Abstract

According to the increasing demand of energy and environmental requirements, the ultra-supercritical (USC) power plants, with the priority of the high power generation efficiency, reliability, fuel saving, low pollutants emission and advanced technology, have got rapid development in China. In this paper the development history and the state art of the USC power plants were introduced, including the technology transfer, the investment market and R&D programs supported by the government. The investigation shows the necessity and feasibility for the development of the USC units in China. Through the comparisons of the different types pulverized coal-fired power generation plants, the main characteristics of USC power unit were presented. Also the effects of the choice of steam parameters, the type of the boiler and gas turbine and the advanced materials on the operation of the USC units with the high efficiency and under the safety were analyzed. Through the investigation of the design, manufacture facilities, construction and running process of the USC units, the exiting key problems were discussed, together with some helpful suggestion and prospect on the development of the technology route.

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