Abstract
A double-skin facade makes it possible to gain irradiance through the glass on the outer side in summer, and to increase the temperature of air flowing in the cavity so as to induce the flow of air current. Therefore, a double-skin facade is able to reduce the load of the outer skin, which is delivered from the outside to the inside in summer, and to serve as a buffer space for the internal and external environments in winter, and thereby prevent heat loss from the building envelope. Theoretical analysis was conducted to review the heat effects of a double-skin facade and to evaluate the performance of a plan for indoor load reduction. This study carried out a field measurement of a building with a double-skin facade and then analyzed the thermal phenomenon occurring in between the outer skin of the outside and the skin of the inside facing the building surface, according to the effects of irradiance going into the double-skin facade cavity. In order to propose an indoor air conditioning energy reduction plan using preheated air through the double-skin facade, this study utilized a building simulation to be implemented on the target building and then analyzed the effects of the improvement plan for the double-skin facade. A simulation model was suggested that implemented the aforementioned airflow network and analyzed the ventilation performance and energy performance according to the application of alternative plans and thermal effect. To find the actual state of operation of the double-skin facade in winter, this study measured the target building. A solar chimney-based double-skin facade was analyzed in winter. As a result, with the application of a solar chimney and a rise in its height, the available capacity of relatively larger solar heat increased, and therefore the proposed plan had excellent performance in terms of heating energy saving. When the thermal effect was applied to the solar chimney, the heating energy use effect of the solar irradiance of the double-skin facade was larger. When thermal effect was applied to a three-floor solar chimney, the heating energy use increased to about 7.6 times higher than that of the original performance of the double-skin facade.
Highlights
In order to save heating energy in a building in winter, passive techniques for enhancing building insulation can be applied
In the case of double-skin facades, the SHGC of the total system, which includes the outer skin of the internal side along with the transparent outer skin with solar heat transmittance, is a main indication needed to judge the optical performance of the building envelope, just as the window and door with a general outer skin of transmittance
In order to find the effects of double-skin facades in winter, Lei Xu et al utilized the double-skin facade of a two-floor residential building and analyzed the cooling effect through ventilation in summer, the greenhouse effect in winter, and the internal environment through the natural air conditioning effect and energy saving in the intermediate period [6]
Summary
In order to save heating energy in a building in winter, passive techniques for enhancing building insulation can be applied. These researchers analyzed the performance of the ventilation of the double-skin facade in the daytime and nighttime according to installation direction, wind direction, and wind velocity They evaluated applicability differently depending on what type of double-skin facade was selected out of eight different types, and thereby drew the optimal design plan of the double-skin facade to be installed in the south side and compared the cooling and heating energy consumption. As a result, they suggested the possibility of inefficient operation, which means that if the natural ventilation of the double-skin facade cavity during a cooling period is not active, the application effect can be lowered.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
