Numerical Modeling of the Effects of a Thermal Fence on Pollutant Dispersion in the Stable Atmospheric Boundary Layer

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  • a Department of Environmental Engineering, Anyang University, Manan-Ku, Anyang, Kyunggi-do, South Korea
  • b Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana
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Abstract

Numerical studies were conducted to evaluate the effects of a line of heating-that is, a thermal fence-on the short-range (less than 1 km from the pollutant source) dispersion of pollutants under various stable nighttime conditions. The thermal fence was located downwind of a ground-based pollutant source. The heating rate was varied from 103 W m−1 (watts per meter length of the fence) to 106 W m−1. Initial numerical results demonstrated that the thermal fence enhanced vertical mixing of pollutants behind the fence and could reduce the downwind ground-level concentration by more than 60%. Estimated fuel cost was $2.50 per hour per meter with a typical heating rate of 105 W m−1. The thermal fence might be a useful means of alleviating odors and reducing exposure to contaminants, from short-term releases especially.

Abstract

Numerical studies were conducted to evaluate the effects of a line of heating-that is, a thermal fence-on the short-range (less than 1 km from the pollutant source) dispersion of pollutants under various stable nighttime conditions. The thermal fence was located downwind of a ground-based pollutant source. The heating rate was varied from 103 W m−1 (watts per meter length of the fence) to 106 W m−1. Initial numerical results demonstrated that the thermal fence enhanced vertical mixing of pollutants behind the fence and could reduce the downwind ground-level concentration by more than 60%. Estimated fuel cost was $2.50 per hour per meter with a typical heating rate of 105 W m−1. The thermal fence might be a useful means of alleviating odors and reducing exposure to contaminants, from short-term releases especially.

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