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Integrated Methodology for Evaluation of Energy Performance of the Building Enclosures -- Part 1: Test Program Development

Bomberg, M., Thorsell, T.
2008
Journal of Building Physics, Vol. 32, No. 1, 33-48 (2008)
energy efficiency ? heat losses and gains ? low energy housing ? thermal performance ? heat ? air and moisture transfer

Bomberg, M., Thorsell, T., (2008), "Integrated Methodology for Evaluation of Energy Performance of the Building Enclosures -- Part 1: Test Program Development", Journal of Building Physics, Vol. 32, No. 1, 33-48 (2008).
Abstract:
As a result of increased concern with energy consumption in the industrial world, it is only natural to look towards the building sector to seek significant improvements to meet expectations of the society. After all, the building sector consumes more energy than the transportation sector. Yet, the procedures that are used to define the thermal performance of, for example a wall, are typically based on the tests performed on dry materials, without consideration of air and moisture movements. In other words, these tests represent arbitrary rating conditions because we know that the energy performance of materials and building assemblies are affected by moisture and air flows. It is believed that to improve their energy performance one must have more precise means of evaluation of their field performance that would also include the consideration of air and moisture transfer conditions. In the first part of this article a background for the evaluation of thermal performance by traditional testing with calibrated boxes shows that use of these tests is limited. The average heat flow that they measure is sufficient to rate the wall assemblies but insufficient to calculate its thermal performance under field conditions. To include the effect of climate on thermal performance one must use computer models that are capable of simultaneous calculations of heat, air, and moisture transfer. Effectively, to characterize energy performance of the building enclosure one must simultaneously use assembly testing and modeling, i.e., an integrated methodology. In the second part of the article, this integrated testing and modeling methodology is applied to a few selected residential and commercial walls to highlight the magnitude of air flow effects on the steady-state thermal resistance. The integrated methodology proposed by Syracuse University includes several other aspects of hygrothermal performance evaluations. Those aspects will be addressed in later parts of this article series.

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Author Information and Other Publications Notes
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 3 ¡ª uncertainty in thermal measurem
  10. Modified cup for testing of water vapour transmission through thick, permeable materials
  11. Moisture management of EIFS walls. Part 1.The basis for evaluation
  12. Performance evaluation of exterior insulation and finish systems (EIFS)
  13. Position paper on material characterization and HAM model benchmarking
  14. 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
  15. Report from Task 8 of MEWS Project - MEWS Methodology for Developing Moisture Management Strategies - Application to Stucco Clad Wood-Frame Walls in North America
  16. The energy conundrum of modern buildings
  17. Three-dimensional analysis of thermal resistance of exterior basement insulation systems (EIBS)
  18. Towards an engineering model of material characteristics for input to ham transport simulations - Part 1: an approach
  19. Water vapor transmission and moisture accumulation in polyurethane and polyisocyanurate foams
  20. Water vapor transmission through building materials and system: mechanisms and measurement  
Thorsell, T.
  1. Integrated methodology for evaluation of energy performance of the building enclosures: part 3 ¡ª uncertainty in thermal measurem  


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