Research on air distribution of a high-density power computer room in Shanghai

The high-density power computer room of a project in Shanghai is transformed from an original scientific research building. The average power of single cabinet is 8 kW and the elastic power is 15 kW. The terminal air conditioning units of the computer room are water-cooled special precision air conditioning units for the computer room, and the configuration principle is X+N（N＜5，X=1; 5≤N＜10，X=2）. The supply / return temperature of chilled water is 18 ℃/24 ℃. The air distribution form of non-overhead floor diffused air supply, closed heat channel and ceiling return air is adopted in the computer room. The air supply temperature of the air conditioning units is 24 ℃, and the speed of the EC fans is controlled according to the return air temperature. When the air conditioning units failure (adjacent two and non-adjacent two), the thermal environment of the computer room can still meet the requirement under three different conditions, such as continuous layout of 8 kW single cabinet, interval layout (empty one cabinet space) of 15 kW single cabinet, interval layout (empty two cabinet space) of two 15 kW single cabinets.