300MW汽轮机排汽通道出口速度分布对凝汽器传热端差的影响

The Study of Velocity Distribution of the Exit of the Exhaust Hood of 300MW Turbine Effect on Temperature Difference

介绍了300MW汽轮机组排汽通道出口速度分布对凝汽器传热端差的影响。通过对模型吹风实验,测出不同状态下的流场分布。理论分析和计算表明排汽通道出口速度分布不均匀会使凝汽器传热端差变大。通过改造排汽通道的结构,可使排汽通道出口速度分布均匀,因此可以提高电厂运行的经济性和安全性。

The thesis expresses velocity distribution of the exit of the exhaust hood of 300MW turbine effect on temperature difference of the condenser. By the blow test, the velocity distribution of the exhaust hood exit has been measured at different measure conditions. It is shown that temperature difference of the condenser is bigger in not uniform velocity distribution by calculating and theoretical analysis. Improving configuration of the exhaust hood of the turbine, it makes velocity distribution become uniform. So it can increase the economic results and security of operation power plant.