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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Detailed Analysis on Operation Characteristics and Cooling Energy Saving Effect of Chiller Staging in an Office Building

사무소 건물에서 냉동기의 대수제어를 통한 냉동기 거동 특성 및 에너지 절감 효과 분석

  • 서병모 (국립한밭대학교 대학원 건축공학과) ;
  • 손정은 (국립한밭대학교 대학원 건축공학과) ;
  • 이광호 (국립한밭대학교 건축공학과)
  • Received : 2015.09.16
  • Accepted : 2016.03.14
  • Published : 2016.04.10
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Abstract

Commercial buildings account for a significant proportion of the total building energy use in Korea, and cooling energy, in turn, accounts for the largest proportion of total energy consumption in commercial buildings. Under this circumstance, chiller staging is considered to be a reasonable and practical solution for cooling energy saving. In this study, the part-load ratio and the operating characteristics of a vapor compression chiller were analysed within an office building. In addition, energy consumption among different chiller staging schemes was comparatively analysed. As a result, significant proportions of total operating hours, cooling load and energy consumption turned out to be in the part load ratio range from 0% through 50%, and thus energy consumption was significantly affected by the chiller COP at low part-load conditions, indicating that the chiller operation at the part-load is an important factor in commercial buildings. In addition, utilizing a sequential chiller staging scheme can reduce the annual cooling energy usage by more than 10.3% compared to operating a single chiller.

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References

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