| Title |
Analysis of Annual Heating Load Reduction Effect for Thermal Bridge-free Externally Insulated Apartment Buildings Using the Steady-state Method |
| Authors |
Song Seung-Yeong ; Koo Bo-Kyoung ; Lee Beung-In |
| Keywords |
Thermal Bridge ; Linear Thermal Transmittance ; EIFS(External Insulation and Finish System) ; Heating Load |
| Abstract |
The IIS(Internal Insulation System) is typically applied in most Korean apartment buildings which are the most common type of residential buildings. Consequently, there are many cases in which the layer of insulation is disconnected by the structural components at the wall-slab and wall-wall joints in the envelope. These joints become thermal bridges where the risk of heat loss increases. In particular, the amount of heat loss is significant at the wall-slab joints adjacent to hot water heating pipes. It is expected that the EIFS(External Insulation and Finish System) is the solution to this problem. In this study, annual heating loads of apartment buildings with IIS and EIFS were compared using the steady-state method. Heat losses through thermal bridges are included for the apartment building's annual heating load calculation by the linear thermal transmittances. As results, the EIFS could improve linear thermal transmittances by 65.1∼86.4% compared to the IIS. In addition, apartment building with EIFS showed the 8.5% less annual heating load. |