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|Masato Machida||Thermal & Hydraulic System Turbine Design Dept., Power & Industrial Sytstems,
|Hideo Yoda||Thermal & Hydraulic System Turbine Design Dept., Power & Industrial Sytstems,
|Eiji Saito||Power & Industrial Systems R&D Lab., Power & Industrial Systems,
|Kiyoshi Namura, Dr. Eng.||Power & Industrial Systems R&D Lab., Power & Industrial Systems,
In today's power market, the importance of thermal and nuclear generated power as the stable core foundation of our basic energy needs remains unchanged. Yet the energy industry is facing growing pressure on the cost front as the unit price of energy is driven down by the relaxation of industry regulations and at the same time on the environmental front as the industry struggles to satisfy COP3 (Third Conference of the Parties, Kyoto, Dec. 1-10, 1997) recommended guidelines for the reduction of greenhouse gases. This translates into a demand for more efficient and more reliable steam turbines for thermal and nuclear power plants, not only for new plant installations but also for retrofitting steam turbines that have long been in service. In its commitment to meet these demands, Hitachi has developed a new turbine blade design featuring a CCB (continuous cover blade) structure based on the state-of-the-art analytical technologies and an enormous amount of test data on performance, vibration, and strength from the outset of the development. The blades, from 26 inches (66 cm) for rotation speed of 3,000 rpm to 46 inches (117 cm) for 3,600 rpm, are the basis of a full line-up of CCB long blades for low-pressure last stage blades corresponding to the range of plant outputs. The new blades are now operating smoothly in numerous turbines in Japan and in various other countries.
|The Hitachi Hyoron (Japanese Only)|
steam turbine, long blade, blade structure, high efficiency & reliability