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Optimisation and thermo-mechanical analysis of a coated steam dual pipe system for use in advanced ultra-supercritical power plant

Article dans une revue avec comité de lecture
Author
GUO, X.F.
407023 University of Nottingham, UK [UON]
SUN, W.
407023 University of Nottingham, UK [UON]
BECKER, A.
407023 University of Nottingham, UK [UON]
MORRIS, A.
254304 EDF Energy R&D UK Centre
PAVIER, M.
220393 University of Bristol [Bristol]
FLEWITT, P.
220393 University of Bristol [Bristol]
TIERNEY, M.
220393 University of Bristol [Bristol]
WALES, C.
220393 University of Bristol [Bristol]
ccBENAARBIA, Adil
178323 Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux [LEM3]

URI
http://hdl.handle.net/10985/19601
DOI
10.1016/j.ijpvp.2020.104157
Date
2020
Journal
International Journal of Pressure Vessels and Piping

Abstract

Improving the energy efficiency of power plants by increasing steam operating temperature up to 700 °C can be achieved using novel engineering design concepts such as coated steam pipe systems. This paper presents an optimised design for a novel coated dual pipe system to be used in advanced ultra-supercritical power plant. The approach developed in this study uses a combination of an optimisation algorithm and FE simulation, based on the reduction of the hoop stress at top coat/bond coat interface generated by the thermal and mechanical stresses. This allows determination of the optimum dimensions and material properties of the system. A unified viscoplastic model which combines a power flow rule with non-linear anisothermal evolution of isotropic and kinematic hardening has been used for the thermo-mechanical analysis of the coated dual pipe system under the cyclic loading. The results of the optimisation show that the value of the hoop stress at the top coat/bond coat interface is reduced significantly, compared with that in the baseline model. Finally, the potential technical challenges and future works for the proposed steam dual pipe system are discussed.

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