Abstract

Wind-catchers have been serving as a cooling system for providing acceptable natural ventilation using the renewable energy of wind. The effects of wind velocity and mass flow rate of water spray are investigated regarding the relative humidity and temperature of a wind-catcher in a hot and dry climate. Water spray increases the relative humidity and decreases the air temperature inside the wind-catcher. With an increase in the mass flow rate of water spray, the average relative humidity and temperature of indoor-space increase and decrease, respectively. Low wind speed with the same water spray mass flow rate provides a more pleasant air condition in comparison with that of the high wind speed. Adding water spray systems to wind-catchers contribute to pleasant air condition in hot and arid regions.

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