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수소에너지 생산, 수송 및 이용에 대한 통합시스템 해석
오병수(Byeong Soo Oh),서석진(Seog Jin Seo) 한국수소및신에너지학회 1998 한국수소 및 신에너지학회논문집 Vol.9 No.1
An energy crisis is expected in near future. Fossil fuel such as oil and natural gas has been used and will be no longer supplied enough to demand in the beginning of coming century. The use of the fuel makes a lot of environmental pollution to threaten human being`s health especially in big cities and produces a lot of CO₂ to make green house effect of the earth. It is the time to use clean fuel such as hydrogen to prevent the expected energy crisis and the pollution. A new engine such as fuel cell can be used instead of the conventional internal combustion engine with 2 to 3 times higher efficiency of the conventional engine. The fuel cell uses hydrogen and oxygen and produces electric energy and pure water, which is a calm engine without air pollution. In big cities the city buses and the taxies powered by hydrogen fuel cells are suggested to be operated for clean environment. A model of the total energy system for production, transportation and utilization of hydrogen is calculated.
배기가스가 없는 수소가스용 터빈엔진에 대한 이론적 해석
오병수(Byeong Soo Oh) 한국수소및신에너지학회 1994 한국수소 및 신에너지학회논문집 Vol.5 No.1
It is very important factor to reduce air pollution from any engines. Some exhaust gases, such as CO₂, NO<sub>x</sub> and SO<sub>x</sub>, are the products by combustion of hydrocarbon fuel and air. Hydrogen is clean energy to keep our environment out of air pollution. In this study a turbine engine system is theoretically developed which produces pure water only with no exhaust gas by combustion of hydrogen and stoichiometric oxygen. The thermal efficiency of the whole system can be calculated by calculation of each part.
수소연료를 사용한 무배기 가스터빈 엔진에 대한 이론적 해석
오병수(Byeong Soo Oh),마현식(Hyun Sik Ma),박주소(Joo Ho Park) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Abstract: It is very important factor to reduce air pollution from any engines. Some exhaust gases. such as CO₂. NOx. and SOx, are the products by combustion of hydrocarbon fuel and air. Hydrogen is clean energy to keep our environment out of air pollution. In this study a turbine system is theoretically developed which produces pure water only with no emission gas by combustion of hydrogen and stoichiometric oxygen. The thermal efficiency of the whole system can be calculated by calculations of each part.<br/>
오병수(Byeong Soo Oh),정진삼(Jin Sam Jung) 한국수소및신에너지학회 1999 한국수소 및 신에너지학회논문집 Vol.10 No.3
The development of hydrogen vehicles has been actively progressed in the developed countries such as U. S., Japan and Germany. The most important technology of using hydrogen fuel is to develope a compatible storage tank with respect to the fossil fuel tank. Among many storage methods, the liquid hydrogen is the most desirable state because of the lowest volume and weight. The metal hydride tank is too heavy and the compressed hydrogen tank is too bulky. Because of these reasons, it is the principal purpose to analyze the theoretical heat transfer for designing and manufacturing an actual LH₂ tank. The insulation methods of the room between inner and outer vessel are non-vacuum, vacuum, vacuum with MLI(Multi-Layer Insulation). According to the results of the numerically calculated heat leak through the walls of the LH₂ tank, the vacuum insulated tank has 20 times and the MLI tank has 5616 times less heat leak than the non-vacuum tank.
COMSOL을 이용한 PEMFC 평행 유로의 Baffle에 의한 출력 특성분석
권오정(Oh-Jung Kwon),오병수(Byeong Soo Oh) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
Among the researches of channel design, there are many researches which focused on forced convection with interdigitated channel and baffle, rather than natural convection phenonenon. In this study, the analysis is proceeded by COMSOL, the multiphysics program, for the fluid flow, pressure and power by the FBB(Fully-Blocked Baffle) in the parallel channel. Because a bipolar plate is considered for the PEMFC unit cell, in which electrode area is 25cm², the domain size was designed for channel length which is 50mm. Because the bipolar plate will be designed for parallel channels, the numerical analysis was calculated for a shape with a single three-dimensional channel. Through this numerical analysis, it was found a characteristic that the gas was gathered again to channel, after gas is passing through the GDL by forced convection. It was found that the fuel cells power was increased by the channel with baffles, more than the channel without baffle.