Research on using outdoor air to maintain positive pressure in a data center computer room

Studies the relationship between the number of outdoor air change rate in a data center computer room and the difference between indoor and outdoor pressure. Thinks that the estimated value of outdoor air supply rate is large by the air change rate method and the calculated value is small by the gap method according to the outdoor air supply rate recommended by relevant specifications. Suggests that the air leakage area should be added according to the overall tightness of the data center room and the number of door leaves  on the basis of the gap method, and the economic outdoor air change rate of the data center computer room should be 0.8 to 1.1 h-1.