Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Comparison of Cooling-Energy Performance Depending on the Economizer-Control Methods in an Office Building

이코노마이저 제어 방법에 따른 사무소 건물의 냉방 에너지 성능 비교

  • 손정은 (국립한밭대학교 대학원 건축공학과) ;
  • 현인탁 (국립한밭대학교 대학원 건축공학과) ;
  • 이재호 (국립한밭대학교 대학원 건축공학과) ;
  • 이광호 (국립한밭대학교 건축공학과)
  • Received : 2015.05.20
  • Accepted : 2015.07.17
  • Published : 2015.08.10
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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.

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References

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