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마이크로 열병합발전용 10kW급 천연가스엔진의 성능 최적화
이창준(Changjun Lee),류정인(Jeongin Ryu),오시덕(Sideok Oh),표영덕(Youngdug Pyo),이영재(Youngjae Lee) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Cogeneration is an energy conversion process, where electricity and useful heat are produced simultaneously in one process. Also, carbon dioxide emissions can be reduced as well. The cogeneration process may be based on the use of steam, gas turbines or combustion engines. However, there have been few models with an output of less than 100 kilowatt. In the present study, a spark ignited gas engine with generation output of 10 kilowatts was developed for micro cogeneration package. The gas engine shows 29.2% of thermal efficiency under Stoichiometric combustion and 33.6% of thermal efficiency under lean combustion. NOx emission shows less than 10ppm at 13% oxygen under stoichiometric combustion and about<br/> 100ppm at 13% oxygen under lean combustion.
이창준 ( Lee Changjun ),박태일 ( Park Taeil ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.1
The need for maintenance of bridge infrastructure is increasing due to aging, and the cost of maintaining the infrastructure must be calculated for effective budget distribution. Therefore, in this study, representative defects according to bridge superstructure type are derived to calculate the cost for each repair method. First of all, the representative bridges, PSCI girder bridge, Rahmen bridge, Steel box girder bridge, and RC slab bridge, were selected as superstructures using BMS data, and repair methods for defects were presented. In addition, the cost of the repair method by superstructure type was compared. This result is expected to predict total maintenance costs in consideration of the maintenance cycle.
레이블 스위칭 네트워크에서 독립적인 경로상의 양방향 연결 제어 메커니즘
이창준 ( Changjun Lee ),권태현 ( Taehyun Kwon ),차영욱 ( Youngwook Cha ),김춘희 ( Choonhee Kim ) 한국정보처리학회 2006 한국정보처리학회 학술대회논문집 Vol.13 No.2
MPLS/GMPLS와 같은 레이블 스위칭 네트워크에서 양방향 통신을 위한 양방향 연결 설정은 CR-LDP 또는 RSVP-TE 신호 프로토콜을 이용하여 동일한 경로 상의 양방향 연결설정만 가능하다. 본 논문에서는 레이블 스위칭 네트워크에서 독립적인 경로 상의 양방향 통신을 위한 연결 설정 및 해제를 위한 연결 제어 메커니즘을 제안한다.