Improvements in Thermal Efficiency and Methane Slip in Natural Gas Dual-Fuel Engines with Ozone Addition
オゾン添加による天然ガスデュアルフューエル機関の高熱効率化およびメタンスリップ抑制
- Delivery
- Available on this site
- Format
- Price
- Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880
- Publication code
- 20214852
- Paper/Info type
- Symposium Text
- Pages
- 1-6(Total 6 p)
- Date of publication
- Dec 2021
- Publisher
- JSAE & JSME
- Language
- Japanese
Detailed Information
| Author(J) | 1) 稲垣 龍弥, 2) 小橋 好充, 3) 柴田 元, 4) 小川 英之 |
|---|---|
| Author(E) | 1) Ryuya Inagaki, 2) Kobashi Yoshimitsu, 3) Gen Shibata, 4) Ogawa Hideyuki |
| Affiliation(J) | 1) 北海道大学大学院工学院, 2) 北海道大学大学院工学研究院, 3) 北海道大学大学院工学研究院, 4) 北海道大学大学院工学研究院 |
| Affiliation(E) | 1) Hokkaido University Graduate School, 2) Hokkaido University Faculty of Engineering, 3) Hokkaido University Faculty of Engineering, 4) Hokkaido University Faculty of Engineering |
| Abstract(J) | 天然ガスを主燃料とし，少量の軽油を着火源とするデュアルフューエル燃焼方式では，熱効率向上を目的とした希薄燃焼化が試みられている．その一方で，希薄運転条件ではメタンスリップの低減が課題であることから，本研究では，吸気にオゾンを添加し，天然ガスの着火性を向上させることでその改善を試みた．あわせて，オゾン濃度と軽油噴射時期をパラメータに燃焼位相を適正化することで，熱効率の向上も図った． Translation |
| Abstract(E) | Natural gas dual-fuel engines are advantageous to CO2 emission reduction, but methane slip occurs due to incomplete combustion of the lean mixture. In this study, ozone was introduced into the intake gas to promote the ignition and combustion of the natural gas mixture. The effects of the ozone concentration and the injection timing of the diesel fuel on the thermal efficiency and the exhaust emissions were investigated over a wide range of the engine loads. The results showed that the ozone addition with the early injection timing achieved the best thermal efficiency and the lowest THC and NOx emissions. It was also clear that the ozone addition improved the thermal efficiency and achieved lower emissions at lower loads, and it was limited by knocking at higher loads. |
