Architectural Design of Passive Energy Systems, with Emphasis on Eaves

This paper proposes a new method for ventilation and cooling enhancement through parts of envelope lines. Risen hot air is an important potential to increase radiant heating of spaces in summers and chimney effect which is a common method for its removing. However, air-leaking into spaces and exclusion of hot air are minimized in some regions due to unfavorable prevailing winds and high relative humidity. Thus, it is useful to design a passive energy system to ventilate and cool spaces without any inward air leaking. This is an applied research conducted analytically to design a passive energy system with cooling and ventilation functions and radiant cooling of different parts of envelop lines while emphasizing on eaves and sun shades. The system was designed considering climatic potential of northern Arasbaran (Iran) where there are dense vegetation and kinds of prevailing winds. The proposed system provides radiant cooling and ventilation using renewable energy sources, e.g. wind, risen hot air, vegetation, and parts of envelop lines relying on environmental specifications and some simple equipment.