Air conditioning system design for biosafety cabinets in biosafety laboratories

Presents the working principles of class ⅡA2 and class ⅡB2 biosafety cabinets ,common air exhaust modes and exhaust hood setting modes applied to air conditioning system. Calculates the cooling and heating loads of class ⅡA2 biosafety cabinets with exhaust hood in Beijing. Taking a project as an example, compares the different design schemes of air conditioning system for two kinds of biosafety cabinets. The results show that the system stability and energy consumption of the different schemes are different. The requirements on the necessary to set exhaust hood for class ⅡA2 biosafety cabinet are not clear in the existing biosafety cabinet specification, and it needs to be determined by the performance of the subjects. The air exhaust system of class ⅡB2 biosafety cabinets still needs further verification and discussion.