高原建筑室内工作点位个性化供氧关键参数研究

Study on key parameters of personalized oxygen supply at indoor working points of plateau buildings

青藏高原地区空气稀薄、极度缺氧,为人们供氧已成为保障人体心理与身体健康的迫切需求。基于此,本文针对高原建筑室内工作点位提出了个性化供氧策略,通过数值模拟,分析了不同因素影响下工作点位的氧扩散过程。结果表明,风口位置、送风速度及供氧浓度对呼吸区氧气浓度场的分布有显著影响,供氧风口高度不宜低于人体呼吸区高度,风口格栅向上倾斜30°~40°时供氧效果较好,送风速度在0.3~0.4 m/s时较为合适,供氧体积分数在28.1%~31.7%时可满足氧需求。综合以上因素,研究给出了个性化供氧关键参数取值范围,为高原低气压环境下高效供氧方案及参数选择提供参考。

The air in the Qinghai-Tibet Plateau is thin and extremely anoxic.It has become an urgent need to provide oxygen for people to ensure their mental and physical health.Based on this,this paper puts forward the strategy of personalized oxygen supply in view of the indoor working point of the plateau buildings.Through numerical simulation,the oxygen diffusion process of the working point under the influence of different factors is analysed.The results show that the air supply outlet position,the air supply velocity and the oxygen supply concentration have a significant effect on the distribution of the oxygen concentration field in the breathing area.The height of the oxygen supply outlet should not be lower than the height of the human breathing area.The oxygen supply effect is better when the air supply outlet grille is tilted upward from 30°to 40°,and the air supply velocity is more appropriate when it is 0.3-0.4 m/s.The oxygen demand can be satisfied when the oxygen supply volume fraction is from 28.1%to 31.7%.Based on the above factors,the value range of the key parameters of personalized oxygen supply is given,which provides a reference for the efficient oxygen supply scheme and parameter selection under the plateau and low air pressure environment.