Antifreezing protection design of HVAC equipment for a north nuclear power station

Taking the freezing phenomenon of the air conditioning water coil in a northern nuclear power station as an example, according to the different principles of running water freezing and still water freezing，analyses and studies the freezing reasons of the air conditioning water coil. Proposes the measures to prevent the freezing of air conditioning cooling water coil and hot water coil, presents the advantages of the integrated upwind bypass heating coil in the aspect of antifreezing, and provides the methods for antifreezing design of HVAC equipment for nuclear power stations.