水平直流接地极暂态温度场分析

为分析水平直流接地极温升特性,采用ANSYS软件建立了长9m的水平电极电热耦合动态模型,仿真计算了水平直流接地极暂态温升,获得了暂态温度场的分布规律和温升曲线,与试验结果对比分析表明,水平电极的散流、温升分布呈显著的端部效应,整体呈U字型对称分布;电极端部温升速率最高,幅值最大。仿真计算焦炭床截面对电极暂态温度场的影响表明,增大焦炭床截面可显著降低电极温升,温升最高点位于焦炭床端部周围的土壤中。

Analysis of Transient Temperature Field of Horizontal Grounding Electrode

In order to analyze the temperature characteristics of horizontal grounding electrode, the electric thermal dynamical coupling model of a 9 m horizontal grounding electrode is integrated to simulate its transient temperature rise with ANSYS software. And then it obtains distribution law of transient temperature field and temperature rise curves. Comparison of calculation and test results show that the current divergence and temperature distribution of horizontal grounding electrode present obvious end effect, which vary in a U shape manner; the ends of horizontal grounding electrode get the highest value rapidly. The influence of coke bed section on transient temperature field in grounding electrode is simulated and it shows that the temperature rise of grounding electrode can significantly decrease by increasing coke bed section, and the highest temperature is in the soil beside coke bed ends.