Acid Corrosion Analysis in the Initial Condensation Zone of a H 2 O/CO 2 Turbine
A supercritical H 2 O/CO 2 turbine is a key piece of equipment for the coal gasification in the supercritical water (CGSW) cycle to achieve conversion of heat into power. Compared with a traditional steam turbine, the working medium of an H 2 O/CO 2 turbine has a relatively high CO 2 concentration....
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ftrepec:oai:RePEc:gam:jeners:v:14:y:2021:i:11:p:3323-:d:569495 2024-04-14T08:10:18+00:00 Acid Corrosion Analysis in the Initial Condensation Zone of a H 2 O/CO 2 Turbine Ziyue Ma Xiaofang Wang Jinguang Yang Wei Wang Wenyang Shao Xiaowu Jiang https://www.mdpi.com/1996-1073/14/11/3323/pdf https://www.mdpi.com/1996-1073/14/11/3323/ unknown https://www.mdpi.com/1996-1073/14/11/3323/pdf https://www.mdpi.com/1996-1073/14/11/3323/ article ftrepec 2024-03-19T10:41:09Z A supercritical H 2 O/CO 2 turbine is a key piece of equipment for the coal gasification in the supercritical water (CGSW) cycle to achieve conversion of heat into power. Compared with a traditional steam turbine, the working medium of an H 2 O/CO 2 turbine has a relatively high CO 2 concentration. In the initial condensation zone (ICZ), steam condenses into droplets on the turbine blades and the droplets combine with CO 2 to form carbonic acid, which corrodes the turbine blades. In order to research the characteristics of acid corrosion in the ICZ of a H 2 O/CO 2 turbine, the acid corrosion rate of the blades in the ICZ of the H 2 O/CO 2 turbine was calculated and analyzed based on the three-dimensional CFD (3D CFD) method and a one-dimensional numerical model of CO 2 corrosion. The results suggest that acid corrosion rates decrease stage by stage in the ICZ due to the reduction in temperature and pressure. Rotor blades in the first stage in the ICZ suffer the worst and form a corrosion zone at the trailing edge of the blade and on the pressure surface. The decline of efficiency caused by corrosion settles down to a relatively steady value of 0.6% for a 10 year service time. Moreover, the corrosion area for the last two stages shrinks with the service time due to the rearward movement of the ICZ. H 2 O/CO 2 turbine; initial condensation zone; acid corrosion; numerical simulation; performance degradation Article in Journal/Newspaper Carbonic acid RePEc (Research Papers in Economics) |
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RePEc (Research Papers in Economics) |
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description |
A supercritical H 2 O/CO 2 turbine is a key piece of equipment for the coal gasification in the supercritical water (CGSW) cycle to achieve conversion of heat into power. Compared with a traditional steam turbine, the working medium of an H 2 O/CO 2 turbine has a relatively high CO 2 concentration. In the initial condensation zone (ICZ), steam condenses into droplets on the turbine blades and the droplets combine with CO 2 to form carbonic acid, which corrodes the turbine blades. In order to research the characteristics of acid corrosion in the ICZ of a H 2 O/CO 2 turbine, the acid corrosion rate of the blades in the ICZ of the H 2 O/CO 2 turbine was calculated and analyzed based on the three-dimensional CFD (3D CFD) method and a one-dimensional numerical model of CO 2 corrosion. The results suggest that acid corrosion rates decrease stage by stage in the ICZ due to the reduction in temperature and pressure. Rotor blades in the first stage in the ICZ suffer the worst and form a corrosion zone at the trailing edge of the blade and on the pressure surface. The decline of efficiency caused by corrosion settles down to a relatively steady value of 0.6% for a 10 year service time. Moreover, the corrosion area for the last two stages shrinks with the service time due to the rearward movement of the ICZ. H 2 O/CO 2 turbine; initial condensation zone; acid corrosion; numerical simulation; performance degradation |
format |
Article in Journal/Newspaper |
author |
Ziyue Ma Xiaofang Wang Jinguang Yang Wei Wang Wenyang Shao Xiaowu Jiang |
spellingShingle |
Ziyue Ma Xiaofang Wang Jinguang Yang Wei Wang Wenyang Shao Xiaowu Jiang Acid Corrosion Analysis in the Initial Condensation Zone of a H 2 O/CO 2 Turbine |
author_facet |
Ziyue Ma Xiaofang Wang Jinguang Yang Wei Wang Wenyang Shao Xiaowu Jiang |
author_sort |
Ziyue Ma |
title |
Acid Corrosion Analysis in the Initial Condensation Zone of a H 2 O/CO 2 Turbine |
title_short |
Acid Corrosion Analysis in the Initial Condensation Zone of a H 2 O/CO 2 Turbine |
title_full |
Acid Corrosion Analysis in the Initial Condensation Zone of a H 2 O/CO 2 Turbine |
title_fullStr |
Acid Corrosion Analysis in the Initial Condensation Zone of a H 2 O/CO 2 Turbine |
title_full_unstemmed |
Acid Corrosion Analysis in the Initial Condensation Zone of a H 2 O/CO 2 Turbine |
title_sort |
acid corrosion analysis in the initial condensation zone of a h 2 o/co 2 turbine |
url |
https://www.mdpi.com/1996-1073/14/11/3323/pdf https://www.mdpi.com/1996-1073/14/11/3323/ |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_relation |
https://www.mdpi.com/1996-1073/14/11/3323/pdf https://www.mdpi.com/1996-1073/14/11/3323/ |
_version_ |
1796307819555717120 |