Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
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A Effects of Natural Gas-Diesel/Hi-sene Dual Fuel Operation on Performance of a Heavy-Duty Diesel engine for Power Generation

발전용 대형 디젤 엔진의 천연가스-디젤/부생유(Hi-sene) 혼합연소 시 엔진 성능변화에 미치는 영향

  • Cho, Jungkeun (The Graduate school, Dept. of Mechanical engineering, Yonsei University) ;
  • Park, Sangjun (The Graduate school, Dept. of Mechanical engineering, Yonsei University) ;
  • Song, Soonho (Dept. of Mechanical engineering, Yonsei University)
  • 조정근 (연세대학교 기계공학과 대학원) ;
  • 박상준 (연세대학교 기계공학과 대학원) ;
  • 송순호 (연세대학교 기계공학과)
  • Received : 2015.08.06
  • Accepted : 2015.12.17
  • Published : 2016.03.31
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Abstract

This study is a numerical study using commercial simulation program GT-Power on 1.5MW diesel engine for power generation. Performance comparison has done for diesel operation with dual fuel operation for different engine load(50%, 75%, 100%) using the target engine model with additional gas injection system. Effect of using Hi-sene, which is actually being used in island area, instead of diesel was also studied. As a result, under 60% natural gas with diesel condition, BSFC was increased by 32% without modifying system. There was almost no change for natural gas/Hi-sene condition compared with natural gas/diesel condition. Decrease of burned fuel fraction was the main reason of these phenomena. After optimizing system, BSFC was improved by 2%.

본 연구에서는 1.5MW급의 발전용 디젤 엔진을 대상으로 상용 프로그램인 GT-Power를 이용하여 천연가스와 디젤 혼합연소 엔진 모델을 구축하였으며 이를 통해 기존의 디젤 연소를 하는 경우와 천연가스-디젤 혼합연소를 하는 경우의 엔진 성능 변화를 부하율(50%, 75%, 100%)에 따라 비교하였다. 또한 도서지역에서 실제로 사용되고 있는 부생유를 적용하는 경우의 영향에 대한 연구를 진행하였다. 그 결과 엔진의 운전 조건 변화 없이 천연가스를 디젤과 60% 혼합비로 연소하는 경우 최대 32%의 BSFC 증가를 보였으며 천연가스와 부생유를 혼합연소 하는 경우에도 디젤을 혼합 연소하는 경우와 크게 다르지 않은 결과를 보였다. 이러한 BSFC 증가의 원인을 연료의 불완전 연소율 증가로 제시하고 이에 대한 최적화를 진행했으며 그 결과 60% 혼소율 조건에서 약 2%의 개선효과를 보였다.

Keywords

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