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오병수(B . S . Oh),마현식(H . S . Ma),박주호(J . H . Park) 한국수소및신에너지학회 1994 한국수소 및 신에너지학회논문집 Vol.5 No.2
In this study hydrogen gas and oxygen gas are used to make a pollution-free engine which is a closed system with the components such as a combustor, two turbines, a radiator and a compressor. One of the two turbines produces main power, and the other is used to drive a compressor to compress unburned gases and to return them to the combustor. Some of the water from the radiator is pumped to cool down the internal wall of the combustor and to be used as a working fluid which expands from liquid state to vapor state to get more expansion work. The possibility of operating the whole system is checked by the thermodynamic analysis to make the closed engine system. The calculations in the thermal analysis are based on the Brayton cycle and the Rankine cycle. The closed system in this study shows similar efficiency as usual internal combustion engines, but it produces water only without air pollution such as NO<sub>x</sub> and soot.
수소와 산소를 이용한 가스터빈의 구동에 관한 실험 연구
강진성(J . S . Kang),오병수(B . S . Oh) 한국수소및신에너지학회 1997 한국수소 및 신에너지학회논문집 Vol.8 No.1
Because of environmental pollution and reserve limitations of fossil fuels, several alternative energies have been developing. One of them, the hydrogen is researched as a highly probable solution. In this study pure hydrogen gas and oxygen gas are burned in combustor to reduce the emission, and a gas turbine is used. Cooling water around the combustor recovers the cooling heat loss to useful work by being expanded from liquid to vapor, being injected into the combustor and making pressure rise with working fluid to get more turbine power. Because pure hydrogen and oxygen are used, there is no carbonic emission such as CO, CO₂, HC nor NO<sub>x</sub> and SO<sub>x</sub>. The power is obtained by turbine system, which makes lower noise and vibration than any reciprocating engine. Running of a turbine is searched under various conditions of hydrogen flow rate and water injection rate. Maximum speed of the turbine is obtained when the combustion reaches steady state. It is enable to determine the optimum rate between hydrogen flow and water injection which makes turbine run maximum speed.
정귀성(K . S . Jung),오병수(B . S . Oh) 한국수소및신에너지학회 1998 한국수소 및 신에너지학회논문집 Vol.9 No.1
Most of today`s energy supply is obtained from fossil fuels. Despite of high energy density, higher store efficiency and long mileage, fossil fuels cause environmental pollution and their reserves are limited. In this study pure hydrogen gas and oxygen gas are burned without the emission of pollution. A gas turbine is used to obtain power. Water is injected into a combustor, which prevents overheating and recovers cooling heat. Excessively supplied water is recirculated. With variation of mass flow rate and equivalence ratio, the affection of water injection rate and the temperature of injected water on efficiency and power are experimented. Injected water gets cooling heat, is expanded from liquid to vapor and raises the thermal efficiency. It is enable to determine the rate of water injection, which makes the maximum power. The increase of temperature of water injection raises the efficiency of the system.
박창권(C.G.Park),오병수(B.S.Oh),문훈영(H.Y.Moon) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_2
The purpose of the paper is to analyze heat transfer within a running tire and to evaluate temperature variation. Geometry of the tire as well as the governing equation in physical domain is transformed into those in computational domain by boundary-fitted coordinates. An<br/> unsteady three-dimensional heat conduction equation is solved with heat convecton and radiation boundary conditions. The governing equation includes the conduction. convection and radiation terms. In this paper. we compared the numerical solutions with the experimental results. We know that the highest temperature region is the shoulder of tire. The result of this analysis coincides with the experimental one.<br/>
임태형(T. H. Lim),오병수(B. S. Oh),이홍선(H. S. Lee),양순용(S. Y. Yang) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
The purpose of this paper is pulsation-analysis of the swash plate type axial piston pump for excavator and the method of side branch hose application, which is used normally in construction equipments. In this paper, draw the mathematical modeling for pressure pulsation mechanism of the swash plate type axial piston pump for excavator, expression the flow pulsation in the pipelines by transfer matrix method, programmed simulation for pulsation by AMEsim software, and the reliability of that was verified by the comparison with the experimental results.