On November 4, the fourth phase of Huaneng Yuhuan Power Plant, the world's first 650°C coal-fired power generation demonstration project, reached a key milestone — the unit's first HT700R steam turbine rotor was handed over at Shanghai Turbine Plant. This marks a crucial leap for China's independently developed high-temperature alloy materials from the laboratory to engineering application, laying a solid foundation of core components for the demonstration project's on-schedule commissioning.

The world's first 650°C coal-fired power generation demonstration project is a major national science and technology research project. The main steam and reheat steam temperatures of the unit both reach 650°C, with a design main steam pressure of 35 MPa, representing the highest parameters of current global coal-fired units. The project adopts the HT700 series new high-temperature alloy materials developed by China Huaneng with China's independent intellectual property rights, covering key flow-path components of high-temperature thermal systems including boiler heating surfaces, headers, main steam and reheat steam pipelines, as well as steam turbine valves, cylinders, and rotor forgings. Facing industry-wide challenges such as large-size forging forming, microstructure and property uniformity control, and supply chain process adaptation, Huaneng Zhejiang Branch took the lead in joining forces with Xi'an Thermal Power Research Institute, Xi'an Ju Neng, Shanghai Turbine Plant, and other units both within and outside the system to form a joint task force, collaboratively tackling problems and overcoming bottlenecks and obstacles across the entire chain from R&D to manufacturing to engineering, realizing the industrial application path of the steam turbine rotor from "design" to "product."

This achievement reflects China Huaneng's leading role in continuous research around major national needs in the field of high-end energy equipment localization, and will explore a feasible path for the development of clean and efficient coal power worldwide.