Effect of air change rate on particle dispersion from inlet opening under varying particle source strengths

Cetin Y. E., Avcı M., Aydin O.

INTERNATIONAL JOURNAL OF VENTILATION, cilt.21, sa.3, ss.177-194, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 21 Sayı: 3
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1080/14733315.2020.1823071
  • Dergi Adı: INTERNATIONAL JOURNAL OF VENTILATION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex
  • Sayfa Sayıları: ss.177-194
  • Anahtar Kelimeler: Air change rate, particle source strength, similarity, ventilation, SUPPLY DISPLACEMENT VENTILATION, DEPOSITION RATES, FINE PARTICLES, DECAY-RATES, FLOW, QUALITY, SYSTEMS, PENETRATION, EXPOSURE, REMOVAL
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Evet

Özet

In this study, effect of air change rate (air change per hour - ACH) on indoor particle dispersion and deposition in a ventilated room is investigated. A reduced-scale model is designed to conduct experiments. Numerical predictions are performed by using the commercial software ANSYS Fluent 16.0. Four different values of the air change rate (1.73, 2.88, 5.76 and 7.68) and five different values of the particle diameter (0.181, 2.188, 4.42, 8.89 and 17.8 mu m) are considered. Constant particle flow rate and proportional particle flow rate with inlet velocity cases are examined comparatively. Results show that, except from some inconsistencies for the largest particle diameter due to the accumulation and outlet opening location, the contaminant level decreases with increasing air change rate for a constant value of the particle flow rate while an opposite trend is observed for the proportional particle flow rate case.