Case Analysis of Energy Consumption Characteristics of High School Facilities for Zero Energy School Realization

The characteristics of energy consumption of school buildings considering their distinctive functional schedule (including summer and winter vacation) differ from those of residential and business buildings. In order to build zero-energy schools, the introduction of an energy-saving plan and renewable energy system that reflect the actual energy use of school buildings should be considered. However, ECO2, the only evaluation tool used for zero-energy building certification, does not reflect the actual energy use of schools. In this study, we analyzed characteristics of energy consumption of ‘S’ high school located in Jincheon, Chungcheongbuk-do, based on measurement data received from a remote monitoring system and city gas usage. Based on the results, the measured actual energy consumption and the energy consumption evaluated in the ‘Building Energy Efficiency Certification’ were compared. The energy-use intensity of the actual energy consumption was 125.9 kWh/m 2 yr, which was 1++ grade. The energy use intensity evaluated through this certification was 188.9 kWh/m 2 yr, which was 1+ grade. Concerning energy consumption by use, the actual energy consumption in decreasing order was heating (31%), ventilation (25%), cooling (23%), lighting (15%), and hot water supply (6%; excluding cooking), and electric appliance and plug load (37%). Cooling was the largest unit according to “Building Energy Efficiency Certification” evaluation criteria at 36%, followed by heating (31%), lighting (11%), ventilation (10%), and hot water (9%). The results differed considerably from the actual energy consumption and energy consumption evaluated through ECO2. The results would likely be distorted if an energy reduction measure and a zero energy implementation plan were established based on the results.