Abstract:

Liquid hydrogen receiving terminal (LHRT) is exposed to great hydrogen-leakage threat due to the frequent operation and complex components. The evaluation of the consequences resulting from a potential liquid hydrogen leakage is therefore essential. Numerical simulation of liquid hydrogen leakage based on a pseudo-source model was conducted at the operational Kobe LHRT in Japan. The effects of leakage apertures and wind speed and direction on the consequences of accidents under the current station structure were assessed in terms of both dispersion and explosive overpressure hazards. The results show that larger leakage apertures, lower wind speeds and the presence of larger obstacles in the downwind direction all cause the hydrogen cloud to build up to a larger volume and produce a larger peak explosive overpressure. The maximum explosive overpressures are all above 0.13790 bar, which would cause moderate damage to the building and moderate injury to personnel. The overpressures in the control room are all below 0.06895 bar and within safe limits.

Key words: liquid hydrogen, diffusion, explosion, overpressure, liquid hydrogen receiving terminal

摘要：

液氢接收终端运行频繁，部件复杂，存在较大的漏氢威胁。因此，对潜在液氢泄漏造成的后果进行评估是必不可少的。基于伪源模型对日本神户液氢接收终端的液氢泄漏进行了数值模拟。从扩散和爆炸超压危害两方面评估了当前终端布局下泄漏孔径及风速风向对事故后果的影响。结果表明，较大的泄漏孔径、较低的风速、沿着顺风方向存在较大型障碍物均会使氢气云体积积累得更大，亦会造成更大的爆炸超压峰值。常见工况下全局最大爆炸超压均高于0.13790 bar（1 bar=0.1 MPa），会造成房屋的中度损坏和人员的中度损伤，不过控制室处的超压均小于0.06895 bar，在安全范围内。

关键词: 液氢, 扩散, 爆炸, 超压, 液氢接收终端