DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Chang, Dae Jun | - |
dc.contributor.advisor | 장대준 | - |
dc.contributor.author | Park, Hyunjun | - |
dc.date.accessioned | 2019-08-28T02:44:37Z | - |
dc.date.available | 2019-08-28T02:44:37Z | - |
dc.date.issued | 2018 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=733729&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/265934 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 기계공학과, 2018.2,[vi, 33 p. :] | - |
dc.description.abstract | This study proposes an LNG fuel gas supply system, it is called the Compressor-Assisted Fuel Gas Supply System (CA-FGSS) which utilizes compressors for multi-purpose. In the CA-FGSS, the compressors are used not only to manage boil-off gas (BOG) in the LNG fuel tank but also to provide a pressure differential for drawing LNG from the tank. The operation sequence of the CA-FGSS is defined and the feasibility of the sequence is verified by dynamic process simulations. The CA-FGSS is applied to 2-stroke dual-fuel engines which require medium or high fuel gas injection pressure (16 or 300 bar). Availability analysis shows that the CA-FGSS had 99% system availability with the lesser number of redundant equipment than conventional pump-based FGSS (PB-FGSS) because CA-FGSS is free of components with high failure frequency and long maintenance time such as in-tank pumps installed in the LNG fuel tank. This result affects economic feasibility of the CA-FGSS, so the capital expenditure (CAPEX) of the CA-FGSS is 10% lower than that of the PB-FGSS. A sensitivity analysis for the entire propulsion system shows that the propulsion systems which adopt the CA-FGSS are more economical than the pump-based propulsion systems at the same pressure. On the other hand, high-pressure propulsion systems are more economical than the medium-pressure systems when the LNG fuel price is high. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | LNG▼aLNG fueled ship▼aFuel gas supply system (FGSS)▼aBoil-off gas (BOG)▼aBOG compressors▼aSystem availability▼aLife cycle cost (LCC) | - |
dc.subject | 액화천연가스▼aLNG 추친선박▼aLNG 연료공급 시스템▼aBOG 압축기▼a시스템 가용도 | - |
dc.title | Design of the compressor-assisted LNG fuel gas supply systems | - |
dc.title.alternative | 압축기를 활용한 LNG 연료공급 시스템의 설계 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :기계공학과, | - |
dc.contributor.alternativeauthor | 박현준 | - |
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