Experimental investigation of thermal transfer coefficient by a simplified energy balance of fault arc in a closed air vessel
Experimental investigation of thermal transfer coefficient by a simplified energy balance of fault arc in a closed air vessel
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封闭空气容器中故障电弧简化能量平衡传热系数的实验研究
DOI：
10.1088/2058-6272/ab511d
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发表时间：
2019-11
影响因子：
1.7
通讯作者：
Yang Fei
中科院分区：
文献类型：
--
作者：
Li Mei;Wu Yifei;Gong Peng;Li Lin;Xu Huadan;Yang Fei
热传递系数是评价封闭电气设备中故障电弧的压力效应的一个重要参数，它代表了故障电弧周围气体加热的能量部分。本文对铜、铁、铝电极材料在封闭空气容器中的换热系数进行了实验研究，实验电流范围为1~20kA，电极间隙为10~50 mm，气体压力为0.05~0.4 Mpa。建立了包括焦耳加热、电弧辐射在内的简化能量平衡模型，建立了与电极熔化、汽化和氧化相关的能量，并对各种因素对换热系数的影响进行了研究和评价。这种能量分量的定量估计证实了压力升高与断层弧热传递过程的变化密切相关，特别是考虑到焦耳加热和辐射的评估。电极材料、电弧电流、充填压力和电极间间隙长度等因素对换热系数有较大影响，从而导致故障电弧能量平衡的差异导致压力升高。
The thermal transfer coefficient that represents the portion of energy heating the surrounding gas of fault arc is a key parameter in evaluating the pressure effects due to fault arcing in a closed electrical installation. This paper presents experimental research on the thermal transfer coefficient in a closed air vessel for Cu, Fe and Al electrode materials over a current range from 1–20 kA with an electrode gap from 10–50 mm and gas pressure from 0.05–0.4 MPa. With a simplified energy balance including Joule heating, arc radiation, the energies related to electrode melting, vaporization and oxidation constructed, and the influences of different factors on thermal transfer coefficient are studied and evaluated. This quantitative estimation of the energy components confirmed that the pressure rise is closely related to the change in heat transport process of fault arc, particularly in consideration of the evaluation of Joule heating and radiation. Factors such as the electrode material, arc current, filling pressure and gap length between electrodes have a considerable effect on the thermal transfer coefficient and thus, the pressure rise due to the differences in the energy balance of fault arc.
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影响因子：
4.4
作者：
Xiang Zhang;G. Pietsch;E. Gockenbach
通讯作者：
Xiang Zhang;G. Pietsch;E. Gockenbach
影响因子：
4.4
作者：
M. Iwata;Shin-ichi Tanaka;T. Ohtaka;T. Amakawa;K. Anantavanich;Gerhard J. Pietsch
通讯作者：
M. Iwata;Shin-ichi Tanaka;T. Ohtaka;T. Amakawa;K. Anantavanich;Gerhard J. Pietsch
影响因子：
4.4
作者：
A. Dasbach;G. Pietsch
通讯作者：
A. Dasbach;G. Pietsch
影响因子：
4.4
作者：
G. Friberg;G. Pietsch
通讯作者：
G. Friberg;G. Pietsch
影响因子：
1.5
作者：
Xiang Zhang;G. Pietsch;Jiaosuo Zhang;E. Gockenbach
通讯作者：
Xiang Zhang;G. Pietsch;Jiaosuo Zhang;E. Gockenbach