Experimental Study on Air Diffusion Performance and Local Discomfort in the Space with an Active Chilled Beam System

설비형 칠드빔 시스템 적용 공간의 공기확산 성능 및 국부적 불쾌적에 관한 실험적 연구

  • Received : 2014.03.06
  • Accepted : 2014.06.30
  • Published : 2014.07.30


Active chilled beam systems, which have been gaining much popularity recently in Europe and North America, are known to be not only energy-efficient but also advantageous to uniform indoor environment quality. The objective of this study is to evaluate the performance of an active chilled beam system, in terms of air diffusion and local discomfort in the conditioned room. To do this, the evaluation was conducted using a full-scale test bed, where an active chilled beam system is designed and operated with a dedicated outdoor air system. A 2-axis traverse system was utilized to measure the air temperature and air velocity in the entire space of the test bed. The performance was evaluated using the three indices: ADPI to evaluate the uniform thermal comfort, DR(draught rate) to evaluate the discomfort due to excessive air movement, and vertical air temperature difference to evaluate local discomfort due to thermal stratification. The result shows that active chilled beam system is successful in providing the uniform indoor thermal environment with less supply air flow rate.


Active Chilled Beam System;Thermal Environment;Air Diffusion Performance;Draught;Vertical Air Temperature Difference


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