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원전 비상디젤발전기 EGB 조속기의 정비주기에 따른 운전특성 변화 고찰
윤영철(Y C. Yun),김오근(O G. Kim),김영철(Y C. Kim),김명훈(M H. Kim) 유공압건설기계학회 2017 유공압건설기계학회 학술대회논문집 Vol.2017 No.11
The EGB governor with 16PC-2.5V diesel engines takes the largest proportion of EDG type in Korean N.P.P. We were investigated operating characteristic changing of EGB governor according to Maintenance interval. As a result, the change of speed setting did not change until 3 years after maintenance but the maximum change was 31 rpm after 6 years. Other changes in operating characteristics were slight change. The change of speed setting is changed the speeder spring tension and worn flyweight toe, that caused by the vibration due to various performance tests of the EDG like rapid load change and fast start.
저온에너지 회수용 히트파이프의 작동유체 특성에 관한 연구
전철호(C. H. Jun),장영석(Y. S. Jang),김오근(O. G. Kim),장도원(D. W. Jang),정상욱(S. W. Jung) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.10
The resources which is limit loses and the research of alternative energy actively is become accomplished. Also the method which uses the waste heat which the wool which it will write comes to think without again is discussed. Also uses fossil fuel and as plentifully to get neither the environment problem against the CO₂ which becomes will be able to think. Being a break with that reason, it used the heat pipe which is heat transfer machine of the high performance and the test research against the method low-density heat-source frequency it did. Low-density heat-source of the entrance it will measure consequently in temperature and the possibility where it will know the use effect of energy it was. Also gave the change of flow and enthusiasm delivery efficiency of heat pipe which made working fluid with the acetone comparison and it will be able to analyze. Against the method which from this time research applies low-density heat-source with alternative energy it will be able to confirm as a numerical value.
전철호(Jun C.H.),장영석(Jang Y.S.),김오근(Kim O.G.) 한국태양에너지학회 1997 한국태양에너지학회 논문집 Vol.17 No.1
본 연구에서는 히트파이프의 제어를 전자밸브에 의하여 단속 되어질 때 증발부의 상태변화가 응축부에 미치는 전열제어 특성을 연구한 것이다. 증발부와 응축부사이의 단열부에 전자밸브를 설치하여 증발부의 열저장에 따른 밸브제어의 영향, 밸브주기 개폐에 따른 응축부의 응답특성, 경사도, 입열량, 냉각수량변화가 전열에 미치는 연구를 실행하고 증발부와 응축부의 유동특성을 고찰하여 전자제어밸브에 따라 증기으 동특성영향을 연구한다. 그 결과는 응축부와 증발부사이의 온도차가 크면 온도의 진동수는 증가하고, 온도의 진폭은 감소한다. 제어밸브의 개폐시간이 지연되면 증발부의 펄스비등은 강하게되고 밸브개폐후 응축부의 온도 진동은 지연 감쇄한다. The purpose of this research is the study of characteristics of heat transfer in a heat pipe controlled by solenoid valve. A solenoid valve located to the adiabatic section between evaporator and condenser of heat pipe was used to control the valve action for effective energy transfer of the industrial exchanger machine. By the results presented in this study temperature difference between evaporator and condenser increases with increasing the temperature frequency and with decreasing the temperature amplitude. When inclination angle and flow rate of cooling water increases, the temperature amplitude is reached to the steady state rapidly with increasing the temperature frequncy.
히트파이프를 이용한 고온 폐열 가스 회수를 위한 실험적 연구
전철호(C. H. Jun),장영석(Y. S. Jang),김오근(O. G. Kim),정상욱(S. W. Jung),장도원(D. W. Jang) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.10
The range of temperature of heat pipes that are generally used nowadays is between -150℃ and 350℃ and they belong to low-temperature heat pipes. Therefore there are many materials about the working fluid of these heat pipes. But more researches about working fluid are needed in the wide range of temperature with the extension of the use of heatpipes. Especially the researches and materials about the working fluid between 400℃ and 1000℃ which can be used to operate a boiler are much more needed. If we see the working fluid of middle-high temperature heatpipes, we can tell the degree of mercurial content. But it is not so easy to use mercury in the experiment because of the danger of dealing with it. The purpose of this experiment is to compare and evaluate the characteristics of several working fluids which are used between 400℃ and 1000℃ according to the variation of heating temperature and the inclinatory degree of heatpipes. Before making this experiment, I carried out an experiment In which range of temperature Dowtherm - that is largely used as a middle-high temperature working fluid - has the highest efficiency? according to the variation (500℃ ~ 1000℃) of only heating temperature. And I will compare and evaluate which working fluid is more appropriate than other working fluids under the given condition in the next experiment.