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Minimize thermal edge losses with stainless steel envelopes for Vacuum Insulation Panels (VIPs)

: Feinerman, A.D.; Gupta, P.; Foster, C.; Yarbrough, D.W.; Kosny, J.

Laudon, M. ; Nano Science and Technology Institute -NSTI-:
NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2013. Technical proceedings. Vol.3: Nanotechnology 2013: Bio sensors, instruments, medical, environment and energy : An interdisciplinary integrative forum on nanotechnology, microtechnology, biotechnology and cleantechnology, May 12 - 16, 2013, Washington, D.C., U.S.A.; NSTI Nanotech 2013 joint meeting; the 16th Annual NSTI Nanotechnology Conference and Expo is part of the TechConnect World Annual Summit & Innovation Showcase / NSTI Nanotech 2013 proceedings
Boca Raton, Fla.: CRC Press, 2013
ISBN: 978-1-4822-0586-2
ISBN: 1-4822-0579-3
ISBN: 978-1-4822-0579-4 (Set)
ISBN: 978-1-4822-0604-3 (Set DVD)
Nanotechnology Conference and Expo <16, 2013, Washington/DC>
TechConnect World Annual Summit & Innovation Showcase <2013, Washington/DC>
Fraunhofer IESE ()

Vacuum Insulation Panels (VIPs) traditionally maintain a reduced pressure in their interior by surrounding a core with an inexpensive laminate of a polymer film with a 7.6 urn thick aluminum film, or a more expensive polymer film coated with ~0.3 m thick aluminum film. In either case the VIP is too fragile to be attached directly to a building's envelope without utilizing a mechanical superstructure, and thermal edge losses of the superstructure can dramatically reduce the high R value offered by a VIP. We show that commercially available 51 n thick stainless steel foil has the strength to be attached directly to a building's envelope without a superstructure, is relatively impermeable, and has edge losses between that of an inexpensive laminate and the coated film. We use a finite difference method to estimate how low the edge losses can be reduced. The economic justification for this reduction diminishes after achieving ~85% of the maximum R value for an infinite pane l that would not have any edge losses.