用于高温气冷堆发电设备的闭式循环氦气轮机装置

A Closed Cycle Helium Gas Turbine Plant Used for a High-temperature Gas Cooled Reactor-based Electric Power Generation Unit

对HTGR-GT发电装置中的氦气轮机装置作了简要介绍,叙述其循环、工质以及影响循环效率的关键因素,并分析HTGR-GT发电装置布雷顿循环系统当前和近期的参数值。针对氦气轮机装置,论述了涡轮、压气机、热交换器、转子、轴承和热氦气管道等主要部件的设计和结构特点,并简要介绍了应用于氦气轮机的材料。最后指出在开发HTGR-GT发电设备中要重视两个关键技术问题:一是开发出用于大功率机组的安全、可靠的磁性轴承;二是免除放射性污染能进行安全运行和有效维护的问题。

A brief account is given of the helium gas turbine plant installed in a HTGR-GT electric power generation unit. After a description of its cycle, working medium and key factors having an impact on its cycle efficiency analyzed are the current and near-term parameters of the HTGR-GT power generation unit-based Brayton cycle system. Regarding the helium gas turbine plant the design and construction features of its major components are discussed. They include the turbine, air compressor, heat exchangers, rotors, bearings and hot helium gas piping, etc. Materials used for the helium gas turbine are also briefly described. In conclusion, two key technical issues demanding close attention during the development of HTGR-GT power generation equipment are pointed out. They are: 1. the development of safe and reliable magnetic bearings to be used for a large-sized unit, 2. the elimination of radioactive pollution to ensure a safe operation and the realization of effective maintenance.