Influence of additional heat exchanger block on directional solidification system for growing multi-crystalline silicon ingot – A simulation investigation

2018 ◽  
Author(s):  
S. G. Nagarajan ◽  
M. Srinivasan ◽  
K. Aravinth ◽  
P. Ramasamy
Keyword(s):  
Heat Exchanger ◽  
Directional Solidification ◽  
Crystalline Silicon ◽  
Additional Heat ◽  
Silicon Ingot

Experiment Research on Purifying Metallurgical Grade Silicon and Crystal Growth in Directional Solidification

2009 ◽  
Vol 79-82 ◽  
pp. 1213-1216 ◽  
Author(s):  
Xiang Yang Mei ◽  
Wen Hui Ma ◽  
Kui Xian Wei ◽  
Yong Nian Dai
Keyword(s):  
Crystal Growth ◽  
Directional Solidification ◽  
Crystalline Silicon ◽  
Acid Leaching ◽  
Raw Material ◽  
Metallurgical Grade Silicon ◽  
Silicon Ingot ◽  
Metal Impurities ◽  
Segregation Effect ◽  
Grade Silicon

The main raw material of solar energy is multi-crystalline silicon. Directional solidification technique is one important technological process of metallurgy purification technology for multi-crystalline silicon. It can purify metallurgical grade silicon by removing metal impurities and control crystal growth at the same time. In experiment, metallurgical grade silicon by acid leaching pre-treatment, was purified by our self-assembled directional solidification furnace. The sample was analyzed by electron-prode micro analysis (EPMA). According to the results, the removal efficiency of Fe and Al is 96.3% and 96.7%, respectively. The removing mechanism of metal impurities and the difference between theory value and experiment value were also discussed. The segregation effect in directional solidification is the reason of removing Fe, but analgesic effects of the segregation effect combined with vacuum volatilization are that of removing Al. When the silicon ingot was cooled down, lengthways section of silicon ingot was cut and etched, crystal growth was studied. The results indicate that columnar crystal growth shows diverging tendency from the bottom to the top of silicon ingots, and solidification interface shape is convex. The reasons may be the nucleation of new crystals on crucible sidewall is very serious and the pulling rate is too high.

Movable partition designed for the seed-assisted silicon ingot casting in directional solidification process

2014 ◽  
Vol 49 (6) ◽  
pp. 405-413 ◽  
Author(s):  
Changlin Ding ◽  
Meiling Huang ◽  
Genxiang Zhong ◽  
Lijun Liu ◽  
Xinming Huang
Keyword(s):  
Directional Solidification ◽  
Solidification Process ◽  
Ingot Casting ◽  
Silicon Ingot ◽  
Directional Solidification Process

A Novel Window Type Air-Conditioner with Energy Recovering

2011 ◽  
Vol 250-253 ◽  
pp. 3021-3024
Author(s):  
Qing Hai Luo ◽  
Peng Fei Zhang ◽  
Xiu Fei Yang ◽  
Jun Zou
Keyword(s):  
Energy Efficiency ◽  
Heat Exchanger ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
The Other ◽  
The Novel ◽  
Air Conditioner ◽  
Efficiency Ratio ◽  
Additional Heat ◽  
Experimental Prototype

A novel window type air-conditioner with energy recovering was experimented. The experimental prototype can make fresh air exchange heat with exhaust air in an additional heat exchanger, which consist no additional moving parts. The EER (energy efficiency ratio) of the experimental air-conditioner (EAC) is increased by 17.4~37.3% than that of the original ordinary window type air-conditioner (OAC). On the other hand, the fresh air proportion of the EAC is increased by 20% or so than that of the OAC, so indoor air quality can be greatly improved via the EAC; however the indoor noise of the EAC is increased by 3.2 dB or so. The novel experimental prototype is of great significance for energy efficiency.

The effect of silica nucleation layers on grain control of multi-crystalline silicon in directional solidification

2014 ◽  
Vol 404 ◽  
pp. 59-64 ◽  
Author(s):  
Y.T. Wong ◽  
C.T. Hsieh ◽  
A. Lan ◽  
C. Hsu ◽  
C.W. Lan
Keyword(s):  
Directional Solidification ◽  
Crystalline Silicon

scholarly journals On the impact of twinning on the formation of the grain structure of multi-crystalline silicon for photovoltaic applications during directional solidification

2015 ◽  
Vol 418 ◽  
pp. 38-44 ◽  
Author(s):  
Thècle Riberi-Béridot ◽  
Nathalie Mangelinck-Noël ◽  
Amina Tandjaoui ◽  
Guillaume Reinhart ◽  
Bernard Billia ◽  
...  
Keyword(s):  
Directional Solidification ◽  
Crystalline Silicon ◽  
Grain Structure ◽  
Photovoltaic Applications ◽  
The Impact
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