蒸気冷却ガスタービンの技術的特徴と運転実績について(FP1 高温・高効率発電・エネルギー貯蔵技術)

概要

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Steam has higher specific heat than air which makes it an attractive medium for cooling hot gas path components in industrial gas turbines. Heat is exchanged between the hot metal surface and the cooling-steam while it flows through the internal cooling passages of turbine hardware. This cooling approach is applied in a closed-circuit in the G and H gas turbines. This paper discusses the design approach followed for Mitsubishi's G and H gas turbines. Both gas turbines have can-annular combustor liners that are steam-cooled. (Definition: a combustor liner has both the basket and transition piece, integrated together). Additionally, the turbine rotor, rows 1 and 2 blades and vanes, and the blade rings are steam-cooled in the H gas turbine. This paper presents G gas turbines field experience with the steam-cooled combustor liner after accumulating more than 150,000 actual operating hours.
一般社団法人日本機械学会の論文
2004-06-22