OTTV ANALYSIS AND POSSIBLE DESIGN IMPROVEMENTS ON ASRI MEDICAL CENTER YOGYAKARTA TO REDUCE ENERGY USE

Abstract

As a public building that runs continuously, hospitals need a lot of energy. In addition, the building industry in Indonesia has previously been blamed for 50% of the sector's entire energy use, which amounts to almost 70% of all power usage. In order to regulate and minimize energy usage, an examination of OTTV (Overall Thermal Transfer Value) is required. Asri Medical Center in Yogyakarta will be used as the study's subject since it mostly uses glass for its exterior and is oriented east and west, which is thought to have a higher heat transmission. Due to this, the OTTV will be carried out to guarantee that the building's current score does not exceed 35 W/m2 (SNI, 2011). In order to reduce the score, a quantitative method will be used by doing modifications on the WWR, U value, as well as a shading device. These modifications have resulted in some improvements whereas the WWR modification can reduce the OTTV scores by 41%, and glass material changes by 43,4%. However, there is no significant change in the shading device modification since it only improves by 16,4% and not meeting the standard yet.