Performance and emission characteristics of a turbocharged spark-ignition hydrogen-enriched compressed natural gas engine under wide open throttle operating conditions

• Published in: International journal of hydrogen energy Vol. 35; no. 22; pp. 12502 - 12509
• Main Authors: Ma, Fanhua, Wang, Mingyue, Jiang, Long, Deng, Jiao, Chen, Renzhe, Naeve, Nashay, Zhao, Shuli
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.11.2010; Elsevier
• Subjects: Alternative fuels. Production and utilization; Applied sciences; Combustion; Compressed; Cylinders; Emission; Emission analysis; Emissions control; Energy; Engines; Exact sciences and technology; Fuels; Hydrogen; Natural gas; Throttles; Turbochargers; Wide open throttle; Emission; Wide open throttle; Combustion; Nitrogen oxide; Spark ignition; Compressed gas; Hydrogen; Spark ignition engine; Flame propagation; Operating conditions; Gas engine; Thermal efficiency; Performance; Natural gas
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2010.08.053

This paper investigates the effect of various hydrogen ratios in HCNG (hydrogen-enriched compressed natural gas) fuels on performance and emission characteristics at wide open throttle operating conditions using a turbocharged spark-ignition natural gas engine. The experimental data was taken at hydrogen fractions of 0%, 30% and 55% by volume and was conducted under different excess air ratio ( λ) at MBT operating conditions. It is found that under various λ, the addition of hydrogen can significantly reduce CO, CH 4 emissions and the NO x emission remain at an acceptable level when ignition timing is optimized. Using the same excess air ratio, as more hydrogen is added the power, exhaust temperatures and max cylinder pressure decrease slowly until the mixture’s lower heating value remains unchanged with the hydrogen enrichment, then they rise gradually. In addition, the early flame development period and the flame propagation duration are both shorter, and the indicated thermal efficiency and maximum heat release rate both increase with more hydrogen addition.