합성가스 생산을 위한 플라즈마-덤프 개질기 개발

김은혁(Eun Hyuk Kim),Fatine Mahir,전영남(Young Nam Chun) 한국신재생에너지학회 2015 한국신재생에너지학회 학술대회논문집 Vol.2015 No.6

여대생의 자기이미지와 미디어관여가 외모관리행동에 미치는 영향

김지양 ( Ji Yang Kim ),임은혁 ( Eun Hyuk Yim ),전호경 ( Ho Kyung Chun ) 한국패션비즈니스학회 2013 패션 비즈니스 Vol.17 No.2

The purpose of this study is to verify effects of female college students` self-image on appearance management behavior and investigate the differences caused by TV involvement and entertainer imitation on the appearance managing behavior. Respondents of the survey were 424 college females living in Seoul and Gyeonggi province. For statistical analysis, factor analysis and multiple regression were conducted using SPSS 18.0 program. The results of this study are as follows: First, self-image among college females were composed of 5 factors, which were active image, feminine image, intelligent image, gentle image and modern image. Second, college females` self-image influenced on skin management behavior, hair management behavior, make-up behavior, clothing behavior and weight management behavior significantly. Specifically, as respondents` active image and modern image are getting higher, they tend to perform skin management behavior, hair management behavior and clothing behavior. As female students` intellectual image and modern image were getting higher, more positive effects were found on make-up behavior. As female students` gentle image and active image were getting higher, there was more positive effects on weight management behavior. But, female students` self-image didn`t show significant effects on cosmetic surgery behavior. Third, when subjects` TV involvement was high, self-image made greater effect on skin management behavior and cosmetic surgery behavior than those with low TV involvement. Forth, when entertainer imitation was high, self-image made greater effects on skin management behavior, hair management behavior, clothing behavior, make-up behavior, weight management behavior, cosmetic surgery behavior than those with low entertainer management.

VOCs 저감을 위한 플라즈마-덤프 연소기 개발

김은혁(Eun Hyuk Kim),Fatine Mahir,전영남(Young Nam Chun) 한국신재생에너지학회 2016 신재생에너지 Vol.12 No.1

Volatile Organic Compounds are mainly produced by painting or during the painting drying processes, because of their low calorific value stable incineration of VOCs cannot be ensured with direct combustion, in this study, plasma dump is proposed for the removal of toluene, one of the most representative VOC compounds, by the application of adsorption and concentration, the plasma dump is combined with a 3 phase gliding arc plasma in a dump shaped form. in this study, the VOCs were stably removed by a combustion in the dump burner that can be used for mass treatment. besides, in order to achieve a complete combustion of the low calorific value VOCs, the interior of the reactor is newly designed for the outlet of the 3D matrix regenerator. To examine the VOc removal processing efficiency by the plasma dump reactor, the raw gas flux , the VOC concentration, the inlet position, and the effect of the installation of the 3D matrix, were investigated. at a toluene supply rate of 3000 ppm, an injection rate of 450 L/min, an input power of 2.5 ㎾, and in the case of the VOC inlet position on the exterior and the presence of the 3D matrix, the conditions resulted in an energy conversion rate of 12.27 ㎏ (㎾h)<SUP>-1</SUP>.

VOC 분해 플라즈마-덤프 연소기 특성

김은혁(Eun Hyuk Kim),전영남(Young Nam Chun) 大韓環境工學會 2015 대한환경공학회지 Vol.37 No.8

휘발성 유기화합물인 VOCs (Volatile Organic Compounds)는 주로 도색 공정이나 유기용제를 사용하는 업체나 세탁소 등에서 발생된다. 이는 다양한 형태의 탄화수소로 구성되어 있으며 대기 중에 방출되어 희석되므로 그 농도가 낮아 발열량이 크지 않기 때문에 일반 연소기로는 직접 소각처리가 어렵다. 본 연구에서는 이와 같이 저열량 가스인 VOC를 처리하기 위해 새로운 형태의 플라즈마-덤프 연소기를 제안하였다. 이 연소기는 플라즈마 버너와 덤프 연소기 그리고 3D 매트릭스 버너의 특성이 조합된 형태로 이루어졌다. 따라서 본 연소기는 안정적인 화염형성과 VOC 분해에 필요한 충분한 분해온도와 체류시간을 확보할 수 있는 구조로 되어있다. 플라즈마-덤프 연소기의 성능특성을 규명하기 위해 모사 VOC를 톨루엔으로 하여 VOC 공급량과 농도 그리고 VOC 인젝터 위치 등에 대해 실험을 수행하였다. VOC 인젝터 위치를 바깥쪽으로 하여 톨루엔의 농도가 3,000 ppm인 VOC를 450 L/min 공급한 경우 VOC 분해효율이 89.64%이고 에너지 효율은 1.227 kg/kWh으로 기존의 연소기에 비해 우수한 성능을 보였다. VOCs (Volatile Organic Compounds) are generally generated in the painting process, or at the company and laundry where use organic solvents. The VOCs consist of various hydrocarbons and has low calorific value due to its dilution with atmospheric air. Therefore, the VOCs are difficult to burn by a conventional fuel combustor. In this study, a novel plasma dump combustor was proposed for the treatment of low calorific VOC gases. This combustor was designed a combination of the characteristics in a plasma burner, a dump combustor and a 3D matrix burner. The combustor has good structure for maintaining enough residence time and reaction temperature for stable flame formation and VOC destruction. For investigating the performance characteristics of the plasma dump combustor, an experiment was achieved for VOC feed rate, VOC injector position, etc. Toluene was used as a surrogate of VOC. The novel combustor gave better performance than a conventional combustor, showing that VOC destruction rate and energy efficiency were 89.64% and 12.27 kg/kWh respectively, at feeding rate of 450 L/min of VOC of 3,000 ppm of toluene concentration.

플라즈마-덤프 연소기 VOC 분해 특성

김은혁(Eun Hyuk Kim),Fatine Mahir,전영남(Young Nam Chun) 한국신재생에너지학회 2015 한국신재생에너지학회 학술대회논문집 Vol.2015 No.6

하수처리장에서 발생하는 고농축 잉여슬러지의 열적가용화 특성에 관한 연구

박명수 ( Myoung Soo Park ),김은혁 ( Eun Hyuk Kim ),구슬기 ( Seul Ki Koo ) 한국폐기물자원순환학회 2022 한국폐기물자원순환학회 추계학술발표논문집 Vol.2022 No.0

슬러지 촤 마이크로웨이브 CO₂ 가스화와 순산소-스팀 연소

송희관(Hee Gaen Song),김은혁(Eun Hyuk Kim),박나형(Na Hyeong Park),조연경(Yeon Gyeong Jo),전영남(Young Nam Chun) 한국에너지기후변화학회 2018 에너지기후변화학회지 Vol.13 No.2

The studies on carbon dioxide microwave conversion for sewage sludge were carried out in order to secure a biomass waste to energy conversion technology. The microwave reforming was applied a biomass char as a carbon receptor. The carbon dioxide (CO₂), which is a main greenhouse gas, was converted to carbon monoxide (CO) fuel by the microwave reforming with fixed carbon among the carbon acceptors. The maximum CO₂ conversion rate was 74%. In order to use the biomass char as a pulverized carbonized fuel, an oxyfuel-steam combustion technique was applied. Numerical calculations were carried out for changes in the amount of oxygen or steam feed to determine the combustion characteristics. As the amount of oxygen feed was increased, the combustion temperature remained constant after showing the initial temperature increase rapidly. Residual char and carbon monoxide also increased in relative good combustion, and then they were extinguished and decreased respectively after the initial productions. When the amount of steam feed was increased, the temperature increase rate and the maximum temperature were relatively low, and the residual char and carbon monoxide were reduced to the latter half and then decreased respectively.

VOCs 제거를 위한 플라즈마-덤프 연소기 개발

전영남(Young Nam Chun),김은혁(Eun Hyuk Kim),임문섭(Mun Sup Lim),천우일(Woo Il Cheon) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11

Volatile organic compounds (VOCs) are gases with low calorific values produced from the painting or drying process whose stable combustion cannot be ensured by direct combustion. In this study, a plasma dump combustor was proposed to remove a representative VOC, toluene, after the desorption of VOCs from the painting process via adsorption and concentration. The three-phase gliding arc plasma and dump combustor were combined. The system treated VOCs with a stable flame due to the plasma, and strong oxidative power due to the high-energy free electrons and diverse radicals. Mass treatment was possible using the dump combustor. The toluene reduction characteristic was examined according to the total gas feed, electric supply, and 3D matrix heat accumulator. When the dump injector was placed inside and a 3D matrix was installed at a 180 L/min gas injection rate, 100.7 W electric power, and 3000 ppm injection concentration, the toluene decomposition efficiency was 99.5%, and the energy efficiency was 447.2g(kWh)<SUP>-1</SUP>, which was the highest.

제작된 선량 검증용 IMRT 팬텀의 몬테칼로 시뮬레이션: 예비적 연구

강세권,정광호,주라형,조병철,오도훈,김수산,김경주,배훈식,한영이,신은혁,박성호,임천일,Kang, Sei-Kwon,Cheong, Kwang-Ho,Ju, Ra-Hyeong,Cho, Byung-Chul,Oh, Do-Hoon,Kim, Su-SSan,Kim, Kyoung-Ju,Bae, Hoon-Sik,Han, Young-Yih,Shin, Eun-Hyuk,Park, 한국의학물리학회 2007 의학물리 Vol.18 No.3

세기조절방사선치료(Intensity modulated radiation therapy, IMRT) 선량의 정확도를 원격으로 점검할 수 있는 시스템 구축을 목적으로, 두경부용 팬텀을 제작하였다. 팬텀은 공기 및 뼈 구조물의 교체 장착을 통해, 균질 혹은 비균질 팬텀으로 이용할 수 있다. 일차적으로 단일 빔 및 세 빔의 조사에 대한 몬테칼로(Monte Carlo, MC) 전산모사를 시행하고, 이온 전리함 및 열형광선량계(thermoluminescent dosimeter, TLD)를 이용한 측정과 비교하였다. TLD의 판독은 독립된 두 기관에서 수행하였다. 단일 빔의 경우, 균질 및 비균질 팬텀에 대한 이온 전리함 측정 결과는 MC전산모사 결과와 대체로 2% 수준에서 일치하였으며, TLD 의 경우에는 기관에 따라 2% 혹은 7%수준의 차이를 보였다. 세 빔을 이용한 비교의 경우에는, 이온 전리함은 -5% 수준, TLD의 경우에는 $+2{\sim}+3%$ 수준의 차이를 보였다. 원격 선량 검증을 위해서는 TLD 판독의 신뢰도 향상이 필요한 것으로 판단되었다. MC 전산모사는 새로운 팬텀 개발 시에, 선량 측정값의 신뢰도 확보에 이용될 수 있다. A head-and-neck phantom was designed in order to evaluate remotely the quality of the delivery dose of intensity modulated radiation therapy (IMRT) in each institution. The phantom is homogeneous or inhomogeneous by interchanging the phantom material with the substructure like an air or bone plug. Monte Carlo simulations were executed for one beam and three beams to the phantom and compared with ion chamber and thermoluminescent dosimeter (TLD) measurements of which readings were from two independent institutions. For single beam, the ion chamber results and the MC simulations agreed to within about 2% TLDs agreed with the MC results to within 2% or 7% according to which institution read the TLDs. For three beams, the ion chamber results showed -5% maximum discrepancy and those of TLDs were $+2{\sim}+3%$. The accuracy of the TLD leadings should be increased for the remote dose monitoring. MC simulations are a valuable tool to acquire the reliability of the measurements in developing a new phantom.

다약재 내성 유전자 종류 규명

문예성(Yae-Sung Mun),고용훈(Yong-Hoon Go),이용현(Yong-Hyun Lee),이은혁(Eun-Hyuk Lee),강현아(Hyun-A Kang),김연재(Yun-Jae Kim),문송미(Song Mi Moon),황유진(You-Jin Hwang) 한국산학기술학회 2014 한국산학기술학회 학술대회 Vol.- No.-

다약재 내성을 나타내는 병원성 미생물에 의한 질병이 점점 많아지고 있다. 항생제 내성을 나타내는 유전자가 발현되어 항생제 내성을 나타내게 되고 저항성을 갖는다. 본 논문에서는 병원성 미생물인 methicillin-resistance Staphylococcus aureus (MRSA)가 다약재 내성을 나타내고 있는 것을 확인하고 다약재 내성을 나타나게 하는 유전자의 종류를 규명하고자 하였다.