Innovative Approach for Estimating Fugitive Gaseous Fluxes Using Computed Tomography and Remote Optical Sensing Techniques

Details

• Personal Author:
  Hashmonay RA ; Yost MG
• Description:
  This paper presents a new approach to quantify emissions from fugitive gaseous air pollution sources. The authors combine Computed Tomography (CT) with Path-Integrated Optical Remote Sensing (PI-ORS) concentration data in a new field beam geometry. Path-integrated concentrations are sampled in a vertical plane downwind from the source along several radial beam paths. An innovative CT technique, which applies the Smooth Basis Function Minimization method to the beam data in conjunction with measured wind data, is used to estimate the total flux from the fugitive source. The authors conducted a synthetic data study to evaluate the proposed methodology under different meteorological conditions, beam geometry configurations, and simulated measurement errors. The measurement errors were simulated based on data collected with an Open-Path Fourier Transform Infra-Red system. This approach was found to be robust for the simulated errors and for a wide range of fluctuating wind directions. In the very sparse beam geometry examined (eight beam paths), successful emission rates were retrieved over a 70 degrees range of wind directions under extremely large measurement error conditions. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Air Pollution, Indoor Environmental Monitoring Occupational Health Safety Software
• Keywords:
  Air-contamination Air-filters Air-purification Air-quality-measurement Air-samples Air-sampling Computer-models Exposure-assessment Exposure-levels Mathematical-models Models Simulation-methods Workers

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• ISSN:
  1096-2247
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 10 ; Washington
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  49
• Issue:
  8
• NIOSHTIC Number:
  nn:20030009
• Citation:
  J Air Waste Manage Assoc 1999 Aug; 49(8):966-972
• Contact Point Address:
  Department of Environmental Health, University of Washington, Seattle, WA
• Federal Fiscal Year:
  1999
• Peer Reviewed:
  True
• Source Full Name:
  Journal of the Air and Waste Management Association
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:b3f9c1b80fd44d361566715737f937b891921eac792ece84316002da353e2f8dbdd7ef0f861b2ad1720c3e6e2e9f6fbe8c9335dd0c205836c8eac1c222e00ba6
• Download URL:
  https://stacks.cdc.gov/view/cdc/190870/cdc_190870_DS1.pdf
• File Type:
  [PDF - 1014.60 KB ]