Heat storage system

Abstract

The invention relates to a heat storage system, which comprises an air duct main path, a heat storage system and a heat exchange system, the two ends of the air duct main path are both connected with the heat storage module, the heat storage module comprises a heating chamber and a heat storage unit, the heating chamber comprises a heating piece and an enclosed cavity wall, the heating piece is arranged in an air cavity formed by the cavity wall, and the air cavity communicates with the air duct main path and the heat storage unit; and the heat exchanger is used for being connected with a heat user, and the air duct main path can exchange heat with the heat user through the heat exchanger. When the heating piece is used for heating, heat of high-temperature radiation can be transferred to the heat storage unit through the material of the cavity wall and transferred through the cavity wall, so that the heat of the heating piece can be well taken away, the temperature does not exceed the use temperature, and the service life is prolonged. The cavity structure prevents heat dissipation and effectively guarantees the heat transfer effect, meanwhile, due to the fact that heat is radiated on the cavity wall, circulating gas rapidly transfers the heat of the heating piece to the heat storage unit through the cavity wall, and under multiple heat exchange measures, the heat exchange efficiency and the heating time are effectively guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the field of heat storage, and in particular, to a heat storage system. Background Art

[0002] In the current solid heat storage method, the heating form is mainly indirect resistance heating. However, in this heating method, not only will the heat of the heating element not be taken away in time, which will cause the heating element to burn out and affect the service life. At the same time, due to the one-way arrangement of heating and materials, the temperature unevenness between material modules is more prominent, which will also affect the heat exchange effect with the heat user during the subsequent heat release process of the heat storage material. With the increasing requirements for the quality of the heat output products of the heat storage system, the thermal conductivity of the heat storage material is also gradually improved. At the same time, in order to meet the requirements of large-scale heat storage needs, it is also imperative to increase the electric heating loading voltage of the heat storage system. Summary of the invention

[0003] The purpose of the present disclosure is to provide a heat storage system to improve the heat transfer effect and make the heat storage of the heat storage unit more uniform while ensuring that high thermal conductivity materials are loaded with high voltage.

[0004] In order to achieve the above objectives, the present disclosure provides a heat storage system, comprising: The main air duct, including the fan; A heat storage module, both ends of the main air duct are connected to the heat storage module, the heat storage module includes a heating chamber and a heat storage unit, the heating chamber includes a heating element and a cavity wall surrounded by the heating element, the heating element is arranged in an air cavity formed by the cavity wall, and the air cavity is respectively connected to the main air duct and the heat storage unit; and The heat exchanger is used to connect to a heat user, and the main air duct can exchange heat with the heat user through the heat exchanger.

[0005] Optionally, the heat storage unit is provided with a plurality of air holes penetrating the heat storage unit at intervals, and the air holes are connected to the air cavity, so that the gas in the air cavity can exchange heat with the heat storage unit through the air holes and pass out of the heat storage unit.

[0006] Optionally, the cavity wall and the heat storage unit are arranged in close contact with each other.

[0007] Optionally, the heating element includes a plurality of electric heating tubes arranged at intervals, and the electric heating tubes are used to be connected to an external power source.

[0008] Optionally, the cavity wall is made of a carbon-based material.

[0009] Optionally, a measuring point is provided on the heat storage unit, and the measuring point is selectively connected to a temperature detection element.

[0010] Optionally, the heat storage system further includes an air duct branch bypassing the air duct main path, the air inlet end of the air duct branch is connected to the air outlet end of the fan, and the air outlet end of the air duct branch is connected to the air outlet end of the heat storage module.

[0011] Optionally, flow control valves are provided on both the main air duct and the branch air duct.

[0012] Optionally, the heat exchanger is connected to the air outlet end of the main air duct.

[0013] Optionally, the heat storage module includes a plurality of the heating chambers and a plurality of the heat storage units, and the heating chambers and the heat storage units are alternately connected along a preset direction.

[0014] Through the above technical solution, a cavity wall is set around the heating element. When the heating element is heated, the heat radiated by its high temperature will be transferred to the heat storage unit through the material of the cavity wall. The heat transfer through the cavity wall can not only take away the heat of the heating element well, but also ensure that its temperature does not exceed the use temperature, thereby extending the service life of the heating element. In addition, the structure of the cavity can prevent heat from escaping and effectively ensure the heat transfer effect. At the same time, since the heat is radiated on the cavity wall, the heat of the heating element can be quickly transferred to the heat storage unit through the cavity wall, and the circulating gas transfers the heat to the heat storage unit. Under multiple heat exchange measures, the heat exchange efficiency and heating time are effectively guaranteed.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a schematic diagram of a heat storage system according to an embodiment of the present disclosure.

[0017] Figure 2 Schematic diagram of a heating chamber in a heat storage system according to an embodiment of the present disclosure.

[0018] Description of Reference Numerals 1-main air duct; 11-fan; 2-heat storage module; 21-heating chamber; 210-air cavity; 211-heating element; 212-cavity wall; 22-heat storage unit; 221-air hole; 222-measuring point; 3-heat exchanger; 4-air duct branch; 5-heat user. DETAILED DESCRIPTION

[0019] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0020] In the present disclosure, in the absence of any contrary description, the directional words used, such as "inside", "outside", are defined with respect to the contours of the corresponding components. In addition, in the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements.

[0021] According to one embodiment of the present disclosure, Figure 1 and Figure 2 As shown, a heat storage system is provided, including a main air duct 1, a heat storage module 2 and a heat exchanger 3. The main air duct 1 includes a fan 11, and both ends of the main air duct 1 are connected to the heat storage module 2. The heat storage module 2 may include a heating chamber 21 and a heat storage unit 22. The heating chamber 21 includes a heating element 211 and a cavity wall 212 enclosed therein. The heating element 211 is arranged in an air cavity 210 formed by the cavity wall 212. The air cavity 210 is respectively connected to the main air duct 1 and the heat storage unit 22. The heat exchanger 3 is used to connect to a heat user 5. The main air duct 1 can exchange heat with the heat user 5 through the heat exchanger 3.

[0022] Through the above technical solution, the cavity wall 212 is set around the heating element 211 to wrap it. When the heating element 211 is heated, the heat radiated by its high temperature will be transferred to the heat storage unit 22 through the material of the cavity wall 212. The heat transfer through the cavity wall 212 can not only take away the heat of the heating element 211 well, but also ensure that its temperature does not exceed the use temperature, thereby extending the service life of the heating element 211. In addition, the structure of the cavity can prevent heat from escaping and effectively ensure the heat transfer effect. At the same time, since the heat is radiated on the cavity wall 212, the heat of the heating element 211 can be quickly transferred to the heat storage unit 22 through the cavity wall 212, and the circulating gas transfers the heat to the heat storage unit 22. Under multiple heat exchange measures, the heat exchange efficiency and heating time are effectively guaranteed.

[0023] It should be noted that if Figure 2As shown, the heating element 211 may include a plurality of electric heating tubes arranged at intervals, and the electric heating tubes may maintain a sufficient insulation distance from the cavity wall 212 and the heat storage unit 22, so that high voltage heating can be achieved, that is, a higher voltage can be loaded on the electric heating tube during heating, so as to better adapt to the use scenario and reduce the electrical cost of the entire system. It should be noted that the setting of the insulation distance can be set according to actual needs, and the present disclosure is not limited here. Here, the electric heating tube can be used to connect to an external power supply so that the electric heating tube heats the cavity wall 212, thereby radiating heat to the cavity wall 212. The spacing arrangement of multiple electric heating tubes can enhance the heat radiation effect on the cavity wall 212. The electric heating tube can be a U-shaped tube, so that the wiring can be connected from the same side when the power supply is connected. Specifically, the end of the U-shaped tube can be connected to the top wall of the heating chamber 21, so that the wind hole 221 described below can be avoided to reduce the impact on the air supply of the heat storage unit 22 and enhance the heat storage effect of the heat storage unit 22. The cavity wall 212 can be made of a carbon-based material. The carbon-based material is light and has good compressive strength. It also has good heat transfer effect and high temperature resistance, so it is easy to transfer heat to the heat storage unit 22. The heat storage unit 22 can also be made of carbon-based material, which can effectively improve the heat storage temperature range of the heat storage unit 22.

[0024] Furthermore, if Figure 1 As shown, the heat storage unit 22 may be provided with a plurality of air holes 221 penetrating the heat storage unit 22 at intervals, and the air holes 221 are in communication with the air cavity 210, so that the gas in the air cavity 210 can exchange heat with the heat storage unit 22 through the air holes 221 and pass out of the heat storage unit 22. The plurality of air holes 221 arranged at intervals can allow the air flow to flow through different positions of the heat storage unit 22, so as to improve the heat storage uniformity of the heat storage unit 22.

[0025] When the heat storage system starts heating, the fan 11 is turned on, so that the gas passing through the air cavity 210 is heated. After the heating element 211 is powered on, the temperature can reach above 1200°C. The heat generated by the heating element 211 is transferred to the heat storage unit 22 through the radiation cavity wall 212, and the heat generated in the heating chamber 21 is transferred to the heat storage unit 22. At this time, the low-temperature gas will also be heated by the fan 11 through the main air duct 1 to the heating chamber 21, and after heating, it will be transferred to the heat storage unit 22 through the air hole 221, completing the heat storage process.

[0026] When the heat storage system starts to release heat, the connection between the heating element 211 and the external power supply is cut off, and the fan 11 is turned on, so that the gas is heated after passing through the heat storage unit 22. The heated high-temperature gas enters the heat exchanger 3 and exchanges heat with the pipeline leading to the heat user 5. After passing through the heat exchanger 3, the low-temperature gas that has been cooled by exchanging heat is circulated back to the heat storage unit 22 through the main air duct 1 through the fan 11, completing the cycle.

[0027] According to one embodiment of the present disclosure, Figure 1As shown, the cavity wall 212 and the heat storage unit 22 can be arranged in close contact with each other to further enhance the heat transfer capacity of the cavity wall 212 to the heat storage unit 22 and enhance the heat storage effect of the heat storage unit 22 .

[0028] According to an embodiment of the present disclosure, a measuring point 222 is provided on the heat storage unit 22, and the measuring point 222 can be selectively connected to a temperature detection element. By connecting the temperature detection element at the measuring point 222 to collect the temperature data of the heat storage unit 22, the heat storage unit 22 is monitored in time, so that the staff can judge the state of the heat storage unit 22, and adjust the power of the heating element 211 in time to control the heating temperature, so that the heat storage temperature of each heat storage unit 22 can be averaged to ensure the heat storage effect of the heat storage module 2. Here, when the power of the heating element 211 can be controlled, the temperature of the heat storage unit 22 can be 900°C-1000°C to increase the life of the heat storage unit 22, and the present disclosure does not limit this.

[0029] According to one embodiment of the present disclosure, Figure 1 As shown, the heat storage system also includes a duct branch 4 connected to the main duct 1, and the air inlet end of the duct branch 4 can be connected to the air outlet end of the fan 11, that is, the air inlet end of the duct branch 4 is located upstream of the air inlet end of the heat storage module 2, and the air outlet end of the duct branch 4 can be connected to the air outlet end of the heat storage module 2. In this way, the gas flow rate from the main duct 1 to the heat storage module 2 can be controlled, thereby controlling the temperature of the gas entering the heat exchanger 3. Specifically, the main duct 1 and the duct branch 4 can be provided with a flow control valve, and by controlling the opening of the flow control valve, the gas flow rate of the duct branch 4 and the main duct 1 can be more accurately adjusted to more accurately control the temperature of the gas entering the heat exchanger 3 according to the use requirements, so as to improve the flexibility of the heat storage system. A three-way valve can also be provided at the connection between the air inlet end of the duct branch 4 and the main duct 1 to control the gas flow rate of the duct branch 4 and the main duct 1, and the present disclosure does not limit this.

[0030] Furthermore, the heat exchanger 3 can also be connected to the outlet end of the main air duct 1. Since the branch air duct 4 is connected to the main air duct 1, the air inlet end of the heat exchanger 3 is also located downstream of the outlet end of the branch air duct 4. In this way, the unheated gas in the branch air duct 4 can be mixed with the hot air in the main air duct 1 before entering the heat exchanger 3, so as to achieve the purpose of controlling the temperature of the gas entering the heat exchanger 3, and to facilitate cooling the gas temperature before entering the heat exchanger 3 to prevent the heat exchanger 3 from being damaged by excessive temperature. While meeting the product quality, the material used for the heat exchanger 3 can be reduced and the service life of the heat exchanger 3 can be increased. At the same time, by mixing hot and cold air, the temperature of the gas entering the heat exchanger 3 can be kept constant, and the non-steady-state heat exchange of solid heat storage can be converted into steady-state heat exchange, ensuring the stable output of the thermal product parameters of the heat storage system.

[0031] According to one embodiment of the present disclosure, Figure 1 As shown, the heat storage module 2 may include a plurality of heating chambers 21 and a plurality of heat storage units 22. The plurality of heat storage units 22 may not only improve the storage capacity of the heat storage module 2, but also improve the heat storage effect. At the same time, through the interval series arrangement of the heating chambers 21 and the heat storage units 22 and the adjustability of the power of the heating element 211, that is, the arrangement of the heating chambers 21 and the heat storage units 22 alternately connected along a preset direction, not only the temperature uniformity of each heat storage unit 22 is effectively guaranteed, but also the heat storage density of the heat storage system can be effectively improved.

[0032] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0033] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0034] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A heat storage system, characterized in that: include: The main air duct, including the fan; A heat storage module, both ends of the main air duct are connected to the heat storage module, the heat storage module includes a heating chamber and a heat storage unit, the heating chamber includes a heating element and a cavity wall surrounded by the heating element, the heating element is arranged in an air cavity formed by the cavity wall, and the air cavity is respectively connected to the main air duct and the heat storage unit; and The heat exchanger is used to connect to a heat user, and the main air duct can exchange heat with the heat user through the heat exchanger.

2. The heat storage system according to claim 1, characterized in that: The heat storage unit is provided with a plurality of air holes penetrating the heat storage unit at intervals, and the air holes are communicated with the air cavity, so that the gas in the air cavity can exchange heat with the heat storage unit through the air holes and pass out of the heat storage unit.

3. The heat storage system according to claim 1, characterized in that: The cavity wall and the heat storage unit are arranged in close contact with each other.

4. The heat storage system according to claim 1, characterized in that: The heating element comprises a plurality of electric heating tubes arranged at intervals, and the electric heating tubes are used to be connected to an external power source.

5. The heat storage system according to claim 1, characterized in that: The cavity wall is made of carbon-based material.

6. The heat storage system according to claim 1, characterized in that: The heat storage unit is provided with a measuring point, and the measuring point is selectively connected to a temperature detection element.

7. The heat storage system according to claim 1, characterized in that: The heat storage system also includes an air duct branch connected to the air duct main path, the air inlet end of the air duct branch is connected to the air outlet end of the fan, and the air outlet end of the air duct branch is connected to the air outlet end of the heat storage module.

8. The heat storage system according to claim 7, characterized in that: Flow control valves are provided on the main air duct and the branch air duct.

9. The heat storage system according to claim 7, characterized in that: The heat exchanger is connected to the air outlet end of the main air duct.

10. The heat storage system according to any one of claims 1 to 9, characterized in that: The heat storage module includes a plurality of the heating chambers and a plurality of the heat storage units, and the heating chambers and the heat storage units are alternately connected along a preset direction.

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