城市管廊中电缆线路运行热环境研究

Study on the Thermal Environment of Cable Operation in Urban Corridors

根据传热学对电缆温度场进行分析,通过建立数值模型求解电缆温度场载流量。文中建立电缆温度场的几何模型并给出相关电缆参数,通过计算电缆温度场和载流量,分析不同因素对电缆载流量的影响。文中还介绍了隧道通风方式及其优缺点,阐述了电缆隧道的通风方式、风速、风量的选择以及通风系统的运行控制方法。结果表明电缆的温度场和载流量与电缆沟的结构和沟内电缆的布置方式有很大的关系。通过对电缆隧道和通风系统的合理设计有利于提高电缆的温度场和载流量。

The temperature field of the power cable is analyzed according to heat transfer, and the numerical model is established to solve the current-carrying capacity. In this paper, the geometric model of the cable temperature field is established and the relevant cable parameters are given. The influence of different factors on the cable carrying capacity is analyzed by calculating the temperature field and the carrying capacity of the cable. In addition, the paper also introduces the tunnel ventilation and its advantages and disadvantages, expounds the cable tunnel ventilation, wind speed, air volume selection and ventilation system operation control method. The results show that the temperature field and the carrying capacity of the cable are related to the structure of the cable trench and the arrangement of the cable in the groove.Through the cable tunnel and ventilation system reasonable design is conducive to improving the cable temperature field and current carrying capacity.