电缆群直埋敷设散热的试验研究

采用带有内热源的镀铬抛光铜管(发热管)来模拟电缆群,试验采用多点温度测量仪记录发热管在直埋敷设时所加电压和相应的发热管的温度,通过对改变加在发热管上的电压对应的发热管温度进行分析,并与计算结果进行比较,得到其温度随电压增大而升高的规律,温度场实测结果与程序计算结果对比具有较高的一致性。为进一步研究直埋敷设在地下的电缆的温度和电压之间的关系和实际的电缆安全运行提供了数据。

An Experimental Investigation on the Heat Dissipation of the Underground Cable Group

An experimental investigation was made to study the heat dissipation of an electric power cable group. The electric cable group was simulated by six polished, chromium-plated copper tubes with a heater (such tubes are referred to by the authors as "heater bars").Multipoint temperature admeasuring apparatus was also be used. Analysis of the temperature on the heater bars was done by changing the voltage applied on the heater bars comparing with calculation. The result indicates that the temperature increases with the voltage, and it is similar to the calculate result. The further study on the relation between the temperature and voltage of the electric underground cables provides a guide for the optimal arrangement of the cable.