Empirical modelling of heat exchangers in a CHP plant with bleed-condensing turbine

• Autorzy: Szapajko G. , Rusinowski H.
• Języki publikacji: EN

Abstrakty

EN

The advanced thermal diagnosis and operating control systems of the coiwentional [1,2,3] and CHP units require application of mathematical models. In the regenerative heat exchangers heat is transferred from steam to heated water. Heat transfer is multidimensional, what entails that mathematical description is complex and time consuming. For the thermal diagnosis needs, the semi-empirical model of heat exchangers has been worked out. This model enables calculation of temperature of the feed water in variable thermal load and pressure drop in the pipeline. Pressure drop between the outlet of the group of stage of the turbine and place of localization of the exchanger has been taken into account by utilization of the empirical function of pressure losses in the pipeline dependent on steam mass fiow. Empirical function describing relationship between variation of the subcooled condensate and thermal capacity of a heat exchanger has been worked out. Empirical coefficients have been estimated by the least squares method using the results of the special measurements [4]. Obtained semi-empirical model of the heat exchangers of the 70 MWel CHP unit has been verified and evaluated with statistical factors usage.

Słowa kluczowe

EN

empirical modelling; heat exchanger; Operating control system; statistical evaluation

PL

modelowanie empiryczne; ocena statystyczna; układ sterowania; wymiennik ciepła

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2008
• Tom: Vol. 29, no. 4
• Strony: 177--184
• Opis fizyczny: Bibliogr. 6 poz.,rys, tab., wz.,

Twórcy

autor

Szapajko G.

autor

Rusinowski H.

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

Bibliografia

• 1. RUSINOWSKI H., SZAPAJKO G., STANEK W.: Hybrid model of the conventional power unit Quarterly Mechanics, Vol. 27, 2008 (in the printing-house).
• 2. SZAPAJKO G., RUSINOWSKI H.: Empirical modelling of the regenerative heat exchangers for the operating control system of the conventional power unit, Proc. of 9th Int. Carpathian Control Conference ICCC 2008, Romania, Sinaia, May 25-28, 2008, 671-674.
• 3. RUSINOWSKI H., SZEGA M., STANEK W.: Energy evaluation of the operation of power unit with utilization of empirical modelling, Research Works - Conferences, Vol. 25/2, 469-480, Publishing House of the Warsaw University of Technology, Warsaw 2007, (in Polish).
• 4. 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).
• 5. BECKMAN G., HEIL G.: Mathematical models for the evaluation of the processes in the power plants, EKM Mittellungen, 10, 1965 (in German).
• 6. BOGUSZ P., KOPCZYŃSKI O., LEWANDOWSKI J.: Simplified mathematical model of the heat exchanger, XVIIIth Congress of the Thermodynamics, Research Works - Conferences, Vol. 22, 129-135, Publishing House of the Warsaw University of Technology, 2002 (in Polish).