Literature Review and Simulation of Dual Fuel Diesel-CNG Engines

Shah, Ashish; Thipse, S. S.; Tyagi, Avdhesh; Rairikar, S. D.; Kavthekar, K.P.; Marathe, N. V.; Mandloi, Padmesh

doi:10.4271/2011-26-0001

Cited by 53 publications

(26 citation statements)

References 6 publications

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“…The initial combustion rate is determined by the amount of fuel in the spray region that is prepared for combustion. It was found [15] that the addition of CNG prolongs the ignition delay time of diesel fuel. This is partially a result of lower in-cylinder temperature and pressure at the end of compression stroke and predominantly it is a result of the chemical influence of CNG on the auto ignition process of the diesel/CNG/air mixture [16].…”

Section: Combustion Process In Conventional Dual Fuel Enginementioning

confidence: 99%

The Effect of Operating Parameters on Dual Fuel Engine Performance and Emissions – An Overview

et al. 2017

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SummaryIn order to decrease harmful exhaust gas emissions from internal combustion engines, researchers are continuously looking for alternative fuels and combustion techniques, and in this context the use of natural gas as a supplement for conventional fuels has been suggested. Since natural gas has high autoignition temperature, it cannot be used in compression ignition engines as the in-cylinder temperature around the top dead center is simply not high enough to ignite it. Therefore, in such an application natural gas has to be used with high reactivity fuel, usually diesel fuel. In these applications diesel fuel is used solely as a high energy ignition device, while natural gas is used as primary fuel. This type of combustion process is called dual fuel combustion process. This paper presents the effect of operating parameters, such as diesel fuel injection pressure, injection timing, diesel fuel mass, diesel fuel substitution ratio and intake charge conditioning, as well as engine load and speed on efficiency and harmful exhaust gas emissions from dual fuel diesel/natural gas internal combustion engines.

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Section: Combustion Process In Conventional Dual Fuel Enginementioning

confidence: 99%

The Effect of Operating Parameters on Dual Fuel Engine Performance and Emissions – An Overview

et al. 2017

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“…Because of these trends we are facing an increasing number of dual fuel approaches, especially for stationary, marine, locomotive but also truck applications. There are two basic design concepts for dual fuel engines, following a recent technology review presented by Shah et al [1]. Both concepts are based on a typical compression ignited direct injection Diesel engine where gas is additionally injected either directly into the Diesel spray in the cylinder at higher pressure or at low pressure into the intake port featuring a premixed homogeneous air gas mixture.…”

Section: Introductionmentioning

confidence: 99%

“…This leads to even more complex combustion patterns as larger amounts of Diesel fuel are injected over a longer period of time causing a coexistence of inhomogeneous and homogeneous types of combustion. Unlike in port injected dual fuel engines, in dual fuel engines featuring direct injection of both fuels in the vicinity of the TDC, the inhomogeneous type of combustion prevails for both fuels (Shah et al [1]). However, this type of dual fuel combustion still differs from the pure Diesel-like inhomogeneous combustion due to distinct mixture preparation characteristics and different chemical kinetic mechanisms inherent to dual fuel combustion.…”

Section: Introductionmentioning

confidence: 99%

Hil Compatible Engine Models for Dual Fuel Applications

Krammer¹,

Katrašnik

2015

Anais Do XXIII Simpósio Internacional De Engenharia Automotiva

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More and more, alternative fuels, fuel mixtures and dual-fuel engines are gaining in importance. This means a huge challenge to thermodynamic modeling of combustion and species transport. The computational performance is reached by an optimized filling and emptying approach applying tailored models for in-cylinder combustion and species transport in the gas path. The impact of the thermodynamic characteristics induced by the different fuels is described by an appropriate set of transport equations in combination with specifically prepared property databases. The accuracy of a lumped fuel approach is compared for a six, three and one species transport. The simulations are performed with a 6 cylinder medium speed engine. The real-time factor of this engine is in the range of 0.2 for all species transport approaches, what enables this method to support HiL based function development and calibration.

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“…6,7 Diesel-piloted natural gas (NG) engines have been proposed as a promising method to simultaneously reduce the emissions of particulate matter (PM) and nitrogen oxides (NO x ) in engines with high compression ratios. 2,8,9 Additionally, in a diesel-piloted NG dual-fuel engine, premixed NG is injected into the cylinder and piloted by a small quantity of diesel injected into the cylinder directly before the top dead center (TDC) of the compression stroke.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5] To meet these requirements, the dual-fuel combustion concept was applied in high compression ratio internal combustion engines while maintaining the same thermal efficiency as the conventional diesel engine. 6,7 Diesel-piloted natural gas (NG) engines have been proposed as a promising method to simultaneously reduce the emissions of particulate matter (PM) and nitrogen oxides (NO x ) in engines with high compression ratios.…”

Section: Introductionmentioning

confidence: 99%

Effects of the substitution rate of natural gas on the combustion and emission characteristics in a dual-fuel engine under full load

Lyu

Zhang

Bao

et al. 2017

Advances in Mechanical Engineering

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Diesel-piloted natural gas has been considered one of the most promising methods of using natural gas in a compression-ignition engine with few modifications, as this approach benefits from a high thermal efficiency resulting from a high compression ratio. This study experimentally investigated the impact of the natural gas substitution rate on the characteristics of combustion and emissions. Tests were performed under full-load operating conditions at a fixed speed of 1200 r/min with optimized injection timing, and the substitution rate of natural gas was varied with the fixed total fuel energy for different analyses. The in-cylinder pressure, pressure rise rate, heat release rate, cyclic variation of the maximum cylinder pressure (P max ) and emissions of HC, CO, NO x , and smoke were analyzed. The results indicate that P max and the maximum pressure rise rate initially increase and then decrease as the substitution rate of natural gas increases, whereas the heat release rate and standard deviation of P max increase. Moreover, HC and CO increase as the substitution rate of natural gas increases, whereas NO x and smoke emissions exhibit a trade-off trend.

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Literature Review and Simulation of Dual Fuel Diesel-CNG Engines

Cited by 53 publications

References 6 publications

The Effect of Operating Parameters on Dual Fuel Engine Performance and Emissions – An Overview

The Effect of Operating Parameters on Dual Fuel Engine Performance and Emissions – An Overview

Hil Compatible Engine Models for Dual Fuel Applications

Effects of the substitution rate of natural gas on the combustion and emission characteristics in a dual-fuel engine under full load

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