@article{MTMT:34037353, title = {Hidrogénbekeverési kísérletek energiatermelés céljára gázmotorokban [Hydrogen blending tests for power generation in gas engines]}, url = {https://m2.mtmt.hu/api/publication/34037353}, author = {Dobi-Szakál, Gyöngy and Szalontai, Péter and Lukács, Kristóf László and Meggyes, Attila and Bereczky, Ákos}, journal-iso = {MAGYAR ENERGETIKA}, journal = {MAGYAR ENERGETIKA}, volume = {30}, unique-id = {34037353}, issn = {1216-8599}, year = {2023}, pages = {2-6}, orcid-numbers = {Meggyes, Attila/0000-0002-8265-255X; Bereczky, Ákos/0000-0003-0728-2445} } @article{MTMT:34512551, title = {Oxy-fuel tüzelés vizsgálata gázmotor alapú P2G rendszerű metán előállító technológia számára}, url = {https://m2.mtmt.hu/api/publication/34512551}, author = {Lukács, Kristóf László and Hujber, Ottó and Bereczky, Ákos}, journal-iso = {ENERGIAGAZDÁLKODÁS}, journal = {ENERGIAGAZDÁLKODÁS}, volume = {64}, unique-id = {34512551}, issn = {0021-0757}, year = {2023}, pages = {2-7}, orcid-numbers = {Bereczky, Ákos/0000-0003-0728-2445} } @article{MTMT:34023883, title = {Belsőégésű motorokkal kapcsolatos kutatások az Energetikai Gépek és Rendszerek Tanszéken}, url = {https://m2.mtmt.hu/api/publication/34023883}, author = {Lukács, Kristóf László and Meggyes, Attila and Bereczky, Ákos}, journal-iso = {ENERGIAGAZDÁLKODÁS}, journal = {ENERGIAGAZDÁLKODÁS}, volume = {64}, unique-id = {34023883}, issn = {0021-0757}, year = {2023}, pages = {20-23}, orcid-numbers = {Meggyes, Attila/0000-0002-8265-255X; Bereczky, Ákos/0000-0003-0728-2445} } @inproceedings{MTMT:32792951, title = {1-butanol tüzelőanyag és vizsgálata}, url = {https://m2.mtmt.hu/api/publication/32792951}, author = {Bereczky, Ákos and Lukács, Kristóf László and Szabados, György}, booktitle = {XXX. Nemzetközi Gépészeti Konferencia - OGÉT 2022}, unique-id = {32792951}, year = {2022}, pages = {195-200}, orcid-numbers = {Bereczky, Ákos/0000-0003-0728-2445; Szabados, György/0000-0001-6340-0069} } @CONFERENCE{MTMT:32792932, title = {Különböző gázolaj-biodízel-metanol keverékek dízelmotor üzemére gyakorolt hatásának vizsgálata}, url = {https://m2.mtmt.hu/api/publication/32792932}, author = {Szabados, György and Žaglinskis, Justas and Lukács, Kristóf László and Bereczky, Ákos}, booktitle = {XXX. Nemzetközi Gépészeti Konferencia - OGÉT 2022}, unique-id = {32792932}, year = {2022}, pages = {250-255}, orcid-numbers = {Szabados, György/0000-0001-6340-0069; Bereczky, Ákos/0000-0003-0728-2445} } @article{MTMT:32151958, title = {Investigating Combustion Process of N-Butanol-Diesel Blends in a Diesel Engine with Variable Compression Ratio}, url = {https://m2.mtmt.hu/api/publication/32151958}, author = {Szabados, György and Lukács, Kristóf László and Bereczky, Ákos}, doi = {10.3390/cleantechnol3030037}, journal-iso = {CLEAN TECHNOL}, journal = {CLEAN TECHNOLOGIES}, volume = {3}, unique-id = {32151958}, abstract = {The search for alternative fuels for internal combustion engines is ongoing. Among the alternatives, plant-based fuels can also be mentioned. Alcohol is not a common fuel for diesel engines because the physical and chemical properties of the alcohols are closer to those of gasoline. In our research, the combustion properties of diesel-n-butanol mixtures have been investigated to obtain results on the effect of butanol blending on combustion. Among the combustion properties, ignition delay, in-cylinder pressure, and heat release rate can be mentioned. They have been observed under different compression conditions on an engine on which the compression ratio can be adjusted. The method used was a quite simple one, so the speed of the engine was set to a constant 900 rpm without load, while three compression ratios (19.92, 15.27, and 12.53) were adjusted with a fuel flow rate of 13 mL/min and the pre-injection angle of 18° BTDC. Blending butanol into the investigated fuel does not significantly affect maximal values of indicated pressure, while much more effect on the pressure rising rate can be detected. Furthermore, heat release rate and ignition delay increased at every compression ratio investigated. Despite the low blending rates of butanol in the mixtures, butanol significantly affects the combustion parameters, especially at high compression ratios.}, year = {2021}, eissn = {2571-8797}, pages = {618-628}, orcid-numbers = {Szabados, György/0000-0001-6340-0069; Bereczky, Ákos/0000-0003-0728-2445} } @{MTMT:32034747, title = {Combustion and Emission Analyses of a Diesel Engine Running on Blends with Methanol}, url = {https://m2.mtmt.hu/api/publication/32034747}, author = {Szabados, György and Žaglinskis, Justas and Lukács, Kristóf László and Bereczky, Ákos}, booktitle = {Methanol}, doi = {10.1007/978-981-16-1280-0_6}, unique-id = {32034747}, abstract = {The ambient air around us is continuously and increasingly loaded and polluted through emission that comes from different sectors, especially from the transportation sector. This fact is due to the growing energy consumption in the transport sector which is forecasted worldwide in the nearer and far future. Bio-based energy may be consumed in an increasing way in the sector until 2050. Methanol, and if it is produced on bio-basis, called bio-methanol, is the simplest alcohol. Methanol costs less than other automotive alternative alcohols, for example, ethanol or butanol, so it may be among the cheapest technical alcohols. As for methanol’s structure, it contains 30% more inherent oxygen on a molecular base than fossil diesel. The aim of this research is to give comprehensive overview about the methanol’s effect on the combustion and emission properties of a diesel engine. During the analyses of combustion and emission characteristics the most relevant parameters have been included. The study also contains calculations regarding theoretical combustion (oxidation process) of the different hydrogen-carbons. A rarely investigated parameter, O2 consumption or demand is also in focus, besides CO2 emission and intensity throughout the calculations. For our experimental test series, diesel fuel was the base fuel and it has been mixed with biodiesel first, and this mixture has been further blended with methanol. Methanol’s theoretical contribution to the diesel–biodiesel blend’s O2 consumption and CO2 emission is a small amount. Engine’s external parameters have not changed significantly if it is running on blend with methanol. Methanol has rather affected the combustion and emission properties of the engine more significantly. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.}, year = {2021}, pages = {141-172}, orcid-numbers = {Szabados, György/0000-0001-6340-0069; Žaglinskis, Justas/0000-0002-1541-8464; Bereczky, Ákos/0000-0003-0728-2445} } @article{MTMT:32099342, title = {Engine Vibration Data Increases Prognosis Accuracy on Emission Loads: A Novel Statistical Regressions Algorithm Approach for Vibration Analysis in Time Domain}, url = {https://m2.mtmt.hu/api/publication/32099342}, author = {Žvirblis, Tadas and Vainorius, Darius and Matijošius, Jonas and Kilikevičienė, Kristina and Rimkus, Alfredas and Bereczky, Ákos and Lukács, Kristóf László and Kilikevičius, Artūras}, doi = {10.3390/sym13071234}, journal-iso = {SYMMETRY-BASEL}, journal = {SYMMETRY (BASEL)}, volume = {13}, unique-id = {32099342}, year = {2021}, eissn = {2073-8994}, pages = {1234-1254}, orcid-numbers = {Matijošius, Jonas/0000-0001-6006-9470; Rimkus, Alfredas/0000-0001-8995-7180; Bereczky, Ákos/0000-0003-0728-2445; Kilikevičius, Artūras/0000-0002-4039-7300} } @CONFERENCE{MTMT:32632198, title = {Investigation of methanol utilization in Ci engines}, url = {https://m2.mtmt.hu/api/publication/32632198}, author = {Bereczky, Ákos and Lukács, Kristóf László and Khan, Zoraze}, booktitle = {Horizons of Railway Transport 2018, 10th Year of International Scientific Conference}, doi = {10.1051/matecconf/201823500036}, unique-id = {32632198}, abstract = {The decrease in the fossil fuel resources and more rigid emission standards make the necessity to look for new fuels and technologies. One of the possible fuels can be the different alcohols. The oxygen content of the alcohols can improve the combustion process and reduce the emission rates of incomplete combustion products. The blending methanol (M) and ethanol (E) with diesel fuel is limited by separation. This article shows the research results and analysis of two typical solutions. First are blends of stabilized rape seed methyl ester (RME) to prevent the phase separation. The tests are carried out on a conventional TDI engine (VW 1Z) at different speeds and loads. Experimental results indicate that the addition of 10% methanol to 80% Diesel and 30% of FAME blend increased the unburned hydrocarbon (THC) with 60%, decreased CO emission with near 4% and the particulate emission (PM) with near 30%, the NOx emissions were near the same. The other technology is the dual fuel method. In this case, different amount of methanol is injected into the intake manifold. The tests are carried out with a conventional DI engine (IVECO AIFO 8031) at constant speeds and different loads and energy ratios. Experimental results indicate that the increase of energy ratio of the methanol at full load decreased NOx emission with up to 60% and the particulate emission (PM) up to 90%, while the CO and THC emissions increased extremely mainly at part loads. © 2018 The Authors, published by EDP Sciences.}, year = {2018}, orcid-numbers = {Bereczky, Ákos/0000-0003-0728-2445} } @{MTMT:31374043, title = {n-Butanol-Diesel (D2) Blend Fired in a Turbo-Charged Compression Ignition Engine: Performance and Combustion Characteristics}, url = {https://m2.mtmt.hu/api/publication/31374043}, author = {Lennox, Siwale and Lukács, Kristóf László and Török, Ádám and Bereczky, Ákos and Mbarawa, Makame and Penninger, Antal and Kolesnikov, Andrei}, booktitle = {Improvement Trends for Internal Combustion Engines}, doi = {10.5772/intechopen.72879}, unique-id = {31374043}, year = {2018}, pages = {37-50}, orcid-numbers = {Török, Ádám/0000-0001-6727-1540; Bereczky, Ákos/0000-0003-0728-2445} }