Acid Corrosion Analysis in the Initial Condensation Zone of a H2O/CO2 Turbine
A supercritical H2O/CO2 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 H2O/CO2 turbine has a relatively high CO2 concentration. In the...
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ftmdpi:oai:mdpi.com:/1996-1073/14/11/3323/ 2023-08-20T04:05:53+02:00 Acid Corrosion Analysis in the Initial Condensation Zone of a H2O/CO2 Turbine Ziyue Ma Xiaofang Wang Jinguang Yang Wei Wang Wenyang Shao Xiaowu Jiang 2021-06-05 application/pdf https://doi.org/10.3390/en14113323 EN eng Multidisciplinary Digital Publishing Institute F4: Critical Energy Infrastructure https://dx.doi.org/10.3390/en14113323 https://creativecommons.org/licenses/by/4.0/ Energies; Volume 14; Issue 11; Pages: 3323 H 2 O/CO 2 turbine initial condensation zone acid corrosion numerical simulation performance degradation Text 2021 ftmdpi https://doi.org/10.3390/en14113323 2023-08-01T01:53:24Z A supercritical H2O/CO2 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 H2O/CO2 turbine has a relatively high CO2 concentration. In the initial condensation zone (ICZ), steam condenses into droplets on the turbine blades and the droplets combine with CO2 to form carbonic acid, which corrodes the turbine blades. In order to research the characteristics of acid corrosion in the ICZ of a H2O/CO2 turbine, the acid corrosion rate of the blades in the ICZ of the H2O/CO2 turbine was calculated and analyzed based on the three-dimensional CFD (3D CFD) method and a one-dimensional numerical model of CO2 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. Text Carbonic acid MDPI Open Access Publishing Energies 14 11 3323 |
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MDPI Open Access Publishing |
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English |
topic |
H 2 O/CO 2 turbine initial condensation zone acid corrosion numerical simulation performance degradation |
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H 2 O/CO 2 turbine initial condensation zone acid corrosion numerical simulation performance degradation Ziyue Ma Xiaofang Wang Jinguang Yang Wei Wang Wenyang Shao Xiaowu Jiang Acid Corrosion Analysis in the Initial Condensation Zone of a H2O/CO2 Turbine |
topic_facet |
H 2 O/CO 2 turbine initial condensation zone acid corrosion numerical simulation performance degradation |
description |
A supercritical H2O/CO2 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 H2O/CO2 turbine has a relatively high CO2 concentration. In the initial condensation zone (ICZ), steam condenses into droplets on the turbine blades and the droplets combine with CO2 to form carbonic acid, which corrodes the turbine blades. In order to research the characteristics of acid corrosion in the ICZ of a H2O/CO2 turbine, the acid corrosion rate of the blades in the ICZ of the H2O/CO2 turbine was calculated and analyzed based on the three-dimensional CFD (3D CFD) method and a one-dimensional numerical model of CO2 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. |
format |
Text |
author |
Ziyue Ma Xiaofang Wang Jinguang Yang Wei Wang Wenyang Shao Xiaowu Jiang |
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 H2O/CO2 Turbine |
title_short |
Acid Corrosion Analysis in the Initial Condensation Zone of a H2O/CO2 Turbine |
title_full |
Acid Corrosion Analysis in the Initial Condensation Zone of a H2O/CO2 Turbine |
title_fullStr |
Acid Corrosion Analysis in the Initial Condensation Zone of a H2O/CO2 Turbine |
title_full_unstemmed |
Acid Corrosion Analysis in the Initial Condensation Zone of a H2O/CO2 Turbine |
title_sort |
acid corrosion analysis in the initial condensation zone of a h2o/co2 turbine |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/en14113323 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
Energies; Volume 14; Issue 11; Pages: 3323 |
op_relation |
F4: Critical Energy Infrastructure https://dx.doi.org/10.3390/en14113323 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/en14113323 |
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Energies |
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14 |
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11 |
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3323 |
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1774716636201222144 |