Thermal behavior of a double skin facade with smart electro-chromic glasses and its effects on the energy consumption of a high-rise building in Tehran climate

One of the most effective methods for reducing the energy consumption of high-rise buildings, besides using appropriate building aspect ratios, is employing double skin facades. Double skin facades always show desirable performance in cold seasons, however, in hot seasons, their performance strongly depends on the facade components design and the climate of the building location. In hot climates, using double skin facades might increase the energy consumption of the building. In order to solve this issue, the researchers suggested using smart glasses. In this paper, the performance of a double skin façade with smart electro-chromic glasses was investigated in terms of the monthly and annual energy consumption in Tehran climate. Results showed the superior performance of the selected double skin façade with electro-chromic glasses, with respect to the regular single and double skin facades. It was also found that employing double skin facades with electro-chromic glasses would result in a 25% reduction of the building energy consumption in cold months and a 26% reduction in hot months, which have significant effects on the annual energy consumption of the building.