http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
추홍록,김창수,김태권 한국기계기술학회 2008 한국기계기술학회지 Vol.10 No.4
Generally, the characteristics of battery cover has been effected on the expected life span and durability of battery. In this study, the heat shield performance of battery cover was investigated experimentally. Also, the cooling effect of battery for each conditions(material and structral conditions of battery cover) was investigated. As the results, the heat shield performance for heating case is excellent in the case of thickness increasing of battery cover. The characteristics for heating case is more effected on the thermal damage than that of cooling case.
Glass wool과 Formed mat의 열차폐성능 특성
추홍록,김창수,김태권 한국기계기술학회 2008 한국기계기술학회지 Vol.10 No.4
An insulator is widely used for automobile parts to protect the thermal damage and noise from the engine. In this paper, the heat shield performance of insulator in the automobile parts has been investigated experimentally. Also, the experimental results are compared with the numerical analysis. It was tested for the effects of heating temperature and insulator material on heat shield performance. As a results, in the range of heating temperature 95℃∼175℃, the heat shield performance is enhanced with increasing heating temperature. Furthermore, glass wool and Formed mat have similar heat shield performance. So, it is very effective to use the glass wool as insulator in the range of 95℃∼175.
수직 평행채널의 벽면에 부착된 단일 모듈의 3차원 자연대류 열전달
추홍록,유갑종,김현우 경북대학교 산업기술연구소 1996 産業技術硏究誌 Vol.24 No.-
The present experimental study investigated the 3D natural convection heat transfer in a parallel vertical channel with protruding single module on the PCB. The materials used for the vertical PCB was epoxy-resin. Air was used as the cooling fluid. The flow fields in the channel was visualized by means of the smoke-method. Also, local temperature measurements were made along the vertical PCB. Results were obtained for channel ratios of 0.2, 0.3, 0.4, 0.5, 0.7, 0.9, 1.2, 1.5 and ∞, Rayleigh numbers ranging from 4.94×10 exp (3) to 8.02×10 exp (6) and the module thickness ratios of 0.1, 0.2, 0.3. By analyzing the experimental results, the mean Nusslet number increased as module thickness ratios increased. Correlation relating the mean Nusselt number to the modified channel Rayleigh number is proposed.
단일 모듈이 부착된 수직 평행채널내의 3차원 자연대류 열전달에 관한 수치해석
추홍록 대구보건대학 2002 대구보건대학 論文集 Vol.22 No.-
3-D natural convection heat transfer in a vertical parallel channel with protruding single module was investigated numerically. The particular interest was in the removal of thermal energy from the module by convective heat transfer. The commercial code based on the finite volume method, PHOENICS was used to obtain velocity vectors and temperatures. Heat transfer characteristic was promoted at the lower corner of the module and was decreased at the upper corner due to recirculation zone. For the range of 8.28×10³ < Ra^(*)_(c) < 3.48×10^(6), a useful correlation of mean Nusselt number was proposed as a function of modified channel Rayleigh number. In addition the temperature of the module surface was strong1y affected by channel ratio and with the increasing channel ratio, the effect was decreased.
추홍록,상희선,이병화 한국산업안전학회 1998 한국안전학회지 Vol.13 No.4
The vortex tube is a simple device for separating a compressed gaseous fluid stream into two flows of high and low temperature without any chemical reactions. Recently, vortex tube is widely used to local cooler of industrial equipments and air supply system. The phenomena of energy separation through the vortex tube was investigated experimentally. This study is focused on the effect of the diameter of cold end orifice diameter on the energy separation. The experiment was carried out with various cold end orifice diameter ratio from 0.22 to 0.78 for different input pressure and cold air flow ratio. The experimental results were indicated that there are an optimum diameter of cold end orifice for the best cooling performance. The maximum cold air temperature difference was appeared when the diameter ratio of the cold end orifice was 0.5. The maximum cooling capacity was obtained when the diameter ratio of the cold end orifice was 0.6 and cold air flow ratio was 0.7.
공기공급 시스템에 적용되는 Vortex Tubes 의 에너지 분리특성에 관한 연구(2) : 표면의 단열효과에 따른 영향 the effect of surface insulation
추홍록,유갑종,방창훈 한국산업안전학회 1999 한국안전학회지 Vol.14 No.1
The vortex tube is a simple device which splits a compressed gas stream into a cold stream and a hot stream without any chemical reactions. Recently, vortex tube is widely used to 1ocal cooler of industrial equipments and air supply system. In this study, the insulation effect of surface on the efficiency of vortex tube was performed experimentally. The experiment is carried out for nozzle area ratio of 0.194, diameter ratio of cold end orifice of 0.6 and input pressure ranging from 0.2Mpa to 0.5Mpa. The purpose of this study is focused on the effect of surface insulation of vortex tube with the variation of cold air mass flow ratio. The results indicate that the temperature difference of cold and hot air are higher about 12% and 30% than that of not insulated vortex tube respectively. Furthermore, for the insulated vortex tube, the similarity relation for the prediction of cold end temperature as the function of cold air mass flow ratio and input pressure is obtained.