Proceedings of the Korean Society of Marine Engineers Conference (한국마린엔지니어링학회:학술대회논문집)
- 2005.06a
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- Pages.1069-1076
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- 2005
A study on derating of diesel main engine
디젤 주기관의 DERATING에 관한 연구
-
Cho, Kwon-Hae
;
- Park, Go-Ryong ;
- Lee, Dong-Hun ;
- Kim, In-Suk ;
- Lee, Sung-Gwan ;
- Jang, Tae-Lin ;
- Moon, Byung-Jin ;
- Son, Min-Su
-
조권회
(한국해양대학교 해사대학 기관시스템공학부)
;
- 박고룡 (한국해양대학교 대학원) ;
- 이동훈 (한국해양대학교 대학원) ;
- 김인숙 (한국해양대학교 대학원) ;
- 이성관 (한국해양대학교 대학원) ;
- 장태린 (한국해양대학교 대학원) ;
- 문병진 (한국해양대학교 대학원) ;
- 손민수 (한국해양대학교 대학원)
- Published : 2005.06.26
Abstract
The oil crises in 1973 and 1979 caused considerable effort to decrease the fuel consumption. As a result, the main engine had been changed through the shape(from loop scavenging air system to uniflow scavenging air system), higher compression ratio, low speed and long stroke. It is difficult to make a various engine satisfied with all owner's request. So manufacturer could find a way that can change the rating through large range from the engine already manufactured. These ways are tried through large range to change rpm to 72% and engine's output to 48% of MCR with keeping the normal engine's shape almost. The important element considered in the process of derated output of the main engine is to recover the beginning overcapitalization as soon as possible through low SFOC. In this paper, it is compared and considered between rating and derating engine with several data about modifying rating which have been done by engine manufacturer so far. And the selection process of derating engine is studied also.