The double-reheat power generation technology has a development history of more than half a century

from the first double-reheat thermal power unit commissioned in West Germany in 1956 to the most advanced double-reheat thermal power unit put into operation in Huaneng Laiwu Power Plant

China. According to incomplete statistics

there have been at least 58 double-reheat thermal power units put into operation worldwide. Among which the 6 double-reheat thermal power units commissioned in China are designed with excellent steam parameters and generating efficiencies

which have reached a world-class level. Based on the development in recent years

a set of complete and mature double-reheat technology has been mastered by sci-tech personnels in China

including system design

boiler

turbine

control technology

and so on. Considering the characteristics of doublereheat technology and the development trend of thermal power plants in China

enhancing efficiency and economic viability will be the primary objectives. Besides

considering the flexibility will also be an important target for double-reheat technology.