Waste heat recovery system for power transformation and distribution room

Abstract

The utility model discloses a power transformation and distribution room waste heat recovery system which comprises a power transformation and distribution room, a heat pump assembly is arranged outside the power transformation and distribution room, and the heat pump assembly is communicated with the power transformation and distribution room through a circulating air pipe. The heat pump assembly comprises an air source heat pump host; the circulating pipeline comprises an air supply main pipe and an air return main pipe, the air supply main pipe is connected with an air outlet of the heat pump main machine, the air return main pipe is connected with an air inlet of the heat pump main machine, and the air supply main pipe and the air return main pipe communicate with the power transformation and distribution room. And after the air source heat pump absorbs and utilizes heat energy in the air, the cooled air is sent back into the power transformation and distribution room through the air supply pipeline. The heat energy absorbed by the air source heat pump is finally transferred into water through the heat pump main machine, hot water is prepared through heating heat of equipment in the power transformation and distribution room, and waste heat of the power transformation and distribution room is fully utilized.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat utilization, in particular to a waste heat recovery system for a substation and distribution room. Background Technique

[0002] When the substation and distribution room operates, components such as transformers, high and low voltage cabinets, and cables will all generate heat to a certain extent. Generally, the area of the substation and distribution room is small, and the temperature inside the room is high. At the same time, the specification requires that the temperature of the substation and distribution room does not exceed 40°C. Generally, an air conditioning system is used to cool the room in the substation and distribution room, which wastes the heating power of the substation and distribution room. Content of the Utility Model

[0003] The purpose of the utility model is to provide a waste heat recovery system for a substation and distribution room to solve the problems put forward in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution:

[0005] A waste heat recovery system for a substation and distribution room includes a substation and distribution room, a heat pump assembly is arranged outside the substation and distribution room, and a circulating air duct is communicated between the heat pump assembly and the substation and distribution room;

[0006] The heat pump assembly includes an air source heat pump host;

[0007] The circulating pipeline includes a main air supply pipe connected to the air outlet of the heat pump host and a main air return pipe connected to the air inlet of the heat pump host, and the main air supply pipe and the main air return pipe are communicated with the substation and distribution room.

[0008] By arranging a circulating air duct between the air source heat pump host and the substation and distribution room through the heat pump assembly and the circulating air duct, the heat in the substation and distribution room can be brought to the air source heat pump host through the circulating air, and then the heat carried by the circulating air can be recovered by the air source heat pump host to achieve the purpose of recovering the heat in the substation and distribution room.

[0009] As a further scheme of the utility model: an exhaust fan for the substation and distribution room is provided on the side wall of the substation and distribution room. An exhaust fan is arranged on the substation and distribution room to make the substation and distribution room communicate with the outside, balance the air pressure inside and outside the room, and fresh air can also be supplemented for the substation and distribution room through the exhaust fan.

[0010] As a further solution of the present utility model: The air source heat pump main unit is connected to an air source heat pump water tank. Both the air source heat pump main unit and the air source heat pump water tank are located on a water tank platform, and the water tank platform is located outside the substation. By arranging the air source heat pump main unit and the air source heat pump water tank outside the substation, the water in the air source heat pump water tank can be heated by recovering the heat of the hot air in the circulating air duct, that is, by recovering the waste heat of the substation to heat the water, continuously generating hot water for production and living use.

[0011] As a further solution of the present utility model: At least one substation return air duct is provided below the main return air pipe, and the lower end opening of the substation return air duct is located at the bottom of the substation. Multiple substation return air ducts can be arranged according to the layout of the equipment in the substation for heat recovery at different positions.

[0012] As a further solution of the present utility model: At least one air supply branch pipe is connected to the lower end of the main air supply pipe. The air supply branch pipe is connected to the top of the substation, and the air supply branch pipe is located at a position on the substation away from the substation return air duct. By arranging the air inlet pipe at a position away from the return air duct, the length of the flow path of the cold air in the substation can be increased, thereby increasing the heat exchange between the equipment in the substation and the circulating air.

[0013] As a further solution of the present utility model: A transformer cabinet and high and low voltage cabinets are provided in the substation. A cable tray is provided on the transformer cabinet. The transformer cabinet, the high and low voltage cabinets, and the cable tray are all located close to the substation return air duct. The return air duct is close to the transformer cabinet, the high and low voltage cabinets, and the cable tray, and the heat generated by the transformer cabinet, the high and low voltage cabinets, and the cable tray can be quickly recovered and transmitted to the air source heat pump main unit through the air duct, and the heat recovered by the air source heat pump main unit can be reused.

[0014] As a further solution of the present utility model: The high and low voltage cabinet is provided with a high and low voltage cabinet air inlet and a high and low voltage cabinet air outlet. The high and low voltage cabinet air inlet is located at the lower part of the high and low voltage cabinet, and the high and low voltage cabinet air outlet is located at the upper part of the high and low voltage cabinet. By providing an air inlet and an air outlet on the high and low voltage cabinet, the heat exchange between the heat in the high and low voltage cabinet and the circulating air is increased, and the efficiency of heat recovery is improved.

[0015] As a further solution of the present utility model: A transformer return air duct is connected to the transformer cabinet, and the other end of the transformer return air duct is communicated with the substation return air duct. Since the transformer cabinet generates a large amount of heat, a return air duct is separately arranged on the transformer cabinet to increase the circulating air volume in the transformer cabinet, which can effectively recover the heat generated by the transformer cabinet and at the same time increase the heat dissipation effect of the transformer cabinet.

[0016] As a further solution of the utility model: the transformer return air duct is located at the top of the transformer cabinet, and the lower part of the transformer cabinet is provided with a transformer air inlet. By setting the air inlet at the bottom of the transformer cabinet, cold air can be forced to enter from the bottom of the transformer cabinet and discharged from the return air duct at the top of the transformer cabinet. Thus, the cold air can flow from the bottom to the top of the transformer cabinet, exchanging heat at all positions inside the transformer cabinet and increasing the heat recovery efficiency.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: in this application, the hot air in the substation is sent to the air source heat pump evaporator part through the return air duct. After the air source heat pump absorbs and utilizes the heat energy in the air, the cooled air is sent back into the substation through the supply air duct. The heat energy absorbed by the air source heat pump is finally transferred to water by the heat pump host to produce hot water. This system uses the air source heat pump to control the temperature in the substation not to exceed the specified temperature, ensuring the normal operation of the equipment; at the same time, hot water is produced by using the heat generated by the equipment in the substation, making full use of the waste heat in the substation. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the recovery system of this embodiment;

[0019] In the figure: 1 - substation, 2 - main return air duct, 3 - transformer return air duct, 4 - substation return air duct, 5 - supply air branch pipe, 6 - main supply air duct, 7 - air source heat pump host, 8 - air source heat pump water tank, 9 - water tank platform, 10 - substation exhaust fan, 11 - transformer cabinet, 12 - transformer cabinet air inlet, 13 - high and low voltage cabinet, 14 - high and low voltage cabinet air inlet, 15 - high and low voltage cabinet exhaust outlet, 16 - cable tray. Detailed Embodiment

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figure 1, in the embodiment of the present utility model, a waste heat recovery system for a substation and distribution room includes a substation and distribution room 1. In this example, the total power of the transformers in the substation and distribution room is 15,500 KW·A, the total heat power of the room is about 250 kw, and the heat power of the transformers is about 210 kw. The lowest temperature at the project location is 3°C, and the highest temperature is 31°C. A substation and distribution room exhaust fan 10 is provided on the side wall of the substation and distribution room 1. By setting an exhaust fan on the substation and distribution room 1, the substation and distribution room is connected to the outside to balance the air pressure inside and outside the room, and fresh air can also be supplemented to the substation and distribution room through the exhaust fan. A heat pump assembly is provided outside the substation and distribution room 1, and the heat pump assembly is connected to the substation and distribution room 1 through a circulating air duct.

[0022] The heat pump assembly includes an air source heat pump main unit 7, and the air source heat pump main unit 7 is connected to an air source heat pump water tank 8. Both the air source heat pump main unit 7 and the air source heat pump water tank 8 are located on a water tank platform 9, and the water tank platform 9 is located outside the substation and distribution room 1. The refrigeration power of the air source heat pump main unit 7 ≥ 250 kw, and the maximum temperature of the hot water produced is 55°C. The hot water is stored in the air source heat pump water tank 8, and the hot water is used for the domestic hot water of the factory. The air volume of the fan of the air source heat pump main unit 7 is 15,000 m 3 / h, and the air pressure is 2,000 pa. By arranging the air source heat pump main unit 7 and the air source heat pump water tank 8 outside the substation and distribution room 1, and recovering the heat of the hot air in the circulating air duct to heat the water in the air source heat pump water tank 8, the water temperature in the air source heat pump water tank 8 can be increased. That is, by recovering the waste heat of the substation and distribution room 1 to heat the water, hot water can be continuously produced for production and living use.

[0023] The circulating pipeline includes a supply air main pipe 6 connected to the air outlet of the heat pump main unit 7 and a return air main pipe 2 connected to the air inlet of the heat pump main unit 7. The supply air main pipe 6 and the return air main pipe 2 are connected to the substation and distribution room 1. By arranging a circulating air duct between the air source heat pump main unit 7 and the substation and distribution room 1 through the heat pump assembly and the circulating air duct, the heat in the substation and distribution room 1 can be brought to the air source heat pump main unit 7 through the circulating air, and then the heat carried by the circulating air can be recovered by the air source heat pump main unit 7 to achieve the purpose of recovering the heat of the substation and distribution room 1. At least one substation and distribution room return air duct 4 is provided below the return air main pipe 2, and the lower end opening of the substation and distribution room return air duct 4 is located at the bottom of the substation and distribution room 1. Multiple substation and distribution room return air ducts 4 can be arranged according to the layout of the equipment in the substation and distribution room 1 for heat recovery at different positions. The lower end of the supply air main pipe 6 is connected to at least one supply air branch pipe 5, and the supply air branch pipe 5 is connected to the top of the substation and distribution room 1. The supply air branch pipe 5 is located at a position on the substation and distribution room 1 far from the substation and distribution room return air duct 4. By arranging the air inlet pipe at a position far from the return air duct, the length of the flow path of the cold air in the substation and distribution room 1 can be increased, and then the heat exchange between the equipment in the substation and distribution room 1 and the circulating air can be increased.

[0024] In the substation and distribution room 1, there are a transformer cabinet 11 and high and low voltage cabinets 13. A cable tray 16 is provided on the transformer cabinet 11. The transformer cabinet 11, the high and low voltage cabinets 13, and the cable tray 16 are all located close to the return air duct 4 of the substation and distribution room. The return air duct is close to the positions of the transformer cabinet 11, the high and low voltage cabinets 13, and the cable tray 16, and can quickly recover the heat generated by the transformer cabinet 11, the high and low voltage cabinets 13, and the cable tray 16 and transmit it through the air duct to the air source heat pump main unit 7, and the heat recovered by the air source heat pump main unit 7 is reused. The high and low voltage cabinet 13 is provided with a high and low voltage cabinet air inlet 14 and a high and low voltage cabinet air outlet 15. The high and low voltage cabinet air inlet 14 is located at the lower part of the high and low voltage cabinet 13, and the high and low voltage cabinet air outlet 15 is located at the upper part of the high and low voltage cabinet 13. By providing an air inlet and an air outlet on the high and low voltage cabinet 13, the heat exchange between the heat in the high and low voltage cabinet 13 and the circulating air is increased, and the heat recovery efficiency is improved. A transformer return air duct 3 is connected to the transformer cabinet 11, and the other end of the transformer return air duct 3 is communicated with the return air duct 4 of the substation and distribution room. The transformer return air duct 3 is located at the top of the transformer cabinet 11, and a transformer air inlet 12 is provided at the lower part of the transformer cabinet 11. Since the transformer cabinet 11 generates a large amount of heat, a return air duct is separately arranged on the transformer cabinet 11 to increase the circulating air volume in the transformer cabinet 11, which can effectively recover the heat generated by the transformer cabinet 1, and at the same time, the heat dissipation effect of the transformer cabinet 11 can be increased. An air inlet is provided at the bottom of the transformer cabinet 11, which can force cold air to enter from the bottom of the transformer cabinet 11 and be discharged from the return pipe at the top of the transformer cabinet 11. Thus, the cold air can flow from the bottom to the top of the transformer cabinet 11, and heat exchange is carried out at all positions in the transformer cabinet 11, increasing the heat recovery efficiency.

[0025] In this embodiment, the heat generated by the equipment in the substation and distribution room 1 is converted into the cold air flow by heat exchange with the flowing cold air, and at the same time, the equipment can be cooled. The heated hot air enters the air source heat pump main unit 7 through the return air main pipe 2. After the hot air is cooled by the evaporator of the air source heat pump main unit 7, it is discharged from the evaporator air outlet pipe and enters the supply air main pipe 6, and is sent into the substation and distribution room from the top of the substation and distribution room through the supply air branch pipe 5. At the same time, the water in the air source heat pump water tank 8 is heated. In this embodiment, hot water with a maximum temperature of 55 °C is prepared, and the hot water is stored in the air source heat pump water tank 8, and the hot water is used for the domestic hot water of the factory.

[0026] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0027] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A waste heat recovery system for a substation and distribution room, comprising a substation and distribution room (1), characterized in that, A heat pump assembly is provided outside the power transformation and distribution room (1), and the heat pump assembly is communicated with the power transformation and distribution room (1) through a circulating air duct; The heat pump assembly includes an air source heat pump main unit (7); The circulating air duct includes a supply air main pipe (6) connected to the air outlet of the heat pump main unit (7) and a return air main pipe (2) connected to the air inlet of the heat pump main unit (7), and the supply air main pipe (6) and the return air main pipe (2) are communicated with the power transformation and distribution room (1).

2. The waste heat recovery system for a variable substation according to claim 1, wherein A power transformation and distribution room exhaust fan (10) is provided on the side wall of the power transformation and distribution room (1).

3. The waste heat recovery system for a variable substation according to claim 1, characterized in that, The air source heat pump main unit (7) is connected to an air source heat pump water tank (8), and both the air source heat pump main unit (7) and the air source heat pump water tank (8) are located on a water tank platform (9), and the water tank platform (9) is located outside the power transformation and distribution room (1).

4. The waste heat recovery system for a substation according to claim 1, characterized in that At least one power transformation and distribution room return air duct (4) is provided at the lower part of the return air main pipe (2), and the lower end opening of the power transformation and distribution room return air duct (4) is located at the bottom of the power transformation and distribution room (1).

5. The waste heat recovery system for a substation according to claim 4, characterized in that, The lower end of the supply air main pipe (6) is connected to at least one supply air branch pipe (5), and the supply air branch pipe (5) is connected to the top of the power transformation and distribution room (1), and the supply air branch pipe (5) is located at a position on the power transformation and distribution room (1) far from the power transformation and distribution room return air duct (4).

6. The waste heat recovery system for a variable distribution substation according to claim 4, characterized in that, A transformer cabinet (11) and high and low voltage cabinets (13) are provided in the power transformation and distribution room (1), a cable tray (16) is provided on the transformer cabinet (11), and the transformer cabinet (11), the high and low voltage cabinets (13), and the cable tray (16) are all located close to the power transformation and distribution room return air duct (4).

7. The waste heat recovery system for a substation according to claim 6, wherein, The high and low voltage cabinet (13) is provided with a high and low voltage cabinet air inlet (14) and a high and low voltage cabinet air outlet (15), the high and low voltage cabinet air inlet (14) is located at the lower part of the high and low voltage cabinet (13), and the high and low voltage cabinet air outlet (15) is located at the upper part of the high and low voltage cabinet (13).

8. The waste heat recovery system for a variable substation according to claim 6, characterized in that, A transformer return air duct (3) is connected to the transformer cabinet (11), and the other end of the transformer return air duct (3) is communicated with the power transformation and distribution room return air duct (4).

9. The waste heat recovery system for a variable substation according to claim 8, characterized in that, The transformer return air duct (3) is located at the top end of the transformer cabinet (11), and a transformer air inlet (12) is provided at the lower part of the transformer cabinet (11).

Images