Paper Conference

Proceedings of ASim Conference 2016: 3rd Asia conference of IBPSA-China, Japan, Korea

     

THE EFFECT OF EXTERIOR SHADING DESIGN ON VISUAL COMFORT AND ENERGY USE PATTERNS IN A BUILDING PERIMETER ZONE

J. Oh, H. Kim, S. Kim

Abstract: Daylighting is one of the most important factors to take into consideration during the schematic design stage, especially in modern office buildings. Introducing daylight with the proper quality and quantity can contribute to reducing the annual energy use as well as improving visual comfort. Moreover, because a comfortable visual environment could improve the workability of employees, building envelop (window and shading devices) design is very important for office buildings. Shading devices used in buildings usually have a large transparent area for several reasons: keep out the heat of the sun, block uncomfortable glare from direct sunlight and soften harsh daylight contrast. However, inappropriate shading devices might have the opposite effect, as well as cause visual discomfort, to what was intended: the increase in the heating and lighting energy consumption exceeds the decrease in the cooling energy use. For helping initiative understand both energy and comfort, the aim of this paper is to introduce the concept of the Facade Perimeter Distance (FPD) with excessive daylight illuminance levels and building energy use patterns according to the Projection Factor (PF) of shading. In this study, two exterior fixed shading types, a horizontal overhang and a vertical fin, were evaluated with various PFs, respectively. The FPD and heating, cooling, lighting and total energy use patterns were compared by shading types and window orientations.
Keywords: Shading devices, Visual comfort, Energy consumption, Building perimeter zone
Paper:
asim2016_326