Investigating the effect of protrusion and orientation of the building on self-shading of the building in hot and humid climate (Case study: four-story buildings on Kish Island)

Shading and using shade to cool the building has long been considered by humans, and self-shading of buildings in hot climates is a good solution for passive cooling; In this regard, the shape of the building bodies is an important factor in creating shadow on the body. On the other hand, the angle of orientation and placement of the building is another very effective item that can affect the amount of self-shading and, consequently, the amount of energy received. This article intends to study the self-shading in different angles of the building orientation and the desired amount of protrusion of the floors in the facade to obtain the maximum amount of shading. The studied city and climate is Kish city in the hot and humid climate of Iran. The research method in this research is descriptive-analytical, in which simulation has been done with the help of Ecotect software. According to the findings, while changing the degree of protrusion of the floors causes a significant change in the amount of self-shading, the orientation towards the east and west and also the difference in positioning angle does not cause a significant change in the average annual amount of shaded areas. Still, in both cases, the amount of radiant energy received changes significantly. The results show that the four-story building with the protrusion of the floors by 0.3 meters relative to each other, with an angle of 30 degrees to the west, is considered the optimal model in terms of passive cooling.