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首页> 外文期刊>International Journal of Heat and Mass Transfer >Electric heating of the silicon rods in Siemens reactor
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Electric heating of the silicon rods in Siemens reactor

机译：西门子反应堆中硅棒的电加热

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摘要

In the Siemens reactor, all the energy is supplied by the heat generation on silicon rods which are heated up by the passage of current, the center of the rods will become hotter than the surface which is maintained ideally at 1373 K. Understanding the thermal and electrical behaviors of silicon rods in electric heating process is crucial for an optimal operation of the Siemens reactor. In the present paper, the electric heating model of silicon rod for the 24-rod Siemens reactor has been developed. In order to verify the present model valid, calculated results by application of the model were compared with industrial data. The results show that comparing to the industrial data obtained using a 24-rod Siemens reactor, the relative error of theoretical calculations are 7.32% and 9.41 % for the rods located in the inner ring and outer ring, respectively. Based on the developed model, the influence of the location of silicon rods within Siemens reactor and reactor wall emissivity during electric heating process has been investigated. Interesting results show that the temperature gradient of silicon rods located in the outer ring is larger than the inner ones when the rods are heated up by direct current (DC). The temperature gradient within the rod becomes smaller and the required voltage and current decreases when the emissivity of the reactor wall surface decreases. Two interesting ways to reduce energy consumption can be deduced: increasing radius of the rod at the end of the process and decreasing the wall emissivity by wall surface treatment or/and selecting more appropriate materials.
机译：在西门子反应堆中，所有能量都是由硅棒上的热量产生的，硅棒上的电流会被电流加热而加热，硅棒的中心会比表面上的温度高，理想情况下，表面的温度应保持在1373K。硅棒在电加热过程中的电行为对于西门子反应堆的最佳运行至关重要。在本文中，开发了用于24棒西门子反应堆的硅棒的电加热模型。为了验证本模型的有效性，将该模型的应用计算结果与工业数据进行了比较。结果表明，与使用24杆西门子反应器获得的工业数据相比，位于内圈和外圈的棒的理论计算相对误差分别为7.32％和9.41％。基于开发的模型，研究了电加热过程中硅棒在西门子反应堆中的位置和反应堆壁发射率的影响。有趣的结果表明，当硅棒被直流电加热时，位于外圈的硅棒的温度梯度大于内棒的温度梯度。当反应器壁表面的发射率降低时，棒内的温度梯度变小，所需的电压和电流降低。可以推断出两种降低能耗的有趣方法：在过程结束时增加杆的半径，并通过壁表面处理或/和选择更合适的材料来降低壁的发射率。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2015年第11期|1026-1033|共8页
  • 作者

    Zhifeng Nie; Yanqing Hou; Gang Xie; Yan Cui; Xiaohua Yu;

  • 作者单位

    State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China,Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;

    State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China;

    Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China,Kunming Metallurgical Research Institute, Kunming 650031, China;

    Kunming Metallurgical Research Institute, Kunming 650031, China;

    Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Heat transfer; Electric heating; Modified Siemens process; Silicon rod;

    机译：传播热量;电热;修改西门子工艺;硅棒;

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