利用太阳能烟囱的公路隧道自然通风数值模拟与研究

发布时间：2018-05-10 23:19

本文选题：公路隧道 + 自然通风　；参考：《长安大学》2015年硕士论文

【摘要】：公路隧道通风系统的巨大耗电量,使通风节能问题越来越为人们所关注,公路隧道的自然通风也一直是公路隧道领域的重点课题之一。太阳能烟囱作为一种热压作用下的自然通风设备,利用太阳辐射,将热能转化为空气的动能,从而起到通风换气的作用。本文将公路隧道自然通风与太阳能烟囱结合,对用于隧道通风的太阳能烟囱通风效果进行了研究。首先提出了一种利用太阳能烟囱实现公路隧道通风的结构形式,它由太阳能烟囱结合竖井构成,可以借助太阳能加强公路隧道自然通风效果。其次,推导出了通风阻力和超静压差存在的情况下,太阳能烟囱通风量与尺寸参数的数学公式,并利用计算机流体仿真进行了不同尺寸下的太阳能烟囱数值模拟。模拟结果表明:集热棚长度为50-200m的太阳能烟囱能够产生与自然风通风阻力大致相等的负压。同时经过对比,验证了上述公式。最后在雷家坡一号隧道设置了太阳能烟囱自然通风系统,通过实测数据分析,并结合数值模拟,表明该系统取得了较好的自然通风效果。研究表明太阳能烟囱能将纯自然通风条件下竖井原有的通风量提升约一倍;并且在不利时间段,使用太阳能烟囱产生的负压能够抵消隧道自然通风阻力。并提出了改进方案,改进后太阳能烟囱能提升约25%-35%的通风量。太阳能烟囱通风技术适用于太阳能资源丰富的隧道,极大地提高了公路隧道自然通风的效果,它的推广使用有助于进一步实现公路隧道节能减排的目标。
[Abstract]:Because of the huge power consumption of highway tunnel ventilation system, people pay more and more attention to the problem of ventilation energy saving. The natural ventilation of highway tunnel has been one of the key topics in the field of highway tunnel. Solar chimney, as a kind of natural ventilation equipment under hot pressure, uses solar radiation to convert heat energy into kinetic energy of air, thus it plays the role of ventilation and ventilation. In this paper, natural ventilation of highway tunnel and solar chimney are combined to study the ventilation effect of solar chimney for tunnel ventilation. In this paper, a new structure of highway tunnel ventilation using solar energy chimney is put forward, which is composed of solar chimney and shaft, which can enhance the natural ventilation effect of highway tunnel by solar energy. Secondly, the mathematical formulas of ventilation and dimension parameters of solar chimney under the condition of ventilation resistance and overstatic pressure difference are derived, and the numerical simulation of solar chimney with different sizes is carried out by computer fluid simulation. The simulation results show that the solar chimney with the length of 50-200 m can produce negative pressure which is about equal to the ventilation resistance of natural wind. At the same time, the above formula is verified by comparison. Finally, the natural ventilation system of solar chimney is set up in the No.1 tunnel of Leijiapo. Through the analysis of the measured data and the numerical simulation, it is shown that the system has achieved better natural ventilation effect. The study shows that solar chimney can double the original ventilation of shaft under pure natural ventilation, and that the negative pressure generated by solar chimney can offset the natural ventilation resistance of tunnel in unfavorable time. The improved solar chimney can increase the ventilation by about 25-35%. Solar chimney ventilation technology is suitable for tunnels with abundant solar energy resources, which greatly improves the effect of natural ventilation in highway tunnels. Its popularization and use will help to achieve the goal of energy saving and emission reduction in highway tunnels.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U453.5

【共引文献】