Journal of Korean Institute of Architectural Sustainable Environment and Building Systems ISSN:1976-6483(Print) 2586-0666(Online) 한국건축친환경설비학회논문집

The purpose of this paper is to study an energy analysis method considering linear thermal bridges of wall-slab joints in residential buildings with radiant floor heating system. In order to analyze linear thermal transmittances of wall-slab joints with radiant floor heating system, quantity of heat transfer through the wall simulated by Physibel Trisco and the equation “Calculation of linear and point thermal transmittances” obtained by ISO 10211 were used. The experiment was conducted at the side walls and expanded balcony front walls of internally insulation system and externally insulation system with 50°C, 60°C, and 70°C heating (Hot water temperature). As a comparable, linear thermal transmittances of structures without radiant floor heating system were calculated. An evaluation standard is used with linear thermal transmittances obtained by ISO 14683. However, default values of none-expanded balcony front walls were used at expanded balcony front walls because there is no default values of expanded balcony walls on ISO 14683. The results of this study are as follows; the data calculated by this study at the side walls with radiant floor heating system were 15% to 38% higher than none-heating system. The data calculated by this study at the expanded balcony front walls with radiant floor heating system were 6% to 12% higher than none-heating system. Since this research covered only linear thermal transmittances at steady states without weather data through the simulation software, further studies with linear thermal transmittances at dynamic states with weather data and actual measures are to be considered.