Vacuum Insulation Panel: Evaluation of Declared Thermal Conductivity Value and Implications for Building Energy

Policymakers regularly implement stricter building energy-efficiency codes towards curtailing energy use. Inevitably, super-insulating materials such as Vacuum Insulation Panels (VIPs) are essential to satisfy codes. VIPs have been applied buildings for over two decades now, with many lessons learned. Generally, the thermal conductivity values of often reported in literature center-of-panel (λcop) and effective (λeff), factoring bridges. However, there other indexes, λ90/90 (declared value 90% percentile a confidence 90%) λcop,90/90,aged (factoring aging), that increase consistently reliably declared VIPs. These indexes scarcely computed hardly reported. The main aim this study was examine different VIP-based guidelines, draft ISO DIS 16478, evaluate their implications on annual consumption. constitutes four parts: (1) experimental evaluation properties pristine aged VIP samples, (2) computation (3) numerical investigation based reference building, (4) related implications. mean λcop 10 samples 0.0042 W/(mK) increased 0.0073 λ90/90, bridge, aged. Results show significant bearing performance much 2.1 GJ.