DESIGN STUDIO 4
Abstract Natural ventilation is the process of supplying and removing air through a space by natural means it can be achieved with openable windows or vents. Natural ventilation and air movement can be simply achevied by ‘structural controls’ as it does not depends on any form of external energy supply or mechanical installation. there are three achieve different technologies for natural ventilation. There are three types of natural ventilation effect : stack effect, wind tower and courtyard effect. The stack effect is the movement of air caused by thermal differences. The density of high temperature air is lower than that of low temperature air. As the warm air rises, it will create a pressure difference, below which the pressure will decrease, and above this pressure will increase the pressure. In buildings in winter, lower pressure allows colder air to enter the ground from the outside. The temperature of the cold air starts to rise and continues to circulate. In summer or warmer climates, the chimney effect reverses. Hot air from outside enters the upper part of the cooler building and generates ventilation. Wind tower is a key element of traditional iranian architecture. It can be seen in settlements in hot, dry and hot climates. They look like chimneys in the skyline of ancient iranian cities. They are vertical shafts with ventilation holes on the top to guide the required wind to the interior space and provide thermal comfort. This architectural element shows the compatibility of the architectural design with the natural environment. It saves energy and functions according to the principles of sustainability. Courtyard effect is due to the solar radiation in the yard, the air is warming and the wind is surging. The ground air radiates to the sky landscape or water body through low-altitude radiation from the lower opening, indicating that the courtyard radiation produces a cooling effect.
Research by Lam Qin Jun
NATURAL VENTILATION 54
