The effects of residual gas trapping on part load performance and emissions of a spark ignition direct injection engine fuelled with wet ethanol

Lanzanova, Thompson; Martins, Mario; Machado, Paulo Romeu Moreira; Pedrozo, Vinícius B.; Zhao, Hua

doi:10.1016/j.apenergy.2019.113508

Cited by 25 publications

(16 citation statements)

References 56 publications

(65 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Dessa forma, entende-se que o custo de operação pode ser um fator limitante para a introdução dessa tecnologia dual-fuel, uma vez que o etanol hidratado comercializado no Brasil, contendo aproximadamente 5% (v/v) de água (E95W5) [52], teve um preço médio de 3,00 R$/dm 3 entre Abril de 2019 e Março de 2020 [51]. Entretanto, é importante destacar que os custos de produção de E65W35 poderão ser menores que os de E95W5 devido à redução de parte da energia gasta nas fases de destilação e desidratação [33][34][35][36][37], Portanto, existem oportunidades para obtenção de preços mais competitivos para o etanol de alto teor de hidratação e, consequentemente, uma redução dos custos de operação de veículos comerciais pesados.…”

Section: Casounclassified

“…Por fim, o uso de etanol com elevados teores de água pode trazer vantagem econômica quando comparado à injeção de etanol anidro ou de mistura azeotrópica de aproximadamente 95% de etanol em água. Isso se deve ao fato de que é possível economizar energia durante o processo de produção de etanol hidratado com maiores teores de água [33][34][35][36][37] o que poderia propiciar a redução do preço final do combustível ao consumidor.…”

Section: Introductionunclassified

See 1 more Smart Citation

Miller cycle and wet ethanol injection for high efficiency and low NOx emissions on a HD diesel engine

Pedrozo¹,

Lanzanova²,

Zhao³

et al. 2021

Blucher Engineering Proceedings

Self Cite

View full text Add to dashboard Cite

Costly aftertreatment systems and advanced technologies have been introduced to heavy-duty diesel engines in order to meet stringent emissions and fuel efficiency regulations. To overcome the typical trade-off between exhaust emissions and engine running costs, this study investigated the effects of Miller cycle and wet ethanol injection on a single cylinder diesel engine with a displaced volume of 2 dm 3 . The experiments were performed at 1200 rpm and 24 bar of net indicated mean effective pressure, which corresponds to maximum load of the engine. A variable valve actuation system allowed for the exploration of Miller cycle via late intake valve closing (LIVC). The results revealed that the application of Miller cycle on a diesel-only mode decreased nitrogen oxides (NOx) emissions at the expense of higher soot emissions and lower net indicated efficiency. The combination of Miller cycle and port fuel injection of wet ethanol with 35% (v/v) of water reduced NOx emissions by up to 66% to 4,5 g/kWh while increasing the net indicated efficiency in 1,1%. The relatively lower the levels of NOx emissions also helped to minimise the estimated consumption of aqueous urea solution in the aftertreatment. Overall, the proposed combustion strategy allowed for a high efficiency, low emission, and potentially cost-effective full load engine operation, depending on fuel prices.

show abstract

Section: Casounclassified

Section: Introductionunclassified

Miller cycle and wet ethanol injection for high efficiency and low NOx emissions on a HD diesel engine

Pedrozo¹,

Lanzanova²,

Zhao³

et al. 2021

Blucher Engineering Proceedings

Self Cite

View full text Add to dashboard Cite

show abstract

“…Lanzanova et al [27] investigated the effects of residual gas trapping with a negative valve overlap (NVO) strategy, in a single cylinder spark ignition DI engine. Anhydrous ethanol was compared with hydrous ethanol in different compositions, and RON 95 gasoline.…”

Section: Introductionmentioning

confidence: 99%

Efeitos da Variação dos Eventos de Válvulas na Combustão, Desempenho e Emissões de um Motor de Ignição por Centelha operando em Carga Parcial com Etanol

Golke¹,

Rohrig²,

Prante³

et al. 2021

Blucher Engineering Proceedings

Self Cite

View full text Add to dashboard Cite

The stricter legislation on pollutant emissions and the demand for less CO2 per km has been driven the industry on a pursuit trade off in internal combustion engines (ICE). Urban area frequently stands for engine part load operation. For this reason, high engine performance on this map region is essential to mitigate greenhouse gas emission and improve urban air quality. However, spark ignition engine efficiency is worsened by load control method in part load that increase the pumping loses. Therefore, the present work investigated the effects on combustion, performance and emissions by varying the intake and exhaust valve timings. The tests were carried out in a three-cylinder 1.0 l engine with direct injection system. The engine was fueled with hydrous ethanol and the tests were performed at 4 and 8 bar IMEP, 1500 rpm and stoichiometric lambda. The valve timing setting was from a locked position of 5 CAD of NVO to 85 CAD of PVO. The spark timing was adjusted to maintain the CA50 at 10 CAD aTDCf. The injection timing and pressure were kept at 30 CAD aTDCi and 100 bar. The COVIMEP was limited at 3%. The results showed slightly increase in engine efficiency and decrease of NOX emission with higher positive valve overlap.

show abstract

“…Chauhan et al [15] and Sandalci et al [25] cite that among the methods used for ethanol use on diesel engine, fumigation is the more studied, for enabling the higher diesel substitution rate by ethanol, in energy terms (up to 50%), and for requiring fewer changes on the engine physical structure. Besides the use of commercial ethanol, with low water concentration, in recent years, studies have been carried out aiming to characterize the use of ethanol with high water concentrations (wet ethanol) on spark ignition engine [27][28][29][30] and compression ignition engines.…”

Section: Introductionmentioning

confidence: 99%

“…According to the literature previously mentioned, most studies have been carried out through experimental work on spark ignition engines [27][28][29][30] running with wet ethanol, or on a compression ignition engine using conventional hydrous ethanol (with low water concentration). Only a small part of research on this matter has studied the wet ethanol fumigation on small diesel engines operating with direct injection diesel oil and fumigated wet ethanol, especially applying air throttled as in this study.…”

Section: Introductionmentioning

confidence: 99%

Wet ethanol fumigation on a compression ignition engine: effects of air intake throttled

Rosa

Altafini

Wander

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

New techniques for the use of renewable fuels have been proposed by researchers around the world, seeking to reduce our dependence on fossil fuels and emissions of harmful gases. For compression ignition engines, fumigation stands out for allowing more significant replacements than other dual-fuel techniques, and also for not requiring modifications to the original engine structure. In this context, wet ethanol has emerged as one of the most viable fuels for port fuel injection due to its low reactivity and its renewable origin. This paper investigates the effects caused on the compression ignition engine by the use of diesel oil and wet ethanol by fumigation method and an air restriction in the engine intake through a throttle. The used engine was a small single-cylinder, coupled to an alternator, with constant load and engine speed. The fumigation fuel was wet ethanol with four different water concentrations, and different fractions of diesel oil substitution were tested. The results indicated that the use of ethanol and wet ethanol by the fumigation method increases conversion efficiency by up to 10% compared to the baseline test. However, the reduction in the intake airflow always causes a decrease in this efficiency. Intake air throttled also provided an increase in exhaust gas opacity compared to the free airflow conditions, but it is reduced when compared to the baseline test. Concerning specific emissions, carbon monoxide has higher emission levels when ethanol fumigation is used compared to the baseline condition. Under the same conditions, nitrogen oxide emissions are reduced.

show abstract

The effects of residual gas trapping on part load performance and emissions of a spark ignition direct injection engine fuelled with wet ethanol

Cited by 25 publications

References 56 publications

Miller cycle and wet ethanol injection for high efficiency and low NOx emissions on a HD diesel engine

Miller cycle and wet ethanol injection for high efficiency and low NOx emissions on a HD diesel engine

Efeitos da Variação dos Eventos de Válvulas na Combustão, Desempenho e Emissões de um Motor de Ignição por Centelha operando em Carga Parcial com Etanol

Wet ethanol fumigation on a compression ignition engine: effects of air intake throttled

Contact Info

Product

Resources

About