MHTR超临界蒸汽透平循环再热器设计研究

基于采用多堆一机方案可以实现模块式高温气冷堆(MHTR)与大容量超临界蒸汽透平机组的匹配,从而实现MHTR的高效率发电的考虑,进行了MHTR超临界蒸汽透平循环再热器设计的研究.根据百万千瓦级超临界机组的参数确定了主蒸汽和再热蒸汽的MHTR分堆供应方案,给出了再热器的技术参数.通过对不同传热管结构方案的比较,确定了组件式直管型式的结构设计方案,该设计具有结构紧凑、传热系数大、刚度好和制造方便等优点.经过热工水力分析计算,证明这种设计能够满足传热和水动力要求.

Study on the reheater design used in the supercritical steam turbine power conversion cycle of MHTR

Based on the consideration that the modular high temperature gas-cooled reactor(MHTR) can couple with the large-scale supercritical steam turbine unit by adapting multiple-reactors-one-unit plant design concept for much higher power conversion efficiency of MHTR, the study on the reheater design used in the supercritical steam turbine power conversion cycle of MHTR was performed.This paper presents the design concept of life steam and reheating steam separately supplied by different MHTRs based on the parameters of supercritical steam turbine in 1000MW scale,and provides the technical characteristics of the reheater.The heat transfer tube structure type is designed as the subassembly straight tube through comparing that of the difference types,which has the advantages of compact structure,high heat tranmission coefficiency,good rigidity and convenient manufacture. After thermal-hydraulic analysis and calculation,the design is proved to meet the thermal and hydraulic requirements.