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Zeszyty Naukowe Politechniki Świętokrzyskiej. Mechanika
2000 Z. 72 131-143
PL W pracy omówiono genezę poznania, teorię i praktykę zużycia wodorowego części maszyn., jak również technologiczne metody przeciwdziałania tej katastrofalnej postaci eksploatacyjnego niszczenia tworzyw metalowych. Przedstawiono wyniki badań porównawczy odporności na objętościowe nawodorowanie próbek[...]
EN The subject of the paper is the hydrogen's behaviour in the field of surface engineering, as well as during friction both in dry and lubricated frictional couples. The recently discovered phenomena, namely: the blocking of hydrogen diffusion by nitrided layers, selflubrication by hydrogen and the ac[...]
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Prace Naukowe Politechniki Warszawskiej. Mechanika
1999 z. 181 97-106
PL Niniejszy artykuł przedstawia jedną z możliwych technologii wykorzystania wodoru jako paliwa dla systemów wytwarzania energii, zaproponowaną w japońskim programie badawczym. Program ten ma za zadanie stworzenie globalnej sieci energetycznej z wykorzystaniem wodoru jako wtórnego nośnika czystej energ[...]
EN This paper introduces one of the utilisation of the hydrogen as a power systems` fuel in Japanese program, which has been progressed to establish the global energy network by using hydrogen as a secondary clean energy. And it introduces semi-closed gas turbine systems with steam recirculation. They[...]
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Journal of KONES
EN 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 igni[...]
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Journal of KONES
EN The experimental results of combustion pressure processing from a supercharged spark ignition (SI) engine that was running on hydrogen are exposed in the paper. Hydrogen was delivered in two ways by an injector and mixer installed in an intake port. In-cylinder pressure while combusting hydrogen was[...]
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Journal of KONES
EN The paper describes correlation between combustion knock intensity and combustion rate calculated as the heat release rate from combustion pressure traces of a hydrogen fuelled spark ignited engine. Unlike a gasoline spark ignited (SI) engine, the hydrogen fuelled engine can easily generate knock du[...]
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Journal of KONES
EN Review is made of the positive features and the current limitations associated with the use of hydrogen as a spark ignition engine fuel. It is shown that hydrogen has excellent prospects to achieve very satisfactory performance in engine applications that may be superior in many aspects to those wit[...]
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Journal of KONES
EN 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 [...]
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Journal of KONES
EN It is known that Exhaust Gas Recirculation (EGR) can be successfully applied not only for reducing NOx content in exhaust gases but also for reduction of combustion knock in SI engines. From this point of view, EGR can be particularly effective for knock elimination in the hydrogen reciprocating eng[...]
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Journal of KONES
EN Combustion knock in a hydrogen fuelled engine has many different characteristic as compared to knock occurring in the gasoline engine. This is a result of differences in the gasoline and hydrogen combustion mechanisms which lead to knock. Hydrogen as the engine fuel is able to produce combustion kno[...]
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Journal of KONES
EN Experimental results of combusting three different syngases in an internal combustion (IC) spark ignition engine are presented in this paper. The syngases used for tests varied each from the other with hydrogen content, which was of 10,15 and 60%. Other combustible gases as CO and CH4 were also chan[...]
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Acta Mechanica et Automatica
EN This paper deals with an investigation of temperature and hydrogen concentration influence on Ignalina NPP RBMK-1500 unit 2 reactor fuel channel tube material - Zr-2.5Nb zirconium alloy (TMT-2) mechanical and fracture toughness characteristics. Two types of specimens were used in this study - tensil[...]
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Materials Science Poland
2009 Vol. 27, No. 2 595--601
EN The interaction between H atoms and a Fe50Ni50 alloy containing vacancies was studied. The energy of the system was calculated by the atom superposition and electron delocalization molecular orbital (ASED-MO) method. The electronic structure was studied using the concept of density of states (DOS) a[...]
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Przemysł Chemiczny
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Opto - Electronics Review
EN We studied relaxation of defects formed during fast quenching in low pressure chemical vapour deposition (LPCVD) amorphous silicon with different hydrogen concentrations (from 0.05 at.% to 15 at.%) doped with boron or phosphorous (2 at.%). Results of measurement of dark conductivity after quenching [...]
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Archivum Combustionis
2010 Vol. 30 nr 3 247-260
EN Selected problems connected to the use of fuel cells in energy-system are introduced in the paper. The studies concerning the system for electricity and heat generation, consisting of a photovoltaic panels, hydrogen generators and PEM-type fuel cell are presented. For the generation of hydrogen with[...]
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Journal of KONES
EN In the past, many have considered the production and use of hydrogen, assuming that it is just another gaseous fuel and can be handled much like natural gas in todays energy economy. With this study we present an analysis of the energy required to operate an elemental hydrogen economy, with particul[...]
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Journal of KONES
EN A sustainable energy world will be base d on renewable energy sources. With the exception of biomass, all natural energy contributions will be harvested as electricity. Electric power will replace fossil carriers as the "lead currency" in the energy market. Today, coal, oil and natural gas are upgra[...]
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Advances in Materials Science
EN The aim of this work is to propose a model to explain the microscopic mechanism of Stress Corrosion Cracking (SCC) in PWR water of stainless steels or nickel base alloys. Molecular Dynamics (DM) simulations on bicrystal or Ni have been carried out with hydrogen at the grain boundary (GB) (Eta 5). Tw[...]
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Advances in Materials Science
EN In order to highlight hydrogen effects on the plasticity, the slip morphology after straining (under tension up to 4% of plastic strain in ambient air) of hydrogenated (at 135 wt.ppm) and non-hydrogenated 3161 stainless steel polycrystals was compared. A statistical analysis of both slip band spacin[...]
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Zeszyty Naukowe. Mechanika / Politechnika Opolska
EN Nitriding by ammonia synthesis gas causes a modification of the carbides, a decarburization and sensitization to hydrogen corrosion within a relatively thin metal layer near to the inner surface of the converters. Subsequently a sensitization to hydrogen attack occurs due to the reaction of diffusin[...]
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