Study on distribution and deposition of house dust by different ventilation systems in a full-scale residential room

Yang Lu, Jing Liu, Hiroshi Yoshino, Rie Takaki, Genta Kurihara

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

House dust contamination has recently become an important issue in the residential indoor environment. This study evaluated ventilation systems for removing house dust efficiently in a full-scale residential room. Experiments and simulations were performed to investigate diffusion and deposition of house dust by different ventilation systems. Riboflavin particles were used as the house dust. Two kinds of ventilation systems were considered, namely ceiling exhaust and slit exhaust. In the experiments, whether high air change rate (2.5 ac/h) or low air change rate (0.75 ac/h), the amount of house dust in the ceiling exhaust was a little larger than that of the slit exhaust after house dust decreased to the same level as background. Diffusion fields were investigated by CFD simulations, the house dust with diameter of 0.5 ∼ 3.0 μm in the experimental data and calculated values showed good agreement. From the data, it is shown that the removal efficiency of the slit exhaust was 5.3% and 11.1% higher than the ceiling exhaust after two hours of operation at 0.75 ac/h and 2.5 ac/h, respectively. Based on the results of this study, it is concluded that the house dust in the full-scale residential room using a slit exhaust ventilation system is lower than ceiling exhaust at both high and low air change rates.

Original languageEnglish
Pages (from-to)417-426
Number of pages10
JournalInternational Journal of Ventilation
Volume13
Issue number4
DOIs
Publication statusPublished - 2015 Mar 1

Keywords

  • Full-scale residential room
  • House dust
  • Measurement. computational fluid dynamics (CFD)
  • Ventilation strategy

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Civil and Structural Engineering
  • Building and Construction
  • Electrical and Electronic Engineering

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