Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
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A Study on Commercialization Feasibility of HCNG Engine in Emissions Characteristics

HCNG 엔진의 배출가스 특성에 따른 상용화 타당성 연구

  • Park, Cheolwoong (Engine research team, Korea Institute of Machinery and Materials) ;
  • Kim, Changgi (Engine research team, Korea Institute of Machinery and Materials) ;
  • Choi, Young (Engine research team, Korea Institute of Machinery and Materials) ;
  • Lee, Janghee (Engine research team, Korea Institute of Machinery and Materials)
  • 박철웅 (한국기계연구원 그린동력연구실) ;
  • 김창기 (한국기계연구원 그린동력연구실) ;
  • 최영 (한국기계연구원 그린동력연구실) ;
  • 이장희 (한국기계연구원 그린동력연구실)
  • Received : 2012.04.12
  • Accepted : 2013.01.02
  • Published : 2013.02.28
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Abstract

Using natural gas-hydrogen blended fuel (HCNG) in a heavy duty vehicle is regarded as an alternative to meet reinforced emission regulation compared to a recent direct injection (DI) diesel engine. Hydrogen can lead stable lean combustion even under leaner mixture condition than natural gas, so that improving not only thermal efficiency but also $NO_x$ emissions. In the present study, the feasibility of HCNG engine's commercialization was accessed with HCNG fuel (30% $H_2$ and 70% natural gas) in aspect to the reliability and possibility to reduce $NO_x$ emissions by the level of EURO-VI under various operating conditions.

$NO_x$ 배출허용기준이 강화되는 배출가스 규제에 대응하기 위한 대안으로서 제시되는 천연가스-수소 혼합연료 (HCNG)는 수소의 빠른 화염속도와 넓은 가연범위를 이용하여 후처리 장치 없이 규제치를 만족할 수 있어 디젤엔진에 비해 저공해성이나 가격경쟁력 측면에서 유리한 장점이 있다. 열효율 측면에서도 우수성을 인정받는 HCNG 연료는 수소 혼합율은 물론 운전영역별 운전전략에 따라 연소특성이 달라진다. 본 연구에서는 대형 천연가스 엔진에 수소혼합율 30%의 HCNG 연료를 적용하여 운전영역별 안정적인 연소특성 및 배출가스 특성을 살펴봄으로써 상용화 가능성과 운전전략을 포함한 기술 개발방향에 대해 검토하고자 하였다.

Keywords

References

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