A thermal storage system
By using an electromagnetic heating mechanism and iron ore material on the outside of the thermal storage brick, non-contact and efficient heating is achieved, solving the problems of high energy consumption and easy aging of traditional thermal storage systems, and improving the efficiency and safety of the thermal storage system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SIAN NEW ENERGY CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-14
AI Technical Summary
Existing thermal storage systems use traditional heating methods, which result in high energy consumption, easy aging of the structure, and problems such as thermal fatigue and insulation failure.
An electromagnetic heating mechanism is used to generate a high-frequency electromagnetic field on the outside of the heat storage brick through an electromagnetic coil, thereby achieving non-contact heating. The magnetic response characteristics of the heat storage brick made of iron ore are utilized for efficient heat generation. Combined with an electromagnetic control device, the heating power can be controlled and the heat can be stored efficiently.
It improves the efficiency and safety of thermal storage systems, extends equipment lifespan, reduces energy consumption, adapts to different thermal storage needs, and is suitable for small and medium-sized thermal storage systems and distributed electric thermal storage projects.
Smart Images
Figure CN224498575U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of thermal energy conversion and thermal storage devices, and specifically to a thermal storage system. Background Technology
[0002] In electric thermal storage systems, thermal storage bricks are a key medium for carrying and releasing heat energy, and are widely used in building heating, power peak shaving and valley filling, and industrial waste heat utilization. The mainstream materials for thermal storage bricks are mostly high-density ceramics, alumina, and magnesia, which possess good high-temperature resistance and a certain heat capacity.
[0003] Existing heat storage systems generally use contact heating methods such as resistance wires or heating tubes.
[0004] However, the above heating methods can lead to problems such as thermal fatigue and insulation failure due to long-term contact between the heating element and the heat storage body, affecting the safety and service life of the system. They also have problems such as long heat energy conversion path, high energy consumption, and easy aging of structure. Utility Model Content
[0005] Therefore, the technical problem to be solved by this utility model is to overcome the problems of high energy consumption and easy aging of the structure of existing heat storage systems using traditional heating methods, thereby providing a heat storage system.
[0006] To solve the above-mentioned technical problems, this utility model provides a heat storage system, including: a shell, a heat storage brick, and an electromagnetic heating mechanism. The heat storage brick is disposed inside the shell; the electromagnetic heating mechanism is disposed inside the shell and has an electromagnetic coil, which is spaced out on the outside of the heat storage brick.
[0007] In operation, the electromagnetic heating mechanism generates a high-frequency electromagnetic field around the heat storage brick via an electromagnetic coil. Under the influence of this electromagnetic field, the heat storage brick achieves efficient heating through eddy current heating and hysteresis loss. The electromagnetic coil is positioned on the outer side of the heat storage brick, enabling non-contact heating and avoiding problems such as aging of heating elements, uneven thermal coupling, and safety hazards associated with traditional contact electric heating. This device features high efficiency, strong safety, fast response, and easy integration. The heat storage system provided by this invention solves the problems of high energy consumption and easy aging of the structure in existing heat storage systems using traditional heating methods.
[0008] Optionally, the heat storage brick is made of iron ore. Through the above configuration, using heat storage bricks made primarily of iron ore, compared to commonly used ceramic or magnesia bricks, results in higher brick density, higher thermal conductivity, and better magnetic response characteristics. This overcomes the shortcomings of existing heat storage materials, such as slow response and low energy efficiency, making them suitable for generating and storing heat through electromagnetic induction. Applying iron ore-based heat storage bricks to the field of electromagnetic induction heating fully utilizes their magnetic response characteristics, achieving a heat storage mode with simplified structure and significantly improved heating efficiency.
[0009] Optionally, the heat storage brick is made of iron ore with added reinforcing particles. Through this configuration, the heat storage brick is primarily made of iron ore, with added reinforcing particles to form a composite high thermal conductivity and magnetic response brick body, which can improve its mechanical strength or temperature stability.
[0010] Optionally, the electromagnetic heating mechanism is further provided with an electromagnetic control device, which is electrically connected to the electromagnetic coil. The electromagnetic control device is used to adjust the induction frequency and current intensity of the electromagnetic coil. Through the above configuration, the electromagnetic control device can achieve controllability of heating power, precisely control the electromagnetic heating frequency and power, and adapt to different heat storage requirements.
[0011] Optionally, the outer side of the heat storage brick is provided with a heat insulation structure. This design reduces heat loss and improves heat storage efficiency.
[0012] Optionally, the housing is provided with a support structure, which is configured as a bracket. Through the above configuration, the bracket and housing are designed to support and protect the core components, thereby adapting to the installation environment.
[0013] Optionally, it further includes a heat exchange mechanism connected to the heat storage brick, the heat exchange mechanism being used to transfer heat to an external load. With the above configuration, the heat exchange mechanism uses the heat stored in the heat storage brick for an external load, such as air heating, water heating, or an energy feedback system.
[0014] Optionally, the heat exchange mechanism includes a heat exchanger, wherein a heat exchange medium channel is provided inside the heat exchanger, and the heat exchange medium channel is heat-exchange connected to the heat storage brick. Through the above arrangement, the heat exchange medium transports the heat stored in the heat storage brick to the heat exchanger through the heat exchange medium channel, and exchanges heat with the external load through the heat exchanger.
[0015] Optionally, the heat exchange medium in the heat exchange medium channel is a heat exchange gas, and a fan is installed on the heat exchange medium. With this configuration, the fan enables the heat exchange gas to circulate within the heat exchange medium channel, transferring heat to the heat exchanger, which then supplies it to an external load. Attached Figure Description
[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of one embodiment of the energy storage system provided in this utility model.
[0018] Explanation of reference numerals in the attached figures:
[0019] 1. Heat storage brick; 2. Electromagnetic heating mechanism; 21. Electromagnetic control device; 22. Electromagnetic coil; 3. Thermal insulation structure; 4. Heat exchange mechanism; 41. Heat exchanger; 42. Heat exchange medium channel; 43. Fan. Detailed Implementation
[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0023] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0024] This embodiment provides a structure for a heat storage system that has high thermal conductivity, high heat capacity, and is safe and stable, for heat storage.
[0025] like Figure 1 The figure shows a specific implementation of a heat storage system provided in this embodiment, including: a shell, a heat storage brick 1 and an electromagnetic heating mechanism 2. The heat storage brick 1 is disposed inside the shell; the electromagnetic heating mechanism 2 is disposed inside the shell and has an electromagnetic coil 22, which is spaced out on the outside of the heat storage brick 1.
[0026] In use, the electromagnetic heating mechanism 2 generates a high-frequency electromagnetic field around the heat storage brick 1 through the electromagnetic coil 22. Under the action of the electromagnetic field, the heat storage brick 1 achieves efficient heating through eddy current heating and hysteresis loss. The electromagnetic coil 22 is arranged on the outside of the heat storage brick 1, realizing non-contact heating of the heat storage brick 1, avoiding problems such as aging of heat elements, uneven thermal coupling, and safety hazards caused by traditional contact electric heating. This device has the characteristics of high efficiency, strong safety, fast response, and easy integration, and is convenient for modular structural design, adapting to small and medium-sized thermal storage systems: structurally, it supports single-rotor independent operation, brick array combination, and various installation environments, especially suitable for distributed electric thermal storage projects, meeting the efficient deployment needs of diverse small and medium-sized thermal storage systems. The thermal storage system provided in this embodiment solves the problems of high energy consumption and easy structural aging of existing thermal storage systems using traditional heating methods.
[0027] It should be further explained that, compared to traditional energy storage devices that use heating tubes or heating wires, the temperature of the electric heating element limits the temperature of the energy storage device, and the lifespan of the heating element decreases as the operating temperature increases. The energy storage temperature of commercially available solid-state energy storage devices is limited to 550℃-650℃ by the operating temperature of the heating element. Using electromagnetic induction heating can raise the temperature of the iron heat storage brick 1 to over 1000 degrees Celsius, greatly increasing the energy storage range. When using the same mass of energy storage material, electromagnetic heating increases energy storage capacity by 60%-100% compared to traditional resistance heating. This significantly reduces the amount of energy storage bricks used in the equipment, reducing its size.
[0028] Specifically, the electromagnetic coil 22 can be configured as a multi-segment partition, embedded or mobile module, etc.
[0029] like Figure 1As shown, in the thermal storage system provided in this embodiment, the thermal storage brick 1 is made of iron ore. Compared with commonly used ceramic or magnesia bricks, the thermal storage brick 1, made primarily of iron ore, has higher density, higher thermal conductivity, and better magnetic response characteristics. This overcomes the shortcomings of existing thermal storage materials, such as slow response and low energy efficiency, making it suitable for heating and storing heat through electromagnetic induction. Applying the iron ore-based thermal storage brick 1 to the field of electromagnetic induction heating fully utilizes its magnetic response characteristics, achieving a simplified structure and significantly improved heating efficiency in thermal storage. Alternatively, as an alternative implementation, the thermal storage brick 1 can also be made of iron-based composite materials or low-grade iron ore. Furthermore, to reduce costs, industrial by-product iron slag or low-grade iron ore can be sintered and then used to make bricks for non-high-precision thermal storage scenarios.
[0030] It should be added that the iron-based heat storage brick 1 undergoes a reversible crystal structure change within the temperature range of 750-800℃, generating a portion of latent heat storage and greatly increasing the energy storage density per unit mass.
[0031] Specifically, the heat storage brick 1 can be columnar, annular, hollow, etc., to adapt to different volumes or heating environment requirements.
[0032] like Figure 1 As shown, in the thermal storage system provided in this embodiment, the thermal storage brick 1 is made of iron ore with added reinforcing particles. The thermal storage brick 1 is mainly composed of iron ore, with added reinforcing particles to form a composite high thermal conductivity and magnetic response brick body, which can improve its mechanical strength or temperature stability. Specifically, the reinforcing particles are Al2O3, SiC, etc. Alternatively, as an alternative implementation, the reinforcing particles can be omitted, and the thermal storage brick 1 can be made solely of iron ore.
[0033] like Figure 1 As shown, in the thermal storage system provided in this embodiment, the electromagnetic heating mechanism 2 is further equipped with an electromagnetic control device 21. The electromagnetic control device 21 is electrically connected to the electromagnetic coil 22, and is used to adjust the induction frequency and current intensity of the electromagnetic coil 22. The electromagnetic control device 21 enables controllable heating power, precisely controlling the electromagnetic heating frequency and power, and can adapt to different thermal storage needs. Compared to the traditional resistance heating method in the industry, which is limited by the heating limit of the heater and can only raise the temperature of the energy storage body to 550-650℃, the electromagnetic induction heating method can heat the energy storage body to over 1000℃. Alternatively, as an alternative implementation, the electromagnetic control device 21 can be omitted, and the electromagnetic heating mechanism 2 operates with a specific induction frequency and current intensity.
[0034] Specifically, the control strategy of the electromagnetic control device 21 can be temperature feedback closed-loop control, IoT remote control, integration with renewable energy, etc.
[0035] like Figure 1 As shown, in the thermal storage system provided in this embodiment, a thermal insulation structure 3 is provided on the outside of the thermal storage brick 1. Wrapping the thermal storage brick 1 with a high-efficiency thermal insulation material can reduce heat loss and improve thermal storage efficiency.
[0036] like Figure 1 As shown, in the thermal storage system provided in this embodiment, a support structure is provided on the shell, and the support structure is configured as a bracket. The bracket and the shell are designed to support and protect the aforementioned core components, thereby adapting to the installation environment.
[0037] like Figure 1 As shown, the thermal storage system provided in this embodiment further includes a heat exchange mechanism 4, which is connected to the thermal storage brick 1 and is used to transfer heat to an external load. The heat exchange mechanism 4 uses the heat stored in the thermal storage brick 1 for the external load, such as air heating, water heating, or an energy feedback system. Alternatively, as an alternative implementation, the heat exchange mechanism 4 is omitted, and the heat is used for the external load through a heat release medium.
[0038] like Figure 1 As shown, in the thermal storage system provided in this embodiment, the heat exchange mechanism 4 includes a heat exchanger 41, which has a heat exchange medium channel 42 connected to the heat storage brick 1. The heat exchange medium transports the heat stored in the heat storage brick 1 to the heat exchanger 41 through the heat exchange medium channel 42, and the heat exchanger 41 exchanges heat with the external load.
[0039] like Figure 1 As shown, in the thermal storage system provided in this embodiment, the heat exchange medium in the heat exchange medium channel 42 is a heat exchange gas, and a fan 43 is installed on the heat exchange medium. The fan 43 enables the heat exchange gas to circulate within the heat exchange medium channel 42, transferring heat to the heat exchanger 41, which then serves as an external load. Alternatively, as an alternative implementation, the fan 43 can be replaced with a liquid pump, and the heat exchange medium can be replaced with a liquid medium.
[0040] How to use:
[0041] like Figure 1 As shown, in the heat storage system provided in this embodiment, when in use, the electromagnetic heating mechanism 2 forms a high-frequency electromagnetic field around the heat storage brick 1 through the electromagnetic coil 22. Under the action of the electromagnetic field, the heat storage brick 1 achieves efficient heating under the action of eddy current heating and magnetic hysteresis loss. The electromagnetic coil 22 is arranged on the outside of the heat storage brick 1 to realize non-contact heating of the heat storage brick 1.
[0042] The specific usage steps are as follows:
[0043] 1) The electromagnetic control device 21 inputs high-frequency alternating current to the electromagnetic coil 22, forming an alternating magnetic field around the electromagnetic coil 22;
[0044] 2) The iron-based heat storage brick 1 generates eddy current loss and hysteresis loss due to its internal conductivity and magnetism in an alternating magnetic field, thereby achieving self-heating of the brick body;
[0045] 3) After the heat storage brick 1 is heated to the target temperature, it stores thermal energy;
[0046] 4) Heat can be used for external loads, such as air heating, water heating, or energy storage feedback systems, through heat release medium or heat exchange mechanism 4.
[0047] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.
Claims
1. A thermal storage system, characterized in that, include: case; Heat storage brick (1) is disposed inside the shell; An electromagnetic heating mechanism (2) is disposed inside the housing. The electromagnetic heating mechanism (2) has an electromagnetic coil (22), which is spaced out on the outside of the heat storage brick (1).
2. The thermal storage system according to claim 1, characterized in that, The heat storage brick (1) is made of iron ore.
3. The thermal storage system according to claim 2, characterized in that, The heat storage brick (1) is made of iron ore with added reinforcing particles.
4. The thermal storage system according to claim 1, characterized in that, The electromagnetic heating mechanism (2) is also provided with an electromagnetic control device (21), which is electrically connected to the electromagnetic coil (22). The electromagnetic control device (21) is used to adjust the induction frequency and current intensity of the electromagnetic coil (22).
5. The thermal storage system according to claim 1, characterized in that, The heat storage brick (1) is provided with a heat insulation structure (3) on its outer side.
6. The thermal storage system according to claim 1, characterized in that, The housing is provided with a support structure, which is configured as a bracket.
7. The thermal storage system according to any one of claims 1-6, characterized in that, Also includes: A heat exchange mechanism (4) is connected to the heat storage brick (1) and is used to transfer heat to an external load.
8. The thermal storage system according to claim 7, characterized in that, The heat exchange mechanism (4) includes a heat exchanger (41), which has a heat exchange medium channel (42) and is heat exchanged with the heat storage brick (1).
9. The thermal storage system according to claim 8, characterized in that, The heat exchange medium in the heat exchange medium channel (42) is a heat exchange gas, and a fan (43) is installed on the heat exchange medium.