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Tytuł:
Anomalies in combustion of hydrogen in a SI engine modified to work as a supercharged one
Autorzy:
Szwaja, S.
Cupiał, K.
Grab-Rogaliński, K.,
Powiązania:
https://bibliotekanauki.pl/articles/246823.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion
hydrogen
internal combustion engine
supercharging
Opis:
The paper describes combustion anomalies of various types randomly or permanently occurring while hydrogen is burnt in a supercharged spark ignited reciprocating engine. The anomalies were mainly identified as result of combustion pressure data analysis. Originally, the engine was a compression ignition one fuelled with diesel fuel. Modifications done on the engine dealt with decrease in its geometric compression ratio and equipping it with a spark plug located in diesel fuel injector position. The anomalies presented in the paper are typically associated with several abnormal phenomena as follows: flame propagation into intake manifold called back-fire, hydrogen spontaneous ignition by hot surface, flame propagation during valves overlap and extinguishing spark discharge flame kernel by high turbulence around a spark plug. These anomalies were observed in the supercharged engine, however, some of them were also detected while the engine was operated as a freely aspirated one. As investigated, some of these malfunctions would have been removed by change in engine operating parameters. Others need major changes in both exhaust pipeline geometry, hydrogen injection system, engine cylinder geometry and valve timing.
Źródło:
Journal of KONES; 2012, 19, 3; 437-442
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The risk of hydrogen explosion in a submarine. Part 1, Catalytic combustion of hydrogen
Zagrożenie wybuchem wodoru na okręcie podwodnym. Cz.1, Katalityczne dopalanie wodoru
Autorzy:
Kłos, R.
Powiązania:
https://bibliotekanauki.pl/articles/366485.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Medycyny i Techniki Hiperbarycznej
Tematy:
submarine
risk of hydrogen explosion
okręt podwodny
zagrożenie wybuchem wodoru
Opis:
The series of articles discuss issues related to conducting high risk projects on the example of modernisation of hydrogen incinerators on a submarine. The article depicts a technical problem situation connected with catalytic hydrogen combustion on a submarine.
W cyklu artykułów przedstawiono problematykę prowadzenia projektu dużego ryzyka na przykładzie modernizacji spalarek wodoru na okręcie podwodnym. W artykule opisano techniczną sytuację problemową związaną z katalitycznym dopalaniem wodoru na okręcie podwodnym.
Źródło:
Polish Hyperbaric Research; 2016, 3(56); 7-23
1734-7009
2084-0535
Pojawia się w:
Polish Hyperbaric Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of creation and combustion process of hydrogen-air mixtures by optical method in isochoric chamber
Autorzy:
Brzeżański, M.
Papuga, T.
Rodak, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/133809.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
hydrogen-air mixture
isochoric combustion chamber
registration of pressure
filming of combustion process
mieszanina wodoru i powietrza
izochoryczna komora spalania
pomiar ciśnienia
proces spalania
Opis:
The article considers the analysis of combustion process of hydrogen-air mixture of variable composition. Direct injection of hydrogen into the isochoric combustion chamber was applied and the mixture formation took place during the combustion process. The influence of the dose distribution of the fuel supplied before and after ignition on the formation of the flame front and the course of the pressure in the isochoric combustion chamber was discussed. The filming process and registration of pressure in the isochoric chamber during research of combustion process was applied.
Źródło:
Combustion Engines; 2017, 56, 3; 121-125
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Premixed combustion of acetylene-hydrogen fuel mixtures for thermodynamic state generation in a constant volume combustion vessel
Autorzy:
Johnson, S.
Nesbitt, J.
Lee, S. -Y.
Naber, J. D.
Powiązania:
https://bibliotekanauki.pl/articles/242374.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engine
diesel engine
combustion processes
pressure vessel
preborn
Opis:
Flammability limits and flame speeds of dilute-lean fuel mixtures of hydrogen (H2) and acetylem premixed with oxygen (02) and nitrogen (N2) were examined with a detailed kinetics model. These mixtures are used in a preburn in a constant volume combustion vessel to create elevated temperatures and pressures with gas compositions that represent the thermodynamic state in a diesel engine combustion chamber at fuel injection and auto ignition. A mixture of hydrogen and acetylene with combined atomic hydrogen to carbon ratio (HCR) of 1.85 was used to match that of typical diesel fuel and results are shown in comparison to a previously used mixture with a HCR of 1.17. The lower flammability limit (LFL) of the HCR 1.85 fuel mixture was found at an equivalence ratio of 0.235, while flame speed and adiabatic combustion temperatures were also predicted for post preburn product oxygen levels between O and 21 percent. Flame speeds were shown to decrease with a reduction in oxygen concentration, an increase in nitrogen dilution, while combustion temperatures increased over most of this range. Trends for this relation of flame speed and temperature are presented and a new premixed fuel mixture with an HCR of 1.85 is proposed.
Źródło:
Journal of KONES; 2009, 16, 2; 199-208
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermodynamic cycle of combustion engine with hydrogen fuelling
Autorzy:
Sroka, Z. J.
Powiązania:
https://bibliotekanauki.pl/articles/246368.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engine
thermodynamics
hydrogen
Opis:
Shortage of crude oil gives the reason to look for any alternative engine fuel. One of them is the hydrogen, which will be the most lean fuel between others. Knowledge of hydrogen as an engine fuel, its properties, production and storage problems were analyzed in this paper. At the end own hydrogen concept based on Fiat engine 900ccm was shown. Theoretical comparison between thermodynamic cycles for engine run on conventional petrol and hydrogen was done. Results have given the green light to future development. Petroleum recourses run out have given the reasons to find alternative fuel. One of them could be hydrogen. According to analyze done in the project it can be found similarity between hydrogen engine with 1=1,0 to petrol engine with 1=0,9. Pressure of hydrogen charge is in this case higher of 0.42 mpa and there is calculated in strength of existing engine. The results of estimation show possibility to use hydrogen as a engine fuel, maybe first as a dual-fuel engine like LPG system. Emissions of nox for hydrogen engine as well as theoretical engine work cycles for analyzed cases are illustrated in the engine.
Źródło:
Journal of KONES; 2007, 14, 3; 573-578
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza mechanizmu spalania gazu o składzie zbliżonym do składu gazu z procesu podziemnego zgazowania węgla - przegląd literatury
The analysis of combustion gas mechanism of a composition similar to the composition of gas from underground coal gasification process - literature review
Autorzy:
Gil, I.
Powiązania:
https://bibliotekanauki.pl/articles/340589.pdf
Data publikacji:
2011
Wydawca:
Główny Instytut Górnictwa
Tematy:
spalanie gazu
zgazowanie węgla
podziemne zgazowanie węgla
spalanie metanu
spalanie tlenku węgla
spalanie wodoru
combustion gas
coal gasification
underground coal gasification
combustion of methane
combustion of carbon monoxide
combustion of hydrogen
Opis:
W procesie podziemnego zgazowania węgla (PZW) powstaje gaz, którego skład zależy od technologii zgazowania i parametrów procesu. Przykładowy skład gazu z PZW podano w (Stańczyk i in. 2011; Białecka 2008; Stańczyk 2008). Składał się on głównie z: ditlenku węgla (1-64 procent), wodoru (2, 41,2 procent) i tlenku węgla (1,3-33,2 procent). Pozostałe gazy to: metan (0,1-5,4 procent, etan (0,0-0,13 procent), tlen (-5,7 procent) i azot (0,-78,2 procent) (Stańczyk i in. 2011; Białecka 2008). Z analizy (Stańczyk 2008) wynika, że najbardziej ekonomiczne jest przetwarzanie otrzymanego niskokalorycznego gazu na energię elektryczną przez spalenie go w turbinie gazowej. Mechanizm spalania paliwa o niskiej wartości opałowej nie jest dobrze poznany. W literaturze znajdują się wprawdzie opisy badań mechanizmu spalania gazu syntezowego, ale opierają się one na reakcjach zachodzących podczas spalania wodoru i tlenku węgla (Frassoldati, Fravelli, Ranzi 2007; Starik i in. 2010). Natomiast gaz wytwarzany podczas podziemnego zgazowania węgla zawiera również metan (Stańczyk i in. 2011; Stańczyk 2008). Dlatego należałoby w rozpatrywanym mechanizmie uwzględnić także reakcje utleniania CH4. Mechanizm spalania metanu jest dobrze poznany1 (Miller, Bowman 1989; Kozlov 1959; Konnov 2009; Skjoth-Rasmussen i in. 2004; Westbrook, Dryer 1984). Choć badania procesu spalania metanu z dodatkami, tj. CO2, CO czy H2 lub gazów inertnych (azot czy argon) podejmowano na przestrzeni ostatnich lat [najstarsze źródło pochodzi z 1988 r. (Zhu, Egolfo-poulos, Law 1988)], to mechanizm zachodzącego procesu spalania pozostaje nadal przedmiotem dyskusji (Konnov, Dyakov 2005; Coppens, Konnov 2008; Chernovsky, Atreya, Im 2007; Le Cong, Dagaut 2007; U Cong, Dagaut, Dayma 2008; Le Cong, Dagaut 2008a). Dlatego w celu efektywniejszego wykorzysta-a gazu niskokalorycznego do zasilania turbin gazowych, konieczna jest analiza istniejących mechanizmów spalania metanu, wodoru oraz tlenku węgla, celem której będzie określenie reakcji dominujących w zachodzącym procesie jednoczesnego spalania H2, CH4, i CO oraz ustalenie wpływu CO2 i H2O na zachodzący proces. Dotychczas nie podjęto próby modelowania procesów spalania układów zawierających CH4/H2/CO/CO2/O2/N2/H2O, dlatego ważne jest poznanie mechanizmu zachodzącego procesu jako drogi do bezproblemowego modelowania spalania gazu z PZW w turbinach gazowych. W niniejszym artykule przedstawiono analizę istniejących mechanizmów spalania w układach zawierających CH4/H2/CO/CO2/O2/N2/H2O, ze szczególnym uwzględnieniem wpływu dodatków (CO2, CO, H2 i H20) na zachodzący proces spalania metanu.
The composition of the gas produced in the process of Underground Coal Gasification (USG) depends on the technology and operating parameters applied. It mainly composes with: carbon dioxidc (12-64 per cent), hydrogen (2,5-41,2 per cent) and carbon monoxide (1,3-33,2 per cent). The others are: methane (0,17-5,4 per cent), ethane (0,01-0,13 per cent), oxygen (0-5,7 per cent) and nitrogen (0,1-78,2 per cent) (Stańczyk et al. 2011; Białecka 2008; Stańczyk 2008). The analysis (Stańczyk 2008) clearly indicates that the combustion in the gas turbinę combustor is the most economical method for the utilization of UCG gas. The combustion mechanism of that Iow calorific value fuel is not well understood. In the literaturę we can found the combustion mechanisms of the synthesis gas, but they are based upon the combustion hydrogen and carbon monoxide (Frassoldati, Fravelli, Ranzi 2007; Starik et al. 2010). While, the UCG gas also contains methane (Stańczyk et al. 2011; Stańczyk 2008). Therefore, the combustion mechanism should also take into account the methane oxidation reactions scheme. The mechanism of methane combustion is well known2 (Miller, Bowman 1989; Kozlov 1959; Konnov 2009; Skjoth-Rasmussen et al. 2004; Westbrook, Dryer 1984). However, the mechanism of methane combustion with additives such as: C02, CO and H2or j inert gas (nitrogen or argon) is a relatively new topic [the oldest source is 1988 (Zhu, Egolfopoulos, Law 1988)] and the combustion mechanism is still discussed (Konnov, Dyakov 2005; Coppens, Konnov 2008; Chernovsky, Atreya, Im 2007; Le Cong, Dagaut 2007; Le Cong, Dagaut, Dayma 2008; Le Cong, Dagaut 2008a). Therefore, to more efficient use of the UCG gas to the turbinę sets, it requires the analysis the existing combustion mechanisms of methane, hydrogen and carbon monoxide. This analysis will identify the dominant chemical reactions which affect the H2, CH4, CO system combustion and determination the role of C02 and H2O as the additives in the combustion process. Because the previously numerical tests did not yield satisfactory results, therefore it is important to know the mechanism of this process, as a way to remove the difficulties involved in the modeling of the UCG gas combustion in the gas turbines. In this paper the analysis of the existing combustion mechanisms in the systems consising of I CH4/H2/CO/CO2/O2/N2/H2O was made and the additives effect in detail were discussed.
Źródło:
Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa; 2011, 3; 25-35
1643-7608
Pojawia się w:
Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermodynamic consequences of hydrogen combustion within a containment of pressurized water reactor
Autorzy:
Bury, T.
Powiązania:
https://bibliotekanauki.pl/articles/240634.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
powstrzymywanie
reaktor jądrowy
spalanie
wodór
combustion
containment
hydrogen
LOCA
nuclear reactor
Opis:
Gaseous hydrogen may be generated in a nuclear reactor system as an effect of the core overheating. This creates a risk of its uncontrolled combustion which may have a destructive consequences, as it could be observed during the Fukushima nuclear power plant accident. Favorable conditions for hydrogen production occur during heavy loss-of-coolant accidents. The author used an own computer code, called HEPCAL, of the lumped parameter type to realize a set of simulations of a large scale loss-of-coolant accidents scenarios within containment of second generation pressurized water reactor. Some simulations resulted in high pressure peaks, seemed to be irrational. A more detailed analysis and comparison with Three Mile Island and Fukushima accidents consequences allowed for withdrawing interesting conclusions.
Źródło:
Archives of Thermodynamics; 2011, 32, 4; 67-79
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation model of combustion engine with direct injection of hydrogen
Autorzy:
Blažek, J.
Brabec, P.
Powiązania:
https://bibliotekanauki.pl/articles/242159.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
Simulation model of combustion engine
direct hydrogen injection
Ricardo Wave
combustion process
spark ignition engine
Opis:
Fuel mixture formation inside a cylinder has become used more frequently in spark ignition engines in recent years. gas internal combustion engines can also benefit from this concept as direct injection into an engine 's cylinder during the compression stroke not only increases its volumetric efficiency but also eliminates adverse anomalies in the combustion process. This paper focuses on the development of a simulation model for a spark ignition engine with direct hydrogen injection into a cylinder. The Wave software was used for the simulation. A part of the paper depicts the model's verification. The study utilized a three-cylinder internal combustion engine with the total cylinder volume of 1.2 dm3. The concept of the engine is based on new, high-pressure injectors with 10 MPa inlet pressure (gas-hydrogen injection directly into the engine cylinder). Utilization of internal fuel mixture formation can be beneficial due to its enabling the control of the combustion process and gaseous emission generation. From the viewpoint of the engine's design, however, internal fuel mixture utilisation is more complicated as injectors have to be built into the cylinder head. The actual engine construction is housed in laboratories of the Technical University of Liberec, Department of Vehicles and Engines.
Źródło:
Journal of KONES; 2009, 16, 3; 15-21
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the impact of combustion hydrogen addition on operating properties of self-ignition engine
Ocena wpływu spalania dodatku wodoru na własności eksploatacyjne silnika o zapłonie samoczynnym
Autorzy:
Kruczyński, S.
Ślęzak, M.
Gis, W.
Orliński, P.
Powiązania:
https://bibliotekanauki.pl/articles/1365770.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
IC engines
hydrogen
diesel
heat emission
silniki spalinowe
wodór
olej napędowy
wydzielanie się ciepła
Opis:
The work presents the results of effect of the addition of hydrogen in an amount up to 9% of mass of diesel oil into the intake system of Perkins1104C-E44TA engine. The impact of hydrogen addition on process heat release in the combustion chamber and the concentration of CO, THC, NOX and PM in the exhaust at predetermined engine operating conditions. It was summarised that the analysis of the results does not justify the use of hydrogen as a fuel additive in self-ignition engines.
W pracy przedstawiono wyniki badań wpływu dodatku wodoru w ilości do 9% masy oleju napędowego do układu dolotowego silnika Perkins1104C-E44T. Oceniono wpływ dodatku na proces wydzielania ciepła w komorze spalanie i stężenia CO, THC, NOX i PM w spalinach w ustalonych warunkach pracy silnika. W podsumowaniu stwierdzono iż analiza wyników badań nie uzasadnia stosowania wodoru jako dodatku do paliwa w silnikach o zapłonie samoczynnym.
Źródło:
Eksploatacja i Niezawodność; 2016, 18, 3; 343-347
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie wpływu dodatku wodoru do kolektora dolotowego na emisję zanieczyszczeń stacjonarnego silnika spalinowego z bezpośrednim wtryskiem
Study of the emissions effects of hydrogen to the intake manifold on the stationary combustion engine with direct injection
Autorzy:
Idzior, M.
Bajerlein, M.
Bieliński, M.
Daszkiewicz, P.
Stobnicki, P.
Powiązania:
https://bibliotekanauki.pl/articles/133411.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
wodór
współspalanie
emisja
silnik z zapłonem samoczynnym
hydrogen
co-combustion
emissions
compression ignition engine
Opis:
W artykule omówiono wyniki z przeprowadzonych badań, w Instytucie Silników Spalinowych i Transportu Politechniki Poznańskiej dotyczące wpływu dodatku wodoru do oleju napędowego w aspekcie emisji CO, HC i cząstek stałych stacjonarnego silnika badawczego o zapłonie samoczynnym wyposażonego w elektromagnetyczny wtryskiwacz firmy Bosch. Scharakteryzowano wodór, jako paliwo silnikowe, oraz przedstawiono parametry pozwalające na współspalanie z paliwami konwencjonalnymi. Omówiono zastosowanie wodoru w silnikach tłokowych, stechiometryczny proces spalania wodoru oraz możliwości wykorzystania wodoru w Polsce. W części badawczej wykonane zostały badania dotyczące pomiaru stężenia związków toksycznych w spalinach, przy spalaniu paliwa konwencjonalnego (olej napędowy) oraz przy współspalaniu wodoru z olejem napędowym stosowanym w stacjonarnym silniku spalinowym.
The article discusses the results of the studies conducted at the Institute for Internal Combustion Engines and Transport, Poznan University of Technology on the effect of the addition of hydrogen to diesel fuel in terms of emissions of CO, HC and particulate stationary test engine ignition equipped with solenoid injectors from Bosch. Characterized hydrogen as a motor fuel, and shows the parameters for co-firing with conventional fuels. Discussed was the use of hydrogen in piston engines, the stoichiometric combustion of hydrogen and the possibility of using hydrogen in Poland. In some research studies have been done measuring the concentration of toxic compounds in the exhaust gas, the combustion of conventional fuel (diesel fuel) and through the combustion of hydrogen with diesel used in stationary combustion engine.
Źródło:
Combustion Engines; 2013, 52, 3; 752-756
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of hydrogen fuel in drive systems of rail vehicles
Autorzy:
Pielecha, Ireneusz
Engelmann, Danilo
Czerwinski, Jan
Merkisz, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/33317409.pdf
Data publikacji:
2022-05-24
Wydawca:
Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
Tematy:
Hydrogen
Hydrogen properties
Hydrogen storage
Hydrogen powered combustion engines
Opis:
The search for substitutes for modern fossil fuels incentivises the use of new propulsion systems (hybrid or electric) and the use of new fuels (gaseous, mainly hydrogen). The article discusses the basic issues related to hydrogen fuel: from its extraction, through the discussion of its properties to its use and applications. Analyzes of the energy consumption involved in its extraction or production were presented, classifying hydrogen in those terms. Great emphasis was placed on design solutions for the use of hydrogen in internal combustion engines, together with discussing the concept of its combustion. The methods of storing hydrogen in a condensed and compressed form were also presented, indicating at the same time the most modern solutions available, such as mixed systems – storage in cryo-compressed form. It has been shown that the combustion of hydrogen in internal combustion engines increases their efficiency, and at the same time significantly reduces the exhaust emissions of toxic gases – including the emission of nitrogen oxides.
Źródło:
Rail Vehicles/Pojazdy Szynowe; 2022, 1-2; 10-19
0138-0370
2719-9630
Pojawia się w:
Rail Vehicles/Pojazdy Szynowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the method of creating a hydrogen-air mixture on the emission of nitrogen oxides in a spark-ignition engine
Autorzy:
Brzeżański, Marek
Rodak, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/133569.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
NOx emission
hydrogen
combustion engine
direct injection
emisja tlenków azotu
wodór
silnik spalinowy
wtrysk bezpośredni
Opis:
The article presents an analysis of phenomena affecting the formation of nitrogen oxides during the combustion of a hydrogen-air mixture in a spark-ignition engine. Studies have been carried out to determine the strategy of creating and burning a hydrogen-air mixture that guarantees a low concentration of nitrogen oxides. This strategy limits the synthesis of nitrogen with atmospheric oxygen during engine operation.
Źródło:
Combustion Engines; 2019, 58, 3; 224-227
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Perspektywa progresu wskaźników ekologicznych silnika badawczego zasilanego olejem napędowym z domieszką wodoru
Progress perspective of indicators of engine diesel oil research supplied with a touch of hydrogen
Autorzy:
Daszkiewicz, P.
Idzior, M.
Bajerlein, M.
Karpiuk, W.
Powiązania:
https://bibliotekanauki.pl/articles/252400.pdf
Data publikacji:
2013
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
silnik o zapłonie samoczynnym
silnik Diesla
wodór jako paliwo
spalanie wodoru
Diesel engine
hydrogen as fuel
hydrogen combustion
Opis:
Praca składa się z dwóch części. Pierwsza prezentuje zagadnienia teoretyczne dotyczące wodoru jako paliwa alternatywnego do zastosowania w silniku z zapłonem samoczynnym. Drugą część stanowi analiza wyników badań współspalania wodoru rozpuszczonego w oleju napędowym. Badania miały na celu ocenę wpływu dodatku wodoru na stężenie związków toksycznych emitowanych przez silnik badawczy. Badania zostały przeprowadzone w trzech wariantach. Pierwszy wariant stanowił poziom odniesienia do pozostałych wyników i został przeprowadzony na silniku zasilanym niewzbogacanym olejem napędowym. W przypadku drugiego i trzeciego wariantu do silnika był dostarczony roztwór oleju napędowego z wodorem wprowadzony do mieszalnika przy ciśnieniu 0,1 bar i 0,2 bar nadciśnienia.
The work consists of two parts. The first presents the theoretical issues about hydrogen as an alternative fuel for use in compression ignition engine. The second part is an analysis of the results of co-combustion of hydrogen dissolved in diesel fuel. This study was to evaluate the effect of the addition of hydrogen to the concentration of toxic compounds emitted by the engine research. The study was conducted in three variants. The first option was the benchmark for the rest of the results and was carried out on the engine with diesel-powered. In the second and third variant it was delivered to the engine oil solution of hydrogen introduced into the mixer at a pressure of 0.1 bar and 0.2 bar overpressure.
Źródło:
TTS Technika Transportu Szynowego; 2013, 10; 591-602, CD
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of leaning hydrogen-air mixtures on engine combustion knock
Autorzy:
Szwaja, S.
Naber, J. D
Powiązania:
https://bibliotekanauki.pl/articles/243860.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
IC engine
lean hydrogen-air mixture
combustion knock
Opis:
Combustion of lean hydrogen-air mixtures in an internal combustion (IC) spark ignited (SI) engine in respect of combustion knock effect is presented in this paper. It is known that making the combustible mixture leaner leads to both decreasing in-cylinder peak temperature of combustion and lengthening ignition lag. It also increases combustion duration. Having these issues on mind it could be concluded that combustion knock intensity decreases as well. It is reported that such a hypothesis is also correct when hydrogen based fuels are combusted in the IC engine, although hydrogen as an engine fuel, on the contrary to gasoline, is very susceptible to knock generation throughout the entire combustion duration. At the beginning the paper examines the combustion knock intensity on the basis of in-cylinder pressure traces. Next, a test-bed and obtained experimental results of hydrogen combustion in the IC single cylinder CFR engine are showed. Finally, analysis of knock intensity referring to lean hydrogen-air mixture ratio, expressed by the excess air number so-called lambda, is carried out. Significant conclusion from the analysis is that there is strong negative correlation between the hydrogen knock intensity and the excess air number lambda. In the end, comparison with exhaust gas recirculation as alternative way to reduce combustion knock, and constraints for leaning the hydrogen-air combustible mixture for the IC engine are discussed in the paper.
Źródło:
Journal of KONES; 2008, 15, 2; 483-491
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Possible applications of prechambers in hydrogen internal combustion engines
Autorzy:
Matla, Jędrzej
Powiązania:
https://bibliotekanauki.pl/articles/2202513.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
hydrogen combustion
hydrogen knock
prechamber
H2ICE
combustion engine
spalanie wodoru
stuk wodorowy
komora wstępna
silnik spalinowy
Opis:
In order to ensure better control of the combustion process in a internal combustion engine powered by hydrogen, it has been proposed to use a split combustion chamber solution. Following paper contains a description of a hydrogen combustion system that includes an analysis of possible technical solutions. The considerations take into account the issues of the dual nature of hydrogen knocking and the problem of burning a stratified charge of a hydrogen-air mixture in a cylinder.
Źródło:
Combustion Engines; 2022, 61, 4; 77--82
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A numerical and experimental study of marine hydrogen–natural gas–diesel tri–fuel engines
Autorzy:
Zhao, Rui
Xu, Leping
Su, Xiangwen
Feng, Shiquan
Li, Changxiong
Tan, Qinming
Wang, Zhongcheng
Powiązania:
https://bibliotekanauki.pl/articles/1573839.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
hydrogen
tri-fuel engine
combustion performance
emission performance
Opis:
Maritime shipping is a key component of the global economy, representing 80–90% of international trade. To deal with the energy crisis and marine environmental pollution, hydrogen-natural gas-diesel tri-fuel engines have become an attractive option for use in the maritime industry. In this study, numerical simulations and experimental tests were used to evaluate the effects of different hydrogen ratios on the combustion and emissions from these engines. The results show that, in terms of combustion performance, as the hydrogen proportion increases, the combustion ignition delay time in the cylinder decreases and the laminar flame speed increases. The pressure and temperature in the cylinder increase and the temperature field distribution expands more rapidly with a higher hydrogen ratio. This means that the tri-fuel engine (H2 +CH4 +Diesel) has a faster response and better power performance than the dual-fuel engine (CH4 +Diesel). In terms of emission performance, as the hydrogen proportion increases, the NO emissions increase, and CO and CO2 emissions decrease. If factors such as methane escape into the atmosphere from the engine are considered, the contribution of marine tri-fuel engines to reducing ship exhaust emissions will be even more significant. Therefore, this study shows that marine hydrogen-natural gas-diesel tri-fuel engines have significant application and research prospects.
Źródło:
Polish Maritime Research; 2020, 4; 80-90
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania silnika zasilanego wodorem
Investigation of the combustion engine fuelled with hydrogen
Autorzy:
Brzeżański, M.
Cisek, J.
Marek, W.
Papuga, T.
Powiązania:
https://bibliotekanauki.pl/articles/133871.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
wodór
silnik spalinowy o zapłonie iskrowym
hydrogen
SI combustion engine
Opis:
W artykule zaprezentowano wyniki badań silnika o zapłonie iskrowym zasilanego wodorem. Przedstawiono koncepcję systemu zasilania wodorem oraz cel i metodykę przeprowadzonych pomiarów. Uzyskane wyniki porównano do wyników badań prowadzonych podczas zasilania silnika gazem ziemnym.
The results of the investigations of SI engine fuelled with hydrogen heve been presented in article. The idea of hydrogen feeding system and the aim and methodology of carred out measurement have been also described. Obtained results have been compared to the results of tests carried out during natural gas feeding of the some engine.
Źródło:
Combustion Engines; 2013, 52, 3; 1042-1048
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrogen as fuel in operation of internal combustion engines
Autorzy:
Kruczyński, S.
Ślęzak, M.
Gis, W.
Powiązania:
https://bibliotekanauki.pl/articles/242013.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
exhaust emission
ecology
hydrogen
engines
vehicles
Opis:
Hydrogen internal combustion engines (HICE) are presently the subject of numerous R&D projects. For hydrogen fuelling mainly, spark-ignition engines are adapted but it is also possible to adjust self-ignition engines. Self-ignition engines may be fuelled only with dual-fuels and usually demonstrate an oversized level of compression ratio requiring reduction because of engine knocking, whereas spark-ignition engines – on the contrary feature an undersized level of compression ratio that needs to be increased to ensure an effective combustion process. Hydrogen may be used also for gasoline dual-fuel engines. Hydrogen utilization as diesel engine fuel should be considered depending on the type of diesel cycle: 1.The use of hydrogen alone or as an addition to gasoline or LPG and methane in spark-ignition engines; 2.The use of hydrogen as an addition to diesel oil in self-ignition engines. In the paper are presented the review of the literature on the use only of hydrogen as a fuel or only of the additionof hydrogen to hydrocarbon fuels in engines with spark ignition and diesel. Have been studied combustion process, generation of heat and power, and efficiency of the engine. Have been evaluated opportunities to reduce harmful emissions. Have been evaluated possibilities of using hydrogen as a fuel for both type of engines. In the paper are presented the review use hydrogen as a fuel for vehicles with fuel cells too.
Źródło:
Journal of KONES; 2016, 23, 4; 237-244
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development project of a hydrogen fuelled internal combustion engine for heavy duty truck - outline and preliminary test
Autorzy:
Sato, Y.
Yanai, T.
Goto, Y.
Powiązania:
https://bibliotekanauki.pl/articles/246354.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engine
hydrogen engine
direct injection
NOx emission
NOx reduction catalyst
Opis:
The hydrogen fuelled internal combustion engine represent a promising solution to the issues of global warming, fossil fuel break point and environmental protection. The development of a hydrogen fuelled internal combustion engine for heavy-duty truck has been being carried out at Hydrogen Energy Research Centre (HERC) of Musashi Institute of Technology and National Traffic Safety and Environment Laboratory (NTSEL) since FY 2005 in the Next-Generation, Low-Emission Vehicle Development - Practical Implementation Project (EFV21) of Ministry of Land, Infrastructure and Transport (MLIT). As the most important key technology, the development of the common-rail type electronic high pressure hydrogen injectors is performed. Now the development of a hydrogen fuelled engine with 6 cylinders, the total displacement of 7.7 litters, direct injection and spark ignition is about to start. In this paper, the development concept, the characteristics of the injectors, some performance in the engine output power and the effects of nox reduction catalyst ever obtained experimentally by using a single cylinder engine are demonstrated.
Źródło:
Journal of KONES; 2007, 14, 3; 543-549
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of a new concept of hydrogen supply for a spark-ignition engine
Autorzy:
Brzeżański, Marek
Rodak, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/132844.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
hydrogen
combustion engine
direct injection
wodór
silnik spalinowy
wtrysk bezpośredni
Opis:
The article presents the results of conceptual and research works of an internal combustion engine adapted for hydrogen supply. The engine was equipped with a direct injection of hydrogen into the combustion chamber, allowing the control of the heat release rate. The developed concept of the power supply system and the fuel injection strategy were presented. Initial results of bench tests were also presented.
Źródło:
Combustion Engines; 2019, 58, 3; 140-143
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In-cylinder combustion analysis of a SI engine fuelled with hydrogen enriched compressed natural gas (HCNG) : engine performance, efficiency and emissions
Autorzy:
Juknelevičius, R.
Mehra, R.K.
Ma, F.
Szwaja, S.
Powiązania:
https://bibliotekanauki.pl/articles/245683.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
hydrogen
CNG
SI engine
combustion
emission
MFB
Opis:
The main objective of this study was to investigate the effect of hydrogen addition on spark ignition (SI) engine’s performance, thermal efficiency, and emission using variable composition hydrogen/CNG mixtures. The hydrogen was used in amounts of 0%, 20%, 40% by volume fraction at each engine speed and load. Experimental analysis was performed at engine speed of 1200 rpm, load of 120 Nm corresponding BMEP = 0.24 MPa, spark timing 26 CAD BTDC, and at engine speed of 2000 rpm, load of 350 Nm corresponding BMEP = 0.71 MPa, spark timing 22 CAD BTDC. The investigation results show that increasing amounts of hydrogen volume fraction contribute to shorten ignition delay time and decrease of the combustion duration, that also affect main combustion phase. The combustion duration analysis of mass fraction burned (MFB) was presented in the article. Decrease of CO2 in the exhaust gases was observed with increase of hydrogen amounts to the engine. However, nitrogen oxides (NOX) were found to increase with hydrogen addition if spark timing was not optimized according to hydrogen’s higher burning speed.
Źródło:
Journal of KONES; 2018, 25, 3; 253-260
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Combustion of RME – diesel and NExBTL – diesel blends with hydrogen in the compression ignition engine
Autorzy:
Juknelevičius, R.
Szwaja, S.
Pyrc, M.
Gruca, M.
Pukalskas, S.
Powiązania:
https://bibliotekanauki.pl/articles/247823.pdf
Data publikacji:
2018
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
hydrogen
RME
HVO
NExBTL
PRO Diesel
diesel fuel
CI engine
combustion
emission
Opis:
The article presents the test results of the single cylinder compression ignition engine with common rail injection system operating on biofuels and conventional diesel blends with hydrogen. Two types of liquid fuels were tested: blend of the 7% Rapeseed Methyl Ester (RME) with conventional diesel fuel and Neste Pro Diesel – blend of the 15% Hydrotreated Vegetable Oil (HVO), produced by Neste Oil Corporation with conventional diesel fuel. The purpose of this investigation was to examine the influence of the hydrogen addition to biofuels and diesel blends on combustion phases, autoignition delay, engine performance efficiency and exhaust emissions. Hydrogen fraction was changed within the range from 0 to 43% by energy. Hydrogen was injected into the intake manifold, where it created homogeneous mixture with air. Tests were performed at both fixed and optimal injection timings at low, medium, and nominal engine load. After analysis of the engine bench tests and simulation with AVL BOOST software, it was observed that increasing hydrogen fraction shortened the fuel ignition delay phase and it affected the main combustion phase. Moreover, decrease of carbon monoxide (CO), carbon dioxide (CO2) and smoke opacity was observed with increase of hydrogen amounts to the engine. However, increase of the nitrogen oxide (NOx) concentration in the engine exhaust gases was observed.
Źródło:
Journal of KONES; 2018, 25, 3; 261-274
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geometry of the Wankel rotary engine
Autorzy:
Drogosz, P.
Powiązania:
https://bibliotekanauki.pl/articles/243941.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
hydrogen engines
internal combustion engines
Wankel rotary engines
trochoids
Opis:
This article describes the basic principles for determining the geometry of Wankel rotary engines. An attempt is made to clarify if the characteristics of the rotary engine are such that the engine may be brought into more general use as an internal combustion hydrogen engine. An analysis of the data indicates that reorganizing the basic mathematical issues would be useful. Also the clarification of the names used to describe the basic curve characterizing the Wankel engine may be useful too. Now in such names and basic mathematical issues there are many differences generating many difficulties in comparison information comingfrom different sources. In this article one most convenient name and form of mathematical equation were chosen and described. The chosen name is the best for communication in the English language, but the other described names can be useful when comparing information from other European languages. This is the first time that the chosen form of mathematical equation is proposed to be used in accordance to construction of Wankel engines. Many other applications of the chosen form of mathematical equation ascertain proper and convenient use. The main advantages of this form of mathematical equation are applications of two main parameters: curve size parameter and dimensionless curve parameter. These two parameters decided about convenience in changing volume of internal combustion engines and comparisons of performance characteristic of different Wankel engines.
Źródło:
Journal of KONES; 2010, 17, 3; 69-74
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testing of initiation of rotating detonation process in hydrogen - air mixtures
Autorzy:
Balicki, W.
Irzycki, A.
Łukasik, B.
Snopkiewicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/247318.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
internal combustion engine
turbine engines
combustion chamber
rotating detonation
Opis:
The paper presents results of some research work done in the project, which aims to apply of an innovative combustion chamber to the turbine engine. Expected benefits of using of a new chamber in which classical deflagration type combustion process would be replaced with a detonation combustion type, arise from greater efficiency of FickettJacobs cycle, which corresponds to rotating detonation combustion, in comparison to "classical" Brayton cycle, characteristic of deflagration combustion. The presented task concerned fundamental research carried out on test bench designed and built at the Institute of Aviation in Warsaw. To initiate the detonation combustion in the fuel-air mixtures the ignition device of appropriately high energy is necessary. The released energy should be directed to the area where the mixture has proper constitution - preferably close to stoichiometric one. Four different ignition manners were examined in the course of research: electrical ignition system adapted from turbine engine (semiconductor spark plug), powder charge ignition (handgun cartridges), detonation primer ignition using pentryt, and high voltage discharge (plasma jet). The appearance of detonation type combustion was identified on the basis of combustion gas pressure run, measured using piezoelectric sensors at a frequency of 1 MHz.
Źródło:
Journal of KONES; 2012, 19, 2; 25-34
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of selected gaseous fuels on the combustion process in the Si engine
Autorzy:
Flekiewicz, M.
Kubica, G.
Powiązania:
https://bibliotekanauki.pl/articles/374902.pdf
Data publikacji:
2017
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
LPG
DME
methane
hydrogen
combustion
metan
wodór
spalanie
Opis:
This paper presents the results of SI engine tests, carried out for different gaseous fuels. The analysis carried out made it possible to define the correlation between fuel composition and engine operating parameters. The tests covered various gaseous mixtures: methane with hydrogen from 5% to 50% by volume and LPG with DME from 5% to 26% by mass. The first group, considered as low-carbon-content fuels can be characterized by low CO2 emissions. Flammability of hydrogen added in those mixtures realizes the function of the combustion process activator. Thus, hydrogen addition improves energy conversion by about 3%. The second group of fuels is constituted by LPG and DME mixtures. DME mixes perfectly with LPG, and differently than other hydrocarbon fuels, consisting of oxygen as well, which makes the stoichiometric mixture less oxygen demanding. In the case of this fuel an improvement in engine volumetric and overall engine efficiency has been noticed compared with LPG. For the 11% DME share in the mixture an improvement of 2% in the efficiency has been noticed. During the tests, standard CNG–LPG feeding systems have been used, which underlines the utility value of the research. The stand-test results have been followed by combustion process simulation including exhaust forming and charge exchange.
Źródło:
Transport Problems; 2017, 12, 3; 135-146
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 51

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