Indoor substation ventilation system with targeted air supply

Abstract

The application discloses an indoor substation ventilation and heat dissipation system with targeted air supply, and belongs to the field of indoor substation ventilation and heat exchange. The heat dissipation system comprises a main transformer room, an air inlet, an air inlet pipeline, an air distribution air box, a sheet type radiator and an air outlet. The substation ventilation and heat dissipation system can guide the cooling air to the sheet type radiator of the main transformer through the air inlet pipeline and the air distribution air box, reduce the bypass flow of the cooling air, improve the heat exchange efficiency of the cooling air, effectively reduce the indoor ambient temperature of the main transformer room, reduce the ventilation volume of the cooling air, and then can reduce the output of the fan, and solve the problem of fan noise pollution.

Description

Technical Field

[0001] This invention belongs to the field of ventilation and heat exchange in indoor substations, and particularly relates to the field of targeted air supply to enhance heat exchange in main transformers. Background Technology

[0002] During peak electricity consumption periods, the load on the main transformer of an indoor substation increases dramatically. This increased load causes a large amount of heat to be generated in the core and windings of the main transformer. To ensure the safe and stable operation of the main transformer, it is necessary to dissipate this heat in a timely manner.

[0003] Currently, the main transformers in indoor substations in my country primarily utilize additional plate-type radiators to enhance heat dissipation. During the hot summer months, natural air cooling alone is insufficient to meet the transformer's cooling requirements. Therefore, fans are typically installed on the side walls of the transformer compartment to enhance air-side convective heat transfer through the plate-type radiators. For the main transformer in an indoor substation, over 80% of the heat generated is dissipated into the surrounding environment through the plate-type radiators. Therefore, achieving efficient heat dissipation from these radiators is crucial for improving the ventilation and heat dissipation efficiency of indoor substations.

[0004] Currently, in practical engineering, indoor substations typically have side and bottom air inlets, while exhaust outlets are usually located at the top of the substation and equipped with exhaust fans. However, in existing technologies, due to unreasonable airflow path design, a large amount of cooling air is directly bypassed, resulting in low ventilation and heat exchange efficiency in the main transformer room.

[0005] To ensure that different indoor substation ventilation methods can dissipate heat effectively under high-temperature and high-load conditions, there is an urgent need for a universal, precision-guided cooling air cooling fin radiator system to improve the ventilation and heat exchange efficiency of the main transformer room. Summary of the Invention

[0006] In view of this, the purpose of this invention is to provide a targeted air supply ventilation and heat dissipation system for indoor substations. This system is applicable to both side-intake and bottom-intake indoor substations, enabling targeted and precise air supply to the finned radiators, effectively improving the cooling effect of the cooling air on the main transformer, and ensuring the safe and stable operation of the main transformer under high temperature and high load conditions.

[0007] The technical solution of this application is as follows:

[0008] A targeted air supply ventilation and heat dissipation system for an indoor substation includes a main transformer room, an air inlet, an air inlet duct, an air distribution box, a plate-type radiator, and an exhaust outlet. The air inlet is located on the side wall of the main transformer room, and the exhaust outlet is located on the top of the main transformer room. One end of the air inlet duct is connected to the air inlet. The air distribution box has an air inlet and an air outlet, and the other end of the air inlet duct is connected to the air inlet. The plate-type radiator is located inside the main transformer room, and with the surface where the air outlet is located as the projection surface, the orthographic projection of the plate-type radiator on the air distribution box overlaps with the air outlet.

[0009] Furthermore, the air inlet is located on the side wall opposite to the air outlet of the air distribution box, and the plate radiator is located on the side of the air distribution box away from the air inlet duct.

[0010] Furthermore, the air inlet is located on a side wall adjacent to the air outlet in the air distribution box, and the plate-type heat sink is located above the air distribution box.

[0011] Furthermore, the length of the air distribution box is 80%-120% of the length of the finned radiator, the width is 80%-120% of the width of the finned radiator, and the thickness is 20%-30% of the length.

[0012] Furthermore, the air inlet is rectangular, and the center of the air inlet coincides with the center of the side wall on which it is located.

[0013] Furthermore, the air inlet is rectangular, and the length W of the air inlet is... d Ratio of the width W of the air distribution box to the width W d / W ranges from 0.8 to 0.9; the width T of the air inlet d The ratio of the thickness T of the air distribution box to T d / T ranges from 0.8 to 0.9.

[0014] Furthermore, the air intake duct is a retractable and detachable ventilation duct.

[0015] Furthermore, the two ends of the air inlet duct are detachably connected to the air inlet and the air distribution box respectively via fixed bases.

[0016] Furthermore, the air outlet is equipped with louvers.

[0017] Furthermore, an exhaust fan is installed at the exhaust vent.

[0018] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0019] The cooling system includes a main transformer room, an air inlet, an air inlet duct, an air distribution box, finned radiators, and an exhaust outlet. The air inlet duct and air distribution box guide the cooling air to the finned radiators of the main transformer for precise targeted air delivery, reducing the bypass volume of the cooling air, thereby improving the heat exchange efficiency of the cooling air, effectively reducing the ambient temperature inside the main transformer room, reducing the cooling air ventilation volume, and reducing the fan output.

[0020] Furthermore, the length of the air distribution box is 80%-120% of the length of the finned radiator, and the width is 80%-120% of the width of the finned radiator, which can ensure that the entire finned radiator is fully cooled by the cooling air; the thickness is 20%-30% of the length, which can make the cooling air discharged from the air outlet of the air distribution box as uniform as possible, while minimizing the space occupied by the air distribution box.

[0021] Furthermore, the length W of the rectangular air inlet d Ratio of the width W of the air distribution box to the width W d / W ranges from 0.8 to 0.9; the rectangular width T of the air inlet d The ratio of the thickness T of the air distribution box to T d The / T range is 0.8-0.9. The closer the size of the air inlet is to the size of the air outlet, the more uniform the cooling air will be when it is discharged from the air outlet, ensuring that the cooling air can evenly and fully cool the finned heat sink. At the same time, it facilitates the installation and connection of the air inlet duct and the air distribution box.

[0022] Furthermore, the air intake duct is a retractable and detachable ventilation duct. When the main transformer load is low or the temperature is low, the air intake duct and the air distribution box can be removed to reduce the airflow resistance during natural air cooling, improve cooling efficiency, facilitate installation and maintenance, and save indoor space for the main transformer.

[0023] Furthermore, an exhaust fan is installed at the exhaust vent to quickly expel the high-temperature air from the transformer room. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an indoor substation ventilation and heat dissipation system with targeted air supply provided by the present invention;

[0025] Figure 2 yes Figure 1 The diagram shows the structure of the air distribution box in the heat dissipation system;

[0026] Figure 3 yes Figure 2 The diagram shows the dimensions of the air distribution box.

[0027] Figure 4 This is a structural schematic diagram of another targeted air supply indoor substation ventilation and heat dissipation system provided by the present invention;

[0028] Figure 5 is Figure 4 Structure diagram of air distribution box in heat dissipation system.

[0029] Figure 6 is Figure 5 Size marking diagram of air distribution box.

[0030] In the drawings: 1, main transformer room, 2, air inlet, 3, air inlet pipeline, 4, air distribution box, 5, sheet type radiator, 6, air outlet, 11, bottom air outlet, 41, air inlet, 42, air outlet. DETAILED DESCRIPTION

[0031] In order to make the technical means, improvement features and purposes achieved by the present application more easily understandable, the present application will be clearly and completely described below in conjunction with the embodiments of the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative labor achievements belong to the protection scope of the present application.

[0032] With reference to Figure 1 and Figure 4 , an indoor substation ventilation and heat dissipation system provided in the embodiments of the present application includes: an air inlet 2 located on the side wall of a main transformer room 1, an air inlet pipeline 3, an air distribution box 4, a sheet type radiator 5 and an air outlet 6 located on the top of the main transformer room 1. The air distribution box 4 is provided with an air inlet 41 and an air outlet 42. One end of the air inlet pipeline 3 is connected with the air inlet 2, and the other end is connected with the air inlet 41. The sheet type radiator 5 is located inside the main transformer room 1. With the plane where the air outlet 42 is located as a projection plane, the orthographic projection of the sheet type radiator 5 on the air distribution box 4 overlaps the air outlet 42. An air outlet fan is installed at the air outlet 6.

[0033] The working principle of the present application is as follows: when the temperature difference between the inlet and outlet air is greater than or equal to 15℃, and the operating load of the transformer is higher than 60% of the rated load, the air outlet fan installed at the air outlet 6 is turned on. The cooling air enters the inside of the main transformer room 1 from the air inlet 2, is guided to the sheet type radiator 5 through the air inlet pipeline 3 and the air distribution box 4, and becomes high-temperature air after convection heat exchange with the sheet type radiator 5. The high-temperature air is discharged from the main transformer room 1 under the action of the air outlet fan at the top air outlet 6. The cooling air is guided to directly blow to the sheet type radiator through the air inlet pipeline and the air distribution box, the sheet type radiator is precisely targeted with the cooling air, the bypass amount of the cooling air is reduced, the heat exchange efficiency of the cooling air is improved, the indoor environment temperature of the main transformer room is effectively reduced, and the cooling air ventilation volume can also be reduced.

[0034] The present application is directed to different air inlet arrangement modes of the transformer substation, for the air distribution mode of bottom air inlet and top air outlet, the air distribution air box 4 is installed at the bottom of the sheet type radiator 5 considering the convenience of installation, for the air distribution mode of side air inlet and top air outlet, the air distribution air box 4 is arranged at the side of the sheet type radiator considering that the heat dissipation efficiency of the sheet type radiator side air inlet can be improved by about 6% compared with the bottom air supply mode, the air distribution air box 4 is arranged at the side of the sheet type radiator. The targeted air distribution mode can take into account the convenience of device installation and the improvement of heat dissipation efficiency, reduce the internal hot spot temperature of the main transformer, and improve the operation safety and stability of the main transformer.

[0035] Embodiment 1

[0036] Please refer to Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of an indoor transformer substation ventilation and heat dissipation system provided in the embodiment, Figure 2 is Figure 1 a structural schematic diagram of the air distribution air box in the ventilation and heat dissipation system.

[0037] The heat dissipation system comprises: an air inlet 2 located on the side wall of the main transformer chamber 1; an air outlet 6 located on the top of the main transformer chamber 1; one end of an air inlet pipe 3 is connected with the air inlet 2; an air distribution air box 4 has an air inlet 41 and an air outlet 42, the other end of the air inlet pipe 3 is connected with the air inlet 41, and the air outlet 42 is a louvered air outlet; the air inlet 41 is located on the side wall opposite to the air outlet 42 of the air distribution air box 4; a sheet type radiator 5 is located in the interior of the main transformer chamber 1, and the orthographic projection of the sheet type radiator 5 on the air distribution air box 4 overlaps with the air outlet 42.

[0038] The air inlet pipe 3 is a telescopic and detachable ventilation pipe.

[0039] The air inlet pipe 3 is detachably connected between the air inlet 2 and the air inlet 41 through the fixed base at both ends.

[0040] The working process of the embodiment is as follows: when the temperature difference between the inlet and outlet air is greater than or equal to 15 DEG C, and the transformer operating load is higher than 60% of the rated load, the air outlet fan installed at the air outlet 6 is opened, the cooling air enters the interior of the main transformer chamber 1 from the air inlet 2, is guided to the sheet type radiator 5 through the air inlet pipe 3 and the air distribution air box 4, becomes high-temperature air after convection heat exchange with the sheet type radiator 5, and is discharged from the main transformer chamber 1 under the action of the air outlet fan at the top air outlet 6.

[0041] Please refer to Figure 3 , Figure 3 is Figure 2The size of the air distribution plenum is shown in the figure. To ensure that the cooling air is uniformly discharged from the air outlet 42 under normal cooling air volume, and in combination with the structural size of the finned radiator in actual projects, the length L of the air distribution plenum 4 is 80%-120% of the length of the finned radiator 5, and the width is 80%-120% of the width of the finned radiator 5, so that the entire finned radiator can be fully cooled by the cooling air. The thickness is 20%-30% of the length, so that the cooling air discharged from the air outlet 42 of the air distribution plenum 4 is as uniform as possible, and the space occupied by the air distribution plenum 4 is as small as possible. According to the commonly used size of the finned radiator 5, the length L of the air distribution plenum 4 is 2-2.5 m, the width W is 0.8-1.2 m, and the thickness T is 0.4-0.5 m.

[0042] The air inlet 41 is rectangular, and the rectangular center of the air inlet 41 coincides with the rectangular center of the side wall where it is located. The rectangular length L c of the air inlet 41 is 0.8-0.9 times the length L of the air distribution plenum 4. c The rectangular width W of the air inlet 41 is 0.8-0.9 times the width W of the air distribution plenum 4. c c The closer the size of the air inlet to the size of the air outlet, the more uniform the cooling air discharged from the air outlet, which ensures that the cooling air can uniformly and fully cool the finned radiator. At the same time, it is convenient for the installation and connection of the air inlet pipeline 3 and the air distribution plenum.

[0043] The blade opening of the air outlet 42 can be adjusted according to the fin spacing of the finned radiator 5 to ensure that the airflow flowing out of the air outlet 42 can directly flow through the gap between the adjacent two fins of the finned radiator 5, thereby efficiently cooling the finned radiator 5 and reducing the airflow flow resistance.

[0044] In summary, the indoor substation ventilation and heat dissipation system provided in the embodiment can guide the cooling air to the main transformer finned radiator 5 through the air inlet pipeline 3 and the air distribution plenum 4 for precise targeted air supply, reduce the bypass flow of the cooling air, thereby improving the heat exchange efficiency of the cooling air, effectively reducing the indoor environment temperature of the main transformer, and can reduce the cooling air volume and the fan output, and solve the problem of fan noise pollution.

[0045] Embodiment 2

[0046] Please refer to Figure 4 and Figure 5 , Figure 4 is a structural schematic diagram of a targeted air supply indoor substation ventilation and heat dissipation system provided in the embodiment, Figure 5 is Figure 4 a structural schematic diagram of the air distribution plenum in the heat dissipation system.​

[0047] See Figure 4 The present invention discloses a targeted air supply ventilation and heat dissipation system for an indoor substation, comprising a main transformer compartment 1, a bottom ventilation opening 11, an air inlet 2, an air inlet duct 3, a distribution air box 4, a plate radiator 5, and an exhaust outlet 6. The air inlet 2 is located on the side wall of the main transformer compartment 1, and the exhaust outlet 6 is located on the top of the main transformer compartment 1. One end of the air inlet duct 3 is connected to the air inlet 2. The distribution air box 4 has an air inlet 41 and an air outlet 42. The air inlet 41 is located on a side wall of the distribution air box 4 adjacent to the air outlet 42. The bottom ventilation opening 11 is located directly above the air outlet 42, and the other end of the air inlet duct 3 is connected to the air inlet 41. The plate radiator 5 is located inside the main transformer compartment 1, and with the surface where the air outlet 42 is located as the projection surface, the orthographic projection of the plate radiator 5 on the distribution air box 4 overlaps with the bottom ventilation opening 11 and the air outlet 42.

[0048] The working process of this embodiment is as follows: When the temperature difference between the inlet and outlet air is greater than or equal to 15°C and the transformer operating load is higher than 60% of the rated load, the exhaust fan installed at the exhaust port 6 is turned on. Cold air enters the main transformer room 1 from the air inlet 2, and is guided through the air inlet pipe 3 and the air distribution box 4 through the bottom ventilation port 11 to the plate radiator 5. After convective heat exchange with the plate radiator 5, it becomes high-temperature air. The high-temperature air is discharged from the main transformer room 1 by the exhaust fan at the top exhaust port 6.

[0049] The air inlet duct 3 is a retractable and detachable ventilation duct.

[0050] The air inlet duct 3 is detachably connected to the air inlet 2 and the air outlet 41 at both ends via fixed bases.

[0051] Please refer to Figure 6 , Figure 6 yes Figure 5 A schematic diagram showing the dimensions of the air distribution box is provided. To ensure good uniformity of the cooling air discharged from the outlet 42 under normal cooling airflow conditions, and considering the structural dimensions of the plate radiator in the actual project, the length L of the air distribution box 4 is 2m-2.5m, the width W is 0.8m-1.2m, and the thickness T is 0.4m-0.5m.

[0052] The air inlet 41 is rectangular, and the center of the rectangular air inlet 41 coincides with the center of the rectangular sidewall on which it is located. The rectangular length W of the air inlet 41 is... d Ratio of the width W of the air distribution box to the width W d The / W range is 0.8-0.9. The rectangular width T of the air inlet 41 is... d Ratio of the thickness T of the air distribution box to T dThe range of T is 0.8-0.9. The closer the size of the air inlet to the size of the air outlet, the more uniform the cooling air can be discharged from the air outlet, ensuring that the cooling air can uniformly and fully cool the finned radiator. At the same time, it is convenient to install and connect the air inlet pipeline 3 with the air distribution air box.

[0053] The blade opening of the air outlet 42 of the air distribution air box can be adjusted according to the fin spacing of the finned radiator 5, so that the airflow flowing out of the air outlet 42 can directly flow through the gap between the adjacent two fins of the finned radiator 5, thereby efficiently cooling the finned radiator 5 and reducing the airflow flow resistance.

[0054] The above describes the preferred embodiments of the present application. It should be noted that, for those skilled in the art, optimization and improvement can be made on the premise of the principles of the present application, but these optimizations and improvements are within the scope of protection of the present application.

Claims

1. An indoor substation ventilation system for targeted air supply, characterized in that, The main transformer room (1), the air inlet (2), the air inlet pipeline (3), the air distribution air box (4), the sheet type radiator (5) and the air outlet (6) are included. The air inlet (2) is located on the side wall of the main transformer room (1), and the air outlet (6) is located on the top of the main transformer room (1). One end of the air inlet pipeline (3) is connected with the air inlet (2). The air distribution air box (4) is provided with an air inlet (41) and an air outlet (42), and the other end of the air inlet pipeline (3) is connected with the air inlet (41). The sheet type radiator (5) is located inside the main transformer room (1), and the orthographic projection of the sheet type radiator (5) on the air distribution air box (4) overlaps the air outlet (42) with the face where the air outlet (42) is located as the projection face. The air inlet (41) is located on one side wall of the air distribution air box (4) adjacent to the air outlet (42), and the sheet type radiator (5) is located above the air distribution air box (4). The air inlet (41) is rectangular, the length of the air inlet (41) W d The ratio of the width of the air inlet (41) to the width of the air distribution box (4) W W d / W ranges from 0.8 to 0.9; the width of the air inlet (41) T d The ratio of the thickness of the air inlet (41) to the thickness of the air distribution box (4) T T d / T ranges from 0.8 to 0.9.​​ 2. An indoor substation ventilation system according to claim 1, wherein, The air inlet (41) is located on the side wall of the air distribution air box (4) opposite to the air outlet (42), and the sheet type radiator (5) is located on the side of the air distribution air box (4) away from the air inlet pipeline (3).

3. The targeted air supply indoor substation ventilation and heat removal system of claim 1 or 2, wherein, The length of the air distribution air box (4) is 80%-120% of the length of the sheet type radiator (5), the width is 80%-120% of the width of the sheet type radiator (5), and the thickness is 20%-30% of the length.

4. The targeted air supply indoor substation ventilation and heat removal system of claim 1 or 2, wherein, The air inlet (41) is rectangular, and the center of the air inlet (41) coincides with the center of the side wall.

5. An indoor substation ventilation system according to claim 1, wherein, The air inlet pipeline (3) is a telescopic and detachable ventilation pipeline.

6. An indoor substation ventilation system according to claim 5, wherein, The air inlet pipeline (3) is detachably connected between the air inlet (2) and the air inlet (41) of the air distribution air box (4) through the fixing bases at both ends.

7. An indoor substation ventilation system according to claim 1, wherein, The air outlet (42) is provided with a louver.

8. An indoor substation ventilation system according to claim 1, wherein, An exhaust fan is arranged at the air outlet (6).

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