To effectively eliminate the heat generated by cables, extensive energy consumption of ventilation is required in extra-long power tunnels (ELPT). In practice, due to cables being under part-load conditions, the demanded volume airflow rate is significantly less than that of the design value, and this makes it possible to achieve energy savings by reducing the volume airflow rate. However, it is difficult to implement due to the lack of a theoretical basis and data support. Therefore, a numerical simulation was conducted to study the effect of ventilation volume airflow rate and cable dissipation intensity on the temperature distribution in the ELPT, and the correlation between these two factors and ventilation shaft spacing was explored. Moreover, to prevent the air temperature in the tunnel from exceeding 40 ℃, a prediction model was developed for determining the ventilation volume airflow rate by employing the statistical regression analysis of the numerical results. The present model provided a simple and accurate calculation method for the design and operation of the ELPT, which helps designers quickly determine the parameters.
Wang Liang
,
Wang Xiongping
,
Cheng Jin
,
Zhong Ke
. Determination Method for Ventilation Design and Operational Parameters in Extra-Long Power Tunnel[J]. Chinese Journal of Underground Space and Engineering, 2024
, 20(S1)
: 213
-219
.
DOI: 10.20174/j.JUSE.2024.S1.26
[1] 中华人民共和国住房和城乡建设部. 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.
[2] 中华人民共和国建设部. 电力工程电缆设计规范(GB50217—2018)[S]. 北京:中国电力企业联合会, 2018.
[3] 王亮. 苏锡常太湖隧道通风设计分析 [J]. 隧道与轨道交通, 2020 (1): 43-46,69-70.
[4] 蔡增基, 龙天渝. 流体力学泵与风机 [M]. 北京:中国建筑工业出版社, 2009.
[5] 赵淑云,程学友,朱祝龙,等.长大地铁区间隧道双压通风模型实验与模拟[J].地下空间与工程学报,2021,17(增1):101-107.
[6] 王星,任博,王永东,等.长大双洞公路隧道联络通道间距设置研究[J].地下空间与工程学报,2020,16(4):1142-1152.
[7] 杨帅,任锐,王庭川,等.长大隧道风仓式施工通风结构参数优化研究[J].地下空间与工程学报,2023,19(3):946-954.
[8] 丛北华,韩新,干思诗,等.超长地铁区间隧道高压细水雾试验与应用研究[J].地下空间与工程学报,2021,17(3):706-711.
[9] 郭志杰,孙涛,张灿程,等.高海拔超长隧道通风烟雾、CO基准排放量折减率取值建议[J].地下空间与工程学报,2020,16(增1):341-345.
[10] Weedy B M, El Zayyat H M. The current carrying capacity of power cables in tunnels[J]. IEEE Transactions on Power Apparatus and Systems, 2007, PAS-92(1): 298-307.
[11] Mathur S R, Murthy J Y. Coupled ordinates method for multigrid acceleration of radiation calculations[J]. Journal of Thermophysics and Heat Transfer, 1999, 13(4): 467.
[12] Liu K, Huang Y T, Li H Z, et al. Study on ventilation scheme of electric GIL integrated pipe gallery crossing Yangtze river[J]. IOP Conference Series: Earth and Environmental Science, 2019, 242(2):022064.
[13] 郭孝峰. 埋地电力隧道温度特性的数值模拟与试验研究 [D]. 上海: 上海交通大学, 2010.
[14] 彭金龙,吴炜.城市电缆隧道发热量及通风量的计算分析[J].铁道标准设计,2010(增2):70-73.
[15] 李晓昭,熊志勇,乔恒君,等.地铁隧道围岩传热规律的监测分析[J].地下空间与工程学报,2012,8(1):105-110.
[16] 游智敏, 李海. 上海电力隧道及运行管理[A] //中国电力企业联合会编. 全国第八次电力电缆运行经验交流会议文集[C]. 杭州, 2008: 305-314.
[17] 刘丹,谢锋.工程类比法确定重庆朝天门两江隧道最小覆盖层厚度[J].公路交通技术,2010(4):92-95.
[18] Sun T T, Luo Z W, Chay T. An analytical model to predict the temperature in subway-tunnels by coupling thermal mass and ventilation[J]. Journal of Building Engineering, 2021, 44:102564.
[19] Wang S H, Kang Y M, Yang Z, et al. Numerical study on dynamic thermal characteristics and optimum configuration of internal walls for intermittently heated rooms with different heating durations[J]. Applied Thermal Engineering, 2019, 155: 437-448.
