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    Wyświetlanie 1-3 z 3
    Tytuł:
    Online monitoring system of air distribution in pulverized coal-fired boiler based on numerical modeling
    Autorzy:
    Żymełka, P.
    Nabagło, D.
    Janda, T.
    Madejski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/240897.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pulverized coal-fired boiler
    air distribution
    online monitoring system
    coal combustion
    combustion airflow measurement
    numerical modeling
    kotły pyłowe opalane węglem
    dystrybucja powietrza
    system monitorowania online
    spalanie węgla
    modelowanie numeryczne
    Opis:
    Balanced distribution of air in coal-fired boiler is one of the most important factors in the combustion process and is strongly connected to the overall system efficiency. Reliable and continuous information about combustion airflow and fuel rate is essential for achieving optimal stoichiometric ratio as well as efficient and safe operation of a boiler. Imbalances in air distribution result in reduced boiler efficiency, increased gas pollutant emission and operating problems, such as corrosion, slagging or fouling. Monitoring of air flow trends in boiler is an effective method for further analysis and can help to appoint important dependences and start optimization actions. Accurate real-time monitoring of the air distribution in boiler can bring economical, environmental and operational benefits. The paper presents a novel concept for online monitoring system of air distribution in coal-fired boiler based on real-time numerical calculations. The proposed mathematical model allows for identification of mass flow rates of secondary air to individual burners and to overfire air (OFA) nozzles. Numerical models of air and flue gas system were developed using software for power plant simulation. The correctness of the developed model was verified and validated with the reference measurement values. The presented numerical model for real-time monitoring of air distribution is capable of giving continuous determination of the complete air flows based on available digital communication system (DCS) data.
    Źródło:
    Archives of Thermodynamics; 2017, 38, 4; 109--125
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of the Rotational Speed of the Polymer SU8 on the Thickness of the Waveguide Layer
    Autorzy:
    Gut, K.
    Pustelny, T.
    Nabagło, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506779.pdf
    Data publikacji:
    2010-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.25.Hz
    42.25.-p
    42.70.-a
    42.82.-m
    42.82.Et
    68.35.Ct
    Opis:
    The paper presents results of investigations concerning the measurement of the refractive index and thickness of planar waveguide structures, obtained by the photopolymerization of polymer SU8. Sodium-calcium glass was used as the substrate. As the knowledge of the quoted parameters is from the viewpoint of the structure of various types of optical sensors of crucial importance, the way of their determination has been presented. The paper deals also with the method of constructing planar polymer waveguides, taking into account problems connected with their adhesion to glass substrates.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 6; 1136-1138
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurements of the Attenuation by Means οf the Scattered Light of Planar Waveguide Structure, Basing on the Polymer SU8 on a Substrate οf Sodium-Calcium Glass
    Autorzy:
    Gut, K.
    Nabaglo, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1795795.pdf
    Data publikacji:
    2009-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.25.Hz
    42.25.-p
    42.70.-a
    42.82.-m
    42.82.Et
    68.35.Ct
    Opis:
    The paper presents the results of investigations concerning the measurement of the attenuation of planar waveguide structures obtained by means of the photopolymerization of the polymer SU8. The applied substrate was sodium-calcium glass. Attenuation is one of the fundamental parameters of optical waveguide, the knowledge of which is of crucial importance in the construction of various kinds of optical sensors. A method of its measurement has been presented, consisting in the recording of the intensity of scattered light making use of CCD camera. The paper deals also with the generation of planar polymer waveguide, taking into account problems connected with the adhesion to glass substrates.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 3; 307-311
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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