Relative Ventilation Effectiveness in a Mechanically Ventilated Airspace Under Isothermal Conditions

Details

• Personal Author:
  Jerez SB ; Maghirang RG ; Predicala BZ
• Description:
  The relative ventilation effectiveness for airborne dust was evaluated in a mechanically ventilated airspace under isothermal flow conditions. Three supply air inlets, specifically, one-way ceiling, two-way ceiling, and sidewall, were compared at ventilation rates of 0.1, 0.5, 0.7, and 1.0 m3/s. The dust concentrations were measured with inhalable dust samplers, from which the relative ventilation effectiveness at various locations, the overall relative ventilation effectiveness for the airspace, and the spatial variability in dust concentrations were obtained. Results showed that the dust concentration and the relative ventilation effectiveness varied with location and for the three air inlets. The one-way ceiling air inlet, in which the supply air jet was directed away from the exhaust fan, was the best in removing the dust from the locations considered. It had the highest overall relative ventilation effectiveness (Eo=1.34), although it also had the highest spatial variability in dust concentration (CV=0.48). The sidewall air inlet, on the other hand, had the most uniform dust concentration (CV=0.36); however, it had the lowest relative ventilation effectiveness (Eo=0.67). Additional research should consider other types of air inlets and nonisothermal conditions. [Description provided by NIOSH]
• Subjects:
  Agriculture Air Pollutants, Occupational Air Pollution Air Pollution, Indoor Dust Occupational Health Particulate Matter Safety Ventilation
• Keywords:
  Agricultural-industry Air-contamination Air-quality Air-quality-control Airborne-dusts Airborne-particles Air Quality Author Keywords: Airborne Dust Dusts Particulate-dust Particulates Ventilation-systems

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• ISSN:
  0001-2351
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Kansas ; OSHA Region 7
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  44
• Issue:
  3
• NIOSHTIC Number:
  nn:20022339
• Citation:
  Trans ASAE 2001 May/Jun; 44(3):691-696
• Contact Point Address:
  Ronaldo G. Maghirang, 147 Seaton Hall, Kansas State University, Manhattan, KS 66506
• Email:
  rmaghir@ksu.edu
• Federal Fiscal Year:
  2001
• NORA Priority Area:
  Work Environment And Workforce: Indoor Environment
• Performing Organization:
  Kansas State University, Manhattan, Kansas
• Peer Reviewed:
  True
• Start Date:
  19990930
• Source Full Name:
  Transactions of the American Society of Agricultural Engineers
• End Date:
  20020929
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:a7fd9143869d36af829db686ccf53af2c58b46e28d3a7286da1d1f8bca270bd3a1896fc07841e11b5e0d900da3095828dcda39b4557b600a645bb7b28ad2ad76
• Download URL:
  https://stacks.cdc.gov/view/cdc/199149/cdc_199149_DS1.pdf
• File Type:
  [PDF - 78.52 KB ]