ICOPE-15-C049 The engineering applications of ultra-super-critical double reheat steam turbine

Abstract

This paper introduces the 660MW ultra-supercritical double-reheat steam turbine developed independently by Dongfang Turbine CO.LTD (short for DTC). By improving the steam parameters, optimization of thermal system, using double reheat cycle, application of new high temperature materials, structure upgrading, such turbine parameters are successfully upgraded to 31MPa/600℃/620℃/620℃, power plant generation efficiency reached 46.6%. The unit with the world's highest parameters will be the first double reheat unit in China, provides a feasible path for the plan of energy saving and emission reduction, provides experience for the commercial operation of 700℃ level turbine in the future.