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Wyszukujesz frazę "Prihoda, M." wg kryterium: Autor

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Characteristics of grain quality and the endosperm microstructure of some Czech and Polish winter wheats
    Autorzy:
    Sadowska, J.
    Jelinski, T.
    Hruskova, M.
    Prihoda, J.
    Klockiewicz-Kaminska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/24048.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    microstructure
    grain quality
    classification
    starch
    digital image analysis
    Polska
    wheat
    size distribution
    endosperm
    winter wheat
    starch granule
    Źródło:
    International Agrophysics; 2003, 17, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of nitrogen oxides formation applying dimensional analysis
    Autorzy:
    Carnogurska, M.
    Brestovic, T.
    Prihoda, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/185009.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    modelowanie matematyczne
    analiza wymiarowa
    dimensional analysis
    nitrogen oxides
    mathematical modelling
    Opis:
    The article presents the procedure for how to establish a mathematical model of nitrogen oxides formation based on the theory of dimensional analysis. The model is based on selected physical quantities (parameters) measurable during regular operation of a heat generation plant. The objective of using dimensional analysis to describe nitrogen oxides formation is to show that between operating parameters of the combustion equipment and the NOx formation there is a significant correlation. The obtained results, which are further described in this article, have proved this fact. The obtained formula expressing nitrogen oxides formation, based on dimensional analysis, applies universally to any boiler fuelled by coal, gas or biomass. However, it is necessary to find C, m, n constants for the formula by experiment, individually for each type of boiler and used fuel. The experiment is based on on-line measurements of selected operational parameters for a given boiler, combusting a certain type of fuel with its actual moisture content and calorific value. The methodology, described in this article, helps to find relationships between the operational parameters and the formation of NOx emissions for a particular furnace. The developed mathematical model has been validated with boilers fuelled by black coal and biomass. Both the results obtained from direct measurements of NOx in both types of boilers, and the results obtained by calculation using equation based on the dimensional analysis, are in a very good accord. When burning coal, the variation between NOx expression from the model and the on-line measurements ranges between -12.23 % and + 9.92 %, and for burning biomass between -0.54 % and 0.48 %. The intention of the authors is to inform the professional community about the suitability of the dimensional analysis to describe any phenomena for which there is currently no exact mathematical formulation based on differential equations or empirical formulas. Many other examples of dimensional analysis applications in practice may be found in the work of Carnogurska and Prihoda (2011).
    Źródło:
    Chemical and Process Engineering; 2011, 32, 3; 175-184
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence Of Calcite On The Ash Flow Temperature For Semi-Anthracite Coal From Donbas District
    Autorzy:
    Čarnogurská, M.
    Příhoda, M.
    Pyszko, R.
    Širillová, L.
    Palkóci, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/184964.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    węgiel
    popiół
    temperatura zasilania
    symulacja numeryczna
    coal
    ash
    additive
    flow temperature
    numerical simulation
    Opis:
    This paper presents the results of research focused on the lowering of ash flow temperature at semianthracite coal from Donbas district by means of additive (calcite) dosing. Ash fusion temperatures were set for two coal samples (A, B) and for five various states (samples of ash without any additives, with 1%, with 3%, with 5% and with 7% of the additive) in total. The macroscopicphotographic method was used for identifying all specific temperatures. Obtained outputs prove that A type coal has a lower value of sphere temperature than B type coal in the whole scope of percentage representation of the additive. The flow temperature dropped in total from 1489°C to 1280°C, i.e. by 14% during the test of coal of type A with 7% of the additive; while it was near 10% for coal of type B (from 1450°C to 1308°C). Numerical simulations of the process showed that it is not effective to add an additive with a grain size lower than 280 μm by means of wastevapour burners.
    Źródło:
    Chemical and Process Engineering; 2014, 35, 4; 515-525
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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