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首页> 外文期刊>Journal of Crystal Growth >Effects of argon flow on melt convection and interface shape in a directional solidification process for an industrial-size solar silicon ingot
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Effects of argon flow on melt convection and interface shape in a directional solidification process for an industrial-size solar silicon ingot

机译：工业尺寸太阳能硅锭定向凝固过程中氩气流量对熔体对流和界面形状的影响

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摘要

We carried out global simulations of heat transfer to investigate the argon flow effect on the melt convection and melt-crystal (m-c) interface shape at different stages of an industrial directional solidification (DS) process for the multi-crystalline silicon (mc-Si) ingot. We found that the convective heat transfer at the melt free surface due to the argon flow significantly changed the temperature distribution in the upper layer of the silicon melt. The shear stress caused by the argon flow along the melt free surface increases with an increase in argon flow rate. The melt flow pattern under the central area of the free surface changes accordingly. The argon flow has little impact on the m-c interface shape at the early stage of the DS process. At the middle stage, the m-c interface shape is mainly influenced by the pattern and intensity of the melt convection, which are modified by the argon flow. It is less convex to the melt with a larger argon flow rate. However, the m-c interface is more convex to the melt with an increase in argon flow rate at the final stage of the DS process, because it is then directly affected by the cooling effect of the gas flow.
机译：我们进行了传热的全局模拟，以研究氩气在多晶硅（mc-Si）工业定向凝固（DS）工艺的不同阶段对熔体对流和熔体晶体（mc）界面形状的影响锭。我们发现，由于氩气流，在无熔体表面的对流传热显着改变了硅熔体上层的温度分布。沿着无熔体表面的氩气流引起的剪切应力随着氩流量的增加而增加。在自由表面的中心区域下的熔体流动模式相应地改变。在DS过程的早期，氩气流对m-c界面的形状影响很小。在中间阶段，m-c界面形状主要受熔体对流的模式和强度影响，而氩气会改变熔体对流的模式和强度。对于较大的氩气流量，它对熔体的凸度较小。但是，在DS过程的最后阶段，随着氩气流量的增加，m-c界面对熔体更凸，因为它随后直接受到气流冷却效果的影响。

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  • 来源
    《Journal of Crystal Growth》 |2012年第2012期|p.87-91|共5页
  • 作者

    Zaoyang Li; Lijun Liu; Xin Liu; Yunfeng Zhang; Jingfeng Xiong;

  • 作者单位

    Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China;

    Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China;

    Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China;

    Yingli Green Energy Holding Co., Ltd., Baoding, Hebei 071051, China;

    Yingli Green Energy Holding Co., Ltd., Baoding, Hebei 071051, China;

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

    A1. Computer simulation; A1. Directional solidification; A1. Gas flow; A1. Melt convection; A1. Melt-crystal interface; B3. Solar cells;

    机译：A1。计算机仿真;A1。定向凝固;A1。气体流量A1。对流融化;A1。熔体-晶体界面;B3。太阳能电池;

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