水素燃焼タービン1700℃級ハイブリッド型冷却翼翼列評価試験

概要

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This paper describes the development of 1700℃ class first stage turbine cooling blade applied to hydrogen fueled combustion turbine system with output of 500 MW and thermal efficiency over 60% (HHV)in World Energy Network(WE-NET)program. The conceptual design of those cooling blades, which were served in hot steam flow, was carried out. The hybrid cooling method combining closed circuit passage with a partially open circuit one was chosen among several cooling systems from a point of plant efficiency and durability of cooling blades. The several elemental tests such as outer heat transfer coefficient on airfoil, internal heat transfer one in cooling channel and then evaluation of single crystal super alloy and thermal barrier coating(TBC) in hot steam environment were conducted. Finally the experiment of scale model test blades for the first stage stator and rotor blades were carried out using hydrogen-oxygen combustion wind tunnel with practical steam condition of 1700℃ and 2.5 MPa. The cooling efficiency and metal temperature distribution of test blades and the soundness of TBC and blades substrate were clarified.
社団法人日本ガスタービン学会の論文
2000-03-20