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차량 흡기시스템의 냉각공기 유로 개선에 의한 통합 시동발전기용 단기통 디젤엔진 및 보조전원공급장치의 출력성능 향상
이태의(Tae Eui Lee),Andreas Stabel,이가영(Ga Young Lee) 대한기계학회 2022 大韓機械學會論文集B Vol.46 No.6
최근 차량 전기 · 전자 장비의 첨단화로 인해서 추가적인 전원공급을 위해 고출력의 초소형 엔진을 이용한 보조전원공급장치(APU)의 수요가 증가하고 있다. 이에 본 연구에서는 매우 제한된 공간에서 최소의 설계 개선으로 기존에 사용하지 않는 플라이휠의 냉각 공기를 단기통 수랭식 엔진 흡기시스템으로 재순환시키고, 발전기 고정자 철심의 적층 면적을 증가하는 방법으로 엔진 및 전기적 발전출력을 향상시키기 위한 실험적 연구이다. 엔진 상태에서는 성능 변수(토크, 출력 등) 등을 분석하였고, 완성품 발전시스템에서는 부하에 따른 전압 · 전류 등의 출력특성 변화를 실험하였다. 본 실험 결과에 따르면 수랭식 디젤 엔진 3,000 rpm 조건에서는 평균 8.7%의 출력증가를 나타내었고, 통합 시동형 APU 시스템 상태의 전기적 발전출력 성능은 최소 12.7%가 증가한 10.16 kW(363 A)로 나타났다. Due to the recent technological advancement of vehicles and electronic equipment, the demand for additional power supply by auxiliary power units (APU), using small diesel engines (less than 14 kW), is increasing. Therefore, this experimental study was conducted to investigate the improvement of the engine and electrical power output by recirculating the cooling air of the flywheel using an improved air intake system design consisting of a water-cooled single cylinder engine; and by increasing the area of the limited space in the generator stator iron. The engine performance parameters were analyzed and changes in the output characteristics of the generation system, such as voltage and current, were tested. From the results, the diesel engine exhibited an average power increase of 8.7% at 3,000 rpm while in the electrical power state, and the generation output was 10.16 kW, which corresponds to a 12.7% (363 A) increase in output.
궤도차량용 보조동력장치 엔진룸 내부 열유동 특성에 관한 연구
이태의(Tae Eui Lee),서정세(Jeong Se Suh),정성환(Sang Hwan Jeong),박영식(Young Sik Park) Korean Society for Precision Engineering 2009 한국정밀공학회지 Vol.26 No.12
This research is intended to grasp the characteristics of heat flow inside auxiliary power device engine room to obtain the design basic data through numerical analysis and experiment. For experiment cost reduction, numerical analysis was done to obtain quantitative data by observing the change in temperature distribution of major parts according to changes in normal condition, incompressible condition, engine surface heat emission rate and absorption temperature with the use of commercial STAR-CD. The experiment was done by grasping the temperature distribution of major interested parts inside engine room in loaded and unloaded conditions during engine operation. The temperature distribution data here will serve as useful design data during APU engine room designing.
궤도차량용 보조동력장치 룸 내부 열유동에 관한 수치해석
이태의(Tae Eui Lee),이중섭(Chung Seob Yi),홍정규(Jeong Kyu Hong),윤지훈(Ji Hun Yun),서정세(Jeong Se Suh) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.6
This study is numerical analysis on thermal and flow in the auxiliary power unit for tracked vehicle. At the tracked vehicle for army or the commercial vehicle etc., the auxiliary power unit supply the emergence power which is needed when its main engine is stopping or driving. The results of the simulation show that mean temperature was increased mass flow rate at engine outlet. In the case that the mass flow rate is 0.27kg/s, it was verified that, as the mass flow rate went down, the temperature distribution at the center cross section of the engine was increased a little. For the verification of numerical analysis, at the comparison results from the numerical analysis and the test on the engine cylinder head, outlet and motor, it was verified that the results are almost same as the gap of temperature within the range of 3K.