http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
고체 폐기물 연료의 유동상 연소 : 연료 특성 및 운전 인자 변화에 따른 연소 특성
최진환(Jinhwan Choi),박영호(Youngho Park),최상민(Sangmin Choi) 대한기계학회 2001 대한기계학회 춘추학술대회 Vol.2001 No.3
Combustion characteristics of selected solid fuels (wood, paper sludge, RDF) were investigated in a laboratory scale fluidized bed combustor. A nearly single particle combustion environment was reproduced in the fluidized bed and the progress of reaction was observed by determining the carbon conversion rate, overall recovery of carbon in gas phase, and the mean conversion time, which were determined by measuring the gas phase carbon containing species, namely CO and CO₂ at the exit of the combustor. The aims were to determine the influence of the operating parameters and the fuel characteristics on the pyrolysis and combustion processes of the fuel. The parameters were bed temperature, air flow rate, oxygen concentration, water content, and the size of particle. The particle combustion process can be divided into three significant processes; moisture evaporation, devolatilization, and char combustion. All the processes were governed by the heat up process of the particle. The results also showed that the weak effect of oxygen concentration and flow rate on devolatilization. But remarkable effect on char combustion was shown. Bed temperature, size and water content affected the processes of particle combustion to some extent. Drying and devolatilization occur in parallel during the initial phase but char combustion take place either in parallel or in series by the fuel type.
화순항내 준설토사의 양빈재 유효활용을 위한 적합성 평가
최진환(Choi, Jin-Hwan),이상혁(Lee, Sang-Hyeok) 한국산학기술학회 2015 한국산학기술학회논문지 Vol.16 No.4
화순항에서 유효활용을 위한 준설토의 오염도 분석결과, Ni이 기준치를 전지점에서 초과하는 것으로 나타났다. 그러 나 개정된 유효활용기준에 의하면 기준치를 초과하더라도 인위적인 오염원이 없고 펄의 평균 무게 비율이 10%미만이며 생 태독성 시험을 통과하였을 경우 양빈재로 활용이 가능하다. 따라서 연구방법으로 해양환경공정시험법에 의한 펄의 평균무게 비율조사와 생태독성실험을 실시하였다. 펄의 평균 무게 비율은 5.37%로 기준치인 10%을 하회하는 것으로 조사되었다. 발광 박테리아를 이용한 생태독성실험 결과는 상대발광저해율이 0∼9.13%로 독성없음으로 판정되었으며 저서성 단각류를 이용 한 시험에서도 대조구와 시료의 상대평균생존률이 0%로 독성없음으로 판정되었다 따라서, 개정된 유효활용기준을 모두 만 족하므로 양빈재로 사용이 가능한 것으로 적합성이 평가되었다. Dredged materials for effective use in Hwasun-port pollution analysis, Ni(nickel) in excess of the standard showed that the whole point. However, according to the revised standards effective utilization exceeds the reference value, even if no anthropogenic sources Pearl ratio less than 10% of the average weight of the ecotoxicological tests have passed, and if so it can be used to beach nourishment. Therefore, the average weight ratio of pearl and ecotoxicological tests were conducted by marine environment official test method. Mud to 5.37% of the average weight ratio lower than the reference value of 10% that was investigated. Ecotoxicity test using bioluminescent bacteria relative luminescence inhibition in the 0 to 9.13% with no toxicity was determined using benthic amphipods in the control and the test sample relative to the average survival rate is 0% with no toxicity was determined. Therefore, the revised effective use meets all the criteria that can be used to beach nourishment, so that the suitability was assessed.
수위에 따른 이용 가능한 취식지 면적의 변화와 월동 수금류와의 관계
최진환(Jin-Hwan Choi),문영민(Young-Min Moon),신주열(Joo-Yeol Shin),유정칠(Jeong-Chil Yoo) 한국조류학회II 2010 한국조류학회지 Vol.17 No.4
본 연구는 수위 변동에 따른 수심별 면적의 변화 양상이 월동 수조류 종별 개체수의 변동에 미치는 영향을 파악하기 위하여 2009년 12월부터 2010년 2월에 걸쳐 경상남도 창원시에 위치한 주남저수지 일대에서 수행되었다. 수심을 ‘50cm 이하’, ‘50∼100cm’, ‘100cm 이상’의 3개 항목으로 나누어 각 항목별 면적과 각 종의 개체수 간 상관관계를 분석하였다. 분석 결과 동판저수지에서는 큰고니(r=0.77, p<0.05), 큰기러기(r=0.80, p<0.05)가 수심 50cm 이하 면적과 유의한 상관관계가 있었고, 흰죽지는 수심 50cm 이하 면적(r=-0.86, p<0.05), 50∼100cm 면적(r=-0.91, p <0.01), 100cm 이상 면적(r=0.92, p<0.01)과 모두 유의한 상관관계가 있었으며, 댕기흰죽지와 흰비오리는 수심 50cm∼100cm 면적(각각 r=-0.84, p<0.05; r=-0.82, p<0.05), 100cm 이상 면적(각각 r=0.78, p<0.05; r=0.82, p<0.05)과 유의한 상관관계가 있었다. 산남저수지에서는 물닭이 수심 50cm 이하 면적과 유의한 상관관계가 있었으며(r=0.76, p<0.05), 주남저수지에서는 유의한 상관관계가 있는 종이 없었다. This study was conducted to find out population fluctuation pattern of wintering waterfowl in relation to foraging area availability caused by water level variation in Junam Reservoir Area located in Changwon, Kyungsangnam-do from December 2009 to February 2010. Water depth was categorized as ‘below 50cm-depth’, ‘between 50∼100cm-depth’, and ‘over 100cm-depth’. Correlation between area of each depth category and abundance of each species was analyzed. In Dongpan Reservoir, Whooper swans(r=0.77, p<0.05) and Bean geese(r=0.80, p<0.05) were significantly correlated with the area below 50cm-depth and Common pochards were significantly correlated with the area of all depth categories(r=-0.86, p<0.05; r=-0.91, p<0.01; r=0.92, p<0.01, respectively). Tufted ducks and Smews were significantly correlated with the area between 50cm∼100cm-depth(r=-0.84, p<0.05; r=-0.82, p<0.05, respectively) and the area over 100cm-depth(r=0.78, p<0.05; r=0.82, p<0.05, respectively). In Sannam Reservoir, Coots(r =0.76, p<0.05) were significantly correlated with the area below 50cm-depth. In Junam Reservoir, no species was correlated with the area of any depth category.
바코팅에 의해 제조된 그래핀 옥사이드 필름의 전기적 특성에 미치는 아민 화합물의 영향
최진환 ( Jin Whan Choi ),이슬비 ( Seul Bi Lee ),이성민 ( Seong Min Lee ),박완수 ( Wan Su Park ),정대원 ( Dae Won Chung ) 한국공업화학회 2015 공업화학 Vol.26 No.3
We prepared films by a bar-coating of various graphene oxide (GO) pastes by varying pH with amine compounds. The thermal treatment of films at 150 ℃ and measurement of surface resistances exhibited that the pH variation does not significantly affect the surface resistance. We, however, found that the addition of amines reduced the surface resistance by approximately 10 times and N,N-dimethylethanolamine (DMEA) showed the most significant effect among all amines investigated. XPS studies demonstrated that the addition of DMEA accelerated the reduction reaction of GO, and finally enhanced the electrical properties of GO films.