
  5. Improving indoor climate and comfort with wooden structures
  6. Integration of simplified drying tests and numerical simulation in moisture performance analysis of the building envelope
  7. Moisture buffering capacity of hygroscopic building materials: Experimental facilities and energy impact
  8. Moisture performance of an airtight, vapor-permeable building envelope in a cold climate
  9. Moisture, thermal and ventilation performance of Tapanila ecological house  
Salonvaara, M.
Research Scientist, VTT Building Technology, Espoo, Finland
  1. Drying capabilities of wood frame walls with wood siding
  2. EIFS hygrothermal performance due to initial construction moisture as a function of air leakage, interior cavity insulation, and climate conditions
  3. Heat and mass transfer between indoor air and a permeable and hygroscopic building envelope: part I -- field measurements
  4. Heat and mass transfer between indoor air and a permeable and hygroscopic building envelope: part II --verification and numerical studies
  5. Hygrothermal performance of a new light gauge steel-framed envelope system
  6. Hygrothermal system-performance of a whole building
  7. Improving indoor climate and comfort with wooden structures
  8. Influence of material properties on the hygrothermal performance of a high-rise residential wall
  9. Integrated hygrothermal performance of building envelopes and systems
  10. Integration of simplified drying tests and numerical simulation in moisture performance analysis of the building envelope
  11. Measurements and two-dimensional computer simulations of the hygrothermal performance of a wood frame wall
  12. Moisture transport in building envelopes using an approximate factorization solution method
  13. Numerical simulation of mould growth in timber frame walls
  14. Prediction of hygrothermal performance of building envelope parts coupled with indoor climate
  15. Stochastic building envelope modeling -- the influence of material properties  
Ojanen, T.
Tiiomo Ojanen Senior research scientist VTT Building Technology, Finland.
  1. Drying capabilities of wood frame walls with wood siding
  2. Effect of exfiltration on the hygrothermal behaviour of a residential wall assembly: results from calculations and computer simulations
  3. Heat and mass transfer between indoor air and a permeable and hygroscopic building envelope: part I -- field measurements
  4. Heat and mass transfer between indoor air and a permeable and hygroscopic building envelope: part II --verification and numerical studies
  5. Improving indoor climate and comfort with wooden structures
  6. Improving the drying efficiency of timber frame walls in cold climates, by using exterior insulation
  7. Integration of simplified drying tests and numerical simulation in moisture performance analysis of the building envelope
  8. Modeling heat, air and moisture transport through building materials and components
  9. Moisture and bio-deterioration risk of building materials and structuresL?hdesm?ki
  10. Moisture buffer value of building materials
  11. Moisture Buffer Value of Materials in Buildings
  12. Moisture performance of an airtight, vapor-permeable building envelope in a cold climate
  13. Moisture transport coefficient of pine from gamma ray absorption measurements
  14. Numerical simulation of mould growth in timber frame walls
  15. Thermal and moisture performance of a sealed cold-roof system with a vapor-permeable underlay
  16. Towards modelling of decay risk of wooden materials  
Walker, I.
Energy Performance of Buildings Group, Energy and Environment Division, Lawrence Berkeley National Laboratory Berkeley, CA USA
  1. Interior moisture design loads for residences
  2. Long-Term field monitoring of an EIFS clad wall  
Levin, H.
  1. Indoor Air 2002, Proceedings: 9th International Conference on Indoor Air Quality and Climate Monterey  


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