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2025 Vol.45, Issue 3 Preview Page

Research Article

Field Application Test of Airflow Monitoring Technology in HVAC Systems

HVAC 시스템 풍량 모니터링 기술의 현장 적용성 검토

Yi Wang 1
,
Taeyang Kim1
,
JinHyun Lee2
,
Younghum Cho3*
왕 이1
,
김 태양1
,
이 진현2
,
조 영흠3*
1Master’s Course, Architecture Engineering, Graduate School of Yeungnam University
2Research Professor, Architecture Research Institute, Yeungnam University
3Professor, School of Architecture, Yeungnam University
1영남대학교 일반대학원 건축학과, 석사과정
2영남대학교 건축연구소, 연구교수
3영남대학교 공과대학 건축학부, 교수
*Corresponding Author
30 June 2025. pp. 111-123
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Abstract

Air-conditioning systems account for a significant proportion of building energy consumption, and their control strategies have a crucial impact on both energy efficiency and operational accuracy. Variable air volume (VAV) systems capable of dynamically adjusting airflow and temperature are widely used in large buildings. Compared to constant air volume systems, VAV systems offer superior energy efficiency and should therefore be prioritized. Accurate airflow monitoring is a key prerequisite for effective energy saving. To address the challenges in VAV system airflow monitoring, this study proposes an airflow-monitoring method based on field data. This method leverages fan laws and a quadratic fan-performance-curve model incorporating fan speed, duct damper position, and pressure difference to estimate airflow. Experiments were conducted by varying the fan speed (60 Hz) and damper opening (100－20%), and collecting airflow and pressure data. Model performance was validated using multipoint velocity measurements and error data (RMSE, CvRMSE, nRMSE, MBE, and R2). The results established an optimal accuracy at 40 Hz (RMSE = 300.77 CMH, R2 = 0.988, CvRMSE = 9.18%), and reduced precision under extreme conditions (CvRMSE = 28.22% at 20 Hz). This approach offers a low-cost alternative to physical sensors and contributes to improved energy efficiency and intelligent control in VAV-based Heating, Ventilation, and Air conditioning systems.

Keywords
Airflow Monitoring Technology
Fan Performance Curve
Fan Theory
HVAC System
키워드
풍량 모니터링 기술
팬 성능 곡선
팬 법칙
HVAC 시스템
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Information
  • Publisher :Korean Solar Energy Society
  • Publisher(Ko) :한국태양에너지학회
  • Journal Title :Journal of the Korean Solar Energy Society
  • Journal Title(Ko) :한국태양에너지학회 논문집
  • Volume : 45
  • No :3
  • Pages :111-123
  • Received Date : 2025-05-20
  • Revised Date : 2025-06-02
  • Accepted Date : 2025-06-04
  • DOI :https://doi.org/10.7836/kses.2025.45.3.111
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