Heat storage system

Abstract

The invention provides a heat storage system which comprises a heat storage device, the heat storage device comprises a heat storage space, an air inlet and an air outlet, the air inlet and the air outlet communicate with the heat storage space, and a heat storage body used for storing and releasing heat and a heating element capable of heating the heat storage body are arranged in the heat storage space; the heat exchanger is in pipeline connection with the air inlet and the air outlet; the fan is arranged on a pipeline between the heat exchanger and the gas inlet and is used for inputting the gas subjected to heat exchange by the heat exchanger into the heat storage space through the gas inlet; and the gas cylinder is arranged on a pipeline between the fan and the gas inlet and is used for pressurizing the gas filled into the heat storage system. According to the heat storage system, the body can be heated through the heating element, gas in the heat storage system can be pressurized through the gas cylinder, so that the heat release efficiency of the heat storage system is improved, and rapid cooling of the heat storage system can be achieved.

Description

Technical Field

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

[0002] At present, most traditional solid heat storage devices are normal pressure devices. The gas pressure inside the device is at normal pressure during the heat storage process. In addition, the heat transfer efficiency and speed of the traditional closed heat storage unit structure are low, which leads to slow heating and cooling of the heat storage device and easy overflow of high-temperature gas. Summary of the invention

[0003] The purpose of the present disclosure is to provide a heat storage system, which can pressurize the gas inside the heat storage system through an inert gas bottle group and a fan to increase the heat release rate of the heat storage system to at least partially solve the above-mentioned problems. The inert gas bottle group is provided with an interlocking component to maintain the system pressure stability and reduce the pressure instability caused by the change of gas temperature in the system.

[0004] In order to achieve the above-mentioned purpose, the present disclosure provides a heat storage system, comprising a heat storage device, that is, a heat storage space and an air inlet and an air outlet connected to the heat storage space, wherein a heat storage body for storing and releasing heat and a heating element capable of heating the heat storage body are provided in the heat storage space; a heat exchanger, wherein a pipeline is connected to the air inlet and the air outlet; a fan, which is arranged on the pipeline between the heat exchanger and the air inlet and is used to input the gas after heat exchange by the heat exchanger into the heat storage space through the air inlet; and a gas cylinder, which is arranged on the pipeline between the fan and the air inlet and is used to pressurize the gas filled into the heat storage system.

[0005] Optionally, the gas is an inert gas; and the preset pressure in the heat storage system is 0.6-1 MPa.

[0006] Optionally, the heat storage body comprises a first heat storage part and a second heat storage part alternately arranged along a vertical direction of the heat storage space, wherein the heating element is provided in the second heat storage part.

[0007] Optionally, the first heat storage portion is configured as a plate-shaped heat storage body, and the second heat storage portion is configured as a plurality of strip-shaped heat storage bodies, wherein the plurality of strip-shaped heat storage bodies extend along a first direction and are arranged at intervals between two adjacent plate-shaped heat storage bodies along a second direction perpendicular to the first direction, and wherein one heating element is provided between any two adjacent strip-shaped heat storage bodies along the second direction.

[0008] Optionally, the heating element includes: a support member including a mounting groove extending along the first direction, the support member is arranged between two adjacent strip-shaped heat storage bodies; and a heating wire, at least partially arranged in the mounting groove of the support member.

[0009] Optionally, openings are formed at both ends of the mounting groove, and the two openings are respectively connected to the air inlet and the air outlet; a gas distributor connected to the air inlet and the multiple openings is provided in the heat storage device.

[0010] Optionally, the mounting groove is configured as a U-shaped groove, the bottom wall of the U-shaped groove is fitted to the first heat storage portion, and the opposite side walls of the U-shaped groove are fitted to the second heat storage portion.

[0011] Optionally, a thickness of the second heat storage portion along the vertical direction is greater than an extension height of a side wall of the U-shaped groove along the vertical direction.

[0012] Optionally, the heat storage device further comprises a heat-insulating layer; the heat-insulating layer is arranged between the heat storage space and an outer wall of the heat storage device, and a heat-insulating material is arranged in the heat-insulating layer.

[0013] Optionally, the heat storage system further includes a first branch and a second branch which are arranged between the heat exchanger and the fan and are connected in parallel with each other, a preheater is provided on the first branch, and a temperature measuring device is provided at the outlet end of the heat exchanger.

[0014] Optionally, the heat storage device further includes: a temperature sensor, arranged at the air inlet and the air outlet; a pressure sensor, arranged at the top of the heat storage device; a flow meter, arranged at the air inlet and the air outlet, and a safety valve, arranged at the top of the heat storage device.

[0015] By means of the above technical solution, i.e. the heat storage system provided by the present invention, the heating element inside the heat storage device can heat the heat storage body. After the heat storage body is heated to the preheating temperature, the fan can be turned on to transport the normal temperature gas to the heat storage space through the air inlet to absorb the heat of the heat storage body. The gas after absorbing the heat is transported to the heat exchanger through the pipeline to exchange heat with the water on the cold side of the heat exchanger. The heated water can enter the heat user for use. At this time, the gas enters the fan again after the heat is absorbed, so as to enter the heat storage space for circulation again through the blowing of the fan, and the gas cylinder can pressurize the inside of the heat storage system. When the gas pressurized to a preset pressure exchanges heat with the heat storage body through the heat storage space, the heat release rate of the heat storage material in the heat storage body can be increased. At the same time, the gas cylinder can also maintain a certain pressure inside the heat storage system. In this way, the overall heat release efficiency of the heat storage system can be improved, and the rapid cooling of the heat storage system can be achieved.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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:

[0018] Figure 1 is a schematic diagram of a heat storage system provided in an exemplary embodiment of the present disclosure;

[0019] Figure 2 is a cross-sectional view of a heat storage body provided in an exemplary embodiment of the present disclosure;

[0020] Figure 3 yes Figure 2 A local enlarged view of point A;

[0021] Figure 4 is a side view of a heating element provided in an exemplary embodiment of the present disclosure;

[0022] Figure 5 is a side view of another example of a heating element provided in an exemplary embodiment of the present disclosure;

[0023] Figure 6 is a front view of another example of a heating element provided in an exemplary embodiment of the present disclosure;

[0024] Figure 7 is a comparative curve diagram of heating efficiency of heating elements of various structures provided in an exemplary embodiment of the present disclosure;

[0025] Figure 8 is a graph showing the change in convection heat coefficient of a gas as a function of pressure provided in an exemplary embodiment of the present disclosure.

[0026] Description of Reference Numerals

[0027] 1-heat storage device; 101-heat storage space; 102-air inlet; 103-air outlet; 104-first branch; 105-second branch; 106-temperature sensor; 107-pressure sensor; 108-flow meter; 109-safety valve; 110-heat storage body; 111-first heat storage part; 112-second heat storage part; 120-heating element; 121-support; 122-installation groove; 123-heating wire; 124-opening; 130-gas distributor; 140-insulation layer; 141-insulation material; 150-pressure regulating valve; 2-heat exchanger; 3-fan; 4-preheater; 5-temperature measuring device; 6-gas cylinder. DETAILED DESCRIPTION

[0028] 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.

[0029] In the present disclosure, unless otherwise specified, directional words such as "inside" and "outside" refer to the inside and outside relative to the outline of the component or structure itself, and "first" and "second" are used to distinguish one element from another and have no order or importance. In addition, the same figure marks in different reference drawings represent the same elements.

[0030] In the present disclosure, an XYZ coordinate system is established for the heat storage device 1, referring to Figure 1 and Figure 2 As shown, among which, Figure 1 The direction of the X arrow is the first direction, that is, Figure 2 The direction extending inward from the drawing is the first direction, the direction of the Y arrow is the second direction, and the direction of the Z arrow is the third direction, ie, the vertical direction. The first direction, the second direction and the third direction are perpendicular to each other.

[0031] The inventors have discovered through research that, in the relevant technologies, most of the current traditional solid heat storage devices are normal pressure type or near normal pressure type devices. The gas pressure inside the device is at normal pressure during the heat storage process, and the heat transfer efficiency and heat transfer speed of the traditional closed heat storage unit structure are low, which leads to slow heating and cooling of the heat storage device and easy overflow of high-temperature gas.

[0032] Based on this, the present disclosure provides a heat storage system, referring to Figures 1 to 8As shown, the heat storage system includes a heat storage device 1, a heat exchanger 2, a fan 3 and a gas cylinder 6. The heat storage device 1 includes a heat storage space 101 and an air inlet 102 and an air outlet 103 connected to the heat storage space 101. The heat storage space 101 is provided with a heat storage body 110 for storing and releasing heat and a heating element 120 capable of heating the heat storage body 110; the heat exchanger 2 pipeline is connected to the air inlet 102 and the air outlet 103, the fan 3 is arranged on the pipeline between the heat exchanger 2 and the air inlet 102, and is used to input the gas after heat exchange by the heat exchanger 2 from the air inlet 102 into the heat storage space 101; the gas cylinder 6 is arranged on the pipeline between the fan 3 and the air inlet 102, and is used to pressurize the gas filled in the heat storage system. Through this arrangement, the heating element 120 inside the heat storage device 1 can heat the heat storage body 110, and the heat storage body After the body 110 is heated to a preset temperature, the gas is filled into the internal pipeline of the heat storage system through the gas cylinder 6 to pressurize it, and the fan 3 is turned on to transport the normal temperature gas to the heat storage space 101 through the air inlet 102 to absorb the heat of the heat storage body 110. The gas after absorbing the heat is transported to the heat exchanger 2 through the pipeline to exchange heat with the water on the cold side of the heat exchanger 2. After heating, the water on the cold side can enter the heat user for use. At this time, the gas enters the fan 3 again after the heat is absorbed, and enters the heat storage space 101 again through the blowing of the fan 3 for circulation. When the pressurized gas exchanges heat with the heat storage body 110 through the heat storage space 101, the heat release rate of the heat storage material in the heat storage body 110 can be increased. The gas cylinder 6 can also maintain a certain pressure inside the heat storage system. In this way, the overall heat release efficiency of the heat storage system can be improved, and the rapid cooling of the heat storage system can be achieved. In addition, the present disclosure does not limit the type of material for the heat storage body 110, but requires that the thermal conductivity of the material is ≥30W / (mK).

[0033] In some preferred embodiments, the fan 3 may be a centrifugal fan with a boosting function, which is not limited in the present disclosure.

[0034] In some embodiments, reference Figure 1 As shown, the gas can be an inert gas; the preset pressure in the heat storage system is 0.6 to 1 MPa. In this way, the chemical properties of the inert gas are relatively stable and it is not easy to react chemically with other substances or metals in the heat storage system. In this way, the number of cycles of the gas in the heat storage system and the service life of the heat storage system can be increased. The preset pressure is set to a range greater than the atmospheric pressure, for example, 0.6 to 1.0 MPa, which is 6 to 10 times the normal pressure. The pressure in the heat storage system can be pressurized to 0.6 to 1.0 MPa through the gas cylinder 6, and then the pressurized gas inside the heat storage system is circulated through the fan 3. It has been verified through relevant experiments that the heat release rate of the heat storage material in the heat storage body 110 can be significantly improved.

[0035] After relevant experimental verification, reference Figure 8 As shown, the horizontal axis is the pressure value of the gas, and the vertical axis is the convective heat transfer coefficient of the gas. The convective heat transfer coefficient of the gas will increase with the increase of pressure. The larger the convective heat transfer coefficient, the faster the gas can drive the heat storage material to release heat. Setting the preset pressure between 0.6 and 1.0 MPa can not only increase the heat release rate of the heat storage material, but also avoid the dangerous situation of cylinder explosion inside the heat storage system due to excessive pressure.

[0036] In some embodiments, reference Figures 2 to 4 As shown, the heat storage body 110 includes a first heat storage part 111 and a second heat storage part 112 alternately arranged in the vertical direction of the heat storage space 101, wherein the heating element 120 is provided in the second heat storage part 112. Through this arrangement, the alternately arranged first heat storage part 111 and the second heat storage part 112 can maximize the use of the heat storage space 101, and the first heat storage part 111 and the second heat storage part 112 are alternately arranged, and the heating element 120 provided in the second heat storage part 112 can heat the first heat storage part 111 and the second heat storage part 112 at the same time, which can achieve a better heat storage effect.

[0037] In some embodiments, reference Figures 2 to 4 As shown, the first heat storage part 111 is constructed as a plate-shaped heat storage body, and the second heat storage part 112 is constructed as a plurality of strip-shaped heat storage bodies, which extend along a first direction and are arranged between two adjacent plate-shaped heat storage bodies at intervals along a second direction perpendicular to the first direction. In the second direction, a heating element 120 is provided between any two adjacent strip-shaped heat storage bodies. By this arrangement, Figure 2 As shown, multiple plate-shaped heat storage bodies and multiple strip-shaped heat storage bodies can jointly absorb the heat generated by the heating element 120, thereby improving the heat storage and release rate of the heat storage body 110. The multiple heating elements 120 can store heat for the plate-shaped heat storage bodies and the strip-shaped heat storage bodies at the same time, thereby improving the heat storage efficiency of the plate-shaped heat storage bodies and the strip-shaped heat storage bodies.

[0038] In some embodiments, reference Figures 2 to 4 As shown, the heating element 120 includes a support member 121, including a mounting groove 122 extending along a first direction, the support member 121 is disposed between two adjacent strip-shaped heat storage bodies; and a heating wire 123, at least partially disposed in the mounting groove 122 of the support member 121. With this arrangement, the mounting groove 122 in the support member 121 can accommodate the heating wire 123, and the support member 121 is adjacent to the two strip-shaped heat storage bodies and can well provide heat for the strip-shaped heat storage bodies.

[0039] In addition, in some preferred embodiments, the heating wire may be a metal heating wire made of a material with a relatively high resistivity, such as an iron-chromium-aluminum alloy or a nickel-chromium wire, etc., which is not limited in the present disclosure.

[0040] In some preferred embodiments, reference Figure 4 As shown, the heating wire can be extended in a spiral along the extension direction of the mounting groove 122, so that a better heating effect can be provided for the strip-shaped heat storage body.

[0041] In some embodiments, reference Figure 2 and Figure 3 As shown, openings 124 are formed at both ends of the mounting groove 122 , and the two openings 124 are respectively connected to the air inlet 102 and the air outlet 103 ; a gas distributor 130 connected to the air inlet 102 and the plurality of openings 124 is provided in the heat storage device 1 . Through this arrangement, the opening 124 can allow the gas entering from the air inlet 102 to enter the installation groove 122 and then be discharged through the air outlet 103. Under this arrangement, the gas entering the installation groove 122 can better absorb the heat of the first heat storage part 111 and the second heat storage part 112 to improve the efficiency of heat exchange. The input end of the gas distributor 130 is connected to the air inlet 102, and the output end is connected to the multiple openings 124 one by one. In this way, before the gas enters the heat storage space 101 through the air inlet 102, the gas will first be evenly blown to each opening 124 through the gas distributor 130 to improve the uniformity of the gas entering the multiple installation grooves 122, and can better absorb the heat of the first heat storage part 111 and the second heat storage part 112.

[0042] In some embodiments, reference Figure 2 and Figure 3 As shown, the mounting groove 122 is constructed as a U-shaped groove, the bottom wall of the U-shaped groove is attached to the first heat storage part 111, and the two opposite side walls of the U-shaped groove are attached to the second heat storage part 112. Through this arrangement, the spacing distance between the U-shaped groove and the first heat storage part 111 and the second heat storage part 112 can be reduced, and the heat generated by the heating wire 123 can be transferred to the first heat storage part 111 and the second heat storage part 112 more quickly, which can improve the heat storage efficiency of the heat storage system.

[0043] In other embodiments, reference Figure 5 and Figure 6 As shown, the mounting groove 122 can also be configured as follows Figure 6 As shown in the mouth-shaped groove, a plurality of the mouth-shaped grooves are arranged at intervals along the extension direction of the support member 121, and the heating wire 123 is partially in contact with the bottom wall of the mouth-shaped groove. Heat can be transferred to the first heat storage part 111 and the second heat storage part 112 through the gap between any two adjacent mouth-shaped grooves to complete the heat storage of the first heat storage part 111 and the second heat storage part 112, which can also improve the heat storage efficiency of the heat storage system, which is not limited in the present disclosure.

[0044] After relevant experimental verification, reference Figure 7As shown, the installation slot structure corresponding to model 1 is a traditional fully sealed installation slot, the installation slot structure corresponding to model 2 is a mouth-shaped installation slot, and the installation slot structure corresponding to model 3 is a U-shaped installation slot. The horizontal axis is time, and the vertical axis is the average temperature of the heat storage body 110. The slope of the curve represents the heat storage speed of the installation slots with different structures, as shown in FIG. Figure 7 As shown, when a fully sealed installation groove is used for heat storage, the heat storage efficiency is the slowest, when a mouth-shaped installation groove is used for heat storage, the heat storage efficiency is higher, and when a U-shaped installation groove is used for heat storage, the heat storage efficiency is the highest.

[0045] In some embodiments, reference Figure 2 and Figure 3 As shown, the thickness of the second heat storage part 112 in the vertical direction is greater than the extension height of the U-shaped groove side wall in the vertical direction. With this arrangement, the first heat storage part 111 and the second heat storage part 112 are arranged at a height interval along the third direction, and the thickness of the second heat storage part 112 is higher than the height of the U-shaped groove side wall, which can prevent the first heat storage part 111 on the upper layer of the second heat storage part 112 from compressing the spirally extended heating wire 123. At the same time, a certain space can be left between the heating wire 123 and the first heat storage part 111, which can prevent the heating wire 123 from directly abutting against the first heat storage part 111 and causing local overheating of the first heat storage part 111.

[0046] In some embodiments, reference Figure 2 and Figure 3 As shown, the heat storage device 1 further includes a heat preservation layer 140; the heat preservation layer 140 is arranged between the heat storage space 101 and the outer wall of the heat storage device 1, and a heat preservation material 141 is arranged in the heat preservation layer 140. In this way, the heat preservation material 141 in the heat preservation layer 140 can prevent the heat of the heat storage device 1 from being lost to the outside and prevent the gas from being dissipated to the outside, thereby indirectly improving the heat storage efficiency of the heat storage system. In addition, referring to Figure 2 and Figure 3 As shown, the insulation layer 140 can be provided in multiple layers between the heat storage space 101 and the outer wall of the heat storage device 1 to improve the insulation effect of the heat storage space 101. At the same time, the present disclosure does not limit the material used for the insulation material 141. For example, the insulation material 141 can be one or a combination of materials such as aluminum silicate, aerogel, and calcium silicate.

[0047] In some embodiments, reference Figure 1As shown, the heat storage system further includes a first branch 104 and a second branch 105 which are arranged between the heat exchanger 2 and the fan 3 and are connected in parallel to each other. The first branch 104 is provided with a preheater 4, and the outlet end of the heat exchanger is provided with a temperature measuring device 5. Through this arrangement, the temperature measuring device 5 can measure the temperature of the gas discharged through the heat exchanger 2, and can also send an opening and closing signal to the stop valve on the first branch 104 and / or the second branch 105 through the sensor inside thereof according to the temperature of the gas, so as to control the opening or closing of the stop valve on the first branch 104 and / or the second branch 105, refer to Figure 1 As shown, the first branch 104 and the second branch 105 are respectively provided with a stop valve. When the temperature of the gas discharged from the heat exchanger 2 is higher than 250°C, the temperature measuring device 5 can control the stop valve on the first branch 104 to open, and the stop valve on the second branch 105 to close. At this time, the gas passes through the preheater 4, and the cold water in the preheater 4 is preheated to achieve the cooling of the gas. After the cooled gas is lower than 250°C, it can enter the fan 3 again for circulation; when the temperature of the gas discharged from the heat exchanger 2 is lower than 250°C, the temperature measuring device 5 can control the stop valve on the first branch 104 to close, and the stop valve on the second branch 105 to open. The gas directly passes through the second branch 105 and enters the fan 3 again for circulation. In this way, the safety hazard of overheating of the fan 3 intake air caused by excessive gas temperature can be reduced, and the energy utilization efficiency of the heat storage system can also be improved.

[0048] In a preferred embodiment of the present disclosure, the preheater 4 can adopt any type of preheater such as a shell and tube preheater or a plate preheater, and the heat exchanger can adopt any type of heat exchanger such as a direct contact heat exchanger, an energy storage heat exchanger or a partition heat exchanger, and the present disclosure does not limit this.

[0049] In addition, the temperature measuring device 5 provided in the present disclosure can adopt any form of temperature measuring device. For example, a temperature sensor electrically connected to the stop valve can be adopted. The probe of the temperature sensor can contact the gas to receive a signal whether the temperature of the gas is higher than 250°C. The stop valve can adopt an electric valve electrically connected to the temperature sensor. When a signal is received that the gas temperature is higher than or equal to 250°C, the electric valve on the first branch 104 is energized to open, and the electric valve on the second branch 105 is closed. When a signal is received that the gas temperature is lower than 250°C, the electric valve on the second branch 105 is energized to open, and the electric valve on the first branch 104 is closed. The present disclosure does not limit this.

[0050] In some embodiments, reference Figure 1As shown, the heat storage device 1 also includes a temperature sensor 106, a pressure sensor 107, a flow meter 108 and a safety valve 109. The temperature sensor 106 is arranged at the air inlet 102 and the air outlet 103, the pressure sensor 107 is arranged at the top of the heat storage device 1, the flow meter 108 is arranged at the air inlet 102 and the air outlet 103, and the safety valve 109 is arranged at the top of the heat storage device 1. Through this arrangement, the temperature sensor 106 can measure the temperature of the gas at the air inlet 102 and the air outlet 103, so that the staff can monitor the temperature of the heat storage body 110 in real time. The pressure sensor 107 can facilitate the staff to monitor the pressure inside the heat storage device 1 in real time to prevent the heat storage device 1 from exploding due to excessive pressure. When the internal pressure of the heat storage device 1 is too high, the system interlock protection automatically opens the safety valve 109 to release the excessive pressure inside the heat storage system for emergency avoidance, thereby improving the safety of the heat storage system.

[0051] In some preferred embodiments of the present disclosure, a pressure regulating valve 150 is further provided on the heat storage device 1, so that the staff can adjust the pressure inside the heat storage device 1 through the pressure regulating valve 150 to improve the heat release efficiency of the heat storage system.

[0052] The present disclosure exemplarily describes the working process of the heat storage system, which may include the following steps:

[0053] Heat storage process: Before heating, the inert gas bottle group is used to replace the air in the system, and the heating element 120 inside the heat storage device 1 is heated by power supply. The heat generated by the heating element 120 will be transferred to the first heat storage part 111 and the second heat storage part 112. When the temperature value displayed by the temperature sensor 106 observed by the control system reaches the preset temperature, the system automatically turns off the power supply and stops heating the heating element 120, and the heat storage process is completed.

[0054] Heat release process: When the first heat storage part 111 and the second heat storage part 112 are heated to a preset temperature, the heat storage system is filled with inert gas through the gas cylinder 6, and after the internal pressure of the heat storage system is increased to a preset pressure, the fan 3 is turned on, and the fan 3 will circulate the gas inside the pipeline of the heat storage system. The gas in the heat storage device 1 will enter the pipeline through the gas outlet 103. The gas in the pipeline first passes through the heat exchanger 2 to exchange heat with the water on the cold side of the heat exchanger 2, and the water on the cold side is heated to high-temperature water or high-temperature steam. At this time, the gas temperature is reduced, and the gas will be detected by the temperature measuring device after passing through the temperature measuring device. If the temperature of the gas is lower than 250 ℃, the temperature measuring device can control the stop valve on the second branch 105 to open, and the stop valve on the first branch 104 to close, and the gas directly enters the fan 3 again through the second branch 105 for the next cycle; if the temperature of the gas is higher than 250℃, the temperature measuring device controls the stop valve on the first branch 104 to open, and the stop valve on the second branch 105 to close, and the gas will enter the preheater 4 to preheat the cold water in the preheater 4 and perform heat exchange again, and the cooled gas enters the fan 3 again for the next cycle, and the heat release process is completed at this time, and the heated water in the heat exchanger can be circulated into the heat user through an external water pump.

[0055] 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.

[0056] 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.

[0057] 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: A heat storage device, comprising a heat storage space and an air inlet and an air outlet communicated with the heat storage space, wherein a heat storage body for storing and releasing heat and a heating element capable of heating the heat storage body are provided in the heat storage space; a heat exchanger, wherein a pipeline is connected to the air inlet and the air outlet; A fan, arranged on the pipeline between the heat exchanger and the air inlet, for inputting the gas after heat exchange by the heat exchanger into the heat storage space through the air inlet; as well as A gas cylinder is arranged on the pipeline between the fan and the air inlet, and is used to pressurize the gas filled into the heat storage system.

2. The heat storage system according to claim 1, characterized in that: The gas is an inert gas; The preset pressure in the heat storage system is 0.6-1 MPa.

3. The heat storage system according to claim 1, characterized in that: The heat storage body comprises a first heat storage part and a second heat storage part which are alternately arranged along a vertical direction of the heat storage space, wherein the heating element is provided in the second heat storage part.

4. The heat storage system according to claim 3, characterized in that: The first heat storage portion is configured as a plate-shaped heat storage body, and the second heat storage portion is configured as a plurality of strip-shaped heat storage bodies, wherein the plurality of strip-shaped heat storage bodies extend along a first direction and are arranged between two adjacent plate-shaped heat storage bodies at intervals along a second direction perpendicular to the first direction, and wherein one heating element is provided between any two adjacent strip-shaped heat storage bodies along the second direction.

5. The heat storage system according to claim 4, characterized in that: The heating element comprises: A support member, comprising a mounting groove extending along the first direction, wherein the support member is disposed between two adjacent strip-shaped heat storage bodies; and The heating wire is at least partially disposed in the mounting groove of the support member.

6. The heat storage system according to claim 5, characterized in that: Openings are formed at both ends of the mounting groove, and the two openings are respectively connected to the air inlet and the air outlet; A gas distributor communicating with the air inlet and the plurality of openings is provided in the heat storage device.

7. The heat storage system according to claim 5, characterized in that: The mounting groove is configured as a U-shaped groove, the bottom wall of the U-shaped groove is in contact with the first heat storage portion, and the two opposite side walls of the U-shaped groove are in contact with the second heat storage portion.

8. The heat storage system according to claim 7, characterized in that: The thickness of the second heat storage portion along the vertical direction is greater than the extension height of the side wall of the U-shaped groove along the vertical direction.

9. The heat storage system according to claim 3, characterized in that: The heat storage device also includes a heat preservation layer; The heat-insulating layer is arranged between the heat storage space and the outer wall of the heat storage device, and a heat-insulating material is arranged in the heat-insulating layer.

10. The heat storage system according to claim 1, characterized in that: The heat storage system further includes a first branch and a second branch which are arranged between the heat exchanger and the fan and are connected in parallel with each other. A preheater is arranged on the first branch, and a temperature measuring device is arranged at the outlet end of the heat exchanger.

11. The heat storage system according to claim 10, characterized in that: The heat storage device also includes: Temperature sensors, arranged at the air inlet and the air outlet; A pressure sensor is arranged on the top of the heat storage device; a flow meter, disposed at the air inlet and the air outlet; and A safety valve is arranged on the top of the heat storage device.

Images