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    Wyświetlanie 1-11 z 11
    Tytuł:
    Thermodynamic evaluation of supercritical oxy-type power plant with high-temperature three-end membrane for air separation
    Autorzy:
    Kotowicz, J.
    Balicki, A.
    Michalski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/240116.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    oxy-combustion
    membrane technology
    air separation unit
    thermodynamic evaluation
    oxy-spalanie
    technologie membranowe
    separator powietrza
    ocena termodynamiczna
    Opis:
    Among the technologies which allow to reduce greenhouse gas emissions, mainly of carbon dioxide, special attention deserves the idea of 'zero-emission' technology based on boilers working in oxy-combustion technology. In the paper a thermodynamic analysis of supercritical power plant fed by lignite was made. Power plant consists of: 600 MW steam power unit with live steam parameters of 650°C/30 MPa and reheated steam parameters of 670°C/6 MPa; circulating fluidized bed boiler working in oxy-combustion technology; air separation unit and installation of the carbon dioxide compression. Air separation unit is based on high temperature membrane working in three-end technology. Models of steam cycle, circulation fluidized bed boiler, air separation unit and carbon capture installation were made using commercial software. After integration of these models the net electricity generation efficiency as a function of the degree of oxygen recovery in high temperature membrane was analyzed.
    Źródło:
    Archives of Thermodynamics; 2014, 35, 3; 105-116
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the Transition Time From Air to Oxy-Combustion
    Autorzy:
    Lasek, J.
    Lajnert, R.
    Głód, K.
    Zuwała, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/185355.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    oxy-fuel
    combustion
    dynamic transition
    spalanie
    Opis:
    In this paper some issues of the transition process from air- to oxy-combustion were investigated. Advantages of flexible combustion were described. Flexible combustion tests carried out at four European plants and five plants outside Europe of different scales of process and test parameters were presented. An analysis of the transition time from air to oxy-combustion of different laboratory and pilot scale processes was carried out. The “first-order + dead time” approach was used as a model to describe transition process. Transitional periods between combustion modes and characteristic parameters of the process were determined. The transition time depends not only on the facility’s capacity but also it is impacted by specific operational parameters.
    Źródło:
    Chemical and Process Engineering; 2015, 36, 1; 113-120
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    NOx and SO2 emission during oxy-coal combustion
    Autorzy:
    Moroń, W.
    Czajka, K.
    Ferens, W.
    Babul, K.
    Szydełko, A.
    Rybak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/184966.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    coal combustion
    pollutant emissions
    oxy atmosphere
    spalanie węgla
    emisji zanieczyszczeń
    Opis:
    The paper presents results of coal behaviour during combustion in oxy-fuel atmosphere. The experiment was performed using 3 meter long Entrained Flow Reactor and 1 meter long Drop Tube Reactor. Three hard coals and two lignites were analysed in order to investigate NOx, SO2 emission and fly ash burnout. The measurements were performed along and at the outlet of a combustion chamber for one– and two – stage combustion. In the second stage of the experiment, kinetic parameters for nitrogen evolution during combustion in oxy – fuel and air were calculated and the division of nitrogen into the volatile matter and the char was measured. The conducted experiment showed that emissions in oxy – fuel are lower than those in air.
    Źródło:
    Chemical and Process Engineering; 2013, 34, 3; 337-346
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technical and economic aspects of oxygen separation for oxy-fuel purposes
    Autorzy:
    Chorowski, M.
    Gizicki, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/240161.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    air separation
    oxy-combustion
    energy storage
    separacja powietrza
    spalanie w tlenie
    magazynowanie energii
    Opis:
    Oxy combustion is the most promising technology for carbon dioxide, originated from thermal power plants, capture and storage. The oxygen in sufficient quantities can be separated from air in cryogenic installations. Even the state-of-art air separation units are characterized by high energy demands decreasing net efficiency of thermal power plant by at least 7%. This efficiency decrease can be mitigated by the use of waste nitrogen, e.g., as the medium for lignite drying. It is also possible to store energy in liquefied gases and recover it by liquid pressurization, warm-up to ambient temperature and expansion. Exergetic efficiency of the proposed energy accumulator may reach 85%.
    Źródło:
    Archives of Thermodynamics; 2015, 36, 1; 157-170
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oxy-combustion of biomass in a circulating fluidized bed
    Autorzy:
    Kosowska-Golachowska, M.
    Kijo-Kleczkowska, A.
    Luckos, A.
    Wolski, K.
    Musiał, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/240037.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    biomass
    Salix viminalis
    oxy-fuel combustion
    CFB
    TG/DTA
    biomasa
    wierzba wiciowa
    spalanie tlenowe
    Opis:
    The objective of this study was to investigate combustion characteristics of biomass (willow, Salix viminalis) burnt in air and O2/CO2 mixtures in a circulating fluidized bed (CFB). Air and oxy-combustion characteristics of wooden biomass in CFB were supplemented by the thermogravimetric and differential thermal analyses (TGA/DTA). The results of conducted CFB and TGA tests show that the composition of the oxidizing atmosphere strongly influences the combustion process of biomass fuels. Replacing N2 in the combustion environment by CO2 caused slight delay (higher ignition temperature and lower maximum mass loss rate) in the combustion of wooden biomass. The combustion process in O2/CO2 mixtures at 30% and 40% O2 is faster and shorter than that at lower O2 concentrations.
    Źródło:
    Archives of Thermodynamics; 2016, 37, 1; 17-30
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of combustion of natural gas with 21–29% O2/CO2/N2mixtures on emission of carbon monoxide
    Wpływ spalania gazu ziemnego w mieszankach 21–29% O2/CO2/N2 na emisję monotlenku węgla
    Autorzy:
    Kalicka, Z.
    Jerzak, W.
    Kawecka-Cebula, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/204616.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    oxy combustion
    natural gas
    CO emission
    gaz ziemny
    spalanie gazu ziemnego
    emisja monotlenku węgla
    Opis:
    Natural gas combustion was carried out in air enriched with oxygen in the amount of 25 and 29% with addition of CO2 in place of part of nitrogen. The research was carried out at different flow rates of gas and oxygen excess ratios. The concentration of CO and NOx was analyzed. It has not been proved that the increased oxygen concentration influences significantly the CO concentration. However, the addition of CO2 caused a substantial variability of CO concentration in the exhaust gas, in contrast to the concentration of NOx which decreased monotonically. Model calculations, performed with use of FactSage, indicate an increase in the concentration of CO not only for the air enriched with oxygen, but after adding CO2 too, as well.
    Przeprowadzono spalanie gazu ziemnego w powietrzu wzbogaconym w tlen w ilości 25 i 29% z dodatkiem CO2 w miejsce części azotu. Badania prowadzono przy różnych przepływach gazu i współczynnikach nadmiaru tlenu. Analizowano stężenie CO oraz NOx. Nie stwierdzono, by zwiększone stężenie tlenu wpłynęło w sposób znaczący na stężenie CO. Natomiast dodatek CO2 spowodował znaczną zmienność stężenia CO w spalinach, w przeciwieństwie do stężenia NOx, które spadało monotonicznie. Obliczenia modelowe, przeprowadzone przy pomocy FactSage, wskazują na wzrost stężenia CO nie tylko dla powietrza wzbogaconego w tlen, ale także po dodaniu CO2.
    Źródło:
    Archives of Environmental Protection; 2013, 39, 4; 93-103
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamic analysis of the advanced zero emission power plant
    Autorzy:
    Kotowicz, J.
    Job, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/240797.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AZEP
    gas turbine
    membrane reactor
    oxy-combustion
    CCS
    turbina gazowa
    reaktor membranowy
    spalanie w tlenie
    Opis:
    The paper presents the structure and parameters of advanced zero emission power plant (AZEP). This concept is based on the replacement of the combustion chamber in a gas turbine by the membrane reactor. The reactor has three basic functions: (i) oxygen separation from the air through the membrane, (ii) combustion of the fuel, and (iii) heat transfer to heat the oxygen-depleted air. In the discussed unit hot depleted air is expanded in a turbine and further feeds a bottoming steam cycle (BSC) through the main heat recovery steam generator (HRSG). Flue gas leaving the membrane reactor feeds the second HRSG. The flue gas consist mainly of CO2 and water vapor, thus, CO2 separation involves only the flue gas drying. Results of the thermodynamic analysis of described power plant are presented.
    Źródło:
    Archives of Thermodynamics; 2016, 37, 1; 87-98
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Coal Char Kinetics of Oxidation and Gasification Reactions
    Autorzy:
    Lewtak, R.
    Hercog, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/185256.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    kinetic parameters
    char particle oxidation and gasification
    oxy-fuel combustion
    parametry kinetyczne
    utlenianie cząstek stałych
    spalanie tlenowo-paliwowe
    Opis:
    Experimental investigations and numerical simulations have been conducted in this study to derive and test the values of kinetic parameters describing oxidation and gasification reactions between char carbon and O2 and CO2 occurring at standard air and oxy-fuel combustion conditions. Experiments were carried out in an electrically heated drop-tube at heating rates comparable to fullscale pulverized fuel combustion chambers. Values of the kinetic parameters, obtained by minimization of the difference between the experimental and modeled values of char burnout, have been derived and CFD simulations reproducing the experimental conditions of the drop tube furnace confirmed proper agreement between numerical and experimental char burnout.
    Źródło:
    Chemical and Process Engineering; 2017, 38, 1; 135-145
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Life cycle assessment analysis of supercritical coal power units
    Autorzy:
    Ziębik, A.
    Hoinka, K.
    Liszka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/240919.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CCS
    dopalanie
    LCA
    ocena ekologiczna
    spalanie tlenu
    zużycie energii
    cumulative energy consumption
    ecological analysis
    oxy-combustion
    post-combustion
    Opis:
    This paper presents the Life Cycle Assessment (LCA) analysis concerning the selected options of supercritical coal power units. The investigation covers a pulverized power unit without a CCS (Carbon Capture and Storage) installation, a pulverized unit with a "post-combustion" installation (MEA type) and a pulverized power unit working in the "oxy-combustion" mode. For each variant the net electric power amounts to 600 MW. The energy component of the LCA analysis has been determined. It describes the depletion of non-renewable natural resources. The energy component is determined by the coefficient of cumulative energy consumption in the life cycle. For the calculation of the ecological component of the LCA analysis the cumulative CO2 emission has been applied. At present it is the basic emission factor for the LCA analysis of power plants. The work also presents the sensitivity analysis of calculated energy and ecological factors.
    Źródło:
    Archives of Thermodynamics; 2010, 31, 3; 115-130
    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:
    System approach to the analysis of an integrated oxy-fuel combustion power plant
    Autorzy:
    Ziębik, A.
    Gładysz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/240507.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    system approach
    input-output analysis
    oxy-fuel combustion
    cumulative energy
    exergy consumption
    system exergy losses
    thermoecological cost
    zarządzanie jakością
    analiza wejścia-wyjścia
    spalanie w tlenie
    energia skumulowana
    zużycie egzergii
    straty egzergii
    koszt termoekologiczny
    Opis:
    Oxy-fuel combustion (OFC) belongs to one of the three commonly known clean coal technologies for power generation sector and other industry sectors responsible for CO2 emissions (e.g., steel or cement production). The OFC capture technology is based on using high-purity oxygen in the combustion process instead of atmospheric air. Therefore flue gases have a high concentration of CO2 - Due to the limited adiabatic temperature of combustion some part of CO2 must be recycled to the boiler in order to maintain a proper flame temperature. An integrated oxy-fuel combustion power plant constitutes a system consisting of the following technological modules: boiler, steam cycle, air separation unit, cooling water and water treatment system, flue gas quality control system and CO2 processing unit. Due to the interconnections between technological modules, energy, exergy and ecological analyses require a system approach. The paper present the system approach based on the 'input-output' method to the analysis of the: direct energy and material consumption, cumulative energy and exergy consumption, system (local and cumulative) exergy losses, and thermoecological cost. Other measures like cumulative degree of perfection or index of sustainable development are also proposed. The paper presents a complex example of the system analysis (from direct energy consumption to thermoecological cost) of an advanced integrated OFC power plant.
    Źródło:
    Archives of Thermodynamics; 2014, 35, 3; 39-57
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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