http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
운전조건에 따른 히트파이프를 이용한 열교환기의 특성에 관한 연구
이영수,장영석,Lee, Y.S.,Jang, Y.S. 대한설비공학회 1990 설비공학 논문집 Vol.2 No.3
The purpose of this research is to study the characteristics of heat exchanger using heat pipe under various working conditions by a finite element analysis and experiment. The results are as follows. 1) In this study, h = $Max^B$ is used for the convective heat transfer coefficient and A = 2.761 and B = 0.701 $Mmax^{(-0.0626)}$ were obtained as the results of experiment. 2) For several different working conditions, (Q/Qb) is predicted by varying the values of L/Lt and Re/Rc. The maximum value of (Q/Qb) is achieved when Re/Rc = 1 and Le/Lc = 0.5. 3) The comparison between calculated value and experimental data showed agreement within 5% error. Therefore the method may be used to predict the performance of heat exchanger using heat pipe for similar geometric conditions. 4) For Re/Re/Rc of 0.2-0.3, the minimum thermal resistance exists when Le/Lt is 0.4-0.65.
홈이 파진 원판증발기를 가진 회전형 히트파이프에 대한 실험적 연구
권순석,장영석,유병욱,Kwon, S.S.,Jang, Y.S.,Yoo, B.W. 대한설비공학회 1993 설비공학 논문집 Vol.5 No.2
The heat transfer characteristics of the rotating heat pipe with a disc evaporator and a grooved condenser have been investigated by measuring temperature distributions of wall and vapor for various thermal inputs and revolutions per minute. The results showed that the heat transfer coefficients of all types are increased with thermal input and revolutions per minute. The heat transfer coefficient of evaporator with groove (pitch=2.5mm depth=1.5mm) is 25.8% higher than that of evaporator without groove at 500RPM, 150W.
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.