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Wyszukujesz frazę "low emission" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Experimental study of emission reduction by using alcohol blended fuel for small gasoline engine
Autorzy:
Kawakami, T.
Powiązania:
https://bibliotekanauki.pl/articles/247683.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
low emission
small gasoline engine
alcohol-blended fuel
Opis:
In practical gasoline engines it is necessary to achieve low emissions and low fuel consumptions with high load operation. Several techniques were developed for reducing the emissions and the fuel consumptions from gasoline engines, such as EGR (exhaust gas recirculation) and Ultra lean combustion [1, 2]. Especially, in automotive gasoline engines, low-particulate and low-NOx emissions are very much needed by using alcohol blend fuels and vegetable oil. Nevertheless, there are only few data available for reducing the emissions and fuel consumptions of small gasoline engines by using blended fuels. As the first step in this study, experiments have been carried out to examine the influence of alcohol-blended fuels on combustion characteristics for small gasoline engines. The fuels used in this study are gasoline, methanol, ethanol, propanol and butanol. The addition of alcohol ratio are changed by mixing the volume of alcohol in gasoline and the addition ratios are from 0 to 30 vol% in the fuel. The main conclusions are as follows: 1) The NOx emissions for all the alcohol blend fuels are smaller than that of gasoline. 2) The heat release rate increases with addition of alcohol fuel under higher load conditions for small gasoline engines.
Źródło:
Journal of KONES; 2015, 22, 2; 115-120
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study of emission reduction by using alcohol blend fuel for small diesel engine
Autorzy:
Kawakami, T.
Powiązania:
https://bibliotekanauki.pl/articles/244564.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
low emission
small diesel engine
alcohol blend fuel
Opis:
In practical diesel engines it is to achieve a low emission and low fuel consumption under from low to high load operation conditions. Several techniques were developed for the low emission and high efficiency, such as Homogeneous Charge Compression-Ignition Engines and the blend fuels. Nevertheless, there are only few data available for reducing the emissions and fuel consumption of small diesel engines by using blend fuels. This experiment has been carried out to examine the influence of alcohol blend fuels on combustion characteristics for small diesel engine. The fuels used in this study are light oil (Standard), ethanol, propanol and butanol. The combustion behaviours, such as the emissions in exhaust gas (NOX, CO, CO2, O2 concentration), fuel consumption rate are observed. The main conclusions are as follows: 1) it is possible to control the combustion behaviour by using alcohol blend fuels for small diesel engine, 2) the fuel consumption of at any alcohol blend fuels is bigger than that of light oil, 3) the net thermal efficiency of some alcohol blend fuels (E5P5, P5B5, E5B5) slightly increases than that of light oil, 4) the NOx emissions for all the alcohol blend fuels are smaller than that of light oil, 5) the CO emissions are remarkably bigger than that of light oil under from low to middle engine load without the ethanol 10% addition.
Źródło:
Journal of KONES; 2014, 21, 1; 125-130
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of low temperature plasma nox control system for marine diesel engine
Autorzy:
Borkowski, T.
Myśków, J.
Hołub, M.
Kalisiak, S.
Powiązania:
https://bibliotekanauki.pl/articles/243384.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
marine diesel engine
exhaust emission gas treatment
low temperature plasma reactor
Opis:
The control of nox emissions from marine engines proves a challenge. Diesel engine manufacturers have been investigating a variety of methods with aim of reducing nox emissions. Currently, the plasma technology is undergoing rapid development in application to diesel engine exhausts. A combination of non-thermal plasma with catalysts can be referred to plasma assisted catalysts technology. This paper briefly describes research efforts aimed at non-thermal plasma reactor development for ship use with primary focus on NO oxidation condition. The part scale plasma reactor models have been designed and manufactured for the purpose of this trial. Exhaust emission plasma after-treatment module was fitted on exhaust outlet path of the marine test bed engine for fractional exhaust gas stream examination. Subsequently, the comprehensive series of trials were performed to assess the exhaust flow properties of the main exhaust channel and plasma reactor by-pass duct. Emission measurements were carried out on engine at steady-state operation. The NO reaction activity was a major task of the experiment and throughout the measurements, the engine outlet nox levels (NO and NO2) were monitored with simultaneous NO, NO2, N2O level recording after NTP reactor.
Źródło:
Journal of KONES; 2007, 14, 3; 91-99
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The possibility of modifying the lubricity of transmission oils in industrial gears
Autorzy:
Landowski, B.
Sójka, M.
Muślewski, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/246291.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
lubricating oil
gear box
friction
lubrication
boundary layer
low friction additives
acoustic emission
Opis:
The study deals with the issue of durability extension of multi-phase gears working under temporary or constant loading. The tests were performed for transmission oils used in power transmission systems of beet washers of DC type used in sugar plants. The lubricity parameters of oils and the possibilities of their modification through introduction of low-friction additives to the oil were studied. Additionally, the noise level emitted by working gears was measured before and after addition of the modifier. Lubricity tests were performed on semi-Timken apparatus, on which friction pairs friction roller- roller were tested with the use of oils extracted from the gear. SoundMeter application with MIC002 microphone adaptor was used for measurement of the noise level emission. Tests results have confirmed efficiency of the modifiers as higher values of friction loading were obtained and the noise emission level was reduced. It has been proven that in real operation systems, there is a possibility to increase the value of transmission oil lubricity parameters, which has a direct impact on durability of friction pairs of a gear during its operation.
Źródło:
Journal of KONES; 2018, 25, 4; 231-237
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A proposal for marine fuel oil system arranged to burn heavy fuel oil and low sulphur distillate grade
Autorzy:
Krzyżanowski, J.
Nowak, P.
Powiązania:
https://bibliotekanauki.pl/articles/243358.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
automatic fuel change-over
chiller
Diesel Switch
Emission Control Areas
low-sulphur fuel
Opis:
The following paper introduces a retrofit proposal for marine fuel oil system arranged to burn heavy fuel oil and low-sulphur distillate grade. In the face of tighter requirements regarding sulphur content in fuel, which are obligatory both inside Emission Control Areas and among international waters, it is necessary to provide safe and efficient ship operation. Conventional methods for fuel change-over between heavy fuel oil and distillate grade are saddled with necessity of constant process control and compulsory engine load reduction during the realization of procedure. It ensures that maximum fuel temperature gradient amounts 2 °C/min, which protects injection system against thermal shock. The solution proposed by MAN Diesel & Turbo in cooperation with LEMAG Lehman & Michels turns mentioned procedure into unusual until now level thanks to guaranteed safety, control, smoothness and degree of automation. So-called Diesel Switch constitutes automatic fuel change-over system, which implements the process free from engine load factor. A built-in programmable logic controller and specially designed nonproportional valve enable to achieve smooth and linear characteristic of change. Furthermore, device controls other fuel oil system elements and also registers procedure run. The second element in retrofitted system concerns the way of distillate fuel cooling. Sulphur in the chemical bonds with other fuel components reveals lubricating properties. Reduction of its amount simultaneously with usage of low-viscosity distillate fuel creates a risk of damage to plunger and barrel assemblies. A guarantee of proper hydrodynamic lubrication film in injection system involves maintaining a minimal fuel viscosity of 2 cSt at engine inlet. Commonly used central cooling system on ships has a significant limitation. Water from low temperature cooling circuit, which provides a coolant cannot decrease fuel temperature below 40 °C. Applied solution proposed by Novenco is concerned with chilled water system assembly, which can cool down fuel even below 0 °C through vapour compression or an absorption cycle. As a result, low-sulphur fuel viscosity can be increased at any load independently of seawater temperature.
Źródło:
Journal of KONES; 2014, 21, 2; 161-168
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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