Experimental analysis of ethanol dual-fuel combustion in a heavy-duty diesel engine: An optimisation at low load

Pedrozo, Vinícius B.; May, Ian; Nora, Macklini Dalla; Cairns, Alasdair; Zhao, Hua

doi:10.1016/j.apenergy.2015.12.052

Cited by 88 publications

(32 citation statements)

References 57 publications

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“…Engine cylinder pressure and temperature simulations were performed in the diesel mode primarily, and then gaseous fuel (CH 4 ) was added to the reactions for simulation of the dual-fuel mode. The apparent net HRR, denoted by (dQ n /dt), was calculated using Equation (4) (Pedrozo, May, Dalla Nora, Cairns, & Zhao, 2016):…”

Section: Engine Performance Simulationmentioning

confidence: 99%

Experimental and computational fluid dynamics-based numerical simulation of using natural gas in a dual-fueled diesel engine

Akbarian

Najafi

Jafari³

et al. 2018

Engineering Applications of Computational Fluid Mechanics

118

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In this paper, investigations were performed on a dual-fueled constant-speed engine. Initially, the emissions and performance of a diesel engine were investigated, and after moving to the dual-fuel engine, experimental tests were carried out under different loads (10, 25, 50, 75, and 100% of the full load) and pilot to gaseous fuel (PGF) ratios (30, 40, and 50%). The results showed that under different loads and PGF ratios, the emissions of nitrous oxides and particle materials in the dual mode were lower than those for the diesel engine, and that the difference was significant. The emission of carbon dioxide in the dual-fueled mode varied little compared to that of the diesel mode, although it was lower than that for the diesel engine. In loads lower than 75% of the full load, the emission of carbon monoxide in the diesel engine was lower than that for the dual-fueled engine. However, in full load, this result was reversed and had significant difference. The dual mode had lower hydrocarbon emission compared to that of the diesel mode in all PGF ratios and loads. A computational fluid dynamics-based numerical simulation was performed by KIVA3V, and its results showed good agreements with the experimental results under cylinder pressure. ARTICLE HISTORY

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Section: Engine Performance Simulationmentioning

confidence: 99%

Experimental and computational fluid dynamics-based numerical simulation of using natural gas in a dual-fueled diesel engine

Akbarian

Najafi

Jafari³

et al. 2018

Engineering Applications of Computational Fluid Mechanics

118

View full text Add to dashboard Cite

show abstract

“…Therefore, research on the reduction of harmful emissions into the atmosphere as well as CIE standardisation has become prevalent during recent decades (for example, EN590, EPA, 2012). One of the most widespread technologies is the conversion of CIE for dual-fuel operation and the use of petroleum-derived fuel or either compressed natural gas (CNG) or liquefied natural gas [6][7][8][9][10][11]. The introduction of NG into the cylinder can be achieved with either high-pressure injection or in combination with liquid fuel spray or carburation with air into air inlet manifold.…”

Section: Introductionmentioning

confidence: 99%

Research on Fuel Efficiency and Emissions of Converted Diesel Engine with Conventional Fuel Injection System for Operation on Natural Gas

et al. 2019

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This paper presents a study on the energy efficiency and emissions of a converted high-revolution bore 79.5 mm/stroke 95 mm engine with a conventional fuel injection system for operation with dual fuel feed: diesel (D) and natural gas (NG). The part of NG energy increase in the dual fuel is related to a significant deterioration in energy efficiency (ηi), particularly when engine operation is in low load modes and was determined to be below 40% of maximum continuous rating. The effectiveness of the D injection timing optimisation was established in high engine load modes within the range of a co-combustion ratio of NG ≤ 0.4: with an increase in ηi, compared to D, the emissions of NOx+ HC decreased by 15% to 25%, while those of CO2 decreased by 8% to 16%; the six-fold CO emission increase, up to 6 g/kWh, was unregulated. By referencing the indicated process characteristics of the established NG phase elongation in the expansion stroke, the combustion time increase as well as the associated decrease in the cylinder excess air ratio (α) are possible reasons for the increase in the incomplete combustion product emission.

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“…A fim de apresentar uma solução factível à atual necessidade da indústria em produzir motores com alta eficiência e baixos níveis de emissão de Gases do Efeito Estufa, várias pesquisas têm sido realizadas para identificar as melhores modificações construtivas aplicáveis a motores com ignição por compressão que tenham o etanol como combustível. Além da adoção de estratégias de modificação dos combustíveis, o amplo conhecimento sobre o processo de formação da mistura também é necessário [5,16]. De acordo com a literatura, algumas das técnicas adotadas para promover o uso de etanol em motores diesel são: mistura de combustíveis; injeção de álcool no coletor de admissão; injeção direta de etanol e óleo diesel na câmara de combustão; instalação de sistema de ignição por centelha e o método da superfície aquecida [17][18][19].…”

Section: Introductionunclassified

Efeito da temperatura do ar de admissão no atraso de ignição de um motor a etanol de ignição assistida por superfície aquecida

Todaro¹,

Zabeu²,

Romio³

et al. 2019

Blucher Engineering Proceedings

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Experimental analysis of ethanol dual-fuel combustion in a heavy-duty diesel engine: An optimisation at low load

Cited by 88 publications

References 57 publications

Experimental and computational fluid dynamics-based numerical simulation of using natural gas in a dual-fueled diesel engine

Experimental and computational fluid dynamics-based numerical simulation of using natural gas in a dual-fueled diesel engine

Research on Fuel Efficiency and Emissions of Converted Diesel Engine with Conventional Fuel Injection System for Operation on Natural Gas

Efeito da temperatura do ar de admissão no atraso de ignição de um motor a etanol de ignição assistida por superfície aquecida

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