N2 - 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
L1 - http://sd.czasopisma.pan.pl/Content/94493/PDF/15_paper.pdf
L2 - http://sd.czasopisma.pan.pl/Content/94493
PY - 2013
IS - No 4 December
EP - 235-245
KW - mathematical modeling
KW - Empirical characteristics
KW - Data reconciliation
A1 - Szega, Marcin
A1 - Nowak, Grzegorz Tadeusz
PB - The Committee of Thermodynamics and Combustion of the Polish Academy of Sciences and The Institute of Fluid-Flow Machinery Polish Academy of Sciences
SP - 235-245
T1 - Identification of unmeasured variables in the set of model constraints of the data reconciliation in a power unit
DA - 2013
UR - http://sd.czasopisma.pan.pl/dlibra/publication/edition/94493
T2 - Archives of Thermodynamics
DOI - 10.2478/aoter-2013-0040