Four-channel solid heat storage unit structure
The four-pathway solid heat storage unit structure addresses temperature non-uniformity in existing systems by alternating airflow paths, enhancing energy density and reducing overheating risks.
Patent Information
- Application Number
- CN202421672606.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-07-16
AI Technical Summary
In the existing solid heat storage systems, both unidirectional circulation and bidirectional circulation methods have problems of low temperature areas and uneven temperatures, resulting in a decrease in energy storage density.
The four-pass solid heat storage unit structure is adopted. By setting up multiple air chambers and air ducts in the insulation structure, and the alternating operation of high-temperature air valves and low-temperature air ducts is used to realize the alternating circulation of four paths to ensure temperature uniformity.
It effectively avoids local temperature excessively, reduces damage to the electric heating element, increases the effective heat storage capacity of the heat storage unit, and reduces the quality and volume of the equipment.
Smart Images
Figure CN223106761U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of solid heat storage, in particular to a four-channel solid heat storage unit structure. Background Art
[0002] A solid heat storage system is an energy storage technology mostly used in industrial and commercial fields. It converts electrical energy into heat energy and stores it in a solid medium when the electricity price is low or the renewable energy generation is high, and then releases this heat energy for use when needed. This system is particularly suitable for smoothing electricity demand, load shifting, and the integration of renewable energy. Existing solid heat storage systems mostly adopt two gas circulation modes: unidirectional circulation and bidirectional circulation. In unidirectional circulation, gas flows from one side of the solid heat storage body to the other side after being heated and raised in temperature, which will result in a low-temperature area in the direction where the gas enters the heat storage body, reducing the energy storage density of the solid heat storage system; in bidirectional circulation, the direction of the gas entering the solid heat storage body can be changed, but there is still the problem of a low-temperature area, and the problem of uneven temperature still exists. Content of the Utility Model
[0003] The purpose of the utility model is to provide a four-channel solid heat storage unit structure to solve the problems in the above-mentioned background art that existing solid heat storage systems mostly adopt two gas circulation modes: unidirectional circulation and bidirectional circulation. In unidirectional circulation, gas flows from one side of the solid heat storage body to the other side after being heated and raised in temperature, which will result in a low-temperature area in the direction where the gas enters the heat storage body, reducing the energy storage density of the solid heat storage system; in bidirectional circulation, the direction of the gas entering the solid heat storage body can be changed, but there is still the problem of a low-temperature area, and the problem of uneven temperature still exists.
[0004] To achieve the above purpose, the utility model provides the following technical solution: A four-channel solid heat storage unit structure includes a heat insulation structure. In the middle position inside the heat insulation structure, there is a heat storage unit. Between the heat storage units, there are electric heating elements. On one side inside the heat insulation structure, there is a first air chamber. Inside the heat insulation structure and on one side of the heat storage unit, there is a second air chamber. The first air chamber is separated from the second air chamber by the heat insulation structure. On the other side inside the heat insulation structure, there is a third air chamber. Inside the heat insulation structure and on the other side of the heat storage unit, there is a fourth air chamber. The third air chamber is separated from the fourth air chamber by the heat insulation structure. On one side outside the heat insulation structure, there is a heat circulation blower. A low-temperature air duct is connected in communication between the heat circulation blower and the heat insulation structure. On the other side outside the heat insulation structure, there is a heat exchange component. A high-temperature air duct is connected in communication between the heat exchange component and the heat insulation structure.
[0005] Preferably, a first high-temperature air valve is provided between the low-temperature air duct and the first air chamber, a second high-temperature air valve is provided between the low-temperature air duct and the second air chamber, a fourth high-temperature air valve is provided between the low-temperature air duct and the third air chamber, and a third high-temperature air valve is provided between the low-temperature air duct and the fourth air chamber.
[0006] Preferably, a ninth high-temperature air valve is provided between the high-temperature air duct and the first air chamber, and a tenth high-temperature air valve is provided between the high-temperature air duct and the second air chamber.
[0007] Preferably, a fifth high-temperature air valve and a seventh high-temperature air valve are respectively provided at both ends between the first air chamber and the second air chamber, and a sixth high-temperature air valve and an eighth high-temperature air valve are respectively provided at both ends between the third air chamber and the fourth air chamber.
[0008] Preferably, a return air duct is connected in communication between the heat exchange assembly and the thermal circulation fan.
[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows: on the basis of the existing gas circulation modes of single-way circulation or two-way circulation in solid heat storage systems, four paths can be alternately operated during operation to achieve uniform temperature of the entire heat storage unit, effectively avoiding local overheating. After reheating after a cycle of circulation is completed, temperature accumulation can be avoided, damage to the electric heating elements can be reduced, and at the same time, the effective heat storage capacity of the heat storage unit can be increased. In this way, the mass of the heat storage unit can be reduced in the design, and the equipment volume can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 is a schematic diagram of the main structure of the present utility model;
[0011] Figure 2 is a schematic diagram of the path 1 of the main structure of the present utility model;
[0012] Figure 3 is a schematic diagram of the path 2 of the main structure of the present utility model;
[0013] Figure 4 is a schematic diagram of the path 3 of the structure of the present utility model;
[0014] Figure 5 is a schematic diagram of the path 4 of the structure of the present utility model.
[0015] In the figure: 1 - thermal circulation fan, 2 - low-temperature air duct, 3 - first high-temperature air valve, 4 - second high-temperature air valve, 5 - heat preservation structure, 6 - fifth high-temperature air valve, 7 - electric heating element, 8 - heat storage unit, 9 - first air chamber, 10 - second air chamber, 11 - seventh high-temperature air valve, 12 - ninth high-temperature air valve, 13 - high-temperature air duct, 14 - heat exchange component, 15 - return air duct, 16 - tenth high-temperature air valve, 17 - eighth high-temperature air valve, 18 - third air chamber, 19 - fourth air chamber, 20 - sixth high-temperature air valve, 21 - fourth high-temperature air valve, 22 - third high-temperature air valve. Specific implementation manner
[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0017] Please refer to Figures 1-5 , the present invention provides a four-way solid heat storage unit structure, including a heat preservation structure 5. An intermediate position inside the heat preservation structure 5 is provided with a heat storage unit 8. An electric heating element 7 is arranged between the heat storage units 8. A first air chamber 9 is provided on one side inside the heat preservation structure 5. A second air chamber 10 is provided on one side of the heat storage unit 8 inside the heat preservation structure 5. The first air chamber 9 is separated from the second air chamber 10 by the heat preservation structure. A third air chamber 18 is provided on the other side inside the heat preservation structure 5. A fourth air chamber 19 is provided on the other side of the heat storage unit 8 inside the heat preservation structure 5. The third air chamber 18 is separated from the fourth air chamber 19 by the heat preservation structure 5. A thermal circulation fan 1 is provided on one side outside the heat preservation structure 5. A low-temperature air duct 2 is connected in communication between the thermal circulation fan 1 and the heat preservation structure 5. A heat exchange component 14 is provided on the other side outside the heat preservation structure 5. A high-temperature air duct 13 is connected in communication between the heat exchange component 14 and the heat preservation structure 5.
[0018] In use, during the low-cost off-peak period, the heat storage unit 8 is heated by the electric heating element 7, and the electric energy is converted into heat energy and stored in the heat storage unit 8. The heat storage unit 8 is composed of materials with high specific heat and thermal conductivity such as magnesia bricks and high-aluminum bricks, and is made into brick form. The bricks are processed into male and female groove forms to facilitate installation and positioning and ensure that the cross-sectional dimensions of the brick holes are the same. Moreover, the two vertical surfaces forming the brick holes are processed into curved surface forms to increase the disturbance when air flows in the brick holes, change the flow pattern, increase the Reynolds number and the heat transfer area, which is beneficial to heat exchange. And a heat insulation structure 5 is arranged outside the heat storage unit 8 to prevent heat loss. When there is a useful heat demand, the heat circulation fan 1 is started, and cold air is blown into the interior of the heat insulation structure 5 through the low-temperature air duct 2. The cold air is heated by the heat storage unit 8 itself, and the high-temperature gas is blown into the heat exchange component 14 through the high-temperature air duct 13. The heat is converted into the temperature of other media and transported out through the heat exchange component 14. By arranging a first air chamber 9, a second air chamber 10, a third air chamber 18 and a fourth air chamber 19 inside the heat insulation structure 5, and controlling the opening and closing of the corresponding valves of the first air chamber 9, the second air chamber 10, the third air chamber 18 and the fourth air chamber 19, four air flow paths are formed to control the flow direction of the cold air.
[0019] A first high-temperature air valve 3 is provided between the low-temperature air duct 2 and the first air chamber 9, a second high-temperature air valve 4 is provided between the low-temperature air duct 2 and the second air chamber 10, a fourth high-temperature air valve 21 is provided between the low-temperature air duct 2 and the third air chamber 18, and a third high-temperature air valve 22 is provided between the low-temperature air duct 2 and the fourth air chamber 19.
[0020] A ninth high-temperature air valve 12 is provided between the high-temperature air duct 13 and the first air chamber 9, and a tenth high-temperature air valve 16 is provided between the high-temperature air duct 13 and the second air chamber 10.
[0021] A fifth high-temperature air valve 6 and a seventh high-temperature air valve 11 are respectively provided at both ends between the first air chamber 9 and the second air chamber 10, and a sixth high-temperature air valve 20 and an eighth high-temperature air valve 17 are respectively provided at both ends between the third air chamber 18 and the fourth air chamber 19.
[0022] A return air duct 15 is connected in communication between the heat exchange component 14 and the heat circulation fan 1. The air that has completed heat exchange through the heat exchange component 14 is blown back to the heat circulation fan 1 through the return air duct 15.
[0023] As Figure 1 , for the flow direction schematic of path 1, the low-temperature air is pressurized by the heat circulation fan 1 and enters the second air chamber 10 through the second high-temperature air valve 4, and then exchanges heat through the heat storage unit 8 to make the air temperature rise to form high-temperature air. The high-temperature air is mixed in the fourth air chamber 19 and then enters the heat exchange component 14 through the eighth high-temperature air valve 17, the tenth high-temperature air valve 16 and the high-temperature air duct 13;
[0024] As Figure 2 , it is a schematic diagram of the flow direction of Path 2. After the low-temperature air is pressurized by the thermal circulation fan 1, it enters the fourth air chamber 19 through the third high-temperature air valve 22, and then exchanges heat through the regenerative unit 8 to heat the air to form high-temperature air. After the high-temperature air is mixed in the second air chamber 10, it enters the heat exchange assembly 14 through the seventh high-temperature air valve 11, the ninth high-temperature air valve 12, and the high-temperature air duct 13;
[0025] As Figure 3 , it is a schematic diagram of the flow direction of Path 3. After the low-temperature air is pressurized by the circulation fan 1, it passes through the first high-temperature air valve 3, the first air chamber 9, and the seventh high-temperature air valve 11 in sequence, enters the second air chamber 10, and then exchanges heat through the regenerative unit 8 to heat the air to form high-temperature air. After the high-temperature air is mixed in the fourth air chamber 19, it then passes through the sixth high-temperature air valve 20, the third air chamber 18, the tenth high-temperature air valve 16, and the high-temperature air duct in sequence to enter the heat exchange assembly 14;
[0026] As Figure 4 , it is a schematic diagram of the flow direction of Path 4. After the low-temperature air is pressurized by the thermal circulation fan 1, it passes through the fourth high-temperature air valve 21, the third air chamber 18, and the eighth high-temperature air valve 17 in sequence to enter the fourth air chamber, and then exchanges heat through the regenerative unit 8 to heat the air to form high-temperature air. After the high-temperature air is mixed in the second air chamber 10, it then passes through the fifth high-temperature air valve 6, the first air chamber 9, the ninth high-temperature air valve 12, and the high-temperature air duct in sequence to enter the heat exchange assembly 14.
[0027] During operation, the on-off states of the high-temperature air valves can be automatically controlled to form the above 4 paths: Path 1 and Path 2, Path 3 and Path 4 can achieve temperature uniformity of the regenerative unit along the brick hole direction; Path 1 and Path 4, Path 2 and Path 3 can achieve temperature uniformity of the regenerative unit in the side-by-side direction of the brick holes; Path 1 and Path 4, Path 2 and Path 3 can achieve temperature uniformity of the regenerative unit both in the brick hole direction and in the side-by-side direction of the brick holes.
[0028] When circulating in Path 1, if the temperature of the first air chamber 9 is too high, the first high-temperature air valve 3 and the seventh high-temperature air valve 11 can be opened at a small angle to allow the hot air in the first air chamber 9 to enter the second air chamber 10, reduce the temperature of the first air chamber 9, and reduce the temperature difference from the outside. Similarly, the fourth high-temperature air valve 21 can be opened at a small angle to reduce the temperature of the third air chamber 18; when circulating in Path 2, if the temperature of the third air chamber 18 is too high, the fourth high-temperature air valve 21 and the eighth high-temperature air valve 17 can be opened at a small angle to allow the hot air in the third air chamber 18 to enter the fourth air chamber 19, reduce the temperature of the third air chamber 18, and reduce the temperature difference from the outside. Similarly, the first high-temperature air valve 1 can be opened at a small angle to reduce the temperature of the first air chamber 9; the circulation of Path 3 and Path 4 itself passes through the first air chamber 9 and the third air chamber 18, which is beneficial to the heat preservation effect.
[0029] Adjust the air temperature entering the heat exchange unit: When the temperature of the high-temperature air is too high, Path 1 can adjust the opening angle of the fourth high-temperature air valve 21 to allow the low-temperature air to enter the third air chamber 18 and then mix with the high-temperature air to reduce the temperature of the high-temperature air and protect the heat exchange components; Path 2 can adjust the opening angle of the first high-temperature air valve 3 to allow the low-temperature air to enter the first air chamber 9 and then mix with the high-temperature air to reduce the temperature of the high-temperature air and protect the heat exchange components; Path 3 can adjust the opening angle of the fourth high-temperature air valve 21 to allow the low-temperature air to enter the third air chamber 18 and mix with the high-temperature air to reduce the temperature of the high-temperature air and protect the heat exchange components; Path 4 can adjust the opening angle of the first high-temperature air valve 3 to allow the low-temperature air to enter the first air chamber 9 and mix with the high-temperature air to reduce the temperature of the high-temperature air and protect the heat exchange components
[0030] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A four-channel solid heat storage unit structure, characterized in that: It includes a heat insulation structure (5). At the middle position inside the heat insulation structure (5), there is a heat storage unit (8). Between the heat storage units (8), there is an electric heating element (7). On one side inside the heat insulation structure (5), there is a first air chamber (9). Inside the heat insulation structure (5) and on one side of the heat storage unit (8), there is a second air chamber (10). The first air chamber (9) is spaced from the second air chamber (10) through the heat insulation structure. On the other side inside the heat insulation structure (5), there is a third air chamber (18). Inside the heat insulation structure (5) and on the other side of the heat storage unit (8), there is a fourth air chamber (19). The third air chamber (18) is spaced from the fourth air chamber (19) through the heat insulation structure (5). On one side outside the heat insulation structure (5), there is a heat circulation fan (1). Between the heat circulation fan (1) and the heat insulation structure (5), there is a low-temperature air duct (2) connected in communication. On the other side outside the heat insulation structure (5), there is a heat exchange component (14). Between the heat exchange component (14) and the heat insulation structure (5), there is a high-temperature air duct (13) connected in communication.
2. The structure of a four - path solid heat storage unit according to claim 1, wherein: Between the low-temperature air duct (2) and the first air chamber (9), there is a first high-temperature air valve (3). Between the low-temperature air duct (2) and the second air chamber (10), there is a second high-temperature air valve (4). Between the low-temperature air duct (2) and the third air chamber (18), there is a fourth high-temperature air valve (21). Between the low-temperature air duct (2) and the fourth air chamber (19), there is a third high-temperature air valve (22).
3. A four-channel solid heat storage unit structure according to claim 1, characterized in that: Between the high-temperature air duct (13) and the first air chamber (9), there is a ninth high-temperature air valve (12). Between the high-temperature air duct (13) and the second air chamber (10), there is a tenth high-temperature air valve (16).
4. A four-channel solid heat storage unit structure according to claim 1, characterized in that: At both ends between the first air chamber (9) and the second air chamber (10), there are a fifth high-temperature air valve (6) and a seventh high-temperature air valve (11) respectively. At both ends between the third air chamber (18) and the fourth air chamber (19), there are a sixth high-temperature air valve (20) and an eighth high-temperature air valve (17) respectively.
5. A four-channel solid heat storage unit structure according to claim 1, characterized in that: Between the heat exchange component (14) and the heat circulation fan (1), there is a return air duct (15) connected in communication.