在 1～ 4号 5 0 MW抽汽式汽轮机扩容改造的基础上 ,对 5号机实施了以扩容和提高内效率为双重目标的第二轮技术改造。改造后 ,机组除额定容量由 5 0 MW增加到 60 MW以外 ,机器组的内效率亦比改造前提高了 5 .3 3 % ,取得了更为良好的经济效益与社会效益。表 3参 2 Based on the capacity expansion of the No. 5 0 MW extraction steam turbine of No. 1 to No. 4, the second round of technological transformation was implemented on No. 5 turbine with the dual objective of capacity expansion and internal efficiency enhancement. After retrofitting, the internal efficiency of the machine set was increased by 5.33% compared with that before the retrofit except for the rated capacity of the unit increased from 50 MW to 60 MW, and achieved better economic and social benefits. Table 3 reference 2