Dynamic facade potential for indoor lighting uniformity

Abstract

Abstract The facade is an important part of a building. Its existence affects the comfort of the users. the situation outside the building is often unfavorable for the users, so the facade must be reliable as a protective element. the tropical climate receives an abundance of sunlight throughout the year. its rays can be used for natural lighting. But the rays also carry heat, which makes it uncomfortable. the entry of sunlight can be controlled. one possibility is to make the facade elements move following the sun’s movement. The aim of this research is to compare the performance of static and dynamic facades in terms of the uniformity of light entering the room. The value of lighting uniformity in condition 1 has a relatively small. This is due to the high intensity of light entering the room without obstruction resulting in high contrast Condition 2 uses a static facade. The value obtained is higher in comparison with condition 1. This is due to the presence of a shade that makes the light contrast not occur too large. Condition 3 uses a shade that rotates with the sun movement every hour. The comparison value tends to decrease but, when viewed, the value of the decrease is not as fast as condition 2. Judging from the three facade conditions, condition 3, namely the dynamic facade, has the smallest decrease in lighting uniformity. This demonstrated that the longest lighting uniformity occurs in condition 3