이코노마이저 제어 방법에 따른 사무소 건물의 냉방 에너지 성능 비교

Abstract

Abstract Current building procedures seek to minimize external air supplies to reduce the energy consumption of air conditioning, resulting in a high dependency on mechanical ventilation. We therefore studied an economizer-cycle system, whereby the introduction of external air saves energy. We analyzed different economizer-control methods, addressing mixed-airtemperatures and outdoor-air fractions according to outdoor-air temperatures; also, we analyzed the energy consumption ofthe three economizer-cycle control types using detailed EnergyPlus simulation modeling. A differential enthalpy control methodshowed a lower energy consumption range from 5.8% to 6.2% than that of other methods during the simulated period. A differential dry-bulb control method showed a 12.7% lower energy consumption than the no-economizer method in the intermediate period, but also showed 7.1% more energy consumption during the summer period. When latent heat was not removed due to high summer humidity, we found a significant level of resultant energy consumption.