30권 4호 335-342 2022 [한국자동차공학회 논문집 ]
| 제목 | 고압축비 전기점화 엔진에서 저발열량 합성가스 연료의 연소 및 배기 특성 |
|---|---|
| 분야 | 엔진 및 연소 |
| 언어 | Korean |
| 저자 | 이준순(과학기술연합대학원대학교), 박현욱(과학기술연합대학원대학교), 잠스랑 나랑후(과학기술연합대학원대학교), 오승묵(과학기술연합대학원대학교 한국기계연구원), 김창업(한국기계연구원), 이용규(과학기술연합대학원대학교, 한국기계연구원), 강건용(한국기계연구원) |
| Key Words | High compression ratio(고압축비), Single cylinder spark ignition engine(단기통전기점화 엔진), Syngas(합성가스), Hydrogen(수소), Low calorific fuel(저발열량 연료) |
| 초록 |
Syngas with a high-octane number can be used as fuel for spark ignition engines with a high compression ratio to improve thermal efficiency. Furthermore, the use of syngas is advantageous in terms of lean combustion due to its low ignition energy, and improvement in thermal efficiency can be expected. The simulated syngas was composed of hydrogen(H2), carbon monoxide(CO), and carbon dioxide(CO2). In this study, the characteristics of combustion and exhaust emissions based on the composition of syngas and load conditions were investigated. The in-line, six-cylinder compression ignition engine, with a compression ratio of 17.1, was modified to become a single-cylinder spark ignition engine. The coefficient of the variation of indicated mean effective pressure(COVIMEP) was limited within 5 % at 1800 rpm for full and part load conditions. The maximum load was obtained under a stoichiometric air-fuel ratio(AFR) condition, while high efficiency could be achieved at the lean operating condition. The maximum load increased with a higher H2 and CO composition of syngas. Moreover, the lean operating condition was expanded, and the highest efficiency operating condition was moved to a relatively leaner operating region. In the case of 15 % H2, 15 % CO, and 70 % CO2, stable engine operation was ensured under full and part load conditions with low calorific value syngas. However, the lean operation region was reduced, and there was a deterioration in the engine’s gross indicated thermal efficiency(ITEg). |
| 원문(PDF) | 다운로드 Journal Site |