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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Study of Static Pressure Differential Measurement of Nozzle for Miniaturization of a Air Flow Meter

풍량 측정 장치 소형화를 위한 노즐 정압차 측정 연구

  • Oh, Sang-Teak (Graduate School of Energy & Environment, Seoul National University of Science and Technology) ;
  • Kim, Young Il (School of Architecture, Seoul National University of Science & Technology) ;
  • Chung, Kwang-Seop (School of Architecture, Seoul National University of Science & Technology)
  • 오상택 (서울과학기술대학교 에너지환경대학원) ;
  • 김영일 (서울과학기술대학교 건축학부) ;
  • 정광섭 (서울과학기술대학교 건축학부)
  • Received : 2016.08.02
  • Accepted : 2016.09.23
  • Published : 2016.10.10
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Abstract

Air flow measurement is a fundamental and important task for testing, adjusting, and balancing of HVAC system. However, it is difficult to carry out in the field due to the large size and weight of the flow meter. In this study, for the purpose of developing a small and portable flow meter, we proposed a different method of static pressure measurement and verified it experimentally. In the proposed method, static pressure difference was measured by inserting a tube inside the chamber before and after the nozzles. The results were compared with measurements according to the ANSI/ASHRAE standard. The results were in good agreement, indicating that the inserted tube method could be used for static pressure measurement of a portable flow meter. The proposed method eliminates the pressure tubes that are attached outside, which results in smaller size and easy handling.

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References

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