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中国电机工程学报 2007, 27(2) 59-63 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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火电站直接空冷凝汽器性能考核评价方法 |
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杨立军 杜小泽 杨勇平 刘登瀛 |
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电站设备状态检测与控制教育部重点实验室（华北电力大学） 电站设备状态检测与控制教育部重点实验室（华北电力大学） 电站设备状态检测与控制教育部重点实验室（华北电力大学） 电站设备状态检测与控制教育部重点实验室（华北电力大学） |
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摘要：
火电站直接空冷凝汽器性能决定了直接空冷机组能否安全高效运行。研究直接空冷凝汽器性能的影响因素，从而制定空冷凝汽器性能考核评价方法具有重要意义。通过分析直接空冷凝汽器的传热过程，建立凝汽器压力与凝结蒸汽流量、冷却空气流量、凝汽器传热系数、凝汽器总传热面积以及环境温度之间的关系，分析各因素对凝汽器性能的影响规律。对以凝结蒸汽量和以凝汽器压力作为性能考核标准进行了对比研究，指出了2种性能考核评价方法存在的缺点，即仅仅考核凝汽器传热能力会导致传热面积过大，系统投资增加。在考核空冷凝汽器传热能力的基础上，还需测定凝汽器传热系数，以传热系数保证值作为直接空冷凝汽器性能考核的补充指标。 |
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关键词：
直接空冷
凝汽器
汽轮机背压
环境温度
传热系数
性能评价
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Performance Evaluation for Direct Air-cooled Steam Condensers in Power Plant |
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Abstract:
The performance of direct air-cooled steam condenser in power plant plays an important role in its safe and economical operation. It is important to establish the performance evaluation method by investigating the influences of various operating parameters on the direct air-cooled condenser performance. Based on the theoretical analysis of the heat transfer in direct air-cooled condenser, the correlation between the exhaust steam pressure and the saturated exhaust steam flow rate, cooling air flow rate, heat transfer coefficient and area of the condenser and the ambient temperature was presented. The influences of these parameters on the condenser performance were analyzed. The performance evaluations based on the saturated exhaust steam flow rate and exhaust steam pressure were compared and the shortcomings of these two methods were analyzed in which only the heat transfer capacity was examined thus the heat transfer area and the investment of condensers increased. Besides the heat transfer capacity, the heat transfer coefficient of direct air-cooled condenser should be taken into account. The heat transfer coefficient was suggested as another performance evaluation parameter. |
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Keywords:
direct air-cooled
steam condenser
exhaust steam pressure
ambient temperature
heat transfer coefficient
performance evaluation
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收稿日期 2006-04-10 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 杨立军 |
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作者简介: |
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作者Email: yanglj@ncepu.edu.cn;joy_365@sina.com |
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| 2．王松岭 赵文升 刘阳 林阿彪.直接空冷机组雾化增湿系统的数值研究[J]. 中国电机工程学报, 2008,28(29): 28-33 |
| 3．杜小泽 杨立军 金衍胜 姜建波 杨勇平.火电站直接空冷凝汽器传热系数实验关联式[J]. 中国电机工程学报, 2008,28(14): 32-37 |
| 4．周兰欣 杨靖 杨祥良.300MW直接空冷机组变工况特性[J]. 中国电机工程学报, 2007,27(17): 78-82 |
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