Cooling air flow guiding device of direct air cooling unit

Abstract

The invention discloses a cooling air deflector of a direct air cooling unit, which belongs to the technical field of energy power. The cooling air deflector of the direct air cooling unit is characterized in that 'V'-shaped air deflectors are arranged in a triangular passage space which is arranged between finned tube bundles at both sides of an air cooling unit, and symmetrically and respectively laid out at different positions in depth direction of the triangular passage and in 3 to 5 layers in height direction, which aims at reorganizing flow field at an air cooling fan outlet, so that the cooling air at the windward side of the air cooling finned tube bundles can flow uniformly, heat exchange of different parts of the finned tube bundles is uniform, and heat transfer area of the finned tube bundles is fully utilized, the performance of an air-cooled condenser can be improved to a certain degree, the back pressure of the unit is decreased, and the security and economy of the air cooling system operation are improved.

Description

technical field [0001] The invention belongs to the field of energy power. In particular, it involves the use of the uneven distribution of wind speed at the outlet of the air-cooled axial flow fan to realize the effective organization of the cooling air flow field, reduce the inhomogeneity of the cooling air flow velocity on the windward side of the air-cooled finned tube bundle, and achieve the purpose of uniform heat transfer on the surface of each part of the tube bundle. , to make full use of the heat transfer area of ​​the tube bundle and improve the performance of the air-cooled condenser as a direct air-cooling unit air guide device. Background technique [0002] The contradiction between rich coal and water shortage in my country's "Three North" regions has promoted the development of air-cooling technology for power stations. The direct air-cooled unit uses ambient air as the cooling medium for the exhaust steam of the steam turbine, and replaces the traditional w...

AI Technical Summary

Problems solved by technology

For the "A" type air-cooling unit structure, the air flow field on the windward side of the finned tube bundle is extremely uneven, resulting in uneven air temperature field, which makes the air-cooled finned tube bundle unable to fully play its role, resulting in a decline in the cooling effect of the air-cooling system, and the air-cooling unit. Flow and heat transfer characteristics need to be improved

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