THE INFLUENCE OF PREFABRICATED FACADE VARIANTS ONENERGY CONSUMPTION IN THE CONSTRUCTION OF APARTMENTS

• Main Author: Aisha, Heidi
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/62367
• Institution: Institut Teknologi Bandung

The increase in residential development from year to year is one of the causes of the extensive energy use globally and in Indonesia. Therefore, a fast, environmentally friendly, and energy-efficient development process is needed, one of which is the precast construction method. On the one hand, the facade is a building component that significantly influences energy consumption. Therefore, to evaluate the energy consumption of the variant of precast walls used as the facades of apartments, conduct this study. The case study used is the design of a low-energy apartment prototype building in Tegal City, Central Java, with a precast wall facade product variant from a manufacturer in West Java compared with standard precast concrete walls and other conventional wall materials. Embodied energy and operational energy using the Life Cycle Assessment (LCA) approach to evaluate the energy consumption of buildings. The LCA stages include the material production stage and the installation process of precast wall variants for embodied energy calculations and the building use stage for operational energy calculations. There are four stages to conduct this research—the usage of precast wall variants identified on mapping the distribution in apartments and literature studies. The Input-Output table analysis method carried out the embodied energy value calculation phase. Disparity, simulating the operational energy of the building, carry out the operational energy calculation with the OpenStudio + EnergyPlus application. Then, the analysis phase of regression analysis and variance analysis of the material characteristics of precast wall variants carry out the factors that affect the value of embodied energy and operational energy of precast wall variants. Then, the analysis phase of the relationship between the value of the embodied energy with the building operational energy analyses the correlation between the value of the embodied energy with the building operational energy. Moreover, this concluded various variants of precast walls as facade walls of apartments in Indonesia. With each of these variants having various embodied and operational energy values and depending on the characteristics of each material so that there is a relationship between energy values embodied variant of precast facade walls with the operational energy of the building with the value of the embodied energy of each group of wall variants is inversely proportional to the operational energy of the building. Hence, the facade wall variant recommended avoiding using standard precast concrete variants and choosing a wall variant that is a material with a low energy intensity of embodied but still has a high thermal resistance value (r-value).