• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2015.07a
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• pp.90-92
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• 2015

국제해사기구는 선박평형수를 통한 수중생물의 이동을 막기 위해, 2004년 선박평형수와 침전물 통제 및 관리를 위한 국제협약을 채택하였으며 2015년 5월12일 현재 73개의 처리장치가 최종승인을 받았거나 진행중이다. 선박평형수 처리기술은 전기분해, 오존식, 자외선식 등 여러 기술이 개발되었으나 비용 및 효율면에서 전기분해방식이 타 방식에 비하여 좋고 간접식과 직접식으로 나누어지며 직접식이 간접식에 비해 우수하다. 본 논문에서는 직접식 전기분해 장치를 이용한 선박평형수 처리시스템 개발에 관해 연구하였다.

• Clean Technology
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• v.12 no.3
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• pp.145-150
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• 2006

Electrolysis of aqueous solution produces hydroxide ions and proton ions for the hydrolysis of reactive organic compounds, and oxidizing agent such as hypochlorite ions for the oxidative decomposition of organic chemicals. Electrolytic decomposition of dying chemicals was tested with our custom made system, and analyzed by HPLC and UV-VIS spectrophotometer. The electrolytic system could decompose dying chemicals with very high reactivity and low cost. Disposal of byproduct and refill of reactant during electrolysis was not necessary. Decomposition time of dying chemicals is compared under similar conditions, and application to water purification is discussed.

• Proceedings of the KIPE Conference
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• 2011.07a
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• pp.136-137
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• 2011

선박평형수내 미생물 처리를 위해 다양한 방법들이 사용되고 있으며, 본 논문에서는 랩테스트를 위한 전기분해장치로서 전기분해 방식에 사용되는 정류기 개발 및 그 장치에 관한 것이다. 선박평형수를 처리하기 위해 설계된 시스템은 랩테스트용 도로 적용이 가능하다.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.1181-1182
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• 2011

본 논문은 선박에서 발생하는 여러 해양오염원 중에서 선박평형수에서 야기되는 해양생태계의 오염 문제를 해결하기 위하여 사용되는 방법중에서 가장 효율적인 방식인 전기분해 방식에 대한 시스템 설계에 관한 연구로서, IMO의 밸러스트수 관리시스템 승인을 받기 위한 첫 번째 단계인 Basic Approval(랩테스트)을 받기 위한 전기분해 전원장치를 설계하고 시뮬레이션으로 검증하였다.

• Journal of Navigation and Port Research
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• v.41 no.3
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• pp.79-86
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• 2017

Ballast water filled into and discharged from the ballast tank of a ship has a negative impact on local marine environment due to various aquatic organisms contained therein. The IMO developed and adopted "The International Convention for the Control and Management of Ships Ballast Water and Sediments, 2004" with the purpose of protecting the marine environment from transfer of harmful aquatic organisms in ballast water carried by ships. The IMO BWM Convention was approved in September 2016 and ships must be equipped with ballast water management system after September 2017. Ships' ballast water treatment methods are divided into using active substances as electrolytic type, ozone type, chemical dosing type and using physical treatment type as filter type, ultraviolet type. It is also used with a combination of two methods. Electrolysis is superior in terms of cost and efficiency. In this study, basic principles, components, and land base test contents of electrolysis ballast water treatment system, a direct electrolyzed ballast water treatment system, were examined. Land base test was conducted with 300m3/h capacity device at the KIOST Geoje plant where the government test facility was installed. This test validated that the system meets IMO standards.

• Bulletin of Korea Environmental Preservation Association
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• v.18 no.10
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• pp.21-23
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• 1996

• Journal of the Korean Chemical Society
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• v.50 no.4
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• pp.328-337
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• 2006

purpose of this study was to find out problems in experiments for electrolysis of an aqueous CuCl2 solution in high school science textbooks and to suggest an improved experiment considering students' capability of experimenting and laboratory safety in high schools. For this study, the experiments for electrolysis of an aqueous CuCl2 solution presented in 11 high school science textbooks were classified by their experimental methods. After high school chemistry teachers performed the experiments as presented in the high school science textbooks, an analysis was performed on problems of the experiments, and an improved experiment was devised. According to the results of this study, in the experiments for electrolysis of an aqueous CuCl2 solution using a U type tube and a U type tube with branch, reaction velocity of the electrolysis was slow, therefore, a side reaction was generated. In the experiment using a beaker, reaction of each electrode could not be observed separately. And in the experiment using an electrolysis instrument, it was difficult to identify property of the reaction product. In the improved experiment using a reaction vessel of ㅂshape, reaction velocity of the electrolysis was fast, reaction of each electrode could be observed separately, and the side reaction decreased. From these results, it was suggested that the improved experiment would help high school students understand scientific conception regarding electrolysis.

• Proceedings of the KIEE Conference
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• 2000.07d
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• pp.2519-2521
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• 2000

브러시리스용 다기능 제어구동장치를 80C196KC 콘터롤러와 IPM으로 단순화하여 개발하여 기존의 TTL 소자 구성에 비하여 하드웨어를 가장 단순화시키고 표준화제품의 개발을 유도하였다. 대신에 대부분의 기능을 소프트웨어로 처리함으로써 설계의 융통성과 확장성을 높이고 고성능 저가격의 제품을 개발할 수 있었다. 특히, 속도 센서로 자극검출에 필요한 홀센서를 이용함으로써 기존 엔코드 센서에 비하여 속도 분해능은 다소 떨어지지만 이 센서를 없앨 수 있어 제품가격을 낮추고, 크기를 줄일 수 있는 장점을 갖는다. 제어 구동장치의 성능시험을 통하여 개발결과를 검증하였으며, 고정밀 속도제어를 실현할 수 있음을 확인하였다.

• Clean Technology
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• v.14 no.3
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• pp.218-223
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• 2008

Decomposition of reactive organic compound dispersed in microemulsion media by hydroxide ions and proton ions generated during electrolysis was tried and the half-lifes for decomposition were compared. Absorbance of p-nitrophenoxide produced from the decomposition of p-nitrophenylacetate (PNPA) was followed to find the rate of decomposition. The applied voltage, temperature, and the amount of substrate were changed to see the effects on the decomposition rate. The advantages of electrolysis in microemulsion system were the high solubilizing capacity of substrate, easy control of decomposition rate, low operation cost, no need for any addition of chemicals, and no byproducts. The mechanism of decomposition and the application to water purification were discussed.

• Information and Communications Magazine
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• v.33 no.7
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• pp.47-52
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• 2016

전기 자동차 및 신재생에너지 시장 확대로 EV, HEV, LEV 등 전기자동차의 수요가 증가함에 따라 2020년을 기점으로 백만개 이상의 리튬-이온 폐배터리가 생성될 것으로 예상되고 있다. 그러나 이러한 폐배터리는 잔여용량이 80%수준에서 교체되고 있어서 화학적 분해를 통한 재활용 이전에 안정적인 에너지저장장치로서 재사용할 수 있는 가능성을 보유하고 있다. 본고에서는 향후 지속적으로 발생이 예상되는 전기자동차의 폐배터리를 이용하여 에너지저장장치를 구성하는 방법에 대하여 다양한 다양한 국내외 기관들의 기술 및 연구동향에 대해 알아보고, 이를 바탕으로 효율적인 에너지저장장치 구성방법과 이를 확산하기 위한 사업화 방안 등을 알아본다.