中文摘要：

以实际应用于600 MW间接空冷机组散热器中的福哥型四排翅片管为对象,进行流动和传热性能的热态风洞实验。根据实验数据,拟合得到了管束在不同迎面风速下的流动换热性能实验关联式。利用拟合出的实验关联式,以及典型600 MW间接空冷机组实际运行参数,建立低温环境下管束临界冻结长度的预测分析模型。在模型中考虑了迎面风速、平均环境空气温度以及机组负荷的影响。基于所建立的预测模型,以散热器临界冻结长度小于散热器总管长为基准,得到了间接空冷机组在不同迎面风速下,管内冷却水下降至0℃所对应的环境温度和机组负荷。研究结果可为600 MW间接空冷机组冬季低温防冻提供理论依据。

英文摘要：

The hot state wind tunnel experiments for flow and heat transfer performances are conducted by taking the Forgo type four-row finned-tube bundle as test section,which is actually applied for 600 MW indirect dry air-cooling unit.The experimental correlations of flow and heat transfer performance at various face velocity are presented through the experimental data.On the basis of fitting correlations and typical 600 MW indirect air cooling unit operating parameters,predicting analytical model regarding critical frozen length of finned tube is proposed,by which,the influences of different air flow velocities,average ambient temperatures out of finned tube and power generating unit load are considered and obtained.As predicted by the model,the critical frozen lengths under different air-flow velocities,low ambient temperatures and unit loads can be obtained when the temperature of cooling water is lower than 0℃.The present study can benefit the anti-freezing for 600 MW indirect air cooling power plant during winter operation.