A new method for determining allowable medium temperature during transient operation of thick-walled elements in a supercritical power plant

• Autorzy: Duda P. , Rząsa D.
• Języki publikacji: EN

Abstrakty

EN

Construction elements of supercritical power plants are subjected to high working pressures and high temperatures while operating. Under these conditions high stresses in the construction are created. In order to operate safely, it is important to monitor stresses, especially during start-up and shut-down processes. The maximum stresses in the construction elements should not exceed the allowable stress limit. The goal is to find optimum operating parameters that can assure safe heating and cooling processes [1-5]. The optimum parameters should guarantee that the allowable stresses are not exceeded and the entire process is conducted in the shortest time. In this work new numerical method for determining optimum working parameters is presented. Based on these parameters heating operations were conducted. Stresses were monitored during the entire processes. The results obtained were compared with the German boiler regulations - Technische Regeln fur Dampfkessel 301.

Słowa kluczowe

EN

heat transfer; optimization; steam boilers; total stresses

PL

kocioł parowy; naprężenia całkowite; optymalizacja; wymiana ciepła

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2010
• Tom: Vol. 31, no. 3
• Strony: 55--72
• Opis fizyczny: Bibliogr. 9 poz.,Rys., wykr., wz.,

Twórcy

autor

Duda P.

autor

Rząsa D.

• Cracow University of Technology, Institute of Process and Power Engineering, Al. Jana Pawla II 37, 31-864 Krakow,

Bibliografia

• [1] Taler J. , Duda P. : Solving Direct and Inverse Heat Conduction Problems. Springer-Verlag, Berlin Heidelberg 2006.
• [2] Taler J., Dzierwa P.: A new method for determining allowable medium temperature during heating and cooling of thick walled boiler components. Proceedings of the Congress on Thermal Stresses, Taipei 2007.
• [3] Duda P., Dwornicka R.: Optimization of heating and cooling operations of steam gate valve. Struct Multidisc Optim 40 (2010), 529–535.
• [4] Duda P. Rzasa D.: Optimization of steam gate valve heating operation using Levenberg-Marquardt method. Proc. of the 8th Int. Congress on Thermal Stresses, Vol. 2, Urbana – Champaign 2009, 399–402.
• [5] Taler J. Węglowski B. Grądziel S. Duda P. Zima W.: Monitoring of thermal Stresses in pressure components of large Steam Boilers. VGB KraftwerksTechnik 1, 2002.
• [6] TRD 301, Technische Regeln für Dampfkessel. Carl Heymans Verlag, Köln und Beuth-Verlag, Berlin 1986, 98–138.
• [7] Richter F.: Physikalische Eigenschaften von Stählen und ihre Temperaturabhängigkeit. Mannesmann Forschungberichte 930, Düsseldorf 1983.
• [8] Seber GAF., Wild CJ.: Nonlinear Regression. John Wiley & Sons, New York 1989.
• [9] Press W.H. Teukolsky SA Vetterling WT Flannery BP.: Numerical Recipes, The Art of Scientific Computing. Cambridge University Press, 1997.