| 孟德雨,王汉青,李铖骏.地下车库氡迁移的数值模拟研究[J].装备环境工程,2021,18(4):96-102. MENG De-yu,WANG Han-qing,LI Cheng-jun.Research on Numerical Simulation of Radon Distribution in Underground Garage[J].Equipment Environmental Engineering,2021,18(4):96-102. |
| 地下车库氡迁移的数值模拟研究 |
| Research on Numerical Simulation of Radon Distribution in Underground Garage |
| 投稿时间：2020-09-29 修订日期：2020-10-27 |
| DOI：10.7643/issn.1672-9242.2021.04.014 |
| 中文关键词: 氡浓度 地下车库 室内温度 数值模拟中图分类号:X820 文献标识码:A 文章编号:1672-9242(2021)04-0096-07 |
| 英文关键词:radon concentration underground garage indoor temperature numerical simulation |
| 基金项目:国家自然科学基金资助项目(11575080) |
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| 中文摘要: |
| 目的 研究地下车库氡浓度分布，提出改善地下车库氡控制的建议。方法 计算地下车库壁面的氡析出率，建立地下车库的几何模型，采用CFD数值模拟的方法研究室内温度、换气次数以及气流组织形式对室内氡浓度分布的影响。结果 平均氡浓度水平在室内温度为5 ℃时均处于最低值，在温度为35 ℃时均处在最高值，反映出温度的升高将削弱通风排氡的效果。当换气次数为1 AC/h时，室内氡浓度已经符合规范上的要求，因此对于采用机械通风的情形，当室内换气次数超过1 AC/h时，基本可以认为已经具备足够的排氡的能力。结论 提高换气次数可以显著降低室内氡的浓度，除此之外，采用合理的气流组织形式，让气流充分穿越工作区也是提高排氡效率的可行方法。 |
| 英文摘要: |
| The paper aims to research on the concentration distribution of radon in underground garages, and puts forward some suggestions to improve the control of radon in underground garages. By calculating radon exhalation rate of underground garages and establishing the geometric model, numerical simulation are conducted to evaluate the effect of indoor temperature, air change rate and air distribution on indoor radon concentration. The result shows that the average radon concentration level is at the lowest value when the indoor temperature is 5 ℃, and at the highest value when the temperature is 35 ℃, reflecting that the increase of temperature can weaken the effect of ventilation and radon exhaust. When the number of ventilation is 1 AC/H, the indoor radon concentration has met the requirements of the specification. Therefore, in the case of mechanical ventilation, when the number of indoor ventilation exceeds 1 AC/H, it can be considered that the indoor radon exhaust capacity is sufficient. Besides, a feasible method for improving radon removal efficiency of ventilation is adopting reasonable air organization to ensure air flowing through the workspace. |
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