Indoor transformer substation heat dissipation system and heat dissipation method

Abstract

The invention discloses a heat dissipation system and a heat dissipation method for an indoor transformer substation, and mainly solves the technical problems of poor heat dissipation effect and high energy consumption of a traditional heat dissipation means in an indoor transformer substation environment. The indoor heat absorption module comprises an indoor environment heat exchanger and an equipment heat exchanger which can be respectively arranged at different positions according to heat dissipation requirements, so that key heat dissipation of a high-heat-yield area is realized, the working energy consumption of the system is saved, the heat dissipation and cooling effects are improved, and the system is flexible and convenient to arrange. And through a phase change self-circulation mode of the phase change heat exchange working medium in the heat transmission pipe network, heat transmission is realized by virtue of self gravity of the phase change heat exchange working medium and gas-liquid conversion, so that the working energy consumption of the system can be greatly reduced, and the heat transmission efficiency is improved. In addition, each branch pipe obtains the liquid phase-change heat exchange working medium from the horizontal pipe in a relatively uniform and constant-speed manner through the liquid suction core, so that uniform backflow of the liquid phase-change heat exchange working medium can be effectively ensured, and the working stability and reliability of the system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy conservation and consumption reduction, and particularly relates to an indoor substation heat dissipation system and a heat dissipation method. Background Art

[0002] With the development of science and technology, the continuous enhancement of the national economy, and the gradual increase of the urbanization rate, the demand for electricity is also increasing continuously, and the power grid construction is constantly expanding. Indoor substations are an indispensable type in the construction of power grid substations. Indoor substations have the advantages of small floor area, higher safety, more convenient use and maintenance, and stronger scalability. However, compared with outdoor substations, the indoor space is limited, the equipment is intensive, and a large amount of heat is generated during operation, resulting in poor heat dissipation effect and corresponding increase in the ventilation and cooling energy consumption of heat dissipation equipment such as transformers. If the heat dissipation effect is not good, it may lead to overheating of equipment, reduced efficiency, and even cause failures. Therefore, effective refrigeration and heat dissipation technology is crucial for the stable operation of indoor substations.

[0003] The traditional heat dissipation method in the equipment room of indoor substations known to the inventors generally adopts a combination of natural air intake and mechanical exhaust. Natural ventilation relies on the temperature difference and wind force inside and outside the building for ventilation and heat dissipation, but the effect that can be achieved is limited under high temperature or large equipment load; mechanical ventilation is to install equipment such as fans in the indoor substation to forcibly ventilate and dissipate heat. When the natural air intake and mechanical exhaust method is adopted, the indoor air circulates with the outdoor air, making it inevitable for outdoor dust to enter the indoor, affecting the service life of power distribution equipment. And when the temperature in the equipment room cannot be reduced to the target value through the above two means, a split air conditioner needs to be set in the equipment room to reduce the temperature of the equipment room. However, the air conditioning system has high energy consumption and must be maintained regularly, resulting in a substantial increase in the heat dissipation cost in the substation. In addition, the temperature distribution in each equipment room of the indoor substation is unreasonable, and the temperature in some equipment areas is higher than that in other areas, while the air conditioning system cannot adaptively cool different areas, and it may still be impossible to effectively cool some areas under unnecessary energy consumption.

[0004] The information disclosed in this background art section is only used to deepen the understanding of the background art of the present disclosure, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0005] In view of at least one of the above technical problems, the present disclosure provides an indoor substation heat dissipation system and a heat dissipation method, mainly solving the technical problems of poor heat dissipation effect and high energy consumption of traditional heat dissipation means in the indoor substation environment.

[0006] According to one aspect of the present disclosure, there is provided an indoor substation heat dissipation system, which includes an indoor heat absorption module, an outdoor heat dissipation module that performs heat exchange with the indoor heat absorption module through a phase change heat transfer working fluid in a heat transfer pipe network, and a solar power supply module for providing electric energy required for the indoor heat absorption module and the outdoor heat dissipation module; the indoor heat absorption module includes a plurality of heat absorption units arranged in parallel, and each heat absorption unit includes an indoor environment heat exchanger and / or a device heat exchanger for attaching to the surface of the device to be cooled; the outdoor heat dissipation module includes at least one outdoor radiator; the heat transfer pipe network includes a vertical pipe with the top corresponding to and communicating with the outdoor heat dissipation module and the bottom connected to a horizontal pipe, and each heat absorption unit is connected to a corresponding position at the bottom of the horizontal pipe through a corresponding branch pipe.

[0007] In some embodiments of the present disclosure, the indoor environment heat exchanger includes an environment heat exchange coil, environment heat exchange fins arranged on the surface of the environment heat exchange coil, an environment heat exchange fan for enhancing air flow, and an environment temperature transmitter for monitoring the temperature at the indoor environment heat exchanger.

[0008] In some embodiments of the present disclosure, the device heat exchanger includes a heat exchange plate for attaching to the surface of the device to be cooled, a device heat exchange coil fixed at the heat exchange plate for performing corresponding heat exchange with the heat exchange plate, and a device temperature transmitter for monitoring the temperature at the device heat exchanger.

[0009] In some embodiments of the present disclosure, the outdoor radiator includes an outdoor heat exchange coil, outdoor heat exchange fins arranged on the surface of the outdoor heat exchange coil, an outdoor heat exchange fan for enhancing air flow, and an expansion air box for balancing the pressure in the heat transfer pipe network.

[0010] In some embodiments of the present disclosure, the horizontal pipe has a certain slope to ensure that the phase change heat transfer working fluid flows back to each branch pipe.

[0011] In some embodiments of the present disclosure, each branch pipe is inserted into the horizontal pipe to a certain depth at the bottom of the horizontal pipe, and a liquid suction core for the phase change heat transfer working fluid to flow back to the corresponding branch pipe is provided at the pipe wall at the position where each branch pipe intersects with the pipe wall of the horizontal pipe.

[0012] In some embodiments of the present disclosure, the solar power supply module includes a solar panel and a storage battery electrically connected to the solar panel.

[0013] According to another aspect of the present disclosure, there is provided an indoor substation heat dissipation method, which is implemented based on the above indoor substation heat dissipation system, and includes the following steps: (1) Set the desired indoor temperature Ts1 and the desired device temperature Ts2; (2) Obtain the indoor environmental temperature T1 and the equipment temperature T2; (3) Compare the indoor desired temperature Ts1 with the indoor environmental temperature T1, and the equipment desired temperature Ts2 with the equipment temperature T2, and adjust the heat dissipation system to the corresponding operating mode: When T1 < Ts1 and T2 < Ts2, correspondingly turn off the environmental heat exchange fan of the indoor environmental heat exchanger and the outdoor heat exchange fan of the outdoor heat exchanger and enter the first operating mode; When T1 < Ts1 and T2 > Ts2, correspondingly turn off the environmental heat exchange fan of the indoor environmental heat exchanger and start the outdoor heat exchange fan of the outdoor heat exchanger and enter the second operating mode; When T1 > Ts1 and T2 < Ts2, correspondingly start the environmental heat exchange fan of the indoor environmental heat exchanger and the outdoor heat exchange fan of the outdoor heat exchanger and enter the third operating mode; When T1 > Ts1 and T2 > Ts2, correspondingly start the environmental heat exchange fan of the indoor environmental heat exchanger and the outdoor heat exchange fan of the outdoor heat exchanger and enter the fourth operating mode.

[0014] In some embodiments of the present disclosure, in the fourth operating mode, the working power of the environmental heat exchange fan and the outdoor heat exchange fan is greater than that in the third operating mode.

[0015] One or more technical solutions provided in the embodiments of the present application have at least any one of the following technical effects or advantages: 1. The indoor heat absorption module includes an indoor environmental heat exchanger and an equipment heat exchanger, which can be respectively arranged at different positions according to the heat dissipation requirements, so as to achieve key heat dissipation in high heat generation areas, which is beneficial to saving the system working energy consumption, improving the heat dissipation and cooling effect, and making the system layout flexible and convenient.

[0016] 2. Through the phase change self-circulation mode of the phase change heat transfer working fluid in the heat transfer pipeline network, relying on the self-gravity of the phase change heat transfer working fluid and the gas-liquid transformation to achieve heat transfer, the system working energy consumption can be greatly saved and the heat transfer efficiency can be improved.

[0017] 3. Each branch pipe obtains the liquid phase change heat transfer working fluid from the horizontal pipe relatively uniformly and uniformly through the liquid absorption core, which can effectively ensure the uniform return of the liquid phase change heat transfer working fluid and improve the working stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the indoor substation heat dissipation system in an embodiment of the present application.

[0019] Figure 2 It is a structural schematic diagram of the indoor environmental heat exchanger in an embodiment of the present application.

[0020] Figure 3 This is a schematic structural diagram of the equipment heat exchanger in an embodiment of the present application.

[0021] Figure 4 This is a schematic structural diagram of the outdoor radiator in an embodiment of the present application.

[0022] Figure 5 This is a cross-sectional view of the connection structure between the branch pipe and the horizontal pipe in an embodiment of the present application.

[0023] In each of the above figures, 1 is the indoor heat absorption module, 11 is the indoor environment heat exchanger, 111 is the environment heat exchange coil, 112 is the environment heat exchange fin, 113 is the environment heat exchange fan, 114 is the environment temperature transmitter, 12 is the equipment heat exchanger, 121 is the heat exchange plate, 122 is the equipment heat exchange coil, 123 is the equipment temperature transmitter, 2 is the heat transfer pipe network, 20 is the phase change heat transfer working fluid, 21 is the horizontal pipe, 22 is the vertical pipe, 23 is the branch pipe, 24 is the wick, 3 is the outdoor heat dissipation module, 31 is the outdoor radiator, 311 is the outdoor heat exchange coil, 312 is the outdoor heat exchange fin, 313 is the outdoor heat exchange fan, 314 is the expansion gas tank, and 4 is the solar power supply module. Detailed implementation manners

[0024] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. And the "connection" and "coupling" involved in the present application, unless otherwise specified, both include direct and indirect connections (couplings).

[0025] The programs involved or relied on in the following embodiments are all conventional programs or simple programs in the technical field, and those skilled in the art can make conventional selections or adaptive adjustments according to specific application scenarios.

[0026] The devices and the like involved in the following embodiments are all conventional commercially available products unless otherwise specified.

[0027] In order to better understand the technical solution of the present application, the above technical solution will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation manners.

[0028] To solve the problem that the existing traditional heat dissipation system has uneven cold quantity distribution in the indoor substation use environment, cannot effectively dissipate heat from the key heat generation areas of the equipment, resulting in high energy consumption and poor heat dissipation effect, this example discloses an indoor substation heat dissipation system. SeeFigure 1 It includes an indoor heat absorption module 1, an outdoor heat dissipation module 3 that performs heat exchange with the indoor heat absorption module 1 through a phase change heat transfer working fluid in a heat transfer pipe network 2, and a solar power supply module 4 for providing electric energy required by the indoor heat absorption module and the outdoor heat dissipation module.

[0029] Since a large amount of heat is generated when the power conversion equipment in the indoor substation works, there is a large temperature difference between the power conversion equipment area and other areas. When using a traditional heat dissipation system to cool the substation building, because it is impossible to dissipate heat for a specific area, in order to make the power conversion equipment area with a large heat generation reach a suitable temperature, it is necessary to increase the working power of the traditional heat dissipation system. Thus, when the power conversion equipment area reaches a suitable temperature, the temperature of the remaining areas is much lower than the suitable temperature, and this process consumes a large amount of electric energy, increasing the operation burden and operation cost of the substation. And even so, in the indoor substation using the traditional heat dissipation system, the cooling effect is obvious in the area close to the heat dissipation system, while the area relatively far from the heat dissipation system cannot meet the temperature requirements.

[0030] Specifically, refer to Figure 1 In this embodiment, the indoor heat absorption module 1 is used to absorb the heat in the indoor substation building, so as to achieve the effect of cooling the building to a suitable temperature range. In order to enable the indoor substation with uneven heat distribution to uniformly reach the set suitable temperature range, the indoor heat absorption module 1 specifically includes a number of parallel heat absorption units. Among them, the heat absorption unit includes at least one indoor environment heat exchanger 11 and / or at least one equipment heat exchanger 12. The equipment heat exchanger 12 is used to attach to the surface of the power conversion equipment to mainly achieve the heat dissipation and cooling of the equipment area, and its layout quantity is set according to the equipment quantity and the equipment heat generation area; the indoor environment heat exchanger 11 is arranged in the non-equipment area to mainly achieve the heat dissipation and cooling of this area, and its layout quantity is set according to the space size and cooling demand of the non-equipment area.

[0031] Among them, refer to Figure 2 The indoor environment heat exchanger 11 includes an environment heat exchange coil 111, and environment heat exchange fins 112 are arranged on the surface of the environment heat exchange coil 111. Through the large contact area between the environment heat exchange fins 112 and the surrounding air, the heat exchange efficiency between the environment heat exchange coil 111 and the surrounding air is improved, so as to achieve the effect of accelerating heat exchange and then quickly dissipating heat and cooling down. In addition, in this embodiment, in order to further enhance the heat dissipation effect of the indoor environment heat exchanger 11 to meet higher heat dissipation requirements, the indoor environment heat exchanger 11 in this example further includes an environment heat exchange fan 113 to accelerate the air flow around the environment heat exchange fins 112, thereby achieving the purpose of improving the heat exchange efficiency. In addition, an environment temperature transmitter 114 is also arranged at the indoor environment heat exchanger 11 in this example to detect the surrounding environment temperature.

[0032] See Figure 3 Figure 3 , the equipment heat exchanger 12 is used to achieve the key heat dissipation in the substation equipment area. To achieve a good heat dissipation effect on the equipment, in this example, the equipment heat exchanger 12 includes a heat exchange plate 121 for attaching to the surface of the equipment to be cooled. The heat exchange plate 121 is made of metal. By the good heat conductivity of the metal heat exchange plate 121, the heat on the equipment surface is absorbed, so as to achieve the effect of cooling the equipment. In this embodiment, in order to further improve the heat exchange efficiency of the heat exchange plate 121, a heat conduction layer is provided between the heat exchange plate 121 and the surface of the substation equipment. The heat conduction layer uses an insulating heat-conducting material, which can achieve the technical effect of strengthening heat exchange, thus accelerating the heat dissipation and cooling at the substation equipment. In addition, an equipment heat exchange coil 122 is also provided at the heat exchange plate 121. Through the serpentine layout of the equipment heat exchange coil 122, as much heat of the equipment adsorbed by the heat exchange plate 121 as possible is taken away. In addition, in this embodiment, an equipment temperature transmitter 123 is also provided at the equipment heat exchanger 12 to monitor the temperature at the corresponding substation equipment.

[0033] To dissipate the heat adsorbed by the indoor heat absorption module 1, so as to achieve the purpose of relatively balanced heat dissipation and cooling of the indoor substation building environment and substation equipment, in this embodiment, the indoor substation heat dissipation system further includes an outdoor heat dissipation module 3. The outdoor heat dissipation module 3 is connected to the indoor heat absorption module 1 through a heat transfer pipe network 2, and thus the heat of the indoor heat absorption module 1 is dissipated to the outside through the outdoor heat dissipation module 3. Specifically, see Figure 1 Figure 1 , in this example, the outdoor heat dissipation module 3 includes at least one outdoor radiator 31, and the heat is diffused to the outdoor environment through the outdoor radiator 31. Among them, see Figure 4 Figure 4 , the outdoor radiator 31 includes an outdoor heat exchange coil 311, and outdoor heat exchange fins 312 are provided at the outdoor heat exchange coil 311. Through the large contact area between the outdoor heat exchange fins 312 and the outdoor air, a good heat diffusion effect is achieved. Considering that only natural diffusion of heat with the surrounding air can be achieved by relying on the outdoor heat exchange fins 312, to improve the heat exchange efficiency, in this embodiment, the outdoor radiator 31 further includes an outdoor heat exchange fan 313, and the air flow is accelerated through the outdoor heat exchange fan 313, so as to achieve the improvement of the heat exchange efficiency.

[0034] The environmental heat exchange coil 111 of the indoor environment heat exchanger 11, the equipment heat exchange coil 122 of the equipment heat exchanger 12, and the outdoor heat exchange coil 311 of the outdoor radiator 31 are respectively connected to the heat transfer pipe network. The heat is transported from the indoor to the outdoor through the phase change heat transfer working medium flowing in the heat transfer pipe network and transferring heat through phase change. Among them, considering that the heat transfer pipe network is relatively closed, in this example, the outdoor radiator 31 further includes an expansion gas tank 314 for balancing the pressure of the pipe network system.

[0035] In order to reduce the working energy consumption of the indoor substation cooling system, in this embodiment, refer to Figure 1 , the heat transfer pipe network 2 includes a horizontal pipe 21 and a vertical pipe 22 that is relatively perpendicular to the ground. The top of the vertical pipe 22 is correspondingly connected to the outdoor heat exchange coil 311 of the outdoor radiator 31, and the bottom of the vertical pipe 22 is correspondingly inserted into the pipe wall of the horizontal pipe 21, so that the phase change heat transfer working fluid in the vertical pipe 22 can automatically flow back into the horizontal pipe 21 under the action of gravity. In addition, the environmental heat exchange coil 111 of the indoor environment heat exchanger 11 and the equipment heat exchange coil 122 of the equipment heat exchanger 12 are respectively connected to the horizontal pipe 21 through corresponding branch pipes 23. Among them, each branch pipe 23 is respectively connected to the bottom of the horizontal pipe 21, so that the phase change heat transfer working fluid in the horizontal pipe 21 can flow back into the heat absorption unit under the action of gravity. Thus, the effective reduction of the energy consumption of the cooling system can be achieved.

[0036] Among them, in order to enable the phase change heat transfer working fluid in the horizontal pipe 21 to flow back into each branch pipe 23 smoothly, the horizontal pipe 21 is set to have a certain slight slope. Specifically, in this example, the vertical pipe 22 is connected to the middle position of the horizontal pipe 21, and the horizontal pipes 21 on both sides of the vertical pipe 22 are symmetrically inclined downward, with an inclination angle of 3 degrees. Thus, the phase change heat transfer working fluid entering the horizontal pipe 21 from the vertical pipe 22 can flow towards both ends of the horizontal pipe 21 in the slightly inclined horizontal pipe 21, so as to cover the corresponding interfaces of each branch pipe 23, and enable each branch pipe 23 to obtain the phase change heat transfer working fluid to participate in heat exchange and cooling.

[0037] In order to enable each branch pipe 23 to uniformly obtain the phase change heat transfer working fluid for heat exchange from the horizontal pipe 21, in this embodiment, refer to Figure 5 , each branch pipe 23 is inserted into the horizontal pipe 21 to a certain depth at the bottom position of the horizontal pipe 21, and the interface is sealed. A number of liquid absorbing cores 24 are fixedly arranged on the pipe wall of the branch pipe 23, and the liquid absorbing cores 24 are located at the bottom position of the liquid level of the phase change heat transfer working fluid in the horizontal pipe 21. Thus, since the liquid level height in the horizontal pipe 21 is lower than the height at which each branch pipe is inserted into the horizontal pipe, the phase change heat transfer working fluid can only enter each branch pipe 23 uniformly through the liquid absorbing cores 24, and since the liquid absorption speed of each liquid absorbing core 24 is basically the same, the phase change heat transfer working fluid in the horizontal pipe 21 can enter each branch pipe 23 relatively uniformly. Furthermore, the working stability and heat dissipation reliability of the cooling system are ensured. In some other embodiments, in order for each branch pipe to quickly obtain the phase change heat transfer working fluid, in this example, the liquid absorbing cores 24 are omitted and the through holes corresponding to the liquid absorbing cores on the pipe wall of the branch pipe in the previous example are retained, and the phase change heat transfer working fluid directly enters each branch pipe through this through hole.

[0038] In addition, in order to provide electrical energy required for the operation of the environmental heat exchange fan and the outdoor heat exchange fan, etc., refer to Figure 1, in this embodiment, the indoor substation heat dissipation system further includes a solar power supply module 4. Specifically, the solar power supply module 4 includes a solar panel 41 disposed outdoors and a storage battery 42 electrically connected to the solar panel 41. When the system needs energy during operation, the solar panel 41 directly supplies energy. When there is an excess of electrical energy, the surplus power is stored in the storage battery 42 for use when the energy obtained by the solar panel 41 is insufficient. In some other embodiments, the indoor substation heat dissipation system is also connected to a standby mains power supply to ensure the normal operation of the heat dissipation system when the solar panel 41 cannot obtain energy and the stored energy in the storage battery 42 is exhausted.

[0039] In addition, this example also discloses a method for dissipating heat from an indoor substation, which is implemented based on the above-mentioned indoor substation heat dissipation system, and specifically includes the following steps: (1) Set the desired indoor temperature Ts1 and the desired equipment temperature Ts2.

[0040] In this embodiment, the indoor substation heat dissipation system further includes a control unit, and specifically a PLC is used in this example. Before the heat dissipation system operates, the desired indoor temperature Ts1 and the desired equipment temperature Ts2 of the indoor substation are set through the control unit first. The heat dissipation system uses the above-set desired temperatures as the control basis to correspondingly control the working states of each module in the heat dissipation system, so that the environment and equipment temperature in the substation building meet the set requirements.

[0041] (2) Obtain the indoor ambient temperature T1 and the equipment temperature T2.

[0042] After the indoor substation heat dissipation system is started, the indoor ambient temperature T1 in the substation building and the equipment temperature T2 of the power transformation equipment are respectively and real-time monitored through the ambient temperature transmitter 114 at the indoor ambient heat exchanger 11 and the equipment temperature transmitter 123 at the equipment heat exchanger 12.

[0043] (3) Compare the indoor ambient temperature T1 with the set indoor desired temperature Ts1, compare the equipment temperature T2 with the set equipment desired temperature Ts2, and correspondingly control and adjust the operation mode of the indoor substation heat dissipation system according to the corresponding difference. Specifically, in this embodiment, the heat dissipation system has the following operation modes: When T1 < Ts1 and T2 < Ts2, the heat dissipation system is regulated to enter the first operating mode. In this operating mode, the ambient heat exchange fan of the indoor environment heat exchanger and the outdoor heat exchange fan of the outdoor heat exchanger are respectively turned off; at this time, the indoor substation relies on the phase change heat absorption and heat release of the phase change heat transfer working fluid flowing in the indoor environment heat exchanger, the equipment heat exchanger and the heat transfer pipe network to achieve heat dissipation. Specifically, in this operating mode, the equipment heat exchanger absorbs the heat emitted by the substation equipment through the heat exchange plate. When this heat is transferred to the equipment heat exchange coil of the equipment heat exchanger, the phase change heat transfer working fluid in the equipment heat exchange coil changes from liquid to gas, and the gaseous phase change heat transfer working fluid flows into the horizontal pipe along the corresponding branch pipe; at the same time, the indoor environment heat exchanger absorbs the heat in the surrounding environment through the ambient heat exchange fins and transfers it to the ambient heat exchange coil. At this time, the phase change heat transfer working fluid in the ambient heat exchange coil also changes from liquid to gas, and the gaseous phase change heat transfer working fluid also flows into the horizontal pipe along the corresponding branch pipe. Further, the gaseous phase change heat transfer working fluid in the horizontal pipe enters the outdoor radiator along the vertical pipe and conducts natural heat dissipation with the outdoor ambient air. As the heat dissipation progresses, the gaseous phase change heat transfer working fluid in the outdoor radiator changes from gas to liquid. Under the action of gravity, the liquid phase change heat transfer working fluid sequentially enters the indoor heat absorption module along the vertical pipe, the horizontal pipe and each branch pipe, thus forming a cycle to achieve the heat dissipation effect.

[0044] When T1 < Ts1 and T2 > Ts2, the heat dissipation system is regulated to enter the second operating mode. In this operating mode, the ambient heat exchange fan of the indoor environment heat exchanger is correspondingly turned off and the outdoor heat exchange fan of the outdoor heat exchanger is turned on; at this time, the indoor substation relies on the phase change heat absorption and heat release of the phase change heat transfer working fluid flowing in the indoor environment heat exchanger, the equipment heat exchanger and the heat transfer pipe network to achieve heat dissipation. Specifically, in this operating mode, the equipment heat exchanger absorbs the heat dissipated by the substation equipment through the heat exchange plate. When this heat is transferred to the equipment heat exchange coil of the equipment heat exchanger, the phase change heat transfer working fluid in the equipment heat exchange coil changes from liquid to gas, and the gaseous phase change heat transfer working fluid flows into the horizontal pipe along the corresponding branch pipe; at the same time, the indoor environment heat exchanger absorbs the heat in the surrounding environment through the ambient heat exchange fins and transfers it to the ambient heat exchange coil. At this time, the phase change heat transfer working fluid in the ambient heat exchange coil also changes from liquid to gas, and the gaseous phase change heat transfer working fluid also flows into the horizontal pipe along the corresponding branch pipe. Further, the gaseous phase change heat transfer working fluid in the horizontal pipe enters the outdoor radiator along the vertical pipe to dissipate heat with the ambient air outdoors. In the second operating mode, the outdoor radiator strengthens the heat exchange effect with the ambient air through the outdoor heat exchange fins and the outdoor heat exchange fan. As the heat dissipation progresses, the gaseous phase change heat transfer working fluid in the outdoor radiator changes from gas to liquid. Under the action of gravity, the liquid phase change heat transfer working fluid sequentially enters the indoor heat absorption module along the vertical pipe, the horizontal pipe and each branch pipe, thus forming a cycle to achieve the heat dissipation effect. Through the continuous circulation of the phase change heat transfer working fluid inside the heat dissipation system, the surface temperature T2 of the substation equipment continuously decreases. When T2 decreases to less than the set desired temperature Ts2 of the equipment, that is, when T2 < Ts2, the outdoor heat exchange fan is correspondingly turned off and the system enters the first operating mode.

[0045] When T1 > Ts1 and T2 < Ts2, the heat dissipation system is regulated to enter the third operating mode. In this operating mode, the environmental heat exchange fan of the indoor environment heat exchanger and the outdoor heat exchange fan of the outdoor heat exchanger are correspondingly turned on, and the environmental heat exchange fan and the outdoor heat exchange fan operate at low power. At this time, the indoor substation relies on the phase change heat absorption and heat release of the phase change heat transfer working fluid flowing in the indoor environment heat exchanger, the equipment heat exchanger, and the heat transfer pipe network to achieve heat dissipation. Specifically, in this operating mode, the equipment heat exchanger absorbs the heat emitted by the substation equipment through the heat exchange plate. When this heat is transferred to the equipment heat exchange coil of the equipment heat exchanger, the phase change heat transfer working fluid in the equipment heat exchange coil changes from liquid to gas, and the gaseous phase change heat transfer working fluid flows into the horizontal pipe along the corresponding branch pipe; at the same time, the indoor environment heat exchanger absorbs the heat in the surrounding environment through the environmental heat exchange fins and transfers it to the environmental heat exchange coil, and strengthens the heat exchange through the indoor environment heat exchange fan. At this time, the phase change heat transfer working fluid in the environmental heat exchange coil also changes from liquid to gas, and the gaseous phase change heat transfer working fluid also flows into the horizontal pipe along the corresponding branch pipe. Further, the gaseous phase change heat transfer working fluid in the horizontal pipe enters the outdoor radiator along the vertical pipe to dissipate heat with the outdoor ambient air. In the third operating mode, the outdoor radiator strengthens the heat exchange effect with the ambient air through the outdoor heat exchange fins and the outdoor heat exchange fan. As the heat dissipation progresses, the gaseous phase change heat transfer working fluid in the outdoor radiator changes from gas to liquid. Under the action of gravity, the liquid phase change heat transfer working fluid sequentially enters the indoor heat absorption module along the vertical pipe, the horizontal pipe, and each branch pipe, thus forming a cycle to achieve the heat dissipation effect. Through the continuous circulation of the phase change heat transfer working fluid inside the heat dissipation system, the indoor environmental temperature T1 of the substation continuously decreases. When T1 decreases to be less than the set indoor desired temperature Ts1, that is, when T1 < Ts1, the environmental heat exchange fan is correspondingly turned off.

[0046] When T1 > Ts1 and T2 > Ts2, the heat dissipation system is regulated to enter the fourth operating mode. In this operating mode, the ambient heat exchange fan of the indoor environment heat exchanger and the outdoor heat exchange fan of the outdoor heat exchanger are correspondingly turned on, and the ambient heat exchange fan and the outdoor heat exchange fan operate at high power. At this time, the indoor substation relies on the phase change heat absorption and heat release of the phase change heat transfer working fluid flowing in the indoor environment heat exchanger, the equipment heat exchanger, and the heat transfer pipe network to achieve heat dissipation. Specifically, in this operating mode, the equipment heat exchanger absorbs the heat dissipated by the substation equipment through the heat exchange plate. When this heat is transferred to the equipment heat exchange coil of the equipment heat exchanger, the phase change heat transfer working fluid in the equipment heat exchange coil changes from liquid to gas, and this gaseous phase change heat transfer working fluid flows into the horizontal pipe along the corresponding branch pipe; at the same time, the indoor environment heat exchanger absorbs the heat in the surrounding environment through the ambient heat exchange fins and transfers it to the ambient heat exchange coil, and the heat exchange is enhanced by the indoor environment heat exchange fan. At this time, the phase change heat transfer working fluid in the ambient heat exchange coil also changes from liquid to gas, and this gaseous phase change heat transfer working fluid also flows into the horizontal pipe along the corresponding branch pipe. Further, the gaseous phase change heat transfer working fluid in the horizontal pipe enters the outdoor radiator along the vertical pipe to dissipate heat with the outdoor ambient air. In the third operating mode, the outdoor radiator strengthens the heat exchange effect with the ambient air through the outdoor heat exchange fins and the outdoor heat exchange fan. As the heat dissipation progresses, the gaseous phase change heat transfer working fluid in the outdoor radiator changes from gas to liquid. Under the action of gravity, the liquid phase change heat transfer working fluid sequentially enters the indoor heat absorption module along the vertical pipe, the horizontal pipe, and each branch pipe, thus forming a cycle to achieve the heat dissipation effect. Through the continuous circulation of the phase change heat transfer working fluid inside the heat dissipation system, the ambient temperature T1 and the equipment temperature T2 in the substation continuously decrease. When T1 decreases to be less than the set indoor desired temperature Ts1, that is, T1 < Ts1, the ambient heat exchange fan is correspondingly turned off; when T2 decreases to be less than the set equipment desired temperature Ts2, that is, T2 < Ts2, the outdoor heat exchange fan is correspondingly turned off.

[0047] Although some preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0048] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of its inventive concept. Thus, if these modifications and variations to the present invention fall within the scope of the claims of this application and their equivalent technologies, this application also intends to include these changes and modifications.

Claims

1. An indoor substation heat dissipation system, characterized in that: It includes an indoor heat absorption module, an outdoor heat dissipation module that conducts heat exchange with the indoor heat absorption module through a phase change heat transfer working fluid in a heat transfer pipe network, and a solar power supply module for providing electric energy required by the indoor heat absorption module and the outdoor heat dissipation module; The indoor heat absorption module includes a number of heat absorption units arranged in parallel. The heat absorption unit includes an indoor environment heat exchanger and / or a device heat exchanger used to attach to the surface of the device to be cooled; the outdoor heat dissipation module includes at least one outdoor radiator; The heat transfer pipe network includes a vertical pipe with the top corresponding to and connected to the outdoor heat dissipation module and the bottom connected to a horizontal pipe. Each heat absorption unit is connected to a corresponding position at the bottom of the horizontal pipe through a corresponding branch pipe.

2. The indoor substation heat dissipation system according to claim 1, characterized in that: The indoor environment heat exchanger includes an environment heat exchange coil, environment heat exchange fins arranged on the surface of the environment heat exchange coil, an environment heat exchange fan for enhancing air flow, and an environment temperature transmitter for monitoring the temperature at the indoor environment heat exchanger.

3. The indoor substation heat dissipation system according to claim 1, characterized in that: The device heat exchanger includes a heat exchange plate used to attach to the surface of the device to be cooled, a device heat exchange coil fixed at the heat exchange plate for corresponding heat exchange with the heat exchange plate, and a device temperature transmitter for monitoring the temperature at the device heat exchanger.

4. The indoor substation heat dissipation system according to claim 1, characterized in that: The outdoor radiator includes an outdoor heat exchange coil, outdoor heat exchange fins arranged on the surface of the outdoor heat exchange coil, an outdoor heat exchange fan for enhancing air flow, and an expansion air box for balancing the pressure in the heat transfer pipe network.

5. The indoor substation heat dissipation system according to claim 1, characterized in that: The horizontal pipe has a certain slope to ensure that the phase change heat transfer working fluid flows back to each branch pipe.

6. The indoor substation heat dissipation system according to claim 1, characterized in that: Each branch pipe is inserted into the horizontal pipe to a certain depth at the bottom of the horizontal pipe, and a liquid suction core for the phase change heat transfer working fluid to flow back to the corresponding branch pipe is provided at the pipe wall at the position where each branch pipe intersects with the pipe wall of the horizontal pipe.

7. The indoor substation heat dissipation system according to claim 1, characterized in that: The solar power supply module includes a solar panel and a storage battery electrically connected to the solar panel.

8. A heat dissipation method for an indoor substation, characterized in that: Implemented based on the indoor substation heat dissipation system described in claim 1, including the following steps: (1) Set the desired indoor temperature Ts1 and the desired device temperature Ts2; (2) Obtain the indoor environment temperature T1 and the device temperature T2; (3) Compare the desired indoor temperature Ts1 with the indoor environment temperature T1, and the desired device temperature Ts2 with the device temperature T2, and adjust the heat dissipation system to the corresponding operating mode: When T1 < Ts1 and T2 < Ts2, correspondingly turn off the environment heat exchange fan of the indoor environment heat exchanger and the outdoor heat exchange fan of the outdoor heat exchanger to enter the first operating mode; When T1 < Ts1 and T2 > Ts2, correspondingly turn off the environment heat exchange fan of the indoor environment heat exchanger and start the outdoor heat exchange fan of the outdoor heat exchanger to enter the second operating mode; When T1 > Ts1 and T2 < Ts2, correspondingly start the environment heat exchange fan of the indoor environment heat exchanger and the outdoor heat exchange fan of the outdoor heat exchanger to enter the third operating mode; When T1 > Ts1 and T2 > Ts2, correspondingly start the environment heat exchange fan of the indoor environment heat exchanger and the outdoor heat exchange fan of the outdoor heat exchanger to enter the fourth operating mode.

9. The indoor substation heat dissipation method according to claim 8, characterized in that: In the fourth operating mode, the operating power of the ambient heat exchange fan and the outdoor heat exchange fan is greater than the operating power in the third operating mode.

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