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Wyszukujesz frazę "water cycle" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Mathematical modelling of steam-water cycle with auxiliary empirical functions application
Autorzy:
Szapajko, G.
Rusinowski, H.
Powiązania:
https://bibliotekanauki.pl/articles/240935.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
model pół-empiryczny
obieg parowo-wodny
turbina upustowo-kondensacyjna
układ CHP
bleed-condensing turbine
CHP unit
semi-empirical model
steam-water cycle
Opis:
Research oriented on identification of operating states variations with the application of mathematical models of thermal processes has been developed in the field of energy processes diagnostics. Simple models, characterised by short calculation time, are necessary for thermal diagnostics needs. Such models can be obtained using empirical modelling methods. Good results brings the construction of analytical model with auxiliary empirical built-in functions. The paper presents a mathematical model of a steam-water cycle containing mass and energy balances and semi-empirical models of steam expansion line in turbine as well as heat transfer in exchangers. A model of steam expansion line in a turbine is worked out with the application of a steam flow capacity equation and an internal efficiency of process equation for each group of stages for the analysed turbine. A model of a heat exchanger contains energy balance and the relation describing heat transfer in an exchanger, proposed by Beckman. Estimation of empirical equations coefficients was realised with the application of special and reliable measurements. Estimation criterion was a weighted relative sum of the remainder squares. There are exemplary calculations results presented in the final part of paper.
Źródło:
Archives of Thermodynamics; 2010, 31, 3; 165-183
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy evaluation of steam-water cycle operation with mathematical modelling application
Autorzy:
Rusinowski, H.
Szapajko, G.
Powiązania:
https://bibliotekanauki.pl/articles/240122.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
krzywe korekcyjne
model matematyczny
obieg parowo-wodny
odchylenia zużycia ciepła
turbina upustowo-kondensacyjna
bleed-condensing turbine
CHP unit
correction curves
deviations of specific heat consumption
mathematical model
steam-water cycle
Opis:
In recent years, we can observe the development of the thermal diagnosis and operating control systems based on measuring techniques and mathematical modelling of processes improvement. Evaluation of the actual operating state is insufficient to make an optimal operating decisions. Thus, information about the influence of the operating parameters. deviations from the reference state on indicators describing energy consumption of the process (for example specific heat consumption or specific energy consumption) is also necessary. The paper presents methods for generation the information about the influence of the steam-water cycle operating parameters on specific heat consumption in a turbine's cycle. A mathematical model of steam-water cycle for a CHP (Cogeneration - also Combined Heat and Power) unit is being worked out. Methods for calculation of operating deviations with the application of correction curves and a mathematical model are described. Exemplary calculation results are presented.
Źródło:
Archives of Thermodynamics; 2011, 32, 4; 101-117
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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