Solid electric heat storage and conduction device
By designing a solid electric thermal storage device, using resistive wire to heat the heat storage bricks, and storing solar energy through photovoltaic power generation components, the problems of slow heating speed, high cost and limited fuel supply of magnesium-based solid hydrogen storage devices are solved, achieving more efficient heating and lower energy costs.
Patent Information
- Application Number
- CN202420354930.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-26
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-02-26
AI Technical Summary
The magnesium-based solid hydrogen storage device is slow to heat, costly and limited by fuel supply during hydrogen charging and discharging.
A solid electric thermal storage and thermal conduction device is designed, including a heat storage component, a photovoltaic power generation component and an external heat exchanger. The heat storage component consists of a shell, a heat storage brick, a resistive wire, a thermal insulation layer, a frequency converter and a built-in heat exchanger. The heat storage brick is heated by a resistive wire, and the solar energy is converted into electrical energy through a photovoltaic power generation component for storage.
The heating speed of the magnesium-based solid hydrogen storage device during hydrogen charging and discharging is improved, energy costs are reduced, and dependence on fuel supply is reduced.
Smart Images
Figure CN222670789U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of magnesium-based solid-state heat storage and heat conduction, in particular to a solid electric heat storage and heat conduction device. Background Art
[0002] The magnesium-based solid-state hydrogen storage device requires a large amount of heat source during the hydrogen filling process. Currently, the thermal oil heating system uses two forms of heating: electric heating and gas heating.
[0003] The electric heating thermal oil system is a device that uses electric heating elements to convert electrical energy into thermal energy and transfer the thermal energy to the thermal oil for heating. The core component of the electric heating thermal oil furnace is the electric heating element, which is usually made of materials such as resistance wire or electric heating tube. After the electric heating element is powered on, it converts electrical energy into thermal energy, and uses the circulation of thermal oil to transfer heat to the heated object, achieving the purpose of heating and heat supply.
[0004] However, the energy cost of electric heating thermal oil system is relatively high, especially in areas with tight electricity resources, the use of electric heating thermal oil furnace will increase the operating cost; secondly, compared with gas thermal oil furnace, the heating speed of electric heating thermal oil system is slower.
[0005] The gas heat transfer oil system uses natural gas as fuel, generates heat through combustion, uses heat transfer oil as a heat carrier, and transports heat to heat-using equipment through forced circulation of hot oil pumps. The circulating flow of heat transfer oil transfers heat to the heated object to achieve the purpose of heating and heat supply.
[0006] The gas thermal oil boiler of the gas heating system needs to rely on the gas supply. If the regional gas supply is insufficient or unstable, it will affect its use. Utility Model Content
[0007] In view of this, the main purpose of the utility model is to propose a solid electric heat storage and heat conducting device, which aims to solve the technical problems of slow heating speed, high cost and limited fuel supply during the charging and discharging of hydrogen in the existing magnesium-based solid-state hydrogen storage device.
[0008] In order to achieve the above-mentioned purpose, the utility model proposes a solid electric heat storage and heat conduction device, comprising:
[0009] A heat storage component, the heat storage component comprising a shell, heat storage bricks and resistance wires arranged in the shell, and a variable frequency fan and a built-in heat exchanger communicated with the inside of the shell, a plurality of the heat storage bricks are stacked up and down in the shell, and each of the heat storage bricks has the resistance wire built in, the variable frequency fan is suitable for blowing air into the shell and performing heat exchange with the built-in heat exchanger;
[0010] A photovoltaic power generation component is electrically connected to the resistance wire to supply power to the resistance wire;
[0011] The external heat exchanger is communicated with the internal heat exchanger, and the external heat exchanger is suitable for performing heat exchange with the internal heat exchanger.
[0012] Optionally, the heat storage assembly further includes a heat-insulating layer arranged on the inner wall of the shell, and the heat-insulating layer is made of an aerogel material.
[0013] Optionally, a horizontal through hole is provided on the heat storage brick, and the resistance wire is located in the through hole.
[0014] Optionally, a temperature transmitter, a control valve and a circulating oil pump are further connected between the built-in heat exchanger and the external heat exchanger, and the circulating oil pump is suitable for heat exchange between the circulating heat transfer oil in the built-in heat exchanger and the solid hydrogen storage material on the external heat exchanger.
[0015] Optionally, the photovoltaic power generation assembly includes a solar panel, a controller and an inverter, and the solar panel, the controller and the inverter are electrically connected.
[0016] Optionally, the length of the heat storage brick is shorter than the length of the shell, and the length of the heat storage brick is longer than the length of the resistance wire.
[0017] Optionally, the stacking height of the heat storage bricks is equal to the inner height of the shell.
[0018] Optionally, the heat storage bricks are made of magnesium oxide material.
[0019] Compared with the prior art, the beneficial effects of the present invention are:
[0020] In the technical scheme of the utility model, the solid electric thermal storage and heat conduction device is mainly composed of a heat storage component, a photovoltaic power generation component and an external heat exchanger, and the heat storage component is mainly composed of a shell, a heat storage brick, a resistance wire, an insulation layer, a variable frequency fan and a built-in heat exchanger, etc., wherein the resistance wire is responsible for heating the heat storage brick and storing energy; the heat storage brick is provided with an insulation layer on the outside, and the insulation layer adopts 150mm nano aerogel, which can reduce the heat loss of the heat storage brick; the variable frequency fan is connected to the inside of the shell, and the variable frequency fan can be used to adjust the air volume and control the heat exchange temperature; the built-in heat exchanger exchanges heat through the variable frequency fan to achieve the heating requirement, and the solid electric thermal storage and heat conduction device converts solar energy into electrical energy by utilizing the photovoltaic power generation component during the day, and then converts the electrical energy into heat energy, which is stored in the heat storage brick of the heat storage component, and the external heat exchanger is connected to the built-in heat exchanger, so that the external heat exchanger can exchange heat with the built-in heat exchanger, and can be taken out from the built-in heat exchanger for use at any time when needed, thereby improving the heating speed of the magnesium-based solid-state hydrogen storage device during the hydrogen charging and discharging process. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0022] Figure 1 This is a schematic diagram of the overall structure of the solid electric heat storage and heat conduction device provided by the utility model;
[0023] Figure 2 This is a schematic diagram of the structure of the heat storage component in the embodiment of the utility model;
[0024] Figure 3 It is a schematic diagram of the structure of the photovoltaic power generation component in the embodiment of the utility model.
[0025] Description of Figure Numbers:
[0026] 1-heat storage component;
[0027] 11-shell; 12-heat storage brick; 121-through hole; 13-resistance wire; 14-insulation layer; 15-frequency conversion fan; 16-built-in heat exchanger;
[0028] 2-photovoltaic power generation component; 21-solar panel; 22-controller; 23-inverter;
[0029] 3- Temperature transmitter;
[0030] 4-Control valve;
[0031] 5-External heat exchanger; 6-Circulating oil pump. DETAILED DESCRIPTION
[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0034] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0035] See also Figure 1-3 As shown, the embodiment of the utility model provides a solid electric thermal storage and heat conduction device, which includes a thermal storage component 1, a photovoltaic power generation component 2 and an external heat exchanger 5, wherein:
[0036] The heat storage assembly 1 includes a shell 11, heat storage bricks 12, a resistance wire 13, a variable frequency fan 15 and a built-in heat exchanger 16. The heat storage bricks 12 and the resistance wire 13 are both arranged in the shell 11. The interior of the shell 11 is also connected to the variable frequency fan 15 and the built-in heat exchanger 16. Several heat storage bricks 12 are stacked up and down in the shell 11, and each heat storage brick 12 has a built-in resistance wire 13. The variable frequency fan 15 is suitable for blowing air into the shell 11 and exchanging heat with the built-in heat exchanger 16.
[0037] The photovoltaic power generation assembly 2 is electrically connected to the resistance wire 13 to supply power to the resistance wire 13 , and the resistance wire 13 generates heat after being energized.
[0038] The external heat exchanger 5 is in communication with the internal heat exchanger 16 , and the external heat exchanger 5 is suitable for performing heat exchange with the internal heat exchanger 16 .
[0039] The solid electric heat storage and heat conducting device utilizes the solid electric heat storage technology to convert electric energy into heat energy and stores it in the heat storage brick 12, so that it can be taken out and used at any time when needed.
[0040] The heat storage assembly 1 is mainly composed of a shell 11, heat storage bricks 12, a resistance wire 13, a thermal insulation layer 14, a variable frequency fan 15 and a built-in heat exchanger 16, wherein the resistance wire 13 is responsible for heating the heat storage bricks 12 and storing energy.
[0041] The main material of the heat storage brick 12 is magnesium oxide, which has the advantages of high temperature resistance, good thermal stability and high strength. The attenuation rate of the heat storage brick 12 in this embodiment does not exceed 1%, has a high thermal conductivity and a small volume density, and can effectively improve the temperature uniformity and thermal efficiency in the furnace.
[0042] The heat storage brick 12 is provided with a heat preservation layer 14 on its outside. The heat preservation layer 14 is made of 150 mm nano-aerogel. Under rated working conditions, the surface temperature of the heat preservation layer 14 does not exceed the ambient temperature by 15° C., which can reduce the heat loss of the heat storage brick 12 .
[0043] The variable frequency fan 15 can be used to adjust the air volume and control the heat exchange temperature; the built-in heat exchanger 16 performs heat exchange through the variable frequency fan 15 to achieve the heating requirement.
[0044] Specifically, the solid electric heat storage and heat conducting device converts solar energy into electrical energy by utilizing the photovoltaic power generation component 2 during the day, and then converts the electrical energy into thermal energy, which is stored in the thermal storage bricks of the thermal storage component 1 and can be taken out and used at any time when needed.
[0045] The main components of the photovoltaic power generation assembly 2 are composed of electronic components, which mainly include a solar cell panel 21, a controller 22 and an inverter 23.
[0046] Photovoltaic power generation components 2 are reliable, stable, long-lasting, and easy to install and maintain. Compared with other types of power generation technologies, photovoltaic power generation does not require a conversion process, the power generation process is extremely simple, and does not consume resources. It has the advantages of environmental protection, flexibility, safety, and reliability. Because solar energy is an inexhaustible green energy, there is no need to buy fuel, which saves economic costs and does not have carbon emissions.
[0047] During the low electricity consumption period at night, the heat storage component 1 of the solid electric heat storage device is started, and the resistance wire 13 is used to heat the heat storage brick 12, converting electrical energy into thermal energy and storing it in the heat storage brick 12. When the set heat storage temperature is reached or the low electricity consumption period ends, the heating power supply is automatically cut off and the heat storage ends.
[0048] When heating is needed during the day or during peak power periods, the built-in heat exchanger 16 in the heat storage component 1 starts to operate in conjunction with the variable frequency fan 15, and the heat in the heat storage bricks 12 is extracted in the form of hot air and sent to the built-in heat exchanger 16 through the flow channel. The heat transfer oil circulating medium flowing through the built-in heat exchanger 16 is then heated by the built-in heat exchanger 16. At this time, the circulating oil pump 6 is interlocked with the variable frequency fan 15 and started together. The heat transfer oil after heat exchange is supplied to the coil of the external heat exchanger 5 through the action of the high-temperature circulating oil pump to heat the magnesium alloy material, thereby achieving heat exchange, so that the magnesium-based solid hydrogen storage material absorbs or releases hydrogen.
[0049] Furthermore, the heat storage assembly 1 also includes a heat-insulating layer 14 disposed on the inner wall of the shell 11 , and the heat-insulating layer 14 is made of aerogel material.
[0050] Specifically, see Figure 2 As shown, in a specific solution of the present utility model, the heat storage component 1 further includes a heat-insulating layer 14 , and the heat-insulating layer 14 is laid on the inner wall of the shell 11 , so as to ensure that the heat in the shell 11 is not dissipated.
[0051] It should be noted that the outside of the heat storage brick 12 is equipped with an insulation layer 14, which is made of 150mm nano aerogel. Under rated working conditions, the surface temperature of the insulation layer 14 does not exceed the ambient temperature by 15°C, which can reduce the heat loss of the heat storage brick 12.
[0052] Furthermore, a horizontal through hole 121 is formed on the heat storage brick 12 , and the resistance wire 13 is located in the through hole 121 .
[0053] Specifically, see Figure 2 As shown, in a specific solution of the utility model, a through hole 121 for installing the resistance wire 13 is opened on the heat storage brick 12, so that the heat emitted by the resistance wire 13 can be transferred to the heat storage brick 12 as much as possible.
[0054] Furthermore, a temperature transmitter 3, a control valve 4 and a circulating oil pump 6 are connected between the built-in heat exchanger 16 and the external heat exchanger 5, and the circulating oil pump 6 is suitable for heat exchange between the circulating heat transfer oil in the built-in heat exchanger 16 and the solid hydrogen storage material on the external heat exchanger 5.
[0055] Specifically, see Figure 1 , 2 As shown, in the specific scheme of the utility model, a first medium inlet and a first medium outlet are respectively provided on one side of the built-in heat exchanger 16, the first medium inlet is connected to the circulating oil pump 6 via the temperature transmitter 3, and then the first medium outlet is connected to the second medium inlet of the external heat exchanger 5 via the temperature transmitter 3 and the control valve 4 in sequence, and the second medium outlet of the external heat exchanger 5 is connected to the circulating oil pump 6 via the control valve 4, thereby realizing heat exchange between the built-in heat exchanger 16 and the external heat exchanger 5.
[0056] Furthermore, the photovoltaic power generation assembly 2 includes a solar panel 21 , a controller 22 and an inverter 23 , and the solar panel 21 , the controller 22 and the inverter 23 are electrically connected.
[0057] Specifically, see Figure 3 As shown, in the specific scheme of the utility model, the basic components of the photovoltaic power generation assembly 2 include solar panels 21, controller 22 and inverter 23, etc., and its main components are composed of electronic components, and no mechanical components are involved. During the day, the photovoltaic power generation assembly 2 is used to convert solar energy into electrical energy of the resistance wire 13, and then the electrical energy is converted into heat energy, which is stored in the heat storage brick 12 and can be taken out and used at any time when needed.
[0058] Therefore, photovoltaic power generation equipment is extremely refined, reliable, stable, long-life, and easy to install and maintain. Compared with other types of power generation technologies, photovoltaic power generation does not require a conversion process, the power generation process is extremely simple, and does not consume resources. It has the advantages of environmental protection, flexibility, safety, and reliability.
[0059] Secondly, the solar panel 21 obtains solar energy, which is an inexhaustible green energy. There is no need to buy fuel, which saves economic costs and does not cause carbon emissions.
[0060] Furthermore, the length of the heat storage brick 12 is smaller than the length of the shell 11 , and the length of the heat storage brick 12 is greater than the length of the resistance wire 13 .
[0061] In this embodiment, the length of the heat storage brick 12 is smaller than the length of the shell 11 , so that air duct space is left on both sides of the shell 11 to facilitate air flow in the shell 11 .
[0062] Furthermore, the stacking height of the heat storage bricks 12 is equal to the inner height of the shell 11 .
[0063] Specifically, see Figure 2 As shown, in a specific solution of the present utility model, the upper and lower tops of the heat storage bricks 12 are respectively attached to the upper and lower surfaces of the shell 11 to form an air duct with a fixed flow direction.
[0064] Furthermore, the heat storage brick 12 is made of magnesium oxide material. Magnesium oxide material has the advantages of high temperature resistance, good thermal stability, high strength, etc. In this embodiment, the heat storage brick 12 has a decay rate of no more than 1% after 30 years, has a high thermal conductivity and a small volume density, and can effectively improve the temperature uniformity and thermal efficiency in the furnace.
[0065] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.
Claims
1. A solid electric heat storage and heat conducting device, characterized in that: include: A heat storage component (1), the heat storage component (1) comprising a shell (11), heat storage bricks (12) and a resistance wire (13) arranged in the shell (11), and a variable frequency fan (15) and a built-in heat exchanger (16) connected to the inside of the shell (11), a plurality of the heat storage bricks (12) are stacked up and down in the shell (11), and each of the heat storage bricks (12) has the resistance wire (13) built in, and the variable frequency fan (15) is suitable for blowing air into the shell (11) and performing heat exchange with the built-in heat exchanger (16); A photovoltaic power generation component (2) is electrically connected to the resistance wire (13) to supply power to the resistance wire (13); The external heat exchanger (5) is in communication with the internal heat exchanger (16), and the external heat exchanger (5) is suitable for performing heat exchange with the internal heat exchanger (16).
2. The solid electric heat storage and heat conducting device according to claim 1, characterized in that: The heat storage component (1) further comprises a heat-insulating layer (14) arranged on the inner wall of the shell (11), and the heat-insulating layer (14) is made of aerogel material.
3. The solid electric heat storage and heat conducting device according to claim 1, characterized in that: The heat storage brick (12) is provided with a horizontally penetrating through hole (121), and the resistance wire (13) is located in the through hole (121).
4. The solid electric heat storage and heat conducting device according to any one of claims 1 to 3, characterized in that: A temperature transmitter (3), a control valve (4) and a circulating oil pump (6) are also connected between the built-in heat exchanger (16) and the external heat exchanger (5), and the circulating oil pump (6) is suitable for heat exchange between the circulating heat transfer oil in the built-in heat exchanger (16) and the solid hydrogen storage material on the external heat exchanger (5).
5. The solid electric heat storage and heat conducting device according to claim 1, characterized in that: The photovoltaic power generation assembly (2) comprises a solar panel (21), a controller (22) and an inverter (23), and the solar panel (21), the controller (22) and the inverter (23) are electrically connected.
6. The solid electric heat storage and heat conducting device according to claim 4, characterized in that: The length of the heat storage brick (12) is shorter than the length of the shell (11), and the length of the heat storage brick (12) is longer than the length of the resistance wire (13).
7. The solid electric heat storage and heat conducting device according to claim 6, characterized in that: The stacking height of the heat storage bricks (12) is equal to the inner height of the shell (11).
8. The solid electric heat storage and heat conducting device according to claim 7, characterized in that: The heat storage brick (12) is made of magnesium oxide material.