Temat: Diesel engine - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The total NOx emission control possibility in modern large bore, slow speed marine engines
Autorzy:: Borkowski, T.
Powiązania:: https://bibliotekanauki.pl/articles/246219.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engine
injection assembly
exhaust emission
Opis:: The common demands for environmental protection in shipping are being recognized by IMO, through development of the rules with respect to SOx and NOx. This paper investigates the results of fuel injection variables, affecting cylinder process performance and exhaust gas emission. The effect of injection assembly design attributed on NO emission was estimated. The similar slow speed, large bore MAN B&W engines performance were compared. The main factors used for evaluation were: fuel consumption, rotational speed, mean and maximum in-cylinder pressures and total concentrations of NOx, CO2, O2i CO, and HC. The engines performance and NO emission were compared with conventional 6S60MC-C and latest — electronically controlled 7S60ME-C. The CFD simulation of combustion and pollutant formation was created to represent processes of a marine large bore engine. The SMC-C engine operation and standard injection nozzle design was taken as a baseline for comparison with measured NO concentration. The predicted cylinder pressures showed reasonable agreement with experimental measurements. The predictive ability of used CFD simulation package was found to be quantitatively insufficient in terms of NOx emission. However, the predicted NO emission exhibits similar sensitivity with experiment results. The quantitative set of reference data for the validation of simulation results needs to be substantially improved. The determination offuel injection and cylinder pressure history can be identified as the most important source of inaccuracy. Finally, weighted NOx specific emission factor for both engines shows close value, sufficiently placed against IMO limit presented in Fig. 11. The results are promising and show that controlled combustion process is capable of fulfilling present and future NOx emission requirements. Modern marine engines are designed with adjustable components to allow the engine to be adjusted for maximum efficiency or NOx weighted emission factor when used in particular application.
Źródło:: Journal of KONES; 2008, 15, 2; 21-28
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Assessment of ships engine effective power, fuel consumption and emission using the vessel speed
Autorzy:: Borkowski, T.
Kasyk, L.
Kowalak, P.
Powiązania:: https://bibliotekanauki.pl/articles/247151.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: ships
main propulsion
marine diesel engine
exhaust emission
Opis:: Currently, the Baltic Sea States suggests a proposal to designate the Baltic Sea as an Emission Control Area for nitrogen oxides, in accordance with Annex VI of MARPOL73/78. The emission would be estimated on the data produced by the AIS (Automatic Identification System) system that is compulsory for ships. Therefore, exhaust emission of the ships' can be computed using the actual speed and main propulsion shaft power. Mostly, main propulsion engines' exhaust emission is dependent to realistic performance and can be determined. The research plan has been prepared, aimed an evaluating the main propulsion engine performance and emissions. In cooperation with the ship owner, the experimental program onboard the container vessel, equipped with latest large bore, two-stroke, and slow speed MAN B&W electronic controlled engine was carried out. The records set of vessel speed and related engine shaft power, fuel consumption and exhaust emission for container vessel is formed. Taking into account; main engine performance, types of fuel and other input data, the emission factors were determined for ship sea service state. Main engine shaft power estimation and measurement setup, examples of main engine shaft power, the shaft power equation coefficients density, example of main engine service operation, fuel oil consumption group, the ship speed estimated form, example of main engine area operation influenced by weather conditions are presented in the paper.
Źródło:: Journal of KONES; 2011, 18, 2; 31-39
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Emission inventory of exhaust gases from oil - fired ship boilers
Autorzy:: Myśków, J.
Borkowski, T.
Powiązania:: https://bibliotekanauki.pl/articles/242902.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: ship
oil-fired boiler
marine diesel engine
exhausts emission
Opis:: Regulations concerning the limitation of harmful compounds emission contained in exhaust gases become more restrictive. This is observed within regulations regarding land-based installations and also rules applied to ships of global trade fleet. Other restrictions of vessels emissions, enclosed in rules set out in Annex IV of Marpol Convention 73/78 are gradually implemented and establish emission limits for ship engines. The boiler delivers the heat energy required for fuel preparation for main and auxiliary engines - and also by consuming fuel in its combustion chamber becomes and emitter. This article describes the anticipated methodology of the boiler steam efficiency, depending on the main engine installed. Additionally, fuel oil consumption analysis in various steam capacity range performed using the histograms. The histograms were produced on the basis of service reports of similar units, and combining fuel oil consumption with exhaust emission during operation. A vessel engine report includes monthly machinery abstract and is compiled for a ship-owner on the basis of the log book records. Quantified exhaust emission from auxiliary oil fired boiler contributes determination the overall emissions from a ship.
Źródło:: Journal of KONES; 2012, 19, 4; 487-494
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Marine diesel engine combustion influenced by injection nozzle and primary fuel atomization
Autorzy:: Borkowski, T.
Powiązania:: https://bibliotekanauki.pl/articles/243157.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engine
injection assembly
combustion and injection modelling
Opis:: In recent years modelling has been applied to investigation of mixture formation, fluid flow, combustion process and pollutant formation in diesel engines. In this study numerical simulation was carried out to investigate the effect of fuel spray characteristics in marine medium speed diesel engine - Sulzer 6A20/24D. 1-D and 3-D CFD fuel spray model was adopted for simulation of atomization and combustion process. For comparison purposes modelling outcome was set against experimental tests results. Operational validation of injection assembly model was performed according to standard marine engine test cycles. Injection pressure history for full load range of the engine has been experimentally established. Fuel oil supply system, test engine cylinder experimental setup, 1-D engine fuel injection assembly model and geometry of cam profile, measured nominal injection duration, comparison of calculated and measured injection pressures, calculated nominal injection process components shape, the cross section of velocity flow field for nominal injection phase and for nominal injection phase, the cross sections of velocity flow field in hole channel for nominal injection phase after cut-off and for nominal injection phase after cut-of, the cavitation-induced spray formation process in modelled combustion chamber are presented in the paper.
Źródło:: Journal of KONES; 2007, 14, 2; 45-54
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Combustion pressure appraisal in marine diesel engine
Autorzy:: Borkowski, T.
Kowalak, P.
Marcinek, M.
Bonisławski, M.
Powiązania:: https://bibliotekanauki.pl/articles/247275.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engine
in-cylinder pressure analysis
combustion pressure measurement
Opis:: The practical design of the marine engine multi in-cylinder pressure acquisition system has been presented. The system operational properties and measurement methodology is aimed the online marine diesel engine applications. The design of engine combustion pressure recording system is based on piezoelectric sensors set that comprises quartz pressure element and charge amplifier, mounted on the indicator pipes, equipped with valves. The required crank degree signal is obtained from shaft encoder that is installed on the test bed engine shaft-line (free end of the hydraulic break). The encoder's TDC dedicated reference pulse is able generate simultaneously at the cylinder 1 and 6 in TDC position. The accuracy of the static crankshaft position calibration was evaluated. Additionally, a complex timing system was developed for individual cylinder TDC and crankshaft positioning definition. Before real time data acquisition starts, the number of engine cycles is defined for recording and the first pulse of each crankshaft revolution is used as trigger signal, so that all instantaneous pressure and crank angle signals acquisition can be started at the identical crankshaft position. The method provides required numbers of combustion cycles to be measured for time domain averaging and off line processing.
Źródło:: Journal of KONES; 2011, 18, 4; 25-32
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Vessel main propulsion engine performance evaluation
Autorzy:: Borkowski, T.
Kowalak, P.
Myśków, J.
Powiązania:: https://bibliotekanauki.pl/articles/247310.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: ship main propulsion
marine diesel engine
Energy Efficiency Design Index
Opis:: In general, the performance of a ship in service is different from that obtained on shipyard sea trial. Apart from any differences due to loading conditions, and for which due correction should be made, these differences arise principally from the weather, fouling and surface deterioration of the hull and propeller. The influence of the weather, both in terms of wind and sea conditions, is an extremely important factor in ship performance analysis. Consequently, the weather effects needs to be taken into account if a realistic evaluation is to be made. The primary role of the ship service analysis is a standard of performance data, under varying operational and environmental conditions. The resulting information, derived from this data, becomes the basis for operational and chartering decision. In addition, the part for the data records is to enable the analysis of trends of either the hull or machinery, from which the identification of potential failure scenarios and maintenance decisions can be derived. The traditional method of data collection is the deck and engine room log records, and this is the most commonly used method today. In terms of data processing and capabilities, this method of data collection is far from ultimate, since involves significant data distortion risk. Instrumentation errors are always a potential source of concern in performance analysis methods. Such errors are generally in the form of instrument drift or gross distortion of the reading. However, these can generally be detected by the use of trend analysis techniques. The procedure for the evaluation of the ship's service performance, that relies on proven methods of main propulsion engine service data analysis used and applied for container vessel - small feeder. The vessel is equipped with indirect main propulsion, driven by means of modern medium speed engine. The different approach demonstrated to achieve the reliable and accurate main engine performance. The difference in developed engine power has been found, that corresponds well to registered sea trial results and engine retrofitting reports done, in order to limit the effective power.
Źródło:: Journal of KONES; 2012, 19, 2; 53-60
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: In cylinder pressure assessment from marine diesel engine
Autorzy:: Borkowski, T.
Kowalak, P.
Powiązania:: https://bibliotekanauki.pl/articles/242200.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engine
in-cylinder pressure analysis
combustion pressure measurement
Opis:: This paper explores the feasibility ofusing in-cylinderpressure-based variables in terms of certain class of errors, caused by indirect pressure measurement. Experimental direct in-cylinder measurement pressure setup was constructed, to make comparisons with standard indicator channel and indicator valve design. Zero-dimensional model was used for particular combustion system design. Subsequently, paper describes the application of a zero-dimensional combustion model for pressure signal analysis in cylinder head indicating passage of medium speed marine diesel engine. Recording of engine cylinder pressure development and its qualified evaluation is common aid for maintenance. Especially the outline of experimental test-bed, the injector nozzle equipped with piezoelectric pressure transducer, measurement system specification, B type uncertainty -mean angular speed characteristic, wavelet "denoising" setting and signals comparison, engine cylinder indicator model channel, cylinder pressure traces influenced by engine speed and load, cylinder pressure traces influenced by engine load and speed with two different indicator channel lengths, Indicated engine cylinder power in motoredmode of operation are presented in the paper.
Źródło:: Journal of KONES; 2009, 16, 3; 39-46
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Marine engine exhaust gas emission aftertreatment system concept
Autorzy:: Myśków, J.
Borkowski, T.
Bludszuweit, M.
Frohlingsdorf, W.
Powiązania:: https://bibliotekanauki.pl/articles/247178.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engine
exhaust emission
particulate matter
non-thermal plasma reactor
Opis:: In 2008 the International Maritime Organization - IMO decided to strengthen the requirements for new ships from 2011 - Tier II. However, for Emission Control Areas (ECAs), such as the Baltic Sea, stringent rules will apply from 1 January 2016 for new ships - Tier III. The new standards introduce restrictions on exhaust emissions from diesel engines - NOx and SOx. The paper presents proposal of new design an existing exhaust gas system of experimental marine diesel engine, which is situated in the Laboratory of Maritime Academy in Szczecin. The conception is due to meet to new environmental regulations. Arrangements of exhaust line, CFD model of the SCR reference plant, CFD model - inlet and outlet boundary conditions, pressure loss model for the catalytic elements, simulation results - streamlines, velocity distribution, reaction progress distribution ate presented in the paper as well design description of system of laboratory- 4-stroke and turbocharged engine. . The means of the reduction systems are based on conventional marine exhaust gas installation that includes noise silencer and soot-catcher. The after-treatment methods do not introduce significant changes in engine arrangement and operation. A new gas purifying system should be installed in the engine exhaust gas system.
Źródło:: Journal of KONES; 2011, 18, 4; 307-315
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Direct application of non-thermal plasma to PM reduction from marine diesel engines
Autorzy:: Myśków, J.
Borkowski, T.
Powiązania:: https://bibliotekanauki.pl/articles/242305.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engine
exhaust emission
particulate matter
non-thermal plasma reactor
Opis:: This paper describes the experimental method - using non-thermal plasma reactor to cleaning exhaust gases - focused on PM compound. The demonstrator NTP reactor assembly was built as the by-pass in the real exhaust gas after-treatment system, in marine diesel engine. The reactor used to experiment is called - DBD (dielectric barrier discharge) type, The main aim of investigation was to analyze exhaust gas PM compounds under steady load of the engine. Test bench construction enables direct exhaust stream (main exhaust duet by-pass) to plasma reactor exposure with no additional components (coolers, orifices) that can change the exhaust gas properties. A new monitoring PM analyzing system, which can measure soot and SOF in low mass level, has been engaged. It consist of a diffusion charging (DC) detector with a dilution device for soot measurement, and two differential flame ionization detection (FID) method, which uses two FID detectors with separate sample lines. Exhaust emission reduction strategy for ships, Particulate Matters - PM in exhaust gas, non-thermal plasma reactor, experimental test bed and procedure, an example of reactor power measurement, test results provided into seven stages are presented in the paper.
Źródło:: Journal of KONES; 2009, 16, 2; 361-367
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Marine diesel engine – a novel approach of indicated power determination and related uncertainty level
Autorzy:: Kowalak, P.
Żmudzki, S.
Borkowski, T.
Powiązania:: https://bibliotekanauki.pl/articles/133461.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: marine diesel engine
indicated power
uncertainty
silnik okrętowy
moc indykowana
niepewność
Opis:: A proposal of a new method for marine engine indicated power determination, based on direct piston position, instead of crankshaft angular position measurement, was presented. With the aid of bond graph theory, it was proved, that the new method is equivalent to conventional method. To verify hypothesis, that the new method has potential of determined indicated power uncertainty reduction, simulated calculations were carried out. Results of calculations for two marine diesel engines: medium-speed, four stroke and slowspeed two stroke type, at assumption of engine crankshaft constant speed, were compared with results obtained by a conventional method. Data, collected by means of a typical portable, industrial, digital indicator on engines in service, were used for simulation. The uncertainties of engines indicated power determined by means of two methods were analysed. The indicated power uncertainty, achieved for conventional method, was nearly twice higher than for new proposed method. Finally, uncertainty structure was analysed and evaluated for both: new and conventional method of engine indicated power determination.
Źródło:: Combustion Engines; 2017, 56, 1; 15-20
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Non-thermal plasma reactor use in marine diesel engine exhaust system
Autorzy:: Borkowski, T.
Myśków, J.
Kalisiak, S.
Hołub, M.
Powiązania:: https://bibliotekanauki.pl/articles/248135.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engine
exhaust emission gas treatment
non-thermal plasma reactor
Opis:: Large seagoing vessels are one of the largest pollution sources in the sea environment world. Marine engines operate with extremely low quality fuels contaminated by sulphur and aromatic compounds. Vessels are responsible for an estimated 14 percent total nitrogen oxide emission and 16 percent sulphur oxide, respectively. Nitrogen oxides emissions cause serious problems including acid rain in local areas such as harbours' vicinity. All diesel engine manufacturers have been working on reducing on NOx from ships. This paper describes one of the experimental methods - using non-thermal plasma reactor. NTP reactor was built as the after-treatment module in exhaust gas system in marine diesel engine. Emission measurements were carried out on the engine with and without demonstrator NTP module. The main aim was to analyze exhaust gas compounds during real engine operation, in accordance with test cycles procedureD-2 and E-2 (ISO-8178 rules). The experiment test bench gives the innovative role in the development exhaust gas after-treatment technology for marine systems. One of the most promising methods to decrease the number of toxic compounds from exhaust gas is implementing of NTP reactor as after main treatment module. As the next steps a two-stage plasma-chemical process for the control of harmful compounds: non-thermal plasma reactor and catalyst is proposed. This combination should be more effective and probably gives reduction with more efficiency of harmful exhaust gas compounds.
Źródło:: Journal of KONES; 2008, 15, 3; 37-44
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

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

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Skocz do pozycji: 13.

Tytuł:: „Shore to ship” system - an alternative electric power supply in port
Autorzy:: Borkowski, T.
Tarnapowicz, D.
Powiązania:: https://bibliotekanauki.pl/articles/246496.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: alternative marine power
electric shore-side supply
auxiliary diesel engine
exhaust emission
Opis:: Greater interdependence and integration among the countries worldwide have resulted in the growth of the world trade and, what follows, marine transportation. In the last few years, despite the world economic stagnation, the number of ships has increased. An increase in the marine transportation means greater air pollution caused by ships, what is of paramount importance for the port cities. One of the efficient ways of limiting the negative impact of ships lying in ports on the environment is the power supply from the local electricity stations. This will allow for turning marine power generating systems off, what will result in the emission elimination in the ship’s mooring time along with the decrease of noise and vibrations. The infrastructure of the port electric installation necessary for the ships’ supply has to be designed so as to make the operating of different ship types possible. It is complicated as all over the world ships are equipped with different electric systems. The paper deals with general issues related to common nominal voltages and frequencies for vessels which call in European harbours and their estimated power demands. Additionally, a case study of a ferry vessel, currently undergoing retrofitting for shore connections, is presented and some particulars concerning technical solutions and environmental profits are described.
Źródło:: Journal of KONES; 2012, 19, 3; 49-58
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Energy efficiency design index of container vessel - operational approach
Autorzy:: Borkowski, T.
Kasyk, L.
Kowalak, P.
Powiązania:: https://bibliotekanauki.pl/articles/241715.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: ship
main propulsion
marine diesel engine
Energy Efficiency Design Index
exhaust emission
Opis:: The ship "Energy Efficiency Design Index (EEDI)" has been formulated by the IMO Marine Environment Protection Committee (MEPC) as a measure of the CO2 emission performance of ships. The ship EEDI is calculated based on characteristics of the ship at build, incorporating parameters including ship capacity, engine power and fuel consumption. Shipping is responsible for CO2 discharge of approximately 3.3% global emission and despite being an energy-efficient transport means, compared with other transport modes, there are opportunities for increasing energy efficiency. The EEDI requires a minimum energy efficiency level (CO2 emissions) per capacity mile (e.g. tonne mile) for different ship type and size sectors. With the level being tightened over time, the EEDI will stimulate continued technical development of all the components influencing the energy efficiency of a ship. The paper presents an overview of EEDI calculation method for container vessels and results of experimental approach. The experimental process results through comprehensive analysis of operational data, from modern container vessel, equipped with direct main propulsion unit have been introduced. Ship operators have already been implementing energy efficiency operational measures and set goals for reducing the energy consumption of their fleet. Performance and savings are not always monitored and reported. However, it can be foreseen that such activity when is successfully promoted, reduction of CO2 emissions can be achieved.
Źródło:: Journal of KONES; 2012, 19, 4; 93-100
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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