| Title |
Experimental Study of the Relationship between Weight Variation and Thermal Conductivity in Polyurethane Foam |
| DOI |
http://dx.doi.org/10.6110/KJACR.2015.27.5.241 |
| Keywords |
독립셀 ; 우레탄폼 ; 에이징 ; 열전도도 ; 유효확산계수 Closed-cell ; Polyurethane Foam ; Ageing ; Thermal Conductivity ; Effective Diffusion Coefficient |
| Abstract |
Cellular foamed insulation such as polyurethane foam ages and degrades the thermal conductivity. Aging of foam is a result from the diffusion of gases, initially consisting of CO2 but eventually replaced by air from the environment. The variation of the cell gas content with time is primarily influenced by the increase of thermal conductivity of the cellular foam. The weight of foam also changes as the gas diffuses and exchanges. In this study, a weight measurement method has been proposed to evaluate the effective diffusion coefficients of CO2 and Air, DCO2 = 7.08504E-11 and Dair = 4.86086E-12, respectively and are compared with the gas analysis method. |