| Keywords |
Photovoltaic system; Energy storage system; Net-zero energy building; Self-Consumption; Self-Sufficiency |
| Abstract |
This study analyzed the optimal strategy for achieving a Net-Zero Energy Building (NZEB) by utilizing Photovoltaic (PV) systems and Energy Storage Systems (ESS) in a medium office building. Using a building model based on the U.S. Department of Energy's (DOE) medium office prototype, simulations were performed based on weather data from Daejeon, South Korea. Self-Consumption (SC) Self-Sufficiency (SS) was comprehensively analyzed by applying PV system and ESS with different capacities. The results show that NZEB can be achieved when the PV system capacity is more than 180 kW, and Plus Energy Building (PEB) can be achieved when the PV system capacity is more than 200 kW. In addition, the use of ESS plays an important role in effectively storing surplus PV power generation and maximizing energy efficiency through load shifting. This study provides important implications for increasing the energy efficiency of medium office buildings, and future grid-integrated system analysis will lead to more advanced strategies. |