Theoretical prediction and aging experimental verification of the service life of vacuum insulation panels

• Published in: Cleaner Engineering and Technology Vol. 8; p. 100484
• Main Authors: Kan, Ankang, Zheng, Ni, Wu, Yu, Wang, Wei, Zhang, Xuexiang, Cai, Haofeng, Cao, Dan
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2022; Elsevier
• Subjects: Aging experiment; Service life; Theoretical prediction mode; Thermal conductivity; Vacuum insulation panels; Service life; Thermal conductivity; Theoretical prediction mode; Aging experiment; Vacuum insulation panels
• ISSN: 2666-7908; 2666-7908
• DOI: 10.1016/j.clet.2022.100484

Vacuum insulated panels (VIPs) are a new type of high-efficiency insulation material with the advantages of energy saving and environmental protection, especially carbon neutral. The excellent thermal performance makes it shine in the carbon reduction market. In the construction field, the service life is an important issue in the application of VIPs. This study uses experimental methods and theoretical mathematical models based on current research to investigate the effects of accelerated aging tests of temperature, humidity, size and alternating high and low temperatures on the service life and thermal conductivity of VIPs. The objective is to validate the existing theoretical aging model of VIPs. First, the experimental setup and protocol are described. Then, the work reports the experimental results of thermal conductivity of 12 VIPs under pristine and accelerated laboratory conditions. The results show that the thermal conductivity of VIPs is low when the humidity is 30%RH to 50%RH, and high when the temperature is 97 °C. The larger the size, the smaller the thermal conductivity. And the thicker the thickness, the greater the thermal conductivity. The thermal conductivity of the insulation panel is very sensitive. This work investigates the service life of vacuum insulation panels under different harsh conditions and contributes to the promotion of vacuum insulation panels in the Chinese construction market. [Display omitted] •Thermal conductivity of vacuum insulation panels is measured using the hot plate protection method.•The effects of temperature, humidity, high and low-temperature alternations, and size on the thermal conductivity are illustrated.•Comparison of the measured values with the calculated values validates the existing aging model.•Estimating the service life of vacuum insulation panels.