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Wyszukujesz frazę "Ziołkowski, P." wg kryterium: Autor

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    Wyświetlanie 1-7 z 7
    Tytuł:
    A thermodynamic analysis of a gas-steam turbine incorporating a full model of a spray – ejector condense
    Autorzy:
    Ziółkowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/175324.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    computational flow mechanics modelling
    two-phase ejector
    thermodynamic analysis
    numerical analysis
    Opis:
    The specific issues that occur in the mathematical modelling of a spray-ejector condenser have been presented. The results of a thermodynamic analysis of a steam-gas turbine cycle have been obtained by computational flow mechanics code. The main aim of the spray-ejector condenser is simultaneously condensing steam and compressing CO2 from the condensation pressure to about 100 kPa. Hence, the most important innovation of this steam-gas cycle emerges as the enhanced condensation, which is based on the nano-injection of cold water and a jet-powered compression of CO2 performed in the spray-ejector condenser.
    Źródło:
    Transactions of the Institute of Fluid-Flow Machinery; 2018, 139; 63-96
    0079-3205
    Pojawia się w:
    Transactions of the Institute of Fluid-Flow Machinery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Accuracy problem of modeling in a gas turbine cycle with heat regeneration according to Szewalski’s idea
    Autorzy:
    Ziółkowski, P.
    Piotrowski, R.
    Badur, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/175258.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    heat regeneration
    gas turbine
    thermodynamical analysis
    numerical analysis
    basic model vs numerical model
    computational flow mechanics (CMF)
    Opis:
    In this paper, authors undertook a problem of accuracy and exactness verification of some assumptions and calculation methods that are important in the 0D modeling. The computational flow mechanics (CFM) tools and basic calculations of gas turbine cycle with heat regeneration according to Szewalski’s idea have been done. Results and conclusions for this specific problem have been presented. Gas turbine cycle with heat regeneration according to Szewalski’s idea includes regeneration as same as it is now commonly employed in steam turbine cycles. Mentioned regeneration is enabled by adding to the simple cycle devices configuration of two regenerative heat exchangers and auxiliary compressor. That modification allows to obtain working medium circulation in closed cycle inside a basic cycle. Efficiency gain is dependent on extraction pressure and extraction mass flow rate.
    Źródło:
    Transactions of the Institute of Fluid-Flow Machinery; 2015, 129; 77-109
    0079-3205
    Pojawia się w:
    Transactions of the Institute of Fluid-Flow Machinery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling of a mixture flow of helium and methanol in thermocatalytic reactor and chemical reactions on the intermethallic phase of Ni3A
    Autorzy:
    Ziółkowski, P.
    Stajnke, M.
    Jóźwik, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/175269.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CFD modeling
    numerical analysis
    methanol decomposition
    catalytic reactions
    Opis:
    In this paper, the specified issues that occurs in the numerical modeling of complex phenomena of chemical reactions intensified with forced fluid flow in the thermocatalytic reactor channels on the intermetallic phase of Ni3Al are presented. Based on the example of flowing mixture containing helium contaminated by methanol in a horizontal microchannels, heated from the outside, received results of the experiment were shown and compared with computational fluid dynamize calculations. However, standard version of commercial code have been expanded by user definedfunctions. These extensionstransformed the calculation mechanisms and algorithms of computational fluid dynamize codes adapting them for the micro-flow cases and increased chemical reactions rate on an interphase between fluid and solid. Results obtained on the way of numerical calculations were compared with experimental data receiving satisfactory compliance.
    Źródło:
    Transactions of the Institute of Fluid-Flow Machinery; 2017, 138; 33-73
    0079-3205
    Pojawia się w:
    Transactions of the Institute of Fluid-Flow Machinery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Increase of power and efficiency of the 900 MW supercritical power plant through incorporation of the ORC
    Autorzy:
    Ziółkowski, P.
    Mikielewicz, D.
    Mikielewicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/239975.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    supercritical power plant
    ORC
    regeneration
    thermodynamic analysis
    numerical analysis
    CFM
    nadkrytyczny blok węglowy
    regenerowanie
    analiza termodynamiczna
    analiza numeryczna
    Opis:
    The objective of the paper is to analyse thermodynamical and operational parameters of the supercritical power plant with reference conditions as well as following the introduction of the hybrid system incorporating ORC. In ORC the upper heat source is a stream of hot water from the system of heat recovery having temperature of 90˚C, which is additionally aided by heat from the bleeds of the steam turbine. Thermodynamical analysis of the supercritical plant with and without incorporation of ORC was accomplished using computational flow mechanics numerical codes. Investigated were six working fluids such as propane, isobutane, pentane, ethanol, R236ea and R245fa. In the course of calculations determined were primarily the increase of the unit power and efficiency for the reference case and that with the ORC.
    Źródło:
    Archives of Thermodynamics; 2013, 34, 4; 51-71
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Revalorization of the Szewalski binary vapour cycle
    Autorzy:
    Ziółkowski, P.
    Hernet, J.
    Badur, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/240007.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    binary cycle
    binary plant
    ORC
    thermodynamical analysis
    numerical analysis
    computational flow mechanics
    cykl binarny
    analiza termodynamiczna
    analiza numeryczna
    mechanika przepływu
    Opis:
    The aim of the paper is to revalorizate of the Szewalski binary vapour cycle by analysing thermodynamical and operational parameters of this cycle. This was carried out by accessible numerical computational flow mechanics codes using the step-by-step modeling of separate elements. The binary vapour cycle is providing steam as the working fluid in the high temperature part of the cycle, while another fluid - a low boiling point fluid of low specific volume - as the working substance substituting conventional steam over the temperature range represented by the low pressure steam expansion. The steam cycle for reference conditions has been assumed. Four working fluids in the low temperature part of the binary cycle such as propane, isobutane, ethanol and ammonia have been investigated.
    Źródło:
    Archives of Thermodynamics; 2014, 35, 3; 225-249
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamic analysis of the double Brayton cycle with the use of oxy combustion and capture of CO2
    Autorzy:
    Ziółkowski, P.
    Zakrzewski, W.
    Badur, J.
    Kaczmarczyk, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/240714.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Inverse Brayton cycle
    Brayton cycle
    gas-steam unit
    oxy combustion
    CCS
    thermodynamic analysis
    numerical analysis
    CFM
    Obieg Braytona-Joule'a
    blok gazowo-parowy
    spalanie w tlenie
    analiza termodynamiczna
    analiza numeryczna
    Opis:
    In this paper, thermodynamic analysis of a proposed innovative double Brayton cycle with the use of oxy combustion and capture of CO2, is presented. For that purpose, the computation flow mechanics (CFM) approach has been developed. The double Brayton cycle (DBC) consists of primary Brayton and secondary inverse Brayton cycle. Inversion means that the role of the compressor and the gas turbine is changed and firstly we have expansion before compression. Additionally, the workingfluid in the DBC with the use of oxy combustion and CO2 capture contains a great amount of H2O and CO2, and the condensation process of steam (H2O) overlaps in negative pressure conditions. The analysis has been done for variants values of the compression ratio, which determines the lowest pressure in the double Brayton cycle.
    Źródło:
    Archives of Thermodynamics; 2013, 34, 2; 23-38
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Power enhancement of the Brayton cycle by steam utilization
    Autorzy:
    Jesionek, K.
    Chrzęszczyk, A.
    Ziółkowski, P.
    Badur, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/240390.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    analiza numeryczna
    obieg Barytona
    obieg Chenga
    układ gazowo-parowy
    Brayton cycle
    Cheng cycle
    CHP
    gas-steam unit
    numerical analysis
    Opis:
    The paper presents thermodynamic analysis of the gas-steam unit of the 65 MWe combined heat and power station. Numerical analyses of the station was performed for the nominal operation conditions determining the Brayton and combined cycle. Furthermore, steam utilization for the gas turbine propulsion in the Cheng cycle was analysed. In the considered modernization, steam generated in the heat recovery steam generator unit is directed into the gas turbine combustion chamber, resulting in the Brayton cycle power increase. Computational flow mechanics codes were used in the analysis of the thermodynamic and operational parameters of the unit.
    Źródło:
    Archives of Thermodynamics; 2012, 33, 3; 39-50
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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