Field monitorings of thermal performance of residential 2 x 6 wood-frame wall systems that had been retrofitted using vacuum insulation panels (VIPs) and extruded polystyrene foam (XPS) panels were undertaken in May 2011 – May 2012 at the Field Exposure of Walls Facility (FEWF) of NRC-Construction. The main objective of this research was to measure the steady-state and transient thermal performance of three wall assemblies (4 ft x 6 ft), two of which incorporated VIPs within an XPS Tongue and Groove (T&G) configuration and VIPs within an XPS Clip-On (C-O) configuration, and a third assembly incorporating only XPS. The three wall assemblies were installed in the FEWF for 1-year cycle of exposure to outdoor natural weather conditions. The hygIRC-C model was used in this study. The results of the model calculations were in good agreement with the experimental data. Given that the VIPs could be punctured during the installation process or could fail during normal operating conditions, additional model calculations were used to predict the thermal resistance in cases where one or more VIPs failed. The model was also used to predict the yearly cumulative heat losses across these wall systems. It is important to point out that the aging effect and the effect of the thermal bridging due to envelope (i.e. skin) of the VIPs are not accounted for in this study. However, sensitivity analysis of the thickness and thermal conductivity of the VIP envelope was conducted to investigate the effect of these parameters on the effective thermal resistance of VIP.
ArmstrongMMarefWSaberHH. (2011a) The impact of the thermal mass on field energy performance of insulating concrete form (ICF) wall. In: International workshop on whole building testing, evaluation and modeling for energy assessment, NRCC-54485, Copenhagen, 18May2011, pp. 1–12. Available at: http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=shwart&index=an&req=20374943&lang=en
2.
ArmstrongMSaberHHMarefW. (2011b) Field energy performance of an insulating concrete form (ICF) wall. In: 13th Canadian conference on building science and technology, Winnipeg, MB, Canada, 10–13May2011.
3.
ASHRAE (2009) 2009 ASHRAE Handbook—Fundamentals (SI Edition). Ch. 26. Atlanta, GA: American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
4.
ASTM C1130-07:2009 (2009) Standard practice for calibrating thin heat flux transducers (Annual Book of ASTM Standards, section 4: Construction, vol. 04.06: Thermal Insulation; Building and Environment Acoustic, pp. 577–584).
5.
ASTM C1363:2006 (2006) Standard test method for the thermal performance of building materials and envelope assemblies by means of a hot box apparatus (Annual Book of ASTM Standards, vol. 04.06, pp. 717–59). Available at: www.astm.org
6.
ASTM C518-04:2007 (2007) Steady-state thermal transmission properties by means of the heat flow meter apparatus (Annual Book of ASTM Standards, section 4, vol. 04.06: Thermal Insulation).
7.
BinzASteinkeG (2005) Applications of vacuum insulation in the building sector. In: 7th international vacuum insulation symposium proceedings, Zurich, 28–29 September, pp. 43–48. Duebendorf: EMPA.
8.
CremersJM (2005) Typology of applications for opaque and translucent VIP in the building envelope and their potential for temporary thermal insulation. In: 7th international vacuum insulation symposium proceedings, Zurich, 28–29 September, pp. 189–196. Duebendorf: EMPA.
9.
ElmahdyHMarefMSaberHH (2010) Assessment of the energy rating of insulated wall assemblies a step towards building energy labelling. In: 10th international conference for enhanced building operations (ICEBO 2010), Kuwait, 26–28 October 2010.
High Performance Thermal Insulation (HiPTI) (2005) Vacuum insulation in the building sector: systems and applications. IEA/ECBCS Annex 39. HiPTI. Edited by: Mark Zimmermann and Hans Bertschinger, Swiss Federal Laboratories for Materials Testing and Research Centre for Energy and Sustainability in Buildings.
12.
MarefW (2011) Program of Energy Research and Development—PERD. Internal Communication. 27April.
13.
MarefWKumaranMKLacasseMA. (2002) Laboratory measurements and benchmarking of an advanced hygrothermal model. In: Proceedings of the 12th international heat transfer conference, Grenoble, 18–23 August, NRCC-43054, pp. 117–122. Heat Transfer, vol. 3. Elsevier. ISBN: 284299308X
14.
MarefWSaberHHArmstrongMM. (2012a) Integration of vacuum insulation panels into Canadian wood frame walls. Report 1: Performance Assessment in the Laboratory, Client Report—B1253, Building Envelope Engineering Materials Program, Construction Portfolio. Ottawa, ON, Canada: National Research Council of Canada.
15.
MarefWSaberHHGanapathyG. (2012b) Field energy performance and hygrothermal evaluation of different strategies of energy retrofit for residential wood-frame wall systems field using VIP, part I—field monitoring and thermal performance. Internal Research Report, National Research Council of Canada, Ottawa, ON, Canada, December.
16.
MarefWSaberHHGlazerR. (2011) Energy performance of highly insulated wood-frame wall systems using a VIP. In: 10th international vacuum insulation symposium, Ottawa, ON, Canada, 15–16 September 2011, pp. 68–76. Ottawa, ON, Canada: National Research Council Canada.
17.
MukhopadhyayaP (2006) High performance vacuum insulation panel-research update from Canada (NRCC-48705, pp. 1–16). Global Insulation Magazine, 1October, pp. 9–15.
18.
MukhopadhyayaP (2010) High-performance thermal insulation—better than ever. Solplan Review, vol. 153, 17July, pp. 1–3.
19.
MukhopadhyayaPKumaranMKNormandinN. (2008) High performance vacuum insulation panel: development of alternative core materials. Journal of Cold Regions Engineering22(4): 103–123 (NRCC-49493).
20.
MukhopadhyayaPKumaranMKNormandinN. (2009) Fiber-powder composite as core material for vacuum insulation panel. In: 9th international vacuum insulation symposium, London, 17–18 September, pp. 1–9, SINTEF S12694, IVIS 2009.
21.
OgdenRKendrickC (2005) VIP cladding panels for buildings: applications and conceptual solutions. In: 7th international vacuum insulation symposium proceedings, Zurich, 28–29 September 2005, pp. 153–160. Duebendorf: EMPA.
22.
RogatzkiP (2009) Pre-fabricated cavity walls—the potential for vacuum insulated panels. In: 9th international vacuum insulation symposium, 17–18 September, London, pp. 1–26, SINTEF S12694, IVIS 2009.
23.
SaberHH (2012) Investigation of thermal performance of reflective insulations for different applications. Building and Environment52: 32–44.
24.
SaberHH (2013) Thermal performance of wall assemblies with low emissivity. Journal of Building Physics36(3): 308–329.
25.
SaberHHLaouadiA (2011) Convective heat transfer in hemispherical cavities with planar inner surfaces (1415-RP). ASHRAE Transactions117(2): 713.
26.
SaberHHMarefW (2012) Effect of furring orientation on thermal response of wall systems with low emissivity material and furred-airspace. In: The building enclosure science and technology (BEST3) conference, Atlanta, GA, 2–4 April 2012.
27.
SaberHHSwintonMC (2010) Determining through numerical modeling the effective thermal resistance of a foundation wall system with low emissivity material and furred-airspace. In: International conference on building envelope systems and technologies, ICBEST 2010, Vancouver, BC, Canada, 27–30 June 2010.
28.
SaberHHMarefWGanapathyG (2012a) Field energy performance and hygrothermal evaluation of different strategies of energy retrofit for residential wood-frame wall systems using VIP, part II: model benchmarking and numerical simulations. Internal Research Report, National Research Council of Canada, Ottawa, ON, Canada, December.
SaberHHMarefWArmstrongMM. (2010a) Benchmarking 3D thermal model against field measurement on the thermal response of an insulating concrete form (ICF) wall in cold climate. In: Eleventh international conference on thermal performance of the exterior envelopes of whole buildings XI, Clearwater, FL, 4–9 December 2010.
31.
SaberHHMarefWArmstrongMM. (2011a) Numerical simulations to predict the thermal response of insulating concrete form (ICF) wall in cold climate. Research Report-310, 1April. Ottawa, ON, Canada: NRC Institute for Research in Construction.
32.
SaberHHMarefWElmahdyH. (2010b) 3D thermal model for predicting the thermal resistances of spray polyurethane foam wall assemblies. In: Building XI conference, Clearwater, FL, 5–9 December 2010.
33.
SaberHHMarefWElmahdyH. (2012c) 3D heat and air transport model for predicting the thermal resistances of insulated wall assemblies. Journal of Building Performance Simulation5(2): 75–91 (NRCC-53583). Available at: http://dx.doi.org/10.1080/19401493.2010.532568
34.
SaberHHMarefWLacasseMA. (2010c) Benchmarking of hygrothermal model against measurements of drying of full-scale wall assemblies. In: International conference on building envelope systems and technologies, ICBEST 2010, Vancouver, BC, Canada, 27–30 June 2010.
35.
SaberHHMarefWSherrerG. (2012d) Numerical modeling and experimental investigations of thermal performance of reflective insulations. Journal of Building Physics36(2): 163–177 (NRCC-54538).
36.
SaberHHMarefWSwintonMC. (2011b) Thermal analysis of above-grade wall assembly with low emissivity materials and furred-airspace. Building and Environment46(7): 1403–1414.
37.
SaberHHSwintonMCKalingerP. (2011c) Hygrothermal simulations of cool reflective and conventional roofs. In: 2011 NRCA international roofing symposium: emerging technologies and roof system performance, Washington, DC, 7–9 September 2011.
38.
SaberHHSwintonMCKalingerP. (2012e) Long-term hygrothermal performance of white and black roofs in North American climates. Building and Environment50: 141–154.
39.
SimmlerHBrunnerS (2005) Aging and service life of VIP in buildings. In: 7th international vacuum insulation symposium proceedings, Zurich, 28–29 September, pp. 15–22. Duebendorf: EMPA.
