Consequence analysis of aqueous ammonia spill using computational fluid dynamics

Галеев, А. Д.; Салин, А. А.; Поникаров, С. И.

doi:10.1016/j.jlp.2012.12.006

Cited by 25 publications

(11 citation statements)

References 23 publications

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“…The second set of data considered refers to an ammonia release from an aqueous ammonia pool. 42 In this case, the threshold concentration value considered in the CFD simulations is relative to the toxic properties of ammonia and therefore equal to the IDHL value. The authors evaluated the effect of the presence of a large obstacle downwind of the pool (w obs = 48 m, h obs = 12 m) for different wind velocities.…”

Section: Resultsmentioning

confidence: 99%

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Heavy Gas Dispersion in Presence of Large Obstacles: Selection of Modeling Tools

Derudi

Bovolenta

Busini

et al. 2014

Ind. Eng. Chem. Res.

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A general criterion to foresee whether the presence of an obstacle on the cloud pattern can influence significantly the hazardous distance resulting from the dispersion of a heavy hazardous gas has been proposed. This criterion requires comparing the characteristic dimensions of the obstacles with those of the cloud in open field conditions on a suitable dimensionless space. It can be useful to discriminate between accidental scenarios that can be conservatively simulated using an integral model to that requiring CFD models, to identify which obstacles can be safely neglected when representing the real environment’s geometry in a computational domain without compromising the simulation reliability, and to estimate at a first glance the minimum size of a mitigation barriers able to induce a significant change in the hazardous distance.

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Section: Resultsmentioning

confidence: 99%

“…Results obtained applying the proposed methodology to various literature case studies involving a large LNG release in a regasification plant (full symbols) and an ammonia release from a water/ammonia pool (empty symbols).…”

Section: Results and Discussionmentioning

confidence: 99%

Heavy Gas Dispersion in Presence of Large Obstacles: Selection of Modeling Tools

Derudi

Bovolenta

Busini

et al. 2014

Ind. Eng. Chem. Res.

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“…Another relevant stream of research is evaluation of the consequences caused by a toxic gas release accident (e.g., Chakrabarti and Parikh 2011;Galeev et al 2013;Zhang and Chen 2010). Most consequence evaluation models are based on empirical gas dispersion models or CFD-based gas dispersion models.…”

Section: Literature Reviewmentioning

confidence: 99%

An integrated emergency response model for toxic gas release accidents based on cellular automata

Cao

Tian

et al. 2016

Ann Oper Res

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An integrated emergency response model based on cellular automata (CA) is proposed for the toxic gas release accidents that happen in the energy and chemical industry. This integrated emergency response model consists of three sub-models: a toxic gas dispersion model, a dynamic evaluation model for accident consequences, and an evacuation route selection model. When a toxic gas release accident happens, the dispersion model predicts the distribution of toxic gas concentration, the evaluation model estimates the consequences in terms of probability of death, expected fatalities and impact scope caused by the accident, and the route selection model provides the safest evacuation route for evacuees. The three sub-models run simultaneously and present real-time results. The proposed model is applied to an ammonia gas release accident in an energy and chemical enterprise, and the corresponding model results are discussed. The efficiency of emergency response for toxic gas release accidents can be further improved through the proposed integrated emergency response model based on CA.

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“…Recently, various scien tists (Galeev, 2013b;Mack et al, 2013;Pandya et al, 2012) have focused on free dispersion of toxic gas as a main concern of different industrial plants. Since am monia is a common substance, which has many uses owing to its chemical and physical properties, it is widely used in various applications (refrigerators, condensors).…”

Section: Introductionmentioning

confidence: 99%

“…An extensive research effort has been developed worldwide on the prediction and mitigation of acci dental loss of toxic gas (Vallero et al, 2015;Cheng et al, 2014;Jeong, 2014;Ng and Chau, 2014;Galeev, 2014Galeev, , 2013bKhan et al, 2000). Cheng et al (2014) used water curtain system to mitigate ammonia vapor cloud.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Ammonia Dispersion with Mesh Barrier under Various Atmospheric Stability Conditions

Gerdroodbary¹,

Mokhtari²,

Bishehsari³

et al. 2016

Asian J. Atmos. Environ

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In this study, the effects of the mesh barrier on the free dispersion of ammonia were numerically inves tigated under different atmospheric conditions. This study presents the detail and flow feature of the dispersion of ammonia through the mesh barrier on various free stream conditions to decline and limit the toxic danger of the ammonia. It is assumed that the dispersion of the ammonia occurred through the leakage in the pipeline. Parametric studies were con ducted on the performance of the mesh barrier by using the Reynoldsaveraged NavierStokes equa tions with realizable k-ε turbulence model. Numeri cal simulations of ammonia dispersion in the pres ence of mesh barrier revealed significant results in a fully turbulent free stream condition. The results clearly show that the flow behavior was found to be a direct result of mesh size and ammonia dispersion is highly influenced by these changes in flow pat terns in downstream. In fact, the flow regime be comes laminar as flow passes through mesh barrier. According to the results, the mesh barrier decreased the maximum concentration of the ammonia gas and limited the risk zone (more than 500 ppm) lower than 2 m height. Furthermore, a significant reduction occurs in the slope of the upper boundary of NH 3 risk zone distribution at downstream when a mesh barrier is presented. Thus, this device highly restricts the leak distribution of ammonia in the industrial plan.

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Consequence analysis of aqueous ammonia spill using computational fluid dynamics

Cited by 25 publications

References 23 publications

Heavy Gas Dispersion in Presence of Large Obstacles: Selection of Modeling Tools

Heavy Gas Dispersion in Presence of Large Obstacles: Selection of Modeling Tools

An integrated emergency response model for toxic gas release accidents based on cellular automata

Mitigation of Ammonia Dispersion with Mesh Barrier under Various Atmospheric Stability Conditions

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