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Technical Brief

In Situ Experimental Validation of therm Finite Element Analysis for a High R-Value Wall Using Vacuum Insulation Panels

[+] Author and Article Information
Matthew J. Schiedel

Building Knowledge Canada Inc.,
240 Holiday Inn Drive,
Cambridge, ON N3C 3X1 Canada
e-mail: matt@buildingknowledge.ca

Cynthia A. Cruickshank

Mechanical and Aerospace Engineering,
Carleton University,
1125 Colonel By Drive,
Ottawa, ON K1S 5B6 Canada
e-mail: Cynthia.Cruickshank@carleton.ca

Christopher M. Baldwin

Mechanical and Aerospace Engineering,
Carleton University,
1125 Colonel By Drive,
Ottawa, ON K1S 5B6 Canada
e-mail: Christopher.Baldwin@carleton.ca

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING: INCLUDING WIND ENERGY AND BUILDING ENERGY CONSERVATION. Manuscript received December 11, 2013; final manuscript received June 28, 2015; published online September 22, 2015. Assoc. Editor: Jorge E. Gonzalez.

J. Sol. Energy Eng 137(6), 064503 (Sep 22, 2015) (5 pages) Paper No: SOL-13-1368; doi: 10.1115/1.4031512 History: Received December 11, 2013; Revised June 28, 2015

This paper details the method used for a theoretical evaluation of Team Ontario's, U.S. Department of Energy Solar Decathlon 2013 entrant, high R-value wall using vacuum insulation panels (VIPs). The purpose is to determine a theoretical whole-wall thermal resistance to be used for energy modeling. Theoretical simulations are performed in therm, a two-dimensional finite element heat transfer modeling program, and an in situ experimental validation is conducted in Carleton University's Vacuum Insulation Test Facility located in Ottawa, Ontario, Canada. The theoretical model is refined based on the experimental study, and a whole-wall thermal resistance of Team Ontario's wall design is determined to be 9.4 m2·K/W (53 h·ft2·°F/Btu) at an exterior design temperature of −18 °C (0 °F).

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References

Mukhopadhyaya, P. , MacLean, D. , Korn, J. , van Reenen, D. , and Melleti, S. , 2014, “ Building Applications and Thermal Performance of Vacuum Insulation Panels (VIPs) in Canadian Subarctic Climate,” Energy Build., 85, pp. 672–680. [CrossRef]
BASF, 2012, “ EPS Test Results per ASTM C578,” BASF Corp., Ludwigshafen, Germany, accessed Jan. 21 2013, http://www.neopor.basf.us/about/certone
BASF, 2011, “ Technical Product Data: WALLTITE Eco v.3 Spray Polyurethane Foam Insulation/Air Barrier Material,” BASF Canada, Mississauga, ON, Canada.
Straube, J. , and Smegal, J. , 2011, “ Building America Special Research Project: High-R Walls Case Study Analysis,” Building Science Corp., Sommerville, MA, Research Report No. 0903.
ASTM, 2007, “ Standard Practice for Determining Thermal Resistance of Building Envelope Components From the In-Situ Data,” ASTM International, West Conshohocken, PA, Standard No. ASTM–C1155.
Flanders, S. , Desjarlais, A. , and Kunz, T. , 1995, “ A Comparison of Two Techniques for R-Value Calculation, Using Winter In-Situ Data,” ASHRAE/DOE/BETEC Thermal Performance of the Exterior Envelopes of Buildings VI, Clearwater Beach, FL, Dec. 4–8, pp. 151–161.

Figures

Grahic Jump Location
Fig. 2

therm model of roof-to-wall connection at a stud and joist cavity

Grahic Jump Location
Fig. 3

therm model of floor-to-wall connection at a stud and joist cavity

Grahic Jump Location
Fig. 4

Thermocouple and heat flux readings

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