Wyniki wyszukiwania - Biblioteka Nauki

1

Wykorzystanie DME do napędu pojazdów samochodowych. Cz. II

100%

Flekiewicz M.

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tom Nr 2

25-27

2

Eter dimetylowy : właściwości, technologie produkcji i rynek

89%

Krupa M. , Moskalewicz M. , Sikora A. P. , Szurlej A.

Przemysł Chemiczny

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2014

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tom 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.

3

Development of DME (dimethyl ether) fueled diesel engines for light-duty trucks MEETING 2009 Japan emission regulation

75%

Sato M. , Nozaki S.

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tom 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.

4

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

75%

Stepanenko D. , Rudnicki J. , Kneba Z.

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tom 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

5

Optimization of injection pressure for fuel consumption and exhaust emissions in a dimethyl ether (DME) engine with a common rail type injection system

75%

Yanai T. , Konno M. , Sato Y. , Oikawa H. , Nozaki S.

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tom Vol. 17, No. 2

511-518

6

Symulacja działania systemu DME

71%

Dołęga B.

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2004

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tom z. 63 [213], t.2

441--448

PL

W referacie przedstawiono założenia oraz podstawowe rozwiązania modułu symulacji działania systemu DME (ang. Distance Measuring System). Opracowanie jest częścią europejskiego projektu dotyczącego syntezy sterowania samolotem lokalnej komunikacji (ADFCS II - Affordable Digital Flight Control System). Układ zrealizowano w środowisku pakietu MATLAB/Simulink® oraz zweryfikowano przy użyciu badawczego symulatora lotu.

EN

The main project foundation and basic concepts of Distance Measuring System Simulation Module are presented in this paper. This work is a part of the project of ADFCS II (Affordable Digital Flight Control System), sponsored by European Union. It concerned of synthesis of the lateral motion control part. All parts were designed using MATLAB/Simulink® form and verified on the research flight simulator.

7

Evidence for methyl nitrite as an exhaust component from engines with certain fuels

44%

Joseph P. M.

Archives of Environmental Protection

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2008

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tom 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.