Abstract

<p>Vacuum Insulation Panels (VIPs) are a kind of the super-insulated materials (SIMs). VIPs are innovative material in various fields like the building sector as it encompasses a higher thermal resistance per unit of thickness compared to conventional insulation. To extensively use VIPs in the building sector, comprehensive performance analysis, and their properties such as thermal conductivity valuations are required to be done under simulated conditions to evaluate its longterm performance. However, different VIPs have varying durability, and as it stands, there is no comprehensive understanding of how all VIPs will behave in real conditions. This research investigates the effect of multiple variables (such as temperature, relative humidity) on VIP service life. The purpose of this research is to validate the theoretical ageing model of VIPs. First, the experimental thermal conductivity results from seven samples of three different VIP categories are collected using a heat flow meter. To measure the accelerated ageing results over 25 years, Arrhenius equation is applied. Next, NRC theoretical model is used to predict the ageing response of the samples. Finally, an analytical method is employed to verify and validate this model based on the collected data. Results shows that effect of ageing and environmental temperature have higher impacts on the performance of fibreglass panels than the fumed silicas. Additionally, the aging effects analysis reveals that microporous silica VIP products would maintain their superior thermal performance over time. Keywords: Vacuum insulation panel, Ageing, Thermal conductivity, accelerated ageing, modelling</p>

Highlights

  • Energy consumption of residential sectors of Canada accounts for 17% of secondary energy use and this sector emits 13.6% of total GHG to the environment (Natural Resources Canada 2014)

  • - Increase of thermal conductivity over time - Fumed Silica (FS) Vacuum Insulation Panels (VIPs) will be partially aged at 80% RH - The surface hydrophilicity of core aged VIPs is 2 times higher than the new one

  • Different combinations of climatic strains occur in real condition, it was observed that the permeability of the envelope is zero

Read more

Summary

Introduction

Energy consumption of residential sectors of Canada accounts for 17% of secondary energy use and this sector emits 13.6% of total GHG to the environment (Natural Resources Canada 2014). Usage of vacuum insulation was proposed by James Dewar more than a hundred years ago, when he used glass and metal to make a vacuum flask (Winsniak, 2003). This vacuum flask could control the compression force generated by the pressure difference between flask walls and the outside environment. In this setup, radiation is the only possible way for heat to transfer between the layers of metal and glass, and heat loss resultant of this is a negligible amount at room temperature. VIP usage provides a solution where not much space is available for insulation but high thermal resistance is desired (Karami et al, 2015)

Objectives
Results
Discussion
Conclusion

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.