| Title |
Comparison of Insulation Performance between Single Panel and Sandwich Panel Exterior Walls in Precast Concrete Apartment Buildings with Load-bearing Wall Structures and Frame Structures |
| Authors |
주나영(Joo, Na-Young) ; 송승영(Song, Seung-Yeong) |
| DOI |
https://doi.org/10.5659/JAIK.2025.41.3.281 |
| Keywords |
Precast Concret; Sandwich Panel; Apartment; Insulation; Thermal Bridge |
| Abstract |
The purpose of this study was to compare and evaluate the insulation performance of the precast concrete sandwich panels and single panels
at the exterior wall-floor joints of PC apartment buildings. The energy performance and the risk of condensation were asssessed by applying
single panels and sandwich panels to load-bearing wall structures and frame wall structures, respectively. For this purpose, a three-dimensional
steady-state heat transfer simulation was conducted. The results showed that for the load-bearing wall structure, the effective U-factor of the
exterior wall decreased by 33.2 % when the sandwich panel was applied, demonstrating a significant improvement in energy performance.
Conversely, for the frame structure, the effective U-factor of the exterior wall increased by 47.7 % when the sandwich panel was applied,
indicating that it was not effective in enhancing energy performance. Furthermore, in all cases, The effective U-factor was higher than the
design U-factor, suggesting significant heat loss due to thermal bridges at the exterior wall-floor joint. |