Skocz do pozycji: 1.

Tytuł:

Analysis of application of chosen methods for tdc determination in marine diesel engines

Autorzy:

Łutowicz, M.

Powiązania:

https://bibliotekanauki.pl/articles/245396.pdf

Data publikacji:

2009

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

diesel engine
transport
marine diesel engine
indication
TDC

Opis:

In the operating marine diesel engines the indication diagnostics tests are usually performed through a 0.5-1.0 me ter long indication channel which delays and disfigures the pressure signal being measured. the delay depends on the engine 's speed and load. the pressure sensor itself together with an amplifler is an additional source of delay and disfigurements, so the registered pressure curve is displaced even if theTDC piston's position hadbeen estimated with the highest accuracy. when the over exploited engine is being tested the angle of delay can achieve several degrees and differ for each cylinder. in that case cylinders' load is unequal and torsional vibrations occur in the engine operation. in case when some simplifying assumptions have been adopted the part of diagnostic information is lost what could lead to a false diagnosis. in the paper the attention is focused on the mistakes which could be made in the marine diesel engine diagnostics when different TDC assessment methods are used. TDC corrections with compression pressure analysis are possible only in case when crankshaft angle position is precise. in case of measurement with constant frequency such corrections are possible only when the engine is good balanced.

Źródło:

Journal of KONES; 2009, 16, 4; 301-306
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 2.

Tytuł:

Vibro-acoustic methods in marine diesel engines diagnostics

Autorzy:

Lus, T.

Powiązania:

https://bibliotekanauki.pl/articles/245521.pdf

Data publikacji:

2011

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

marine diesel engine
turbocharger
diagnostics
vibration

Opis:

Vibro-acoustic diagnostic methods which are used on marine high-speed diesel engines with turbochargers are presented in this paper. Vibration and acoustic signals generated by turbochargers need different signal processing methods to be effective and faultless in turbochargers diagnostics. Diagnostic methods which based on vibration and acoustic signals analysis are sensitive on engine load and speed changes. Methods presented in this paper based on vibration and acoustic signals processing in time and frequency domain. Using this methods checking technical condition of the turbochargers and its rotors and bearings without stopping the engine and dismantling it is possible. Examples of radial-flow rotor turbine overgrown by carbon soot and axial-flow rotor turbine without turbine blades, sound intensity level of turbocharger and acoustic spectrum of turbocharger in octave mode acoustic spectrum of turbocharger in octave mode for two different technical conditions, acoustic and vibration signal spectrum of the turbocharger, vibration acceleration amplitude of first harmonic for three turbochargers, values of harmonic vibrations of accelerations equivalent of turbine blades number, amplitude of vibrations accelerations in frequency domain for turbocharger in good and bad technical conditions are presented in the paper.

Źródło:

Journal of KONES; 2011, 18, 3; 203-210
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 3.

Tytuł:

Marine diesel engine valve gear mechanism diagnostics problems

Autorzy:

Lus, T.

Powiązania:

https://bibliotekanauki.pl/articles/245681.pdf

Data publikacji:

2009

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

marine diesel engine
diagnostics
valve gear

Opis:

Marine diesel engines have changed their construction last years because of electronic control implementation in fuelling process. Electronic control implementation could be also important in valve gear mechanism which is main part of the engine gas es exchange system. In this paper problems connected with of valve gear mechanisms operation and diagnostics have been presented. the diagnostic methods and processes which could impact diagnostic process will be shown together with examples from test bed and real vessels. diagnostic methods which based on vibration signals analysis are sensitive on engine load and speed change. separate engine cylinder 's loads generale differences in so called "dynamic valve gear diagrams " which will be shown for some marine engine types. opening and closing of inlet and exhaust valves generale vibration signals in entire engine structure. There are some tools available in signal analysis which gives opportunity to trace changes in signal patterns in real time monitoring systems. special diagnostic method based on vibration signal analysis worked out in the polish naval academy, gives opportunity to change engine maintenance philosophy from scheduled planed maintenance system to condition based maintenance system without fear about real operating engine conditions.

Źródło:

Journal of KONES; 2009, 16, 4; 287-292
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 4.

Tytuł:

Asymmetry increase in the course of compression pressure as a measure of obstruction in indicating channel

Autorzy:

Łutowicz, M.

Powiązania:

https://bibliotekanauki.pl/articles/242408.pdf

Data publikacji:

2016

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

marine diesel engine
indicated
indicated channel
diagnostics

Opis:

Indicating process of large combustion engines for both marine and industrial applications is performed using the indicating channels with valves. The impact of these channels on the values of parameters obtained from engine’s indication is significant. In previous studies, it had been shown that during exploitation accidental degradation of the indicating channels occurs. Carbon deposits, which appear in the channels, are limiting their patency. Leaks in channels connections are also appeared. Disregarded state of degradation of indicating channels will change the image of indicated pressure course, different for each cylinder of the engine. When cylinders are indicated using commercial instruments, the status of the channel is not in any way taken into account. At one gas compressing station in Poland, which has compressor diagnostic system, developed by the author, with stationary indicator, inverted IIR filter has been used. This filter is used to adjust the recorded waveforms of indicated pressure on motor-compressors GMVH type, and the filter coefficient is chosen to offset the associated throttling signal delay. Information about the delay of the signal is missing, however, in the case of popular portable indicators that do not use tags from crankshaft position. The paper presents a method for assessing the state of the indicating channel, based on the asymmetry measurement of compression course obtained after cut-off the fuel supply to the tested cylinder. The study model shows that leakage from the combustion chamber, interference in cooling and other defects cause only slight and predictable disruption of symmetry. The analysis of compression pressure course (without fuel delivery) immediately prior to each cylinder indication, in the case of positive verification, increases the reliability of diagnosis. In the case of negative verification, measure of the asymmetry could be the basis for the adjustment of acquired pressure waveforms and achieved from them parameters.

Źródło:

Journal of KONES; 2016, 23, 3; 311-316
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 5.

Tytuł:

Reverse IIR filter as a tool for cylinder indicating channel patency impact correction on measured cylinder pressure waveform

Autorzy:

Łutowicz, M.

Powiązania:

https://bibliotekanauki.pl/articles/242647.pdf

Data publikacji:

2013

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

marine diesel engine
indicated
diagnostics
indicated channel

Opis:

Indicating of large marine and industrial diesel engines is made with using indicating channels in cylinder head with valves. The impact of these channels on the value of the parameters obtained from indicating is significant. However, indicating is commonly used for comparative tests assuming that this error is the same on all cylinders of the same engine in identical conditions. As a result of operation especially in cylinders with irregular combustion process the coke occurs in the channel limits its patency. It causes changes in the image of indicated pressure. In such a situation defined parameters are subject of considerable random error. In the earlier studies on the engine Sulzer type 6AL20/24 cylinder channel failure was simulated and channel chocking symptom was observed as apparent TDC shift relative to a reference mark connected with the shaft. As part of ongoing studies attempt to reconstruct distorted pressure curve by chocked indicating channel was made. It is assumed that the channel with the valve is only connection between throttling element in the form of a channel with the much greater volume of the valve. Such a structure was modeled as IIR filter. For this type of filter, there is an unequivocal inverse transformation, which, at least in theory gives possibility to reconstruct the distorted pressure waveform. The reconstruction was carried out by selection of the filter coefficients so as to eliminate the shift of TDC. In practice it turned out that the reconstruction is not perfect. All obtained pressure waveforms are slightly noisy and distorted in the first phase of expansion. Despite this, there was a significant reduction in errors of some parameters determined from the reconstructed pressure waveform.

Źródło:

Journal of KONES; 2013, 20, 2; 253-259
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 6.

Tytuł:

The influence of oil refilling strategy on the amount of oil in trunk piston marine diesel engine lubricating system

Autorzy:

Młynarczak, A.

Powiązania:

https://bibliotekanauki.pl/articles/246111.pdf

Data publikacji:

2011

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

marine diesel engine
lube oil
refilling strategy

Opis:

The issues connected with the amount of lube oil in engine oil system are real problems in marine diesel engines maintenance process. The amount of lube oil in circulation influences its quality and consequently the wear of lubricated parts. That amount still changes and is connected with lubricating oil refilling strategy. The results of simulation carried out for SULZER 8S20U and PIELSTICK 12PC2-5V engines allowed to determine the influence of lubricating oil refilling strategy on the amount of lube oil in circulation. Frequent topping-up at regular intervals can be arranged to maintain the sump working capacity at the chosen percentage of the design maximum (for example 90 per cent), while a significantly delayed topping-up might allow the working capacity to be reduced to as low as about 50 per cent of the maximum. Thus a significantly reduced lubricant amount may have a disadvantageous influence on engine elements wear (i.e. piston rings, cylinder liners) and consequently cause the growth of the engine overhaul costs, although in far perspective, it would be difficult to connect that fact with the amount of oil in circulation. On the other hand in small output trunk piston engines without sump tanks, delayed topping-up and operation with minimum oil level could give some economic and ecological advantages resulting from reduced oil consumption. But in marine conditions (rolling and trim changes) it would be very hazardous for the engine safety operation.

Źródło:

Journal of KONES; 2011, 18, 3; 287-291
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 7.

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

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 8.

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

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 9.

Tytuł:

Validation of reference sampling for failure detection by crankshaft angular speed analysis

Autorzy:

Dereszewski, M.
Charchalis, A.

Powiązania:

https://bibliotekanauki.pl/articles/243825.pdf

Data publikacji:

2014

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

diagnostics
marine diesel engine
angular speed
reference comparison

Opis:

The paper presents results of the experiment focused on evaluation of records of runs of the engine in good condition as a reference for subsequent detection of faults of fuel system of medium speed diesel engine. The aim of research was determination of limits of instantaneous angular speed's spread spotted between random starts of the engine, without any fault condition simulation. Due to fine variation of the load setup and different ambient condition, every record of angular speed of independent starting, despite of attempts to sustain the same load and rotational speed value, presents some deviations between runs. Having on mind utilization of such measurement as a template for further comparison, is crucial to find out how random changes of ambient conditions and accuracy of revolutionary speed setup affect the IAS magnitude course. The answer was got in way of registration of numerous runs of the test engine after independent starts and hand adjustment of required RPM’s. The experiment was carried out at laboratory stand in GdyniaMaritimeUniversity, equipped with diesel engine Sulzer 3AL 25/30 driving electrogenerator. Sulzer 3AL 25/30 is three cylinder, medium speed, four stroke marine diesel engine, with maximum output 400 kW at 750 rpm. Independent records were treated as random variable and were compared each other. Obtained results were compared with differences between healthy engine and with simulated malfunctions of fuel injection.

Źródło:

Journal of KONES; 2014, 21, 4; 63-70
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 10.

Tytuł:

Experimental study of fuel combustion and emission characteristics of marine diesel engines using advanced fuels

Autorzy:

Changxiong, Li
Hu, Yihuai
Yang, Zy
Guo, Hao

Powiązania:

https://bibliotekanauki.pl/articles/34615637.pdf

Data publikacji:

2023

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

marine diesel engine
PODE
combustion characteristics
emission performance

Opis:

In order to explore the potential application of oxygenated fuels, polyoxymethylene dimethyl ethers (PODE), as an alternative fuel for marine diesel engines, the fuel combustion performance and gas emission characteristics of pure diesel oil, diesel-blended PODE, and pure PODE were tested on a marine diesel engine under different running conditions. The experimental results indicate that oxygen consumption can be reduced by diesel-blended PODE and pure PODE. The in-cylinder pressure and exothermic curve were consistent with the trend of diesel oil. Also, the ignition delay of diesel-blended PODE and pure PODE decreased, and the diffusion rate was accelerated, which helped to improve the combustion performance of diesel engines. Diesel blended PODE and pure PODE reduced the particulate matter (PM) emissions by up to 56.9% and 86.8%, respectively, and CO emissions by up to 51.1% and 56.3%, respectively. NOx emissions were gradually decreased with engine load. CO2 emissions were slightly increased, and the effective fuel consumption was increased up to 48% and 132%, respectively. It was shown that PODE could provide comparable power in a marine diesel engine and improve the fuel combustion and gas emission of the engine as a clean alternative fuel for marine diesel engines.

Źródło:

Polish Maritime Research; 2023, 3; 48-58
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 11.

Tytuł:

Possibility of using visualization to present running point of marine diesel engine

Autorzy:

Krzyżanowski, J.
Witkowski, K.

Powiązania:

https://bibliotekanauki.pl/articles/246958.pdf

Data publikacji:

2010

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

monitoring
marine diesel engine
torque
field of work engine

Opis:

The following paper introduces us to possibility of using visualization to present running point of main marine diesel engine during ship operation. Construction development of ship marine diesel engine going towards more and more power results in large mechanical and thermal load. So ship marine diesel engines of new generation are more susceptible to damage caused by overloading than the ones of older generation. For this reason more and more attention is paid to proper operation of these main marine engines understood as the way of choosing the right parameters resulting in adequate point of engine operation. This kind of exploitation is being reflected in more and more rigorous requirements imposed by ship engine producers concerning the conditions of their exploitation. This paper presents measured parameters during engine operation and of the sometime confirming its current performance. Special attention has been paid to the measurement of torque. Measurement of torque and revolution speed of the main marine diesel engine have been linked with the possibility of visual presentation of running point of the engine. By means of research carried out of HCP Engine Test Bed it was possible to prove effectiveness of succession of measurement instruments and torque meter action. Visualization algorithm which can be used to present field of work and running point of the engine has also been tested.

Źródło:

Journal of KONES; 2010, 17, 2; 271-275
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 12.

Tytuł:

Validation of reference sampling for failure detection by crankshaft angular speed analysis

Autorzy:

Dereszewski, M.
Charchalis, A.

Powiązania:

https://bibliotekanauki.pl/articles/247164.pdf

Data publikacji:

2014

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

diagnostics
marine diesel engine
angular speed
reference comparison

Opis:

The paper presents results of the experiment focused on evaluation of records of runs of the engine in good condition as a reference for subsequent detection of faults of fuel system of medium speed diesel engine. The aim of research was determination of limits of instantaneous angular speed's spread spotted between random starts of the engine, without any fault condition simulation. Due to fine variation of the load setup and different ambient condition, every record of angular speed of independent starting, despite of attempts to sustain the same load and rotational speed value, presents some deviations between runs. Having on mind utilization of such measurement as a template for further comparison, is crucial to find out how random changes of ambient conditions and accuracy of revolutionary speed setup affect the IAS magnitude course. The answer was got in way of registration of numerous runs of the test engine after independent starts and hand adjustment of required RPM’s. The experiment was carried out at laboratory stand in Gdynia Maritime University, equipped with diesel engine Sulzer 3AL 25/30 driving electrogenerator. Sulzer 3AL 25/30 is three cylinder, medium speed, four stroke marine diesel engine, with maximum output 400 kW at 750 rpm. Independent records were treated as random variable and were compared each other. Obtained results were compared with differences between healthy engine and with simulated malfunctions of fuel injection.

Źródło:

Journal of KONES; 2014, 21, 3; 67-74
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 13.

Tytuł:

Digital Twin test-bench Performance for marine diesel engine applications

Autorzy:

Minchev, Dmytro
Varbanets, Roman
Shumylo, Oleksandr
Zalozh, Vitalii
Aleksandrovska, Nadiia
Bratchenko, Pavlo
Truong, Thanh Hai

Powiązania:

https://bibliotekanauki.pl/articles/34604685.pdf

Data publikacji:

2023

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

digital twin
combustion model
marine diesel engine
diagnostics

Opis:

The application of Digital Twins is a promising solution for enhancing the efficiency of marine power plant operation, particularly their important components – marine internal combustion engines (ICE). This work presents the concept of applying a Performance Digital Twin for monitoring the technical condition and diagnosing malfunctions of marine ICE, along with its implementation on an experimental test-bench, based on a marine diesel-generator. The main principles of implementing this concept involve data transmission technologies, from the sensors installed on the engine to a server. The Digital Twin, also operating on the server, is used to automatically process the acquired experimental data, accumulate statistics, determine the current technical state of the engine, identify possible malfunctions, and make decisions regarding changes in operating programs. The core element of the Digital Twin is a mathematical model of the marine diesel engine’s operating cycle. In its development, significant attention was devoted to refining the fuel combustion model, as the combustion processes significantly impact both the engine’s fuel efficiency and the level of toxic emissions of exhaust gases. The enhanced model differs from the base model, by considering the variable value of the average droplets’ diameter during fuel injection. This influence on fuel vapourisation, combustion, and the formation of toxic components is substantial, as shown. Using the example of calibrating the model to the test results of a diesel engine under 27 operating modes, it is demonstrated that the application of the improved combustion model allows better adjustment of the Digital Twin to experimental data, thus achieving a more accurate correspondence to a real engine.

Źródło:

Polish Maritime Research; 2023, 4; 81-91
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 14.

Tytuł:

The analysis of influence of fuel spray angle on NOx fraction in the exhaust gas from marine 4-stroke diesel engine

Autorzy:

Kowalski, J.

Powiązania:

https://bibliotekanauki.pl/articles/246120.pdf

Data publikacji:

2015

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

marine diesel engine
NOx fraction
spray angle
CFD model

Opis:

The manuscript presents the analysis of influence of fuel spray angle on NOx fraction in the exhaust gas emitted from marine 4-stroke diesel engine. Analysis is based on computational fluid dynamic (CFD) model designed because of the motion mesh of combustion chamber of the marine engine cylinder and air inlet and exhaust gas ducts. Presented model consists of models of fuel injection into combustion chamber, breaking-up and evaporation of the fuel, mixing with air and turbulent combustion with heat transfer to construction elements of the engine cylinder. Mentioned CFD model is validated according to boundary and initial conditions taken from direct measurements. The chosen research object is laboratory 4-stroke turbocharged Diesel engine with direct injection of the fuel and mechanically controlled of both cylinder valves and the injector. The conclusion from the analysis is that the increase of fuel spray angle causes the increase of maximum speed of kinetic phase of the combustion and the decrease of maximum speed of diffusion phase of the combustion. The effect of this is the increase of maximum combustion pressure and the decrease of maximum combustion temperature. The result of presented changes in combustion process is the increase of NOx fraction in the exhaust gas. It should be noted that extended increase of the fuel spray angle cause close-up the fuel spray to the cylinder heads wall and the decrease of NOx fraction in the exhaust gas.

Źródło:

Journal of KONES; 2015, 22, 3; 309-316
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 15.

Tytuł:

Tuning method for high-speed marine diesel engine MB820 Type

Autorzy:

Lus, T.

Powiązania:

https://bibliotekanauki.pl/articles/246964.pdf

Data publikacji:

2010

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

marine diesel engine
diagnostics
tuning
fuel injector
valve gear

Opis:

Checking and tuning of the fuel injection valves opening pressures, fuel valves timing and exhaust or inlet valves clearances is a common practice in high-speed marine diesel engines maintenance. Cost lowering tendency in engine maintenance schedules and unmanned vessel's propulsion plants need new approach to these old and reliable procedures. Conventional maintenance methods for engine valve gear mechanism depend on valve clearances checks between valve stem and rocker arm and valve timing diagram checks on crankshaft flywheel. But how to observe valves' timing diagram on working engine and what is the difference between static and dynamic valves timing diagram and in the end how engine load and speed changes disturb observed parameters? Answers for these and other questions for high-speed marine diesel engines MB820 type are given in this paper. Dynamic valve gear timing diagrams are indispensable to perform an accurate engine tuning. A new original diagnostic and tuning method for high-speed marine diesel engine MB820 is presented in the paper. In the principle this method based on measurements of: internal cylinder pressure curves and on vibration signals. Typical diagnostic methods which based on vibration signals analysis are sensitive to engine load and speed changes. Researches presented in this paper were focused on the possibilities and differences of the dynamic timing diagram assessing at engine rated load and when idling.

Źródło:

Journal of KONES; 2010, 17, 2; 277-284
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 16.

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

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 17.

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

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 18.

Tytuł:

Study on optimization simulation of SCR denitration system for marine diesel engine

Autorzy:

Du, J.
Li, R. N.
Wu, X.
Zhang, Y.

Powiązania:

https://bibliotekanauki.pl/articles/259646.pdf

Data publikacji:

2018

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

marine diesel engine
SCR system
flue gas
flow deflector

Opis:

With the rapid development of shipbuilding industry exhaust world is also very harmful one kind of environmental issues, and the ship marine diesel engine exhaust gas is mainly produced, so in recent years it has developed a diesel engine SCR system. SCR system can control emissions of nitrogen oxides in the exhaust of vessel, furthermore air pollution can be reduced. The main goal of article was using fluent software to correct SCR system selection and flue gas flow under different size best deflector arrangement is simulated. Next goal is further optimize the structure of the SCR system.

Źródło:

Polish Maritime Research; 2018, S 3; 13-21
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 19.

Tytuł:

Application of the pressure process detector for diagnosing injection apparatus in marine diesel engines in the injection pipe
Zastosowanie detektora przebiegu ciśnienia w przewodzie wtryskowym do diagnozowania aparatury wtryskowej silników okrętowych

Autorzy:

Monieta, J.
Kroczyński, K.

Powiązania:

https://bibliotekanauki.pl/articles/327272.pdf

Data publikacji:

2009

Wydawca:

Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN

Tematy:

silnik okrętowy
wtryskiwacz
diagnozowanie
marine diesel engine
injector
diagnosis

Opis:

The paper includes results of the preliminary research of the application of the pressure process detector for diagnosing injection apparatus in marine diesel engines in the injection channel during exploitation without its dismantling. The research was conducted on the marine auxiliary engine and on injection analysis probe for shipping engines, which are situated in the Laboratory of the Ship Power Plant at Maritime Academy of Szczecin. The aim of the research was to select symptoms of the fuel vibration signal in the fuel channel with the use of the pressure detector in a way that the signal is the reflection of the technical condition of the injection apparatus.
Referat zawiera wyniki badań wstępnych zastosowania detektora przebiegu ciśnienia w przewodzie wtryskowym do diagnozowania aparatury wtryskowej silników okrętowych w czasie eksploatacji bez jej demontażu. Badania zostały przeprowadzone dla okrętowego silnika pomocniczego, oraz wykorzystaniem próbnika do badań wtryskiwaczy silników okrętowych, znajdującym się w Laboratorium Siłowni Okrętowych Akademii Morskiej w Szczecinie. Celem było wyselekcjonowanie symptomu sygnału drgań paliwa w przewodzie paliwowym za pomocą czujnika ciśnienia tak, by był on odzwierciedleniem stanu technicznego aparatury wtryskowej. Badania wykazały, że niektóre parametry zarejestrowanych drgań w przewodzie wtryskowym mogą służyć do oceny stanu technicznego aparatury wtryskowej.

Źródło:

Diagnostyka; 2009, 4(52); 51-54
1641-6414
2449-5220

Pojawia się w:

Diagnostyka

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 20.

Tytuł:

Model based prediction of the crankshaft instantaneous angular speed fluctuations

Autorzy:

Dereszewski, M.
Charchalis, A.

Powiązania:

https://bibliotekanauki.pl/articles/247114.pdf

Data publikacji:

2013

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

diagnostics
marine diesel engine
angular speed modeling
failure symptoms

Opis:

The paper presents results of the calculation, based on simplified engine model, aimed on prediction of IAS (Instantaneous Angular Speed) of the crankshaft fluctuations under faulty engine condition. Gas forces were calculated basing on results of in-cylinder pressure measurements which were used as inputs to the dynamic model. Mass forces were calculated basing on technical particulars of the engine Sulzer 3Al 25/30.Measurements of the incylinder pressure was carried out at laboratory stand in Gdynia Maritime University, equipped with diesel engine Sulzer 3AL 25/30 driving electro-generator. Sulzer 3AL 25/30 is three cylinder, medium speed, four stroke marine diesel engine, with maximum output 408 kW at 750 rpm. In order to evaluate of IAS model utility for diagnostic prediction of the engine behavior, two kinds of malfunctions of engine’s fuel system were simulated. First malfunction was fuel leakage from high pressure line; the second was partly plugged injector’s nozzle. Construction of high pressure fuel pump enable to fuel leakage simulation. The engine was run out at load 250 kW what is around 65% of nominal. Results of all measurement were smoothed in order to eliminate a noise using SG (Savitzky – Golay) filter. Results of fault condition modeling were compared with healthy engine model and with results of in -cylinder pressure diagrams, in order to create a map of deviations from normal condition.

Źródło:

Journal of KONES; 2013, 20, 1; 55-61
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 21.

Tytuł:

Evaluation of lubricating properties of titan truck plus 15W40 oil used in marine diesel engines

Autorzy:

Młynarczak, A.

Powiązania:

https://bibliotekanauki.pl/articles/241944.pdf

Data publikacji:

2014

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

marine diesel engine
lubricating oil
lubricating properties
oil deterioration

Opis:

The paper presents the results of lubricating properties tests of Titan Truck Plus 15W40 motor oil. Tested oil was used in Caterpillar 3512B high-speed engines, which propelled the tug boat. The lubricating properties parameters were determined for fresh oil and used oil samples. Builder of Caterpillar 3512B engine recommends lubricating oil change after every 1000 hours of operation. Lubricating oil samples were taken from engine oil system after 342 hours of service and after 1024 hours of service, it means just before lubricating oil change. The test results were collected by means of a four-ball extreme pressure tester T-02 according to Polish Norm PN-76/C-04147. The following lubricating properties parameters were determined: weld load Pz, maximum nonseizure load Pn, seizure load Pt and load wear index Ih. Investigations showed that for used oil samples maximum nonseizure load and seizure load increase but weld load and load wear index decrease. These results indicate that used oil has higher boundary layer resistance (better antiwear properties) but worse antiseizure properties, which are determined in hard working conditions of the sliding node elements. In author’s opinion, worsening of the antiseizure properties results of solid impurities presence, which come from lubricating oil deterioration process. To verify that thesis the detail analysis of the tested oils chemical content has been made. Spectrol Q100 spectrometer, which can specify content of 24 chemical elements in the lubricating oils was used for this purpose.

Źródło:

Journal of KONES; 2014, 21, 1; 163-168
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 22.

Tytuł:

Influence of clogged injector nozzles on the heat release characteristics

Autorzy:

Pawletko, R.
Polanowski, S.

Powiązania:

https://bibliotekanauki.pl/articles/243678.pdf

Data publikacji:

2013

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

indicator diagram
heat release characteristics
marine diesel engine diagnosis

Opis:

The paper presents the results of research of the influence of clogged injector nozzles in fuel injection system on the shape of heat release characteristics. The study was conducted on a laboratory four-stroke marine engine, type Sulzer 3Al 25/30, with nominal power Ne = 408 kW at nominal rotational speed n = 750 rpm. The study was carried out according to active experiment plan, during which the engine failure of the injection system was simulated. Simulation of loss of patency of injector nozzles (clogged) was to completely clog two holes of nine injection injector nozzle holes with a diameter of 0,325 mm. Measurements were made at a constant engine speed of 750 rev/min for five loads: 50, 100, 150, 200, 250 kW. Measurements of pressure of combustion were performed by means of tensometric sensors of Spice Company. Based on measured pressure curves heat release characteristics were determined. The algorithm allows the determination of net heat release rate q and the net generated heat Q characteristics. Based on the obtained results it can be concluded that significant improvement in the diagnostic use of indicator diagrams can be obtained by using heat release characteristics. These characteristics are correlated with the process of fuel injection and the injection pump operation. As demonstrated in the work of analysing the heat release rate q, it is possible to infer diagnosis on the technical condition of the fuel injection system.

Źródło:

Journal of KONES; 2013, 20, 3; 307-314
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 23.

Tytuł:

Zastosowanie sygnałów prędkości drgań do diagnostyki wtryskiwaczy silników spalinowych
Application of signals of the velocity vibration to diagnostic of diesel engine injectors

Autorzy:

Monieta, J.
Rokicki, P.

Powiązania:

https://bibliotekanauki.pl/articles/329378.pdf

Data publikacji:

2005

Wydawca:

Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN

Tematy:

diagnostyka
silniki okrętowe
wtryskiwacze
diagnostics
marine diesel engine
injectors

Opis:

Praca stanowi próbę zastosowania sygnałów prędkości drgań do diagnostyki wtryskiwaczy silników okrętowych w fazie eksploatacji. Najpierw przeprowadzono badania wstępne z wykorzystaniem eksperymentu czynnego na stanowisku systemu wtryskowego poza silnikiem. Zbadano wpływ nastawy paliwowej na parametry sygnałów prędkości drgań w dziedzinie amplitudy i częstotliwości przy różnych mocowaniach czujników pomiarowych.
The work is determining of application of he signals of velocity vibration to diagnostic of marine diesel engine injectors in operating phase. In the first place have been make preliminary investigations with utilisations of active experiment on the state of injection system out engine. There have been investigated influence of fuel setting on parameters of the signals of velocity vibrations in amplitude and spectrum domain at various fastens of measurement sensors.

Źródło:

Diagnostyka; 2005, 33; 229-234
1641-6414
2449-5220

Pojawia się w:

Diagnostyka

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 24.

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

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 25.

Tytuł:

Analysis of diagnostic utility of torque and rotational speed fluctuation of propulsion shaft

Autorzy:

Dereszewski, M.
Polanowski, S.
Charchalis, A.

Powiązania:

https://bibliotekanauki.pl/articles/247279.pdf

Data publikacji:

2011

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

marine diesel engine
diagnostics
failure simulation
torque and speed analysis

Opis:

In the paper has been presented the analysis of diagnostic utility of signals, deriving from torque (measured value is an instantaneous shaft's torsion angle, torque value is subsequently calculated basing on shaft's steel Kirhoff's modulus or Young's modulus values) and angular acceleration of the propulsion shaft. All measurements has been carried out using photo optic torque meter ETNP-10, which was installed at the propulsion shaft run by two-stroke low speed marine diesel engine. In order to distinguish diagnostic signals, measurements of healthy engine run and subsequently simulations of a failure by one cylinder cut-off (suspending of a fuel pump) were done. Analysis of torque, revolutionary speed, angular acceleration were and subsequently, in order to distinguish spectral attributes of above functions, fast Fourier transform of speed waveforms were carried out. Diagrams presented in the paper shows comparison of mentioned above signals' waveforms. The most significant influence of simulated combustion process deviation at a signal's variation was noticed when rotational speed and angular acceleration of the shaft were considered. Acquired results of research and measurements are to be a subject of further analysis in order to define representative symptoms and diagnostic values corresponding to propulsion system and engine failures.

Źródło:

Journal of KONES; 2011, 18, 4; 77-83
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 26.

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

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 27.

Tytuł:

Analysis of measurement methods for fuel injection spray parameters from marine engine injector

Autorzy:

Lewińska, J.

Powiązania:

https://bibliotekanauki.pl/articles/242247.pdf

Data publikacji:

2016

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

marine diesel engine
spray characteristics
optical methods
Mie scattering
shadowgraphy

Opis:

One of the main factors influencing on the optimal combustion process in a marine diesel engine’s cylinder is the fuel injection spray and the fuel atomization. The complexity of mentioned phenomena in the marine diesel engine’s cylinder may cause difficulties in their analysis. Measurement methods, allowing obtaining information about the process of fuel injection and evaporation in the diesel engine’s cylinder are qualified as optical visualization methods. It provides non-invasive measurement of parameters of fuel injection spray. The article presents the analysis of various aspects of optical measurement methods application that allow specifying parameters of fuel injection spray in the diesel engine’s cylinder. Initial studies were carried out using Mie scattering method. In addition, visualization obtained by shadowgraphy method was presented also. The constant volume chamber was used as a working area. The conventional light source was used in case of Mie scattering and a laser light source in shadowgraphy. For the lighting test was used a double-pulse Nd:YAG laser. The wavelength laser 532 nm was used. A course of the injection process was recorded by high-speed camera. The Mie scattering method allows analysing the fuel injection phenomena in macro scale. Specified geometric parameters. The shadowgraphy method allows to asses parameters of diesel fuel injection from marine diesel engine’s injector in the micro scale.

Źródło:

Journal of KONES; 2016, 23, 4; 275-282
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 28.

Tytuł:

Marine diesel engine diagnostics in operating conditions
Diagnostyka okrętowych silników tłokowych w warunkach eksploatacji

Autorzy:

Lus, T.

Powiązania:

https://bibliotekanauki.pl/articles/329534.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN

Tematy:

silnik okrętowy wysokoprężny
diagnostyka
turbosprężarka
marine diesel engine
diagnostics
turbocharger

Opis:

Most of marine diesel engines are turbocharged. Conventional maintenance methods for engine turbochargers depend on bearings clearances checks between rotor shaft and bearing housing. Some parts of the turbocharger have to be checked on the special stands or by using endoscopic methods. Fuel oil not burnt to the end and severe engine working conditions (long time idling) led to several typical turbocharger malfunctions and damages of it in some cases. Always it is easier to prevent malfunctions than take repair works on any assets. In the paper results of main and auxiliary ship's diesel engines turbochargers diagnostic investigations are presented. Methods presented in the paper based on vibration signals processing in time and frequency domain. Using these methods for checking technical condition of the turbochargers and its rotors and bearings without stopping the engine and dismantling it is possible.
Większość silników okrętowych jest budowana, jako silniki doładowane turbosprężarką. Konwencjonalne metody diagnozowania turbosprężarek polegają na sprawdzaniu luzów łożyskowych pomiędzy wałem a tulejami łożysk. Niektóre części turbosprężarki muszą być sprawdzane na specjalnych stanowiska lub z wykorzystaniem metod endoskopowych. Niespalone do końca paliwo i ciężkie warunki pracy silnika (długotrwała praca na biegu luzem) prowadzą do występowania kilku typowych niesprawności a w niektórych okolicznościach uszkodzeń turbosprężarek. Zawsze jest łatwiej zapobiegać uszkodzeniom niż dokonywać napraw urządzeń. W artykule przedstawiono wyniki badań diagnostycznych turbosprężarek silników głównych i pomocniczych na okręcie. Metody prezentowane w referacie bazują na przetwarzaniu sygnałów drganiowych w dziedzinie czasu i częstotliwości. Stosowanie tych metod umożliwia ocenę stanu technicznego turbosprężarek wraz z ich wirnikami i łożyskami bez ich demontażu i zatrzymywania silnika.

Źródło:

Diagnostyka; 2012, 2(62); 43-47
1641-6414
2449-5220

Pojawia się w:

Diagnostyka

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 29.

Tytuł:

Knowledge management system for marine diesel engine diagnosis

Autorzy:

Charchalis, A.
Pawletko, R.

Powiązania:

https://bibliotekanauki.pl/articles/242163.pdf

Data publikacji:

2011

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

knowledge management system
diagnostic expert system
marine diesel engine diagnosis

Opis:

The paper presents the conception of knowledge management system for a diagnostic expert system. Development of knowledge management system is necessary during the construction of the expert system. The most important reason is that knowledge in this system is not a static whole, but is subject to dynamic growth, is modified and updated. Advantages afforded by the creation of diagnostic systems based on knowledge, such as expert systems, compared to traditional diagnostic systems based on closed algorithms were characterized. The conception of knowledge management system established in the diagnostic work associated with the development of expert system for marine diesel engine diagnosis. The main elements of the developed management system are: dictionary editor, rule editor, knowledge assessment module and import and export module. Knowledge management system is also equipped with an electronic form that is used to obtain knowledge from experts, specialists in diesel engines operation. The article presents the tasks and the performance of individual components of the system. The knowledge management system enables integration within a single frame of both information collected from experts and automatically collected one. A doubtless advantage of expert system is the opportunity of updating and developing the content recorded in the database. Due to this feature, the effectiveness of the system may grow during engine operation and facilitate gaining new experience.

Źródło:

Journal of KONES; 2011, 18, 2; 77-83
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 30.

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

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 31.

Tytuł:

Contemporary diagnostic and tuning methods for marine diesel engines
Współczesne metody diagnozowania i regulacji okrętowych tłokowych silników spalinowych

Autorzy:

Lus, T.

Powiązania:

https://bibliotekanauki.pl/articles/244329.pdf

Data publikacji:

2007

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

okrętowe silniki spalinowe
diagnozowanie
regulacja
marine diesel engine
diagnostics
tuning

Opis:

Contemporary diagnostic and tuning methods and diagnostic tools for marine diesel engines are presented in the paper. Most of them, in their principle, based on measurements of internal cylinder pressure traces, pressure traces in high pressure fuel lines and on vibration signals. Different methods of fuel injection systems monitoring and diagnosing are shown together with malfunction finding in marine engines valve-train mechanisms. Specific aspects of low-, medium- and high-speed marine diesel engines tuning processes are discussed and some examples of malfunction from real maintenance process of engines which were observed with such systems are shown in the paper. Cylinder head with exhaust valve broken, broken exhaust valve - MB820 engine, pressure curve in cylinder and mean pressure for all engine cylinders after three years engine overhaul, piston group dismantling for engine type TD48 are presented in the paper. The paper concentrates on strategy of the operation of shipping engines, examples of monitoring systems and diagnostic methods for shipping engines and examples of their damages and inefficients. The dynamic development of the different kind devices for the inspection of the technical state and regulation of shipping engines is an object the paper.
W referacie przedstawiono współczesne metody diagnozowania stanu technicznego i regulacji okrętowych tłokowych silników spalinowych. Metody bazujące na pomiarach przebiegów: ciśnień wewnątrz-cylindrowych, ciśnień w instalacji wtryskowej oraz przebiegów drgań. W szczególny sposób omówiono sposoby oceny pracy aparatury paliwowej oraz mechanizmów rozrządu zaworowego. Uwzględnione zostały specyficzne aspekty dotyczące regulacji silników wolno-, średnio- i szybkoobrotowych oraz silników wyposażonych w różne typy układów wtrysku paliwa. Referat zawiera eksploatacyjne przykłady niesprawności wybranych elementów silnika, których rozwój byłśledzony z wykorzystaniem metod diagnostycznych. Głowica cylindra z uszkodzonym zaworem wylotowym, przełom grzybka zaworu wylotowego silnika MB820, przebieg ciśnienia w cylindrze na tle uśrednionego przebiegu ciśnień dla całego silnika w ok. trzy lata po remoncie kapitalnym silnika, demontaż zespołu tłoka - silnik TD48 są ilustrowane w artykule. Artykuł koncentruje się na strategii eksploatacji silników okrętowych, przykładach systemów monitorowania i metod diagnostycznych dla silników okrętowych oraz Przykładach uszkodzeń i niesprawności silników okrętowych. Dynamiczny rozwój różnego rodzaju urządzeń do kontroli stanu technicznego i regulacji silników okrętowych jest przedmiotem artykułu.

Źródło:

Journal of KONES; 2007, 14, 4; 239-246
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 32.

Tytuł:

Combustion and emissions investigation on low-speed two-stroke marine diesel engine with low sulfur diesel fuel

Autorzy:

Yang, Zhiyuan
Tan, Qinming
Geng, Peng

Powiązania:

https://bibliotekanauki.pl/articles/259117.pdf

Data publikacji:

2019

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

NOx emission
CO2 emission
marine diesel engine
combustion
marine low sulfur diesel fuel

Opis:

With the implementation and expansion of international sulfur emission control areas, effectively promoted the marine low sulfur diesel fuel (MLSDF) used in marine diesel engines. In this study, a large low-speed, two-stroke, cross-head, common rail, electronic fuel injection marine diesel engine (B&W 6S35ME-B9) was used for the study. According to diesel engine’s propulsion characteristics, experiments were launched respectively at 25%, 50%, 75%, 100% load working conditions with marine low sulfur diesel fuel to analyze the fuel consumption, combustion characteristics and emissions (NOx, CO2 , CO, HC) characteristics. The results showed that: Marine diesel engine usually took fuel injection after top dead center to ensure their safety control NOx emission. From 25% to 75% load working condition, engine’s combustion timing gradually moved forward and the inflection points of pressure curve after top dead center also followed forward. While it is necessary to control pressure and reduce NOx emission by delaying fuel injection timing at 100% load. Engine’s in-cylinder pressure, temperature, and cumulative heat release were increased with load increasing. Engine’s CO2 and HC emissions were significantly reduced from 25% to 75% load, while they were increased slightly at 100% load. Moreover, the fuel consumption rate had a similar variation and the lowest was only 178 g/kW·h at 75% load of the test engine with MLSDF. HC or CO emissions at four tests’ working conditions were below 1.23 g/kW·h and the maximum difference was 0.2 or 0.4 g/kW·h respectively, which meant that combustion efficiency of the test engine with MLSDF is good. Although the proportion of NOx in exhaust gas increased with engine’s load increasing, but NOx emissions were always between 12.5 and 13.0 g/kW·h, which was less than 14.4 g/kW·h. Thus, the test engine had good emissions performance with MLSDF, which could meet current emission requirements of the International Maritime Organization.

Źródło:

Polish Maritime Research; 2019, 1; 153-161
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 33.

Tytuł:

Stan diagnostyki technicznej okrętowych silników tłokowych
The status of the marine diesel engines technical diagnostic

Autorzy:

Witkowski, K.

Powiązania:

https://bibliotekanauki.pl/articles/328463.pdf

Data publikacji:

2005

Wydawca:

Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN

Tematy:

diagnostyka eksploatacyjna
silniki okrętowe
diagnozowanie silników
operation diagnostic
marine diesel engine
diesel engine diagnostic

Opis:

W artykule przedstawiono okrętowy silnik tłokowy jako złożony obiekt diagnostyki. Podzielono go na układy funkcjonalne. Taka dekompozycja obiektu pozwala rozwiązywać zadania diagnostyczne w strukturach zdecentralizowanych. Omówiono możliwości diagnozowania silników okrętowych w warunkach eksploatacyjnych. Przedstawiono szereg przykładów wdrożonych do eksploatacji systemów diagnostycznych.
In his paper a marine diesel engine Has been described as a complex technical object. Divided into functional blocks. Such decomposition allows to solve diagnostic problems in decentralized structures. Also the possibilities of marine engine diagnostic have been described with a series of examples of systems already in use.

Źródło:

Diagnostyka; 2005, 34; 85-92
1641-6414
2449-5220

Pojawia się w:

Diagnostyka

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 34.

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

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 35.

Tytuł:

Evaluation of diagnostic information about marine engine work based on mesurement of the angular speed discrete value

Autorzy:

Dereszewski, M.
Charchalis, A.
Polanowski, S.

Powiązania:

https://bibliotekanauki.pl/articles/247911.pdf

Data publikacji:

2012

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

diagnostics
marine diesel engine
angular speed
photo optical signal
failure simulation

Opis:

The paper presents results of the experiment, aimed on finding the answer whether IAS (Instantaneous Angular Speed) and angular acceleration of the crankshaft is carrying information about quality of combustion in cylinder of the diesel engine. The experiment was carried out at laboratory stand in Gdynia Maritime University, equipped with diesel engine Sulzer 3AL 25/30 driving electro-generator. Sulzer 3AL 25/30 is three cylinder, medium speed, four stroke marine diesel engine, with maximum output 408 kW at 750 rpm. In order to evaluate of IAS utility for diagnosis of the engine, two kinds of malfunctions of engine's fuel system were simulated. First malfunction was fuel leakage from high-pressure line; the second was partly plugged injector's nozzle. Construction of high-pressure fuel pump enables to simulate fuel leakage. The level of leakage was controlled by simultaneous measurement of pressure in the high-pressure tube. For simulation of injector malfunction, the chocked one was installed in second cylinder. The engine was running at different loads, starting from around 25% up to 70% of nominal. The IAS was measured and recorded by the measurement system ETNP-10, which mode of operation was based on perforated disc mounted at the shaft and photo-optic sensor counting laser impulses. Results of all measurement were smoothed in order to eliminate a noise. Measurement results of fault condition were compared with healthy engine measurements and with results of in-cylinder pressure diagrams, in order to detect all deviation from normal condition.

Źródło:

Journal of KONES; 2012, 19, 2; 121-128
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 36.

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

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 37.

Tytuł:

Conceptual Design and Performance Analysis of an Exhaust Gas Waste Heat Recovery System for a 10000TEU Container Ship

Autorzy:

Ma, Zheshu
Yang, Dong
Guo, Qiang

Powiązania:

https://bibliotekanauki.pl/articles/259008.pdf

Data publikacji:

2012

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

exergy efficiency
marine diesel engine
thermal efficiency
waste heat recovery system

Opis:

According to operation characteristics of the main engine 9K98ME-C7, a combined turbines-exhaust gas waste heat recovery system is proposed to recover waste heat and increase system energy efficiency. Thermodynamic models based on the first thermodynamic law and the second thermodynamic law are formulated. The superheated steam yield, the total electric power yield, the first thermodynamic law efficiency, the exergy efficiency at different exhaust gas boiler working pressure, and the variation of the exergy efficiency under different feed water temperature and different steam turbine back pressure are analyzed. Thermodynamic results indicate that the most appropriate exhaust gas boiler pressure is 0.8MPa for studied main engine and the total thermal efficiency with combined turbines arrangement has climbed up to 53.8% from 48.5%.

Źródło:

Polish Maritime Research; 2012, 2; 31-38
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 38.

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

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 39.

Tytuł:

Diagnozowanie przebiegu ciśnienia w komorach spalania okrętowych silników spalinowych z wykorzystaniem sygnału drganiowego
Diagnosis of course of pressure in combustion chambers of marine diesel engines with utilize of vibration signals

Autorzy:

Monieta, J.
Waleriańczyk, P.

Powiązania:

https://bibliotekanauki.pl/articles/327570.pdf

Data publikacji:

2008

Wydawca:

Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN

Tematy:

silnik okrętowy
ciśnienie
spalanie
diagnozowanie
marine diesel engine
combustion
pressure
diagnosis

Opis:

W artykule przedstawiono wyniki badań zastosowania sygnałów przyspieszeń drgań do diagnozowania przebiegu ciśnienia spalania w średnio-obrotowych silnikach wysokoprężnych. Badania wstępne przeprowadzono w warunkach laboratoryjnych na średnio-obrotowym okrętowym silniku wysokoprężnym z wykorzystaniem eksperymentu czynnego. Badano wpływ obciążenia względnego zespołu prądotwórczego na wartości wykorzystywanych parametrów diagnostycznych. Przetwarzane sygnały diagnostyczne przyspieszeń drgań za pomocą toru pomiarowego, analizowano z wykorzystaniem technik komputerowych w dziedzinie czasu, amplitudy i częstotliwości. Starano się wyselekcjonować symptomy diagnostyczne skorelowane z obciążeniem względnym silnika. Wybrano symptomy diagnostyczne ściśle skorelowane z obciążeniem względnym, które powinny być skorelowane również ze stanem technicznym.
In article have been presented of investigations values utilize of vibration acceleration for diagnosis of course of combustion pressure in medium-speed high-pressure engines. The researches has make in laboratory conditions on the medium speed marine diesel engines driven a generator, with utilization of effective experiment. There have been investigated influence of relative loads of generator set on the values of utilized diagnostic parameters. Processed of diagnostic signals of acceleration vibration oscillations behind assistance of measuring line, have been analyzed with utilization computer techniques in sphere of time, amplitudes and frequencies. It tries to select of diagnostic symptoms with relative load of engine correlated. Have been selected of diagnostic symptoms strictly correlated with relative load. These parameters should been correlated with technical state.

Źródło:

Diagnostyka; 2008, 2(46); 157-163
1641-6414
2449-5220

Pojawia się w:

Diagnostyka

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 40.

Tytuł:

Methods for determining mechanical losses of marine diesel engines
Metody wyznaczania strat mechanicznych okrętowego tłokowego silnika spalinowego

Autorzy:

Wontka, L.

Powiązania:

https://bibliotekanauki.pl/articles/222626.pdf

Data publikacji:

2018

Wydawca:

Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich

Tematy:

mechanical losses
marine diesel engine
straty mechaniczne
okrętowy tłokowy silnik spalinowy

Opis:

The paper presents based on literature critical evaluation of commonly known methods for determining the mechanical losses of a piston engine. Their advantages and disadvantages were pointed out also the possibility of their use in a marine propulsion system was assessed.
W artykule przedstawiono krytyczną ocenę powszechnie znanych metod wyznaczania strat mechanicznych silnika tłokowego na podstawie literatury. Wskazano na ich wady i zalety oraz oceniono możliwość ich zastosowania w okrętowym układzie napędowym.

Źródło:

Zeszyty Naukowe Akademii Marynarki Wojennej; 2018, R. 59 nr 3 (214), 3 (214); 25-38
0860-889X

Pojawia się w:

Zeszyty Naukowe Akademii Marynarki Wojennej

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 41.

Tytuł:

Attempt of injectors failure detection based on measurement of the angular speed discrete value

Autorzy:

Dereszewski, M.
Charchalis, A.

Powiązania:

https://bibliotekanauki.pl/articles/245442.pdf

Data publikacji:

2013

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

diagnostics
marine diesel engine
angular speed
photo optical signal
failure simulation

Opis:

The paper presents results of the experiment focused on detection of faulty injector of medium speed diesel engine, in way of analysis of IAS (Instantaneous Angular Speed) of the crankshaft. The experiment was carried out at laboratory stand in Gdynia Maritime University, equipped with diesel engine Sulzer 3AL 25/30 driving electrogenerator. Sulzer 3AL 25/30 is three cylinder, medium speed, four stroke marine diesel engine, with maximum output 400 kW at 750 rpm. In order to evaluate of IAS utility for diagnosis of the engine, two kinds of wrong adjustment of fuel injection valve’s spring were simulated. First malfunction was too weak spring (initial tension of 15.0 MPa against 25.0 MPa in normal condition), the second was too strong tension of the spring (35.0 MPa). The base of experiment was to angular speed recording, in three different conditions of the engine: healthy one and with two simulated malfunctions. Measurements were carried out at two different loads, respectively 150 kW and 250 kW. The IAS was measured and recorded by the measurement system ETNP-10, which mode of operation was based on perforated disc mounted at the shaft and photo-optic sensor counting laser impulses. Noise decomposition of measurement results was based on triple smoothing using Savitzky-Golay filter. IAS runs of faulty engine were compared with healthy engine measurement, in order to detect all deviation from normal condition.

Źródło:

Journal of KONES; 2013, 20, 3; 131-137
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 42.

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

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 43.

Tytuł:

Investigation of the influence of chemical interaction aftermarket additives on lubricating properties of Marinol RG 1240 engine oil

Autorzy:

Młynarczyk, A.

Powiązania:

https://bibliotekanauki.pl/articles/243149.pdf

Data publikacji:

2013

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

trunk piston marine diesel engine
lubricating oil
lubricating properties
aftermarket additive

Opis:

The paper presents the results of lubricating properties tests of Marinol RG 1240 motor oil used in trunk piston marine diesel engines and modified by chemical interaction aftermarket additives – Motor Life Professional and Mind. The test results were collected by means of a four-ball extreme pressure tester T-02 according to Polish Norm PN-76/C-04147. The following lubricating properties parameters were determined: weld load Pz, maximum nonseizure load Pn, seizure load Pt, load wear index Ih and load limit of wear Goz. Investigations showed that tested chemical interaction aftermarket additives improve load wear index Ih, and seizure load Pt (in case of Motor Life Professional), simultaneously impair maximum non-seizure load Pn. Weld load Pz remains on the same level. But the load limit of wear Goz which characterises the wear resistance in extremely hard working conditions increases considerably- 542% for tested oil with the addition of 5% by volume of Motor Life Professional and 520% with the addition of 5% by volume of Mind additive. These results indicates that tested aftermarket additives can form additional boundary layer (independent of lubricating oil boundary layer) which activates in extreme working conditions (very high temperatures and loads) of the sliding node elements. That layer could protect machines elements against seizure. In authors opinion, modifying of motor oils (provided with antiwear and antiseizure additives by the manufacturer) by chemical interaction aftermarket additives can increase durability and reliability of the machine elements especially in hard working condition for example frequent starts and load changes, overloads, operation in polluted atmosphere (transport, mining, building engineering etc.).

Źródło:

Journal of KONES; 2013, 20, 2; 285-290
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 44.

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

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 45.

Tytuł:

The application of spectrum analysis of course of pressure in combustion chamber for diagnosis of medium speed marine diesel engines

Autorzy:

Monieta, J.
Rutkowski, J.

Powiązania:

https://bibliotekanauki.pl/articles/243650.pdf

Data publikacji:

2008

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

piston marine diesel engine
course of combustion pressure
diagnosis
spectrum analysis

Opis:

In this work has been undertaken a study test the application course of combustion pressure signals in combustion chamber the marine medium-speed engine to diagnostic. In research has been used active experiment. The pressure signals analysis in cylinder has been carried out in amplitude and frequency domain, as new method for result processing. In preliminary research has been carried out with used marine engine 5BAH22 with current generator, be present in Engines Room Laboratory the Maritime Academy in Szczecin. Preliminary research has consisted in measurement the course of combustion pressure signals in individual cylinders and analysis the combustion pressure signals in time, amplitude and frequency domain at different engine load the combustion engine and has been checked that diagnostic parameters will be correlate with engine load. The current generator has been loaded with water resistor. The purpose of this work have been selected sensitive diagnostic symptoms and checked their usability in diagnosis marine diesel engine. In principal research has been simulated inability the turbocharger air filter as his mechanical impurities. Useful diagnostic symptoms have been determined. The method were being verified, execute operating research on working marine diesel engines at port and shipyard.

Źródło:

Journal of KONES; 2008, 15, 3; 367-374
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 46.

Tytuł:

Evaluation of adequacy of a model of a marine diesel engine based upon empirical research

Autorzy:

Kniaziewicz, Tomasz
Zacharewicz, Marcin

Powiązania:

https://bibliotekanauki.pl/articles/2097458.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Naukowe Silników Spalinowych

Tematy:

marine diesel engine
diagnostics
modeling
okrętowy tłokowy silnik spalinowy
diagnostyka
modelowanie

Opis:

The article presents a mathematical model of a marine diesel engine developed for the needs of the research on the innovative method of evaluating technical condition of a marine engine. Basic assumptions of the method under development have also been included. The main focus has been directed on the evaluation of adequacy of a mathematical model of a marine diesel engine proposed in this article. In addition, measures of adequacy for the needs of the conducted research have also been presented. Finally, the article shows results from the conducted research followed by conclusions.

Źródło:

Combustion Engines; 2020, 59, 2; 40--45
2300-9896
2658-1442

Pojawia się w:

Combustion Engines

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 47.

Tytuł:

Marine engine indicated power uncertainty determination
Wyznaczanie niepewności mocy indykowanej silnika okrętowego

Autorzy:

Kowalak, P.

Powiązania:

https://bibliotekanauki.pl/articles/133668.pdf

Data publikacji:

2015

Wydawca:

Polskie Towarzystwo Naukowe Silników Spalinowych

Tematy:

marine diesel engine
indicated power
uncertainty
silnik okrętowy
moc indykowana
niepewność

Opis:

A proposal of marine engine indicated power uncertainty evaluation method was presented. The uncertainties of the indicated power definitional formula components were evaluated. Methods of uncertainty estimation for measurement carried out in industrial conditions were proposed. A new component called a phase shift angle, in modified formula for the piston kinetic was introduced. The indicated power uncertainty was divided into two calculable parts called uncertainty category I and uncertainty category II. The results of the uncertainties determined for two marine engines: trunk piston and cross-head type were presented. The influence of the individual component of indicated power formula for the overall indicated power uncertainty value was shown.
Zaprezentowano propozycję metody oceny niepewności mocy indykowanej silnika okrętowego. Określono niepewności składników definicyjnego równania mocy indykowanej. Przedstawiono metody szacowania niepewności dla pomiarów przeprowadzonych w warunkach przemysłowych. W zmodyfikowanym równaniu ruchu tłoka wprowadzono nową wielkość fizyczną określoną jako kąt przesunięcia fazowego. Zaproponowano także podział niepewności mocy indykowanej na dwie obliczalne części, nazwane niepewnością rodzaju I oraz niepewnością rodzaju II. Przedstawiono wyniki niepewności wyznaczonych dla dwóch silników okrętowych: wodzikowego i bezwodzikowego. Zaprezentowano wpływ poszczególnych składników równania mocy indykowanej na wartość jej całkowitej niepewności.

Źródło:

Combustion Engines; 2015, 54, 2; 3-13
2300-9896
2658-1442

Pojawia się w:

Combustion Engines

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 48.

Tytuł:

Comparison of selected models useful in ranking the root causes of explosions in marine engine crankcases

Autorzy:

Wiaterek, Daniel
Chybowski, Leszek

Powiązania:

https://bibliotekanauki.pl/articles/24202590.pdf

Data publikacji:

2022

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

marine diesel engine
main engine
prime mover
crankcase explosion
process modelling
root causes

Opis:

This article aims to compile, describe and compare three different models taken from the literature describing the causes of explosions in the crankcases of marine engines. Each of the models has a different level of detail and was prepared with a different purpose. However, the same process, explosions in crankcases, was analyzed in all cases. A statistical evaluation of the frequency of events leading to explosions, a model built using failure mode and effects analysis (FMEA) and a model based on fault tree analysis (FTA) are described in turn. The FTA model drawn from the literature formed the basis for further analysis. Values of important measures of all elementary events of the fault tree were calculated using the Birnbaum reliability measure, Vesely-Fussell measure, Birnbaum structural measure, criticality measure and improvement potential. The percentage importance values of all events determined using these importance measures were compared. The results obtained from the application of each model were evaluated. The results of the models were compared with each other, and an approach using all three models supplemented with diversion analysis was proposed.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2022, 72 (144); 77--85
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 49.

Tytuł:

The problematics of determining the characteristics of heat release, based on experimental indicator diagram for diagnostic purposes

Autorzy:

Witkowski, K.

Powiązania:

https://bibliotekanauki.pl/articles/246500.pdf

Data publikacji:

2016

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

marine diesel engine
indicated parameters
indicator diagram
heat release characteristics
adiabatic exponent

Opis:

The article discusses the problem of determining the characteristics of heat release based on experimental indicator diagram for diagnostic purposes. The importance of the operational diagnosis of marine engines is the analysis of indicator diagrams was identified. In addition to analysing changes in the values of indicated, should be aimed to oriented broader analysis, including the determination on the basis of experimental indicator diagram of heat release characteristics during the combustion process. Then it is essential to choose the right model of heat release for reciprocating piston engines with direct fuel injection. In the diagnostics of piston engines, including marine engines, special interest arouses use single-zone model based on indicator diagrams as a source of information. Based on the results their own research we analysed the impact on the characteristics of heat release of simplifying assumptions in the model of heat release, including constant value adiabatic exponent. In the temperature, range 300÷2800 K waveformsκ are considered to be linearly dependent on the temperature. Based on the above, for the gas temperature from 800 K to 1850 K value of the exponent κ decreases about 3%. The effect of the value κ on the course of characteristics q and Q, to the typical marine engines was shown.

Źródło:

Journal of KONES; 2016, 23, 1; 429-436
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce

Skocz do pozycji: 50.

Tytuł:

The possibility of fuel injection pump diagnosis on the basis of indicator diagram

Autorzy:

Pawletko, R.

Powiązania:

https://bibliotekanauki.pl/articles/246551.pdf

Data publikacji:

2014

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

indicator diagram
heat release characteristics
marine diesel engine diagnosis
fuel pump leakage

Opis:

The paper presents the results research related to the possibility of fuel injection pump diagnosis on the basis of indicator diagram. The study was conducted on a laboratory four-stroke marine engine, type Sulzer 3Al 25/30, with nominal power Nen = 408 kW at nominal rotational speed n = 750 rpm. The study was carried out according to active experiment plan, during which the engine failure of the injection system was simulated. Simulation of fuel pump leakage was completed by the opening of the adjusting screw on the pump discharge. Measurements were made at a constant engine speed of 750 rev/min for five loads: 50, 100, 150, 200, 250 kW. Measurements of pressure of combustion were performed by means of tensometric sensors of Spice Company. Based on measured pressure curves heat release characteristics were determined. The algorithm allows the determination of net heat release rate q and the net generated heat Q characteristics. Based on the obtained results it can be concluded that significant improvement in the diagnostic use of indicator diagrams can be obtained by using heat release characteristics. These characteristics are correlated with the process of fuel injection and the injection pump operation. As demonstrated in the work of analyzing the heat release rate q, it is possible to infer diagnosis on the technical condition of the fuel injection system.

Źródło:

Journal of KONES; 2014, 21, 1; 215-221
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

Zmień widok

• na półce