Gas Turbine Combined Cycle (GTCC) power plants utilize fossil fuels to deliver the cleanest and most efficient power generation.
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When power is generated by a standalone gas turbine in what is called the simple cycle or open cycle method, the gas turbine releases exhaust gas at high temperatures of around 600°C into the atmosphere.
Combined cycle power generation is intended to improve the general thermal efficiency of the plant by recovering this high-temperature exhaust gas. Many combined cycle power generation plants for business adopt a waste heat recovery cycle, in which exhaust gas from the gas turbine is led to the waste heat recovery boiler to generate steam using the recovered heat to drive the steam turbine.
In 1984, we delivered a combined cycle power plant to the Higashi-Niigata Thermal Power Station of Tohoku Electric Power Co., Inc. It achieved a revolutionary thermal efficiency of over 44%, then the world' s highest and far greater than conventional thermal power plants.
In 1999, a combined cycle power plant incorporating the G-series gas turbine was constructed and delivered for the No. 4 Series for the same power station. The thermal efficiency of the plant exceeded 50%. In 2016, the combined cycle power plant with the J-series gas turbine reached a cumulative total operation time of 250,000 hours as a commercial system. A cumulative total operation time of more than 250,000 hours is a yardstick for the reliability of gas turbines in the power generation industry. It is the world' s longest among the gas turbines in its output range.
We are the only manufacturer in Japan that uses its proprietary technologies and engages in the entire development cycle of GTCC from design, manufacturing, civil engineering, installation, testing and after-sales services and are proud of the excellent track records we have in our products and services.
Globally, we have exported more than 25 combined cycle power plants to approximately 20 countries mainly in Southeast Asia, the Middle East, Europe, North America and South America.