| Title |
Insulation Performance Comparison of Apartment Building Envelopes Composed of Reinforced Concrete and Precast Concrete |
| Authors |
주나영(Joo, Na-Young) ; 송승영(Song, Seung-Yeong) |
| DOI |
https://doi.org/10.5659/JAIK.2021.37.12.265 |
| Keywords |
Precast concrete; Apartment; Insulation; Energy; Condensation |
| Abstract |
The aim of this study is to evaluate the actual insulation performance of the apartment building PC (precast concrete) envelope to which
steel tying materials are additionally installed between structures and hollow-core slabs are applied. Through three-dimensional steady-state
heat transfer simulation, the energy performance and condensation risk of each envelope composed of RC (reinforced concrete) and PC
having the same legal U-factor and insulation method were compared and analyzed. As results, it was found that the effective U-factor and
temperature difference ratio of the RC and PC envelopes were very similar, indicating that the energy performance and condensation risk
were almost the same. The effective U-factor of both the RC and PC envelopes was about 30 to 90% higher than the legal U-factor,
indicating a large heat loss due to thermal bridges. Therefore, in order to improve energy performance, it is necessary to remove thermal
bridges in both the RC and PC envelopes. |