Heat storage device with surface-textured ceramic heat exchange tubes

Abstract

The invention provides a surface texturing ceramic heat exchange tube heat storage device, and relates to the technical field of heat energy storage and heat exchange, the surface texturing ceramic heat exchange tube heat storage device comprises a heat absorption tube, the heat absorption tube is located in a device box, the main body of the heat absorption tube is of an S-shaped structure, and an inlet tube and an outlet tube of the heat absorption tube are fixedly connected with a left side plate and a right side plate of the device box respectively; and the radiating pipes are symmetrically arranged in two groups, and the main bodies of the radiating pipes are of S-shaped structures. The detection rod is installed at the lower end of the controller, the water outlet temperature can be monitored in real time, if the temperature is lower than a set value, the controller transmits a signal to the power source assembly, the heating wire can work, sodium sulfate decahydrate is heated in an auxiliary mode, it is ensured that the sodium sulfate decahydrate releases enough heat, and finally the temperature of water discharged from the left side of the heat absorption pipe meets the requirement; the problems that due to the fact that the contact area of a heat exchange pipe and a waste heat medium of a traditional heat storage device is limited, heat transfer is insufficient, a real-time monitoring and auxiliary heating mechanism is lacked, the stability of output heat is difficult to guarantee, and the requirement of a precise heat using scene cannot be met are solved.

Description

Technical Field

[0001] This invention relates to the field of thermal energy storage and heat exchange technology, and in particular to a surface-textured ceramic heat exchange tube heat storage device. Background Technology

[0002] With the increasing prominence of the energy crisis and environmental protection demands, waste heat recovery and energy storage technologies have become key means to improve energy utilization efficiency. Phase change thermal energy storage technology has received widespread attention in fields such as industrial waste heat recovery, building heating, and solar energy utilization due to its advantages such as high energy density and good temperature stability. Among them, sodium sulfate decahydrate, as a typical inorganic phase change thermal energy storage material, has become one of the preferred materials for medium and low temperature thermal energy storage scenarios due to its suitable phase change temperature, high latent heat of phase change, low cost, and wide availability.

[0003] Referring to patent CN202010604112.3, a multi-stage heat storage device is disclosed, including a heat storage tank and heat exchange tubes. The heat storage tank is filled from bottom to top with at least a first heat storage medium, a second heat storage medium, and a third heat storage medium, with the specific heat capacity of the third, second, and first heat storage media increasing sequentially. The heat exchange tubes are serpentine in the vertical direction, passing sequentially through the third, second, and first heat storage media along the vertical direction of the heat storage tank. This invention fills the heat storage tank with at least three heat storage media with different specific heat capacities. The gradient of specific heat capacities from top to bottom maximizes the utilization of this temperature difference to minimize heat loss and improve heat storage capacity. Simultaneously, the heat transfer medium within the heat exchange tubes gradually heats up, extending the service life of the heat exchange tubes.

[0004] Based on the above patent search, it was found that the following technical bottlenecks still exist in the practical application of thermal storage devices based on sodium sulfate decahydrate: First, traditional heat exchange tubes in thermal storage devices often have a smooth surface structure, resulting in limited contact area with the waste heat medium. This leads to insufficient heat transfer and low waste heat recovery efficiency. At the same time, the thermal resistance between sodium sulfate decahydrate and the heat exchange tube is relatively large, making it difficult for heat to be quickly conducted to the interior of the thermal storage material, thus affecting the energy storage rate.

[0005] Secondly, during the heat release process, the heat release temperature of sodium sulfate decahydrate is easily affected by fluctuations in ambient temperature and heat demand. Traditional devices lack real-time monitoring and auxiliary heating mechanisms, making it difficult to ensure the stability of the output heat and meet the needs of precise heat use scenarios. Summary of the Invention

[0006] This invention relates to a surface-textured ceramic heat exchange tube thermal storage device, which solves the problems of limited contact area between the heat exchange tube and the waste heat medium in traditional thermal storage devices, resulting in insufficient heat transfer, lack of real-time monitoring and auxiliary heating mechanisms, difficulty in ensuring the stability of output heat, and inability to meet the needs of precise heat use scenarios.

[0007] This invention provides a surface-textured ceramic heat exchange tube thermal storage device, specifically comprising: a device box; A feed pipe is welded to the right side of the upper end face of the device box. A cover plate is rotatably connected to the upper end face of the feed pipe. An outlet is opened on the lower end face of the right side plate of the device box. A baffle is provided at the outlet. The baffle is connected to the device box by bolts. The heat absorption tube is located inside the device box. The main body of the heat absorption tube has an S-shaped structure. The inlet and outlet of the heat absorption tube are fixedly connected to the left and right side plates of the device box, respectively. The heat dissipation pipes are arranged symmetrically in two sets. The main body of the heat dissipation pipe is an S-shaped structure. A T-shaped connecting pipe is installed at each of the left and right ends of the heat dissipation pipe. The connecting pipes are fixedly connected to the left and right side plates of the device box. An auxiliary heat-conducting block, the main body of which is a long strip structure, is installed in a ring on the outer end face of the vertical tube of the heat dissipation pipe; A power supply assembly is fixedly installed on the upper surface of the device box. A heating wire is installed on the lower surface of the power supply assembly, which is located inside the upper part of the device box. A socket is fixedly installed on the upper surface of the power supply assembly.

[0008] Furthermore, two sleeves are fixedly installed on the outer end face of the vertical tube of the heat absorption tube, and two heat-conducting plates are symmetrically installed on the outer end face of the sleeves. The other end of the heat-conducting plates is fixedly connected to the front and rear side plates of the device box.

[0009] Furthermore, a controller is fixedly installed at the outlet end of the heat absorption tube, a probe rod is fixedly installed on the lower end face of the controller, a temperature sensor is provided on the lower end face of the probe rod, and the controller is electrically connected to the power supply assembly.

[0010] Furthermore, the inner end face of the heat dissipation pipe is provided with six grooves in an annular shape, the surface of the auxiliary heat conduction block is provided with evenly distributed round holes, and the outer end face of the auxiliary heat conduction block is provided with an arc-shaped guide plate.

[0011] Furthermore, a protective frame is welded to the inner end face of the top plate of the device box, and heat dissipation holes are evenly opened on the bottom plate surface of the protective frame, with the heating wire located inside the protective frame.

[0012] Furthermore, a connecting plate is fixedly installed on the lower end face of the front and rear side plates of the device box. Two connecting holes are opened on the surface of the connecting plate, and the main body of the connecting hole is a stepped structure.

[0013] Furthermore, the device box is filled with energy storage material, and the bottom surface of the device box has an inclined structure.

[0014] Furthermore, cavities are provided at the inner ends of the front and rear side plates of the device box, and the cavities are filled with thermal insulation material.

[0015] This invention provides a surface-textured ceramic heat exchange tube thermal storage device, which has the following beneficial effects: 1. The six grooves on the inner end face of the heat pipe increase the contact area with the medium and improve the heat exchange efficiency. At the same time, six auxiliary heat-conducting blocks are welded to the outer end of the heat pipe. The six auxiliary heat-conducting blocks are arranged in a ring structure. The round holes and arc-shaped guide plates on the surface of the auxiliary heat-conducting blocks further expand the heat dissipation area and quickly conduct the residual heat in the medium to the inside of the device box.

[0016] 2. The device box is filled with energy storage material, such as sodium sulfate decahydrate. After absorbing heat, sodium sulfate decahydrate will change its state. When the temperature reaches its phase change point, it melts from solid to liquid and stores the heat through the latent heat of phase change. During this process, auxiliary heat-conducting blocks and guide plates ensure uniform heat diffusion. The cavities of the front and rear side plates of the device box are filled with heat-insulating material to reduce heat loss to the outside.

[0017] 3. Two sleeves are fixedly installed on the outer end of the vertical tube of the heat absorption tube. The end of the heat-conducting plate on the outer end face of the sleeve is fixedly connected to the front and rear side plates of the device box, so as to conduct the heat stored in the sodium sulfate decahydrate in the device box to the cold water in the heat absorption tube. The sleeves and heat-conducting plates are made of copper, which can improve the efficiency of heat transfer and make the cold water gradually heat up.

[0018] 4. A controller is installed on the outer end face of the heat absorption tube outlet. A probe is installed at the lower end of the controller. The probe is located inside the heat absorption tube, and a temperature sensor is installed at the end of the probe to monitor the outlet water temperature in real time. If the temperature is lower than the set value, the controller will transmit a signal to the power supply component to activate the heating wire. The heating wire is located inside the protective frame and releases heat evenly through the heat dissipation holes to assist in heating the sodium sulfate decahydrate, ensuring that it releases enough heat to ultimately make the water discharged from the left side of the heat absorption tube reach the required temperature.

[0019] 5. New sodium sulfate decahydrate can be added through the feed pipe at the top of the device box. The discharged material can be discharged by opening the discharge port baffle. The inclined structure at the bottom of the device box facilitates the complete discharge of the material. Two connecting plates are installed on the lower end of the front and rear side plates of the device box. Two connecting holes are opened on the surface of the connecting plates. Workers can fix the connecting plates by passing the fixing nails through the connecting holes to ensure the stability of the device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0021] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0022] In the attached diagram: Figure 1 A schematic diagram of the overall device structure of the present invention is shown; Figure 2 A schematic diagram of the internal structure of the device box of the present invention is shown; Figure 3 A schematic diagram of the connection structure between the device box and the heat dissipation pipe of the present invention is shown; Figure 4 A schematic diagram of the connection structure between the auxiliary heat-conducting block and the heat dissipation pipe of the present invention is shown; Figure 5 A schematic diagram of the device box and cavity structure of the present invention is shown; Figure 6 A schematic diagram of the connection structure between the auxiliary heat-conducting block and the guide plate of the present invention is shown; Figure 7 A schematic cross-sectional view of the heat dissipation pipe structure of the present invention is shown; Figure 8 A schematic diagram of the connection structure between the power supply assembly and the heating wire of the present invention is shown; Figure 9 A schematic diagram of the connection structure of the heat-absorbing tube, sleeve and heat-conducting plate of the present invention is shown.

[0023] List of reference numerals: 1. Device box; 101. Connecting plate; 1011. Connecting hole; 102. Feed pipe; 1021. Cover plate; 103. Baffle; 104. Protective frame; 1041. Heat dissipation hole; 105. Cavity; 2. Heat absorption pipe; 3. Controller; 301. Detector rod; 4. Sleeve; 401. Heat conduction plate; 5. Heat dissipation pipe; 501. Connecting pipe; 502. Groove; 6. Auxiliary heat conduction block; 601. Round hole; 602. Guide plate; 7. Power supply assembly; 701. Heating wire. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1: Please refer to Figures 1 to 9 : This invention proposes a surface-textured ceramic heat exchange tube heat storage device, comprising: device box 1; A feed pipe 102 is welded to the right side of the upper end face of the device box 1. A cover plate 1021 is rotatably connected to the upper end face of the feed pipe 102. After the cover plate 1021 is opened, new energy storage material can be put into the device box 1. A discharge port is opened on the lower end face of the right side plate of the device box 1. A baffle 103 is provided at the discharge port. The baffle 103 is connected to the device box 1 by bolts. Heat absorption tube 2 is located inside device box 1. The main body of heat absorption tube 2 has an S-shaped structure. The inlet and outlet pipes of heat absorption tube 2 are fixedly connected to the left and right side plates of device box 1, respectively. Cold water enters from the right side of heat absorption tube 2. After heat absorption tube 2 absorbs heat from inside device box 1, it will be discharged from the left side of heat absorption tube 2. The heat dissipation pipe 5 is symmetrically arranged in two sets. The main body of the heat dissipation pipe 5 is an S-shaped structure. A T-shaped connecting pipe 501 is installed at each of the left and right ends of the heat dissipation pipe 5. The connecting pipe 501 is fixedly connected to the left and right side plates of the device box 1. The connecting pipe 501 at the right end of the heat dissipation pipe 5 is the medium inlet pipe, and the connecting pipe 501 at the left end of the heat dissipation pipe 5 is the medium outlet pipe. During the energy storage process, the waste gas or wastewater containing residual heat enters the interior of the heat dissipation pipe 5 from the connecting pipe 501 on the right side. Then, the excess heat dissipates outward from the heat dissipation pipe 5 and is absorbed by sodium sulfate decahydrate. After releasing the heat, the medium is discharged from the connecting pipe 501 on the left side. The auxiliary heat-conducting block 6 has a long strip-shaped structure and is installed in a ring on the outer end face of the vertical tube of the heat dissipation pipe 5. The power supply assembly 7 is fixedly installed on the upper end face of the device box 1. A heating wire 701 is installed on the lower end face of the power supply assembly 7. The heating wire 701 is located inside the upper part of the device box 1. A socket is fixedly installed on the upper end face of the power supply assembly 7.

[0026] Two sleeves 4 are fixedly installed on the outer end face of the vertical tube of the heat absorption tube 2. Two heat conduction plates 401 are symmetrically installed on the outer end face of the sleeves 4. The other end of the heat conduction plate 401 is fixedly connected to the front and rear side plates of the device box 1. A controller 3 is fixedly installed at the outlet end of the heat absorption tube 2. A probe rod 301 is fixedly installed on the lower end face of the controller 3. A temperature sensor is provided on the lower end face of the probe rod 301. The controller 3 is electrically connected to the power supply assembly 7.

[0027] The technical effect achieved by adopting the above solution is as follows: a temperature sensor is installed at the end of the probe 301, which can monitor the outlet water temperature in real time. If the temperature is lower than the set value, the controller 3 will transmit a signal to the power supply component 7, which can make the heating wire 701 work. The heating wire 701 is located inside the protective frame 104 and releases heat evenly through the heat dissipation hole 1041 to assist in heating sodium sulfate decahydrate, ensuring that it releases enough heat, and finally makes the water temperature discharged from the left side of the heat absorption pipe 2 reach the required temperature.

[0028] The heat sink 5 has six grooves 502 arranged in a ring on its inner end face, and the auxiliary heat conduction block 6 has evenly spaced circular holes 601 on its surface. The auxiliary heat conduction block 6 has an arc-shaped guide plate 602 installed on its outer end face. In use, the six grooves 502 on the inner end face of the heat sink 5 increase the contact area with the medium and improve the heat exchange efficiency. At the same time, six auxiliary heat conduction blocks 6 are welded to the outer end of the heat sink 5. The six auxiliary heat conduction blocks 6 are arranged in a ring structure. The circular holes 601 and the arc-shaped guide plate 602 on the surface of the auxiliary heat conduction blocks 6 further expand the heat dissipation area and quickly conduct the residual heat in the medium to the inside of the device box 1.

[0029] The device box 1 has a protective frame 104 welded to the inner end face of the top plate. The bottom plate of the protective frame 104 has heat dissipation holes 1041 evenly distributed. The heating wire 701 is located inside the protective frame 104. The lower end face of the front and rear side plates of the device box 1 is fixedly installed with a connecting plate 101. The surface of the connecting plate 101 has two connecting holes 1011. The main body of the connecting hole 1011 is a stepped structure. During use, the worker can pass the fixing nail through the connecting hole 1011 to fix the connecting plate 101 to ensure the stable fixation of the device.

[0030] Example 2, based on Example 1, such as Figures 1-9 As shown, the device box 1 is filled with energy storage material, which can be sodium sulfate decahydrate. The bottom surface of the device box 1 has an inclined structure. The inner ends of the front and rear side plates of the device box 1 are provided with cavities 105, and the cavities 105 are filled with heat insulation material.

[0031] The technical effects achieved by adopting the above scheme are as follows: when the two heat dissipation pipes 5 pass through the device box 1, the heat of the medium inside the heat dissipation pipes 5 can be dissipated to the outside. After the sodium sulfate decahydrate absorbs heat, its state will change. When the temperature reaches its phase change point, it melts from solid to liquid. The heat is stored through the latent heat of phase change, thus realizing energy storage. When the cold water in the heat absorption pipe 2 passes through the fixed box 1, the sodium sulfate decahydrate can change from liquid to solid. At this time, the cold water absorbs heat and the temperature rises, thus realizing the reuse of heat. The cavity 105 is filled with heat insulation material, which can isolate heat radiation and prevent heat from escaping to the outside.

[0032] The working principle of this embodiment: In this invention, the medium containing residual heat enters the S-shaped heat dissipation pipe 5 through the T-shaped connecting pipe 501 at the right end of the heat dissipation pipe 5. The six grooves 502 on the inner end face of the heat dissipation pipe 5 increase the contact area with the medium, improving the heat exchange efficiency. Simultaneously, six auxiliary heat-conducting blocks 6 are welded to the outer end of the heat dissipation pipe 5. These six auxiliary heat-conducting blocks 6 are arranged in a ring structure. The circular holes 601 and arc-shaped guide plates 602 on the surface of the auxiliary heat-conducting blocks 6 further expand the heat dissipation area, rapidly transferring the residual heat in the medium to the inside of the device box 1. After absorbing heat, sodium sulfate decahydrate undergoes a phase change. When the temperature reaches its phase transition point, it... The solid melts into a liquid state, storing heat through the latent heat of phase change. During this process, the auxiliary heat-conducting block 6 and the guide plate 602 ensure uniform heat diffusion. The cavity 105 of the front and rear side plates of the device box 1 is filled with insulation material to reduce heat loss to the outside. The low-temperature medium after releasing heat is discharged from the connecting pipe 501 at the left end of the heat dissipation pipe 5, completing the waste heat recovery. When the heat is reused, cold water enters the middle S-shaped pipe from the right side of the heat absorption pipe 2. Two sleeves 4 are fixedly installed on the outer end of the vertical pipe of the heat absorption pipe 2. The ends of the heat-conducting plates 401 on the outer end face of the sleeves 4 are fixedly connected to the front and rear side plates of the device box 1. Next, the heat stored in the sodium sulfate decahydrate in the device box is conducted to the cold water in the heat absorber tube 2. The sleeve 4 and the heat conduction plate 401 are made of copper, which can improve the efficiency of heat transfer and gradually raise the temperature of the cold water. A controller 3 is installed on the outer end face of the outlet end of the heat absorber tube 2. A probe 301 is installed at the lower end of the controller 3. The probe 301 is located inside the heat absorber tube 2, and a temperature sensor is installed at the end of the probe 301 to monitor the outlet water temperature in real time. If the temperature is lower than the set value, the controller 3 transmits a signal to the power supply component 7, which can activate the heating wire 701. The heating wire 701 is located in the protective frame 1. Inside 04, heat is evenly released through the heat dissipation hole 1041 to assist in heating sodium sulfate decahydrate, ensuring that it releases enough heat to eventually bring the water temperature discharged from the left side of the heat absorption pipe 2 to the required level. New sodium sulfate decahydrate is added through the feed pipe 102, and the discharge port baffle 103 is opened to discharge the failed material. The inclined structure at the bottom of the device box 1 facilitates the complete discharge of the material. Two connecting plates 101 are installed on the lower end of the front and rear side plates of the device box 1. Two connecting holes 1011 are opened on the surface of the connecting plates 101. Workers can pass fixing nails through the connecting holes 1011 to fix the connecting plates 101, ensuring that the device is stably fixed.

Claims

1. A surface-textured ceramic heat exchanger tube thermal storage device, comprising: The device box has a feed pipe welded to the right side of its upper end face, a cover plate rotatably connected to the upper end face of the feed pipe, and a discharge port with a baffle plate on the lower end face of the right side plate of the device box. The baffle plate is connected to the device box by bolts. The device box is characterized by: a heat absorption pipe located inside the device box, the heat absorption pipe having an S-shaped body, and the inlet and outlet pipes of the heat absorption pipe being fixedly connected to the left and right side plates of the device box, respectively; two sets of heat dissipation pipes symmetrically arranged, the heat dissipation pipes having an S-shaped body, and a T-shaped connecting pipe installed at each end of the heat dissipation pipe, the connecting pipes being fixedly connected to the left and right side plates of the device box; an auxiliary heat-conducting block having a long strip-shaped body, the auxiliary heat-conducting block being installed in a ring on the outer end face of the vertical tube of the heat dissipation pipe; and a power supply assembly fixedly installed on the upper end face of the device box, with a heating wire installed on the lower end face of the power supply assembly, the heating wire being located inside the upper part of the device box, and a socket fixedly installed on the upper end face of the power supply assembly.

2. The surface-textured ceramic heat exchanger tube thermal storage device according to claim 1, characterized in that, Two sleeves are fixedly installed on the outer end face of the vertical tube of the heat absorption tube. Two heat-conducting plates are symmetrically installed on the outer end face of the sleeves. The other end of the heat-conducting plates is fixedly connected to the front and rear side plates of the device box.

3. The surface-textured ceramic heat exchanger tube thermal storage device according to claim 1, characterized in that, A controller is fixedly installed at the outlet end of the heat absorption tube, a probe rod is fixedly installed on the lower end face of the controller, a temperature sensor is provided on the lower end face of the probe rod, and the controller is electrically connected to the power supply assembly.

4. A surface-textured ceramic heat exchanger tube thermal storage device according to claim 1, characterized in that, The inner end face of the heat dissipation pipe is provided with six grooves in a ring shape, the surface of the auxiliary heat conduction block is provided with evenly distributed round holes, and the outer end face of the auxiliary heat conduction block is provided with an arc-shaped guide plate.

5. A surface-textured ceramic heat exchanger tube thermal storage device according to claim 1, characterized in that, A protective frame is welded to the inner end face of the top plate of the device box, and heat dissipation holes are evenly opened on the bottom plate surface of the protective frame. The heating wire is located inside the protective frame.

6. A surface-textured ceramic heat exchanger tube thermal storage device according to claim 1, characterized in that, A connecting plate is fixedly installed on the lower end face of the front and rear side plates of the device box. Two connecting holes are opened on the surface of the connecting plate, and the main body of the connecting hole is a stepped structure.

7. A surface-textured ceramic heat exchanger tube thermal storage device according to claim 1, characterized in that, The device box is filled with energy storage material, and the bottom surface of the device box has an inclined structure.

8. A surface-textured ceramic heat exchanger tube thermal storage device according to claim 1, characterized in that, The device box has cavities at the inner ends of the front and rear side plates, and the cavities are filled with thermal insulation material.

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