E104 700℃級石炭火力向け蒸気タービンの研究開発状況(OS6 高温・高効率発電),動力エネルギーシステム部門20周年,次の20年への新展開)

概要

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Demands for reducing carbon dioxide emissions from coal-fired power plants are considerably increasing from the viewpoint of preserving the global environment. Therefore, a key issue is improving thermal efficiencies for coal-fired power plants, which cover about 40% of the electric power in the world. The development of 700℃ class advanced ultra super critical plant is one of urgent issues for the reduction of carbon dioxide emissions. An evaluation concerning the technology development of the 700℃ class USC plant is being carried out in Europe and the United States. In Japan, the 700℃ class USC technology was finally adapted for one of national projects 2008. This paper describes the development issues and progress of the turbine material and the structures for 700℃ class USC. It especially introduces the development situation of two kinds of unique Ni base alloy.
2010-06-20