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염민규,이수민,박영훈,한경숙 한국인터넷방송통신학회 2023 한국인터넷방송통신학회 논문지 Vol.23 No.6
Recently, interest in metaverse, which creates new value in the real world, has increased. In order to make it easy to experience such a metaverse, we have developed an experiential metaverse AR game in which users take the lead in exploring the environment and enjoying content based on landmarks. Important features of the metaverse include connectivity with the real world, interactivity, and digital currency. The game seeks to extend daily life through AR and satisfies interaction through real-time chat and team competition. Finally, digital currency is built through a store system. It is implemented as a mobile game and can be accessed at any time if there is a smartphone, increasing accessibility.
염민규,정진,김창녕 경희대학교 산학협력기술연구원 2005 산학협력기술연구논문집 Vol.11 No.3
This study has been conducted to investigate flow characteristics in a microchannel driven by the eletroosmosis. In this study, the change of velocity distribution has been investigated for different channel diameters and different voltages. Numerical analysis has been performed in a steady state two dimensional flow in microchannels. It has been found that when the channel diameter is greater the maximum velocity is smaller, and that when the voltage difference is greater the maximum velocity is greater. This study may supply fundamental understandings for the design and analysis of the prototypes of microchannel with eletroosmosis.
마이크로 광촉매 반응기의 휘발성 트리클로로에탄 제거에 관한 수치해석적 연구
염민규,정진,김창녕 경희대학교 산학협력기술연구원 2006 산학협력기술연구논문집 Vol.12 No.1
This study has been numerically conducted to investigate the removal efficiency of Volatile Organic Compound (VOC) in photocatalytic microreactor. This study has placed emphasis on the ímprovements of the working condition of photocatalytic microreactor. The microreactor consists of 19 microchannels with a rectangular cross-section. The degradation characteristics with different inlet concentrations and velocities have been obtained. The current results can be used for the design of advanced photocatalytic microreactor. 휘 발성 유가 화합물 (Volatile Organic Compound, 이하 VOC) 은 크게 순수한 탄화수소로 구성된 비할로겐 화합물과 수소원자가 할로겐 원자 (염소, 불소,브롬 등)로 일부 혹은 전부 치환된 할로겐화 화합물올 모두 통칭한다. 도장공정,합성수지 제조공정,인쇄공정,유기용제 및 세정공정 등의 산업 환경이나 실내공간에서 다양하게 배출되고 있는 VOC 는 이동성이 강하고 악취를 유발할 뿐만 아니라 마취성이 강하며 잠재적인 독성 및 발암성을 가진 다. 이러한 VOC달 처리하기 위해 현재 사용되고 있는 후처리기술로는 열소각법,촉매소각법,흡착법,생물여과법,광촉매 기술 등이 있지만 각각 의 장단점으로 인해 사용상의 한계 가 있다. 열소각법이나 촉매소각법은 고농도의 VOC도 제거할 수 있지만 비용이 많이 들고 C0_(2), NOx등의 2차 오염 물질을 발생시킨다. 흡착법은 운전시 발생되는 폐수나 소모된 흡착제를 처리해야 하는 문제점이 있다. 그리고 생물여과법은 운전비가 적게 들고 2차 오염물의 발생이 거의 없지만 처리용량에 비해서 시스템이 너무 큰 단점이 있다. 광촉매 분해기술은 385nm 이하의 자외선을 흡수하여 표면 에서 생긴 전자에 의한 환원반응과 정공에 의한 산화반응으로 유해물질을 제거하는 방법으로 최근에 주목받고 있는 분야이다. 광촉매는 한번의 설치로 반영구적 으로 사용할 수 있고 인체에 무해하며 유지 비용이 적게 든다는 장점이 있으나 다른 방법 에 비해 제거효율이 낮아 저농도의 VOC 제거 에만 적당 하다는 단점이 있다. 광촉매의 성능을 향상시키기 위한 연구로는 귀금속 첨가,복합화,전이금속 도핑 등이 많이 수행되고 있다. 그리고, 이러한 연구에 수반되어야 할 사항이 반응기의 형상에 관한 것이다.
마이크로 광촉매 반응기의 VOC 제거에 관한 수치해석적 연구
염민규(Min Qou Youm),정진(Jin-Jeong),김창녕(Chang-Nyung Kim) 대한설비공학회 2007 설비공학 논문집 Vol.19 No.4
This study has been numerically conducted to investigate the removal efficiency of Volatile Organic Compound (VOC) in photocatalytic micro-reactor. This study has placed emphasis on the improvements of the working condition of photocatalytic micro-reactor. The micro-reactor consists of 19 microchannels with a rectangular cross-section. For the validation of the current numerical study, a computation has been carried out to simulate an existing experimental study on the cylindrical reactor, which has shown a good agreement. The degradation characteristics with different inlet concentrations and velocities have been obtained. The current results can be used for the design of advanced photocatalytic micro-reactor.
하이브리드 에너지 저장장치를 탑재한 무가선 트램의 전력분배전략
강경진(Kyung-Jin Kang),오용국(Yong-Kuk Oh),이지호(Jee-Ho Lee),염민규(Min-Kyu Yeom),곽재호(Jae-Ho Kwak),이형철(Hyeong-Cheol Lee) 대한전기학회 2014 전기학회논문지 Vol.63 No.11
A wireless tram which runs without catenary and instead uses batteries installed in the tram has been recently researched actively. This paper presents a new method maximizing absorption of regenerative energy of a wireless tram and extending life cycle of the energy storage device in the wireless tram by applying line-optimized charging and discharging scenario. Energy efficiency and life cycle of energy storage system (ESS) are highly dependent on the characteristic of operating conditions. For example, frequent charge and discharge with high power cause the problems that decrease the battery life cycles. Hybrid energy storage system (HESS) is combination of two ESSs which have complementary characteristics to each other. HESS can provide even better functionality and performance than the battery only ESS due to the synergy effect of two ESSs. This paper also provides a power distribution strategy and driving scenarios which increase the life cycle and energy efficiency of the HESS consisting of a battery and an ultra-capacitor. The developed strategy was tested and verified by a hardware-in-the-loop-simulation (HILS) system which emulates the a wireless tram.
광촉매 마이크로 반응기의 내부 형상에 따른 VOC 분해특성에 관한 수치해석적 연구
용정권(Jung Kwon Yong),김창녕(Chang Nyung Kim),염민규(Min-Qou Youm) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
A numerical analysis was carried out to investigate the degradation of Volatile Organic Compounds (VOC) in photocatalytic microreactors with different inner geometries. Two different cases of microreactor were considered, namely, one microreactor has bump on the channel and the other has no bump on the channel. The removal efficiency of VOC has been calculated by the Langmuir-Hinshelwood reaction rate equation that was obtained from the experimental results. From the numerical calculations, it was observed that the conversion ratio of VOC for the microchannel with bump is about 4.5% greater than the microchannel without bump. And the mass transfer characteristics in the microreactor are also shown in numerical results. These results can be used effectively for the photocatalytic numerical analysis.