Direct evaporative passive self-cooling deflector

Abstract

The invention relates to a direct evaporative passive self-cooling flow guide plate. The direct evaporative passive self-cooling flow guide plate is arranged in a cooling system of containment of a nuclear power plant and comprises a flow guide plate structural framework. A flow guide plate porous material cover layer is arranged on one side of the flow guide plate structural framework, a flow guide plate heat-insulation layer is arranged on the other side of the flow guide plate structural framework, a coolant channel is arranged on the flow guide plate structural framework and is connected with a flow guide plate moisture retention coolant water tank by a coolant access pipeline, the flow guide plate moisture retention coolant water tank is arranged on the top of the containment, and coolant diffusion holes are formed in the coolant channel and are communicated with the flow guide plate porous material cover layer. The direct evaporative passive self-cooling flow guide plate has the advantages that evaporative heat exchange mechanisms are added to the flow guide plate, temperature difference between air of descending sections and air in heated channels of ascending sections is increased, heat resistance of the system can be reduced, natural ventilation flow rates can be promoted, and accordingly the cooling capacity of the system can be improved.

Description

technical field [0001] The invention belongs to the field of cooling equipment, in particular to a direct evaporative passive self-cooling deflector. Background technique [0002] The traditional air deflectors in the containment cooling system of nuclear power plants use their sides to form air passages with the adjacent building surfaces to regulate air flow, thereby promoting the heat transfer process on the building surfaces. In the passive containment cooling system design of AP1000 third-generation nuclear power plant in the United States, the air deflector, the outer surface of the steel containment vessel and the inner surface of the concrete containment vessel constitute the reentrant air channel. According to theoretical calculations, this design can increase the heat exchange capacity of the system by more than 50%. The heat exchange in the ascending section of the reentrant channel is a heat-mass coupled dredging process. Using the technology of the present inve...

AI Technical Summary

Problems solved by technology

Traditional air deflectors do not have sufficient heat capacity and heat export capability. The heat is mainly carried away by surface air flow. When the radiation is strong, the deflector will heat up rapidly, reducing the intensity of radiation heat transfer and cannot be maintained at a high level.

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