Validation of FLACS against experimental data sets from the model evaluation database for LNG vapor dispersion |
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| Authors: | Olav R Hansen Filippo Gavelli Mathieu Ichard Scott G Davis |
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| Institution: | 1. SINOPEC Qingdao Research Institute of Safety Engineering, Qingdao, 266000, China;2. School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China;1. State Key Laboratory of Technologies in Space Cryogenic Propellants, Beijing 100028, China;2. Beijing Institute of Aerospace Testing Technology, Beijing 100074, China;3. Beijing Engineering Research Center of Aerospace Propulsion Testing Technology and Equipment, Beijing 100074, China;1. Department of Physics and Technology, University of Bergen, Allégaten 55, 5007 Bergen, Norway;2. GexCon AS, Research and Development, Fantoftveien 38, P.O. Box 6015, Postterminalen, 5892 Bergen, Norway;3. School of Process, Environmental and Materials Engineering, University of Leeds, Leeds LS2 9JT, UK;4. GL Noble Denton, Holywell Park, Ashby Road, Loughborough LE11 3GR, UK;1. Gexcon AS, Fantoftvegen 38, 5072, Bergen, Norway;2. Department of Physics and Technology, University of Bergen, Allégaten 55, 5007 Bergen |
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| Abstract: | The siting of facilities handling liquefied natural gas (LNG), whether for liquefaction, storage or regasification purposes, requires the hazards from potential releases to be evaluated. One of the consequences of an LNG release is the creation of a flammable vapor cloud, that may be pushed beyond the facility boundaries by the wind and thus present a hazard to the public. Therefore, numerical models are required to determine the footprint that may be covered by a flammable vapor cloud as a result of an LNG release. Several new models have been used in recent years for this type of simulations. This prompted the development of the “Model evaluation protocol for LNG vapor dispersion models” (MEP): a procedure aimed at evaluating quantitatively the ability of a model to accurately predict the dispersion of an LNG vapor cloud.This paper summarizes the MEP requirements and presents the results obtained from the application of the MEP to a computational fluid dynamics (CFD) model – FLACS. The entire set of 33 experiments included in the model validation database were simulated using FLACS. The simulation results are reported and compared with the experimental data. A set of statistical performance measures are calculated based on the FLACS simulation results and compared with the acceptability criteria established in the MEP. The results of the evaluation demonstrate that FLACS can be considered a suitable model to accurately simulate the dispersion of vapor from an LNG release. |
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