Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Analysis of Energy Losses in a Natural Gas Spark Ignition Engine for Power Generation

천연가스 스파크점화 엔진 발전기에서의 에너지 손실 분석

  • 박현욱 (한국기계연구원 그린동력연구실) ;
  • 이준순 (과학기술연합대학원대학교 환경에너지기계공학) ;
  • 오승묵 (한국기계연구원 그린동력연구실) ;
  • 김창업 (한국기계연구원 그린동력연구실) ;
  • 이용규 (한국기계연구원 그린동력연구실) ;
  • 강건용 (한국기계연구원 그린동력연구실)
  • Received : 2020.08.15
  • Accepted : 2020.09.15
  • Published : 2020.12.31
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Abstract

Stoichiometric combustion in spark ignition (SI) engines has an advantage of meeting future stringent emission regulations. However, the drawback of the combustion is a lower thermal efficiency than that of lean burn. In this study, energy losses in a natural gas stoichiometric SI engine generator were analyzed to establish a strategy for improving the generating efficiency (GE). The energy losses were investigated based on dynamometer and load bank experiments. As the intake manifold pressure increased in the dynamometer experiment, the brake thermal efficiency (BTE) increased mainly due to the reduction in the pumping and mechanical losses. In the load bank experiment, the generating power and GE increased with the increased intake manifold pressure. The generating power and GE were lower than the brake power and BTE due to the cooling fan power and the losses in the generator.

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