Plate-type phase change thermal storage heat exchanger device

Abstract

The utility model discloses a kind of plate type phase change energy storage heat exchanger devices, including fixed compression plate, movable clamping fixed plate, cold fluid inlet pipeline, cold fluid outlet pipeline, hot fluid inlet pipeline, hot fluid outlet pipeline, sheet and connecting piece;The fixed compression plate and movable clamping fixed plate are spaced apart;The device further includes central processing unit, pressure sensor, flow regulating valve and power module;The surface of the sheet is provided with small pit, and the edge of sheet is sawtooth shape;The central processing unit and power module are set on the board face of fixed compression plate;Pressure sensor is provided with two, respectively set in the pipe orifice of cold fluid inlet pipeline and hot fluid inlet pipeline;The flow regulating valve is provided with two, respectively set on the pipeline of cold fluid inlet pipeline and hot fluid inlet pipeline;Two pressure sensors and two flow regulating valves are electrically connected with central processing unit.The utility model solves the problem of low heat exchange efficiency of traditional plate type phase change energy storage heat exchanger device.

Description

Technical Field

[0001] This utility model relates to the field of energy conversion and storage devices, specifically a plate phase change energy storage heat exchanger device. Background Technology

[0002] Plate phase change energy storage heat exchangers mainly consist of plates, phase change energy storage materials, sealing gaskets, clamping plates, frames, inlet and outlet pipes, and valves. They primarily utilize the heat released or absorbed during the phase change process of a substance for energy storage and heat exchange. Combining the high energy density of phase change energy storage materials with the high heat exchange efficiency of plate heat exchangers, they achieve efficient energy storage and transfer. Since their practical application in the late 20th and early 21st centuries, plate phase change energy storage heat exchangers have been widely used in industries such as industrial waste heat recovery, power peak shaving, building energy conservation, renewable energy power generation, and thermal management of electronic equipment. However, with the increasing prominence of energy issues and the growing demand for efficient thermal management in industries and buildings, traditional plate phase change energy storage heat exchangers are no longer sufficient to meet the requirements of energy storage and efficient utilization. Compared to high-efficiency plate phase change energy storage heat exchangers, traditional plate phase change energy storage heat exchangers offer advantages such as compact structure, small footprint, flexible adjustment, easy maintenance, low heat loss, good corrosion resistance, and strong adaptability. However, it also has its own drawbacks. Traditional plate phase change energy storage heat exchangers have two main fluid inlet pipes, a hot fluid inlet pipe and a cold fluid inlet pipe, fixedly mounted on the front end plate. Due to unstable flow and pressure, the fluid distribution is uneven and the flow rate is abnormal, resulting in local overheating or undercooling, which hinders heat conduction and reduces heat exchange efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a plate phase change energy storage heat exchanger device, which solves the problem of low heat exchange efficiency of traditional plate phase change energy storage heat exchanger devices.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A plate-type phase change energy storage heat exchanger device includes a fixed clamping plate, a movable clamping plate, a cold fluid inlet pipe, a cold fluid outlet pipe, a hot fluid inlet pipe, a hot fluid outlet pipe, plates, and connectors. The fixed clamping plate and the movable clamping plate are spaced apart. Multiple plates are arranged between the fixed clamping plate and the movable clamping plate, with one side of each plate facing the fixed clamping plate and the other side having a phase change material. Connectors are positioned between the fixed clamping plate and the movable clamping plate to connect them and fix the multiple plates between them. The cold fluid inlet pipe, cold fluid outlet pipe, and hot fluid inlet pipe are also included. The hot fluid outlet pipes are all located on the outer end of the fixed clamping plate and are connected to the plate. The distinguishing feature is that the device also includes a central processing unit, pressure sensors, flow regulating valves, and a power module. The surface of the plate has small pits, and the edges of the plate are serrated. The central processing unit and power module are located on the fixed clamping plate. Two pressure sensors are provided, one at the inlet of the cold fluid inlet pipe and the other at the inlet of the hot fluid inlet pipe. Two flow regulating valves are provided, one on the inlet of the cold fluid inlet pipe and the other on the inlet of the hot fluid inlet pipe. Both pressure sensors and the two flow regulating valves are electrically connected to the central processing unit, and the power module provides the operating voltage.

[0006] The beneficial effects of this utility model are:

[0007] The plate-type phase change energy storage heat exchanger device provided by this utility model features flow regulating valves installed on both the cold fluid inlet pipe and the hot fluid inlet pipe, and a pressure sensor installed at the inlet of the fluid inlet pipe to monitor pressure changes in real time. The pressure sensor feeds back the pressure signal to the central processing unit. When pressure fluctuations occur, the central processing unit adjusts the opening of the flow control valves, thereby ensuring that the fluid flows into the heat exchanger channel through the pipes at a stable flow rate and pressure. Furthermore, the plate surface is designed with micro-dimples and serrated edges. This structural design allows the fluid to flow more evenly across the heat exchanger surface after entering the channel, and extends the fluid path within a limited space for sufficient contact, thus improving the heat exchanger's heat exchange efficiency. Attached Figure Description

[0008] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0009] Figure 2 This is a left view of an embodiment of the present utility model.

[0010] Figure 3 This is an exploded view of an embodiment of this utility model.

[0011] Figure 4 This is a plan view of the plate in an embodiment of the present utility model.

[0012] Figure 5 This is a schematic diagram of an embodiment of the present utility model.

[0013] Figure 6 This is a circuit diagram of an embodiment of the present invention.

[0014] The following are the labels in the diagram: 1. Fixed clamping plate; 2. Movable clamping plate; 3. Cold fluid inlet pipe; 4. Cold fluid outlet pipe; 5. Hot fluid inlet pipe; 6. Hot fluid outlet pipe; 7. Plate; 71. Recess; 8. Central processing unit; 9. Pressure sensor; 10. Flow regulating valve; 20. Power module; 30. Temperature sensor; 40. First through hole; 50. Second through hole; 60. Third through hole; 70. First sealing groove; 80. Second sealing groove; 90. Housing; 11. Screw; 12. Fixing nut; 13. Upper guide rod; 14. Lower guide rod; 15. Guide rod nut; 16. Column. Detailed Implementation

[0015] The present invention will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present invention may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of the present invention more complete and to fully convey the concept of the present invention to those skilled in the art.

[0016] like Figures 1 to 6 As shown, the plate phase change energy storage heat exchanger device of this embodiment includes a fixed clamping plate 1, a movable clamping plate 2, a cold fluid inlet pipe 3, a cold fluid outlet pipe 4, a hot fluid inlet pipe 5, a hot fluid outlet pipe 6, a plate 7, a connector, a central processing unit 8, a pressure sensor 9, a flow regulating valve 10, and a power module 20.

[0017] The fixed clamping plate 1 and the movable clamping plate 2 are arranged in parallel and at intervals.

[0018] Multiple plates 7 are provided, arranged between the fixed clamping plate 1 and the movable clamping plate 2. One side of the plate 7 faces the fixed clamping plate 1, and the other side is provided with phase change material. In this embodiment, the surface of the plate 7 is provided with small pits 71, and the edge of the plate 7 is serrated. This structural design allows the fluid to flow more evenly across the surface of the heat exchanger after entering the channel, and to extend the fluid flow path and ensure sufficient contact within a limited space, thereby improving the heat exchange efficiency of the heat exchanger. In terms of materials, the plates also use a new type of high thermal conductivity PA / EG / CPEG composite material, which improves thermal conductivity by 16.5 times. The plate surface is coated with a multifunctional epoxy composite coating (F-CB / CEP), which has high thermal conductivity (4.29 Wm-1K-1), corrosion resistance (low frequency resistance of 5.1 x 10¹¹ acm² at 181 days), hydrophobicity (contact angle: ~148.35°, moisture contact angle: ~20°), heat resistance and adhesion, thus improving thermal conductivity and extending its service life.

[0019] Heat from the fluid is transferred from the plates to the phase change material (PCM). The type of PCM, its phase change temperature, latent heat, and packing distribution affect the heat exchanger's conductivity and efficiency; suitable materials can improve performance. Therefore, this device uses a novel nano-additive and a biomimetic hierarchical porous aluminum nitride-polyethylene glycol (PEG / AlN) composite material in the PCM, placed within a microchannel heat exchange plate with multiple stacked heat storage units. This increases the thermal conductivity to 20.41 W / m·K, and the melting point and phase change enthalpy to 55.93 °C and 81.05 J / g, respectively. Thermal response is significantly improved, and the heat storage rate is increased by 36.10%. As heat is absorbed, the temperature of the PCM gradually rises. When it reaches its phase change temperature, the PCM begins to undergo a phase change, continuously absorbing heat for energy storage during this process. Due to the latent heat of phase change, the temperature of the PCM remains essentially constant before the phase change is complete, effectively storing a large amount of heat.

[0020] A connector is disposed between the fixed clamping plate 1 and the movable clamping plate 2, used to connect the fixed clamping plate 1 and the movable clamping plate 2, and to fix multiple plates 7 between the fixed clamping plate 1 and the movable clamping plate 2. In this embodiment, the connector includes multiple screws 11, multiple fixing nuts 12, an upper guide rod 13, a lower guide rod 14, a guide rod nut 15, and a column 16. In this embodiment, the fixed clamping plate 1 and the movable clamping plate 2 have first through holes 40 on both sides of their surfaces, through which the screws 11 pass. The two ends of the screws 11 pass through the first through holes 40 of the fixed clamping plate 1 and the movable clamping plate 2, respectively, and are then connected to the fixing nuts 12. Multiple plates 7 are arranged between the screws 11 on both sides of the fixed clamping plate 1 and the movable clamping plate 2. The fixed clamping plate 1 and the movable clamping plate 2 are connected on the same side by five screws 11. The screws 11 and the fixing nuts 12 cooperate with each other to clamp the multiple plates 7 between the fixed clamping plate 1 and the movable clamping plate 2.

[0021] The column 16 is positioned beside the movable clamping plate 2, which is located between the column 16 and the fixed clamping plate 1. The upper surface of the fixed clamping plate 1 and the upper end surface of the column 16 are both provided with a second through hole 50 through the upper guide rod 13. The lower surface of the fixed clamping plate 1 and the lower end surface of the column 16 are both provided with a third through hole 60 through the lower guide rod 14. The upper end of the plate 7 and the upper end of the movable clamping plate 2 are provided with a first sealing groove 70 through the upper guide rod 13, and the lower end of the plate 7 and the lower end of the movable clamping plate 2 are provided with a second sealing groove 80 through the lower guide rod 14. One end of the upper guide rod 13 passes through the second through hole 50 at the top of the fixed pressure plate 1, through the first sealing groove 70 at the top of the multiple plates 7 and the second sealing groove 80 at the top of the movable clamping plate 2, and exits through the second through hole 50 at the top of the column 16. Both ends of the upper guide rod 13 are fixed to the fixed pressure plate 1 and the column 16 by guide rod nuts 15. One end of the lower guide rod 14 passes through the third through hole 60 at the bottom of the fixed pressure plate 1, through the first sealing groove 70 at the bottom of the multiple plates 7 and the second sealing groove 80 at the bottom of the movable clamping plate 2, and exits through the third through hole 60 at the bottom of the column 16. Both ends of the lower guide rod 14 are fixed to the fixed pressure plate 1 and the column 16 by guide rod nuts 15. The upper guide rod 13 and the lower guide rod 14 are used to clamp the upper and lower ends of the plates 7 and the movable clamping plate 2, making the plates 7 more stable between the fixed pressure plate 1 and the movable clamping plate 2.

[0022] Cold fluid inlet pipe 3, cold fluid outlet pipe 4, hot fluid inlet pipe 5, and hot fluid outlet pipe 6 are all located on the outer surface of the fixed pressure plate 1 and are all connected to the plate 7. Cold fluid inlet pipe 3 and cold fluid outlet pipe 4 are diagonally arranged on the surface of the fixed pressure plate 1, with cold fluid inlet pipe 3 located below cold fluid outlet pipe 4; hot fluid inlet pipe 5 and hot fluid outlet pipe 6 are diagonally arranged on the surface of the fixed pressure plate 1, with hot fluid inlet pipe 5 located above hot fluid outlet pipe 6.

[0023] The central processing unit 8 and the power module 20 are mounted on the surface of the fixed clamping plate 1. In this embodiment, a housing 90 is mounted on the surface of the fixed clamping plate 1, and the central processing unit 8 and the power module 20 are housed within the housing 90. Two pressure sensors 9 are provided, respectively located at the inlets of the cold fluid inlet pipe 3 and the hot fluid inlet pipe 5. Two flow regulating valves 10 are provided, respectively located on the cold fluid inlet pipe 3 and the hot fluid inlet pipe 5. Both pressure sensors 9 and both flow regulating valves 10 are electrically connected to the central processing unit 8, and the power module 20 provides the operating voltage. Temperature sensors 30, electrically connected to the central processing unit 8, are also provided at the inlets of the cold fluid inlet pipe 3 and the hot fluid inlet pipe 5. In this embodiment, the pressure sensors 9 are resistive pressure sensors; the temperature sensors 30 are DS18B20 temperature sensors; the central processing unit 8 is a microcontroller module; and the two flow regulating valves 10 are represented by M1 and M2 in the circuit.

[0024] The principle of this invention is as follows: Driven by a pump, cold and hot fluids flow into the device from the cold fluid inlet pipe 3 and the hot fluid inlet pipe 5, respectively. The cold and hot fluids pass through a pressure sensor 9 and a temperature sensor 30. The pressure sensor 9 converts the pressure signal into an electrical signal that can be recognized by the monitoring and control system and sends it to the central processing unit 8. The temperature sensor 30 detects the fluid temperature and sends the detection signal to the central processing unit 8. When pressure fluctuations occur, the central processing unit 8 adjusts the opening of the flow control valve 10 to ensure that the fluid flows into the device at a stable pressure. After the hot and cold fluids enter the device, they are separated by a plate 7, which is a key medium for heat transfer. The hot fluid flows in through the hot fluid inlet pipe 5 and out through the hot fluid outlet pipe 6, while the cold fluid flows in through the cold fluid inlet pipe 3 and out through the cold fluid outlet pipe 4. By flowing the fluids diagonally, the heat exchange efficiency is greatly improved.

[0025] Furthermore, the surface of plate 7 in this device features micro-dimples and serrated edges. This structural design allows the fluid to flow more evenly across the heat exchanger surface after entering the channel, extending the fluid path and ensuring sufficient contact within a limited space, thereby improving the heat exchanger's efficiency. Because plate 7 is very thin, heat can be rapidly transferred within it to the phase change material on the other side, and then transferred to the cold fluid via convection. The cold fluid absorbs heat and its temperature rises, while the hot fluid loses heat and its temperature decreases. This process continues, resulting in constant heat exchange between the cold and hot fluids. During heat transfer, the phase change material may undergo a phase change. For example, when the cold fluid absorbs heat to the melting point of the phase change material, the material changes from solid to liquid, absorbing a large amount of heat for energy storage; when the hot fluid temperature decreases, the material changes back from liquid to solid, releasing heat, further enhancing the heat transfer effect and time span, and improving the overall thermal performance of the device.

[0026] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A plate-type phase change energy storage heat exchanger device, comprising a fixed clamping plate (1), a movable clamping plate (2), a cold fluid inlet pipe (3), a cold fluid outlet pipe (4), a hot fluid inlet pipe (5), a hot fluid outlet pipe (6), plates (7), and connecting parts; the fixed clamping plate (1) and the movable clamping plate (2) are spaced apart; multiple plates (7) are provided, and the multiple plates (7) are arranged between the fixed clamping plate (1) and the movable clamping plate (2), with one side of the plate (7) facing the fixed clamping plate. The plate (1) has a phase change material on the other side; the connector is set between the fixed clamping plate (1) and the movable clamping plate (2) to connect the fixed clamping plate (1) and the movable clamping plate (2) and fix multiple plates (7) between the fixed clamping plate (1) and the movable clamping plate (2); the cold fluid inlet pipe (3), the cold fluid outlet pipe (4), the hot fluid inlet pipe (5), and the hot fluid outlet pipe (6) are all set on the plate surface at the outer end of the fixed clamping plate (1) and are all connected to the plates (7); Its features are: It also includes a central processing unit (8), pressure sensors (9), flow regulating valves (10) and a power module (20); the surface of the plate (7) is provided with small pits (71), and the edge of the plate (7) is serrated; the central processing unit (8) and the power module (20) are disposed on the plate surface of the fixed clamping plate (1); two pressure sensors (9) are provided, respectively disposed at the inlets of the cold fluid inlet pipe (3) and the hot fluid inlet pipe (5); two flow regulating valves (10) are provided, respectively disposed on the pipes of the cold fluid inlet pipe (3) and the hot fluid inlet pipe (5); both pressure sensors (9) and two flow regulating valves (10) are electrically connected to the central processing unit (8), and the power module (20) is used to provide the working voltage.

2. The plate phase change energy storage heat exchanger device according to claim 1, characterized in that: The inlets of the cold fluid inlet pipe (3) and the hot fluid inlet pipe (5) are also equipped with temperature sensors (30) that are electrically connected to the central processing unit (8).

3. The plate phase change energy storage heat exchanger device according to claim 1, characterized in that: The connector includes multiple screws (11) and multiple fixing nuts (12). The two sides of the fixed clamping plate (1) and the movable clamping plate (2) are provided with first through holes (40) through the screws (11). The two ends of the screws (11) pass through the first through holes (40) of the fixed clamping plate (1) and the movable clamping plate (2) respectively and are connected to the fixing nuts (12). Multiple plates (7) are arranged between the screws (11) on both sides of the fixed clamping plate (1) and the movable clamping plate (2).

4. The plate phase change energy storage heat exchanger device according to claim 3, characterized in that: The connector also includes an upper guide rod (13), a lower guide rod (14), a guide rod nut (15), and a column (16). The column (16) is located beside the movable clamping plate (2), which is positioned between the column (16) and the fixed clamping plate (1). The upper plate surface of the fixed clamping plate (1) and the upper end surface of the column (16) are both provided with a second through hole (50) through the upper guide rod (13), and the lower plate surface of the fixed clamping plate (1) and the lower end surface of the column (16) are both provided with a third through hole (60) through the lower guide rod (14). The upper end of the plate (7) and the upper end of the movable clamping plate (2) are provided with a first sealing groove (70) through the upper guide rod (13), and the lower end of the plate (7) and the lower end of the movable clamping plate (2) are provided with a second sealing groove (70) through the lower guide rod (14). 80); One end of the upper guide rod (13) passes through the second through hole (50) of the fixed pressure plate (1), through the first sealing groove (70) at the upper end of the multiple plates (7) and the second sealing groove (80) at the upper end of the movable clamping plate (2), and exits through the second through hole (50) at the upper end of the column (16). The two ends of the upper guide rod (13) are fixed to the fixed pressure plate (1) and the column (16) by the guide rod nut (15); One end of the lower guide rod (14) passes through the third through hole (60) at the lower end of the fixed pressure plate (1), through the first sealing groove (70) at the lower end of the multiple plates (7) and the second sealing groove (80) at the lower end of the movable clamping plate (2), and exits through the third through hole (60) at the lower end of the column (16). The two ends of the lower guide rod (14) are fixed to the fixed pressure plate (1) and the column (16) by the guide rod nut (15).

5. The plate phase change energy storage heat exchanger device according to claim 1, characterized in that: The cold fluid inlet pipe (3) and the cold fluid outlet pipe (4) are arranged diagonally on the plate surface of the fixed pressure plate (1), and the cold fluid inlet pipe (3) is located below the cold fluid outlet pipe (4); the hot fluid inlet pipe (5) and the hot fluid outlet pipe (6) are arranged diagonally on the plate surface of the fixed pressure plate (1), and the hot fluid inlet pipe (5) is located above the hot fluid outlet pipe (6).

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