Temat: Diesel - Katalog OPAC zbiorów

Skocz do pozycji: 1.

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

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Skocz do pozycji: 2.

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

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Skocz do pozycji: 3.

Tytuł:: Impact of rise of exhaust resistance at torque and angular speed of two-stroke engine
Autorzy:: Dereszewski, M.
Charchalis, A.
Powiązania:: https://bibliotekanauki.pl/articles/245462.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: diagnostics
diesel engine
exhaust pipe resistance
torque
angular speed
Opis:: It is assumed that elements of Exhaust Gases Cleaning Systems creates additional resistance along fumes duct and can affect energetic process of combustion. In the paper are presented results of researches aimed on detection and recognition of dumping effect in the exhaust pipeline using devices dedicated for engine’s torque and angular speed measurement. The experiment was carried out in test stand of Gdynia Maritime University; equipped with one-cylinder, low speed engine working in two-stroke mode. Effect of increasing of gas flow resistance was achieved by installation of shutters in cross-section of exhaust pipe. The shutters diminished active flow „window“ for 50% of normal crossection area of the exhaust pipe The plan of measurements encompasses registration of Instantaneous Angular Speed of the engine’s shaft and parallel registration of Instantaneous Value of Shaft Torsion, what reflect fluctuation of torque. Value of angular speed and toque enables exact calculation of power produced by the engine. Experiment included measurements at different levels of engine’s load and with changes of mean rotational speed. Angular speed and shaft’s torsion were measured and recorded using system ETNP-10 which is based on optical sensor and set of toothed discs. That method gives high accuracy of angular speed and torsion measurement. Results of experiment are presented as difference of related curves of values’ variations of angular speed and torsion occurring at the propulsion shaft connecting the engine and the water brake.
Źródło:: Journal of KONES; 2015, 22, 4; 87-93
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

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

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Skocz do pozycji: 5.

Tytuł:: New methods of marine power plant diagnostics
Autorzy:: Charchalis, A.
Szyfelbain, M.
Powiązania:: https://bibliotekanauki.pl/articles/245418.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: diesel engine
diagnostics
roughness
surface
silnik wysokoprężny
diagnostyka
chropowatość
powierzchnia
Opis:: Up-to-date, of high-tech design techniques of machine operation require constant monitoring on some levels. Generally, the monitoring today is limited to failure detection and machinery components check. The Marine Engineering Faculty of Gdynia Maritime University designed the System for Marine Engine Operation Assistance on the basis of Sulzer Diesel AL 25/30 testing station. The engine modernization and wider research and survey capabilities resulted in engine operation quality improvement, marine power plant research enhancement. The project broadens the research range and engine failure expertise as well as takes into consideration innovative marine fuel emissions. The goal has been achieved in the way of the test equipment modernization including: effective pressure sensors, high pressure fuel sensors, monitoring and visualization of the engine systems’ parameters, electronic indictors adopted to continuous operation at all cylinders in the same time, and high class decision aid computer equipment. Engine modernization and data base extension allow for carrying out a wide scope of research. Additionally, the article presents innovative diagnostic solutions together with their applications.
Źródło:: Journal of KONES; 2018, 25, 1; 33-40
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

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

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Skocz do pozycji: 7.

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

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Skocz do pozycji: 8.

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

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Skocz do pozycji: 9.

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

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Skocz do pozycji: 10.

Tytuł:: Diagnostic and measurement system dedicated for marine engines exploitatory attributes evaluation
Autorzy:: Charchalis, A.
Powiązania:: https://bibliotekanauki.pl/articles/248147.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: diesel engines
marine engines
engine diagnostic
exploitatory attributes evaluation
pressure sensors
Opis:: Modern way of machines' exploitation, due to their high level of constructional complication, requires certain level of supervising. That supervising is generally reduced to detection of pre-failure states and evaluation of machines’ single elements or components condition. In the frame of development of the research capacity of the Mechanical Faculty of Maritime Academy in Gdynia, has been developed the Exploitation Decision Aid System for marine engines exploitation, based on existing test bed with the marine diesel engine Sulzer AL 25/30. Modernization of the engine, significantly extended research and measurement capacity, what has resulted with improvement of quality, extension of the span, and acceleration of carried out research and development works in the domain of safety of exploitation and diagnostics of marine power plants. Above stated investments enables also an extension of the range of research and expertise related to engines' failures and exhaust gases emission pollution, in relation to broad spectrum of implemented fuels. The goal has been achieved in the way of the test equipment modernization including: effective pressure sensors, high pressure fuel sensors, monitoring and visualization of the engine systems' parameters, electronic indictors adopted to continuous operation at all cylinders in the same time, and high class decision aid computer equipment.
Źródło:: Journal of KONES; 2012, 19, 1; 35-40
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Abatement of particulate matter and SO2 emission by ships
Autorzy:: Jaworek, A.
Krupa, A.
Marchewicz, A.
Sobczyk, A.
Czech, T.
Ottawa, A.
Śliwiński, Ł.
Antes, T.
Kurz, M.
Szudyga, M.
Charchalis, A.
Powiązania:: https://bibliotekanauki.pl/articles/245025.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine transport
diesel exhausts
air pollution control
environment protection
PM removal
Opis:: Ship engines emit noxious gases (SO2, NOx, and VOC) and particulate matter (PM), mostly black carbon. Since 1990, the International Maritime Organization (IMO) regulations gradually restricted the level of emission of NOx, which since 2016 have to be lower than 2-3.4 g/kWh, depending on engine power. SO2 emission reduction has begun since 2010 and now the content of sulphur in marine fuels is limited to 3.5%. At the same time, the Sulphur Emission Control Areas (SECA) has been established, at which the sulphur content in fuel cannot be higher than 0.1%. Since 2020, only a fuel of 0.5% sulphur can be used at all cruising areas outside SECA. It should be noted that due to lack of efficient technology, IMO still has not issued regulations regarding the PM emission by ships. The paper discusses various electrostatic techniques used for the reduction of PM emission in Diesel engine exhausts. Electrostatic scrubber systems, using seawater, allow removal of PM from exhausts with high efficiency and simultaneously SO2 gas. Electrostatic agglomerators allow increasing submicron and nanoparticles by coagulation of those particles to the larger ones, which could be removed by conventional techniques.
Źródło:: Journal of KONES; 2016, 23, 4; 183-192
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Analiysis of propulsion for various types of ships in aspects of power required and fuel consumption during exploitation
Autorzy:: Charchalis, A.
Powiązania:: https://bibliotekanauki.pl/articles/242618.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: shipbuilding
calculation of propulsive marine power
hulls resistances of ship
diesel engines
Opis:: The paper presents comparative analysis of energetic possibilities of different ships with close parameters of displacement and operational ailing range, for selected type of main engine. Analysis is related to three types of ships, i.e. bulk carrier, tanker and container ship, with assumed displacement at level of 120 000DWT and typical for that ships sailing speed. The analysis concerns shipping route from Gdynia to Shanghai. First step of conducted analysis was based on elaboration of the list of contemporary similar ships for every class, their general dimensions, dimensional coefficients, and subsequently evaluation of hulls resistances using Holtrop – Mennen Method necessary for calculation of propulsive power, main engines’ selection, most convenient for every type of ship and calculation of trips durations and fuel consumptions. All calculations were done assuming typical cruising speed for considered types of ships, it means 25 knots for container ships and 15 knots for tankers and bulkers. Results of carried out calculations lets come to the conclusion that total time of trip duration of container ship is 1.5 times shorter and fuel consumption is 2.5 times higher comparing with tankers and bulk carriers going on the same trip. Taking under consideration constantly growing prices of heavy oil, that situation is inconvenient from economical point of view. Above facts explains general trend to reduce speed of container ships presented by almost all shipping companies. The way of speed’s reduction is decreasing of continuous power rate of main engine, what is related to necessity of blinding or dismounting some numbers of turbochargers. Hypothetic example of such operation and its impact at operational properties were analysed, and results showed, that exploitation parameters of the container ship begun closer to bulk carriers and tankers but could not achieve proper level of efficacy due to not optimal hull shape and engine characteristic.
Źródło:: Journal of KONES; 2015, 22, 4; 53-57
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: The use of expert system for marine diesel engine diagnosis
Zastosowanie systemu eksperckiego do diagnozy wysokoprężnych silników okrętowych
Autorzy:: Charchalis, A.
Pawletko, R.
Powiązania:: https://bibliotekanauki.pl/articles/222054.pdf
Data publikacji:: 2012
Wydawca:: Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:: diagnostyka techniczna
system ekspercki
wysokoprężne silniki okrętowe
technical diagnostic
expert system
marine diesel engines
Opis:: The paper presents a diagnostic system for marine diesel engine based on an expert system model. The research relevant to knowledge acquisition for this system was done, knowledge data set was built and general structures of the expert system was proposed. Basic sources of knowledge which can be used for construction of knowledge data set are also identified. The basic knowledge related to the diesel diagnostic was undertaken from experts and diagnostic data base. The paper questionnaire was used to the knowledge acquisition from experts. The basic knowledge related to the marine diesel exploitation was undertaken. The rule induction algorithms was used to knowledge acquisition from data base. During the experiment efficiency of LEM induction algorithms was compared to new MODLEM and EXPLORE algorithms. Training and test data were acquired from experiment on marine engine Sulzer 3AL 25/30.
Artykuł przedstawia system diagnostyczny okrętowego silnika wysokoprężnego oparty na modelu systemu eksperckiego. Przeprowadzono badania odpowiednia dla pozyskania informacji o tym systemie, stworzono zestaw danych oraz zaproponowano struktury ogólne systemu eksperckiego. Zidentyfikowano również podstawowe źródła informacji, które mogą być wykorzystane do budowy zestawu danych wiedzy. Podstawowa wiedza odnosząca się do diagnostyki silników wysokoprężnych została wzięta z eksperckich i diagnostycznych baz danych. Wykorzystano kwestionariusz papierowy w celu uzyskania wiedzy od ekspertów. Uzyskano podstawowe informacje odnoszącą się do eksploatacji silników okrętowych. Zastosowano algorytmy rule induction do uzyskania informacji z bazy danych. Podczas eksperymentu sprawność algorytmów induction LEM została porównana z nowymi algorytmami MODLEM i EXPLORE. Dane szkoleniowe i testowe zostały uzyskane z eksperymentu na silniku okrętowym Sulzer 3AL 25/30.
Źródło:: Zeszyty Naukowe Akademii Marynarki Wojennej; 2012, R. 53 nr 1 (188), 1 (188); 49-56
0860-889X
Pojawia się w:: Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Monitoring of instantaneous angular speed of the crankshaft for control of the ship engine performance changes
Monitorowanie chwilowej prędkości kątowej wału korbowego w celu kontroli zmian jakości pracy silnika okrętowego
Autorzy:: Charchalis, A.
Dereszewski, M.
Powiązania:: https://bibliotekanauki.pl/articles/328049.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: diagnostyka
silnik okrętowy
chwilowa prędkość kątowa
wał
diagnostics
marine diesel engine
instantaneous angular speed
Opis:: The paper presents an idea to utilize crankshaft's angular speed variation and its derivative for monitoring of trouble of diesel engine combustion quality. Measurement of instantaneous angular speed, long term recording and archive of values is enable by modern programmable logic controllers. Measurement of IAS (Instantaneous Angular Speed) is done using optical sensor and toothed disc. Advantage of this method is simple installation and constant signal. Collected data can be processed on board, basing on MS Excel formulas. Observation of changes of instantaneous speed and acceleration can not replace Main Effective Pressure measurement or vibration monitoring, but tool for early warning. When a signal of deteriorating of engine performance is obtain, more accurate diagnostic can be implemented. Expected final result will be elimination of engine's cycle's irregularity. Proposed method is at early stage of investigation and further steps to prove its utility and to develop concluding rules are to be conducted. In the paper are presented preliminary analysis of some bunches of data collected from two bulk carriers, operating in similar conditions.
W artykule przedstawiono ideę wykorzystania funkcji zmian prędkości kątowej wału korbowego oraz jej pochodnej do monitorowania zakłóceń równomierności pracy cylindrów. Pomiar prędkości chwilowej, zapis i archiwizacja wartości jest możliwa dzięki zastosowaniu sterownika programowalnego. Zalety powyższej metody to łatwość instalacji systemu oraz uzyskiwanie bieżącego sygnału. Zebrane dane mogą być obrabiane na statku, w oparciu o formuły zapisane w programie MS Excel. Obserwacja zmian chwilowej prędkości i przyspieszenia kątowego nie zastąpi typowych pomiarów takich jak pomiar ciśnienia indykowanego lub monitoring drgań, jest jednak doskonałym narzędziem do wczesnego informowania i ostrzegania. Przedstawiona metoda jest na wczesnym etapie badań i wymaga dalszych analiz w celu wykazania jej użyteczności diagnostycznej oraz określenia reguł wnioskowania. W artykule przedstawiono wstępne analizy pakietów danych pochodzących z dwóch masowców operujących w podobnych warunkach.
Źródło:: Diagnostyka; 2011, 4(60); 53-58
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Development trends in contemporary container vessels designs
Tendencje rozwojowe w projektach współczesnych statków - kontenerowców
Autorzy:: Charchalis, A.
Krefft, J.
Powiązania:: https://bibliotekanauki.pl/articles/241687.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: okrętownictwo
kontenerowce
TEU
morskie siłownie
silniki wysokoprężne
shipbuilding
container vessels
marine power plants
diesel engines
Opis:: Stały wzrost zapotrzebowania na handel morski spowodował silny rozwój floty kontenerowców. Wielkość światowej floty kontenerowców wynosiła 3400jednostek w marcu 2005 a zaledwie rok później osiągnęła ona wartość około 3800 jednostek. Co więcej, światowa lista zamówień na kontenerowce zawiera ponad 1000 jednostek. Liczba największych kontenerowców rośnie zgodnie z liczbą pływających po morzu kontenerowców. Przewidywalny jest wzrost zapotrzebowania na małe statki dostawcze i statki dostawcze z większą pojemnością handlową, oznaczającą większą liczbę TEU na pokładzie i większą prędkością rejsową, wzrost wynikający z większej liczby kontenerowców o dużych pojemnościach zawijających do kilku głównych portów morskich. Te małe statki dostawcze i statki dostawcze zapewnią handel pomiędzy dużymi terminalami kontenerowymi i małymi portami spełniając funkcje zaopatrzeniowe. Współczesne statki kontenerowe mają pojemność ładunku dochodzącą do 14 000 TEU i przewiduje się, że pojemność ta osiągnie wartość 18 000 TEU z prędkością podróżną wynoszącą 28 węzłów. Powoduje to konieczność wykorzystania jako głównych silników statków silników Diesla o mocach wyjściowych dochodzących do 100 000 kW ze sprawnością około 50%. Artykuł zawiera klasyfikację floty kontenerowców opartą na liczbie TEU i obszarze żeglugowym, jak również zawiera opisy konfiguracji morskich siłowni dla współczesnych kontenerowców, z uwzględnieniem napędu głównego, siłowni elektrycznych i parowych. Ponadto, omówione zostały współczesne trendy w budowie kadłubów okrętowych i morskich siłowni.
Permanent growth of sea trade demand has contributed to strong expansion of container carriers. The capacity of the worlds container fleet was about 3400 vessels in March 2005 and only one year later it reached the number of about 3800 ships. What is more, there are over 1000 container carriers in the world's order book. The number of the biggest capacity container carriers is growing along with the number of container vessels at sea. The increasing demand for small feeders and feeders with higher trade capacity, meaning more TEU on board and higher en route speed resulting from higher number of large capacity container carriers that will call at a few main seaports, is predictable. These small feeders and feeders will trade between big container terminals and smaller ports as suppliers. Contemporary container vessels have a load carrying capacity of up to 14 000 TEU and it is foreseen that the capacity will reach 18 000 TEU with voyage speed amounting to 28 knots. It causes the necessity of using diesel engines whose output power is even 100000 kW with an efficiency of about 50% as the main ship propulsion. The container vessel fleet classification based on TEU number and trading area as well as configurations of marine power plants for the contemporary container vessels regarding main propulsion, electric power and boiler plants have been shown in the article. Moreover, the trends of ship hulls and marine power plants are discussed.
Źródło:: Journal of KONES; 2008, 15, 4; 99-107
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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