超长GIL管廊排热通风研究
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摘要
武汉谭鑫培路地下综合管廊GIL舱属于超长封闭的构筑物,排热通风问题成为该工程设计的控制性问题,特别是舱体与周围土体的传热问题。基于IDA隧道模拟软件建立GIL舱一维分析模型,对当前通风系统在夏季、冬季与过渡季节典型气候下的短期排热,以及1年、10年和30年考虑季节变化下的长期排热进行分析。短期分析结果表明,管廊坡度和温度梯度会降低某些区域的目标通风率,在设计中应引起重视。长期分析结果表明,舱内空气和壁面温度升高在运行的前5、6年最为显著,并在30年的剩余时间内保持稳定,舱壁与周围土体释放10%～40%的热量。基于计算流体力学软件OpenFOAM建立GIL舱三维节段模型,分析电缆和支架对舱内温度场与速度场的影响,揭示GIL舱内速度分布的不均匀性与烟囱效应对温度分布的影响。
The GIL chamber in the utility tunnel under Tanxinpei Road in Wuhan is an ultra-long closed structure. Heat exhaust ventilation is the controlling problem in engineering design for the project, especially the heat transfer between the tunnel and the surrounding soil in the long term. A one-dimensional model for the GIL chamber is established by using the IDA tunnel simulation software to analyze the short-term and long-term heat exhaust, respectively. The short-term heat exhaust is analyzed for the typical climate of summer/winter/transitional seasons and the long-term analysis is carried out under the seasonal changes in 1 year/10 years/30 years. The short-term analysis results indicate that the slope of the utility tunnel and the temperature gradient lead to lower ventilation efficiency in certain areas. The long-term analysis results show that the air temperature in the GIL chamber and the wall temperature rise most pronouncedly during the first 5-6 years of operation and remain stable for the remaining time within 30 years. It also is found that around 10%-40% of the heat is released to the surrounding soil. A three-dimensional model of the GIL chamber is established using the fluid mechanics-based program, OpenFOAM, for 3 D simulation. The effects of cables and brackets on the temperature and velocity fields in the chamber are analyzed. The effect of non-uniformity of velocity distribution and the stack effect on the temperature distribution in the GIL chamber are revealed. The results can provide some reference for the design and specification revision of heat exhaust ventilation for similar utility tunnels in the future.
The GIL chamber in the utility tunnel under Tanxinpei Road in Wuhan is an ultra-long closed structure. Heat exhaust ventilation is the controlling problem in engineering design for the project, especially the heat transfer between the tunnel and the surrounding soil in the long term. A one-dimensional model for the GIL chamber is established by using the IDA tunnel simulation software to analyze the short-term and long-term heat exhaust, respectively. The short-term heat exhaust is analyzed for the typical climate of summer/winter/transitional seasons and the long-term analysis is carried out under the seasonal changes in 1 year/10 years/30 years. The short-term analysis results indicate that the slope of the utility tunnel and the temperature gradient lead to lower ventilation efficiency in certain areas. The long-term analysis results show that the air temperature in the GIL chamber and the wall temperature rise most pronouncedly during the first 5-6 years of operation and remain stable for the remaining time within 30 years. It also is found that around 10%-40% of the heat is released to the surrounding soil. A three-dimensional model of the GIL chamber is established using the fluid mechanics-based program, OpenFOAM, for 3 D simulation. The effects of cables and brackets on the temperature and velocity fields in the chamber are analyzed. The effect of non-uniformity of velocity distribution and the stack effect on the temperature distribution in the GIL chamber are revealed. The results can provide some reference for the design and specification revision of heat exhaust ventilation for similar utility tunnels in the future.
引文
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[2] 刘应明.城市地下综合管廊工程规划与管理[M].北京:中国建筑工业出版社,2016.LIU Yingming.Planning and management of urban underground utility tunnel [M].Beijing:China Architecture & Building Press,2016.
[3] 王恒栋.我国城市地下综合管廊工程建设中的若干问题 [J].隧道建设,2017,37(5):523.WANG Hengdong.Several problems about urban underground utility tunnel during construction in China [J].Tunnel Construction,2017,37 (5):523.
[4] 高彪.城市地下综合管廊通风系统设计探讨[J].建筑热能通风空调,2018,37(4):76.GAO Biao.Discussion on ventilation system design for utility tunnel [J].Building Energy & Environment,2018,37(4):76.
[5] 董志周,许建华,王斌,等.长距离大断面电力电缆隧道通风设计探讨[J].华东电力,2009,37(11):1909.DONG Zhizhou,XU Jianhua,WANG Bin,et al.Discussion on ventilation design for tunnels of long-distance and large-section cables [J].East China Electric Power,2009,37(11):1909.
[6] 苗妤,冯炼,袁艳平.某市域线地下隧道通风设置优化研究[J].制冷与空调,2016,30(4):472.MIAO Yu,FENG Lian,YUAN Yanping.An optimization study on one city regional rail′s ventilation system [J].Refrigeration & Air Conditioning,2016,30(4):472.
[7] TAN Lili,LOVE James.A literature review on heating of ventilation air with large diameter earth tubes in cold climates [J].Energies,2013,6:3734.
[8] RYMAROV A G,DAVIDSSON H.Analysis of heat losses in underground tunnels for preheating of ventilation air [J].International Journal of Civil Engineering and Technology,2017,8(11):1172.
[9] 城市综合管廊工程技术规范:GB 50838—2015[S].北京:中国计划出版社,2015.Technical code for urban utility tunnel engineering:GB 50838-2015[S].Beijing:China Planning Press,2015.
[10] 王固萍,韩晔,孟毓.上海世博会电力电缆隧道的长期温度预测[J].特种结构,2009,26(6):11.WANG Guping,HAN Ye,MENG Yu.Long-term temperature forecast for power cable tunnel at Shanghai world expo [J].Special Structures,2009,26(6):11.
[11] 郭孝峰,夏再忠,吴静怡,等.埋地管道温度特性数值模拟与相似性实验研究[J].太阳能学报,2010,31(6):727.GUO Xiaofeng,XIA Zaizhong,WU Jingyi,et al.Numerical analysis and similarity experiment on temperature field of underground pipe [J].Acta Energiae Solaris Sinica,2010,31(6):727.
[12] 曾昌,姚志刚,范建国,等.公路隧道巷道式施工通风瓦斯分布研究[J].隧道建设,2016,36(7):837.ZENG Chang,YAO Zhigang,FAN Jianguo,et al.Study of gas distribution of highway tunnel using gallery ventilation [J].Tunnel Construction,2016,36(7):837.
[13] 陆耀庆.实用供热空调设计手册[M].北京:中国建筑工业出版社,2008.LU Yaoqing.Practical design handbook for heating and air conditioning [M].Beijing:China Architecture & Building Press,2008.
[14] 工业建筑供暖通风和空气调节设计规范:GB 50019—2015 [S].北京:中国计划出版社,2015.Design code for heating ventilation and air conditioning of industrial buildings:GB 50019-2015 [S].Beijing:China Planning Press,2015.
[15] 民用建筑供暖通风与空气调节设计规范:GB 50736—2012 [S].北京:中国建筑工业出版社,2012.Design code for heating ventilation and air conditioning of civil buildings:GB 50736-2012 [S].Beijing:China Architecture & Building Press,2012.
[16] MOUKALLED F,MANGANI L,DARWISH M.The finite volume method in computational fluid dynamics:an advanced introduction with OpenFOAM and Matlab [M/OL].Switzerland:Springer,2016[2019-04-20].https://www.springer.com/us/book/9783319168739.