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Tytuł:
Choice of a pilot dose in dual fuel self-ignition engine of a generator, depending on its load
Autorzy:
Imiołek, M.
Piętak, A.
Śmieja, M.
Wierzbicki, S.
Powiązania:
https://bibliotekanauki.pl/articles/247241.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engine
gas engine
dual fuel powering
CNG
Opis:
One of the basic problems concerning dual fuel powering of self-ignition engines is to determine the minimal dose of diesel oil injected into the combustion chamber in order to trigger self-ignition. Most research conducted to date on double-fuel powering self-ignition has been carried out on engines with mechanical injection systems, which does not ensure the possibility of obtaining very small diesel oil doses initiating self-ignition. The original system of fuelling the engine with diesel oil was replaced with a laboratory Common Rail system. The basic parameters of injector operation were controlled by a specially-developed system ensuring continuous choice of parameters of injector operation. The examined engine was fitted with a prototypical system of methane-air fuelling and a system for controlling and adjusting the supplied dose of methane This study presents the results of research aiming at determining the pilot dose injected into the combustion chamber of the engine to ensure the course of combustion in the engine operating under various loads. The results presented in the paper concern tests of a single-cylinder self-ignition engine, HATZ 1B40, operating in a generator adopted for CNG fuelling.
Źródło:
Journal of KONES; 2011, 18, 4; 129-136
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nowoczesny autobusy silnik MAN E0836 LOH zasilany gazem ziemnym
Autorzy:
Wołoszyn, R.
Powiązania:
https://bibliotekanauki.pl/articles/311141.pdf
Data publikacji:
2011
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
silnik gazowy
silniki autobusowe
gas engine
buses engine
Opis:
W artykule przedstawiono nowy silnik MAN E0836 LOH firmy MAN spełniający normy Euro 5 EEV dzięki zastosowaniu trójdrożnego katalizatora spalin. Zastosowanie silników zasilanych gazem stanowi możliwość obniżenia kosztów przedsiębiorstw transportowych oraz przyczynia się do zmniejszenia negatywnego oddziaływania transportu na środowisko.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2011, 12, 4; 20-22
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The onset of knock in gas fuelled spark ignition engines prediction and experiment
Autorzy:
Karim, G. A.
Powiązania:
https://bibliotekanauki.pl/articles/244289.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engine
gas engine modelling
engine performance knock criterion
Opis:
An approach for predicting the onset of knock and estimating its intensity in spark ignition engines is described. It is based on evaluating a dimensionless energy functional group, Kn, formulated to provide a numerical criterion to test continually, while using predictive models of the performance of spark ignition engines, for the onset of knock and its relative intensity at any instant during the combustion process. The basis for the derivation of this knock criterion and its significance are described. Examples involving gaseous fuels and their mixtures under different operating conditions show how the criterion can be employed for the prediction of the onset of knock and the associated knock-limited performance. It is shown that this approach can be made an integral part of modeling spark ignition engine operation to be used for optimizing engine performance while ensuring throughout the avoidance of the onset of knock. Among other things variations relative energy release and end gas mass fraction during flame propagation for non-knocking and border line knocking conditions, variations in the calculated knock criterion value with time for knock free, light and heavy knocking conditions, with compression ratio for hydrogen and methane as a fuel CFR engine, calculated optimum spark timing maximum power variation the probability of the incidence of knock versus spark timing, the suppression of the onset of knock through lean operation or cooled EGR are illustrated in the paper.
Źródło:
Journal of KONES; 2007, 14, 4; 165-175
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of the over-expanded cycle combustion engine
Autorzy:
Jamrozik, A.
Tutak, W.
Grab-Rogaliński, K.
Powiązania:
https://bibliotekanauki.pl/articles/245973.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
over-expanded cycle
methane
gas engine
modelling
Opis:
The study concerns numerical tests of an internal combustion engine operating according to the over-expanded cycle carried out in the AVL Fire software. The research covered the modelling of a full working cycle of a conventional engine operating in accordance with the classic Otto cycle and an engine operating on the basis of an over-expanded cycle – the Atkinson cycle. As part of the work, three cases of Atkinson’s cycle were analysed, by closing the inlet valve before BDC (21º before BDC) and closing the valve after BDC (41º and 75º after BDC). As a result of modelling, space-time distributions of velocity, pressure and temperature in the cylinder of the modelled engine were obtained. Optimizations of the analysed cycles were carried out, finding the best ignition timing, at which it is possible to obtain the highest efficiency and the highest indicated mean effective pressure. The calculations showed that the engine operating according to the over-expanded cycle in order to obtain the best operating parameters requires earlier ignition timing compared to the conventional engine. In addition, in the engine operating according to the Atkinson cycle, there is a drop in the indicated mean effective pressure and an increase in the indicated thermal efficiency compared to the engine operating by the classical cycle.
Źródło:
Journal of KONES; 2018, 25, 3; 237-245
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling the characteristics of axial compressor of variable flow passage geometry, working in the gas turbine engine system
Autorzy:
Wirkowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/259564.pdf
Data publikacji:
2007
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
marine gas turbine engine
Opis:
This paper concerns application of mathematical modelling methods to analyzing gas-dynamic processes in marine gas turbines. Influence of geometry changes in axial compressor flow passage on kinematical air flow characteristics, are presented. The elaborated mathematical model will make it possible to realize – in the future – simulative investigations of gas-dynamic processes taking place in a compressor fitted with controllable guide vanes.
Źródło:
Polish Maritime Research; 2007, 3; 27-32
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The performance and emissions characteristics of a compressed natural gas spark ignition engine
Autorzy:
Abu Bakar, R.
Semin, Semin
Idris, A.
Powiązania:
https://bibliotekanauki.pl/articles/950140.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
compressed natural gas engine
emission
performance
spark ignition
Opis:
This paper presents the experimental results of a spark ignition engine to evaluate its performance and emissions characteristics while using conventional fuel and alternative fuel; compressed natural gas (CNG). To evaluate the performance, the engine is operated between 1500-4000 rpm, under steady state condition with wide open throttle (WOT). The emissions test was performed with various constant loads at each speed. The first experiment is did by using conventional fuel and followed by CNG. The engine performance and emissions results such as brake power, brake specific fuel consumption (BSFC), CO, HC and NOx from CNG were measured and compared to conventional fuel. The experiment has performed at Automotive Laboratory Faculty of Mechanical Engineering, University Malaysia Pahang by using in-housed developed engine test rig. From the experiment being done it is demonstrated that the potential of reducing emissions while applying CNG as fuel is obvious. However, the further study of required improving the performance of the engine. The results and analysis will be useful for the development of dedicated CNG engine in the future. The application of CNG as fuel for spark ignition engine gives the average reduction power of 25% at WOT, 45% at POT and gives the average brake power reduction of 37% at WOT and 56% at POT base from spark ignition engine. Average BSFC of CNG are near about 33% higher than gasoline for WOT and 39% higher than gasoline for POT. The average CO emission reduction is reduction is 66% at WOT and 64% at POT. The average reduction of CO2 emission at WOT while using CNG is 6% and at POT only 1%. The average reduction of HC emission at WOT is 76% and at POT is 74%. The average reduction of NOx emission at WOT is 15% and at POT is 18%. The disadvantages of CNG as fuel in spark ignition engine has reduced power 37-56%, but the advantages for environment protection CNG as fuel has reduced the exhaust gas emissions.
Źródło:
Journal of KONES; 2008, 15, 2; 9-14
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The concept of measuring vibration in PRAMAC S12000 generating set
Autorzy:
Jagiełło, A.
Trzmiel, K.
Włostowski, R.
Wróbel, R.
Powiązania:
https://bibliotekanauki.pl/articles/246297.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
engine vibrations
gas supplied engine
FFT
Opis:
Vibration measurements are now widely applied and developed field of science. The article is an example of the application of that field diagnostic using the accelerometer. The study was conducted at Honda GX630 combustion engine in a current generator system. The generator is characterized in that it can be powered by either liquid fuel, or which gas. The results of vibration measurements is presented for (both) gas mixtures containing varying concentrations, as well as for gasoline. The paper presents the results of the vibration, based on an analysis of the time and frequency domain, using Fast Fourier Transform. In the analysis analogue filters, and digital filters (windowing) was used. The analysis includes proposals concerning vibrations difference for individual substances in comparison to vibrations of engine powered a classic, liquid fuel. To simplify the analysis, and thus the discussion on the results, the data presented in the charts with honours major changes in the received, digitized results. Measurements and results presented in the article were carried out as part of a pilot project to support research and development in scale demonstration DEMONSTRATOR+ (WND- DEM-1-527 / 001).
Źródło:
Journal of KONES; 2015, 22, 4; 117-123
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gaz koksowniczy paliwem do silnika gazowego
Coke oven gas as a fuel for gas engine
Autorzy:
Sobolewski, A.
Ściążko, M.
Robak, Z.
Rudkowski, M.
Borowiec, Z.
Powiązania:
https://bibliotekanauki.pl/articles/133939.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
gaz koksowniczy
naftalen
silnik gazowy
coke oven gas
naphthalene
gas engine
Opis:
Gaz koksowniczy otrzymywany w koksowniach podczas produkcji koksu zawiera w swoim składzie ponad 50% wodoru, ok. 25% metanu, ok. 6% tlenku węgla oraz ok. 2% wyższych węglowodorów i posiada wartość opałowa na poziomie 18 MJ/m3. W zależności od wielkości produkcji zakładu koksowniczego dostępny jest w ilościach od 5 – 100 tys. m3/h. Wykorzystanie go jako paliwa do silnika gazowego, z uwagi na zawarte w nim zanieczyszczenia, głównie naftalenu i smoły jest utrudnione. Opracowana została oryginalna, bezodpadowa metoda dodatkowego doczyszczania gazu koksowniczego z naftalenu i smół na drodze wymywania olejem napędowym, który utylizowany jest jako dawka zapłonowa w silniku dwupaliwowym. Rozwiązanie zostało zgłoszone do ochrony patentowej.
Coke oven gas acquired during production of coke is composed of 50% hydrogen, about 25% methane, about 6% carbon monoxide and around 2% of higher hydrocarbons and has a lower heating value about of 18 MJ/m3. Depending upon the scale of production of coke plant it is available in quantities from 5-100 thousand m3/h. Application as a fuel for gas engine, due to contaminants in its composition, mainly naphthalene and tars is difficult. An original, waste free, method was developed for additional cleaning of coke gas from naphthalene and tars on the basis of scrubbing with diesel oil, which is utilized further as an ignition injection in dual fuel engine. This solution has been applied for a patent protection.
Źródło:
Combustion Engines; 2013, 52, 3; 837-842
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gaz kopalniany. Doświadczenia z eksploatacji silników gazowych
Mines gas. Experience from the operation of gas engines
Autorzy:
Grzywnowicz, Grzegorz
Kalwar, Adam
Kurdziel, Franciszek
Powiązania:
https://bibliotekanauki.pl/articles/1841094.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
silniki gazowe
kogeneracja
metan
energetyka gazowa
gas engine
cogeneration
methane
gas energy
Opis:
W artykule opisano doświadczenia związane z wieloletnią eksploatacją kogeneracyjnych agregatów prądotwórczych napędzanych silnikami gazowymi dla których jako paliwo wykorzystywany jest metan. Poruszono temat związany z pozyskaniem gazu z odmetanowania kopalń jako paliwa napędowego do silników gazowych. Zasygnalizowano problematykę związaną z poszukiwaniem rozwiązań badawczo-naukowych i ich zastosowania w przemyśle, w celu znalezienia rozwiązań zwiększających niezawodność parku maszynowego przy jednoczesnym utrzymaniu lub redukcji kosztów.
There are described experiences connected with perennial exploitation of the cogenerational engine generators powered by gas engines which are fueled by methane in the article. There is covered a subject connected with sourcing the gas from demethanization of mines as an impulsive fuel for gas engines. There is signalized the issues connected with searching the experimental solutions and applying them in the industry to find the solutions increasing the reliability of the machinery park in the simultaneous maintenance or cost reduction.
Źródło:
Systemy Wspomagania w Inżynierii Produkcji; 2019, 8, 1; 280-289
2391-9361
Pojawia się w:
Systemy Wspomagania w Inżynierii Produkcji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The importance of mixture preparation for industrial heat and power gas engines
Autorzy:
Romańczyk, M.
Elsner, W.
Powiązania:
https://bibliotekanauki.pl/articles/246334.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
gas engine
environmental friendly power generation
combustion processes
mixture preparation
Opis:
The main task of a gas mixer is to mix the fuel (gas) with air in such a way that in the gas engine optimal combustion takes place. A high efficiency of the whole combustion process and low emissions are the decisive optimization parameters. An industrial gas engine operates mostly with a lean air-gas combustion mixture with an air excess coefficient ratio of → λ=1.6. Most often heat and power industrial gas engines operate with biogas. The biogas is produced by anaerobic digestion, where biodegradable materials in the absence of oxygen are fermented. That is why the biogas fuel consists mostly of methane → CH4 (up to 70 [%]), carbon dioxide → CO2 and traces of other contaminant gases. It is well known, that the performance of industrial gas engines strongly depends on the quality of air and fuel mixing and therefore homogeneity of the mixture. Improper air-gas mixture can lead to unstable operation of the entire gas engine and excessive emissions beyond the applicable environmental standards. Therefore, in this article numerical investigations were performed using the open source computational fluid dynamics software OpenFOAM to show the importance of mixture preparation for industrial heat and power gas engines by describing in detail the mixing behaviour in a Venturi gas mixer model.
Źródło:
Journal of KONES; 2018, 25, 3; 385-392
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Miller cycle application to the gaseous supercharged SI engine
Zastosowanie obiegu Millera do doładowanego silnika gazowego o zapłonie iskrowym
Autorzy:
Grab-Rogaliński, K.,
Szwaja, S.
Powiązania:
https://bibliotekanauki.pl/articles/133773.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
gas engine
indicated parameters
Miller cycle
silnik gazowy
parametry indykowane
obieg Millera
Opis:
The paper contains results of tests on the spark ignited (SI) engine modified to work as the engine with the overexpanded thermodynamic Miller cycle. Investigation was particularly focused on thermodynamic properties of the applied Miller cycle as well as combustion progress in the supercharged engine fuelled with various gaseous fuels as follows: coke gas, natural gas and hydrogen. Crucial conclusions deal with experimental investigation. The conclusions showed the following: IMEP was maintained at the same level with aid of supercharging, thermal indicated efficiency increased.
W artykule przedstawione zostały wyniki stanowiskowych silnika o zapłonie iskrowym przystosowanym do pracy na zasadzie obiegu Millera. Badania skupiały się na właściwościach termodynamicznych wykorzystanego obiegu Millera jak również przebiegu spalania w doładowanym silniku zasilanym różnymi paliwami gazowym takimi jak: gaz koksowniczy, gaz ziemny, wodór. Główne wnioski uzyskane zostały w wyniku badań eksperymentalnych i wskazały wzrost odporności na spalanie stukowe przy wykorzystaniu obiegu Millera oraz podwyższenie sprawności indykowanej.
Źródło:
Combustion Engines; 2015, 54, 3; 881-885
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of multi - role aircraft mission type on the low bypass engine performance parameters
Autorzy:
Wygonik, P.
Powiązania:
https://bibliotekanauki.pl/articles/242065.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
gas turbine engine design
airplane-engine integration
aircraft mission optimization
Opis:
The aim of the article is to find the relationship and dependencies between the mission parameters of the multi-role aircraft (altitude, flight velocity, thrust load) and the parameters that define the flow of the turbofan engine. The conclusions of these studies are relevant at the stage of preliminary engine design. There was built the model of thermal cycle of low bypass. The model of an airplane was simplified to its aerodynamic characteristics. The mission was divided into air tasks (stages) such as a take-off, a climb at a certain velocity, sub and supersonic flight and maneuvers (i.e. turn). Dimensionless energy criteria binding both the engine and aircraft parameters were introduced. There were conducted the simulation studies of the model airplane-engine mission to show the part of the mission that "dimensions " the engine. The results were limited to the presentation of the impact of circuit parameters such as T3, π, μ on the defined criteria. The calculations were carried out for a number of selected missions defined in the literature as Loll, HiLoHi and HiHiHi. The comparison of the energy requirements of these missions was done. There were pointed out these criteria of the mission evaluation that may affect making decisions at early design stages. There were designated the areas of design variability in an engine meeting the criteria for energy mission. The advantage of this model is universal character of dimensionless criteria, whereas the disadvantage is the need to build complex models of the engine and the assumption at the outset aerodynamic characteristics of the aircraft. The originality of the presented solution is to show an alternative, unconventional approach to the design process (not as so far) the engine itself but the entire aviation system.
Źródło:
Journal of KONES; 2013, 20, 3; 435-442
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Usage of Cold Forcing Method for a Gas Turbine Engine of Supersonic Transport
Autorzy:
Gutakovskis, Viktors
Gudakovskis, Vladimirs
Blumbergs, Ilmārs
Sarma, Elina
Powiązania:
https://bibliotekanauki.pl/articles/2201886.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
aviation
GTE
gas turbine engine
supersonic
plane
aircraft
Opis:
The article discusses the current state of development of supersonic transport, analyses the main limitation of the use of gas turbine engines when flying at high supersonic flight speeds, proposes a method for expanding the range of GTE limitations in these flight modes of the aircraft, using cold forcing of the engine, conducts an analytical study of the effectiveness of this approach, proposes one of the possible devices for the implementation of cold forcing, the efficiency of an engine with cold forcing is shown, which may be of significant interest for the application of cold forcing methods in gas turbine engines of supersonic transport.
Źródło:
Advances in Science and Technology. Research Journal; 2023, 17, 1; 267--273
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the combustion processes in the gas turbine module of an fpso operating on associated gas conversion products
Autorzy:
Cherednichenko, Oleksandr
Serbin, Serhiy
Dzida, Marek
Powiązania:
https://bibliotekanauki.pl/articles/259197.pdf
Data publikacji:
2019
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
thermo-chemical heat recovery
gas turbine engine
associated gas
combustor
Opis:
In this paper, we consider the issue of thermo-chemical heat recovery of waste heat from gas turbine engines for the steam conversion of associated gas for offshore vessels. Current trends in the development of offshore infrastructure are identified, and the composition of power plants for mobile offshore drilling units and FPSO vessels is analyzed. We present the results of a comparison of power-to-volume ratio, power-to-weight ratio and efficiency for diesel and gas turbine power modules of various capacities. Mathematical modeling methods are used to analyze the parameters of an alternative gas turbine unit based on steam conversion of the associated gas, and the estimated efficiency of the energy module is shown to be 50%. In the modeling of the burning processes, the UGT 25000 serial low emission combustor is considered, and a detailed analysis of the processes in the combustor is presented, based on the application of a 35-reaction chemical mechanism. We confirm the possibility of efficient combustion of associated gas steam conversion products with different compositions, and establish that stable operation of the gas turbine combustor is possible when using fuels with low calorific values in the range 7–8 MJ/kg. It is found that the emissions of NOx and CO during operation of a gas turbine engine on the associated gas conversion products are within acceptable limits.
Źródło:
Polish Maritime Research; 2019, 4; 149-156
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experiences with gas engines during practical ship operations – impact of load fluctuations during generator operations on the ship’s power grid
Autorzy:
Rother, S.
Watter, H.
Powiązania:
https://bibliotekanauki.pl/articles/135382.pdf
Data publikacji:
2018
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
LNG
gas engine
dual-fuel engine
load fluctuation
MODELICA
simulation
fluid dynamics
thermodynamics
practical advice
ship operation
Opis:
Liquefied natural gas (LNG) qualifies as sustainable and secure marine fuel that is reliable in supply. The international standards (IGF Code) and classification regulations have been aligned. First experiences in ship operations and design are now available. Initial reports from the practical ship operations show that the lack of knowledge and misjudgements of original equipment manufacturers (OEM’s), suppliers, consulting services and flag state authorities have led to operational restrictions or expensive retrofitting. The aim of this paper is to illustrate first experiences and operating instructions using this new and different marine fuel; derive recommendations for instructions for education and training programmes at maritime colleges, universities and business partners; present action recommendations for future operational concepts.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2018, 55 (127); 44-50
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
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