文献类型：期刊文献

英文题名：A new real-gas model to characterize and predict gas leakage for high-pressure gas pipeline

作者：Yuan, Fang[1]; Zeng, Yan[2]; Khoo, Boo Cheong[3]

机构：[1] School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] National Metrology Centre, 2 Fusionopolis Way, 138634, Singapore; [3] Department of Mechanical Engineering, National University of Singapore, 117575, Singapore

年份：2022

卷号：74

外文期刊名：Journal of Loss Prevention in the Process Industries

收录：EI(收录号：20214111000003)

语种：英文

外文关键词：Gas dynamics - High pressure effects - Compressibility of gases - Gas compressors - Thermodynamics - Gases - Risk assessment - Software testing

摘要：High-pressure gas pipe leakage is a topic of great concern in the risk assessment and safety management of pipeline systems. Traditional ideal-gas models with the assumption of fully ruptured leak loss are valid for a large leak hole in low-pressure gas pipelines (3–14 bar). This paper developed a new model for small leaks in high-pressure gas pipelines, which improves the traditional models in two aspects: the introduction of a mass fraction to characterize the proportion of leaked gas flow to in-pipe gas flow, and the integration of the real-gas thermodynamics into the fundamental governing equations to include the gas compressibility factor in the high-pressure conditions (>14 bar). To examine the validity and practicality of the new real-gas model, comprehensive comparison tests were carried out with the results of the benchmark numerical simulations and the hazard modelling software ALOHA, respectively. In the light of prediction accuracy, the new real-gas model shows its advantage over the traditional ideal-gas model, the improved ideal-gas model, and the semi-empirical correlation proposed by previous research. The virtues of high accuracy and short computational time confirmed the effectiveness of the new real-gas model in the responsive evaluation of high-pressure gas pipe leakage with small leak holes. ? Elsevier Ltd