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  1. 4 Combustion Engines
  2. 3 Journal of KONES
  3. 2 Inżynieria Chemiczna i Procesowa
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  1. 4 Flekiewicz M.
  2. 2 Grzesik M.
  3. 2 Idzior M.
  4. 2 Karpiuk W.
  5. 2 Kneba Zbigniew
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  1. 1 2024
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1
Content available Impacts of Using Exhaust Gas Recirculation and Various Amount of Dimethyl Ether Premixed Ratios on Combustion and Emissions on a Dual-Fuel Compression Ignition Engine
Stepanenko Denys, Rudnicki Jacek, Kneba Zbigniew
Advances in Science and Technology. Research Journal
|
2024
|
Vol. 18, no 2
196--213
EN
In the presented research, the authors dealt with the specific properties of the combustion process of dimethyl ether (DME) in a combustion car (Volkswagen Golf IV) engine AJM 1.9 TDI PDE made by Volkswagen factory. Dimethyl ether is an alternative fuel produced most often from natural gas, which can be used in compression ignition engines as a single fuel or co-burned with diesel oil. This work describes the impacts of using exhaust gas recirculation system and various diesel to DME substitution ratios from 0% to approximately 25% (on an energy basis), on the combustion process in a dual-fuel diesel engine. The engine has been modified so that DME fuel is introduced into the intake manifold just before the intake valves. The diesel fuel supply system, operation algorithms of the engine electronic control unit and other engine elements were left unchanged as it was built by the manufacturer
2
Content available DME as a fuel for SI engines cars
Fabiś Paweł
Diagnostyka
|
2021
|
Vol. 22, No. 1
93--99
EN
The article presents an analysis of the possibility of using DME fuel to power internal combustion engines. The possibilities of using DME as an engine fuel in relation to world and European achievements have been widely discussed. Moreover, the preliminary results of the tests determining the possibility of using the DME-LPG mixture to power the diesel engine are presented. The research consisted in determining the influence of the DME-LPG mixture on the power and torque of the engine at various loads. The changes in the temperature of the exhaust gases were also determined in relation to the different proportions of DME in the mixture.
PL
W artykule przedstawiono analizę możliwości zastosowania paliwa DME do zasilania silników spalinowych. Przeprowadzono szerokie omówienie możliwości zastosowania DME jako paliwa silnikowego w odniesieniu do osiągnięć światowych i europejskich. Ponadto przedstawiono wstępne wyniki badań określających możliwość zastosowania mieszaniny DME - LPG do zasilania silnika ZI. Badania polegały na określeniu wpływu mieszaniny DME - LPG na moc i moment obrotowy silnika przy różnych jego obciążeniach. Określono także zmiany temperatury gazów wylotowych w odniesieniu do różnych udziałów DME w mieszaninie.
3
Content available Selected aspects of the use of gaseous fuels blends to improve efficiency and emission of si engine
Kubica Grzegorz, Flekiewicz Marek, Marzec Paweł
Transport Problems
|
2019
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T. 14, z. 1
95--103
EN
The paper presents results of SI engine tests, carried on for different gaseous fuels. The analysis carried out made it possible to define the correlation between fuel composition and engine operating parameters. Tests cover various gaseous mixtures: methane with hydrogen and LPG with DME. The first group, considered as low carbon content fuels, can be characterized by low CO2 emissions. The flammability of hydrogen added in those mixtures realizes the function of combustion process activator and improves the energy conversion. The second group of fuels is constituted by LPG and DME mixtures. DME mixes perfectly with LPG and differently than in the case of other hydrocarbon fuels also consisting of oxygen, which makes the stoichiometric mixture less oxygen demanding. In the case of this fuel, improvement in engine volumetric and overall engine efficiency has been noticed, compared to LPG. During the tests, standard CNG/LPG feeding systems have been used, which underlines the utility value of the research.
4
Content available DME as alternative fuel for compression ignition engines - a review
Stepanenko Denys, Kneba Zbigniew
Combustion Engines
|
2019
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R. 58, nr 2
172--179
EN
The ecological issues and the depletion of crude oil, has led the researchers to seeking for non-petroleum based alternative fuels, along with more advanced combustion technologies, and after-treatment systems. The use of clean alternative fuels is the one of the most perspective method that aiming at resolving of the said issues. One of the promising alternative fuels that can be used as a clean high-efficiency compression ignition fuel with reduced of toxic emissions is dimethyl ether (DME). Moreover, it can be produced from various feedstocks such as natural gas, coal, biomass and others. This article describes the properties and the potential of DME application on the combustion and emission reduction characteristics of the compression ignition engines.
5
Content available The influence of selected gaseous fuels on the combustion process in the Si engine
Flekiewicz M., Kubica G.
Transport Problems
|
2017
|
T. 12, z. 3
135--146
EN
This paper presents the results of SI engine tests, carried out for different gaseous fuels. The analysis carried out made it possible to define the correlation between fuel composition and engine operating parameters. The tests covered various gaseous mixtures: methane with hydrogen from 5% to 50% by volume and LPG with DME from 5% to 26% by mass. The first group, considered as low-carbon-content fuels can be characterized by low CO2 emissions. Flammability of hydrogen added in those mixtures realizes the function of the combustion process activator. Thus, hydrogen addition improves energy conversion by about 3%. The second group of fuels is constituted by LPG and DME mixtures. DME mixes perfectly with LPG, and differently than other hydrocarbon fuels, consisting of oxygen as well, which makes the stoichiometric mixture less oxygen demanding. In the case of this fuel an improvement in engine volumetric and overall engine efficiency has been noticed compared with LPG. For the 11% DME share in the mixture an improvement of 2% in the efficiency has been noticed. During the tests, standard CNG–LPG feeding systems have been used, which underlines the utility value of the research. The stand-test results have been followed by combustion process simulation including exhaust forming and charge exchange.
6
Content available Assessment of the potential of dimethyl ether as an alternative fuel for compression ignition engines
Smolec R., Idzior M., Karpiuk W., Kozak M.
Combustion Engines
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2017
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R. 56, nr 2
181--186
EN
The main problem that the automotive industry has been dealing with since the beginning of the XXI century is the need to reduce the exhaust emissions from piston combustion engines. Another, not at all less important problem is the depleting natural resources of crude oil. There are many concepts aiming at resolving of the said issues. One of them is the possibility of application of dimethyl ether (DME) in a classic engine. The paper characterizes this fuel, drawing attention to the aspects related to the adaptation of the engine to this type of fuel, presents the process of its atomization and relevant exhaust emissions.
7
Content available Analysis of the possibilities of using of DME fuel in motor boat drive systems
Kropiwnicki J., Dominiczak P., Kneba Z., Makowski S., Cieśliński J. T., Ziółkowski M.
Combustion Engines
|
2017
|
R. 56, nr 4
74--80
EN
The characteristics of alternative fuel for diesel: dimethyl ether (DME) and an analysis of the potential to reduce emissions of toxic compounds by the engines when running on this fuel have been presented in this work. Basic types of design solutions of gas supply and control systems, possible for use in internal combustion engines with DME supply have been also presented. The paper presents a study of the legislation and an analysis of the feasibility of the system storage and fueling DME on board small vessels.
8
Content available remote The impact of various strategies of injection on the emission of the DME powered engine – a review
Smolec R., Idzior M., Karpiuk W.
Journal of Mechanical and Transport Engineering
|
2016
|
Vol. 68, No. 1
83--92
EN
The dynamic development of the automotive industry makes the consumption of diesel oil grow rapidly. Due to the increasing ecological requirements, research is conducted that aims at the reduction of the negative influence of this branch of industry on the environment. One line of research is the search for ecological fuels, such as dimethyl ether. The application of this fuel with a simultaneous use of modern injection systems allowing for injecting fuel under very high pressure enables emission reduction, as compared to diesel oil. It turns out that the combustion of DME in modern self-ignition engines results in almost negligible emission of particulate matter, which used to be one of the main drawbacks of the engines fuelled conventionally.
PL
Dynamiczny rozwój przemysłu motoryzacyjnego sprawia, że zużycie oleju napędowego bardzo szybko rośnie. W związku z rosnącymi wymaganiami ekologicznymi prowadzone są badania mające na celu zmniejszenie uciążliwości na środowisko tej gałęzi przemysłu. Jednym z kierunków prowadzonych badań jest poszukiwanie nowoczesnych paliw ekologicznych, do których możemy zaliczyć eter dimetylowy. Zastosowanie tego paliwa przy wykorzystaniu nowoczesnych układów wtryskowych, pozwalających na wtryskiwanie paliwa pod bardzo wysokim ciśnieniem, pozwala na obniżenie emisji w stosunku do oleju napędowego. Okazuje się, że spalanie DME w nowoczesnych silnikach ZS powoduje niemal pomijalną emisją cząstek stałych, co było do tej pory jedną z głównych wad silników tego typu zasilanych paliwem konwencjonalnym
9
Selected aspects of use dimethyl ether (DME) in compression ignition engines
Wojs M. K., Orliński P.
Zeszyty Naukowe Instytutu Pojazdów / Politechnika Warszawska
|
2015
|
z. 1/101
103--108
EN
The article presents some aspects of combustion dimethyl ether in compression ignition engines along with the required alterations fuel supply system. It also draws attention to the physicochemical properties of DME as a fuel, particularly its low lubricity which requires the use of additives in order to prevent seizing elements of the fuel pump.
PL
Artykuł przedstawia wybrane aspekty spalania eteru dimetylowego w silniku o zapłonie samoczynnym wraz z wymaganymi przeróbkami układu paliwowego. Zwraca też uwagę na właściwości fizykochemiczne DME jako paliwa, szczególności jego niską smarność co wymaga zastosowania dodatków w celu uniknięcia zatarcia elementów pompy paliwowej.
10
Content available remote Eter dimetylowy : właściwości, technologie produkcji i rynek
Krupa M., Moskalewicz M., Sikora A. P., Szurlej A.
Przemysł Chemiczny
|
2014
|
T. 93, nr 9
1621-1627
PL
W Unii Europejskiej pojawia się miejsce na ciekawe, a dla wielu nowe źródło energii, szczególnie warte rozważenia w okresie budowania nowego wspólnego rynku gazu ziemnego. Przedstawiono właściwości, sposoby otrzymywania i główne uwarunkowania zapotrzebowania na DME, który jest produkowany bądź z metanolu, bądź z gazu ziemnego. Produkcja DME może być szansą do wykorzystania przez krajowych producentów.
EN
A review, with 26 refs., of properties, methods for prodn. and uses (esp. as fuel) of Me2O. Some economic information were also included.
11
Systemy radionawigacji lotniczej
Sadowski J., Stefański J.
Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne
|
2014
|
nr 12
1409--1423
PL
Przedstawiono rozwiązania systemowe estymacji położenia obiektów w naziemnych systemach radionawigacyjnych dla potrzeb lotniczych: ILS, MLS, VOR, ADF, GPS, DME, RA oraz WAM.
EN
In this paper the radionavigation systems for aviation applications, such as ILS, MLS, VOR, ADF, GPS, DME, RA and WAM are presented.
12
Content available Ocena wpływu mieszaniny DME i LPG na osiągi silnika ZI
Flekiewicz M., Fabiś P.
Zeszyty Naukowe. Transport / Politechnika Śląska
|
2013
|
z. 81
31--44
PL
Niniejsze opracowanie jest kontynuacją prowadzonego przez autorów programu badań nad aktywatorami spalania alternatywnych paliw gazowych, wykorzystywanych do napędu pojazdów samochodowych. Zaprezentowano w nim wybrane parametry dynamiczne samochodu napędzanego mieszaniną LPG i eteru dwumetylowego, którego udział masowy zawierał się w zakresie od 5 do 26%. Dla każdej z mieszanin określono również zużycie energii oraz sprawność jej przetworzenia w układzie napędowym badanego pojazdu, napędzanego czterocylindrowym silnikiem o pojemności skokowej 1.6 dm³.
EN
This paper present is continuing of research programme about gaseous fuels combustion activators which are used for vehicle feeding. The article presented chosen vehicle dynamic parameters gained by mixing LPG and DME for range of mixture from 5 up to 30%. The vehicle was powered by 1.6 SI engine adapted to gaseus fuels feeding. The work presents results of used energy and it convert efficiency at the driveline system fitted four cylinders SI engine with 1.6 cm³ capacity.
13
Content available The effects of blending dimethyl ether with LPG on the engine operation and its efficiency
Flekiewicz M., Kubica G.
Combustion Engines
|
2013
|
R. 52, nr 3
86--95
EN
The paper presents a continuation of a research program related to the activators for gaseous fuels used in modern vehicles. Selected vehicle dynamic parameters obtained by the application of a mixture of LPG and DME for the mass share of 0 to 26 % have been presented. The object of the research was a 1.6 SI engine adapted to a combustion of gaseous fuels. The authors present the results of the energy conversion efficiency in a four cylinder SI 1.6 cm3 engine.
PL
Artykuł prezentuje wybrane wyniki badań nad aktywatorami spalania alternatywnych paliw gazowych, wykorzystywanych do napędu pojazdów samochodowych. Określono wpływ udziału DME w mieszaninie DME-LPG na sprawność przetwarzania energii w silniku ZI. Obiektem badań był czterocylindrowy silnik napędzający samochód Opel Astra, wyposażony w dodatkowy układ zasilania, typu PFI. W badaniach wykorzystano mieszaniny DME-LPG o udziale masowym DME od 0 do 26 %. Dla każdej z mieszanin zrealizowano kilka serii pomiarowych, w ustalonych warunkach pracy silnika. Wyjaśniono wpływ udziału DME w mieszaninie na osiągi silnika, a także podstawowe parametry charakteryzujące proces spalania. Stwierdzono, że masowy udział DME nieprzekraczający 11 % wpływa na zwiększenie sprawności przetworzenia energii, przyrost ciśnienia, stopień wypalenia ładunku i ilość wydzielanego ciepła.
14
Content available remote Eter dimetylowy - uniwersalne, ekologiczne paliwo XXI wieku
Górski W.
Nafta-Gaz
|
2012
|
R. 68, nr 9
631-641
PL
W artykule zwrócono uwagę na nowe perspektywy produkcji i stosowania eteru dimetylowego (DME) jako paliwa silnikowego w Polsce. Wynikają one m.in. z zamierzonej eksploatacji gazu ze złóż łupków. Zaprezentowano podstawowe właściwości fizykochemiczne DME i dostępne technologie jego otrzymywania, ze szczególnym uwzględnieniem technologii produkcji z metanu. Omówiono właściwości DME jako paliwa silnikowego oraz wskazano na inne możliwe zastosowania tego związku. Przedstawiono aktualny stan znormalizowania w zakresie DME. Zwrócono uwagę na korzyści dla środowiska naturalnego, wynikające z użytkowania DME jako paliwa. Autorzy postulują podjęcie szeroko zakrojonych badań i działań organizacyjnych, których celem będzie stworzenie warunków technicznych do budowy nowej gałęzi przemysłu paliwowego w Polsce.
EN
Attention was drawn to new perspectives of production and use of dimethylether (DME) in Poland, as a motor fuel. These activities include, but are not limited to, the intended exploitation of shale gas. The basic physical and chemical properties of DME and available technologies to obtain it have been presented, with particular emphasis on production technology from methane as a raw material. Additionally the characteristics of DME as a motor fuel and possible applications of this new fuel were pointed and discussed. Current works on DME standardization and the environmental benefits arising from the its use as a fuel were highlighted and has been presented. The authors recommend taking extensive research and organizational steps aimed at creating the technical conditions for the construction of a new branch of the fuel industry in Poland.
15
Wykorzystanie DME do napędu pojazdów samochodowych. Cz. II
Flekiewicz M.
Czysta Energia
|
2011
|
Nr 2
25-27
16
Content available The future of alternative fuels for internal combustion engines applications
Kolanek C., Reksa M., Walkowiak W., Janicka A.
Journal of Polish CIMAC
|
2010
|
Vol. 5, no 1
77-83
EN
The European Union 2009/28WE directive treating promotion and using of energy from alternative sources assumes that bio-components addition to conventional fuel should account for 7 % for diesel oil and 10 % for petroleum. The aim of this study is finding answer for a question if that numbers are reasonable in aspect of contemporary internal combustion engines operation and development. The problem of alternative fuels application in combustion engines should be discussed in two aspects: adjusting new fuel parameters for engine properties and adjusting an engine to be fuelled with new fuel. Taking into consideration the possible ways of renewable fuels applications it is important to consider costs of the researches of the engines adjustment. The expenditures are reasonable if the alternative fuels supplies will be at the same level as crude oil exploitation these days. The fuel of the future seems to be the hydrogen, fuel for temporary period – natural gas and partly, methane from biomass and dimethylether (DME) as a fuels which can be used in contemporary engine after insignificant modifications.
17
Content available Optimization of injection pressure for fuel consumption and exhaust emissions in a dimethyl ether (DME) engine with a common rail type injection system
Yanai T., Konno M., Sato Y., Oikawa H., Nozaki S.
Journal of KONES
|
2010
|
Vol. 17, No. 2
511-518
18
Content available remote Evidence for methyl nitrite as an exhaust component from engines with certain fuels
Joseph P.M.
Archives of Environmental Protection
|
2008
|
Vol. 34, no. 3
21-31
EN
In some areas of the United States (US), asthma prevalence has reached historically unprecedented highs. Three peer-reviewed studies in New York City found prevalence rates among children from 25% to 39%. That is not true in all places. For example, prevalence in Miami, Florida , was estimated to be only 6-10%. A recent study in major cities in Georgia found only 8.5%. One study in California found asthma prevalence was unrelated to local concentrations of criterion pollutants. In the US, all criterion pollutants, including PM2.5, show a downward trend over the last two decades. These facts argue against any significant influence of criterion pollutants in this crisis.These facts suggest that an unrecognized ambient pollutant may be the cause. One important study in southern California in mid-summer measured pulmonary function in children as it was related to outdoor ozone pollution. They found a negative association: higher levels of ozone were associated with improved respiratory function. We call this a "Paradoxical Ozone Association" (POA). Further evidence for a POA appears in seven other studies in Los Angeles, London, Scotland, and southeastern Canada.One plausible explanation for these observations would be the production of methyl nitrite (MN) as an exhaust product of MTBE in gasoline. Unlike ozone, MN is rapidly destroyed by sunlight. All of the POA studies were done in regions with significant methyl ether in gasoline. This explanation is strengthened by the observation that a POA has not been seen in regions without ether in gasoline.A previous AWMA paper proposed a plausible chemical model predicting that MTBE in gasoline will create MN in the exhaust. MN is highly toxic and closely related alkyl nitrites are known to induce respiratory sensitivity in humans. Funding to measure MN has not been available.
19
Content available remote Development of DME (dimethyl ether) fueled diesel engines for light-duty trucks MEETING 2009 Japan emission regulation
Sato M., Nozaki S.
Journal of KONES
|
2006
|
Vol. 13, No. 2
387-396
EN
DME fuel has been attracting attention as an alternative fuel for diesel engine. DME has a high cetane number and compression ignition capability. This enables a high thermal efficiency comparable to diesel engines. Moreover, DME creates no smoke or sulfur oxide. However, even when using DME, NOx still remain problems under stringent exhaust emission regulations. For severe NOx regulation and develop of alternative fuel for diesel engines, the diesel engines (Isuzu Motors Limited: 4HG1T) fueled with DME for light-duty trucks using a jerk type in-line DME injection system which meet the JAPAN 2009 emissions regulation was developed. Adopting the lower exhaust emission technology, such as a large volume EGR system with air-throttled and inter-cooled turbo-charging, National Traffic Safety and Environment Laboratory and Bosch Corporation has demonstrated the low-emission engines which achieve to reduce NOx emission level by about 50% (0.37 g/kWh) of the 2009 emissions regulation (<0.7 g/kWh) without a NOx reduction catalyst system.
20
Równowagowa konwersja ditlenku węgla w reakcji syntezy metanolu i w bezpośredniej syntezie eteru metylowego w warunkach nieidealnych
Ptaszek A., Grzesik M.
Inżynieria Chemiczna i Procesowa
|
2006
|
T. 27, z. 1
255-263
PL
Produkcja eteru metylowego może się odbywać bezpośrednio z H2, CO2 i CO lub pośrednio z metanolu w wyniku jego dehydratacji. Celem niniejszej pracy jest porównanie równowagowego stopnia przemiany ditlenku węgla w reakcji syntezy metanolu i w bezpośredniej syntezie eteru metylowego w warunkach nieidealnych.
EN
Dimethyl ether (DME) can be produced directly from z H2, CO2 i CO as well as from methanol in methanol dehydration process. The aim of this work was to compare the equilibrium conversion degree of CO2 in methanol synthesis to equilibrium conversion of CO2 in direct synthesis of DME under non-ideal conditions.
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