基于负荷电流的综合管廊电缆发热量计算  

Calculation of cable calorific value for utility tunnels based on load current

作　　者：庄璐 叶黎明 尹力文[1] 郑月敏 张娟 徐昌鹏 Zhuang Lu;Ye Liming;Yin Liwen;Zheng Yuemin;Zhang Juan;Xu Changpeng(MCC Capital Engineering&Research Incorporation Limited,Beijing;Nankai University,Tianjin)

机构地区：[1]中冶京诚工程技术有限公司,北京 [2]南开大学,天津

出　　处：《暖通空调》2024年第5期67-71,116,共6页Heating Ventilating & Air Conditioning

基　　金：北京市基础设施投资有限公司科研项目“一线城市中心老旧城区小型集约化管廊解决方案研究”(编号:2020-FZH-01);天津市研究生科研创新项目(编号:2021YJSB084)。

摘　　要：综合管廊属于密闭型地下构筑物,廊内敷设的电缆是主要的发热源。准确估计入廊电缆的发热量有助于通风设备的合理选择和工艺的科学设计,避免造成资源和成本的浪费。本文提出了基于负荷电流的电缆发热量计算方法,通过对出变电站母线段电缆进行分析,得到了更为精确的电缆负荷电流。通过计算可知,使用负荷电流进行电缆发热量计算得到的结果比使用载流量进行电缆发热量计算的结果更为准确,且明显减小,可以实现在满足规范要求和功能需要的前提下降低能耗、节约成本。The utility tunnel is a closed underground structure,and the cables laid in the utility tunnel are the main heat source.Accurate estimation of the calorific value of the tunnel cable is helpful for the reasonable selection of ventilation equipment and the scientific design of the process,so as to avoid the waste of resources and costs.In this paper,a calculation method of cable calorific value based on load current is proposed,and a more accurate cable load current is obtained by analysing the cable of the bus section of the substation.Through the calculation,it can be seen that the results obtained by using the load current for cable calorific value calculation are more accurate than the results of the cable calorific value calculation using the ampacity,and the results are significantly reduced,which can reduce energy consumption and save cost under the premise of meeting specification requirements and functional needs.

关 键 词：电缆 发热量 综合管廊 负荷电流 载流量 管廊温度 

分 类 号：TU990.3[建筑科学—市政工程]