Microstructural Evaluation of HR6W and T92 after Supercritical CO2 exposure

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F20%3AN0000175" target="_blank" >RIV/26722445:_____/20:N0000175 - isvavai.cz</a>

Výsledek na webu

<a href="https://arhiv.djs.si/proc/nene2020/pdf/NENE2020_1111.pdf" target="_blank" >https://arhiv.djs.si/proc/nene2020/pdf/NENE2020_1111.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Microstructural Evaluation of HR6W and T92 after Supercritical CO2 exposure

Popis výsledku v původním jazyce

The supercritical carbon dioxide Brayton cycle is being considered as an innovative technology with potential for replacement of conventional steam cycles. Increased efficiency and operational flexibility at specific operational parameters is expected that can be beneficial for various power sources including nuclear, fossil or renewable. The optimization of the design of supercritical CO2 (sCO2) Brayton cycle and of its main components is essential to achieve requested parameters of the thermal cycle. The optimization requires not only the cycle layout and the components design studies but also selection of the materials. The materials research is critical in the field of the sCO2 technology development due to the fact that the main benefits of the sCO2 cycles are gained at extreme operational conditions such as temperatures above 550°C and pressures up to 25 MPa. The corrosion behaviour of the materials selected for the high temperature components in the sCO2 environment was investigated. This work addresses the testing of the resistance HR6W and T92 materials before and after exposure. The results summarise the experimental campaign characterized by 1000 hours of exposure of the selected steels in the sCO2 at 550°C and 25 MPa. The materials compatibility testing was conducted for materials that were identified as potential candidates for high temperature components of the sCO2 cycles such as heat exchangers or pipes. Testing was completed for samples in the unstressed conditions. The samples exposed to sCO2 showed some oxidation, the extent of which varied considerably between the materials tested. Examination of cross sections of the samples showed perceptible differences caused by the sCO2 exposure.

Název v anglickém jazyce

Microstructural Evaluation of HR6W and T92 after Supercritical CO2 exposure

Popis výsledku anglicky

The supercritical carbon dioxide Brayton cycle is being considered as an innovative technology with potential for replacement of conventional steam cycles. Increased efficiency and operational flexibility at specific operational parameters is expected that can be beneficial for various power sources including nuclear, fossil or renewable. The optimization of the design of supercritical CO2 (sCO2) Brayton cycle and of its main components is essential to achieve requested parameters of the thermal cycle. The optimization requires not only the cycle layout and the components design studies but also selection of the materials. The materials research is critical in the field of the sCO2 technology development due to the fact that the main benefits of the sCO2 cycles are gained at extreme operational conditions such as temperatures above 550°C and pressures up to 25 MPa. The corrosion behaviour of the materials selected for the high temperature components in the sCO2 environment was investigated. This work addresses the testing of the resistance HR6W and T92 materials before and after exposure. The results summarise the experimental campaign characterized by 1000 hours of exposure of the selected steels in the sCO2 at 550°C and 25 MPa. The materials compatibility testing was conducted for materials that were identified as potential candidates for high temperature components of the sCO2 cycles such as heat exchangers or pipes. Testing was completed for samples in the unstressed conditions. The samples exposed to sCO2 showed some oxidation, the extent of which varied considerably between the materials tested. Examination of cross sections of the samples showed perceptible differences caused by the sCO2 exposure.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

NENE 2020 conference proceedings

ISBN

978-961-6207-49-2

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

1-8

Název nakladatele

Nuclear Society of Slovenia

Místo vydání

Řež

Místo konání akce

Portorož, Slovenia

Datum konání akce

9. 9. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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