How Double Skin Façade’s Air-Gap Sizes Effect on Lowering Solar Heat Gain in Tropical Climate?

The most pleasant architectures are known as systems which are able to maintain great correlation with nature. These systems make the best out of natural potentials to maintain thermal comfort for buildings occupants. To that aim, the first step is to manage the effect of outside weather condition on building’s envelope. DSF is known as architects’ solution to control incoming wind speed, manage the amounts of solar heat gains and reduce noise pollution in noisy city area. DSF is able to decrease cooling loads by ventilating away the solar heat built up in the cavity. However previous researchers have suggested that the risk of overheating within (DSF) envelope is high in tropical climate. This paper would aim to evaluate the effect of DSF’s air-gap size on the amount of solar heat transferred through the façade envelope. CFD tool is applied to simulate 6 different strategies. While during each strategy 60 monitor point record accurate temperature data; the results of the simulations determines rooms' temperature for each strategy. In addition analyzing the result determines that DSF air-gap size is an important factor in order to reduce solar heat gains and reduction up to 3° centigrade is possible by well designed air-gap size.