摘要
分析评估LNG地面泄漏的危险性需要对其地面扩散和蒸发速率的变化进行准确预测。利用液体扩散的动力学模型和热传递模型,采用微分方法对LNG在连续性泄漏情况下液池扩散半径及蒸发速率随时间的变化关系进行研究,结果表明LNG蒸发速率先随时间线性增加到最大值,然后与时间的平方根成反比逐渐降低,并对实际泄漏情况下的泄漏速率、蒸发速率、液池扩散半径变化以及堤防中低温液体质量和液池厚度变化进行了准确计算。该研究结果对LNG地面泄漏事故发生后应急措施的采取和人员疏散等具有参考意义。
In order to analyze potential risk in LNG leakage on the ground, it is necessary to predict accurately spread and evaporation rate of LNG pool. Used are dynamical model and heat transfer model of liquid diffusion and applied is the differential method to predict the spreading radius and evaporation rate changes of liquid pool along with time. Results show that liquid pool evaporation rate will rise linearly up to the maximum value along with time and then drop inversely proportional to the square root of time. Accurately calculated are changes of leakage and evaporation rate and spread radius change of the liquid pool as well as changes of cryogenic liquid quality in dike and liquid pool thickness in actual leakage accident, which is useful reference for LNG leakage risk assessment, emergency response and personnel evacuation in case of leakage accident.
出处
《天然气与石油》
2014年第5期29-32,9,共4页
Natural Gas and Oil
基金
江苏省自然科学基金青年基金资助项目(SBK 201241828)
教育部博士点基金资助项目(20113221120010)
关键词
扩散
热传递
模型
蒸发速率
Spread
Heat transfer
Model
Evaporation rate
