Abstract: In this paper, the HP heater system of the 1 000-MW double reheat unit, which is independently developed by Shanghai Electric Power Generation Equipment Co., Ltd., is introduced. The HP heater is designed and developed based on the concept of failure modes. By using the finite element analysis and the temperature field analysis, the pure converse-flowing structure is creatively exploited based on the typical three-heating-zone structure, a special high temperature resistant, Material 91, is selected, and the standards and design codes for specific companies are made. The application shows that the system has high operational economic efficiency, is easy to install and maintain and reaches the boundary conditions of the unit. The technologies introduced in this paper can be promoted and applied on other 660-MW or 1 000-MW units to produce great benefits both socially and economically.

Key words: coal-fired power generation, 1 000 MW, ultra-supercritical unit, double reheat cycle, HP heater, structure design, demenstration power plant