超长电力隧道通风设计运行参数计算方法  

Determination Method for Ventilation Design and Operational Parameters in Extra-Long Power Tunnel

作　　者：王亮 汪雄平 成瑾 钟珂[2] Wang Liang;Wang Xiongping;Cheng Jin;Zhong Ke(Institute of Economy and Technology,State Grid Shanghai Electric Power Company,Shanghai 200030,P.R.China;College of Environmental Science and Engineering,Donghua University,Shanghai 201620,P.R.China)

机构地区：[1]上海隧道工程轨道交通设计研究院,上海200030 [2]东华大学环境科学与工程学院,上海201620

出　　处：《地下空间与工程学报》2024年第S01期213-219,共7页Chinese Journal of Underground Space and Engineering

摘　　要：为有效排除电缆发热量,超长电力隧道通风能耗巨大。实际运行中电缆大多数时候处于非饱和运行状态,故实际所需的通风量明显小于通风设计工况,因此存在很大的通风节能潜力。但是,由于缺乏理论支持,该节能措施难以落实。为此,本文针对超长隧道内部温度场进行数值模拟研究,探讨通风量、电缆发热强度和通风区段长度的相关性,建立了基于隧道出口气温不高于40℃限制条件下的运行参数关联式,可快速准确地预测已建成隧道实时所需通风量,也可用于隧道设计阶段参数计算。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.

关 键 词：电力电缆隧道 通风区段长度 节能 通风量 

分 类 号：TU91[建筑科学—建筑理论]