• Journal of Advanced Marine Engineering and Technology
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• 제21권4호
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• pp.421-429
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• 1997

This study is theoretically examined the influences on the performance of diesel engine super¬charged by exhaust gas turbine with the change of excess air factor, admission ratio, total efficien¬cy of turbine and compressor, scavenging pressure ratio, and scavenging temperature. In this study, all calculations are carried out by computer, and the theoretical engine performance is com¬pared with the actual engine performance which is offered from engine manufacturer. Following results are acquired by this study. The mean effective pressure is increased with decrease of excess air factor or increase of scavenging pressure ratio. As the admission ratio or total efficiency of tur¬bine is increased, the mean effective pressure is increased but the specific fuel consumption is decreased. Mean calculation error compared with the actual engine performance is under 5 per¬cents, therefore, this calculation method can be used in the design of diesel engine.

• 대한설비공학회지:설비저널
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• 제18권4호
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• pp.365-388
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• 1989

열병합발전시스템은 엔진 또는 가스터빈구동의 열병합발전설비이며, 전력과 열을 동시에 이용함으로써 높은 총합열효율이 기대되는 열원시스템이다. 그 경제성은 전력과 열의 수요가 년간을 통해서 안정하게 존재할 것이 필요조건으로 된다. 본보는 일년간의 운전기록을 사용하여 현재 가동하고 있는 시스템의 특성, 전력수요와 열부하의 실태를 분석하여 개략적으로 설명하는 것이다. 해석에 사용된 자료는 시간단위의 계획치, 적산치이며, 데이터입력후의 인산, 통계, 도표 작성등은 전부 전산기시스템으로써 처리하였다.