Journal
ENERGIES
Volume 11, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/en11092228
Keywords
vacuum insulation; foam-VIP composite; numerical simulations; VIP edge effects; finite element analysis; experimental validation
Categories
Funding
- Building Technologies Office of the United States Department of Energy [DE-AC05-00OR22725]
- UT-Battelle, LLC
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A combined finite element analysis (FEA) and experimental validation approach to estimating effective edge conductivities of vacuum insulation panels (VIPs) embedded in foam-VIP composites is presented. The edge conductivities were estimated by comparing the simulation results with measurements of small-scale (0.61 x 0.61 m) foam-VIP composites and using an error minimization method. The two composites contained multiple VIPs that were butt-jointed with each other in one composite and separated by foam insulation in the other. Edge conductivities were estimated by considering the neighboring materials, i.e., whether the VIPs were adjacent to other VIPs or foam insulation. Models incorporating the edge conductivities were then used to simulate additional small- and large-scale (2.44 x 1.22 m) composites for validation and evaluation of the overall thermal transmission properties. The simulations used either the same boundary conditions as the experiments or used the experimental parameters to define the appropriate boundary conditions.
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