Multicrystalline silicon solar cells occupy 62% in crystalline silicon solar cell production. It is grown by the directional solidification process. Solidification control has a vital role in directional solidification process. Cone shape groove is made in the directional solidification block to enhance the outgoing heat flux in the center region than the peripheral region. Five directional solidification furnaces are simulated for making a multicrystalline silicon ingot. First furnace is the conventional furnace, the second furnace has 30 mm × 85 mm groove block, the third furnace has 40 mm × 85 mm groove block, the fourth furnace has 50 mm × 85 mm groove block and the fifth furnace has 60 mm × 85 mm groove block. The von Mises stress in the maximum volume of the conventional and modified grown ingots are below the range of critical value. In conventional case 7% of the ingot volume is above critical stress value and in the modified cases 2.5% of the ingot volume is above critical stress value. If axial and radial temperature gradient is combined in the 50 mm × 85 mm groove block leads to better results.

中文翻译：

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锥形槽DS块提高mc-Si铸锭质量的数值研究

多晶硅太阳能电池占晶体硅太阳能电池生产的62%。它是通过定向凝固过程生长的。凝固控制在定向凝固过程中起着至关重要的作用。在定向凝固块上开锥形槽，以增强中心区域的热通量比周边区域的向外扩散。模拟五个定向凝固炉制备多晶硅锭。第一炉为常规炉，第二炉为30mm×85mm槽块，第三炉为40mm×85mm槽块，第四炉为50mm×85mm槽块，第五炉为60mm× 85 毫米凹槽块。常规和改良生长锭的最大体积中的冯米塞斯应力低于临界值范围。在常规情况下，7% 的锭体积高于临界应力值，而在改进的情况下，2.5% 的锭体积高于临界应力值。如果在 50 mm × 85 mm 凹槽块中结合轴向和径向温度梯度会得到更好的结果。