Water distribution method of superlarge refluxing type natural ventilation cooling tower

Abstract

The invention provides a water distribution method of a superlarge refluxing type natural ventilation cooling tower. The water distribution method includes steps of building a three-dimensional geometric model for nozzles and a three-dimensional geometric model for water distribution pipes; setting a first boundary condition; acquiring pressure difference between a water inlet side and a nozzle side of the three-dimensional geometric model for the nozzles according to the first boundary condition, preset first water distribution pipe flow quantity, turbulence energy equation and turbulent dissipation function equation; acquiring water flow resistance coefficient according to the pressure difference and water flow velocity of the nozzle; setting a second boundary condition; acquiring water flow quantity according to the second boundary condition, preset second water distribution pipe water flow, turbulence energy equation and turbulent dissipation function equation; acquiring water spraying density of a cooling tower according to water flow quantity of the nozzles, the number of the nozzles of the cooling tower and the total area of water spraying areas; and increasing water flow pressure on the water inlet side of the water distribution pipes when the water spraying density of the cooling tower is smaller than the preset water spraying density. By the water distribution method, uniformity and reliability of water distribution of the cooling tower can be improved.

Description

technical field [0001] The invention relates to the field of generator cooling, in particular to a water distribution method for an ultra-large counterflow natural draft cooling tower. Background technique [0002] At present, the countercurrent tower mostly uses the water distribution method combining the central shaft and the groove pipe. The water distribution tank is connected with the central shaft, the water distribution pipe is connected with the water distribution tank, and the lower part of the water distribution pipe is connected with a tee and divided into one or two sprinklers. [0003] At present, a simple one-dimensional calculation method is usually used for hydraulic calculation of water distribution to obtain an estimated value of spraying water density; [0004] This water distribution simulation method has the following disadvantages: [0005] 1) The current one-dimensional calculation method uses a large number of empirical formulas and empirical coeffi...

AI Technical Summary

Problems solved by technology

[0005] 1) The current one-dimensional calculation method uses a large number of empirical formulas and empirical coefficients, which will cause distortion in the calculation results of water distribution, resulting in poor water distribution uniformity in cooling towers

[0006] 2) The length of the water distribution pipe of a super-large cooling tower generally exceeds 30m, and the number of nozzles installed on a single water distribution pipe generally exceeds 60. The more complex the water distribution system, the more complex the error amplification will occur

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