Influence of wind speed profile and roughness parameters on the downwind extension of vulnerable zones during dispersion of toxic dense gases |
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| Institution: | 1. Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China;2. Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin 300072, PR China;3. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, PR China;1. Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;2. Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin 300072, China;3. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China;1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, China;2. School of Civil and Environmental Engineering, Cornell University, Ithaca, NY 14850, USA;3. Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14850, USA;4. Nicholas School of the Environment, Duke University, Durham, NC 27705, USA |
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| Abstract: | The accidental release of toxic chemicals, which are heavier than air and stored under pressure, may create an emergency scenario in an industrial plant. The extension of vulnerable distance in the downwind direction is an important criterion in framing an emergency management plan of that industrial area. There are several studies showing the role of surface level meteorological and topographical features on its propagation and dispersion just after its release from a container. In the present study, vertical variation of wind speed in the atmospheric boundary layer and surface roughness parameter have been considered to study their roles on the impact of downwind extension of vulnerable distances. A catastrophic release from a tonner having 900 kg of liquid chlorine has been considered, and SAFETI Micro developed by DNV Technica, UK has been utilized in the consequence analysis of this release. The analysis results have been explained for various atmospheric stability classes and surface wind speeds. |
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