Ecological impact of CNG/gasoline bi-fuelled vehicles

Šmigins, Ruslans

doi:10.22616/erdev2017.16.n022

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…Summing up the considerations on biodiesel, it can be said that biodiesel is produced in the form of rapeseed oil [86][87][88][89][90], sunflower oil [91][92][93] or palm oil [78,94,95] or obtained from wood biomass [96]. Moreover, mixtures of diesel oil with NG [63,76,97,98], CNG [99][100][101] and LNG [102][103][104] or diesel fuel with Brown's gas [105] are used.…”

Section: Current Sources Of Energy For Road Vehiclesmentioning

confidence: 99%

“…The authors presented the main environmental advantages and limitations of the use of this fuel in road transport, such as limited number of refueling stations, vehicle range, limited loading space due to gas tanks or longer refueling time compared to petrol or diesel. The environmental benefits of using CNG in a dual-fuel gasoline engine are presented in study [100]. In turn, Szpica and Dziewi ątkowski carried out research on the measurement of the catalyst conversion factor in an engine powered by CNG at various operating temperatures.…”

Section: Current Sources Of Energy For Road Vehiclesmentioning

confidence: 99%

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Overview of Energy Harvesting Technologies Used in Road Vehicles

et al. 2023

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Road transport is one of the most important factors for the national economy due to its universality and comprehensive possibilities of transporting people and goods. Unfortunately, from the energy point of view, it is also the most cost-intensive and has a negative influence on the natural environment. For these reasons, issues related to limiting the use of conventional fuels are very important, which results in reducing emissions from this sector, as well as reducing transport costs. This article presents currently used energy sources for propulsion of road vehicles, including fossil and alternative fuels, gaseous fuels and other energy sources such as fuel cells. The following section presents technologies that allow to recover some of the energy lost in motor vehicles and internal combustion engines used for their propulsion. The principle of operation of these solutions, their structure and their main features are presented. The last part focuses on discussing and identifying the most universal technologies for energy harvesting in vehicles and showing further directions of energy development in the automotive sector.

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Section: Current Sources Of Energy For Road Vehiclesmentioning

confidence: 99%

Section: Current Sources Of Energy For Road Vehiclesmentioning

confidence: 99%

Overview of Energy Harvesting Technologies Used in Road Vehicles

et al. 2023

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“…The conversion of diesel-powered vehicles to gas fuels deserves special attention. Technologies for the conversion of diesel engines to methane or liquefied petroleum gas (propane-butane) are known [23]. However, these gases are a non-renewable resource that can be used in a limited way.…”

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confidence: 99%

Research of Energy Efficiency and Environmental Performance of Vehicle Power Plant Converted to Work on Alternative Fuels

Mateichyk,

Kryshtopa,

Kryshtopa

et al. 2024

Machines

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The use of alternative fuels remains an important factor in solving the problem of reducing harmful substances caused by vehicles and decarbonising transport. It is also important to ensure the energy efficiency of vehicle power plants when using different fuels at a sufficient level. The article presents the results of theoretical and experimental studies of the conversion of diesel engine to alternative fuels with hydrogen admixtures. Methanol is considered as an alternative fuel which is a cheaper alternative to commercial diesel fuel. The chemical essence of improving the calorific value of alternative methanol fuel was investigated. Studies showed that the energy effect of burning an alternative mixture with hydrogen additives exceeds the effect of burning the same amount of methanol fuel. The increase in combustion energy and engine power is achieved as a result of heat from efficient use of the engine exhaust gases and chemical conversion of methanol. An experimental installation was created to study the work of a converted diesel engine on hydrogen–methanol mixtures and thermochemical regeneration processes. Experimental studies of the energy and environmental parameters of diesel engine converted to work on an alternative fuel with hydrogen admixtures have shown that engine power increases by 10–14% and emissions of harmful substances decrease.

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A Study of Heat Recovery and Hydrogen Generation Systems for Methanol Engines

Kryshtopa,

Smigins,

Kryshtopa

2024

Energies

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Biofuels are the most essential types of alternative fuels, which currently have significant potential to reduce CO2 emissions compared to fossil fuels. Methanol is a more efficient fuel than petrol due to its physicochemical properties, such as a higher latent heat of vaporization, research octane number, and heat of combustion of the fuel–air mixture. Also, biomethanol is cheaper than traditional petrol and diesel fuel for agricultural countries. The authors have proposed a new approach to improve the characteristics and efficiency of methanol diesel engines by using biomethanol mixed with hydrogen instead of pure biomethanol. Using a hydrogen–biomethanol mixture in modern engines is an effective method because hydrogen is a carbon-free, low-ignition, highest-flame-rate, high-octane fuel. A small quantity of hydrogen added to biomethanol and its combustion in an engine with a heat exchanger increases the combustion temperature and heat release, increases engine power, and reduces fuel consumption. This article presents experimental results of methanol combustion and a hydrogen-in-methanol mixture if hydrogen was retained due to the utilization of the heat of the exhaust gases. The tests were carried on a single-cylinder experimental engine with an injection of liquid methanol and gaseous hydrogen mixtures. The experiments showed that green hydrogen generated onboard the car due to the utilization of heat significantly reduced fuel costs of engines of vehicles and technological installations. It was established a hydrogen gaseous mixture addition of up to 5% by mass to methanol requires a corresponding change in the coefficient of excess air to λ = 1.25. Also, using an additional hydrogen mixture requires adjustment at the ignition moment in the direction of its decrease by 4–5 degrees of the engine crankshaft. Hydrogen gas mixture addition reduced methanol consumption, reaching a maximum reduction of 24%. The maximum increase in power was 30.5% based on experimental data. The reduction in the specified fuel consumption, obtained after experimental tests of the methanol research engine on the stand, can be implemented on the vehicle engines and technological installations equipped with an onboard heat recovery system. Such a system, due to the utilization of heat and the supply of additional hydrogen, can be implemented for engines that work on any alternative or traditional fuels.

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Ecological impact of CNG/gasoline bi-fuelled vehicles

Cited by 3 publications

References 7 publications

Overview of Energy Harvesting Technologies Used in Road Vehicles

Overview of Energy Harvesting Technologies Used in Road Vehicles

Research of Energy Efficiency and Environmental Performance of Vehicle Power Plant Converted to Work on Alternative Fuels

A Study of Heat Recovery and Hydrogen Generation Systems for Methanol Engines

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