Journal of Korean Institute of Architectural Sustainable Environment and Building Systems ISSN:1976-6483(Print) 2586-0666(Online) 한국건축친환경설비학회논문집

Recently to reduce energy consumption in the building sector, insulation regulation of the building envelope has been strengthened more and more. The strengthened regulation on insulation results in thicker building envelope and the thicker envelope makes inner space become narrow. One of the solutions to meet strengthened insulation regulation is using high efficient insulation for the building envelope. Vacuum Insulation Panel (VIP) is one of high efficient insulation which has 8~10 time lower thermal conductivity than existing insulations. By installing VIPs for building insulation, meeting the strict insulation regulation and maintaining large inner space are both possible. Generally, the lifetime of buildings is more than 50 years. However, the study on the long-term performance of VIPs is insufficient. In this paper, the performance and durability of VIPs were investigated. For the performance evaluation, VIPs from 5 companies were investigated. 4 types of VIPs based on fumed silica and 2 types of VIPs based on the glass fiber were tested. To analyze the performance of VIPs the thermal conductivity and inner pressure of VIPs were measured. For the analysis of the long-term performance for VIP, the accelerated aged test based on ISO standard was conducted. The accelerated test was done for 180 days and the test condition was kept at temperature of 50℃ and relative humidity of 70%. This paper compared the performance of VIP depending on the core material. Also, it showed the performance changed according to time and the estimated long-term performance of VIPs based on the accelerated aging test result was discussed. This paper would be a foundational research to help apply VIPs for the building industry.