/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10. 1080/19401490802706653 Journal of Building Performance Simulation, 2, 1, pp. 15-30, 2009-03-01 Synthetically derived profiles for representing occupant-driven electric loads in Canadian Housing Armstrong, M. M.; Swinton, M. C.; Ribberink, H.; Beausoleil-Morrison, I.; Millette, J. Synthetically Derived Profiles for Representing Occupant-Driven Electric Loads in Canadian Housing ABSTRACTAs one objective of IEA/ECBCS Annex 42, detailed Canadian household electrical demand profiles were created using a bottom-up approach from available inputs including a detailed appliance set, annual consumption targets, and occupancy patterns. These profiles were created for use in the simulation of residential cogeneration devices to examine issues of system performance, efficiency and emission reduction potential. This paper describes the steps taken to generate these 5-minute electrical consumption profiles for three target single-family detached households -low, medium and high consumers, a comparison of the generated output with measured data from Hydro Québec, and a demonstration of the use of the new profiles in building performance simulations of residential cogeneration devices.

/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1016/j.buildenv.2011.01.009Journal of Building and Environment, 46, 7, pp. 1403-1414, 2011 Thermal analysis of above-grade wall assembly with low emissivity materials and furred-airspace Saber, H. H.; Maref, W.; Swinton, M. C.; St-Onge, C. The material in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission. For more information visit http://laws.justice.gc.ca/en/showtdm/cs/C-42Les renseignements dans ce document sont protégés par la Loi sur le droit d'auteur, par les lois, les politiques et les règlements du Canada et des accords internationaux. Ces dispositions permettent d'identifier la source de l'information et, dans certains cas, d'interdire la copie de documents sans permission écrite. Pour obtenir de plus amples renseignements : http://lois.justice.gc.ca/fr/showtdm/cs/C-42 Abstract A 3D numerical model was developed to investigate the effect of foil emissivity on the effective thermal resistance of an above-grade wall assembly with foil bonded to wood fibreboard in a furred assembly having airspace next to the foil. This model solved simultaneously the energy equation in the various material layers, the surface-to-surface radiation equation in the furred airspace assembly, Navier-Stokes equation for the airspace, and Darcy and the Brinkman equations for the porous material layers. In this work, the furring was installed horizontally. In the first phase, the present model was benchmarked against the experimental data generated by a commercial laboratory for an above-grade wall assembly. The wall consists of a conventional wood frame structure sheathed with fibreboard and covered on the interior side with a low emissivity material bonded to wood fibreboard that is adjacent to a furred airspace assembly. The results showed that the predicted R-value was in good agreement with the measured one. After gaining confidence in the present model, it was used to predict the effective thermal resistance of the same above-mentioned wall but having Oriented Strand Board (OSB) sheathing in lieu of wood fibreboard sheathing. In the second phase, the mode...

/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1177/1744259112444021Journal of Building Physics, 36, 2, pp. 163-177, 2012-10-22 Numerical modeling and experimental investigations of thermal performance of reflective insulations Saber, Hamed H.; Maref, Wahid; Sherrer, Gordon; Swinton, Michael C. AbstractReflective insulations are being used in attics, flat roof and wall systems. Numerical modelling and experimental investigations were conducted to assess the thermal performance of assemblies with reflective insulations. In this paper, the present model was used to verify the use of the ASTM C-518 test method for measuring the effective thermal resistances (R-values) of sample stacks comprising reflective insulations. Two tests were conducted on sample stacks using heat flow meter apparatus. The sample stack consists of two EPS layers and a reflective insulation installed in between. The model predictions agreed with measured heat fluxes within ±1%. The paper also discusses the combined effect of heat transfer by convection and radiation in the airspace facing the reflective insulation, showing that the derived R-value from the test data resulted in underestimation of the effective R-value of the sample stack.

No abstract

http://www.nrc-cnrc.gc.ca/ircThe material in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission. For more information visit http://laws.justice.gc.ca/en/showtdm/cs/C-42Les renseignements dans ce document sont protégés par la Loi sur le droit d'auteur, par les lois, les politiques et les règlements du Canada et des accords internationaux. Ces dispositions permettent d'identifier la source de l'information et, dans certains cas, d'interdire la copie de documents sans permission écrite. Pour obtenir de plus amples renseignements : http://lois.justice.gc.ca/fr/showtdm/cs/C-42 In basement wall systems, airspaces can contribute in obtaining a higher thermal resistance, if a low emissivity material such as reflective foil is installed within a furredairspace. In this study, numerical simulations were conducted using the hygrothermal model "hygiRC-C" that was developed at the National Research Council of Canada's Institute for Research in Construction (NRC-IRC) to investigate the steady-state and transient thermal performance of basement wall systems.This model solves simultaneously the energy equation in the various material layers, surface-to-surface radiation equation in the Furred-Airspace Assembly (FAA) , Navier-Stokes equation for the airspace, and Darcy and Brinkman equations for the porous material layers. The wall systems used in the simulations incorporate a low emissivity material (foil with emissivity = 0.04) bonded to a moulded/expanded polystyrene (EPS) foam that is installed in a furred-airspace assembly. The furring is installed horizontally and covered with a gypsum board. The structural element of the wall (external layer) is a poured-inplace concrete. Walls with and without FAA were considered in this study. Also, consideration was given to investigate the effect of the above-grade and below-grade portions of the wall on the thermal performance when these walls are subjected to two different Canadian climates. Results showed that at steady state condition, the effective thermal resistance (R-value) of the wall with a FAA depends on the soil, outdoor and indoor temperatures. Additionally, these wall configurations resulted in an energy savings of -17% compared to walls without FAA when these walls are subjected to two different climate conditions.