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Minimum Airflow of Single Duct VAV Terminal Boxes

[+] Author Affiliations
Young-Hum Cho

Kumoh National Institute of Technology, Gumi, Gyeongbuk, Korea

Paper No. IMECE2010-39961, pp. 519-524; 6 pages
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 5: Energy Systems Analysis, Thermodynamics and Sustainability; NanoEngineering for Energy; Engineering to Address Climate Change, Parts A and B
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4429-8
  • Copyright © 2010 by ASME


Terminal boxes are the critical component of the VAV systems. The minimum airflow of terminal boxes is a key factor for comfort, indoor air quality (IAQ) and energy cost. If the minimum airflow is higher than required, terminal boxes will have significantly more simultaneous heating and cooling, and AHUs will consume more fan power. Buildings will have IAQ problems if the minimum airflow is less than required. A building simulation was conducted to evaluate the impact of energy consumption on the minimum airflow of single duct VAV terminal boxes. The results show that simulation data revealed that compared with the existing set point, the improved optimal minimum airflow set point exhibited an annual energy savings of 29%.

Copyright © 2010 by ASME
Topics: Air flow , Ducts



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