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Park, Gwi Ok,Yoon, Jeongbae,Park, Eunjun,Park, Su Bin,Kim, Hyunchul,Kim, Kyoung Ho,Jin, Xing,Shin, Tae Joo,Kim, Hansu,Yoon, Won-Sub,Kim, Ji Man American Chemical Society 2015 ACS NANO Vol.9 No.5
<P>To monitor dynamic volume changes of electrode materials during electrochemical lithium storage and removal process is of utmost importance for developing high performance lithium storage materials. We herein report an <I>in operando</I> probing of mesoscopic structural changes in ordered mesoporous electrode materials during cycling with synchrotron-based small angel X-ray scattering (SAXS) technique. <I>In operando</I> SAXS studies combined with electrochemical and other physical characterizations straightforwardly show how porous electrode materials underwent volume changes during the whole process of charge and discharge, with respect to their own reaction mechanism with lithium. This comprehensive information on the pore dynamics as well as volume changes of the electrode materials will not only be critical in further understanding of lithium ion storage reaction mechanism of materials, but also enable the innovative design of high performance nanostructured materials for next generation batteries.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2015/ancac3.2015.9.issue-5/acsnano.5b01378/production/images/medium/nn-2015-013783_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn5b01378'>ACS Electronic Supporting Info</A></P>
물분사 위치 및 시기에 따른 흡기 온도 저감 특성 연구
박정배(Jeongbae Park),김주일(Jooil Kim),박태준(Taejun Park),천민우(Minwoo Cheon),이대엽(Daeyup Lee) 한국자동차공학회 2019 한국자동차공학회 부문종합 학술대회 Vol.2019 No.5
The cooling effect due to evaporation of water when it is injected in intake port is well known. Optimum design of direction and timing of water injection is important in order to maximize the temperature drop(about 13℃ in this work) to lower NOx emissions by water injection in a large generator engine. The aim of this study is to minimize the wetting of the wall surface of the intake port and optimize the location of nozzle in head block.
박정배(Jeongbae Park),민성기(Seongki Min),이세영(Seyoung Lee),김영신(Youngsin Kim),이종철(Jongchul Lee),장기원(Kiwon Jang) 한국추진공학회 2011 한국추진공학회 학술대회논문집 Vol.2011 No.5
연료탱크 내부에 존재하는 공기는 저장중 연료의 산화를 유발하고, 연료 이송성능을 저하시킬 수 있다. 따라서 항공기 연료탱크의 주유절차를 개선하기 위하여 연료탱크 내부에 존재하는 공기를 줄이는 방안으로 진공주유방식을 제안하였다. 본 논문에서는 진공주유 절차를 수립하여 실제 시험을 수행해 보았고, 이를 통해 진공주유중 발생하는 현상을 관찰할 수 있었다. 또한 탱크 내부의 기포 및 주유시간 절감을 위하여 다른 개선된 방안들을 제안하였다. The air remained in the fuel tank could cause oxidation of fuel during storage, and it also reduce the fuel transfer performance. To find better procedure for refueling of aircraft fuel tank, the vacuum refueling process was proposed to reduce air in the fuel tank. In this study, the vacuum refueling process established and tested, it could be helpful to find out what happened during vacuum refueling. Also the revised vacuum refueling processes were proposed to reduce the remained air and refueling time for aircraft fuel tank.
고속 비행체 연료공급 및 냉각계통 개념설계 프로그램에 관한 연구
박정배(Jeongbae Park),정성민(Sungmin Jung),김준태(Joontae Kim),신동인(Dongin Shin),박수용(Sooyong Park),최세영(Seyoung Choi) 한국추진공학회 2015 한국추진공학회 학술대회논문집 Vol.2015 No.11
고속 비행체 연료공급 및 냉각계통의 통합설계를 위한 개념설계 도구에 대한 연구를 진행하였다. 프로그램은 Excel VBA (Visual Basic for Applications)로 작성되었으며, GUI를 이용하여 설계 및 해석을 수행할 수 있다. 모델의 형상 및 열환경변수를 입력하고 간략화된 열역학적 관계식을 이용하여 시스템 구성품의 각부 상태량을 계산하고 설계 요구조건 충족을 확인한다. 이에 따른 세부 구성품 규격을 구성하여 적절한 시스템을 설계하는 도구로 사용할 수 있다. This paper reveals that study on conceptual design tool of fuel supply and cooling system for high-speed vehicles. The Program was written in Excel VBA with GUI for efficient design and analysis. Model geometry and thermal environment value were input to program. Each part properties of system component were computed with thermodynamic relation. The results were confirmed for design requirements. Accordingly, it used to suitable design for component specifications.
흡열반응을 적용한 연료공급 및 냉각계통 구성품 시험장치 개발
박정배(Jeongbae Park),이영수(Youngsoo Lee),신동인(Dongin Shin),박수용(Sooyoung Park),최세영(Seyoung Choi) 한국추진공학회 2014 한국추진공학회 학술대회논문집 Vol.2014 No.12
고속비행체의 연료공급 및 냉각계통에 적용되는 연료의 흡열반응을 이용한 냉각 특성을 확인하기 위해 열교환 냉각채널과 이를 시험할 수 있는 시험 장치를 구성하였다. 이를 이용하여 연료의 흡열반응을 일으킬 수 있는 초임계 온도 및 압력 환경을 구현하였다. 시험결과를 토대로 촉매의 연료분해 영향성을 비교 평가함으로써, 흡열 열교환 냉각채널과 촉매의 고속비행체 연료계통 시스템 및 냉각계통에 적용 가능성을 확인하였다. The test system of heat exchanger cooling channel was composed with the aim of researching a fuel cooling characteristic using endothermic reaction on fuel supply and cooling systems of high-speed vehicles. It employed a simulate endothermic reaction caused to the supercritical state of fuel. With this result, Catalyst influenced for fuel cracking was confirmed in comparison to verify applicability of endothermic heat exchanger cooling channel with catalyst to the fuel supply and cooling system of high-speed vehicles.
박정배 ( Jeongbae Park ) 홍익대학교 법학연구소 2015 홍익법학 Vol.16 No.2
The Unified Korea should embody democracy and aim at welfare state. And racial homogeneity should be recovered and integration should be done without discrimination and alienation for North Korean people. To do this, it would be essential to suggest the Legislative plans for the Police Administrative System Integration. We can know that the case of unified German is a very important task for solve Problem in Integration. Above all, The most serious integration challenges in the Unified Korea will be stable establishment of unified nation by integration of the police administrative system. And to do a Study on the Legislative Plans for the Police Administrative System Integration, First, it needs to a comparative study of the current the police administrative system in the Korean Peninsula, a study of the People’s Safety Enforcement Law, the People’s Safety Agency. Through this integration plan, it will be a key issue by a study on the Legislative plans for the Police Administrative System Integration in North Korea. Therefore A plan to foster specialized the Police Administrative System Integration by legislating ‘(temporary name) act for the establishment of the North Korean National Police Agency’ and legislating ‘(temporary name) act for the establishment of the North Korean National Police Administration’ should be considered. And through a Study on the Legislative Plans for the Police Administrative System Integration, It should be to establish a stable the Unified Korean Peninsula.
박정배(Jeongbae Park),이범철(Beomcheol Lee),박성한(Sunghan Park),민성기(Seongki Min) 한국추진공학회 2016 한국추진공학회 학술대회논문집 Vol.2016 No.12
고속 비행체의 연료탱크는 기체에서 연료탱크로의 외부 열전달로 인한 연료의 급격한 온도상승 문제가 발생할 수 있다. 따라서 고속 비행체의 연료탱크에 장착되어 외부 고온의 열이 연료로 전달되는 것을 최소화 할 수 있는 제품의 개발이 필요하다. 본 논문에서는 연료탱크에 장착이 가능하고 내열 및 내유성이 있으며 기체의 팽창에도 견딜 수 있는 탄성을 가진 고무복합체를 개발하였고, 그 구성은 고무층, 보강포, 내유성을 가진 필름, 내열성 접착체로 이루어져 있다. 개발된 고무복합체는 개발 시험을 통해 20℃ 기준에서 30년의 수명을 가지는 것을 확인하였고, 400℃의 운용시험 후 시편 검사에서 외형 및 열전도도 성능에 이상이 없음을 확인하였다. The fuel tank of high speed aircraft has a rapid temperature rise due to outside heat transfer. Therefore, it is necessary to develop the products to minimize the rapid temperature rise of heat to the fuel. This study has developed a rubber composite which has thermal and oil resistance. Also it has elasticity to endure expansion of aircraft body. The rubber composite consists of a rubber layer, reinforcement fiber, a film of oil resistance and a the rmal resistance adhesive. Through the development verification test it has been confirmed that the average life span of the rubber composite is more than 30 years at 20℃ and there is nothing wrong with shapes and thermal conductivity at a specimen test.