| Title |
Comparison of Cooling-Energy Performance Depending on the Economizer-Control Methods in an Office Building |
| Authors |
Jeong-Eun Son ; In-Tak Hyun ; Jea-Ho Lee ; Kwang Ho Lee |
| DOI |
http://dx.doi.org/10.6110/KJACR.2015.27.8.432 |
| Keywords |
외기냉방 ; 사무소 건물 ; 건구온도제어 ; 냉방 에너지 ; 에너지 성능 ; 에너지플러스 Economizer ; Office Building ; Differential Dry-bulb ; Cooling Energy ; Energy Performance ; EnergyPlus |
| 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-air temperatures and outdoor-air fractions according to outdoor-air temperatures; also, we analyzed the energy consumption of the three economizer-cycle control types using detailed EnergyPlus simulation modeling. A differential enthalpy control method showed 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. |