SENSITIVITY STUDY OF OVERALL THERMAL TRANSFER VALUE AND BUILDING PERFORMANCE BASED ON HIGH-RISE OFFICE FACADE DESIGN VARIABLES

• Main Author: D Krisna Adya Anindita, M
• Format: Theses
• Language: Indonesia
• Subjects: Utilitas
• Online Access: https://digilib.itb.ac.id/gdl/view/84315
• Institution: Institut Teknologi Bandung

Building sector is one of the targets for the implementation of energy conservation and efficiency programs by the Indonesian Government. Office buildings are the sub-sector with the highest energy consumption. Meanwhile, office buildings continue to experience positive growth. In Jakarta, high-rise office buildings with curtain wall facades are trending. This type of facade has many advantages but has lower energy performance and natural lighting compared to wall-opening construction. In Indonesia, the design of high-rise building facades is regulated in the SNI 6389: 2020 regulation concerning building envelope conservation through the OTTV standard. OTTV does not aim to represent building performance, but OTTV is still a top priority compared to performance-based calculations so that OTTV calculations must still be carried out in performance simulation-based design. This study aims to identify the sensitivity of OTTV, IKE, UDI, and sGA based on a study of the design characteristics of high-rise office facades in Jakarta. The analysis of facade design characteristics uses figure ground and literature review. Figure ground was carried out on 39 buildings in the MH Thamrin, Sudirman, and Kuningan areas. The results of the study showed WWR 61-80%, horizontal or vertical shading type with placement following the frame, and spandrel with the outermost layer of glass. These findings were then used as considerations for the model and input variable values. The input variables are the mass form and facade design. The mass form variable consists of orientation and aspect ratio. The facade design variables consist of WWR, shading type, number of shading positions, vision area glass material, and spandrel glass material. The mass form was analyzed using trend analysis. The results showed that the greater the AR value, the greater the sensitivity of IKE and OTTV due to orientation. Meanwhile, the facade design was analyzed using multiple linear regression and then the SRCs ranking was carried out to compare the significance between facade design variables. The results showed that significant variables (regression coefficient> 0.50) were the SC and VT properties of the vision area glass. Less significant variables (regression coefficient 0.30 - 0.49) were WWR and shading. WWR was significant for all objectives. While the shading strategy was only significant for IKE and UDI-e. However, not all shading designs were significant.