超超临界机组全容量汽动给水泵组经济性分析

Economic Analysis of Full Capacity Steam-driven Feedwater Pump Set for Ultra Supercritical Units

以一在建1 000 MW机组超超临界机组为例,运用投资回收期法,分析比较2×50%容量给水泵组和1×100%全容量给水泵组的综合效益。结果表明:1×100%全容量给水泵组虽然每台机组增加初投资2 644.5×10~4元,但每年运行净收入可增加464.3×10~4元,贷款利率按6%计算,8.2 a就可以收回成本。因此,1×100%全容量给水泵组的综合效益更高。

Taking a 1 000 MW ultra supercritical unit under construction as an example, this paper used the payback period method to analyze and compare the comprehensive benefits of 2×50% capacity feedwater pump set and 1×100% full capacity feedwater pump set. The results showed that although the initial investment of 1×100% full capacity feedpump set increased by 2 644.5 ×10^4 yuan per set, the annual net operating income could increase by 464.3 ×10^4 yuan. The loan interest rate was calculated at 6%, and the cost could be recovered in 8.2 a. Therefore, the comprehensive benefits of 1×100% full capacity feedwater pump set are higher.