Wyniki wyszukiwania - BazTech

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Comparative study of combustion and emissions of diesel engine fuelled with FAME and HVO

Hunicz Jacek, Krzaczek Paweł, Gęca Michał, Rybak Arkadiusz, Mikulski Maciej

Combustion Engines

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2021

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R. 60, nr 1

72--78

EN

This study investigates combustion and emission characteristics of a contemporary single-cylinder compression ignition engine fuelled with diesel, fatty acid methyl esters (FAME) and hydrotreated vegetable oil (HVO). These two drop-in fuels have an increasing share in automotive supply chains, yet have substantially different physical and auto-ignition properties. HVO has a lower viscosity and higher cetane number, and FAME has contrary characteristics. These parameters heavily affect mixture formation and the following combustion process, causing that the engine preoptimized to one fuel option can provide deteriorated performance and excess emissions if another sustainable option is applied. To investigate the scale of this problem, injection pressure sweeps were performed around the stock, low NOx and low PM engine calibration utilizing split fuel injection. The results showed that FAME and HVO prefer lower injection pressures than diesel fuel, with the benefits of simultaneous reduction of all emission indicators compared to DF. Additionally, reduction of injection pressure from 80 MPa to 60 MPa for biodiesels at low engine load resulted in improved brake thermal efficiency by 1 percentage point, due to reduced parasitic losses in the common rail system.

2

Potencjał hydrorafinowanego oleju roślinnego (ang. HVO - Hydrotreated Vegetable Oil) jako biopaliwa wysokoreaktywnego w dwupaliwowych układach zasilania

Chojnowski Janusz, Nogas Patrycja

Biuletyn Wojskowej Akademii Technicznej

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2021

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Vol. 70, nr 2

73--87

PL

w czasach intensywnych badań dotyczących zmniejszenia emisji gazów cieplarnianych do atmosfery z sektora motoryzacyjnego inżynierowie i badacze znajdują efektywne rozwiązania umożliwiające osiągnięcie ten cel. Emisję dwutlenku węgla można zmniejszyć poprzez zwiększenie sprawności silnika spalinowego lub zmniejszenie zawartości węgla w spalanym paliwie. Połączeniem obu tych założeń może być wykorzystanie nowoczesnych układów zasilania dwupaliwowego do silników o zapłonie samoczynnym (zs), w których dawką pilotażową paliwa wysokoreaktywnego jest hydrorafinowany olej roślinny HVO) będący ekologicznym substytutem oleju napędowego. temat wykorzystania HVO jako paliwa pilotażowego jest niezbadany empirycznie, jednak informacje dostępne na jego temat wskazują na zasadność takich zastosowań.

EN

In times of increased efforts to reduce greenhouse gas emissions to the atmosphere from the automotive sector, engineers and researchers are finding effective solutions to achieve this goal. The reduction of carbon dioxide emissions can be achieved by increasing the efficiency of the internal combustion engine or by reducing the carbon content in the fuel burned. The combination of both of these assumptions can be the use of modern dual-fuel systems for diesel engines in which the pilot dose of highly reactive fuel is hydrotreated vegetable oil (HVO), which is an ecological substitute for diesel oil. The topic of the use of HVO as a pilot fuel is empirically unexplored, however the available information on it indicates the validity of such applications.

3

Environmental assessment of the exploitation of diesel engines powered by biofuels

Grzelak Paulina Luiza, Żółtowski Andrzej

Combustion Engines

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2020

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R. 59, nr 1

31--35

EN

Many factors, such as climate change and the associated risk of increasing the average temperature on the globe, energy security and the finishing of fossil fuel deposits have caused other renewable energy sources to be sought. Transport, as a branch of industry largely responsible for air pollution and greenhouse gas emissions in large cities, requires the necessary changes in the way vehicles are powered. Until now, the fuels available at petrol stations use admixtures of first generation biofuels, such as bioethanol, as a 5% additive to motor gasolines and biodiesel (FAME) as a 7% additive to diesel oil. The article presents the idea of biorefinery installations, specifies the spectrum of substrates of the second and advanced generations, which may be a biorefinery input, including waste oils that can be used to produce hydrogenated HVO vegetable oils and other high-value products. The paper presents he existing biorefinery plant in Venice resulting from the transformation of a conventional oil refinery in which HVO fuel is produced. The article also presents the parameters of this new biofuel and compared them with the parameters of other fuels used to power self-ignition engines, such as FAME and diesel, along with discussing the prospects for HVO fuel development in Europe.

4

Charakterystyka wielopierścieniowych węglowodorów aromatycznych emitowanych z silnika wysokoprężnego zasilanego biopaliwami I i II generacji

Czarnocka J., Odziemkowska M.

Chemik

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2016

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Vol. 70, nr 8

419--425

PL

W artykule zaprezentowano charakterystykę wielopierścieniowych węglowodorów aromatycznych emitowanych podczas spalania biopaliw transportowych. Do eksperymentów wybrano samochód osobowy wyposażony w silnik wysokoprężny, spełniający wymagania Euro 5. Pojazd zasilano biopaliwem zawierającym mieszanki FAME oraz HVO. Otrzymane wyniki porównywano do wartości otrzymanych dla handlowego oleju napędowego.

EN

The polycyclic aromatic hydrocarbons (PAHs) emitted during the combustion of the biofuels used in transport have been characterized. The experiments were carried out on a motor car with a diesel engine, meeting the Euro 5 standard requirements. The vehicle was powered with biofuel blends containing fatty acid methyl ester (FAME) and hydrogenated vegetable oil (HVO). The test results were compared with the corresponding values obtained for the commercial diesel oil.