Guangwei Zhang , Ziying An , Xiaoping Liu , Xiaoping Li
{"title":"Consequence analysis of accidental gas leak from storage tank group using LES method","authors":"Guangwei Zhang , Ziying An , Xiaoping Liu , Xiaoping Li","doi":"10.1016/j.jlp.2024.105529","DOIUrl":null,"url":null,"abstract":"<div><div>Hazardous clouds and toxic zones resulting from gas leaks from storage tanks in chemical plants present immediate threats to environmental health and industrial process safety. However, the fluctuation characteristics and fluctuation-induced consequence variations received limited attention. This study employed the large-eddy simulation (LES) to address the time-averaged and dynamic characteristics of consequences associated with gas leaks from a tank group, focusing on the impacts of leak locations and wind directions. Four metrics were introduced to quantify consequences: volumes of flammable and toxic gas clouds (V<sub>F</sub>, V<sub>T</sub>), toxic zone area (A<sub>T</sub>) and toxic dose for population (TD). The results indicated that the Reynolds-averaged Navier–Stokes model (RANS) markedly overestimated the mean values of these metrics compared to LES, with the prediction of AT even increased by 147.5%. The leeward leak from the rear-row tank presented the highest mean and peak values. Both the peak and mean values were generally higher when the wind direction (<span><math><mrow><mi>θ</mi></mrow></math></span>) was 0°, except for TD. Moreover, AT and TD were significantly impacted by pulsating flow, with fluctuation-induced components generally reaching 30%–40%. When <span><math><mrow><mi>θ</mi><mo>≤</mo><mrow><mn>0</mn><mo>°</mo></mrow></mrow></math></span>, A<sub>T</sub> was primarily influenced by pulsating flow rather than mean flow. The results provide guidance for the design of chemical industrial parks, ensuring the industrial processes safety and refining emergency response strategies.</div></div>","PeriodicalId":16291,"journal":{"name":"Journal of Loss Prevention in The Process Industries","volume":"94 ","pages":"Article 105529"},"PeriodicalIF":3.6000,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Loss Prevention in The Process Industries","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0950423024002870","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Hazardous clouds and toxic zones resulting from gas leaks from storage tanks in chemical plants present immediate threats to environmental health and industrial process safety. However, the fluctuation characteristics and fluctuation-induced consequence variations received limited attention. This study employed the large-eddy simulation (LES) to address the time-averaged and dynamic characteristics of consequences associated with gas leaks from a tank group, focusing on the impacts of leak locations and wind directions. Four metrics were introduced to quantify consequences: volumes of flammable and toxic gas clouds (VF, VT), toxic zone area (AT) and toxic dose for population (TD). The results indicated that the Reynolds-averaged Navier–Stokes model (RANS) markedly overestimated the mean values of these metrics compared to LES, with the prediction of AT even increased by 147.5%. The leeward leak from the rear-row tank presented the highest mean and peak values. Both the peak and mean values were generally higher when the wind direction () was 0°, except for TD. Moreover, AT and TD were significantly impacted by pulsating flow, with fluctuation-induced components generally reaching 30%–40%. When , AT was primarily influenced by pulsating flow rather than mean flow. The results provide guidance for the design of chemical industrial parks, ensuring the industrial processes safety and refining emergency response strategies.
期刊介绍:
The broad scope of the journal is process safety. Process safety is defined as the prevention and mitigation of process-related injuries and damage arising from process incidents involving fire, explosion and toxic release. Such undesired events occur in the process industries during the use, storage, manufacture, handling, and transportation of highly hazardous chemicals.