The Effect of Wind catcher Geometry on the Indoor Thermal Behavior
Authors: Ghadiri, M. Hossein ; Ibrahim, N. Lukman N.; Aayani, R.
The wide spread use of air conditioning to meet the high load of cooling for buildings in hot – arid climate regions has become a real problem. Since these systems have a high impact on the peak electricity load, and cause environmental problem associated with ozone depletion, global warming, urban heat island and deterioration of the indoor air quality. Recently, as means to reduce energy consumption of air conditioning systems, wind towers have been used as an alternative solution to meet summer thermal cooling. The ventilation structures called “Badgirs” or wind towers were the most important means by which the interior was cooled in Iranian desert region. These wind towers or wind catchers can be found in Iranian cities with hot-dry and hot-humid climates. This paper is a synopsis of the results of a research on the wind catcher element in the traditional architecture of Iran. A review of the wind towers’ characteristics with emphasis on their morphology is provided and categorization of the wind towers based on their physical attributes and parameters are thus proposed. This paper also presents a limited thermal simulation results which shows the influence of different wind catcher’s plan geometry on the indoor air temperature. The simulations carried out using a 3-D computational fluid dynamics (CFD) software called FLUENT, demonstrate the effect of two different square wind catchers on the indoor thermal performance.