ABSTRACT
Design of passive solar architecture is more complex than that of a traditional modern building. The sun's path in relation to the site is dynamic. Air-flow in relation to the site is irregular and at times turbulent. The interior temperature is chaotic within limits of the comfort zone which is determined as much by culture and social mores as scientific measurement. Besides site selection, wind protection may be provided by adjacent buildings, walls or vegetation. Solid windbreaks produce strong eddy currents which negate much of their effectiveness. Air patterns in a room are largely determined by the inlet location and its relationship to the exterior surfaces of the building. Outlet size in relation to inlet size largely determines the speed of interior airflow. Change in direction causes greater spread but less speed. Despite the fact that the simulation programs are continually getting more accurate and easy to use, the current programs can hardly be said to be mature.
