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Wyszukujesz frazę "Jaworski, T" wg kryterium: Autor

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    Wyświetlanie 1-12 z 12
    Tytuł:
    Experimental and theoretical modeling of waste combustion in a chamber with a moving grate
    Autorzy:
    Jaworski, T. J.
    Pikoń, K.
    Kajda-Szcześniak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/185559.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    waste
    combustion
    physicochemical properties
    emission of gas combustion products
    quantitative evaluation indicators
    marnotrawstwo
    spalanie
    właściwości fizykochemiczne
    Opis:
    The work contains a description of a developed experimental and theoretical method of modeling of solid waste combustion in a device equipped with a moving grate and capability to optimize the work of waste incineration plant. Implementation of this issue was based on results of experimental studies made on a laboratory scale boiler. This was possible by defining and testing indicators of quantitative assessment of combustion such as: reaction front rate, ignition rate, the rate of combusted mass loss and the heat release rate. These indicators as measurable "criteria indicators" allow transfer of parameters from a laboratory-scale unit, working in the transient egime into an industrial full scale grate device working continuously in stable determined conditions. This allows for wide optimization possibilities in the operation of a waste incineration plant, in particular the combustion chamber, equipped with a moving grate system.
    Źródło:
    Chemical and Process Engineering; 2018, 39, 1; 3-14
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Capability Assessment of Robotized System for Casting Measurement
    Autorzy:
    Jaworski, J.
    Kluz, R.
    Trzepieciński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/380596.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mechanization
    automatization
    casting process
    quality control
    casting measurement
    mechanizacja odlewnictwa
    automatyzacja odlewnictwa
    proces odlewania
    kontrola jakości
    pomiar odlewania
    Opis:
    Assurance of required casting quality is an important element of the manufacturing process. The control should be realized fast, accurately and cheap. These requirements may be fulfilled by application of an industrial robot to realize the measuring process. In the article the methodology of capability assessment of robotized system to control specified casting feature based on analysis of repeatability and reproducibility is presented. It is demonstrated that industrial robots produced serially have the accuracy allowing for their application to control process of both die-casting and pressure casting dimensions.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1 spec.; 57-60
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Increasing the Capability of the Process of Placing Inserts in Foundry Moulds
    Autorzy:
    Jaworski, J.
    Kluz, R.
    Trzepieciński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/381680.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mechanization of casting process
    automatisation of casting process
    foundry robotic automation
    product development
    process capability indices
    mechanizacja procesu odlewniczego
    automatyzacja procesu odlewniczego
    zrobotyzowana automatyzacja procesów
    rozwój produktu
    Opis:
    This article discusses the issue of the preparation of the foundry moulds with the use of an industrial robot. The methodology is presented for the determination of the process capacity index for placing inserts with flat and cylindrical faces. On the basis of the relationships developed, the process capability indices were determined at various points in the workspace, which are characterised by different values of the repeatability positioning error. It was shown that the value of the process capacity index can be increased by the selection of a suitable location for the process of placing the inserts in the workspace. It should also be noted that the value of the process's capability index depends on the selection of the place in the robot workspace where the process is carried out. Implementation of the joining process at an analysed point in the robot workspace leads to an increase of the process capability index MCp for inserts with flat faces up to 1.1 (+4.5%) and for inserts with cylindrical faces up to 1.3. This results in an increase of 13% to a level corresponding to the global standard for process reliability (MCp = 1.33).
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 187-190
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Neural Networks into Prediction of Qualitative Capability of the Preparation Process of Casting Moulds
    Autorzy:
    Jaworski, J.
    Kluz, R.
    Trzepieciński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/382680.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    automation of casting process
    robotization of casting process
    robot selection
    automatyzacja procesu odlewania
    robotyzacja procesu odlewania
    Opis:
    In the article the problem of assurance of qualitative capability of the preparation process of casting moulds using artificial neural net-works is presented. Using STATISTICA Neural Networks a set of the best networks is found. Obtained results of neural modeling were compared with the results of experimental investigations and classical mathematical modeling. The appropriate architecture of the neural network is chosen that predicts the quality capability of the preparation process of casting moulds with the high precision.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1 spec.; 9-12
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Heat Treatment on Content of the Carbide Phases in the Microstructure of High-Speed Steel
    Autorzy:
    Jaworski, J.
    Kluz, R.
    Trzepieciński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/379617.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    heat treatment
    metallography
    carbide phase
    high-speed steel
    microstructure
    obróbka cieplna
    metalografia
    węglik
    stal szybkotnąca
    mikrostruktura
    Opis:
    This article presents the results of investigations of the effect of heat treatment temperature on the content of the carbide phase of HS3-1-2 and HS6-5-2 low-alloy high-speed steel. Analysis of the phase composition of carbides is carried out using the diffraction method. It is determined that with increasing austenitising temperature, the intensification of dissolution of M6C carbide increases. As a result, an increase in the grain size of the austenite and the amount of retained austenite causes a significant reduction in the hardness of hardened steel HS3-1-2 to be observed. The results of diffraction investigations showed that M7C3 carbides containing mainly Cr and Fe carbides and M6C carbides containing mainly Mo and W carbides are dissolved during austenitisation. During austenitisation of HS3-1-2 steel, the silicon is transferred from the matrix to carbides, thus replacing carbide-forming elements. An increase in a degree of tempering leads to intensification of carbide separation and this process reduce the grindability of tested steels.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 59-62
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Stability of Fabrication System of Casting Parts
    Autorzy:
    Jaworski, J.
    Kluz, R.
    Trzepieciński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/380195.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fabrication
    process stability
    SIX Sigma methodology
    System of Casting Parts
    wytwarzanie
    stabilność procesu
    system odlewania części
    metoda SIX Sigma
    Opis:
    The article presents the results of stability analysis of castings manufacturing system. For the analysis, the Six Sigma DMAIC (Define- Measure-Analyse-Improve-Control) methodology has been applied. The studies demonstrated the ability to reduce the variance of the process, and therefore the quantity of defects.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1 spec.; 5-8
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assurance of Quality Capability of the Preparation Process of Casting Moulds
    Autorzy:
    Jaworski, J.
    Kluz, R.
    Trzepieciński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/380422.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    automation
    robotization
    casting process
    robot selection
    automatyzacja
    robotyzacja
    proces odlewniczy
    wybór robota
    Opis:
    The article investigates the problem of assurance of the required capability of robotized process of placing of steel inserts in a casting die. Dependence enabling the determination of the repeatability positioning of the robot, which has been verified in experimental tests is presented. A method to determine the most beneficial location in a workspace of the assembly stand ensuring the highest value of multivariate quality capability index MCp is also proposed. In the final part, the results are discussed and conclusions are formulated.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1 spec.; 61-64
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on Accuracy of Automatic System for Casting Measuring
    Autorzy:
    Jaworski, J.
    Kluz, R
    Trzepieciński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/381307.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    automation in foundry
    robotics in foundry
    product development
    mechanization of casting processes
    automation of casting processes
    quality control of castings
    measurement systems
    automatyzacja w odlewni
    robotyka w odlewni
    rozwój produktów
    mechanizacja procesów odlewniczych
    automatyzacja procesów odlewniczych
    kontrola jakości odlewów
    systemy pomiarowe
    Opis:
    Ensuring the required quality of castings is an important part of the production process. The quality control should be carried out in a fast and accurate way. These requirements can be met by the use of an optical measuring system installed on the arm of an industrial robot. In the article a methodology for assessing the quality of robotic measurement system to control certain feature of the casting, based on the analysis of repeatability and reproducibility is presented. It was shown that industrial robots equipped with optical measuring systems have the accuracy allowing their use in the process of dimensional control of castings manufactured by lost-wax process, permanent-mould casting, and pressure die-casting.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 49-54
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computational Fluid Dynamics calculation of a planar solid oxide fuel cell design running on syngas
    Autorzy:
    Pianko-Oprych, P.
    Zinko, T.
    Jaworski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/184992.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    planar Solid Oxide Fuel Cells
    Computational Fluid Dynamics
    syngas
    płaskie ogniwa paliwowe z tlenkiem stałym
    obliczeniowa dynamika płynów
    syngaz
    Opis:
    The present study deals with modelling and validation of a planar Solid Oxide Fuel Cell (SOFC) design fuelled by gas mixture of partially pre-reformed methane. A 3D model was developed using the ANSYS Fluent Computational Fluid Dynamics (CFD) tool that was supported by an additional Fuel Cell Tools module. The governing equations for momentum, heat, gas species, ion and electron transport were implemented and coupled to kinetics describing the electrochemical and reforming reactions. In the model, the Water Gas Shift reaction in a porous anode layer was included. Electrochemical oxidation of hydrogen and carbon monoxide fuels were both considered. The developed model enabled to predict the distributions of temperature, current density and gas flow in the fuel cell.
    Źródło:
    Chemical and Process Engineering; 2017, 38, 4; 513-521
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Three-dimensional computational fluid dynamics modelling of a proton exchange membrane fuel cell with a serpentine micro-channel design
    Autorzy:
    Zinko, T.
    Jaworski, Z.
    Pianko-Oprych, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/185221.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Proton Exchange Membrane Fuel Cells
    Computational Fluid Dynamics
    flow field design
    polarisation curve
    obliczeniowa dynamika płynów
    pole przepływu
    krzywa polaryzacji
    Opis:
    The aim of this paper was to demonstrate the feasibility of using a Computational Fluid Dynamics tool for the design of a novel Proton Exchange Membrane Fuel Cell and to investigate the performance of serpentine micro-channel flow fields. A three-dimensional steady state model consisting of momentum, heat, species and charge conservation equations in combination with electrochemical equations has been developed. The design of the PEMFC involved electrolyte membrane, anode and cathode catalyst layers, anode and cathode gas diffusion layers, two collectors and serpentine micro-channels of air and fuel. The distributions of mass fraction, temperature, pressure drop and gas flows through the PEMFC were studied. The current density was predicted in a wide scope of voltage. The current density – voltage curve and power characteristic of the analysed PEMFC design were obtained. A validation study showed that the developed model was able to assess the PEMFC performance.
    Źródło:
    Chemical and Process Engineering; 2018, 39, 2; 143--154
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A review of the numerical studies on planar and tubular solid oxide fuel cells within four EU projects of the 7th framework programme
    Autorzy:
    Pianko-Oprych, P.
    Jaworski, Z.
    Zinko, T.
    Palus, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/185086.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Solid Oxide Fuel Cell
    stack
    fuel cell system
    Computational Fluid Dynamics
    CFD
    Finite Element Method
    FEM
    modelling
    process simulation
    ogniwo paliwowe z tlenkiem stałym
    system ogniw paliwowych
    obliczeniowa dynamika płynów
    metoda elementów skończonych
    MES
    modelowanie symulacje procesu
    Opis:
    The paper addresses the issues of quantification and understanding of Solid Oxide Fuel Cells (SOFC) based on numerical modelling carried out under four European, EU, research projects from the 7FP within the Fuel Cell and Hydrogen Joint Undertaking, FCH JU, activities. It is a short review of the main projects’ achievements. The goal was to develop numerical analyses at a single cell and stack level. This information was integrated into a system model that was capable of predicting fuel cell phenomena and their effect on the system behaviour. Numerical results were analysed and favourably compared to experimental results obtained from the project partners. At the single SOFC level, a static model of the SOFC cell was developed to calculate output voltage and current density as functions of fuel utilisation, operational pressure and temperature. At the stack level, by improving fuel cell configuration inside the stack and optimising the operation conditions, thermal stresses were decreased and the lifetime of fuel cell systems increased. At the system level, different layouts have been evaluated at the steady-state and by dynamic simulations. Results showed that increasing the operation temperature and pressure improves the overall performance, while changes of the inlet gas compositions improve fuel cell performance.
    Źródło:
    Chemical and Process Engineering; 2018, 39, 4; 377--393
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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