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Abstract

High priority has been given to increase efficiency of power generation plants; therefore, the steam conditions of fossil fuelled plants have gradually been improved. Recent developments of material and design techniques, the accumulated experience of the operation and so on have enabled advancements to be made in steam conditions. Two units of 700 MW with advanced steam conditions were constructed at Kawagoe Power Station by Chubu Electric Power Company, Inc. in Japan. These two double reheat units are designed at elevated steam conditions of 310 bar, 5661566/566° C, to improve thermal efficiency by 5 per cent in relative values, as compared with conventional supercritical steam conditions (240 bar, 538/566° C). Considerable research and development has been carried out by the manufacturers of the boiler and the turbine to achieve highly reliable operation. This paper presents the design features, the result of the research and development and the result of the operation of these units.

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References

Ishiki

Toyoda

Kurihara

Design and operating performance of 700 MW LNG-fired ultra supercritical pressure steam generators for Kawagoe units 1 and 2. IMechE Conference on Steam plant for the 1990s, London, 1990, paper C386/055, pp. 39–52 (Mechanical Engineering Publications, London).

Suzuki

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Kakishima

Development of a 700 MW double reheat turbine with advanced supercritical conditions. IMechE Conference on Steam plant for the 1990s, London, 1990, paper C386/002, pp. 31–38 (Mechanical Engineering Publications, London).

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Watanabe

Materials for 700 MW steam turbines with advanced supercritical conditions. IMechE Conference on Steam plant for the 1990s, London, 1990, paper C386/003, pp. 75–80 (Mechanical Engineering Publications, London).

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Aizawa

The design of a 700 MW steam turbine with advanced steam conditions. Proceedings of American Power Conference, 1985, 47, 190–195.

The Construction of 700 MW Units with Advanced Steam Conditions

Abstract

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References