Optimization of Stadium Building Operational Costs by Implementing Green Building Design Concepts

Currently, all buildings constructed by the government are required to implement the Green Building (BGH) principles. In addition to complying with existing regulations, the implementation of BGH also offers several benefits, including creating more environmentally friendly buildings and achieving more efficient operational costs. In this study, the method used involved collecting data from survey reports at three stadiums, namely Patriot Candrabhaga Stadium in Bekasi city, Wibawa Mukti Stadium in Bekasi regency, and Harapan Bangsa Stadium in Banda Aceh. However, this study focuses only on survey data from Wibawa Mukti Stadium in Bekasi regency, West Java, due to its similar spectator capacity and electrical system. Subsequently, a redesign of the electrical system was carried out by implementing the BGH concept. After the construction phase based on the electrical system design following the BGH principles was completed, The author conducted a check on electricity usage to understand electricity consumption after the renovation. Based on the author's observations, electricity consumption before and after implementing the BGH concept showed a significant decrease. Electricity consumption before the improvements was recorded at an Active Power of 13,227.36 kWh and a Reactive Power of 10,251.15 kVARh. Meanwhile, after the improvements, electricity usage showed an Active Power of 5,926.85 kWh, and Reactive Power was not calculated because the cos phi value of 0.93 exceeded the minimum penalty limit set by PLN at 0.85. There was an electricity savings of 7,300.51 kWh in one month, which means a 55% savings in kWh payments and 100% in kVARh payments. This indicates that the implementation of the BGH concept can effectively reduce electricity consumption in a building, which in turn will contribute to reducing the load on conventional power plants reducing the burden on conventional power plants that are not environmentally friendly.