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A Study on Characteristic Analysis for Indoor Ventilation Performance of Mechanical Ventilation System

기계 환기시스템의 실내 환기성능 특성 해석에 관한 연구

  • Ku, Jae-Hyun (Dept. of Fire Protection & Safety Management, Mokwon University)
  • 구재현 (목원대학교 소방안전관리학과)
  • Received : 2012.02.29
  • Accepted : 2012.04.24
  • Published : 2012.04.30

Abstract

This paper describes to analyze the ventilation performance of a room air conditioner for indoor comfort control. An experimental apparatus consists of a test room, the room air conditioner, a tracer gas measurement system, a supply fan and a controller. Ventilation performance as a function of human occupancy is evaluated with supply ventilation air using a tracer gas technique of CO2 gas in the test room. The ventilation performance is evaluated in a step-down method based on ASTM Standard E741-83 and is found to increase with increasing supply ventilation rate. The CO2 gas concentration is decayed rapidly without human occupancy. The ventilation performance without human occupancy increases up to 55% and the ventilation performance with one person increases up to 25% at the supply air of 570 lpm comparing with a natural reduction after one hour. A modeling for ventilation performance of a room air conditioner in a test room is presented using experimental datum.

본 연구는 실내 쾌적성 제어를 위하여 룸 에어컨의 환기성능을 분석한다. 실험장치는 환경공조챔버, 룸 에어컨, 추적가스 측정시스템, 급기팬과 제어기로 구성된다. 환기성능은 ASTM Standard E741-83 기준에 근거하여 환경공조챔버 내 CO2 추적가스기법을 사용한 체강법에 의해 재실자와 급기 환기량에 따라 평가된다. 급기 환기량 증가에 따라 환기성능이 증가함을 파악하였으며 재실자가 없는 경우 CO2 가스는 빠르게 감소하며 이때의 환기성능은 55%까지 증가한다. 그리고 1명의 재실자가 있는 경우 1시간 경과후 급기량 570 lpm에서 환기성능은 자연감쇠와 비교하여 25%까지 증가한다. 실험 데이터를 사용하여 환경공조챔버 내 룸 에어컨의 환기성능 모델링을 도출하였다.

Keywords

References

  1. Etheridge, D. and Sandberg, M., Building Ventilation Theory and Measurement, Johnwiley & Sons., USA, (1996)
  2. ASHRAE Standard 62-1989, Ventilation for Acceptable Indoor Air Quality, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., Antlanta, Ga, (1989)
  3. ASHRAE, ASHRAE Handbook Fundamentals, Atlanta, USA, (1997)
  4. Cheng, Y. S., "Efficiency of a Portable Indoor Air Cleaner in Removing Pollens and Fungal Spores", Aerosol Science and Technology, Vol. 29, pp. 92-101, (1998) https://doi.org/10.1080/02786829808965554
  5. ASTM Standard 741-83, "Standard Test Method for Determining Air Change in a Single Zone by Means of a Tracer Gas Dilution.", USA, (1990)
  6. Han, H. T., On the definition of ventilaton effectiveness, Korea Journal of Air-Conditioning and Refrigeration Engineering, Vol. 28, No. 1, pp. 39-45, (1999)
  7. Bearg, D. W., Indoor Air Quality and HVAC System, Lewis Publishers, USA, (1993)
  8. Lee, J. K., Ku, J. H., Han, J. G., Kang, T. W., Lee, K. G., Cho, M. C., "A Study on Ventilation Effectiveness of Mixing and Displacement Ventilation Systems in the Non- isothermal Supply Using a Model Chamber", Proceeding of the SAREK 2001 Summer Annual Conference, pp. 654-658, (2001)

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  1. 이중관 재질에 따른 이중관형 열회수 환기장치의 열회수 특성 연구 vol.18, pp.4, 2012, https://doi.org/10.5762/kais.2017.18.4.21