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이재규(J.K.Lee),최성호(S.H.Choi) 충북대학교 동물생명과학연구소 2017 동물생명과학연구 Vol.9 No.-
This review article was written to find out the using domestic produced forage and winter feed crops in Korea. In terms of the production environment of Korean beef cattle, the income of the beef cattle farmer can only be achieved through reduction of production cost. Korea, which imports most of the forage including the concentrate, is likely to reduce the production cost by increasing the self-sufficiency rate of the forage. However, in Korea, it is desirable to produce forage crops using the agricultural land in the winter because there is not enough agricultural land to use for the production of the forage in the summer season. In addition, because of the farmland conditions in Korea, except for the western part, it is a mountainous area. Therefore, it is also necessary to study the cultivation system for growing forage crops in the disadvantageous area of forage production. Nevertheless, the production of self-supporting forage using winter farmland will contribute to the reduction of production cost in domestic cattle farming business.
[論文] 單氣筒 4行程 디젤機關의 吸排氣過程 시뮬레이션 硏究
이재순(J. S. Lee),이재규(J. K. Lee) 한국자동차공학회 1990 오토저널 Vol.12 No.3
The computer program for the prediction of the volumetric efficiency of 4-cycle single cylinder diesel engine was developed using the characteristic method which considers the effects of friction, heat transfer and specific heat.<br/> The results of calculation by this program are as follows;<br/> 1. The back flowing was arised at the beginning and the closing stage of inlet valve, and the<br/> back flowing mass and velocity decrease as the engine speed increases.<br/> 2. The volumetric efficiency varies with the engine speed and the length of inlet manifold.<br/> There was an optimum length of inlet manifold for each specified engine speed.<br/> 3. The pressure fluctuation and friction effect in the inlet manifold became very important factors for the determination of the volumetric efficiency.
김대철(D. C. Kim),이재규(J. K. Lee),강영선(Y. S. Kang),이재천(J. C. Lee) 유공압건설기계학회 2009 드라이브·컨트롤 Vol.6 No.3
The major system of an agricultural power-shift tractor is the transmission, using power-shift. Because the transmission performance depends on the hydraulic control system, the most important aspect of the optimization is the design of the hydraulic control system. This study was conducted to improve a pressure modulation characteristics of the power-shift transmission hydraulic system. It has been tried to replace an existing pressure modulation method with a digital control by using HSSV(High Speed Solenoid Valve). The performance of the PWM control system in power-shift hydraulic transmission has been evaluated by means of experiment.
파력-해상풍력 연계형 복합발전 전용 통합감시제어시스템 프로토타입 설계
이상엽(S.Y. Lee),이재규(J.K. Lee),김태형(T.H. Kim),함경선(K.S. Ham) 한국해양환경·에너지학회 2016 한국해양환경공학회 학술대회논문집 Vol.2016 No.5
본 연구에서는 파력-해상풍력 연계형 복합발전시스템에 적용된 통합감시제어시스템의 프토토타입 설계를 통해, 파력 및 풍력발전의 유/무효전력을 모니터링하고 계통과 연계된 전력제어 기능검증을 위한 시뮬레이션 연동 시스템 설계구조를 제안한다. 본 논문에서는 복합발전 전용 통합감시제어시스템 SCADA(Supervisory Control and Data Aquisition) 설계에 필요한 프로토 타입 형태로 개발되는 시스템 사양과 구현 방법에 대해 소개한다. In this research, it is suggested system design architecture of power monitoring and control based on system simulation through supervisory control and data acquisition prototype system design for the wave and wind hybrid power generation system. And prototype system specification and realization for the design of hybrid power generation SCADA system is introduced.