Performance Analysis of HCNG Fuel on Sequential Gas Injection Based Heavy Duty Engine

Singh, Satbir; Mathai, Reji; Sehgal, Ajay Kumar; Suresh, R.; Das, Baisakhi; Tyagi, Nishant; Mohite, J. P.; Chougule, N. B.

doi:10.4271/2015-01-0005

Cited by 3 publications

(1 citation statement)

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“…17,18 Hydrogen (H 2 ) has a fast combustion rate and its laminar flame propagation speed is much higher than that of methane (about 2.70 m/s for hydrogen and 0.38 m/s for CH 4 ), therefore blending hydrogen combustion can effectively increase the in-cylinder combustion rate of natural gas engines and improve the engine stability, while reducing the unburned total hydrocarbon (THC) emissions. 19,20 For natural gas engines under stoichiometric conditions, hydrogen doping (H 2 ) causes higher in-cylinder combustion temperatures and more NO x formation. The higher in-cylinder temperature will lead to an increase in exhaust energy losses and a decrease in engine thermal efficiency 21,22 On the other hand, hydrogen doping can effectively extend the lean limit of natural gas engines, 23 which means by enhancing the in-cylinder excess air ratio of a hydrogen doping engine, the engine thermal efficiency can be promoted, 24 meanwhile, the NO x formation and emission can be reduced.…”

Section: Introductionmentioning

confidence: 99%

Effects of excess air ratio and spark timing on performance and gaseous pollutant emissions of fuel reforming natural gas engine

Zheng

Zhou

Zheng

et al. 2022

International Journal of Engine Research

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The combustion and emission characteristics as well as the economic performance of partial oxidation fuel reforming (POFR) natural gas engines were investigated by adjusting the fuel reforming ratios and the engine load. The performance of the POFR engine with a 12% fuel reforming ratio was compared with that of the original engine. The results showed that the fuel-partial-reforming was effective in reducing the cycle-to-cycle variations over the whole range of the operating conditions. The THC and NOX emissions decreased at almost all operating conditions, but showed different decreasing trends at different loads and equivalence ratios, while the CO emissions increased at all operating conditions. It was found that reducing the advancement of ignition timing of the POFR-engine can further reduce the gaseous pollutant emissions without reducing the economic performance of the engine. In conclusion, blending reforming gas improved the overall performance of the natural gas engine at low to medium load conditions.

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