考虑地下水渗流与空气流动的能源隧道换热性能及热变形
PDF下载 (145)余淑琳,岑夺丰,夏才初.考虑地下水渗流与空气流动的能源隧道换热性能及热变形[J].宁波大学学报(理工版),2025,38(5):54-63.DOI:10.20098/j.cnki.1001-5132.2025.0211
YU Shulin,CEN Duofeng,XIA Caichu.Heat exchange performance and thermal deformation of
energy tunnels considering groundwater seepage and air flow
[J].Journal of Ningbo University(Natural Science & Engineering Edition),2025,38(5):54-63.DOI:10.20098/j.cnki.1001-5132.2025.0211
| Title: | Heat exchange performance and thermal deformation of
energy tunnels considering groundwater seepage and air flow |
| 作者: | 余淑琳, 岑夺丰, 夏才初 |
| Author(s): | YU Shulin, CEN Duofeng, XIA Caichu |
| 关键词: | 能源隧道; 换热性能; 热变形; 渗流; 空气流速 |
| Keywords: | energy tunnel; heat exchange performance; thermal deformation; seepage; air velocity |
| 分类号: | U459.9 |
| DOI: | 10.20098/j.cnki.1001-5132.2025.0211 |
| 文献标识码: | A |
| 摘要: | 为研究地下水渗流和空气流动对能源隧道换热性能的影响及由此可能引起的热变形，以德国Stuttgart-Fasanenhof能源隧道为原型，建立了考虑地下水渗流与隧道内空气流动的热互馈作用的耦合数值模型。针对不同地下水渗流方向和流速以及不同空气流速，采用有限元法模拟分析隧道换热器出水口温度、换热功率、隧道空气和周围地层的温度场及隧道变形特征。结果表明：渗流方向与隧道走向垂直时，在渗流速度0.05~1.00m/d范围，运行60d后换热功率升高50%；渗流方向与隧道走向同向时，流速越大，换热效率越低，在渗流速度0.05~1.00m/d范围，运行60d后换热功率下降37%。空气流速增大对换热效率起促进作用，但增大到一定程度后影响不再明显。渗流速度的增加对热变形引起的隧道位移在竖直方向影响较小，在水平方向几乎无影响；渗流速度在0.05~1.00m/d范围，换热系统运行60d，隧道整体的竖直位移为0.05~ 0.20mm。研究成果为能源隧道的合理设计提供了理论参考。 |
| Abstract: | In order to study the effects of groundwater seepage and air flow on heat exchange performance of energy tunnels and the possible thermal deformation caused by them, a coupled numerical model considering the thermal interaction between groundwater seepage and air flow in the tunnels was established by taking the Stuttgart-Fasanenhof energy tunnel in Germany as a prototype. In light of different groundwater seepage directions and velocities and different air velocities, the temperature of the outlet of the tunnel heat exchanger, the heat exchange power, the temperature field of the tunnel air and the surrounding ground, and the deformation characteristics of the tunnel were simulated and analyzed. The results show that when the seepage direction is perpendicular to the tunnel trend, the larger the seepage velocity, the stronger the ground heat dissipation, and the higher the heat exchange efficiency. When the seepage direction is in the same direction as the tunnel, the larger the seepage velocity, the lower the heat exchange efficiency, but the effect is not significant. The increase of air velocity plays a role in promoting the heat exchange efficiency, but the effect is no longer significant after it being increased to a certain extent. The increase of seepage velocity has little effect on the tunnel displacement caused by thermal deformation in the vertical direction, and almost no effect in the horizontal direction. The results of this study can provide a theoretical reference for the rational design of energy tunnels. |
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| 备注/Memo: | 收稿日期: 2025−02−25 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ 基金项目: 浙江省自然科学基金重点项目（LZ22E080008）；宁波市自然科学基金（2024J091） 第一作者: 余淑琳，硕士研究生，主要研究方向为能源隧道。E-mail: yushulinnbu@163.com *通信作者: 岑夺丰，副研究员，主要研究方向为能源地下结构。E-mail: cdfschool@126.com 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
