OFFICE DESIGN WITH NATURAL LIGHTING OPTIMIZATION USING FIXED ELEMENT SHADING AND ADAPTIVE SHADING

• Main Author: Rahma Apriliyanthi, Sri
• Format: Theses
• Language: Indonesia
• Subjects: Arsitektur
• Online Access: https://digilib.itb.ac.id/gdl/view/45653
• Institution: Institut Teknologi Bandung

In designing office buildings there are several considerations that are very important to think about, one of them is the comfort and health of office employees who act as building users. These office employees are the most valuable asset of a company, even up to 90-91% of the company's life-cycle cost is used to pay them. For that reason, the factors that support the increase in productivity and comfort of these employees become very important to be considered by architects. Another factor that is considered by a company to choose an office for its employees is the prestigious value of the office building, such as green building certification and unique features that exist in the building. Some standards for green building certification have also been set by considering energy use, health and comfort for building users, including the Leadership in Energy and Environmental Design (LEED) conducted by the US Green Building Council (USGBC). The governing agency related to green building standards in Indonesia has also been available since 2009, namely the Green Building Council Indonesia (GBCI) with its GREENSHIP certification. Several studies have found that one of the factors that affect productivity and comfort of office employees include the availability of natural lighting in the room and access to views through windows. In this thesis specifically discusses the horizontal louvre performance to optimize natural lighting that enters the building. The performance of natural lighting will be assessed using the standard of natural lighting in LEED, namely Spatial Daylight Autonomy (sDA) of a minimum of 55% and a maximum Annual Sunlight Exposure (ASE) of 20%. The case to be discussed in this design is the second tower of the Gran Rubina Business Park with a building height of 35 floors. Natural lighting simulation in the workspace is done by taking four floors as a sample, with a distance between the simulation floors which is 10 floors. Therefore the simulated floors are 5, 15, 25 and 35. The simulated workspaces are also separated into four zones based on their orientation, North, East, South and West. Thus the influence of building orientation and height on sDA and ASE can be seen. Horizontal louvre was designed with the help of software that supports computer aided design (CAD), in this thesis mainly use Rhinoceros and Grasshopper. The aim to use this software is to get more accurate calculation results of simulation of natural lighting performance compared to calculations and simulations performed manually. This simulation is carried out in a workspace with an open plan to determine the characteristics of horizontal shading used in the design. The characteristics of the shades studied in this thesis are fixed elements shading and adaptive shading. The fixed characteristic examined in this thesis is the dimension of the depth of the shade blades which will be related to the height of the opening and the number of blades, and the type of glazing material used. For the adaptive characteristics studied in this thesis is the angle that responds to the illumination in the room. The simulation shows that the sDA value will be affected by changes in height and orientation of the openings, while ASE will only be affected by the orientation of the building. The simulation results also show a good performance from the horizontal louvre to achieve the sDA and ASE standards on the North and South side openings, but the performance for the West and East sides is not suffice to satisfy the standards, so an adaptive shading system to improve its performance is needed. The adaptive characteristics used are the blades that adjust their angles for certain illumination conditions in room.