不同进汽温度火电机组多压冷端系统综合性能分析  

Performance Evaluation on Multi-Pressure Cold-end Systems of Thermal Power Plants With Different Inlet temperatures

作　　者：符悦 雷宇 刘明[1] 王进仕[1] 严俊杰[1] FU Yue;LEI Yu;LIU Ming;WANG Jinshi;YAN Junjie(State Key Laboratory of Multiphase Flow in Power Engineering(Xi’an Jiaotong University),Xi’an 710049,Shaanxi Province,China;Dongfang Electric Corporation,Chengdu 611731,Sichuan Province,China)

机构地区：[1]动力工程多相流国家重点实验室(西安交通大学),陕西省西安市710049 [2]中国东方电气集团,四川省成都市611731

出　　处：《中国电机工程学报》2022年第1期229-237,共9页Proceedings of the CSEE

基　　金：国家重点研发计划项目(2018YFB0604405)。

摘　　要：为提高燃煤机组的效率和降低机组的度电成本,该文建立多压冷端多参数多目标优化模型,以高参数超超临界机组为对象,分析凝汽器汽室数量和汽室面积对冷端系统的影响规律,优化获得不同参数等级机组的最优凝汽器汽室数量、凝汽器面积及冷却水流量,得到不同参数等级机组的冷端设计方案。结果表明:多压冷端较单压冷端的总投资的增加量随凝汽器总面积的增大先减少再趋于平缓。对不同进汽温度进组而言,主蒸汽参数越高,多压冷端的经济性越好。当机组的度电成本一样时,采用多压冷端的机组的效率大于单压冷端。To enhance the performance of coal-fired power plants and reduce the levelized cost of electricity,the multi-parameter and multi-objective optimization models of the cold-end systems with multi-pressure condensers were developed.With the high-parameter ultra-supercritical power plants as the reference cases,the influence of the number of steam condenser chambers and the areas of the condenser steam chambers on the cold end system were analyzed and the optimal number of condenser chambers,condenser area and cooling water flow rate were obtained.Moreover,the cold-end systems design schemes of power plants with different parameter grades were achieved.According to the analysis of the cold-end systems,the investment increase of multi-pressure cold-end compared with the single-pressure cold-end first decreased and then slowed down as the condenser total area increased.The optimization results of the cold-end systems in the different parameter levels power plants showed that the larger the main steam parameter,the better the economy of the multi-pressure cold-end.When the levelized cost of electricity wass the same,the efficiency of the unit with multi-pressure cold end was greater than that of the single pressure cold end.

关 键 词：冷端系统 多压凝汽器 遗传算法 多参数多目标优化 

分 类 号：TK11[动力工程及工程热物理—热能工程]