A Detailed Analysis of the Part Load Ratio and Cooling Energy Characteristics of Chiller Operation in an Office Building

사무소 건물에서 냉동기의 부분부하율 및 냉방 에너지 성능 특성 분석

  • Received : 2015.07.16
  • Accepted : 2015.09.10
  • Published : 2015.11.10


Commercial buildings account for significant portions of the total building energy in Korea, and thus, a variety of research on chiller operation has been carried out. However, most of the studies were carried out on the chiller itself, i.e., the part load ratio characteristics and the corresponding electricity energy consumption patterns were not analyzed in existing studies. In this study, the part load ratio and the operating characteristics of the vapor compression chiller were analyzed within an office building equipped with the conventional variable air volume system. As a result, significant portions of total operating hours, cooling load, and energy consumption turned out to be in the part load ratio range of 0 through 50%. Thus, energy consumption was significantly affected by the chiller COP at low part load conditions, indicating that chiller operation at the part load is an important factor in commercial buildings.


Commercial building;Part load ratio;Chiller staging;Coefficient of performance;EnergyPlus


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Cited by

  1. Detailed Analysis on Operation Characteristics and Cooling Energy Saving Effect of Chiller Staging in an Office Building vol.28, pp.4, 2016,
  2. Recent Progress in Air-Conditioning and Refrigeration Research : A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2015 vol.28, pp.6, 2016,


Grant : 바닥 공조 적용 에너지 절약형 성층화 기술 및 디퓨저 개발

Supported by : 중소기업청