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Thermal and stress analyses of a novel coated steam dual pipe system for use in advanced ultra-supercritical power plant

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Thermal and stress analyses of a novel coated steam dual pipe system for use in advanced ultra-supercritical power plant. / Guo, Xiaofeng; Sun, Wei; Becker, Adib; Morris, Andy; Pavier, Martyn; Flewitt, Peter; Tierney, Michael; Wales, Christopher.

In: International Journal of Pressure Vessels and Piping, Vol. 176, 103933, 01.09.2019.

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Guo, Xiaofeng ; Sun, Wei ; Becker, Adib ; Morris, Andy ; Pavier, Martyn ; Flewitt, Peter ; Tierney, Michael ; Wales, Christopher. / Thermal and stress analyses of a novel coated steam dual pipe system for use in advanced ultra-supercritical power plant. In: International Journal of Pressure Vessels and Piping. 2019 ; Vol. 176.

Bibtex

@article{5565b2ca63b043f9be8bcb5dd7c17091,
title = "Thermal and stress analyses of a novel coated steam dual pipe system for use in advanced ultra-supercritical power plant",
abstract = "Improving the energy efficiency of advanced ultra-supercritical power plants, by increasing steam operating temperature up to 700 °C, can be achieved, at reduced cost, by using novel engineering design concepts, such as coated steam pipe systems manufactured from high temperature materials commonly used in current operational power plants. This paper describes a preliminary feasibility analysis of the design concept of a novel coated dual pipe system under steady-state operation, using analytical and finite element models to evaluate the possible thermal gradients and stresses generated. The results show that the protective coating layer contributes to the effective reduction in the surface temperature of the primary steel pipe. Thermal stresses generated due to the significant difference in the thermal and mechanical properties of the coating and substrate pipe are larger than the mechanical stresses generated by the combined effects of the internal steam pressure in the primary steam pipe and external pressure from the counter-flow cooling steam during steady-state operation. Compared with the stress relaxation of the coating and substrate pipe, creep has a significant impact on the stress distribution within the coating layer. Several key factors have been identified, such as the coating thickness, conductivity, thermal expansion, heat transfer coefficient of cooling steam, cooling steam temperature and cooling steam pressure, which are found to govern thermal and stress distributions during steady-state operation.",
keywords = "Creep, Thermal and stress analyses, Dual pipe system, Thermal barrier coating, Advanced ultra-supercritical",
author = "Xiaofeng Guo and Wei Sun and Adib Becker and Andy Morris and Martyn Pavier and Peter Flewitt and Michael Tierney and Christopher Wales",
year = "2019",
month = "9",
day = "1",
doi = "10.1016/j.ijpvp.2019.103933",
language = "English",
volume = "176",
journal = "International Journal of Pressure Vessels and Piping",
issn = "0308-0161",
publisher = "Elsevier",

}

RIS - suitable for import to EndNote

TY - JOUR

T1 - Thermal and stress analyses of a novel coated steam dual pipe system for use in advanced ultra-supercritical power plant

AU - Guo, Xiaofeng

AU - Sun, Wei

AU - Becker, Adib

AU - Morris, Andy

AU - Pavier, Martyn

AU - Flewitt, Peter

AU - Tierney, Michael

AU - Wales, Christopher

PY - 2019/9/1

Y1 - 2019/9/1

N2 - Improving the energy efficiency of advanced ultra-supercritical power plants, by increasing steam operating temperature up to 700 °C, can be achieved, at reduced cost, by using novel engineering design concepts, such as coated steam pipe systems manufactured from high temperature materials commonly used in current operational power plants. This paper describes a preliminary feasibility analysis of the design concept of a novel coated dual pipe system under steady-state operation, using analytical and finite element models to evaluate the possible thermal gradients and stresses generated. The results show that the protective coating layer contributes to the effective reduction in the surface temperature of the primary steel pipe. Thermal stresses generated due to the significant difference in the thermal and mechanical properties of the coating and substrate pipe are larger than the mechanical stresses generated by the combined effects of the internal steam pressure in the primary steam pipe and external pressure from the counter-flow cooling steam during steady-state operation. Compared with the stress relaxation of the coating and substrate pipe, creep has a significant impact on the stress distribution within the coating layer. Several key factors have been identified, such as the coating thickness, conductivity, thermal expansion, heat transfer coefficient of cooling steam, cooling steam temperature and cooling steam pressure, which are found to govern thermal and stress distributions during steady-state operation.

AB - Improving the energy efficiency of advanced ultra-supercritical power plants, by increasing steam operating temperature up to 700 °C, can be achieved, at reduced cost, by using novel engineering design concepts, such as coated steam pipe systems manufactured from high temperature materials commonly used in current operational power plants. This paper describes a preliminary feasibility analysis of the design concept of a novel coated dual pipe system under steady-state operation, using analytical and finite element models to evaluate the possible thermal gradients and stresses generated. The results show that the protective coating layer contributes to the effective reduction in the surface temperature of the primary steel pipe. Thermal stresses generated due to the significant difference in the thermal and mechanical properties of the coating and substrate pipe are larger than the mechanical stresses generated by the combined effects of the internal steam pressure in the primary steam pipe and external pressure from the counter-flow cooling steam during steady-state operation. Compared with the stress relaxation of the coating and substrate pipe, creep has a significant impact on the stress distribution within the coating layer. Several key factors have been identified, such as the coating thickness, conductivity, thermal expansion, heat transfer coefficient of cooling steam, cooling steam temperature and cooling steam pressure, which are found to govern thermal and stress distributions during steady-state operation.

KW - Creep

KW - Thermal and stress analyses

KW - Dual pipe system

KW - Thermal barrier coating

KW - Advanced ultra-supercritical

U2 - 10.1016/j.ijpvp.2019.103933

DO - 10.1016/j.ijpvp.2019.103933

M3 - Article

VL - 176

JO - International Journal of Pressure Vessels and Piping

JF - International Journal of Pressure Vessels and Piping

SN - 0308-0161

M1 - 103933

ER -