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zhi jie kong leng ning qi qi guan wai ji hui te xing yan jiu
Author(s): 
Pages: 40-43
Year: Issue:  5
Journal: Energy Conservation

Keyword:  直接空冷凝汽器积灰换热性能清洁系数最佳清洗周期;
Abstract: 分析积灰对凝汽器换热性能的影响,给出积灰后凝汽器传热系数和压力的计算模型,并根据某电厂600MW机组夏季工况的实际数据,得出传热系数、凝汽器压力随积灰厚度的变化关系.定义了管外壁清洁系数,以此量化了空冷凝汽器脏污程度.基于管外壁清洁系数的计算模型,得到了空冷岛的最佳清洗周期.结果表明:积灰对直接空冷凝汽器换热性能有重要影响.凝汽器积灰厚会导致凝汽器换热热系数降低,凝汽器压力升高;环境温度对空冷凝汽器最佳清洗周期的影响显著,最佳清洗周期随环境温度的升高而减小.
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