Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Improvement of Thermal Efficiency using Atkinson Cycle in a High-Compression Ratio, Spark-Ignition, Natural Gas Engine for Power Generation

고압축비 전기점화 천연가스 발전용 엔진에서 앳킨슨 사이클 적용을 통한 열효율 향상

  • 이준순 (한국기계연구원 모빌리티동력연구실) ;
  • 박현욱 (한국기계연구원 모빌리티동력연구실) ;
  • 오승묵 (한국기계연구원 모빌리티동력연구실) ;
  • 김창업 (한국기계연구원 모빌리티동력연구실) ;
  • 이용규 (한국기계연구원 모빌리티동력연구실) ;
  • 강건용 (한국기계연구원 모빌리티동력연구실)
  • Received : 2022.11.22
  • Accepted : 2023.01.26
  • Published : 2023.06.30
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Abstract

Natural gas is a high-octane fuel that is effective in controlling knocking combustion. In addition, as a low-carbon fuel with a high hydrogen-carbon ratio, it emits less carbon dioxide and almost no particulate matter compared to conventional fossil fuels. Stoichiometric combustion engines equipped with a three-way catalyst are useful in various fields such as transportation and power generation because of their excellent exhaust emission reduction performance. However, stoichiometric combustion engines have a disadvantage of lower thermal efficiency compared to lean combustion engines. In this study, a combination of high compression ratio and Atkinson cycle was implemented in a 11 liter, 6-cylinder, spark-ignition engine to improve the thermal efficiency of the stoichiometric engine. As a result, pumping and friction losses were reduced and the operating range was extended with optimized Atkinson camshaft. Based on the exhaust gas limit temperature of 730℃, the maximum load and thermal efficiency were improved to BMEP 0.66 MPa and BTE 35.7% respectively.

Keywords

Acknowledgement

본 연구는 산업통상자원부의 제원으로 에너지수요관리 핵심기술개발 사업 "다중 분산발전 기반의 옥상온실형 스마트 그린빌딩 융복합 시스템 개발 및 실증" 과제(20212020800050)의 지원에 의해 수행되었으며 이에 감사드립니다.

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