电站凝汽器改造后性能评价方法研究

Performance Evaluation of Power Plant Condensers After Retrofit

为弥补传统凝汽器性能评价方法的不足,采用考虑水阻变化的凝汽器性能评价方法,以某电站凝汽器改造方案决策为例,对比分析各改造方案对应的凝汽器改造前后水阻变化量,分析计算凝汽器水阻变化对冷却水体积流量和循环水泵耗功的影响,进而计算其对凝汽器整体性能的影响,最终评价出最优改造方案.结果表明:考虑水阻变化的凝汽器性能评价方法更合理、更具有实际意义,为凝汽器改造方案决策工作和凝汽器改造后性能评价工作提供了更科学的评价依据.

To overcome the deficiency of traditional performance evaluation method for power plant con- densers, a new method was proposed considering the water resistance. Based on the retrofit schemes for a certain power plant condenser, comparative analysis was conducted on the variation of water resistance be- fore and after retrofit among various schemes, while the effects of water resistance variation were studied on the cooling water flow, circulating pump＇s power consumption, and then on the overall performance of the condenser, so as to find out the optimum retrofit scheme. Results show that the performance evalua- tion method for condensers considering water resistance is more reasonable and practicable, which there- fore may serve as a reference for the decision of optimal retrofit scheme and for the follow up performance evaluation of condensers.