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Wyświetlanie 1-4 z 4
Tytuł:
New European biofuels for diesel engines
Autorzy:
Sitnik, L. J.
Powiązania:
https://bibliotekanauki.pl/articles/243532.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
combustion engines
alternative fuels
biofuels
butanol
Opis:
The World is strongly dependent on crude oil for its transport needs. In order to diminish this dependence, we need to introduce clean, CO2-efficient, secure and affordable transportation fuels. The development of innovative biofuel technologies will help to cover significantly (up to 25% in Europe) road transport fuel needs. Biofuels production of 33 billion litres in 2004 is small compared to 1200 billion litres of gasoline produced annually worldwide. The current production of liquid biofuels in the EU 25 is about 2 Mtoe, which is less than 1% of the market. Recent assessments have concluded that the 2010 targets, 18 Mtoe used in the transport sector, are unlikely to be achieved. There can be three basic possibilities of accomplishing this target: i) use of alcohols (first of all ethanol) and their mixing with petrol; ii) use of fatty acids esters (methyl or ethyl) of vegetable oils and their mixing with diesel fuel, iii) use of synthetic hydrocarbons of the synthetic gas coming from biomass resources and eventually their mixing with other ,,classical" hydrocarbons. This paper presents a novel way of utilizing alcohols as fuels for a diesel engine. It is proposed to use heavy alcohols as a mix with conventional diesel fuel. The possibility to use a mix of butanol (as heavy alcohol) with conventional diesel fuel is demonstrated. Butanol has some key advantages over ethanol and light hydrocarbons (petrol), including higher energy content and better transport characteristics. Moreover, butanol is hydrophobic, so a new logistic infrastructure is not necessary. This paper demonstrates that a diesel-butanol fuel mixture is supplied to a diesel engine without any problems. A consumption of proposed biofuel mixture from +35% to -35% of typical diesel fuel depends on many factors not only on fuel energy density. A near-term effort of BP Biofuels and DuPont to develop and commercialize biobutanol is well-known. Here, it is proposed a new technological process combining electricity generation in fuel cells with electrolysis and a production of butanol from ethanol, which gives an opportunity to reduce today,'s over production of ethanol without a necessary change of existing infrastructure.
Źródło:
Journal of KONES; 2008, 15, 3; 487-491
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Future mobility without internal combustion engines and fuels?
Czy w przyszłości transport będzie mógł funkcjonować bez silników spalinowych i paliw?
Autorzy:
Lenz, H. P.
Powiązania:
https://bibliotekanauki.pl/articles/133507.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
transport
combustion engines
engine fuels
alternative powertrain
alternative fuels
silnik spalinowy
paliwa silnikowe
napęd alternatywny
paliwa alternatywne
Opis:
For many decades to come, and in the foreseeable future, internal combustion engines – in many cases with electric motors – will be with us, just like the liquid fuels they require. The importance of crude oil will decline, as these fuels will be increasingly produced on a synthetic basis without CO2 emissions. The answers to the question "Future Mobility without internal Combustion Engines and Fuels?" are "no" in both cases. Purely battery-electric mobility will be applied in the future only in specific areas. fuel-cell vehicles will hardly be used because of the extreme infrastructure investment costs. In contrast, liquid fuels will ensure the future of mobility. in this scenario, energy such as solar or wind energy will be generated without CO2 emissions.
Silniki spalinowe funkcjonują jako źródła napędu pojazdów już ponad 100 lat i w dającej się przewidzieć przyszłości wciąż będą powszechnie stosowane, podobnie jak paliwa płynne potrzebne do ich zasilania. Znaczenie ropy naftowej będzie jednak powoli malało w miarę wzrostu skali produkcji paliw syntetycznych, w procesach zapewniających małą emisję CO2. Odpowiedź na pytanie: czy transport w przyszłości będzie odbywać się bez silników spalinowych i paliw brzmi: nie. Napęd elektryczny stosowany będzie tylko na wybranych obszarach. Pojazdy wykorzystujące ogniwa paliwowe nigdy nie osiągną większej popularności ze względu na wysokie koszty budowy niezbędnej infrastruktury. Tylko paliwa płynne będą w stanie zaspokoić przyszłościowe potrzeby transportu. Do ich wytworzenia wykorzystywana będzie jednak energia ze źródeł o zerowej emisji CO2, jak na przykład baterie słoneczne, czy farmy wiatrowe.
Źródło:
Combustion Engines; 2013, 52, 4; 3-15
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of combustion process in dual fuel diesel engine
Autorzy:
Żółtowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/247295.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
road transport
combustion engines
air pollution
environmental protection
alternative fuels
combustion
Opis:
In this paper are presented results of dual fuel diesel engine bench testing carried out by author. The engine was fuelled parallel with two fuels. The second, additional fuel was compressed natural gas (CNG). CNG was injected into engine inlet system before inlet to engine turbocharger. There was installed a pressure transducer in one of engine cylinders and cylinder pressure was registered at the time of testing. There is discussed place and way of pressure sensor installation and impact on quality of indicating signals of the channel connecting the transducer with combustion chamber. The carried out investigations included measurement of emissions and engine indicating completed with the heat release characteristics. There was considered influence of CNG on CO, NOx, THC and NMHC emissions, especially how pollutant emissions depend on the share of methane in fuel. The effect of using natural gas as an additional fuel injected to regular CI engine on heat release rate was investigated, as well as its rate and duration. Discussed the differences between combustion of methane and diesel oil and ways of spreading flames into air-fuel mixture for these two mixed fuels The processes of combustion of diesel oil and methane are totally different. The study searches for the limits of methane content due to knocking combustion. Additive of methane to the diesel fuel is a reason of retarded heat release, decrease of engine efficiency, greater fuel consumption and changes in emissions corresponding to the lag of self-ignition
Źródło:
Journal of KONES; 2014, 21, 2; 303-309
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tyre pyrolysis oil as an engine fuel
Autorzy:
Żółtowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/247415.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
road transport
combustion engines
air pollution
environmental protection
alternative fuels
combustion
Opis:
Tests have been carried out to evaluate the performance, emissions and heat release characteristics of a double cylinder direct injection diesel engine fuelled with tyre pyrolysis oil and diesel oil. The combustion parameters such as heat release rate, cylinder peak pressure, maximum rate of cylinder pressure, combustion knocking were also analysed. For purposes of this work raw pyrolysis oil was derived from waste vehicle tyres through vacuum pyrolysis realized in experimental installation. Results showed that the brake thermal efficiency of the engine fuelled with pyrolysis oil increased. THC, CO and CO2 emissions were found to be higher due to high aromatic content and longer ignition delay, whereas NOx shows increasing tendency due to greater heat release rate. The cylinder peak pressure did not change. The ignition delay became greater what can be the reason of problems with combustion knocking. Pyrolysis oil has a mass fraction of individual elements similar to diesel fuel but the chemical composition of hydrocarbons included in these fuels is different. The product of pyrolysis contains too much soot, sulphur, light and heavy hydrocarbons fractions for direct using it in engine. Aromatics content gives this fuel a distinctive smell. Pyrolysis oil is toxic and dangerous in use due to the polycyclic aromatic hydrocarbons (PAH). However raw pyrolysis oil is not suitable to use it as a CI fuel and requires additional distillation before using it in diesel engines as an alternative fuel in the future.
Źródło:
Journal of KONES; 2014, 21, 1; 295-302
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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