A heat pipe type air conditioning system for mine

Abstract

The present invention discloses a heat pipe type air conditioning system for mine, comprising: a heat source collection component, including: a high-temperature electromechanical equipment heat dissipation cover configured with a nanofluid heat pipe connected to a pulsating heat pipe group; a medium-temperature mine water heat exchanger and a low-temperature return air passage heat exchange plate, which are connected to a phase change energy storage tank through the pulsating heat pipe group; a wellhead anti-freezing component, including a heat dissipation fin group connected to the nanofluid heat pipe; an underground temperature control component, including an absorption heat pump, a radiation panel, a dehumidification fresh air unit and a variable-frequency fan, wherein the input end of the absorption heat pump is connected to the nanofluid heat pipe and the phase change energy storage tank, and the output end is connected to the radiation panel, the dehumidification fresh air unit and the heat dissipation fin group, and the input end of the variable-frequency fan is connected to the radiation panel and the dehumidification fresh air unit, and the output end is led into the underground roadway; an intelligent control component includes a controller, which collects the data of each sensor in real time and realizes the control of each component. The present invention realizes the coordination of waste heat recovery and air conditioning, ensures the safety of the mine and reduces energy consumption.

Description

Technical Field

[0001] The present invention belongs to the technical field of mine air conditioning, and particularly relates to a heat pipe type air conditioning system for mines. Background Art

[0002] The mine air conditioning system is a key infrastructure for ensuring the safe production of mines. Currently, most mines generally adopt a central centralized ventilation system, where the return air is carried out through a dedicated air shaft, and the ventilated air is directly discharged into the atmosphere by a ventilator.

[0003] At the thermodynamic level, the underground mining space presents a typical deep geothermal effect, that is, the ground temperature increases with the increase of depth. In the actual underground coal mine mining process, generally speaking, below the constant temperature zone, for every 100 meters deep underground, the ground temperature will approximately increase by 3 degrees Celsius. And the temperature of the constant temperature zone usually remains around 15 degrees Celsius. Therefore, for a mine with an underground depth of 600 meters, its ground temperature may reach about 30 degrees Celsius. In addition, when the air flows through the underground roadway, it will have heat and moisture exchange with the surrounding rock of the roadway, and at the same time, the heat dissipation of large equipment in the mine will also be discharged into the return air. After these heats are superimposed, the temperature of the return air flow generally rises by 8 - 15 degrees Celsius compared with the intake air. However, currently, the return air of coal mines is directly discharged into the atmosphere, and a large amount of heat energy contained therein is not effectively utilized. Taking a mine with an annual output of 5 million tons as an example, the total amount of return air waste heat is equivalent to the calorific value of about 6,000 tons of standard coal, having considerable low - grade heat energy utilization value. However, the existing system directly discharges it as waste heat, causing energy waste and environmental heat pollution.

[0004] On the other hand, in order to ensure the anti - freezing requirement of the intake air shaft, coal mining enterprises usually need to use coal - fired boilers to produce steam and heat the intake air through heat exchange equipment. For coal mining enterprises, although it is very convenient to directly consume the coal produced by the mine, the efficiency of coal - fired boilers is relatively low, and coal is a non - recyclable energy source, which will also cause pollution after combustion. At the same time, burning the self - produced coal also reduces the amount of coal that can be sold externally, thereby reducing the profit of the enterprise.

[0005] Therefore, we propose a heat pipe type air conditioning system for mines to solve the above - mentioned technical problems. Summary of the Invention

[0006] In order to solve the technical problems existing in the above - mentioned prior art, the present invention proposes a heat pipe type air conditioning system for mines.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A heat pipe type air conditioning system for mines includes a heat source collection component, a wellhead anti - freezing component, an underground temperature control component, and an intelligent control component, wherein:

[0009] The heat source collection assembly includes a high-temperature electromechanical equipment heat dissipation cover, a medium-temperature mine water heat exchanger and a low-temperature return air channel heat exchange plate. The high-temperature electromechanical equipment heat dissipation cover is provided with a nanofluid heat pipe, and the nanofluid heat pipe is connected to a pulsating heat pipe group through a working fluid delivery pipeline. The medium-temperature mine water heat exchanger and the low-temperature return air channel heat exchange plate are connected to a phase change energy storage tank through a pulsating heat pipe group.

[0010] The wellhead antifreeze assembly includes a heat dissipation fin group and a humidity sensing coating, wherein the heat dissipation fin group is connected to the nanofluid heat pipe through a working fluid delivery pipeline, and the humidity sensing coating is attached to the surface of the heat dissipation fin group;

[0011] The underground temperature control component includes an absorption heat pump, a radiation plate, a dehumidification fresh air unit and a variable frequency fan. The nanofluid heat pipe and the phase change energy storage tank are connected to the input end of the absorption heat pump, the radiation plate, the dehumidification fresh air unit and the heat dissipation fin group are connected to the output end of the absorption heat pump, the output ends of the radiation plate and the dehumidification fresh air unit are connected to the input end of the variable frequency fan, and the output end of the variable frequency fan leads to the underground tunnel;

[0012] The intelligent control component includes a controller, which collects temperature data of the heat source collection component, humidity data of the wellhead antifreeze component and pressure data of the downhole temperature control component in real time through a wireless sensor network; the controller has a built-in digital twin model and a source-grid-load collaborative algorithm, and realizes the control of each component through an industrial bus.

[0013] In a further technical solution, in the heat source collection component:

[0014] The tube wall of the nanofluid heat pipe is coated with a silicon carbide-graphene composite heat conductive layer;

[0015] The phase change energy storage tank is filled with paraffin-expanded graphite composite phase change material.

[0016] In a further technical solution, in the wellhead antifreeze assembly:

[0017] The heat dissipation fin group comprises V-shaped fins which are staggered in the axial direction, and micropores with an aperture of 50-200 μm are opened on the surface of the fins;

[0018] The humidity sensing coating is composed of a temperature-sensitive color-changing material and conductive graphene. When the relative humidity is greater than a designed threshold, antifreeze measures are triggered and directional heating is started.

[0019] In a further technical solution, the directional heating is implemented by: generating a position coordinate signal through the change in resistance of the humidity-sensing coating; controlling the two-phase flow working fluid in the heat dissipation fin group to form eddy current impact in a specified area to increase the temperature of the specified area.

[0020] In a further technical solution, in the downhole temperature control component:

[0021] The radiation panel is a double-layer hollow aluminum plate structure, filled with a nano-silica aerogel thermal insulation layer inside and covered with a far-infrared emission coating on the surface;

[0022] The dehumidification fresh air unit uses LiCl solution as the dehumidifying agent and forms a closed concentration difference circulation loop with an absorption heat pump.

[0023] In a further technical solution, the intelligent control component includes wireless temperature and humidity sensors, heat flux meters, and pressure transmitters deployed in each partition of the underground; among them, the method for constructing the digital twin model is:

[0024] Train the LSTM neural network to predict the heat load based on historical data, and generate a three-dimensional dynamic heat field map in combination with CFD simulation;

[0025] The source-network-load coordination algorithm calculates the optimal working medium distribution strategy in real time and preferentially calls the phase change energy storage tanks in adjacent areas to cope with sudden low-temperature conditions.

[0026] In a further technical solution, the pulsating heat pipe group has the following two operating modes:

[0027] When the mine drainage temperature > 20°C, start the high-frequency mode of the pulsating heat pipe and close the inlet valve of the phase change energy storage tank;

[0028] When the return air temperature < 20°C, switch to the low-frequency mode of the pulsating heat pipe and open the inlet valve of the phase change energy storage tank.

[0029] In a further technical solution, it also includes an emergency heating subsystem: arrange a movable heat pipe quick-installation bracket at the tunneling face, and connect a micro-vortex heater to the end of the bracket; when it is monitored that the local temperature drops suddenly by more than the set threshold, automatically release the heat in the phase change energy storage tank and supplement the heating through the vortex heater.

[0030] To sum up, due to the adoption of the above technical solutions, the beneficial effects of the present invention are:

[0031] 1. Through the collaborative work of the heat source acquisition component, the wellhead anti-freezing component, the downhole temperature control component, and the intelligent control component, the present invention realizes the coordination of mine waste heat recovery and air conditioning, not only ensuring the safe production of the mine, but also saving energy, reducing the operation cost, and reducing environmental pollution.

[0032] 2. During the entire air conditioning process of the present invention, the intelligent control component collects various sensor data in real time, conducts virtual simulation and optimization of the system through the digital twin model, and simultaneously uses the source-network-load collaborative algorithm to intelligently schedule the energy distribution. This enables the system to more accurately predict and respond to various working conditions, with more reasonable and efficient energy distribution, achieving the intelligent management of the system.

[0033] 3. The present invention realizes the recovery of multi-level heat sources. It can not only supply heat to the heat dissipation fin group, preheat the incoming air, and ensure the normal operation of wellhead equipment in cold environments, thereby effectively protecting the wellhead from freezing, but also store heat in the phase change energy storage tank and release the stored heat when needed to meet the thermal energy requirements of the mine, effectively improving the utilization rate of thermal energy.

[0034] 4. The dehumidification fresh air unit of the present invention uses LiCl solution as the dehumidifying agent and forms a closed concentration difference circulation loop with the absorption heat pump. During operation, it effectively reduces the humidity of the fresh air by utilizing the hygroscopic effect of the LiCl solution, and then regenerates the dehumidifying agent using the waste heat of the absorption heat pump after absorption, thus forming a closed cycle, which is both efficient and environmentally friendly, ensuring the continuous and stable operation of the dehumidification fresh air unit.

[0035] 5. The position coordinate signal generated by the change in the resistance of the humidity sensing coating of the present invention can accurately indicate the area that needs to be heated, effectively avoiding the energy waste caused by blind heating. The formation of the eddy current impact can concentrate the heat, rapidly increase the local temperature, improve the heating efficiency, and shorten the heating time. This directional heating method avoids the energy loss caused by global heating and only heats the area that needs to be heated, effectively saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be described by way of examples and with reference to the accompanying drawings, wherein:

[0037] Figure 1 is a schematic diagram of the heat transfer path of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0039] Refer to Figure 1 , the present invention provides a heat pipe type air conditioning system for mines, including a heat source collection component, a wellhead anti-freezing component, an underground temperature control component, and an intelligent control component, wherein:

[0040] The heat source collection assembly includes a high-temperature electromechanical equipment heat dissipation cover, a medium-temperature mine water heat exchanger and a low-temperature return air channel heat exchange plate. The high-temperature electromechanical equipment heat dissipation cover is provided with a nanofluid heat pipe, and the nanofluid heat pipe is connected to a pulsating heat pipe group through a working fluid delivery pipeline. The medium-temperature mine water heat exchanger and the low-temperature return air channel heat exchange plate are connected to a phase change energy storage tank through a pulsating heat pipe group.

[0041] The wellhead antifreeze assembly includes a heat dissipation fin group and a humidity sensing coating, wherein the heat dissipation fin group is connected to the nanofluid heat pipe through a working fluid delivery pipeline, and the humidity sensing coating is attached to the surface of the heat dissipation fin group;

[0042] The underground temperature control component includes an absorption heat pump, a radiation plate, a dehumidification fresh air unit and a variable frequency fan. The nanofluid heat pipe and the phase change energy storage tank are connected to the input end of the absorption heat pump, the radiation plate, the dehumidification fresh air unit and the heat dissipation fin group are connected to the output end of the absorption heat pump, the output ends of the radiation plate and the dehumidification fresh air unit are connected to the input end of the variable frequency fan, and the output end of the variable frequency fan leads to the underground tunnel;

[0043] The intelligent control component includes a controller, which collects temperature data of the heat source collection component, humidity data of the wellhead antifreeze component and pressure data of the downhole temperature control component in real time through a wireless sensor network; the controller has a built-in digital twin model and a source-grid-load collaborative algorithm, and realizes the control of each component through an industrial bus.

[0044] In the actual underground coal mine exploitation process, the heat source collection component is responsible for collecting the waste heat in the mine, including the heat dissipated by high-temperature electromechanical equipment, the heat of medium-temperature mine water, and the heat of low-temperature return air, achieving the recovery of multi-level heat sources; the wellhead anti-freezing component uses the collected heat to protect the wellhead from freezing; the underground temperature control component adjusts the temperature and humidity of the underground air through equipment such as absorption heat pumps; and the intelligent control component is responsible for collecting the data of each sensor in real time and optimizing the operation of each component through a digital twin model and a source-network-load coordination algorithm. Specifically, a large amount of heat is generated during the operation of large equipment in the mine, and this heat is dissipated through the heat dissipation cover of high-temperature electromechanical equipment. The nanofluid heat pipe, relying on its heat conduction performance, efficiently absorbs the heat on the heat dissipation cover. Subsequently, through the working fluid delivery pipeline, this heat is transferred to the heat dissipation fin group, which preheats the incoming air and ensures the normal operation of wellhead equipment in cold environments, thus effectively protecting the wellhead from freezing. The medium-temperature mine water heat exchanger and the low-temperature return air channel heat exchange plate are respectively used to absorb the heat in the mine water and the heat in the return air. They are connected to the nanofluid heat pipe and the phase change energy storage tank through the pulsating heat pipe group, and can not only transfer the heat to the nanofluid heat pipe, but also transfer the heat to the phase change energy storage tank for storage, and can release the stored heat when needed to meet the heat energy requirements of the mine. The input end of the absorption heat pump is connected to the nanofluid heat pipe and the phase change energy storage tank, making full use of the heat recovered by the heat source collection component as the driving source, and realizing the heating or cooling of the underground air through the heat pump cycle. Its output end is connected with a radiation plate, a dehumidifying fresh air unit, and a heat dissipation fin group. The radiation plate is used to evenly dissipate or absorb heat, effectively adjusting the underground temperature; the dehumidifying fresh air unit controls the underground humidity and provides fresh air, and the heat dissipation fin group uses this heat to heat the wellhead to achieve anti-freezing protection. The variable-frequency fan, as a key component of the ventilation system, sends the fresh air after temperature and humidity adjustment into the underground roadway, improving the working environment of miners. The heat contained in this fresh air can also be recycled through heat exchange with the low-temperature return air channel heat exchange plate and the nanofluid heat pipe during the return air process, further improving the heat utilization rate. It is worth mentioning that during the entire air conditioning process, the intelligent control component collects the data of various sensors in real time, conducts virtual simulation and optimization of the system through a digital twin model, and at the same time uses the source-network-load coordination algorithm to intelligently schedule the energy distribution, controlling the adjustment of various components such as the working fluid regulating valve of the pulsating heat pipe group, the frequency converter of the absorption heat pump, and the air supply damper of the dehumidifying fresh air unit. This enables the system to more accurately predict and respond to various working conditions, with more reasonable and efficient energy distribution, realizing the intelligent management of the system.Compared with the traditional central centralized ventilation system, this air conditioning system realizes the coordination of mine waste heat recovery and air conditioning through the collaborative work of the heat source collection component, the wellhead anti-freezing component, the underground temperature control component and the intelligent control component, which not only ensures the safe production of the mine, but also saves energy and reduces the operation cost.

[0045] In a specific embodiment, in the heat source collection component:

[0046] The tube wall of the nanofluid heat pipe is coated with a silicon carbide-graphene composite heat conduction layer;

[0047] The phase change energy storage tank is filled with a paraffin-expanded graphite composite phase change material.

[0048] The tube wall of the nanofluid heat pipe is coated with a silicon carbide-graphene composite heat conduction layer, which improves the heat conduction coefficient of the heat pipe and effectively improves the heat transfer efficiency compared with the traditional copper tube; the phase change energy storage tank is filled with a paraffin-expanded graphite composite phase change material, which realizes the effective storage and release of heat.

[0049] In a specific embodiment, in the wellhead anti-freezing component:

[0050] The heat dissipation fin group includes V-shaped fins distributed axially and staggered, and micropores with a pore diameter of 50-200 μm are opened on the fin surface;

[0051] The humidity sensing coating is composed of a temperature-sensitive color-changing material and conductive graphene, and triggers anti-freezing measures and starts directional heating when the relative humidity is greater than the design threshold.

[0052] The heat dissipation fin group adopts axially staggered V-shaped fins, which effectively promotes the formation of turbulence, thereby strengthening the heat exchange effect. At the same time, the 50-200 μm micropores on the fin surface can enhance the capillary pumping effect, improve the heat transfer coefficient, shorten the heat response time, and effectively enhance the overall heat dissipation efficiency. In addition, the temperature-sensitive color-changing material is coupled with the graphene conductive layer, and the critical humidity of the temperature-sensitive color-changing material is 85%. When the relative humidity > 5%, the wet area is located through the resistance change. Once the wet area is detected, the anti-freezing measures will be triggered and the directional heating will be started, thus realizing the intelligent anti-freezing function.

[0053] In a specific embodiment, the implementation method of the directional heating is: generating a position coordinate signal through the resistance change of the humidity sensing coating; controlling the two-phase flow working medium in the heat dissipation fin group to form a vortex impact in the specified area to increase the local temperature.

[0054] The position coordinate signal generated by the change in the resistance of the humidity sensing coating can accurately indicate the area that needs to be heated, effectively avoiding the energy waste caused by blind heating. The formation of the eddy current impact can concentrate the heat, rapidly increase the local temperature, improve the heating efficiency, and shorten the heating time. This way of directional heating avoids the energy loss caused by global heating and only heats the area that needs to be heated, effectively saving energy.

[0055] In a specific embodiment, in the downhole temperature control assembly:

[0056] The radiation plate is a double-layer hollow aluminum plate structure, filled with a nano-silica aerogel thermal insulation layer inside and covered with a far-infrared emission coating on the surface;

[0057] The dehumidification fresh air unit uses LiCl solution as the dehumidifying agent and forms a closed concentration difference circulation loop with an absorption heat pump.

[0058] The radiation plate adopts a double-layer hollow aluminum plate structure and is filled with a nano-silica aerogel thermal insulation layer inside, which can reduce heat loss. At the same time, the surface is covered with a far-infrared emission coating, which can enhance the radiation efficiency, so that the radiation plate can release heat evenly. The dehumidification fresh air unit uses LiCl solution as the dehumidifying agent and forms a closed concentration difference circulation loop with an absorption heat pump. In this process, the hygroscopic effect of the LiCl solution is used to effectively reduce the humidity of the fresh air, and the waste heat of the absorption heat pump is used to regenerate the dehumidifying agent after absorption, thus forming a closed cycle, which is both efficient and environmentally friendly, ensuring the continuous and stable operation of the dehumidification fresh air unit.

[0059] In a specific embodiment, the intelligent control component includes wireless temperature and humidity sensors, heat flow meters, and pressure transmitters deployed in each partition of the downhole; among them, the method for constructing the digital twin model is:

[0060] Training an LSTM neural network to predict the heat load based on historical data and generating a three-dimensional dynamic heat field map by combining CFD simulation;

[0061] The source-network-load coordination algorithm calculates the optimal working medium distribution strategy in real time and preferentially calls the phase change energy storage tanks in adjacent areas to cope with sudden low-temperature conditions.

[0062] Through deeply mining and analyzing historical data and being fully trained, the LSTM neural network can highly accurately predict the changing trend of heat load, providing a solid and scientific basis for the thermal energy management of the system. Meanwhile, by combining CFD simulation to generate a three-dimensional dynamic heat field map, the thermal energy distribution state of the system can be visually seen, facilitating accurate regulation by the operation and maintenance personnel. In addition, with its powerful real-time computing ability, the source-network-load coordination algorithm can quickly formulate the optimal working medium distribution strategy to ensure that the system can maintain an efficient and stable operation state under various complex and changeable working conditions, effectively reducing energy consumption. It is worth mentioning that when dealing with sudden low-temperature working conditions, the algorithm can preferentially call the phase change energy storage tanks in adjacent areas to quickly adjust the system operation state, effectively improving the emergency response speed and overall stability of the system.

[0063] In a specific embodiment, the pulsating heat pipe group has the following two operating modes:

[0064] When the mine drainage temperature > 20°C, start the high-frequency mode of the pulsating heat pipe and close the inlet valve of the phase change energy storage tank;

[0065] When the return air temperature < 20°C, switch to the low-frequency mode of the pulsating heat pipe and open the inlet valve of the phase change energy storage tank.

[0066] When the mine drainage temperature exceeds the threshold of 20°C, the system automatically starts the high-frequency mode of the pulsating heat pipe to quickly and effectively dissipate heat, ensuring that the system will not be damaged due to overheating. At the same time, close the inlet valve of the phase change energy storage tank to effectively prevent heat from being transferred into the phase change energy storage tank for storage, so as to ensure that this part of the heat can be directly and quickly transferred from the pulsating heat pipe group to the nanofluid heat pipe and then supplied to the heat dissipation fin group for wellhead anti-freezing, reducing the loss in the energy transfer process. When the return air temperature is lower than the threshold of 20°C, the system automatically switches to the low-frequency mode of the pulsating heat pipe to reduce unnecessary energy consumption. At the same time, open the inlet valve of the phase change energy storage tank to store the excess heat for future use. Through the flexible switching of these two operating modes, the pulsating heat pipe group can adapt to different mine environmental conditions and ensure that the system can maintain an efficient and stable operation state under various working conditions.

[0067] In a specific embodiment, it further includes an emergency heating subsystem: arrange a movable heat pipe quick-installation bracket at the heading face, and connect a micro-vortex heater to the end of the bracket; when it is monitored that the local temperature drops suddenly by more than the set threshold, automatically release the heat in the phase change energy storage tank and supplement heating through the vortex heater.

[0068] Arrange a movable heat pipe quick-installation support at the tunneling face to cope with sudden changes in local temperature. When a sudden water inrush accident or other incidents cause the local temperature to drop suddenly to the set threshold of 5°C, the heat in the phase change energy storage tank can be quickly released through a micro-vortex heater, so that the working face temperature can quickly return to the safe range, ensuring the normal progress of tunneling operations and the safety of personnel.

[0069] The above are only embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A heat pipe type air conditioning system for mines, characterized in that, It includes heat source collection components, wellhead antifreeze components, downhole temperature control components and intelligent control components, among which: The heat source collection assembly includes a high-temperature electromechanical equipment heat dissipation cover, a medium-temperature mine water heat exchanger and a low-temperature return air channel heat exchange plate. The high-temperature electromechanical equipment heat dissipation cover is provided with a nanofluid heat pipe, and the nanofluid heat pipe is connected to a pulsating heat pipe group through a working fluid delivery pipeline. The medium-temperature mine water heat exchanger and the low-temperature return air channel heat exchange plate are connected to a phase change energy storage tank through a pulsating heat pipe group. The wellhead antifreeze assembly includes a heat dissipation fin group and a humidity sensing coating, wherein the heat dissipation fin group is connected to the nanofluid heat pipe through a working fluid delivery pipeline, and the humidity sensing coating is attached to the surface of the heat dissipation fin group; The underground temperature control component includes an absorption heat pump, a radiation plate, a dehumidification fresh air unit and a variable frequency fan. The nanofluid heat pipe and the phase change energy storage tank are connected to the input end of the absorption heat pump, the radiation plate, the dehumidification fresh air unit and the heat dissipation fin group are connected to the output end of the absorption heat pump, the output ends of the radiation plate and the dehumidification fresh air unit are connected to the input end of the variable frequency fan, and the output end of the variable frequency fan leads to the underground tunnel; The intelligent control component includes a controller, which collects temperature data of the heat source collection component, humidity data of the wellhead antifreeze component and pressure data of the downhole temperature control component in real time through a wireless sensor network; the controller has a built-in digital twin model and a source-grid-load collaborative algorithm, and realizes the control of each component through an industrial bus; Wherein, in the wellhead antifreeze component: The heat dissipation fin group comprises V-shaped fins which are staggered in the axial direction, and micropores with an aperture of 50-200 μm are opened on the surface of the fins; The humidity sensing coating is composed of a temperature-sensitive color-changing material and conductive graphene. When the relative humidity is greater than a designed threshold, antifreeze measures are triggered and directional heating is started.

2. The heat pipe type air conditioning system for mine according to claim 1, characterized in that, In the heat source collection component: The tube wall of the nanofluid heat pipe is coated with a silicon carbide-graphene composite heat conductive layer; The phase change energy storage tank is filled with paraffin-expanded graphite composite phase change material.

3. The heat pipe type air conditioning system for mine according to claim 1, characterized in that, The directional heating is achieved by: generating a position coordinate signal by sensing the change in the resistance of the coating through humidity; and controlling the two-phase flow medium in the heat dissipation fin group to form an eddy current impact in a designated area to increase the temperature of the designated area.

4. The heat pipe type air conditioning system for mine according to claim 1, characterized in that, In the downhole temperature control component: The radiation plate is a double-layer hollow aluminum plate structure, the interior is filled with a nano-silicon dioxide aerogel insulation layer, and the surface is covered with a far-infrared emitting coating; The dehumidification fresh air unit adopts LiCl solution as a dehumidifier and forms a closed concentration difference circulation loop with the absorption heat pump.

5. The heat pipe type air conditioning system for mine according to claim 1, characterized in that, The intelligent control component includes wireless temperature and humidity sensors, heat flow meters and pressure transmitters deployed in various zones underground; wherein the digital twin model construction method is: Based on historical data, LSTM neural network is trained to predict heat load, and three-dimensional thermal field dynamic map is generated by combining CFD simulation; The source-grid-load collaborative algorithm calculates the optimal working fluid allocation strategy in real time, and preferentially calls the phase change energy storage tanks in adjacent areas to cope with sudden low temperature conditions.

6. The heat pipe type air conditioning system for mine according to claim 1, characterized in that, The pulsating heat pipe group has the following two operating modes: When the mine drainage temperature is greater than 20°C, the pulsating heat pipe high frequency mode is started and the inlet valve of the phase change energy storage tank is closed; When the return air temperature < 20°C, switch to the low-frequency mode of the pulsating heat pipe and open the inlet valve of the phase change energy storage tank.

7. The heat pipe type air conditioning system for mine according to claim 1, characterized in that, It also includes an emergency heating subsystem: a movable heat pipe quick-installation bracket is arranged at the tunneling face, and a micro-vortex heater is connected to the end of the bracket; when it is monitored that the local temperature drops suddenly by more than the set threshold, the heat in the phase change energy storage tank is automatically released and supplementary heating is provided through the vortex heater.

Images