Design of 600 °C Class 1 000 MW Steam Turbine

Abstract

In Japan, all large capacity fossil-fuel power plants are supercritical units and a steam condition of 24.1MPag, 538 / 566°C has been adopted. Through extensive development work, the design and material technologies for steam turbines with a 593°C steam temperature have been established, and the steam condition of 24.1MPag, 538 / 593°C was applied to the 700 MW steam turbine of Hekinan No.3 Unit, Chubu Electric Power Co., Inc.for the first time in Japan. This unit has been operating successfully since it started commercial operation in April, 1993. Mitsubishi Heavy Industries, Ltd.(MHI)designed 1 000 MW class turbines with more advanced steam comditions of 600°C class main steam and reheat steam temperatures for the first time in Japan, applying the latest technologies developed for 600°C class application.