Identification of transient thermal boundary conditions in complex-shape bodies

• Autorzy: Duda P.
• Języki publikacji: EN

Abstrakty

EN

The following paper presents a method for solving one- and multidimensional inverse boundary heat conduction problems. The method is used to estimate an unknown thermal boundary condition on an inner surface of complex-shape elements. Next, the Finite Element Method can be used to calculate thermal stresses caused by other loads such as, for instance, internal pressure. The developed method is tested using the measured temperatures generated from a direct solution. Transient temperature distribution obtained from method presented below is compared with the values obtained from the direct solution. Next, method is used to estimate an unknown thermal boundary condition on an inner surface of a thick-walled Y-branch. Solution is based on measured temperature transients at two points inside the elementary wall thickness.

Słowa kluczowe

EN

control system; diagnostic system; heating optimization; inverse method; power plant; stress

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2005
• Tom: Vol. 26, no. 1
• Strony: 17--33
• Opis fizyczny: Bibliogr. 12 poz., wz., rys.

Twórcy

autor

Duda P.

• Institute of Process and Power Engineering, Cracow University of technology, Jana Pawła II 37, 31-864 Cracow, Poland

Bibliografia

• [1] CWYNAR L.: Start-up of power boilers, Wydawnictwa Naukowo-Techniczne, Warszawa 1981.
• [2] 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), 73-78.
• [3] TRD, Power boiler code Carl Heymans Verlag, Koln, und Beuth-Verlag, Berlin, Ausgabe 1986 (in German).
• [4] MATSUMOTO H., KATO F., EKI Y., HISANO K., FUKUSHIMA K., SATO Y.: Turbine control system based on prediction of rotor thermal stress, IEEE Trans, on Power Apparatus and Systems, Vol. PAS-101, No 8, (1982), 2504-2512.
• [5] DUDA P.: Solution of multidimensional inverse heat conduction problem, J. of Heat and Mass Transfer, 40, (2003), 115-122.
• [6] HENSEL E.; HILLS R.G.: An initial value approach to the inverse heat conduction problem, Trans of the ASME, J. of Heat Transfer, 108, (1986), 248-256.
• [7] TALER J., DUDA P.: A space marching method for multidimensional transient inverse heat conduction problems, Heat and Mass Transfer, 34, (1999), 349-356.
• [8] BOTTO D., ZUCCA S., GOLA M. M.: A methodology for on-line calculation of temperature and thermal stress under non-linear boundary conditions, Int. Journal of Pressure Vessels and Piping, 80, (2003), 21-29.
• [9] TALER J.: Theory and practice of identification of heat transfer processes, Wydawnictwo Ossolineum, Kraków 1995 (in Polish).
• [10] WĘGLOWSKI B.: The computer system for on-line thermal monitoring of power boilers, Zeszyty Naukowe Politechniki Krakowskiej, Seria Mechanika, z. 80, Kraków 2001 (in Polish).
• [11] ZILL, D.G.: Differential Equations with Boundary-Value Problems, Prindle, Weber & Schmidt, Boston 1990.
• [12] BECK, J.V.: Hanbook of Numerical Heat Transfer, Inverse Problems, John Wiley & Sons, New York 1988.