首页> 外文会议>Electrical Insulation Conference >Rating methods for cables installed in unventilated and partially ventilated surface troughs
【24h】

Rating methods for cables installed in unventilated and partially ventilated surface troughs

机译:安装在不通荐和部分通风的表面槽中电缆的额定方法

获取原文

摘要

Cables installed in surface troughs are a critical part of many transmission circuits. This paper presents a method for calculating the rating of such circuits using computational fluid dynamics techniques, applied to two common trough designs. One design has solid concrete lids while for the second some lids are replaced by grilles to encourage natural air circulation. For the case of covered troughs with solid concrete lids, the IEC 60287 method was found to be conservative owing to its failure to consider the thermal impact of the ground. Good agreement was observed between the CFD model and an improved analytical formulation by Anders. Modeling of partially ventilated troughs, which at present cannot be rated analytically, shows continuous rating increases of up to 31% over the covered design owing to greater air circulation.
机译:安装在地表槽中的电缆是许多传输电路的关键部分。本文介绍了一种使用计算流体动力学技术计算这种电路额定值的方法,应用于两个常见的槽设计。一个设计具有固体混凝土盖子,而对于第二个,一些盖子被格栅取代,以鼓励自然空气循环。对于具有固体混凝土盖子的覆盖槽的情况,由于其未能考虑地面的热冲击,因此发现IEC 60287方法是保守的。 CFD模型与Anders的改进的分析制剂之间观察到良好的一致性。适用于分析的部分通风槽的建模,由于空气循环,在覆盖的设计中显示出在覆盖的设计中的连续评定高达31%的速度增加。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号