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运用DNV PHAST软件模拟世界首艘商业用途压缩天然气(CNG)运输船装卸载过程中气体泄漏的扩散过程,对CNG运输船装卸载过程中气体泄漏发生喷射火、闪火、蒸气云爆炸等事故后果进行评价,选取最危险的工况对事故开展模拟,定量分析火灾的热辐射影响范围和爆炸冲击波的超压影响范围。通过对CNG运输船开展气体泄露评估,为该船后续的风险评估提供基础数据。同时,针对模拟结果,提出一些CNG运输船舶装卸货物时的预防措施,进而提高CNG运输船的安全性和运行可靠性。
Using DNV PHAST software to simulate the diffusion process of gas leakage in the loading and unloading process of the world’s first commercial CNG carrier, the accidental consequences of jet fire, flash fire and steam cloud explosion on gas leakage during loading and unloading of CNG carrier The most dangerous conditions are selected to simulate the accident and quantitatively analyze the influence range of the thermal radiation and the impact range of the overpressure of the blast shock wave. CNG carrier gas leak assessment conducted by the ship for the subsequent risk assessment to provide basic data. At the same time, according to the simulation results, some preventive measures are proposed when loading and unloading CNG carriers, which will further improve the safety and operational reliability of the CNG carrier.