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1.5MW 풍력발전시스템 출력 성능시험 및 불확도 분석
김건훈,주영철,김대호,Kim, Keon-Hoon,Ju, Young-Chul,Kim, Dae-Ho 한국태양에너지학회 2006 한국태양에너지학회 논문집 Vol.26 No.4
The installed capacity of wind turbines in KOREA are growing and enlarging by the central government's support program. Thus, the importance of power performance verification and its uncertainty analysis are recognizing rapidly. This paper described the Power testing results of a 1.5MW wind turbine and analysed an uncertainty level of measurements. The measured power curves are very closely coincide with the calculated one and the annual power production under the given Rayleigh wind speed distribution are estimated with the $4.7{\sim}22.0%$ of uncertainty but, in the dominant wind speed region as $7{\sim}8m/s$, the uncertainty are stably decreased to $7{\sim}8%$.
유한 요소 해석 프로그램을 이용한 모듈 내 온도 분포 예측
박영은(Park Young-Eun),정태희(Jung Tae-Hee),고석환(Go Seok-Hwan),주영철(Ju Young-Chul),김준태(Kim Jun-Tae),강기환(Kang Gi-Hwan) 한국태양에너지학회 2016 한국태양에너지학회 논문집 Vol.36 No.2
PV module is installed in various outdoor conditions such as solar irradiation, ambient temperature, wind speed and etc. Increase in solar cell temperature within PV module aggravates the behaviour and durability of PV module. It is difficult to measure temperature among respective PV module components during PV module operating, because the temperature within PV module depends on thermal characteristics of PV module components materials as well as operating conditions such as irradiation, outdoor temperature, wind etc. In this paper, simulation by using finite element method is conducted to predict the temperature of each components within PV module installed to outdoor circumstance. PV module structure based on conventional crystalline Si module is designed and the measured values of thickness and thermal parameters of component materials are used. The validation of simulation model is confirmed by comparing the calculated results with the measured temperatures data of PV module. The simulation model is also applied to estimate the thermal radiation of PV module by front glass and back sheet.
전기동력 무인항공기의 추진시스템 효율 추정에 관한 연구
안일영,양용만,주영철,박상혁,배재성,Ahn, Il-Young,Yang, Yong-Man,Ju, Young-Chul,Park, SangHyuk,Bae, Jae-Sung 한국항공운항학회 2015 한국항공운항학회지 Vol.23 No.3
In the present study, we conducted the research on the high efficiency propulsion system for the development of long-endurance UAV with an electric propulsion system. For the long endurance UAV, fair aerodynamic characteristics with the high efficiency of the propulsion system is required because the flight power and the duration time of the long-endurance UAV vary greatly depending on the efficiency of the propulsion system. Therefore, in this study, the tracking program which records the performance of motor, propeller was developed because of their wide variation in the efficiency depending on the using condition, and records from the existing flight test program were utilized to check the accuracy of the program we had developed. For the development of future long-endurance solar UAV, we confirmed the applied voltage of motor, the optimal rotation of propeller and the gear ratio of reduction gear in order to get the highest efficiency on the propulsion system at the optimal flying condition.