Duel Fuel Diesel Engine An Experimental Study
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Duel Fuel Diesel Engine An Experimental Study
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Author : Ramesh D. K.
language : en
Publisher: LAP Lambert Academic Publishing
Release Date : 2019-09-27
Duel Fuel Diesel Engine An Experimental Study written by Ramesh D. K. and has been published by LAP Lambert Academic Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-09-27 with categories.
This study is an attempt at achieving diesel fuel equivalent performance from diesel engines with maximum substitution of diesel with renewable fuels. In this context the study has been designed to analyze the influence of B20 algae biodiesel as a pilot fuel in a biodiesel- biogas dual fuel engine, and results are compared to those of biodiesel and diesel operation at identical engine settings.Experiments were performed at various loads from 0 to 100 % of maximum load at a constant speed of 1500 rpm. In general, B20algae biodiesel is compatible with diesel in terms of performance and combustion characteristics. Dual fuel mode operation displayslower thermal efficiency and higher fuel consumption than for other fuel modes of the test run across the range of engine loads.Dual fuel mode displayed lower emissions of NOx and Smoke opacity while HC and CO concentrations were considerably higher as compared to other fuels. In dual fuel mode peak pressure and heat release rate were slightly higher compared to diesel and biodieselmode of operation for all engine loads.
An Experimental Study Of Ethanol Diesel Dual Fuel Combustion For High Efficiency And Clean Heavy Duty Engines
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Author : Vinícius Bernardes Pedrozo
language : en
Publisher:
Release Date : 2017
An Experimental Study Of Ethanol Diesel Dual Fuel Combustion For High Efficiency And Clean Heavy Duty Engines written by Vinícius Bernardes Pedrozo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
Experimental And Computational Investigation Of Dual Fuel Diesel Natural Gas Rcci Combustion In A Heavy Duty Diesel Engine
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Author :
language : en
Publisher:
Release Date : 2018
Experimental And Computational Investigation Of Dual Fuel Diesel Natural Gas Rcci Combustion In A Heavy Duty Diesel Engine written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Abstract : Among the various alternative fuels, natural gas is considered as a leading candidate for heavy-duty applications due to its availability and applicability in conventional internal combustion diesel engines. Compared to their diesel counterparts natural gas fueled spark-ignited engines have a lower power density, reduced low-end torque capability, limited altitude performance, and ammonia emissions downstream of the three-way catalyst. The dual fuel diesel/natural gas engine does not suffer with the performance limitations of the spark-ignited concept due to the flexibility of switching between different fueling modes. Considerable research has already been conducted to understand the combustion behavior of dual fuel diesel/natural gas engines. As reported by most researchers, the major difficulty with dual fuel operation is the challenge of providing high levels of natural gas substitution, especially at low and medium loads. In this study extensive experimental and simulation studies were conducted to understand the combustion behavior of a heavy-duty diesel engine when operated with compressed natural gas (CNG) in a dual fuel regime. In one of the experimental studies, conducted on a 13 liter heavy-duty six cylinder diesel engine with a compression ratio of 16.7:1, it was found that at part loads high levels of CNG substitution could be achieved along with very low NOx and PM emissions by applying reactivity controlled compression ignition (RCCI) combustion. When compared to the diesel-only baseline, a 75% reduction in both NOx and PM emissions was observed at a 5 bar BMEP load point along with comparable fuel consumption values. Further experimental studies conducted on the 13 liter heavy-duty six cylinder diesel engine have shown that RCCI combustion targeting low NOx emissions becomes progressively difficult to control as the load is increased at a given speed or the speed is reduced at a given load. To overcome these challenges a number of simulation studies were conducted to quantify the in-cylinder conditions that are needed at high loads and low to medium engine speeds to effectively control low NOx RCCI combustion. A number of design parameters were analyzed in this study including exhaust gas recirculation (EGR) rate, CNG substitution, injection strategy, fuel injection pressure, fuel spray angle and compression ratio. The study revealed that lowering the compression ratio was very effective in controlling low NOx RCCI combustion. By lowering the base compression ratio by 4 points, to 12.7:1, a low NOx RCCI combustion was achieved at both 12 bar and 20 bar BMEP load points. The NOx emissions were reduced by 75% at 12 bar BMEP while fuel consumption was improved by 5.5%. For the 20 BMEP case, a 2% improvement in fuel consumption was achieved with an 87.5% reduction in NOx emissions. At both load points low PM emissions were observed with RCCI combustion. A low NOx RCCI combustion system has multiple advantages over other combustion approaches, these include; significantly lower NOx and PM emission which allows a reduction in aftertreatment cost and packaging requirements along with application of higher CNG substitution rates resulting in reduced CO2 emissions.
Experimental And Numerical Study Of The Combustion And Emissions Of Natural Gas Diesel Dual Fuel Engine Under Different Engine Load Speed Conditions
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Author : Amin Yousefi
language : en
Publisher:
Release Date : 2019
Experimental And Numerical Study Of The Combustion And Emissions Of Natural Gas Diesel Dual Fuel Engine Under Different Engine Load Speed Conditions written by Amin Yousefi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
Universal concerns about degradation in air quality, stringent emissions regulations, energy scarcity, and global warming have prompted research and development of compressed ignition engines using alternative combustion concepts. Natural gas/diesel dual-fuel combustion is an advanced combustion concept for compression ignition diesel engines, which has attracted global attention in recent years. This combustion concept is accomplished by creating reactivity stratification in the cylinder via the use of two fuels characterized by distinctly different reactivities. The low reactivity and main fuel (i.e., natural gas) is firstly premixed with air and then charged into the cylinder through the intake manifold, and the high reactivity fuel (i.e., diesel) is then injected into the charged mixture through a direct injector. This combustion concept offers prominent benefits in terms of a significant reduction of particulate matter (PM) and sometimes nitrogen oxides (NOx) emissions while maintaining comparable fuel efficiency compared to diesel engine. However, low thermal efficiency and high greenhouse gas (GHG) emissions under low load conditions are major challenges which prevented the implementation of dual-fuel concept in commercial automative engines. The present study investigates different combustion approaches with the aim to enhance combustion performance and reduce emissions of unburned methane, CO, NOx, soot, and GHG of natural gas/diesel dual-fuel engines under different engine load-speed conditions. In particular, the main focus of this thesis is on low load conditions where GHG emissions of conventional natural gas/diesel dual-fuel engine is much higher than that of conventional diesel engine. Alongside the experimental study, a computational fluid dynamic (CFD) model is developed to help understand the behaviour of natural gas/diesel dual-fuel combustion process under different engine load-speed conditions. The studied approaches showed that the fuel efficiency and GHG emissions of natural gas/diesel dual-fuel engine can be significantly improved under low engine load conditions compared to diesel engine.
An Experimental Study Of Dual Fueling With Port Injection In A Single Cylinder Air Cooled Hsdi Diesel Engine
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Author : Patrick Brian Dunbeck
language : en
Publisher:
Release Date : 2009
An Experimental Study Of Dual Fueling With Port Injection In A Single Cylinder Air Cooled Hsdi Diesel Engine written by Patrick Brian Dunbeck and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
An Experimental Investigation Of Dual Injection Strategies On Diesel Methane Dual Fuel Low Temperature Combustion In A Single Cylinder Research Engine
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Author : Aamir Sohail
language : en
Publisher:
Release Date : 2015
An Experimental Investigation Of Dual Injection Strategies On Diesel Methane Dual Fuel Low Temperature Combustion In A Single Cylinder Research Engine written by Aamir Sohail and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
The present manuscript discusses the performance and emission benefits due to two diesel injections in diesel-ignited methane dual fuel Low Temperature Combustion (LTC). A Single Cylinder Research Engine (SCRE) adapted for diesel-ignited methane dual fuelling was operated at 1500 rev/min and 5 bar BMEP with 1.5 bar intake manifold pressure. The first injection was fixed at 310 CAD. A 2nd injection sweep timing was performed to determine the best 2nd injection timing (as 375 CAD) at a fixed Percentage Energy Substitution (PES 75%). The motivation to use a second late injection ATDC was to oxidize Unburnt Hydrocarbons (HC) generated from the dual fuel combustion of first injection. Finally, an injection pressure sweep (550-1300 bar) helped achieve simultaneous reduction of HC (56%) and CO (43%) emissions accompanied with increased IFCE (10%) and combustion efficiency (12%) w.r.t. the baseline single injection (at 310 CAD) of dual fuel LTC.
Experimental Investigation Of The Equivalence Ratio Influence On Combustion Performance And Exhaust Emissions Of A Dual Fuel Diesel Engine Operating On Synthetic Biogas Fuel
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Author :
language : en
Publisher:
Release Date : 2017
Experimental Investigation Of The Equivalence Ratio Influence On Combustion Performance And Exhaust Emissions Of A Dual Fuel Diesel Engine Operating On Synthetic Biogas Fuel written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
An Experimental Investigation Of Diesel Ignited Gasoline And Diesel Ignited Methane Dual Fuel Concepts In A Single Cylinder Research Engine
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Author : Umang Dwivedi
language : en
Publisher:
Release Date : 2013
An Experimental Investigation Of Diesel Ignited Gasoline And Diesel Ignited Methane Dual Fuel Concepts In A Single Cylinder Research Engine written by Umang Dwivedi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Co-combustion categories.
Diesel-ignited gasoline and diesel-ignited methane dual fuel combustion experiments were performed in a single-cylinder research engine (SCRE), outfitted with a common-rail diesel injection system and a stand-alone engine controller. Gasoline was injected in the intake port using a port-fuel injector, whereas methane was fumigated into the intake manifold. The engine was operated at a constant speed of 1500 rev/min, a constant load of 5.2 bar IMEP, and a constant gasoline/methane energy substitution of 80%. Parameters such as diesel injection timing (SOI), diesel injection pressure, and boost pressure were varied to quantify their impact on engine performance and engineout ISNOx, ISHC, ISCO, and smoke emissions. The change in combustion process from heterogeneous combustion to HCCI like combustion was also observed.
An Experimental Investigation Of Lean Burn Dual Fuel Combustion In A Heavy Duty Diesel Engine
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Author : Ian Alexander May
language : en
Publisher:
Release Date : 2018
An Experimental Investigation Of Lean Burn Dual Fuel Combustion In A Heavy Duty Diesel Engine written by Ian Alexander May and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
A Theoretical And Experimental Study Of Emissions Modeling For Diesel Engines With Comparisons To In Cylinder Imaging
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Author : Gregory James Hampson
language : en
Publisher:
Release Date : 1997
A Theoretical And Experimental Study Of Emissions Modeling For Diesel Engines With Comparisons To In Cylinder Imaging written by Gregory James Hampson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
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