Model Test Of The Air Conditioning And Ventilation In Xianyou Pumped Storage Power Station Underground Powerhouse

With the growing shortage of resources in today’s world, hydropower has beendeveloped unprecedentedly. A large number of pumped storage power stations havebeen gradually built at home and abroad. Electromechanical equipments are arrangedcomplexly in the equipment layer and the bus tunnel of the station’s undergroundpowerhouse. Heat dissipation of the equipments is uneven. Researches on the airdistribution of such space are not many at home and abroad. In the design of airconditioning and ventilation in hydropower station underground powerhouse,mechanical ventilation is always applied between different layers of the largeunderground powerhouse, exhaust air is discharged at the end of the bus tunnel. Thisarticle is based on the similar theory, the Archimedes number Ar is adopted asthe similar principle number. With reference to domestic and foreign ventilation modeltests of underground power station and the research experience on the ventilation andairflow model of the hydropower plant conducted by Professor Li Angui researchgroup by using2DPIV over the years, a geometric model of the main powerhouse wasbuilt by the ratio of1:50. Ventilation and airflow of the powerhouse was studied andanalyzed with2DPIV.Three different air velocity: V/V0=0.75、V/V0=1and V/V0=1.25(where V0is thedesigned air velocity in this model) and three different calorific value: Q/Q0=0.75、Q/Q0=1and Q/Q0=1.25(where Q0is the designed calorific value in this model) wereadopted in this experiment. The temperature field of the workspace in different layersof the main building including middle layer, turbine layer, spiral layer, and bus tunnel was measured firstly. The impact of mechanical ventilation on workspace temperaturefield in different layers and bus tunnel was studied at different air velocity and indifferent heat intensity. The velocity field of the bus tunnel was studied by using thetechnology of2DPIV, to explore the impact of mechanical exhaust on velocity field inbus tunnel at different air speed and in different heat intensity. This study provides areference for the air conditioning and ventilation design of the hydropowerstation underground powerhouse.