抽水蓄能电站发电机层温度均匀性研究

温湿度作为衡量人体舒适度的重要指标,在水电站气流组织研究中具有重要的研究价值。采用现场测试与数值模拟相结合的方法,首先对水电站主厂房发电机层现场测试数据进行了分析,发现发电机层温度场的分布在空间上存在着不均匀性,为此对其成因进行了分析研究。研究结果表明,这种不均匀性是由发电机层不均匀的热源布置格局与空调送风口温度的差异所导致的。根据该结果,提出了调节空调冷却水流量的优化方案,拟通过间接控制空调出口的气流温度,来改善发电机层温度的均匀性。在此基础上,对主厂房发电机层温度场优化前后的工况进行了CFD数值计算,在验证计算模型可靠性的同时,将优化前后两种工况的计算结果进行了对比。对比结果表明:优化方案能显著降低发电机层温度的不均匀系数,改善发电机层温度的均匀性,具有一定的可行性。

Research on temperature uniformity of generator floor in pumped storage power station

Temperature and humidity, as important indexes of the human body's comfort, are important in the research of air flow organization of hydropower stations. By field test and numerical simulation, the field test data of generator floor of a main pumped powerhouse is analyzed. It is found that the distribution of temperature field in generator floor is not uniform in space due to the differences between the heat source layout of generator floor and the outlet temperature of air conditioner. Then an optimized scheme for adjusting the cooling water flow of the air conditioner is put forward to indirectly control the outlet air temperature of the air conditioner for improving the temperature uniformity of the generator floor. Thereafter a CFD numerical calculation of temperature field in generator floor before and after optimization is carried out. The reliability of the calculation model is verified. The comparison of the calculation results before and after the optimization shows that the optimized scheme can well improve the temperature uniformity of the generator floor.