Abstract
this study, characteristics of the surface temperature and condensation on a window were assessed, using vacuum insulated glass units produced by the in-vacuum chamber method. For this purpose, mock-up test was performed, based on the result of preliminary study about the test methods of the surface condensation resistance performance of a window system. A general double glass window(DG Window) was selected as an alternative for comparison. As a result, in the same location, the surface temperature of the vacuum insulated glass window(VIG Window) was $4{\sim}6^{\circ}C$ higher, in comparison with a general DG window. The surface temperature on the center of glass in the VIG window was higher than that on the frame, because of the thermal performance of the vacuum insulated glass(VIG). On the other hand, the surface temperature on the edge of glass in the VIG window was still lower ($0.9{\sim}1.5^{\circ}C$), than that on the frame. Therefore, for improvement of the surface temperature distribution in a VIG window, a strategy to reduce heat loss in the glass-intersection, as well as the application of a frame with equal or greater thermal performance, in comparison with the vacuum insulated glass, are required. Under the condition of room air temperature $20^{\circ}C$ and relative humidity of 50%, the calculated outdoor air temperature was $-21.2^{\circ}C$, when indoor surface condensation on the VIG window begins to occur. Analyzing based on the standard weather data for Seoul, it was expected that surface condensation on the VIG window would not occur.
