Computational study of personal ventilation jets using a sweating, breathing, thermal manikin

Jackie Russo, H. Ezzat Khalifad, Thong Dang

Research output: Contribution to conferencePaper

Abstract

In this paper we use an experimentally validated computational fluid dynamics (CFD) model that includes a personal ventilation (PV) system, seated thermal manikin and floor diffuser to assess the effect of moisture and breathing on PV. The PV systems include a single round jet and a novel low-mixing Co-flow nozzle that direct fresh air toward the breathing zone (BZ). First, we compare the air quality in the BZ of a thermal manikin with a skin wettedness of 0%, 6% and 50% for both PV systems. We also compare the air quality in the BZ for a case with no breathing, steady inhalation of 6 lpm and unsteady sinusoidal and realistic breathing of 6 lpm for both PV systems. The results show that the Co-flow nozzle is more robust than the single jet, however, both moisture or breathing modeling method have little effect on the BZ air quality when using a PV system that directs air towards the face.

Original languageEnglish (US)
StatePublished - Dec 1 2009
Event9th International Healthy Buildings Conference and Exhibition, HB 2009 - Syracuse, NY, United States
Duration: Sep 13 2009Sep 17 2009

Other

Other9th International Healthy Buildings Conference and Exhibition, HB 2009
CountryUnited States
CitySyracuse, NY
Period9/13/099/17/09

Keywords

  • Breathing zone
  • Personal ventilation
  • Thermal manikin

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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    Russo, J., Khalifad, H. E., & Dang, T. (2009). Computational study of personal ventilation jets using a sweating, breathing, thermal manikin. Paper presented at 9th International Healthy Buildings Conference and Exhibition, HB 2009, Syracuse, NY, United States.