Terminal box minimum airflow optimization of single duct air handling units

Young Hum Cho, Gang Wang, Mingsheng Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


Terminal boxes control space conditions in variable air volume (VAV) air-handling unit (AHU) systems. Terminal boxes either modulate airflow with a control damper or adjust discharge air temperature with a reheat coil. Terminal boxes will have a significant amount of simultaneous heating and cooling and AHUs will consume more fan power if the minimum airflow is higher than required. On the other hand, conditioned space will have indoor air quality (IAQ) problems with less air circulation if the minimum airflow is less than required. The objective of this study is to optimize the minimum airflow ratio to improve thermal environment and save energy consumption. In this study, the problem of current fixed minimum airflow ratio of terminal box is analyzed and variable minimum airflow ratio as an alternative is suggested. The results of this study show that variable minimum airflow ratio can stably maintain the set room air temperature and reduce energy consumption for varying heating loads compared to the conventional fixed minimum airflow ratio.

Original languageEnglish (US)
Title of host publicationProceedings of the Energy Sustainability Conference 2007
Number of pages8
StatePublished - Dec 24 2007
Externally publishedYes
Event2007 Energy Sustainability Conference - Long Beach, CA, United States
Duration: Jun 27 2007Jun 30 2007

Publication series

NameProceedings of the Energy Sustainability Conference 2007


Other2007 Energy Sustainability Conference
Country/TerritoryUnited States
CityLong Beach, CA

ASJC Scopus subject areas

  • Energy(all)
  • Electrical and Electronic Engineering


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