Development of a New 25MW High Efficiency Heavy-Duty Gas Turbine H-25

A new 25MW class gas turbine H-25 has been developed to meet both 50 Hz and 60 Hz power generation needs with high reliability and efficient performance utilizing advanced high temperature gas turbine technologies. Because of its superior performance, over 32% in simple cycle efficiency, the H-25 gas turbine enables significant reduction of fuel consumption compared with previous 25MH class turbines. The H-25 also achieves higher thermal efficiency in a combined cycle power plant and a cogeneration plant with a waste heat recovery boiler. The first unit entered commercial operation at the end of November 1988 after full load factory test instrumented with more than 800 pieces of instrumentation. This paper describes the design features and the latest technological refinements in each component of the H-25 gas turbine. Also presented are the component test programs and the results of full load factory test and field test on the first unit.