A Novel Green Building Energy Consumption Intensity: Study in Inalum Green Building

The need for a building with a green building concept is now very important for environmental conservation. The concept of green building is to design a building that has a more efficient consumption of electrical energy. The Energy Consumption Intensity (ECI) of a building in Indonesia with a tropical climate is regulated in SNI no 03-0196: 2010. In this standard, the ECI of an air-conditioned building is said to be efficient if it has a consumption of 7.93-12.08 kWh/M2/month. Meanwhile, according to the Indonesian Green Building Council (GBCI), the ECI in Green Building is 50% of a conventional building. In this study, electrical energy consumption was measured for at least 1 year. The research location is the Head Office Building of PT Indonesia Asahan Aluminium (Persero), a State-Owned Enterprise located in Batubara Regency, North Sumatra, Indonesia. According to the results of the analysis of existing data, it can be concluded that the Inalum Building has an efficient electricity consumption intensity according to SNI standards, with a value of 78.34 kWh/m2/year or 6.53 kWh/m2/month. However, as a green building, the existing air-conditioned space still has an ECI value that exceeds the specified standard. According to the SNI standard classification, this building is still considered energy-intensive because the ECI value of an air-conditioned room is 243.56 kWh/m2/year or 20.29 kWh/m2/month. The novelty that we get in this research is the actual Energy Consumption Intensity (ECI) indexes of this green building.