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Abstrakty
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.
Czasopismo
Rocznik
Tom
Strony
165--183
Opis fizyczny
Bibliogr. 20 poz.,Rys., wykr., wz.,
Twórcy
autor
autor
- The Silesian University of Technology, Institute of Thermal Technology 44-100 Gliwice, Konarskiego 22, Poland, grzegorz.szapajko@polsl.pl
Bibliografia
- [1] Badyda K., Lewandowski J., Miller A., Świrski K: Simulator of Power unit cooperating with distributed control system. Publishing House of Warsaw University of Technology, Conferences, 15(1997) (in Polish).
- [2] Beckman G., Heil G.: Mathematische Modelle für die Beurteilung vob Kraftwersprozessen. EKM Mittellungen, 10(1965).
- [3] Bogusz P., Kopczyński O., Lewandowski J.: Simplified mathematical model of the heat exchanger. XVIIIth Congress of the Thermodynamics, Research Works - Conferences, Publishing House of the Warsaw University of Technology, 22(2002), 129–135 (in Polish).
- [4] Bujalski W., Lewandowski J.: Identification of mathematical model of steam turbine with the application of measurements from DCS system. Research Works – Conferences – Mechanics , Publishing House of Warsaw University of Technology, Vol. 190, Warsaw 2001 (in Polish).
- [5] Chmielniak T.: Thermal Turbines. Publishing House of the Silesian University of Technology, Script 1737, Gliwice 1993 (in Polish).
- [6] Elliott T. C.: Standard Handbook of Power Plant Engineering. McGraw-Hill Publishing Company, New York 1989.
- [7] Kosman G., Łukowicz H., Kosman W.: Periodic evaluation and update of energy characteristics for steam turbines. Materials of 1st Conference „Contemporary Energy Technologies, Machines and Devices”, Crakow 2007, 275–288 (in Polish).
- [8] Kreith F., Yogi Goswami D. (eds.): Handbook of Energy Efficiency and Renewable Energy. CRC Press, Boca Raton 2007.
- [9] Laudyn D., Pawlik M., Strzelczyk F.: Power Plants. WNT, Warsaw 1995 (in Polish).
- [10] Miller A., Lewandowski J.: Work of Steam Turbines in Variable Workload. Publishing House of Warsaw University of Technology, Warsaw 1992 (in Polish).
- [11] Perycz S.: Steam Turbines. Ossolineum, 1992 (in Polish).
- [12] Press W. H., Teukolsky S. A., Vetterling W. T., Flannery B. P.: Numerical Recipes in Fortran. The Art of Scientific Computing, 2nd ed. Cambridge University Press, 1994.
- [13] Rusinowski H., Szapajko G.: Energy evaluation of operation for CHP unit with bleed-condensing turbine. Rynek Energii 85 (2009) 6, 103–110 (in Polish).
- [14] Rusinowski H., Szapajko G., Stanek W.: Hybrid model of the conventional power unit. Mechanics 27 (2008) No. 3, 120–130.
- [15] Rusinowski H., Szega M., Stanek W.: Energy evaluation of the operation of power unit with utilization of empirical modelling. Research Works – Conferences, 25(2007), 2, 469–480, Publishing House of the Warsaw University of Technology, Warsaw 2007 (in Polish).
- [16] Savola T., Keppo I.: Off-design simulation and mathematical modeling of smallscale CHP plants at part loads. Applied Thermal Engineering 25(2005), 1219–1232.
- [17] Szapajko G.: Empirical modelling of steam cycle for advanced operating control systems. PhD thesis, 2010 (in Polish).
- [18] Szapajko G., Rusinowski H.: Empirical modelling of heat exchangers in a CHP plant with bleed-condensing turbine. Archives of Thermodynamics 29 (2008), 4, 177–184.
- [19] Tuliszka E.: Thermal Turbines. WNT, Warsaw 1973 (in Polish).
- [20] Ziębik A., Rusinowski H., Szega M. et al.: Operating control system of the CHP unit Elektrownia Jaworzno II in the Elektrownia Jaworzno III with the application of the compensatory calculus. Scientific-research work, Gliwice 2001 (in Polish).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BGPK-2912-1508