The use of natural gas (NG) in dual-fuel heavy-duty engines has the potential to reduce pollutant and greenhouse gas (GHG) emissions from the transport sector when compared to the conventional diesel engines. However, NG composition and methane slip…
An analysis of the literature on the use of natural gas shows a significant increase in the number of natural gas-powered vehicles, both in road and sea transport, and diesel-fueled vehicles adapted to run on natural gas. Due to its combustion…
Areas located at or near natural gas (NG) well or storage sites can use NG to partially or totally replace the diesel fuel used to power equipment or for local transportation. This study investigated a dual-fuel diesel-NG engine operating at low load…
Dual-fuel (DF) combustion using natural gas and diesel has received considerable attention in the on- and off-road freight transportation sectors owing to its potential use in achieving better fuel economy and cleaner combustion. To determine the…
This paper examines the environmental impact of Natural Gas (NG) as a transportation fuel, particularly for marine transportation use. The aim is to provide a systematic evaluation of Greenhouse Gas (GHG) emissions in the upstream fuel supply chain…
Natural gas is considered a potentially available and ecologically preferable fuel, comparing to other liquid fossil fuels. Safe and sustainable energy storage device is one of the bases for changing the current energy systems. The system is to use…
The combustion of natural gas reduces fuel cost and generates less emissions of carbon dioxide and particulate matter (PM) than diesel and gasoline. Replacing diesel by natural gas in internal combustion engines is of great interest for…
Energy fraction of the main (premixed) fuel and pilot injection timing are important in dual-fuel pilot diesel ignition engine. In the present study, natural gas, which is the main premixed fuel, is induced into the engine through the intake port,…
Diesel engines have been widely used due to the higher reliability and superior fuel conversion efficiency. However, they still generate significant amount of carbon dioxide (CO2) and particulate matter (PM) emissions. Natural gas is a low carbon and…
In this research, a newly proposed method combining Chemkin with CONVERGE was used to study the transient in-cylinder chemical reaction process in NG-diesel dual fuel engine. The selected mechanism was verified by comparing the results of CONVERGE…
Dual-fuel premixed charge compression ignition (DF-PCCI) combustion has been proven to be a viable alternative to conventional diesel combustion in heavy-duty compression ignition engines due to its low nitrogen oxides (NOx) and particulate matter…
The dual fuel combustion mode, the use of bi-fueled natural gas and diesel fuel, is an attractive alternative to standard spark ignition or compression ignition combustion modes due to potential benefits of lower CO2 emissions, lower fuel costs and…
Technology developments in directional drilling and hydraulic fracturing have led to increased natural gas reserves. Development of these unconventional resources is an energy intensive process. Prime-movers of unconventional well development were…
A parametric study on some combustion characteristics was carried out in a natural gas fueled dual plugs SI engine. Mass fraction burned, cylinder pressure histories and combustion durations of the engine were investigated by three equivalence ratio…
In order to propose the control strategies based on exergy to realize efficient and energy-saving operation of the engine, the energy and exergy balance under sensitive boundary conditions were analyzed with the first and second laws of…
The paper evaluates different strategies of dual fuel (DF) operation in search of a solution that enables DF at low load. The strategies that were explored are conventional DF with increased intake temperature, split injection, and reactivity…
The paper presents the results of examination of particulate matter emission from the Diesel engine FPT 1.3 MJT simultaneously fuelled with diesel oil and natural gas CNG. The basic premise for engine adaptation was the addition of a small amount of…
The demand for higher output efficiencies, greater specific power output, increased reliability, and ever reduced emissions has been rising. One promising alternative is the use of a gaseous fuel as partial supplement to liquid fuel. In this study,…
High-pressure direct-injection (HPDI) natural gas engines continue to draw much attention for the highly efficient and clean combustion process compared to traditional diesel engines. However, the real ignition processes of HPDI natural gas engines…
The disadvantages of the separate use of gasoline and CNG pose great challenges to the development of spark ignition (SI) engines. One of the major obstacles to achieving higher thermal efficiency in gasoline engines is the knocking phenomenon. One…
The Paris agreement is exerting pressure on industries that generate significant greenhouse gas (GHG) emissions, such as transportation. Electrification can help reduce GHG emissions from light duty vehicles, but it is unfeasible for heavy duty…
In this research, it was investigated the energy fraction and emission characteristics of natural gas/diesel dual-fuel combustion in terms of the combustion index such as combustion duration and mass fraction burned 50% (MFB50) of a 6-L heavy-duty…
Environmental benefits are one of the main motivations encouraging the use of natural gas as fuel for internal combustion engines. In addition to the better impact on pollution, natural gas is available in many areas. In this context, the present…
Compressed natural gas/Diesel dual-fuel combustion mode, the partial replacement of diesel fuel with cleaner fuel, is one of the most important strategies to achieve clean efficient combustion. Thus, the current work investigated the effect of…
The effective density and mixing state of particles emitted from a natural gasdiesel dual fuel engine are investigated. Measurements were conducted at three different fuel compositions including 100% diesel fuel (0% NG), 75% diesel25% natural gas…
The paper presents results of experimental research on a dual-fuel engine powered by diesel fuel and natural gas enriched with hydrogen. The authors attempted to replace CNG with hydrogen fuel as much as possible with a constant dose of diesel fuel…
Compressed natural gas (CNG) is a promising alternative fuel for compression ignition (CI) engines under dual-fuel (DF) mode operation. Its application on commercial heavy-duty multicylinder diesel engines is scarcely reported, and its potential…
A genetic algorithm(GA)numerical optimization platform was developed by coupling a micro GA code with a computational fluid dynamics(CFD)code. Based on this optimization platform, natural gas and diesel dualfuels combustion was systematically…
The separate use of gasoline or natural gas (NG) in engines has some advantages and disadvantages, which make it difficult to choose one over the other. It seems that using a combination of these two can compensate for the disadvantages. In the…
The effects of intake pressures and EGR rates on the natural gas/diesel dual-fuel combustion under a high load condition (brake power of 100 kW) were evaluated using a 6-L CI engine in this study. Natural gas fraction was fixed as 80% of total input…
Areas located at or near natural gas (NG) well or storage sites can use NG to partially or totally replace the diesel fuel used to power equipment or for local transportation. This study investigated a dual-fuel diesel-NG engine operating at low load…
This project carried out a computational fluid dynamics (CFD) analysis using ANSYS Fluent 14.5 software to design a compressed natural gas (CNG)-air mixer for CNG-diesel dual fuel engine. This study aimed to examine the performance of existing…
In dual-fuel combustion, the levels of total hydrocarbon (THC) emissions have increased, unlike the neat diesel compression ignition (CI) combustion. Intuitively, it can be inferred that most THC emissions are produced by the crevice effect of…
The addition of natural gas (NG) with diesel fuel is an attempt to increase the combustion efficiency of the diesel engine and to reduce nitrogen-based emissions in this investigation. A three-dimensional computational study has been carried out on…
In this study, natural gas and diesel dual-fuel combustion in a heavy-duty compression ignition engine is experimentally evaluated by adopting a modified multi-angle nozzle of a diesel injector to reduce the global warming impact (GWI) factor while…
Diesel/natural gas dual fuel engine is prone to misfire, knock and other unstable combustion phenomena, resulting in excessive cycle variation. In order to better understand the influence of combustion mode on cycle variation of diesel/natural gas…
Natural gas/diesel dual-fuel combustion is one of the most promising low-temperature combustion strategies. However, unstable combustion processes under low engine loads restrain the development of this strategy. To overcome this problem, a…
Dual fuel engines that leverage gaseous fuels have existed for over a century, but advances in fuel injection technologies and electronic control have drastically changed the methods of combustion control used in automotive applications over this…
Considering the revised standards pertaining to the regulations on the carbon dioxide emissions of marine engines by international maritime organizations, the use of low- or zero-carbon fuel is necessitated to reduce greenhouse gas emissions from the…
The paper is dedicated to conversion of a truck diesel engine into a gas diesel engine. Different ways of diesel engine conversion for operation on natural gas were analyzed. The gas diesel working process with minimized portion of igniting diesel…
This project carried out a computational fluid dynamics (CFD) analysis using ANSYS Fluent 14.5 software to design a compressed natural gas (CNG)-air mixer for CNG-diesel dual fuel engine. This study aimed to examine the performance of existing…
In dual-fuel combustion, the levels of total hydrocarbon (THC) emissions have increased, unlike the neat diesel compression ignition (CI) combustion. Intuitively, it can be inferred that most THC emissions are produced by the crevice effect of…
The addition of natural gas (NG) with diesel fuel is an attempt to increase the combustion efficiency of the diesel engine and to reduce nitrogen-based emissions in this investigation. A three-dimensional computational study has been carried out on…
In this study, natural gas and diesel dual-fuel combustion in a heavy-duty compression ignition engine is experimentally evaluated by adopting a modified multi-angle nozzle of a diesel injector to reduce the global warming impact (GWI) factor while…
Diesel/natural gas dual fuel engine is prone to misfire, knock and other unstable combustion phenomena, resulting in excessive cycle variation. In order to better understand the influence of combustion mode on cycle variation of diesel/natural gas…
Natural gas/diesel dual-fuel combustion is one of the most promising low-temperature combustion strategies. However, unstable combustion processes under low engine loads restrain the development of this strategy. To overcome this problem, a…
Considering the revised standards pertaining to the regulations on the carbon dioxide emissions of marine engines by international maritime organizations, the use of low- or zero-carbon fuel is necessitated to reduce greenhouse gas emissions from the…
Dual-fuel (DF) combustion using natural gas and diesel has received considerable attention in the on- and off-road freight transportation sectors owing to its potential use in achieving better fuel economy and cleaner combustion. To determine the…