Effect of ventilation system on particle spatial distribution in ventilated rooms

Xinlei Wang, Yuanhui Zhang, Ted L. Funk, Lingying Zhao, Gerald L. Riskowski

Research output: Contribution to journalConference articlepeer-review


Airborne particulate matter has been implicated as a major contributor to the increased incidence of respiratory disorders among people working in livestock buildings. A clear understanding of particle spatial distribution can provide important information for improvement of ventilation system design and control strategies. In this study, the dust mass spatial distributions in three different ventilation systems were measured using a multi-point sampler in a full-scale mechanically ventilated laboratory room under controlled conditions. The experimental results showed that the particle mass spatial concentrations varied widely as a result of ventilation. Increasing the ventilation rate within the same ventilation system reduced the overall mean particle concentration. At the same ventilation rate, the ventilation effectiveness varied widely with different ventilation systems. The experimental results also showed that the air outlet location had a substantial effect on the dust spatial distribution and the overall dust mass concentration. Ventilation system design was therefore shown to be critical to dust control in a mechanically ventilated airspace. Positioning the air outlet at the dustiest location can substantially improve dust removal effectiveness. The ventilation effectiveness factor was used to quantitatively describe the effectiveness of a ventilation system for removal of pollutants in a ventilated airspace.

Original languageEnglish (US)
Article number4717
Pages (from-to)258-266
Number of pages9
JournalASHRAE Transactions
Volume110 PART II
StatePublished - 2004
EventTechnical and Symposium Papers - 2004 Annual Meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers - Nashville, TX, United States
Duration: Jun 26 2004Jun 30 2004

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering


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