Air cooling island array control method based on temperature field and velocity field

Abstract

The invention belongs to the technical field of air cooling system controlling, and particularly relates to an air cooling island array control method based on a temperature field and a velocity field. The air cooling island array control method comprises the steps that environment temperature, face velocity, feed water flow, main steam quantity and condensated water outlet temperature of an air cooling unit are monitored in real time, steam quantity and heat quantity of each element of an air-cooling condenser are calculated, steam inlet temperature of a heat dissipating device of each cooling element of the air-cooling condenser is calculated, heat quantity generated by phase transition and condensation of water steam is calculated, then heat quantity generated by continuous cooling of condensated water is calculated, and according to heat dissipating capacity quantity, condensated water quantity is calculated; power dissipation and blast capacity of each air cooling element are measured and calculated; the heat transferring work efficiency of the air cooling elements is calculated, the rotating speed of high-efficiency draught fans can be heightened in an arrayed mode, the rotating speed of low-efficiency draught fans is lowered, the reasonable contribution of each draught fan is adjusted, therefore the optimum control of an air cooling island is achieved, the power consumption of the air cooling island is effectively reduced, and an air cooling island array control system can be operated stably, reliably and optimally.

Description

technical field [0001] The invention belongs to the technical field of air-cooling system control, in particular to an air-cooling island array control method based on a temperature field and a flow velocity field. Background technique [0002] The air-cooled island is a very important part of the direct air-cooled unit. In most parts of northern my country, this technology has been applied and promoted to a certain extent, which is of great significance for saving water resources and developing large-scale thermal power generating units. However, The air-cooled unit increases the consumption of electric energy while reducing the consumption of water resources, which accounts for a considerable proportion of the plant's electricity consumption. Therefore, how to control the distribution and adjust the best output of the axial flow fan of the air-cooling unit is the key to the problem of saving electric energy in the air-cooling island. Working performance will have a direct ...

AI Technical Summary

Problems solved by technology

However, the air-cooled island itself is a complex process including mechanical energy conversion, heat exchange and two-phase flow, which is nonlinear and consumes a lot of power. As a result, there is still a lack of reliable and effective methods for axial fan control.

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