Extract

Wind-catchers are used to provide comfort in hot and dry climates. Many studies focused on the wind- catcher element features, such as height, type or the cross-sectional area of the wind-catcher and the studied wind-catchers were directly connected to the space. In Kashan, earth ducts are part of the wind-catcher system. But there are few researches conducted on the integration of wind-catcher with the earth ducts system and its effects on the mean indoor air temperature. Therefore, in this study, the effect of four-way wind-catcher system integrated to earth ducts on the mean temperature of the basement (Sardab) was analyzed by the CFD software. The K-epsilon method was used to solve the number. The numerical method by CFD software were compared with the results of the field method data to validate the results. After validation, it was determined that the temperature of 42°C of the incoming wind after passing through the system enters the basement with a temperature of 24°C and brings the mean temperature of the basement to 32°C. The circulation of the air from yard to basement causes hot air to replace in the basement, then passes through the other earth ducts and reduces the mean indoor temperature.

Key words: CFD; wind catcher; earth duct; hydrodynamic behavior.

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