Study On Ventilation Rules And Suitable Ventilation Methods For Underground Chambers Of Xianyou Pumped-storage Hydropower Station

Hydropower is renewable clean energy.According to information released by the2015 World Hydropower Conference,nearly one-fifth of the world's electricity comes from hydroelectric power.Hydropower has always been one of the most widely used renewable energy sources.China,Canada,Brazil and the United States are the world's largest producers of water and electricity.The prospects for the development of hydropower and energy in China are broad.In the ventilation and air conditioning operation system of underground power stations,the temperature and relative humidity inside the factory building are greatly affected by traffic tunnels.However,in some domestic power stations,the natural energy of the traffic tunnel is not fully used,resulting in energy waste.This paper uses the Xianyou pumped-storage power station as an example,and analyzes and demonstrates it through field measurement and CFD simulation.Sets the method of adjusting the air conditioner operation strategy according to the air parameters at the end of the traffic tunnel.In this paper,based on the 2017 full-year parameters provided by the power station,when the air temperature at the end of the tunnel is lower than25°C and the relative humidity is lower than 75%,natural ventilation can be used for the generator layer.When the air temperature at the end of the tunnel is lower than 25°C and the relative humidity is lower than 78%,mechanical ventilation may be used for the generator layer.When the air temperature is greater than this parameter,air conditioningventilation is required.At the same time,based on the actual winter measurement data,the use of natural ventilation in winter will not cause the temperature inside the factory to be too low.In the summer traffic hole test,when the 27 dehumidifiers in the traffic tunnel were not turned on,the relative humidity at the end of the traffic hole was measured as 94.5%.Therefore,the CFD simulation of the dehumidifier operation effect in the tunnel of the power station was conducted.It is concluded that the relative humidity at the end of the tunnel after the opening of all 27 dehumidifiers is 73%,and the relative humidity at the end of the tunnel reaches 77% when the dehumidifier is switched on at intervals of 1(14 stations in total).The relative humidity at the end of the tunnel at the dehumidifier interval of 2 units(9 units in total)was 82%.The simulation results are compared with the current ventilation operation strategy of the power plant,and the economic operation mode is recommended.Its control strategy also has reference significance for other power plants.