Improving thermal cycle efficiency in advanced power plants: water and steam chemistry and materials performance

B. Dooley,     Structural Integrity Associates, Inc USA

R. Svoboda,     Svoboda Consulting, Switzerland


The fundamental need for improved cycle efficiency of steam power plants will require an increase in steam temperatures and pressures from today’s upper end of about 300 bar/600 °C/620 °C up to 378 bar/ 732 °C/760 °C. These plants will be equipped with once-through boilers running under stringent water/steam purity requirements, with oxidizing all-volatile treatment (AVT(O)) or oxygenated treatment (OT), condensate polishers and no copper alloys in the system. While the conditions in the lower temperature end are ...

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