| Title |
Insulation Performances of the Typical Floor's Front Wall-slab and Side Wall-slab Joints of Apartment Buildings with Internal and External Insulation Systems |
| Authors |
Song Seung-Yeong ; Koo Bo-Kyoung ; Ch i Bo-Hye |
| Keywords |
Thermal Insulation ; Thermal Bridge ; Energy ; Apartment Building ; External Insulation System ; Internal Insulation System |
| Abstract |
Apartment building is the most common type of residential building in Korea and hot water pipes for heating are installed on the slab. IIS (Internal Insulation System) is typically applied to most Korean apartment buildings, so there are many cases in which the layer of insulation is disconnected by structural components at the joints of wall-slab and wall-wall in envelope. These joints become thermal bridges at which the risks of inside surface condensation and heat loss increase. Especially at the joints adjacent to hot water pipes for heating, the amount of heat loss is remarkable. It is expected that EIS (External Insulation System) is the solution to this problem. In this paper, the present conditions of EISs on the market were surveyed. Surface temperature images of apartment buildings with IIS and EIS were taken with infrared thermal imaging camera at dawn in the winter. Front wall-slab joint and side wall-slab joint of apartment building recently completed were selected as typical thermal bridges. Annual heat loss through each joint in both cases of applying IIS and EIS was evaluated by the three-dimensional transient heat transfer simulation. As results, it was found that the application of EIS to the front wall-slab joint could decrease not only the amount of insulation by 47.4% but also the annual heat loss by 4.2%. In the case of the side wall-slab joint with EIS, 29.7% decrease of annual heat loss was accomplished by no more than 4.9% increase of the amount of insulation. |