Akademik Veri Yönetim Sistemi
Isi Bilimi Ve Teknigi Dergisi/ Journal of Thermal Science and Technology, cilt.44, sa.1, ss.245-258, 2024 (SCI-Expanded, Scopus, TRDizin)
The largest energy loss in buildings, which have a significant potential for energy efficiency, occurs in the building envelope. At present, one of the most basic approaches to reducing heat loss in the building envelope, which consists of various layers of different thicknesses and properties, is to avoid thermal bridges. Thermal bridges are areas where heat conduction is higher than other components of the building and where moisture problems are primarily encountered and are of great importance in the evaluation of building energy performance. In today's widely applied reinforced concrete frame construction system, many thermal bridges occur for various reasons. Thermal bridges occurring at the corner points of the building significantly affect the average thermal transmittance of the building. These areas are also the areas where condensation and mould formation are common. The insulation status of these regions affects the thermal and hygrothermal performance. Necessary measures should be taken by calculating the hygrothermal performance of the building envelope during the design phase. Various simulation tools are used for this purpose. In this way, the building envelope can provide energy, comfort, and health conditions during the design phase. In this study, heat losses and hygrothermal performance of thermal bridges are investigated. The thermal bridges occurring at the corner point of an existing residential building were evaluated according to the conditions of uninsulated, partially insulated and externally insulated. Analyses within the scope of the study were carried out with Quick Field 6.3 and Wufi 2D-4.3 programs. In the analyses, it is seen that 37% more heat loss occurs in the case of partial insulation of thermal bridges than in the case of continuous external insulation. Likewise, in terms of hygrothermal performance, there is no condensation risk in the case of continuous external insulation.