Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
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A Study on the Emission and Particulate Matter of a Heavy Duty Natural Gas Engine According to Gas Composition under certification tests

인증시험 조건에서 가스조성 변화에 따른 대형 천연가스 엔진 배기가스 및 입자상 물질 배출 특성에 관한 연구

  • Choi, Ji-Seon (Dept. of Engine Research, Korea Institute of Machinery and Materials) ;
  • Park, Cheol-Woong (Dept. of Engine Research, Korea Institute of Machinery and Materials) ;
  • Jang, Hyoung-Jun (Dept. of Engine Research, Korea Institute of Machinery and Materials) ;
  • Kim, Chang-Gi (Dept. of Engine Research, Korea Institute of Machinery and Materials)
  • 최지선 (한국기계연구원 그린동력연구실) ;
  • 박철웅 (한국기계연구원 그린동력연구실) ;
  • 장형준 (한국기계연구원 그린동력연구실) ;
  • 김창기 (한국기계연구원 그린동력연구실)
  • Received : 2021.09.07
  • Accepted : 2021.11.30
  • Published : 2021.12.31
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Abstract

In this study, The full load test and WHTC mode test were performed to examine the effect on a heavy duty natural gas engine according to the type of standard gas for certification to check engine performance and exhaust characteristics. Two types of standard gas (Gr, G23) and commercially available natural gas were applied as the fuel used. As a result of the test results of three natural gases with different fuel compositions, G23 with a high nitrogen content was inferior in torque, fuel consumption, and thermal efficiency conditions. In addition, when evaluated in the WHTC mode it was possible to obtain a result that satisfies the EURO VI regulation. However, compared to the other two fuels, the emission characteristics of G23 decreased CO2 and CO, but increased CH4, NOx and PN emissions.

본 연구에서 인증을 위한 표준가스 종류의 변화가 대형 천연가스 엔진에 미치는 영향을 살펴보기 위해 전부하 시험과 WHTC 모드 시험 조건에서 엔진 성능 및 배기 특성을 비교하고 그 결과를 분석하였다. 실험에 사용된 연료는 표준 가스 두 종류(Gr, G23)와 시중에 유통되고 있는 천연가스, 총 3종류를 적용하였다. 연료 조성이 다른 3가지 천연가스의 실험결과 엔진 성능 특성은 질소 함유율이 높은 G23 연료에 대해서 토크, 연료소모율, 열효율 결과가 모두 다른 연료에 비해 악화되는 결과를 보였다. 또한 인증시험모드인 WHTC 모드에서 평가하였을 때, G23 연료를 적용한 경우 다른 두 연료에 비해 이산화탄소 및 일산화탄소 배출량은 감소하고 메탄, 질소산화물 및 입자상물질의 개수 배출량은 증가하여 질소산화물의 경우 EURO VI 규제치를 만족할 수 없었다.

Keywords

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