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Research Report (National Research Council Canada. Institute for Research in Construction) | 2009

Verification and validation

F. Tariku; S. M. Cornick; W. Maref

.......................................................................................................................................................... 4 INTRODUCTION.................................................................................................................................................. 4 VERIFICATION .................................................................................................................................................... 5 An Analytical Exercise ...................................................................................................................................... 5 Time step dependency .................................................................................................................................... 5 Grid dependency ............................................................................................................................................ 6 Error Analysis ................................................................................................................................................ 6 A Common Exercise .......................................................................................................................................... 8 Error Analysis ................................................................................................................................................ 8 Grid dependency ............................................................................................................................................ 8 Time step dependency .................................................................................................................................... 9 VALIDATION ....................................................................................................................................................... 9 Laboratory Testing ........................................................................................................................................... 12 Field validation ................................................................................................................................................. 13 DISCUSSION ...................................................................................................................................................... 16 CONCLUSIONS .................................................................................................................................................. 18 ACKNOWLEDGEMENTS ................................................................................................................................ 18 REFERENCES ..................................................................................................................................................... 19


Journal of Astm International | 2009

Assessment of Energy Rating of Polyurethane Spray Foam Walls: Procedure and Interim Results

W. Maref; Hakim Elmahdy; M. C. Swinton; F. Tariku

The application of polyurethane spray foam (SPF) insulation in buildings provides a durable and efficient thermal barrier. The industry is also promoting the SPF as an effective air barrier system in addition to its thermal insulation characteristics. In an effort to address these issues, a consortium of SPF manufacturers and contractors, jointly with the National Research Council of Canada’s Institute for Research in Construction conducted an extensive research project to assess the thermal and air leakage characteristics of SPF walls as well as conventional wall assemblies. The objective is to develop analytical and experimental procedures to determine a wall energy rating (WER) that captures both the thermal and airleakage performance of a wall assembly. The experimental part included two streams of testing: (1) To determine the wall air leakage rate at different conditions and (2) their thermal resistance, R-value, at different temperature differences. An analytical procedure was also developed to calculate WER by combining the heat loss due to thermal transmission and that due to air leakage with the aim of arriving at WER. Six conventional full-scale wood frame wall assemblies were built, two with glass fiber batts and of four with medium density SPF. Some walls were constructed without penetrations and others were built with penetrations. The testing regime included: (i) Initial testing of air leakage and thermal resistance; (ii) conditioning in the dynamic wall test facility according to an established routine; and (iii) retesting for air leakage and thermal resistance. This paper presents the results of six walls included in this project. The focus of this paper will be on presenting a brief summary of the project objective, testing protocol, and the theoretical approach to determine the WER number for the six walls.


Archive | 2002

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

Pascal Beaulieu; Mark Bomberg; S. M. Cornick; W. A. Dalgliesh; G. Desmarais; Reda Djebbar; M.K. Kumaran; M. A. Lacasse; John Lackey; W. Maref; Phalguni Mukhopadhyaya; M. Nofal; Nicole Normandin; M. Nicholls; T. O'Connor; J. D. Quirt; M. Z. Rousseau; M. N. Said; M. C. Swinton; F. Tariku; D. van Reenen


4th International Building Physics Conference | 2009

Hygrothermal performance of exterior wall systems using an innovative vapour retarder in Canadian climate

F. Tariku; W. Maref; Bruno Di Lenardo; S. Gatland


Archive | 2002

Report from task 8 of MEWS project - MEWS methodology for developing moisture management strategies - application to stucco clad wood-frame walls in north america

Pascal Beaulieu; Mark Bomberg; S. M. Cornick; W. A. Dalgliesh; G. Desmarais; Reda Djebbar; M.K. Kumaran; M. A. Lacasse; John Lackey; W. Maref; Phalguni Mukhopadhyaya; M. Nofal; Nicole Normandin; M. Nicholls; T. O'Connor; J. D. Quirt; M. Z. Rousseau; M. N. Said; M. C. Swinton; F. Tariku; D. van Reenen


Archive | 2010

Numerical simulations for determining the thermal response of wall systems with medium density polyurethane spray foams

F. Tariku; W. Maref; M. C. Swinton; A. H. Elmahdy


Archive | 2009

Moisture management and energy rating in building envelopes : Part II : Effects of two energy retrofit strategies on the wetting and drying potential of wall assemblies

W. Maref; A. H. Elmahdy; M. C. Swinton; F. Tariku


Archive | 2009

Moisture management and energy rating in building envelopes : Part III : Assessment of energy rating of polyurethane foam walls

W. Maref; A. H. Elmahdy; M. C. Swinton; F. Tariku


12th Canadian Conference of Building Science and Technology | 2009

Hygrothermal performance of RH-dependent vapour retarder in Canadian coastal climate

F. Tariku; W. Maref; Bruno Di Lenardo; S. Gatland


Archive | 2008

L'IRC-CNRC élabore un protocole d'évaluation pour un pare-vapeur novateur

W. Maref; F. Tariku; B. Di Lenardo

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W. Maref

National Research Council

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M. C. Swinton

National Research Council

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S. M. Cornick

National Research Council

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John Lackey

National Research Council

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M. A. Lacasse

National Research Council

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M. Nicholls

National Research Council

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M.K. Kumaran

National Research Council

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Pascal Beaulieu

National Research Council

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