Preservation of Seed Crystals in Feedstock Melting for Cast Quasi-Single Crystalline Silicon Ingots
The preservation of seed crystals is important for the casting of quasi-single crystalline (QSC) silicon ingots. We carried out transient global simulations of the feedstock melting process in an industrial-sized directional solidification (DS) furnace to investigate key factors influencing seed pre...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2013/670315 |
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| author | Zaoyang Li Lijun Liu Yunfeng Zhang Qingchao Meng Zhiyan Hu Genshu Zhou |
| author_facet | Zaoyang Li Lijun Liu Yunfeng Zhang Qingchao Meng Zhiyan Hu Genshu Zhou |
| author_sort | Zaoyang Li |
| collection | DOAJ |
| description | The preservation of seed crystals is important for the casting of quasi-single crystalline (QSC) silicon ingots. We carried out transient global simulations of the feedstock melting process in an industrial-sized directional solidification (DS) furnace to investigate key factors influencing seed preservation. The power distribution between the top and side heaters is adjusted in the conventional furnace for multicrystalline silicon ingots and in the evolved furnace with a partition block for QSC silicon ingots. The evolution of the solid-liquid interface for melting and the temperature distribution in the furnace core area are analyzed. The power distribution can influence the temperature gradient in the silicon domain significantly. However, its effect on seed preservation is limited in both furnaces. Seed crystals can be preserved in the evolved furnace, as the partition block reduces the radiant heat flux from the insulation walls to the heat exchange block and prevents the heat flowing upwards under the crucible. Therefore, the key to seed preservation is to control radiant heat transfer in the DS furnace and guarantee downward heat flux under the crucible. |
| format | Article |
| id | doaj-art-1236bb1a5aba4fec8629a6f744061700 |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-1236bb1a5aba4fec8629a6f7440617002025-02-03T06:04:57ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2013-01-01201310.1155/2013/670315670315Preservation of Seed Crystals in Feedstock Melting for Cast Quasi-Single Crystalline Silicon IngotsZaoyang Li0Lijun Liu1Yunfeng Zhang2Qingchao Meng3Zhiyan Hu4Genshu Zhou5Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, ChinaKey Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, ChinaYingli Green Energy Holding Co., Ltd., Baoding, Hebei 071051, ChinaYingli Green Energy Holding Co., Ltd., Baoding, Hebei 071051, ChinaYingli Green Energy Holding Co., Ltd., Baoding, Hebei 071051, ChinaState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaThe preservation of seed crystals is important for the casting of quasi-single crystalline (QSC) silicon ingots. We carried out transient global simulations of the feedstock melting process in an industrial-sized directional solidification (DS) furnace to investigate key factors influencing seed preservation. The power distribution between the top and side heaters is adjusted in the conventional furnace for multicrystalline silicon ingots and in the evolved furnace with a partition block for QSC silicon ingots. The evolution of the solid-liquid interface for melting and the temperature distribution in the furnace core area are analyzed. The power distribution can influence the temperature gradient in the silicon domain significantly. However, its effect on seed preservation is limited in both furnaces. Seed crystals can be preserved in the evolved furnace, as the partition block reduces the radiant heat flux from the insulation walls to the heat exchange block and prevents the heat flowing upwards under the crucible. Therefore, the key to seed preservation is to control radiant heat transfer in the DS furnace and guarantee downward heat flux under the crucible.http://dx.doi.org/10.1155/2013/670315 |
| spellingShingle | Zaoyang Li Lijun Liu Yunfeng Zhang Qingchao Meng Zhiyan Hu Genshu Zhou Preservation of Seed Crystals in Feedstock Melting for Cast Quasi-Single Crystalline Silicon Ingots International Journal of Photoenergy |
| title | Preservation of Seed Crystals in Feedstock Melting for Cast Quasi-Single Crystalline Silicon Ingots |
| title_full | Preservation of Seed Crystals in Feedstock Melting for Cast Quasi-Single Crystalline Silicon Ingots |
| title_fullStr | Preservation of Seed Crystals in Feedstock Melting for Cast Quasi-Single Crystalline Silicon Ingots |
| title_full_unstemmed | Preservation of Seed Crystals in Feedstock Melting for Cast Quasi-Single Crystalline Silicon Ingots |
| title_short | Preservation of Seed Crystals in Feedstock Melting for Cast Quasi-Single Crystalline Silicon Ingots |
| title_sort | preservation of seed crystals in feedstock melting for cast quasi single crystalline silicon ingots |
| url | http://dx.doi.org/10.1155/2013/670315 |
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