Air guide device for improving heat dissipation performance of indirect cooling tower under strong wind condition

Abstract

The utility model provides an air guide device for improving the heat dissipation performance of an indirect cooling tower under a strong wind condition, which comprises a rotatable air guide blade group arranged at a certain height above a cold triangular area of the indirect cooling tower, and the air guide blade group is a self-rotating windward air guide device or an electric leeward air guide device. According to the air guide device, by optimizing the aerodynamic characteristics of the indirect cooling tower, the efficiency of a heat dissipation system in a strong wind environment is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of power equipment heat dissipation optimization technology, and in particular to a wind guiding device for improving the heat dissipation performance of indirect cooling towers under high wind conditions. Background Technology

[0002] In power generation, when gale-force winds of level four or above blow tangentially towards the indirect cooling tower, the impact on unit load is significant. Actual observations show that strong winds can cause a maximum load drop of up to 400MW, meaning a sudden decrease from 1000MW to 600MW. The annual load loss per unit due to strong winds is approximately 120 million kW. h.

[0003] Indirect air-cooling systems operate well under light wind conditions, exhibiting excellent heat dissipation. However, their heat dissipation capacity deteriorates drastically under strong winds. A deeper analysis of the ambient wind conditions reveals that the airflow within the indirect air-cooling tower is driven by the buoyancy suction generated by the density difference between the inside and outside of the tower. Typically, the suction force of the air-cooling system is around (100-150) Pa. In a windless equilibrium state, the radiator resistance accounts for approximately half of the total resistance. When ambient wind blows past the air-cooling tower inlet, the conditions for the surrounding radiators present three different scenarios:

[0004] The windward side is located in the positive pressure zone. This area is equivalent to adding an extra positive pressure on top of natural suction, which increases the intake speed and enhances the heat dissipation capacity of the corresponding sector.

[0005] Side surface: This area is characterized by accelerated ambient wind. The local pressure in this region is significantly reduced, effectively lowering the original suction force. This leads to a decrease in intake air velocity, thereby reducing the heat dissipation capacity of the corresponding sector. Studies show that wind speeds greater than 4 m / s have a significant impact on the cooling effect of the radiator. For example, a wind speed of 5 m / s is equivalent to a 2.0°C increase in ambient temperature; a wind speed of 15 m / s is equivalent to a 14°C increase in ambient temperature. Furthermore, when the ambient side wind speed reaches 6.6 m / s, heat dissipation decreases by nearly 10%; when the wind speed reaches 8.5 m / s, heat dissipation decreases by nearly 25%. In addition, the accelerated flow field in the side radiator area also causes flow separation in the rear radiator area and deflection of the plume at the tower outlet. The crosswind forms a cylindrical flow field on the outer side of the radiator, with high lateral velocity and low pressure in the side region, reducing the amount of air flowing into the tower and severely affecting heat dissipation. In the lower part, lateral flow also affects the updraft flow, and the "through wind" that occurs in strong winds will further have an adverse effect on heat dissipation in the side and back areas.

[0006] Leeward side: Located in the vortex zone of the cylinder, this area is prone to generating vortices, which prevents hot air from flowing out smoothly, thus significantly reducing the heat dissipation capacity of the radiator in the corresponding position.

[0007] In summary, in windy climate zones, the problem of indirect air-cooled systems experiencing deteriorated heat dissipation capacity due to strong winds, leading to reduced unit load, urgently needs to be addressed. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides an air guiding device for improving the heat dissipation performance of indirect air-cooled towers under strong wind conditions. Specifically, by installing an air guiding device in the cold triangle area, the adverse effects of side winds and back winds on the radiator are reduced, thereby improving the heat dissipation performance of the indirect air-cooled system in windy conditions.

[0009] To solve the above-mentioned technical problems, the technical solution adopted in this application is as follows:

[0010] A wind-guiding device for improving the heat dissipation performance of an indirect cooling tower under strong wind conditions includes a rotatable wind-guiding blade assembly installed at a height above a certain height in the cold triangle area of ​​the indirect cooling tower. The wind-guiding blade assembly is a self-rotating windward wind-guiding device or an electrically powered leeward wind-guiding device.

[0011] Furthermore, the wind guide blade assembly includes blades arranged in layers at certain heights on the same axis.

[0012] Furthermore, each layer of the blades has three blades, spaced 120 degrees apart.

[0013] Furthermore, the air guide blade assembly is fixedly connected to the high cooling column assemblies on both sides via steel pipes.

[0014] Furthermore, the air guide blade assembly is positioned at the centroid of the cross-section of the indirect cooling tower.

[0015] Furthermore, the air guide blade assembly is positioned at a height of 12 meters or more in the cold triangle area.

[0016] Furthermore, the interval between adjacent upper and lower layers of blades is 1m.

[0017] Compared with existing technologies, the air guiding device of this application for improving the heat dissipation performance of indirect cooling towers under high wind conditions has the following beneficial technical effects:

[0018] This invention effectively improves the heat dissipation system efficiency in windy environments by optimizing the aerodynamic characteristics of the indirect cooling tower. Utilizing the synergistic effect of crosswind-driven rotating blades and electrically driven air guides, a directional rotating airflow is formed in the cooling triangle area, disrupting vortex stagnation on the leeward side and improving the uniformity of airflow distribution on the radiator surface. It can dynamically adjust the air guide intensity according to different wind directions, enhancing adaptability to strong winds in desert environments. This device fundamentally solves the problem of heat dissipation deterioration caused by strong winds, ensuring the stability of the unit's load, and possesses comprehensive advantages such as strong environmental adaptability, reliable operation, and convenient maintenance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the air guiding device used in this application to improve the heat dissipation performance of an indirect cooling tower under high wind conditions.

[0021] Figure 2 This is a schematic diagram of the structure of the electric back wind guide device of this application. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] See Figure 1 This application discloses an air guiding device for improving the heat dissipation performance of an indirect cooling tower under strong wind conditions. It includes a rotatable air guiding blade assembly 1 positioned at a certain height above the cold triangle region of the indirect cooling tower (when ambient wind acts on the indirect cooling tower, different airflow regions are formed on the side and leeward side of the tower; the cold triangle region refers to the area near the boundary between the side and leeward side of the indirect cooling tower, which is significantly affected by side and back winds, and is prone to problems such as airflow turbulence and reduced heat dissipation capacity). The air guiding blade assembly 1 acts as a fan, blowing air onto the heat exchanger in the cold triangle region of the indirect cooling tower, disrupting the vortex region around the cylinder, and improving the heat dissipation capacity of the radiator at the corresponding location.

[0024] Preferably, a self-rotating windward guide device is installed on the windward side, relying on wind power to rotate the blades; an electrically powered leeward guide device is installed on the leeward side, relying on motor 4 to drive the blades to rotate, see [link to relevant documentation]. Figure 2 .

[0025] In this application, the wind guide blade group 1 includes blades 3 arranged in layers at certain heights on the same axis.

[0026] In this application, three blades are arranged in each layer, spaced 120 degrees apart.

[0027] In this application, the air guide blade assembly 1 is fixedly connected to the high cooling column assembly 2 on both sides by steel pipes. For simplification purposes, it is not shown in the figure. Those skilled in the art will understand that various methods of fixing the air guide blade assembly 1 and the high cooling column assembly 2 by steel pipes are included in the scope of this application.

[0028] In this application, the air guide blade assembly 1 is located at the centroid of the cross-section of the indirect cooling tower.

[0029] In this application, the guide vane assembly 1 is positioned above 12 meters in the cold triangle area. Since the wind is relatively weak near the ground, the air guide device for the indirect cooling tower is installed at a height of 12 meters or higher to address the issue of lateral winds. For example, if the prevailing wind in a factory area is a strong east-west wind, an air guide device is installed in the south-facing direction. An air guide device with an electric actuator can be installed on the leeward side where the wind is strong to the west. When a strong wind blows, the air guide device is activated to blow air onto the indirect cooling triangle heat exchanger, disrupting the vortex zone around the cylinder and improving the heat dissipation capacity of the radiator at the corresponding location.

[0030] In this application, the adjacent upper and lower layers of blades are spaced 1m apart.

[0031] This application involves adding blades within a cooling triangle at the crosswind position. The crosswind blows the blades, causing them to rotate and creating a rotating airflow within the cooling triangle, thus cooling the radiator on the leeward side as well.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wind guide device for improving the heat dissipation performance of an intercooler tower under strong wind conditions, characterized in that, The application relates to a rotatable air guide vane group (1) arranged at a certain height above the cold triangle area of an indirect cooling tower, which is a self-rotating air guide device or an electrically-driven air guide device.

2. The apparatus of claim 1, wherein, The air guide vane group (1) comprises coaxially arranged vane layers (3) at a certain height interval.

3. The apparatus of claim 2, wherein, Each layer of the vane group is provided with three vane layers (3) at an interval of 120 degrees.

4. The apparatus of claim 1 wherein, The air guide vane group (1) is fixedly connected with two high cooling column groups (2) on both sides through steel pipes.

5. The apparatus of claim 4 wherein, The air guide vane group (1) is arranged at the center of the cross section of the indirect cooling tower.

6. The apparatus of claim 1, wherein, The air guide vane group (1) is arranged at a height of 12 meters above the cold triangle area.

7. The apparatus of claim 2 wherein, The adjacent upper and lower vane layers (3) are spaced apart by 1m.

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