Transformer Cooler

Abstract

The present invention relates to the field of transformer cooling, and discloses a transformer cooler, including: a heat transfer path optimization module, which is used to quickly transfer heat from the high-heat area of ​​the transformer; and a dynamic thermal response module, which is used to dynamically adjust the cooling intensity according to the transformer load and temperature changes. Through the heat transfer path optimization module, the joint design and optimization of the heat pipe assembly, the microchannel heat exchanger and the phase change energy storage module, the rapid transfer and dissipation of heat in the high-heat area of ​​the transformer is achieved. In the heat pipe assembly, the evaporation end is arranged in the hot spot area of ​​the transformer winding to quickly absorb a large amount of heat generated locally, and the heat is transferred to the microchannel heat exchanger through the condensation end, thereby realizing efficient heat extraction. The microchannel heat exchanger further enlarges the heat exchange surface area between the heat and the cooling medium, and by optimizing the internal flow path, ensures the contact uniformity between the cooling oil and the cooling medium, thereby significantly improving the heat transfer efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of transformer cooling, in particular to a transformer cooler. Background Art

[0002] As an important equipment in the power system, the transformer will generate a lot of heat during its operation. If the heat cannot be dissipated in time, the transformer temperature will be too high, which will reduce the operating efficiency, shorten the service life, and even cause safety accidents. Therefore, the research and application of transformer cooling technology is of great significance in the field of power equipment.

[0003] Traditional transformer cooling technology mainly relies on natural cooling, forced air cooling, oil cooling and other methods. Although these methods can achieve heat dissipation to a certain extent, their cooling efficiency is limited under high load or high ambient temperature conditions. In addition, traditional cooling systems often lack dynamic adjustment capabilities and cannot adjust the cooling intensity in time according to the actual load and temperature changes of the transformer, resulting in low operating efficiency and high energy consumption of the cooling system. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a transformer cooler, which solves the problem of limited cooling efficiency under high load or high ambient temperature conditions. In addition, traditional cooling systems often lack dynamic adjustment capabilities and cannot adjust the cooling intensity in time according to the actual load and temperature changes of the transformer, resulting in low operating efficiency and high energy consumption of the cooling system.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A transformer cooler, characterized in that it includes:

[0006] Heat transfer path optimization module for rapid heat transfer from high heat areas of the transformer;

[0007] Dynamic thermal response module, used to dynamically adjust cooling intensity according to transformer load and temperature changes;

[0008] System structure optimization module, used to reduce cooling oil flow resistance and optimize cooling oil distribution;

[0009] Intelligent control module, used to monitor transformer temperature, flow and pressure data in real time and dynamically optimize cooling system operating parameters;

[0010] The heat transfer path optimization module includes a heat pipe assembly, a microchannel heat exchanger and a phase change energy storage module; the intelligent control module is integrated with a prediction algorithm for optimizing the operating parameters of the fan and the oil pump.

[0011] Preferably, the heat pipe assembly comprises a plurality of heat pipes arranged in parallel, the evaporation end of the heat pipe is connected to one side of the transformer, and the condensation end of the heat pipe is connected to the input end of the microchannel heat exchanger.

[0012] Preferably, the working fluid of the heat pipe is selected from ethanol, methanol or water, and the working temperature range is 60°C to 120°C.

[0013] Preferably, the hydraulic diameter of the microchannel heat exchanger is 200 to 1000 microns, and the inner wall thereof is coated with a nano-thermal conductive coating to enhance heat transfer performance.

[0014] Preferably, the heat transfer coefficient of the microchannel heat exchanger is determined by the following formula:

[0015] Nu=0.023·Re 0.8 ·Pr 0.4 ;

[0016] in,

[0017] h is the heat transfer coefficient;

[0018] Nu is the Nusselt number;

[0019] k is the thermal conductivity of cooling oil;

[0020] D h is the hydraulic diameter.

[0021] Preferably, the phase change energy storage module comprises a phase change energy storage material having a melting point of 70° C. to 90° C., and the heat storage capacity of the material is determined by the following formula:

[0022]

[0023] in:

[0024] Q PCM To store heat;

[0025] m PCM is the mass of phase change material;

[0026] h f is the latent heat of phase change;

[0027] c p is the specific heat capacity.

[0028] Preferably, the phase-change energy storage module is packaged in aluminum alloy and is provided with heat-conducting fins on the outside to improve the phase-change energy storage efficiency.

[0029] Preferably, the dynamic thermal response module adjusts the operating parameters of the fan and the oil pump through a PID control algorithm, and can complete the dynamic response of the cooling system within 5 seconds according to the real-time data of the temperature sensor.

[0030] Preferably, the intelligent control module of the cooler includes a deep learning algorithm that predicts future cooling demand using the following formula:

[0031] T future =αT current +βQ load +γu air ;

[0032] in:

[0033] T future To predict temperature;

[0034] T current is the current temperature;

[0035] Q load is the current load;

[0036] u air is the wind speed.

[0037] Preferably, a cooling system device for the transformer cooler comprises:

[0038] Heat pipe assembly;

[0039] Microchannel heat exchanger;

[0040] Phase change energy storage module;

[0041] Dynamic thermal response device;

[0042] Intelligent controller;

[0043] Among them, the heat pipe assembly quickly transfers heat from the high-temperature area of ​​the transformer and combines with the microchannel heat exchanger to achieve efficient heat dissipation. The phase change energy storage module is used for heat buffering, and the dynamic thermal response device and intelligent controller coordinately adjust the cooler operating parameters.

[0044] Working principle: The cooler quickly transfers the heat from the high-heat area of ​​the transformer to the microchannel heat exchanger through the heat pipe assembly. The heat pipe assembly uses the phase change heat transfer principle between the evaporation end and the condensation end to transfer heat from the transformer to the cooling system in an efficient manner. The microchannel heat exchanger further enhances the heat transfer process. Its hydraulic diameter is precisely designed, and the inner wall is coated with a nano-thermal conductive coating to greatly improve the heat transfer efficiency. During the cooling process, part of the heat is temporarily stored through the phase change energy storage module. The heat storage material in the phase change energy storage module absorbs heat and undergoes phase change, thereby achieving effective buffering and release of heat. This design can balance the changes in cooling demand caused by transformer load fluctuations and ensure the stability of the cooling system. The system optimizes the cooling oil flow path, reduces flow resistance and improves the distribution of cooling oil, so that the cooling oil can evenly cover the radiator and high-heat area, further improving the cooling efficiency. The cooler can dynamically adjust the operating parameters of the fan and oil pump through the PID control algorithm according to the actual load and real-time temperature changes of the transformer. This function can optimize the cooling intensity in a very short time, so as to quickly respond to the demand for heat changes and avoid cooling lag or excessive energy consumption. The cooler collects key operating data such as temperature, flow and pressure of the transformer in real time through sensors, and uses integrated deep learning algorithms to predict cooling needs. This adjustment capability ensures that the cooling equipment can enter the optimal operating state in advance, effectively improving the accuracy and energy efficiency of system operation.

[0045] The present invention provides a transformer cooler having the following beneficial effects:

[0046] 1. The heat transfer path optimization module of the present invention is a key technical link to achieve efficient heat dissipation of the cooler. This module mainly realizes the rapid transfer and dissipation of heat in the high-heat area of ​​the transformer through the joint design and optimization of the heat pipe assembly, microchannel heat exchanger and phase change energy storage module. In the heat pipe assembly, the evaporation end is arranged in the hot spot area of ​​the transformer winding to quickly absorb a large amount of heat generated locally, and transfer the heat to the microchannel heat exchanger through the condensation end, thereby realizing efficient heat extraction. The microchannel heat exchanger further enlarges the heat exchange surface area between the heat and the cooling medium, and by optimizing the internal flow path, ensures the uniformity of contact between the cooling oil and the cooling medium, thereby significantly improving the heat transfer efficiency. In addition, the phase change energy storage module plays a key role in dealing with thermal load fluctuations. The heat storage material absorbs heat under high temperature load and releases heat when the temperature drops, which greatly reduces the instantaneous pressure of the cooling system and improves the stability and buffering capacity of the cooling system.

[0047] 2. The dynamic thermal response module of the present invention significantly improves the adaptability of the cooler to load changes. By arranging temperature, pressure and flow sensors in the system, the module can monitor the operating status of the transformer in real time, transmit the temperature change signal to the control system, and realize the dynamic adjustment of the fan speed and oil pump flow. Especially under high load conditions, the module can quickly respond to the heat dissipation needs of the transformer, and ensure the timely improvement of the cooling intensity by optimizing the operating parameters of the fan and the oil pump; and under low load or no-load conditions, it can effectively reduce the operating intensity of the fan and the oil pump, thereby achieving the purpose of energy saving and consumption reduction. Through efficient dynamic response control, the operation of the cooler is always maintained in the optimal state, which not only improves the overall cooling efficiency, but also significantly extends the service life of the cooler components, providing reliable guarantee for the stable operation of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A perspective view of the present invention;

[0049] Figure 2 It is a schematic diagram of the present invention.

[0050] Among them, 1. transformer; 101. shell; 102. iron core; 103. winding; 2. heat pipe assembly; 3. connecting pipe; 4. microchannel heat exchanger. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] Example:

[0053] Please see attached Figure 1 -Attached Figure 2 , an embodiment of the present invention provides a transformer cooler, comprising:

[0054] Heat transfer path optimization module for rapid heat transfer from high heat areas of the transformer;

[0055] Dynamic thermal response module, used to dynamically adjust cooling intensity according to transformer load and temperature changes;

[0056] System structure optimization module, used to reduce cooling oil flow resistance and optimize cooling oil distribution;

[0057] Intelligent control module, used to monitor transformer temperature, flow and pressure data in real time and dynamically optimize cooling system operating parameters;

[0058] The heat transfer path optimization module includes a heat pipe assembly, a microchannel heat exchanger, and a phase change energy storage module; the intelligent control module integrates a prediction algorithm to optimize the operating parameters of the fan and oil pump;

[0059] Among them, the cooler quickly transfers the heat from the high-heat area of ​​the transformer to the microchannel heat exchanger through the heat pipe assembly. The heat pipe assembly uses the phase change heat transfer principle between the evaporation end and the condensation end to transfer heat from the transformer to the cooling system in an efficient manner. The microchannel heat exchanger further enhances the heat transfer process. Its hydraulic diameter is precisely designed, and the inner wall is coated with a nano-thermal conductive coating to greatly improve the heat transfer efficiency. During the cooling process, part of the heat is temporarily stored through the phase change energy storage module. The heat storage material in the phase change energy storage module absorbs heat and undergoes phase change, thereby achieving effective buffering and release of heat. This design can balance the changes in cooling demand caused by transformer load fluctuations and ensure the stability of the cooling system.

[0060] The heat pipe assembly comprises a plurality of heat pipes arranged in parallel, the evaporation end of the heat pipe is connected to one side of the transformer, and the condensation end of the heat pipe is connected to the input end of the microchannel heat exchanger.

[0061] The working fluid of the heat pipe is selected from ethanol, methanol or water, and the working temperature range is 60°C to 120°C.

[0062] The hydraulic diameter of the microchannel heat exchanger is 200 to 1000 microns, and its inner wall is coated with a nano-thermal conductive coating to enhance heat transfer performance.

[0063] The heat transfer coefficient of the microchannel heat exchanger is determined by the following formula:

[0064] Nu=0.023·Re 0.8 ·Pr 0.4 ;

[0065] in,

[0066] h is the heat transfer coefficient;

[0067] Nu is the Nusselt number;

[0068] k is the thermal conductivity of cooling oil;

[0069] D h is the hydraulic diameter.

[0070] The phase change energy storage module contains a phase change energy storage material with a melting point of 70°C to 90°C. The heat storage capacity of the material is determined by the following formula:

[0071]

[0072] in:

[0073] Q PCMTo store heat;

[0074] m PCM is the mass of phase change material;

[0075] h f is the latent heat of phase change;

[0076] c p is the specific heat capacity.

[0077] The phase change energy storage module is packaged in aluminum alloy and has thermal fins on the outside to improve the phase change energy storage efficiency.

[0078] The dynamic thermal response module adjusts the operating parameters of the fan and oil pump through the PID control algorithm, and can complete the dynamic response of the cooling system within 5 seconds based on the real-time data of the temperature sensor.

[0079] The chiller’s intelligent control module includes a deep learning algorithm that predicts future cooling needs using the following formula:

[0080] T future =αT current +βQ load +γu air ;

[0081] in:

[0082] T future To predict temperature;

[0083] T current is the current temperature;

[0084] Q load is the current load;

[0085] u air is the wind speed.

[0086] A cooling system device for a transformer cooler, comprising:

[0087] Heat pipe assembly;

[0088] Microchannel heat exchanger;

[0089] Phase change energy storage module;

[0090] Dynamic thermal response device;

[0091] Intelligent controller;

[0092] The heat pipe assembly quickly transfers heat from the transformer's high-temperature zone, and combines with the microchannel heat exchanger to achieve efficient heat dissipation. The phase change energy storage module is used for heat buffering, and the dynamic thermal response device and the intelligent controller coordinately adjust the cooler operating parameters.

[0093] The system optimizes the cooling oil flow path, reduces flow resistance and improves the distribution of cooling oil, so that the cooling oil can evenly cover the radiator and high-heat area, further improving the cooling efficiency. The cooler can dynamically adjust the operating parameters of the fan and oil pump through the PID control algorithm according to the actual load and real-time temperature changes of the transformer. This function can complete the optimization and adjustment of the cooling intensity in a very short time, so as to quickly respond to the demand for heat changes and avoid cooling lag or excessive energy consumption. The cooler collects key operating data such as temperature, flow and pressure of the transformer in real time through sensors, and uses integrated deep learning algorithms to predict cooling needs. This adjustment capability ensures that the cooling equipment can enter the optimal operating state in advance, effectively improving the accuracy and energy efficiency of system operation.

[0094] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Transformer cooler, characterized in that: include: Heat transfer path optimization module for rapid heat transfer from high heat areas of the transformer; Dynamic thermal response module, used to dynamically adjust cooling intensity according to transformer load and temperature changes; System structure optimization module, used to reduce cooling oil flow resistance and optimize cooling oil distribution; Intelligent control module, used to monitor transformer temperature, flow and pressure data in real time and dynamically optimize cooling system operating parameters; The heat transfer path optimization module includes a heat pipe assembly, a microchannel heat exchanger and a phase change energy storage module; the intelligent control module is integrated with a prediction algorithm for optimizing the operating parameters of the fan and the oil pump.

2. The transformer cooler according to claim 1, characterized in that: The heat pipe assembly comprises a plurality of heat pipes arranged in parallel, the evaporation end of the heat pipe is connected to one side of the transformer, and the condensation end of the heat pipe is connected to the input end of the microchannel heat exchanger.

3. The transformer cooler according to claim 1 or 2, characterized in that: The working fluid of the heat pipe is selected from ethanol, methanol or water, and the working temperature range is 60°C to 120°C.

4. The transformer cooler according to claim 1, characterized in that: The hydraulic diameter of the microchannel heat exchanger is 200 to 1000 microns, and the inner wall thereof is coated with a nano-thermal conductive coating to enhance heat transfer performance.

5. The transformer cooler according to claim 1, characterized in that: The heat transfer coefficient of the microchannel heat exchanger is determined by the following formula: in, h is the heat transfer coefficient; Nu is the Nusselt number; k is the thermal conductivity of cooling oil; D h is the hydraulic diameter.

6. The transformer cooler according to claim 1, characterized in that: The phase change energy storage module comprises a phase change energy storage material having a melting point of 70°C to 90°C, and the heat storage capacity of the material is determined by the following formula: in: Q PCM To store heat; m PCM is the mass of phase change material; h f is the latent heat of phase change; c p is the specific heat capacity.

7. The transformer cooler according to claim 1, characterized in that: The phase-change energy storage module is packaged in aluminum alloy and is provided with heat-conducting fins on the outside to improve the phase-change energy storage efficiency.

8. The transformer cooler according to claim 1, characterized in that: The dynamic thermal response module adjusts the operating parameters of the fan and the oil pump through the PID control algorithm, and can complete the dynamic response of the cooling system within 5 seconds according to the real-time data of the temperature sensor.

9. The transformer cooler according to claim 1, characterized in that: The cooler’s intelligent control module includes a deep learning algorithm that predicts future cooling demand using the following formula: T future =αT current +βQ load +γu air ; in: T future To predict temperature; T current is the current temperature; Q load is the current load; u air is the wind speed.

10. A cooling system device for the transformer cooler according to claim 1, characterized in that: include: Heat pipe assembly; Microchannel heat exchanger; Phase change energy storage module; Dynamic thermal response device; Intelligent controller; Among them, the heat pipe assembly quickly transfers heat from the high-temperature area of ​​the transformer and combines with the microchannel heat exchanger to achieve efficient heat dissipation. The phase change energy storage module is used for heat buffering, and the dynamic thermal response device and intelligent controller coordinately adjust the cooler operating parameters.

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