Mechanical ventilation model test with heat sources for main large plant dynamo floor in Hohhot Pumped-storage Underground Hydropower Station

Establishing 1∶20 reduced-scale model with heat sources, experimentally investigates the air distribution in large space with mechanical ventilation of up-supply and down-exhaust under 27 kinds of conditions including six inlet combination schemes with double rows and three rows inlets all in total 57 circular air inlets, three different supply air rates of 28 m³/h, 56 m³/h and 112 m³/h, and four sorts of heat source intensity. Adopts the dimensionless temperature and velocity. Based on non-uniform coefficient and energy efficiency coefficient principles, recommends the scheme of double rows of symmetrical circular air inlets.