基于凝汽器负挖的电厂直流式冷端系统优化研究  

Optimization Study of Power Plant Direct Flow Cold-end Subsystem Based on Negative Digging

作　　者：陈云 李森 赵元宾[3] CHEN Yun;LI Sen;ZHAO Yuanbin(Shanghai Electric Power Generation Engineering Co.,Ltd.,Minhang District,Shanghai 201199,China;CHN Energy Baoqing Coal Power&Chemical Co.,Ltd.,Shuangyashan 155600,Heilongjiang Province,China;School of Energy and Power Engineering,Shandong University,Jinan 250061,Shandong Province,China)

机构地区：[1]上海电气电站工程公司,上海市闵行区201199 [2]国能宝清煤电化有限公司,黑龙江省双鸭山市155600 [3]山东大学能源与动力工程学院,山东省济南市250061

出　　处：《发电技术》2022年第4期655-663,共9页Power Generation Technology

基　　金：国家自然科学基金项目(51606112)。

摘　　要：针对传统电厂冷端系统性能不稳定和年运行费用较高的问题,建立一种基于负挖深度的直流式冷端系统热力、阻力、土建和年运行费用计算的数学模型,由不同塔外工况得到冷端系统的最优化配置,分析冷却水进水温度、凝汽器面积单价和凝汽器负挖深度对冷端系统性能的影响,结果表明:降低冷却水进水温度和凝汽器面积单价可减少冷端系统的年运行费用,凝汽器负挖深度为3~5 m时冷端系统的各性能参数达到较大值,因此根据不同塔外气象参数选择冷端系统配置能提高电厂运行效率,并减少冷端系统的年运行费用。In view of the unstable performance of the cold-end system of traditional power plants and the high annual operating cost, a mathematical model based on the heat, resistance, civil construction and annual operating cost calculation of the direct flow cold end system based on negative digging depth was established, and the cold end system configuration was obtained from different conditions outside the tower. The optimal configuration was used to analyze the effect of cooling water for intlet tower water temperature, coagulator area unit price and condenser negative digging depth on the performance of cold end system. The results show that reducing the cooling water for intlet tower water temperature and condenser area unit price can reduce the annual operating cost of cold end system. The performance parameters of the cold end system with a negative digging depth of 3 to 5 m reach the lager value.Therefore, selecting the cold end system configuration according to different weather parameters outside the tower can improve the operating efficiency of the power plant and reduce the annual operating cost of the cold end system.

关 键 词：电厂 直流式冷端系统 冷端优化 负挖深度 年运行费用 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]