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설치장소에 따른 태양열 스털링엔진 발전시스템의 성능예측에 관한 연구
배명환,장형성,강상율 경상대학교 생산기술연구소 2001 工學硏究院論文集 Vol.1 No.-
The simulation analyses of a dish solar power system with stilling engine in this study are applied to system performance prediction in four different test sites; Seoul, Pusan and Cheju in Korea, and Naha in Japan. The effects of difference of concentrator type such as monolithic and stretched-membrane construction on system efficiency are also evaluated. The total amount of generated power for a year depends on the site. However the total maximum system efficiency in every site is approximately 16% and there isn't a striking difference. It is also found that the maximum collector efficiency of stretched-membrane concentrator Is about 3 ∼ 15% lower than that of the monolithic type.
김형섭,장형성 한국산업안전학회 1990 한국안전학회지 Vol.5 No.1
A comprehensive cycle simulation was developed to predict the performance of gasoline engine including intake and exhaust systems with variation of operating conditions and design factors. In this study, the gas exchange model, compression and expansion model, two-zone combustion model and heat transfer model were used. In order to confirm the feasibility of the simulation program, the calculated results were compared with experimental results. P-θ diagrams, I. M. E. P. and S. F. C by means of calculation showed acceptable quantitative agreement with the experimental data. Therefore, this program is particularly well adapted to indicating the direction of the optimal design and optimal operating conditions for gasoline engine.
자동차 기관용 전자제어 연료분사 및 점화시기 제어기 개발
양성환,김태훈,민규식,장형성 한국산업안전학회 1995 한국안전학회지 Vol.10 No.4
In this paper, an electronic control unit is developed using 16bit microcomputer for automobile engine. This system incorporate AFS(Air Flow Sensor) of Hot Wire type, DIS(Direct Ignition System), ISC(Idle Speed Control) system, CAS(Cranke Angle Sensor) and other peripheral device. This system includes hardware and software to facilitate precision control of both fuel injection and ignition timing. Especially, this controller consists of position signal(180 teeth) and 4 REF signals. Present system has maximum 720℃A delay. But this system has maximum 180℃A. Thus, this system is able to precision control both fuel injection and ignition timing.
4 사이클 전기점화기관에서 흡 · 배기관내 비정상 유동특성 해석에 관한 연구
김태훈,민규식,정수진,장형성 한국산업안전학회 1994 한국안전학회지 Vol.9 No.2
This study discribes result of comparision of two other numerical method, method of characteristics (MOC) and Lax-Wendroff method(LWM) applied at wave action analysis of intake and exhaust pipe. Partiality FCT(Flux Correct Transport) scheme is appeneded to LWM to protest unacceptable overshoots, occuring near discontinuity. The final conclusion of this study is that MOC should be replaced by a second order finite difference approach(such as the LW methods). Clear benefits we can get by change are faster calculation, higher accuracy, conservation of mass and consistent calculation method.
하성용(Sung Yong Ha),장형성(Hyung Sung Jang),박정원(Jung Won Park) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Analyzing how the E-Learning technical training course affects the student's achievement and satisfaction, results of the study are as below. The purpose of this study is to improve technical training courses by surveying the students analyzing achievements and satisfactions of students those who took the E-learning technical training cours. It was mostly a psychological effect such as easy access to the course, well mixed interesting elements, requests being satisfied and direct contact with tutors. E-Learning technical training course would be a good method that can improve the quality of learning and reduce the burden of an on-line class by being free from a physical learning environment. The conclusion from the students was that E-Learning training needs an appropriate design and operation strategy that fits the curriculum technical training curriculum.