过渡季节抽水蓄能电站排风系统布置方式模型试验研究

Model Test on the Layout of Exhaust System of Pumped Storage Power Station in Transition Season

为研究排风系统布置方式对排风效果的影响,以东北某待建抽蓄电站的地下厂房排风系统为研究对象,建立地上、地下两种布置方式的排风系统1/20的试验模型,在过渡季节不同排风机流量和不同厂房内阻抗的工况下进行模型试验。结果显示,厂房内阻抗减小、排风机流量增大时,排风系统内气流流速增大、厂房简化模型内负压增大,可通过提高排风系统的排风机流量或优化主厂房内设备布置减少阻抗来优化抽蓄电站排风系统的排风效果。地下式排风系统的风速和厂房简化模型内负压值大于地上式,可见本次试验中抽蓄电站地下式排风系统布置方式的排风效果更好。研究成果可为类似工程提供参考。

In order to study the effect of the layout of exhaust system on exhaust air,taking the exhaust system of underground powerhouse of a pumped storage power station to be built in Northeast China as the research object,geometric models of exhaust systems with different layouts was built by the radio of 1/20 and the model test was carried out under different conditions with different exhaust flow rate and impedance in transition season.The velocity of flow in the exhaust system and the negative pressure in the simplified model of underground powerhouse both increases when the impedance decreases or when the flow rate of the exhaust fan increases,thus the exhaust air effect of the exhaust system of pumped storage power station can be optimized by increasing the flow rate of the exhaust fan or optimizing the layout of equipment in underground powerhouse to reduce the impedance.The wind speed and the negative pressure in the simplified model of underground powerhouse of above-ground exhaust system are both larger than those in the underground exhaust system,the conclusion is obtained that the exhaust air affect the underground exhaust system better and the underground exhaust system is more suitable for pumped storage power station in these test.Research results can provide reference for the similar projects.