@ARTICLE{Grądziel_Sławomir_Determination_2011,
 author={Grądziel, Sławomir},
 number={No 3 December},
 journal={Archives of Thermodynamics},
 pages={191-200},
 howpublished={online},
 year={2011},
 publisher={The Committee of Thermodynamics and Combustion of the Polish Academy of Sciences and The Institute of Fluid-Flow Machinery Polish Academy of Sciences},
 abstract={The following paper presents the method for solving one-dimensional inverse boundary heat conduction problems. The method is used to estimate the unknown thermal boundary condition on inner surface of a thick-walled Y-branch. Solution is based on measured temperature transients at two points inside the element's wall thickness. Y-branch is installed in a fresh steam pipeline in a power plant in Poland. Determination of an unknown boundary condition allows for the calculation of transient temperature distribution in the whole element. Next, stresses caused by non-uniform transient temperature distribution and by steam pressure inside a Y-branch are calculated using the finite element method. The proposed algorithm can be used for thermal-strength state monitoring in similar elements, when it is not possible to determine a 3-D thermal boundary condition. The calculated temperature and stress transients can be used for the calculation of element durability. More accurate temperature and stress monitoring will contribute to a substantial decrease of maximal stresses that occur during transient start-up and shut-down processes.},
 type={Artykuły / Articles},
 title={Determination of temperature and thermal stresses distribution in power boiler elements with use inverse heat conduction method},
 URL={http://journals.pan.pl/Content/94260/PDF/13_paper.pdf},
 doi={10.2478/v10173-011-0022-4},
 keywords={heat transfer coefficient, inverse method, Transient temperature, Stress distribution},
}