Impact of leakage location and downwind storage tank on the gas dispersion in a typical chemical tank storage area |
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| Institution: | 1. School of Emergency Management and Safety Engineering, China University of Mining and Technology - Beijing, D11 Xueyuan Road, Haidian District, Beijing, 100083, China;2. China Oil & Gas Pipeline Network Corporation, 5 Dongtucheng Road, Chaoyang District, Beijing, 100020, China;1. Industry School of Standardization, University of Jinan, Jinan, China;2. State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, China;3. Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET), Nanjing University of Information Science & Technology, Nanjing, Jiangsu, China;1. School of Petrochemical Technology Beijing, Beijing, 102627, China;2. Beijing Institute of Safety Production Engineering and Technology, Beijing, 102627, China;3. Beijing Gas Changping Co., Beijing, 102200, China;4. University of Science and Technology Kunming, Kunming, 650031, China;1. Petroleum Engineering School, Southwest Petroleum University, China;2. Gas Management Department, PetroChina Southwest Oil and Gas Field Branch Company, China |
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| Abstract: | Toxic gas leakage in a tank area can have catastrophic consequences. Storage tank leakage location (particularly for high leakage) and downwind storage tanks potentially influence gas diffusion in tank areas. In this study, we developed a numerical and experimental method to investigate the impact of a high leakage location and downwind storage tank on gas diffusion based on three (1.05H, 0.90H, and 0.77H, H was the tank height, 22m) leakage field experiments on the leeward side of storage tank, which have been not conducted before. The experiments revealed an unexpected phenomenon: the maximum ground concentration first decreased and then increased with increasing leakage height. The simulations illustrated that the differences in micrometeorological conditions caused the maximum ground concentration of gas emitted from the roof to be higher than that emitted from the tank wall near the storage tank height. The downwind storage tank 1) had little influence on the entire diffusion direction but altered the local diffusion pattern; 2) reduced the maximum ground concentration (～18.7%) and the distance from the emission source (approximately a storage tank diameter); and 3) had strong influences on the concentration, velocity, turbulence, and pressure on the leeward side. The concentration negatively correlated with the velocity, pressure, and turbulence in the middle of the two storage tanks on wind centerline. Our results can improve understanding of gas dispersion in tank areas and provide references for mitigating loss and protecting lives during emergency response processes. |
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| Keywords: | Field experiments Tank area Leakage location Gas diffusion Small scale |
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