Identification of unmeasured variables in the set of model constraints of the data reconciliation in a power unit

• Autorzy: Szega M. , Nowak G. T.
• Języki publikacji: EN

Abstrakty

EN

In generalized method of data reconciliation as equations of conditions beside substance and energy balances can be used equations which don't have precisely the status of conservation lows. Empirical coefficients in these equations are traded as unknowns' values. To this kind of equations, in application of the generalized method of data reconciliation in supercritical power unit, can be classified: steam flow capacity of a turbine for a group of stages, adiabatic internal efficiency of group of stages, equations for pressure drop in pipelines and equations for heat transfer in regeneration heat exchangers. Mathematical model of a power unit was developed in the code Thermoflex. Using this model the off-design calculation has been made in several points of loads for the power unit. Using these calculations identification of unknown values and empirical coefficients for generalized method of data reconciliation used in power unit has been made. Additional equations of conditions will be used in the generalized method of data reconciliation which will be used in optimization of measurement placement in redundant measurement system in power unit for new control systems.

Słowa kluczowe

EN

mathematical modeling; empirical characteristics; data reconciliation

PL

modelowanie matematyczne; charakterystyka empiryczna; rachunek wyrównawczy

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2013
• Tom: Vol. 34, no. 4
• Strony: 235--245
• Opis fizyczny: Bibliogr. 10 poz., il.

Twórcy

autor

Szega M.

• Silesian University of Technology, Institute of Thermal Technology, Konarskiego 22, 44-100 Gliwice, Poland

autor

Nowak G. T.

• Silesian University of Technology, Institute of Thermal Technology, Konarskiego 22, 44-100 Gliwice, Poland

Bibliografia

• [1] SZARGUT J. et al: Data Reconciliation in Thermal Engineering. Ossolineum, Wrocław 1984 (in Polish).
• [2] BAGAJEWICZ M.J.: Process Plant Instrumentation: Design and Upgrade. Technomic Publishing Company, Inc. Lancaster, Pennsylvania, 2001.
• [3] VDI-Richtlinien. Verein Deutscher Ingenieure. Messunsicherheiten bei Abnahmemessungen an energie- und kraftwerkstechnischen Anlagen, Grundlagen, VDI 2048, (2000), 1.
• [4] SZARGUT J., SKOREK J.: Influence of the preliminary estimation of unknown on the results of coordination of material and energy balances. Bull. PASci., Tech. Ser. 39(1991), 2.
• [5] SZEGA M.: Advantages of an application of the generalized method of data reconciliation in thermal technology. Arch. Thermodyn. 30(2009), 4, 219-232.
• [6] Thermoflow, Inc., 29 Hudson Road, Sudbury, MA 01776 USA, http://www.thermoflow.com
• [7] NOWAK G.T., SZEGA M., BUDNIK M.: Mathematical model of CO2 capture process using MEA used for data reconciliation. In: Proc. of the 3rd Int. Conf. Contemporary Problems of Thermal Engineering, Gliwice 2012.
• [8] ZIĘBIK A., SZEGA M., NOWAK G.T.: Advanced technologies for obtaining energy. Task No 1: Development of a technology for highly efficient zero-emission coal-fired power units integrated with CO2 capture. Research rep., Gliwice 2012 (unpublished).
• [9] SZEGA M.: Application of Data Reconciliation Method for Increase of Measurements Reliability in the Power Unit System of a Steam Power Plant. Monograph 193. Silesian University of Technology Publisher, Gliwice 2009 (in Polish).
• [10] STEINBACH J.: Safety Assessment for Chemical Processes. Wiley-VCH, Weinheim 1999.