Abstract
An experimental study on the performance and emissions of a spark ignition engine with natural gas-hydrogen blends combined with EGR was conducted. The results show that the engine power output decreased with the increase of exhaust gas recirculation ratio (φ), and hydrogen enrichment at a considerable φ could improve the engine power output. Brake specific fuel consumption decreased first and then increased with the increase of φ, and its value was minimum when φ=5%. Brake specific fuel consumption decreased with the increase of hydrogen fraction. For a specified hydrogen fraction, NOx concentration decreased with the increase of φ, which was more obvious at high hydrogen fractions. HC and CO emissions increased with the increase of φ and decreased with the increase of hydrogen fraction. The higher performance and the lower emissions of the engine could be obtained when ψ(H2)=20% and φ=10%.
| Original language | English |
|---|---|
| Pages (from-to) | 18-21+35 |
| Journal | Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University |
| Volume | 43 |
| Issue number | 5 |
| State | Published - May 2009 |
Keywords
- Emissions
- Exhaust gas recirculation
- Hydrogen
- Natural gas