The role of the double-skin facades system to achieve thermal comfort in hot areas

The treatment with double-skin facades has recently been observed, and there is a conflict of opinion when choosing the depth of the air cavity between the two layers of skin of the facades, which ranges from 0.20 m: 2.00 m, resulting in interfaces that do not meet the needs of the users (thermal comfort, natural light, and air flow). The paper aims to determine the best suitable air cavity depth for buildings in hot areas, by following the experimental inductive method and analytical descriptive method. Process simulation on a scaled model in the laboratory is performed to determine the appropriate depth of the cavity that reduces air temperature of the internal spaces, and the proper air speed that achieves thermal comfort. It is concluded that there is an inverse relationship between the air speed and the depth of the air cavity. © 2020, Cairo University. All rights reserved.