• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.11
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• pp.3074-3079
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• 2009

Efficient energy use becomes necessary since energy consumption has dramatically been increasing due to continuous economic development and population growth. In particular, high efficient vacuum glazing needs to be introduced to buildings where enormous energy loss occurs through windows and has been rarely used yet due to its high price and performance. Therefore, in this study, torch for glass welding was developed with CFD(Computational Fluid Dynamics) and experiments. Torch shape, nozzle diameter, nozzle arrangement etc. were mainly optimized and hydrogen-oxygen mixed gas fuels the torch. Finally, glass welding with the developed torch has been successful, showing that it can be used to develop economic vacuum glazing.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.05a
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• pp.95-96
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• 2010

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2009.06a
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• pp.169-170
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• 2009

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.11a
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• pp.791-792
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• 2010

• Journal of Korean Society for Atmospheric Environment
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• v.29 no.3
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• pp.287-296
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• 2013

To decompose carbon dioxide, which is a representative greenhouse gas, a plasma torch was designed and manufactured. To examine the characteristics of carbon dioxide decomposition via plasma discharge, a case wherein pure carbon dioxide was supplied and a case wherein methane and/or $TiCl_4$ were injected as additives were investigated and compared. The carbon dioxide and methane conversion rate, energy decomposition efficiency, produced gas concentration, carbon monoxide and hydrogen selectivity, carbon-black and $TiO_2$ were also investigated. The maximum carbon dioxide conversion rate was 28.9% when pure carbon dioxide was supplied; 44.6% when $TiCl_4$ was injected as am additive; and 100% percent when methane was injected as an additive. Therefore, this could be explained that the methane injection showed the highest carbon dioxide decomposition. Furthermore, the carbon-black and $TiO_2$ were compared with each commercial materials through XRD and SEM. It was found that the carbon-black that was produced in this study is similar for commercial materials. It was found that the $TiO_2$ that was produced in this study is suitable for photocatalyst and pigment because it has mixed anataze and rutile.

• Proceedings of the KWS Conference
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• 2009.11a
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• pp.78-78
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• 2009

Glass sealing method is used glass bond as called frit in LCD, PDP process. but new sealing method is need to consider the endurance and economy. This paper present the new glass sealing method using high density gas torch in the furnace and process variable are defined by experiment. Taguchi Robust Experimental Design methods were applied for optimizing these four main processing parameters.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.21 no.1
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• pp.40-45
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• 2012

The glass edge sealing is one of the vacuum glazing core manufacturing process and it needs the high reliability for the vacuum keeping. Conventionally, the glass edge sealing had been being researched by the method that pasted the flit on the glass edge part and bonded two sheets of glass. But this way has the defect that can't make tempered glass. In order to remedy it's faults, in this paper, the glass edge was sealed by using the hydrogen mixture gas torch within the furnace. The parameter having an effect on the glass edge sealing through the basic test was set. And the correlation of the thickness of the glass edge and parameter were analyzed through the design of experiment. By using the Taguchi method, the optimal process condition for the glass edge sealing was drawn and the validity was verified.

• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.167-170
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• 2009

최근 에너지 사용이 획기적으로 증가함에 따라 효율적인 에너지 사용이 필요하게 되었다. 특히 건물에서 벽체보다 에너지 손실이 많이 발생하는 창호의 경우 단열성능이 좋은 고효율 진공유리의 사용이 절실하나, 가격 및 성능 등의 문제로 보급화가 늦어지고 있는 실정이다. 본 연구에서는 저가형 고효율 진공유리 개발을 위한 기초 연구로써 유리 용접용 수소-산소 혼합가스 토치 개발하기 위한 열해석을 수행하였다. 주로 토치의 형상, 노즐 배치 및 직경 변경을 통한 토치 최적화를 수행하였다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.2
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• pp.511-516
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• 2013

The thickness and deflection of melting parts of the glass edge reach the biggest effect on the intensity and thermal insulation performance. During the sealing process using a hydrogen mixed gas torch, the thickness and the deflection effect of the edge part are affected by process parameters. In order to analyze the correlative relationship of the thickness prediction and the deflection of the edge part according to the process parameters, data was obtained by conducting sealing experiments. The main effects and interaction effects of process parameters for the thickness and the shape of the glass edge parts were analyzed through the design of experiment. A mathematical experiment equation that can predict the thickness and deflection of the edge part according to the process parameters was developed by conducting multiple regression equations.