The effect of the internal reheat application on the efficiency of the 900 MW ultra-supercritical coal-fired power unit

The paper presents a thermal-economic analysis of a 900 MW coal-fired power unit for ultra-supercritical parameters with internal steam reheat. The subject of the study was the cycle proposed as the "initial thermal cycle structure" during the completion of the project "Advanced Techn...

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Bibliographic Details
Published in:Archives of thermodynamics 2011-12, Vol.32 (3), p.127-144
Main Authors: Łukowicz, Henryk, Dykas, Sławomir, Stępczyńska, Katarzyna, Rulik, Sebastian
Format: Article
Language:English
Subjects:
Archives
Electricity generation efficiency
Exchange
Heat exchange
Heat exchangers
Internal reheat
Mathematical analysis
Steam electric power generation
Thermodynamics
Ultra-supercritical coal-fired power units
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Summary:The paper presents a thermal-economic analysis of a 900 MW coal-fired power unit for ultra-supercritical parameters with internal steam reheat. The subject of the study was the cycle proposed as the "initial thermal cycle structure" during the completion of the project "Advanced Technologies for Energy Generation" with the steam parameters of 650/670 °C/30 MPa. Two configurations of internal reheat were analysed: with a four- and seven-section exchanger. The effect of reheat on the operation of the power unit under a partial load was also analysed, and preliminary calculations of the heat exchange area of the internal reheat were made.
ISSN:1231-0956
2083-6023
DOI:10.2478/v10173-011-0018-0