Analysis of Glass Facade Walls with OTTV Value Calculation in the Domestic Departure Waiting Area at Yogyakarta International Airport

Abstract

Global warming, which results in climate dan temperature changes worldwide, causes the load on air conditioning systems in buildings to become heavier. Climate and temperature change lead to higher external heat loads, which are the heat entering the building due to solar radiation, conduction, and infiltration through the building envelope. To reduce these external loads, the SNI 6389-2020 design the criteria specify that the Overall Thermal Transfer Value (OTTV) must be less than or equal 35 Watts/m². This Study analyzes the OTTV value on the glass facade of the 33-34 departure waiting area at Yogyakarta International Airport, focusing on the glass facade wall. The method used in this research is quantitative exploratory and aims to determine the factors affecting the OTTV value and ensure whether the value meets the SNI 6389-2020 standard. The study found that the building orientation, material, and surrounding environmental condition affect the OTTV value. An optimal orientation by directing the long side of the building to the north and south can minimize solar radiation exposure. Materials with low U-value can reduce the rate of heat absorption and release, while hot and humid environmental conditions can increase the heat load on a building. The result of this study shows that the OTTV value on the glass facade of the 33-34 departure waiting area Yogyakarta International Airport is 34,43 Watt/m², which meets the standard set by SNI 6389-2020.