A prediction study of a spark ignition supercharged hydrogen engine

Al-Baghdadi, Maher A.R. Sadiq; Shahad, Haroun A.K.

doi:10.1016/s0196-8904(03)00127-4

Cited by 38 publications

(16 citation statements)

References 9 publications

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“…Besides the ignition timing (IT) regulation, it has been demonstrated that supercharging is an effective way to increase the power generated in engines fueled with hydrogen or with blends which contain hydrogen, because pressures over the atmospheric involve an increment in the intake air flow, which improves the volumetric efficiency and the development of combustion [50][51][52]. However, some authors have detected that in order to [53][54][55].…”

Section: Introductionmentioning

confidence: 99%

Experimental study of ignition timing and supercharging effects on a gasoline engine fueled with synthetic gases extracted from biogas

Arroyo

Moreno

Muñoz

et al. 2015

Energy Conversion and Management

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Section: Introductionmentioning

confidence: 99%

Experimental study of ignition timing and supercharging effects on a gasoline engine fueled with synthetic gases extracted from biogas

Arroyo

Moreno

Muñoz

et al. 2015

Energy Conversion and Management

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“…Supercharging has been suggested as a promising possibility to increase the power output mainly in PFI hydrogen engines [18][19][20][21][22][23][24][25]. The idea of a boosted PFI hydrogen engine has been shown since the 1980s [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…More recently, Berckmüller et al [21] applied supercharging (1.8 bar) to increase the specific power output of a single-cylinder PFI engine by 30% in comparison to naturally aspirated operation. Al-Baghdadi and Al-Janabi [22] investigated the effects of compression ratio, equivalence ratio, and inlet pressure on the performance and NO X emissions of a carburetted supercharged hydrogen engine using quasi 1D modelling. Supercharging was found to be a more effective method of increasing the output of a hydrogen engine rather than increasing its compression ratio.…”

Section: Introductionmentioning

confidence: 99%

Computational Study of Hydrogen Direct Injection for Internal Combustion Engines

Hamzehloo¹,

Aleiferis²

2013

SAE Technical Paper Series

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Hydrogen has been largely proposed as a possible fuel for internal combustion engines. The main advantage of burning hydrogen is the absence of carbon-based tailpipe emissions. Hydrogen's wide flammability also offers the advantage of very lean combustion and higher engine efficiency than conventional carbon-based fuels. In order to avoid abnormal combustion modes like pre-ignition and backfiring, as well as air displacement from hydrogen's large injected volume per cycle, direct injection of hydrogen after intake valve closure is the preferred mixture preparation method for hydrogen engines. The current work focused on computational studies of hydrogen injection and mixture formation for direct-injection spark-ignition engines. Hydrogen conditions at the injector's nozzle exit are typically sonic. Initially the characteristics of under-expanded sonic hydrogen jets were investigated in a quiescent environment using both Reynolds-Averaged NavierStokes (RANS) and Large-Eddy Simulation (LES) techniques. Various injection conditions were studied, including a reference case from the literature. Different nozzle geometries were investigated, including a straight nozzle with fixed cross section and a stepped nozzle design. LES captured details of the expansion shocks better than RANS and demonstrated several aspects of hydrogen's injection and mixing. Incylinder simulations were also performed with a side 6-hole injector using 70 and 100 bar injection pressure. Injection timing was set to just after inlet valve closure with duration of 6 μs and 8 μs, leading to global air-to-fuel equivalence ratios  typically in the region of 0.2-0.4. The engine intake air pressure was set to 1.5 bar absolute to mimic boosted operation. It was observed that hydrogen jet wall impingement was always prominent. Comparison with non-fuelled engine conditions demonstrated the degree of momentum exchange between in-cylinder hydrogen injection and air motion. LES highlighted details of hydrogen's spatial distribution throughout the injection duration and up to ignition timing. Higher peak velocities were predicted by LES, especially on the tumble plane. With the employed injection strategy, the areas closer to the cylinder wall were richer in fuel than the centre of the chamber close to the end of compression.

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“…Some previous studies [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] have then tested the effect of natural gas -hydrogen mixtures in spark ignition engines (see Table 1). Their measured performances have showed that electric power output is improved by engines fuelled with mixtures of natural gas/H 2 compared to natural gas only fuelled engines.…”

Section: Introductionmentioning

confidence: 99%

“…Al-Baghadi and Al-Janabi [11,12] Raman et al [13] Swain et al [14] Cattelan and Wallace [15] Collier et al [6] Hoeskstra et al [7] Vandenborre and Sierens [16], Verhelst and Sierens [17,18] Munshi et al [19] Collier et al [20] 523 …”

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confidence: 99%

Effect of H2 produced through steam methane reforming on CHP plant efficiency

Corre

Rahmouni

Saikaly

et al. 2011

International Journal of Hydrogen Energy

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In-situ hydrogen production is carried out by a catalytic reformer kit set up into exhaust gases for a CHP plant based on spark ignition engine running under lean conditions. An overall auto-thermal reforming process is achieved.Hydrogen production is mainly dependent on O 2 content in exhaust gases. Experiments are conducted at constant speed at 2 air/fuel ratios and 4 additional natural gas flow rates. H 2 content varies in the range 6% to 10% in vol. H 2 content effect is analyzed with respect to performance and emissions. Comparing with EGR shows an increasing of electrical efficiency of 1% whilst heat recovery decreases by 1%. NO and HC decrease by 18% and 12%, but CO increases by 14%, respectively. The results show that: (i) graphite joints were destroyed under effect of H 2 and high temperature; (ii) a cold spot appeared in the RGR line, and condensation has as consequence a carbon deposit; and (iii) no back-fire or knock occurred.

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A prediction study of a spark ignition supercharged hydrogen engine

Cited by 38 publications

References 9 publications

Experimental study of ignition timing and supercharging effects on a gasoline engine fueled with synthetic gases extracted from biogas

Experimental study of ignition timing and supercharging effects on a gasoline engine fueled with synthetic gases extracted from biogas

Computational Study of Hydrogen Direct Injection for Internal Combustion Engines

Effect of H2 produced through steam methane reforming on CHP plant efficiency

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