基于重力热管技术的高压套管高效散热性能分析

Numerical simulation of heat pipe technology used in high efficiency dissipation for high voltage bushing

以油气套管为研究对象,将高压套管等效为有热源的重力热管计算模型,对套管内部的温度场和速度场进行了数值分析和计算比较。可知,采用R113作为制冷工质的高压套管等效重力热管模型基本符合重力热管的传热传质规律,能够有效降低套管工作时过热区域的最高温度,平衡轴向上壁面温度分布。结果表明热管技术能够有效改善超、特高压套管的散热问题。

Taking oil - SF6 bushing as the object of study, the high voltage bushing is equivalent to a gravity heat pipe mod- el with constant heat source. Numerical analysis and calculation of temperature and velocity filed inside the bushing were carried out. The calculation analysis shows that bushing equivalent model, with using R113 as refrigerant, is agreed with the law of mass and heat transfer in the gravity heat pipe, and can significantly reduce the maximum temperature in the superheat zone under the bushing operation and balance the wall temperature distribution in the axial direction. The results show that the heat pipe technol- ogy can effectively improve the heat dissipation of high voltage.