关键词: 氢气罐区, 安全放散塔, 放散高度, 热辐射, 热辐射强度, 敏感性分析

Abstract: The safe vent system is an important part of the safety design of the hydrogen tank area. With the increase of the scale of the domestic hydrogen energy industry and the scale of hydrogen storage and transportation, the design of the safe vent system is particularly important in the storage and transportation of large-volume and medium-high pressure hydrogen. At present, there is a dispute in the design standards of domestic hydrogen storage and transportation facilities regarding the design of the vent height of the large-scale hydrogen vent system. Based on the literature research on the existing domestic and foreign standards, this paper summarizes the calculation formula of the vent height that can meet the vent requirements of the main domestic and international design standards. Based on the calculation formula of the vent height and using tools such as Flaresim 5.0, the vent height design calculation is carried out using the large-scale hydrogen tank area release system of a 10,000-ton green hydrogen project in Northwest China as an example. The calculation results show that it is necessary to carry out thermal radiation calculation and verification for the large-scale hydrogen vent system. The conventional 5m vent tower for large-scale hydrogen vent has design hazards that threaten personal and equipment safety. Appropriately increasing the vent height can greatly reduce the intensity of thermal radiation to personal activity areas. At the same time, based on the calculation results, a lookup table for the vent height of hydrogen is proposed for rough checking of personal or equipment safety.

Key words: hydrogen tank group, safety vent system, release height, thermal radiation, thermal radiation intensity, sensitivity analysis