A high-efficiency heat storage and release device and working method

Abstract

The present invention discloses a highly efficient heat storage and release device and a working method, the device comprises a heat storage device, a fan, a fan support, a circulating air duct, a second pressure sensor, a flow sensor, and a second temperature sensor, the heat storage device comprises a heat storage device outlet, a first pressure sensor, a first temperature sensor, a heat storage device inlet, a heat storage component, a heat exchanger component and a temperature sensing module thereof; the heat storage device outlet is connected to the fan inlet, the fan is fixed on the fan support, the fan outlet is connected to the circulating air duct inlet, the circulating air duct outlet is connected to the heat storage device inlet; the second pressure sensor, the flow sensor, and the second temperature sensor are installed on the circulating air duct; the first pressure sensor and the first temperature sensor are installed at the heat storage device outlet. Abandoned wind power, abandoned photovoltaic power or valley power can be used to convert electrical energy into thermal energy through electric heating and store it in a heat storage body. When there is a need for useful heat, the heat is taken out through air to exchange heat with a heat medium to produce a heat product.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage, and in particular relates to a high-efficiency heat storage and release device and a working method. Background Art

[0002] With the rapid development of the global economy, energy demand is growing rapidly. However, the rapid consumption of fossil fuel energy has not only triggered an energy crisis, but also caused a large amount of emissions of carbon dioxide, nitrogen oxides, and sulfur oxides, which has seriously damaged the ecological environment. Therefore, energy conservation, consumption reduction, and emission reduction have become the development goals of the energy field at this stage. The total installed capacity of new energy power generation represented by wind power and photovoltaic power generation has grown rapidly, but the impact of the volatility of new energy power generation on the power grid has also led to large-scale abandonment of wind and light. Based on this, energy storage technology coupled with new energy power generation has received widespread attention in recent years. It can overcome the adverse effects of the volatility of wind and solar power generation and significantly improve energy utilization efficiency. Among them, heat storage technology is a high-efficiency energy management and utilization technology. It shows great application potential in solving these problems and is one of the important forms of energy storage.

[0003] Thermal storage technology is a technology that transfers and regulates thermal energy in time and space. It converts low-grade thermal energy resources or electrical energy into one or more thermal storage media and releases it in the form of thermal energy when needed to solve the problem of thermal energy mismatch in time and space. Energy storage refers to the process of storing energy in a certain form through a medium or equipment and releasing it in a specific form when needed. Thermal storage can be coupled with solar thermal power generation, cogeneration, and wind power generation to achieve flexible peak-shaving of electricity, clean heating, and clean energy consumption. It has important application potential in peak-shaving, building heating, and industrial production. The market development potential of thermal storage is huge. Thermal storage is divided into three types: sensible heat storage, phase change storage (or latent heat storage), and thermochemical storage. Among them, phase change thermal storage media have higher thermal energy storage density than sensible heat storage media; compared with thermochemical heat storage media, they have better safety and stability.

[0004] The heat storage and release device is the core component of the heat storage system. The common practice at present is to make the sensible heat storage material into energy storage bricks, and then build it into a heat storage body with a ventilation duct. Electric heating rods are placed in the ventilation duct. When storing heat, electric heating is used to convert electrical energy into thermal energy and store it. When heat is needed, the fan is used to drive the air flow to exchange the heat and produce hot water or steam. It has problems such as low energy storage density, uneven internal temperature distribution, low heat transfer efficiency, chaotic airflow organization when releasing heat with wind, and large flow resistance. Summary of the invention

[0005] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art and to provide a high-efficiency heat storage and release device and a working method. The device utilizes cheap electricity such as abandoned wind power, abandoned photovoltaic power or valley electricity, converts the electrical energy into thermal energy through electric heating and stores it in a heat storage body. When useful heat is needed, the heat is brought out through the air and exchanged with the heat medium, further producing thermal products such as steam, hot water, hot air, etc. for use in production and life.

[0006] In order to achieve the above technical objectives, the technical solution adopted by the present invention is:

[0007] A high-efficiency heat storage and release device comprises a heat storage device, a fan, a fan support, a circulating air duct, a second pressure sensor, a flow sensor, and a second temperature sensor. The heat storage device comprises a heat storage device outlet, a first pressure sensor, a first temperature sensor, a heat storage device inlet, a heat storage component and a temperature sensing module thereof, a heat exchanger component and a temperature sensing module thereof; the heat storage device outlet is connected to the fan inlet, the fan is fixed on the fan support, the fan outlet is connected to the circulating air duct inlet, and the circulating air duct outlet is connected to the heat storage device inlet; the second pressure sensor, the flow sensor, and the second temperature sensor are sequentially installed on the circulating air duct; the first pressure sensor and the first temperature sensor are installed on the heat storage device outlet.

[0008] To optimize the above technical solutions, the specific measures taken also include:

[0009] The above-mentioned heat storage component includes a heat storage body, fins, an electric heating rod main circuit, an electric heating rod branch circuit, a first terminal of the electric heating rod, and a second terminal of the electric heating rod; the heat storage body comprises a plurality of gradually expanding parallel flow channels, is made of a solid waste-based composite phase change material, and is arranged in multiple layers along the flow channel direction, and the proportion of the phase change material components in each layer is different and decreases stepwise along the flow channel direction; the fins are made of metal and are arranged longitudinally along the flow channel direction; the electric heating rod main circuit is connected in parallel and arranged on the side of the heat storage body; the electric heating rod branch circuit is spirally shaped, arranged in the heat storage brick, and is in direct contact with the heat storage body; the first terminal of the electric heating rod and the second terminal of the electric heating rod are arranged outside the wall of the heat storage device and are connected to the power supply through wires.

[0010] The above-mentioned heat exchanger assembly includes a heat exchanger shell, a heat exchange pipe, a heat exchange pipe inlet, and a heat exchange pipe outlet; the heat exchanger assembly contains heat medium and air; the heat medium flows in the heat exchange pipe, flows in from the heat exchange pipe inlet, and flows out from the heat exchange pipe outlet; the air flows on the outside of the heat exchange pipe to exchange heat with the heat medium; the heat exchange pipe is in the shape of a coil, evenly arranged in the heat exchanger shell, and is equipped with heat medium; the heat exchange pipe inlet and the heat exchange pipe outlet are arranged outside the wall of the heat storage device, and are connected to the heat medium outlet and inlet respectively through pipes.

[0011] The temperature sensing module of the heat storage component includes a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, a sixth temperature sensor, a seventh temperature sensor, an eighth temperature sensor, a ninth temperature sensor, a tenth temperature sensor, an eleventh temperature sensor, a twelfth temperature sensor, a thirteenth temperature sensor, and a fourteenth temperature sensor; the temperature sensing module of the heat exchanger component includes a fifteenth temperature sensor, a sixteenth temperature sensor, a seventeenth temperature sensor, an eighteenth temperature sensor, a nineteenth temperature sensor, a twentieth temperature sensor, and a twenty-first temperature sensor.

[0012] The third temperature sensor, the fourth temperature sensor, and the fifteenth temperature sensor are evenly installed on the top cover of the heat storage device; the fifth temperature sensor, the sixth temperature sensor, the seventh temperature sensor, the eighth temperature sensor, the ninth temperature sensor, the tenth temperature sensor, the eleventh temperature sensor, the twelfth temperature sensor, the thirteenth temperature sensor, the fourteenth temperature sensor, the sixteenth temperature sensor, the seventeenth temperature sensor, the eighteenth temperature sensor, the nineteenth temperature sensor, the twentieth temperature sensor, and the twenty-first temperature sensor are evenly installed on the side wall of the heat storage device.

[0013] The heat storage device described above is provided with an insulation layer on the outer side of the wall of the heat storage device, and a transition fillet is provided on the inner side of the wall of the heat storage device; a first top cover lifting ear and a second top cover lifting ear are provided on the top cover of the heat storage device for lifting the top cover; a first base lifting ear, a second base lifting ear, a third base lifting ear and a fourth base lifting ear are provided on the side wall of the heat storage device for lifting the heat storage device.

[0014] The outlet of the heat storage device is a gradually contracting air duct, and the inlet of the heat storage device is a gradually expanding air duct.

[0015] The fans and circulating air ducts are both provided with heat-insulating layers outside.

[0016] The working method of the above-mentioned high-efficiency heat storage and release device includes a heat storage process, a heat release process, and a data acquisition and control process;

[0017] The heat storage process is as follows: a first terminal of the electric heating rod of the heat component and a second terminal of the electric heating rod are connected to a cheap power source through wires, and the electric energy is converted into heat energy through electric heating and stored in the heat storage body;

[0018] The heat release process is as follows: the air circulates through the outlet of the heat storage device, the circulating air duct, the inlet of the heat storage device, the heat storage body flow channel of the heat storage assembly, and the air side of the heat exchanger assembly under the power of the fan; the air absorbs the heat of the heat storage body in the heat storage body flow channel, and the temperature rises. The heated air further exchanges heat with the heat medium in the heat exchange pipe of the heat exchanger assembly on the air side of the heat exchanger assembly, and further produces a heat product;

[0019] The data collection and control process is as follows: the first pressure sensor and the second pressure sensor respectively measure the pressure of the fan inlet and outlet, and calculate and analyze the pressure drop of the heat storage body; the flow sensor measures the air flow in the circulating air duct, and combines the temperatures at both ends of the circulating air duct measured by the first temperature sensor and the second temperature sensor respectively, to calculate and analyze the heat dissipation of the circulating air duct.

[0020] The above working method also includes measuring the temperature of various locations of the heat storage body of the heat storage component through the temperature sensing module of the heat storage component, and calculating and analyzing the heat storage amount in combination with the physical properties of the heat storage material; measuring the temperature of various locations of the heat exchanger component through the temperature sensing module of the heat exchanger component, and calculating and analyzing the heat exchange amount in combination with the physical properties of the heat medium, and further obtaining the heat exchange efficiency and the system heat storage and release efficiency.

[0021] The present invention has the following beneficial effects:

[0022] The heat storage material of the present invention is a solid waste-based (blast furnace slag, fly ash, waste concrete, etc.) composite phase change material (inorganic salt, paraffin, etc.), which utilizes both sensible heat and latent heat, has low cost, and has high energy storage density;

[0023] Considering the change of air temperature, the energy storage material in the heat storage device of the present invention is arranged in a step-by-step manner, and the proportion of phase change material in each section is reduced successively. When the wind temperature is low in the first half, the high proportion of phase change material can provide more heat. At the same time, the flow channel is arranged to be gradually expanded, so that the wind has sufficient time to exchange heat when the flow rate is low in the second half, so that the temperature distribution in the heat storage material is more uniform.

[0024] The electric heating rod of the present invention is directly arranged in the phase change material, and heat is quickly transferred by heat conduction. At the same time, longitudinal metal fins are added in the flow channel to increase the heat transfer area and achieve high heat transfer efficiency.

[0025] The inlet and outlet of the air duct of the present invention are provided with expansion and contraction air ducts, and the edges and corners of the flow channel in the heat storage device are processed with arc fillets, which improves the airflow organization, reduces the gas flow resistance, and reduces the energy consumption of the fan;

[0026] The present invention is equipped with temperature, pressure and flow sensors to monitor the operating status of the heat storage device, automatically control the power of the fan or water pump, and adjust the heat exchange air volume and water volume, with a high degree of intelligence;

[0027] The heat storage device of the present invention has a simple structure, is easy to manufacture, and is provided with lifting lugs for easy transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is the front view of the high-efficiency heat storage and release device;

[0029] Figure 2 This is the back view of the efficient heat storage and release device;

[0030] Figure 3 This is a top view of the high-efficiency heat storage and release device without a cover;

[0031] Figure 4 is a schematic diagram of a heat storage component;

[0032] Figure 5 It is a schematic diagram of the electric heating rod branch;

[0033] Figure 6 is a schematic diagram of a heat exchanger assembly;

[0034] Figure 7 It is a cross-sectional view of the structure of a high-efficiency heat storage and release device;

[0035] Figure 8 It is a top view cross-sectional view of a high-efficiency heat storage and release device;

[0036] Fig. 9 This is a cloud diagram of the temperature simulation results arranged in the air duct;

[0037] Fig.10 This is a cloud diagram of the temperature simulation results arranged inside the bricks.

[0038] The accompanying drawings are marked as follows: 1. heat storage device, 2. heat storage device outlet, 3. first pressure sensor, 4. first temperature sensor, 5. fan, 6. fan support, 7. circulating air duct, 8. second pressure sensor, 9. flow sensor, 10. second temperature sensor, 11. heat storage device inlet, 12. third temperature sensor, 13. fourth temperature sensor, 14. fifth temperature sensor, 15. sixth temperature sensor, 16. seventh temperature sensor, 17. eighth temperature sensor, 18. ninth temperature sensor, 19. tenth temperature sensor, 20. eleventh temperature sensor, 21. twelfth temperature sensor, 22. thirteenth temperature sensor, 23. fourteenth temperature sensor, 24. fifteenth temperature sensor, 25. sixteenth temperature sensor, 26. 6. The seventeenth temperature sensor, 27. The eighteenth temperature sensor, 28. The nineteenth temperature sensor, 29. The twentieth temperature sensor, 30. The twenty-first temperature sensor, 31. The heat storage component, 32. The heat storage body, 33. The fin, 34. The main circuit of the electric heating rod, 35. The branch circuit of the electric heating rod, 36. The first terminal of the electric heating rod, 37. The second terminal of the electric heating rod, 38. The heat exchanger component, 39. The heat exchanger shell, 40. The heat exchange pipe, 41. The inlet of the heat exchange pipe, 42. The outlet of the heat exchange pipe, 43. The wall of the heat storage device; 44. The insulation layer, 45. The transition fillet, 46. The top cover, 47. The first top cover ear, 48. The second top cover ear, 49. The first base ear, 50. The second base ear, 51. The third base ear, 52. The fourth base ear. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] Although the steps in the present invention are arranged with numbers, they are not used to limit the order of the steps. Unless the order of the steps is clearly stated or the execution of a certain step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" used in this article involves and covers any and all possible combinations of one or more of the associated listed items.

[0041] like Figure 1-Figure 8 As shown, the present invention provides a high-efficiency heat storage and release device, comprising a heat storage device 1, a fan 5, a fan support 6, a circulating air duct 7, a second pressure sensor 8, a flow sensor 9, and a second temperature sensor 10;

[0042] The heat storage device 1 includes a heat storage device outlet 2, a first pressure sensor 3, a first temperature sensor 4, a heat storage device inlet 11, a third temperature sensor 12, a fourth temperature sensor 13, a fifth temperature sensor 14, a sixth temperature sensor 15, a seventh temperature sensor 16, an eighth temperature sensor 17, a ninth temperature sensor 18, a tenth temperature sensor 19, an eleventh temperature sensor 20, a twelfth temperature sensor 21, a thirteenth temperature sensor 22, a fourteenth temperature sensor 23, a fifteenth temperature sensor 24, a sixteenth temperature sensor 25, a seventeenth temperature sensor 26, an eighteenth temperature sensor 27, a nineteenth temperature sensor Temperature sensor 28, twentieth temperature sensor 29, twenty-first temperature sensor 30, heat storage assembly 31, (heat storage body 32, fin 33, electric heating rod main circuit 34, electric heating rod branch circuit 35, electric heating rod first terminal 36, electric heating rod second terminal 37), heat exchanger assembly 38 (heat exchanger shell 39, heat exchange pipe 40, heat exchange pipe inlet 41, heat exchange pipe outlet 42), heat storage device wall 43, insulation layer 44, transition fillet 45, top cover 46, first top cover lifting ear 47, second top cover lifting ear 48, first base lifting ear 49, second base lifting ear 50, third base lifting ear 51, fourth base lifting ear 52;

[0043] like Figure 3 As shown, the heat storage device outlet 2 is a tapered air duct;

[0044] The fan 5 and the circulating air duct 7 include an outlet and an inlet;

[0045] The heat storage device inlet 11 is a gradually expanding air duct;

[0046] The heat storage device outlet 2 is connected to the fan 5 inlet via a flange;

[0047] The fan 5 is fixed on the fan support 6 by bolts;

[0048] The outlet of the fan 5 is connected to the inlet of the circulating air duct 7 through a flange;

[0049] The second pressure sensor 8, the flow sensor 9, and the second temperature sensor 10 are sequentially installed on the circulation air duct 7;

[0050] The fan 5 and the circulating air duct 7 are both provided with a heat preservation layer;

[0051] The outlet of the circulating air duct 7 is connected to the inlet 11 of the heat storage device through a flange;

[0052] The third temperature sensor 12, the fourth temperature sensor 13, and the fifteenth temperature sensor 24 are evenly mounted on the top cover 46 of the heat storage device 1;

[0053] The fifth temperature sensor 14, the sixth temperature sensor 15, the seventh temperature sensor 16, the eighth temperature sensor 17, the ninth temperature sensor 18, the tenth temperature sensor 19, the eleventh temperature sensor 20, the twelfth temperature sensor 21, the thirteenth temperature sensor 22, the fourteenth temperature sensor 23, the sixteenth temperature sensor 25, the seventeenth temperature sensor 26, the eighteenth temperature sensor 27, the nineteenth temperature sensor 28, the twentieth temperature sensor 29, and the twenty-first temperature sensor 30 are evenly mounted on the side wall of the heat storage device 1;

[0054] like Figure 4 As shown, the heat storage assembly 31 includes a heat storage body 32, fins 33, an electric heating rod main circuit 34, an electric heating rod branch circuit 35, a first terminal 36 of the electric heating rod, and a second terminal 37 of the electric heating rod;

[0055] The heat storage body 32 comprises a plurality of parallel flow channels, and is made of a solid waste-based (blast furnace slag, fly ash, waste concrete, etc.) composite phase change material (inorganic salt, paraffin, etc.), and is arranged in multiple layers along the flow channel direction, and the proportion of the phase change material components in each layer is different and decreases stepwise along the flow channel direction;

[0056] The fins 33 are made of metal (copper, aluminum, etc.) and are arranged longitudinally along the flow channel;

[0057] The flow channel of the heat storage body 32 is configured to be gradually expanded, so that the air velocity gradually decreases along the flow direction, and the heat exchange time is more sufficient;

[0058] The electric heating rod trunks 34 are connected in parallel;

[0059] The electric heating rod trunk 34 is arranged on the side of the heat storage body 32;

[0060] like Figure 5 As shown, the electric heating rod branch 35 is spiral-shaped, arranged in the heat storage brick, and directly in contact with the heat storage body 32;

[0061] The first terminal 36 of the electric heating rod and the second terminal 37 of the electric heating rod are arranged outside the wall surface 43 of the heat storage device and are connected to the power supply through wires;

[0062] like Figure 6 As shown, the heat exchanger assembly 38 includes a heat exchanger shell 39, a heat exchange pipe 40, a heat exchange pipe inlet 41, and a heat exchange pipe outlet 42;

[0063] The heat exchanger assembly 38 contains heat medium and air; the heat medium flows in the heat exchange pipe 40, flows in from the heat exchange pipe inlet 41, and flows out from the heat exchange pipe outlet 42; the air flows outside the heat exchange pipe 40 to exchange heat with the heat medium;

[0064] The heat exchange pipe 40 is in the shape of a coil and is evenly arranged in the heat exchanger shell 39;

[0065] The heat exchange pipe inlet 41 and the heat exchange pipe outlet 42 are arranged outside the wall surface 43 of the heat storage device, and are connected to the outlet and inlet of the heat medium respectively through pipes;

[0066] like Figure 7-Figure 8 As shown, a heat insulation layer 44 is provided on the outer side of the heat storage device wall 43 of the heat storage device 1;

[0067] A transition fillet 45 is provided inside the wall surface 43 of the heat storage device to make the air duct smooth;

[0068] The top cover 46 of the heat storage device 1 is provided with a first top cover lifting lug 47 and a second top cover lifting lug 48 for lifting the top cover;

[0069] A first base lifting lug 49 , a second base lifting lug 50 , a third base lifting lug 51 , and a fourth base lifting lug 52 are provided on the side wall surface of the heat storage device 1 for lifting the heat storage device 1 .

[0070] The working method of the above-mentioned high-efficiency heat storage and release device includes a heat storage method, a heat release method, and a data acquisition and control method;

[0071] The heat storage method is:

[0072] The first terminal 36 and the second terminal 37 of the electric heating rod are connected to cheap power sources such as abandoned wind power, abandoned photovoltaic power or valley power through wires, and the electric energy is converted into heat energy by electric heating and stored in the heat storage body 32; the electric heating rod branch 35 is arranged in the heat storage body 32 when it is manufactured and formed, and is in direct contact with the heat storage body 32, so that the heat transfer rate is fast and the temperature distribution is more uniform. Fig. 9 , Fig.10 As shown, the simulation results are carried out under the same heat storage volume and the same heating power.

[0073] The heat release method is:

[0074] Under the power of the fan 5, the air circulates through the heat storage device outlet 2, the circulation duct 7, the heat storage device inlet 11, the heat storage body 32 flow channel, and the air side of the heat exchanger assembly 38;

[0075] The air absorbs the heat of the heat storage body 32 in the flow channel of the heat storage body 32, and the temperature rises. The heat storage body 32 is arranged in multiple layers along the flow channel direction. The proportion of the phase change material components in each layer is different and decreases stepwise along the flow channel direction. When the wind temperature is low in the first half, the high proportion of phase change material can provide more heat. At the same time, the flow channel is arranged to be gradually expanded, so that the air flow velocity gradually decreases along the flow direction, the heat exchange time is more sufficient, and the temperature distribution in the heat storage material is more uniform;

[0076] The heated air further exchanges heat with the heat medium in the heat exchange pipe 40 on the air side of the heat exchanger assembly 38, and further produces thermal products such as steam, hot water, and hot air for production and life use.

[0077] The data collection and control method is as follows:

[0078] The first pressure sensor 3 and the second pressure sensor 8 respectively measure the pressure of the inlet and outlet of the fan 5, and further calculate and analyze the pressure drop of the heat storage body;

[0079] The flow sensor 9 measures the air flow in the circulating air duct 7, and the heat dissipation of the circulating air duct 7 can be calculated and analyzed in combination with the temperatures at both ends of the circulating air duct 7 respectively measured by the first temperature sensor 4 and the second temperature sensor 10. The specific calculation and analysis process of the heat dissipation can be: the heat dissipation of the circulating air duct 7 = air specific heat capacity × air flow measured by the flow sensor 9 × (temperature measured by the first temperature sensor 4 - temperature measured by the second temperature sensor 10), and the air specific heat capacity is obtained by looking up the air property table;

[0080] The third temperature sensor 12, the fourth temperature sensor 13, the fifth temperature sensor 14, the sixth temperature sensor 15, the seventh temperature sensor 16, the eighth temperature sensor 17, the ninth temperature sensor 18, the tenth temperature sensor 19, the eleventh temperature sensor 20, the twelfth temperature sensor 21, the thirteenth temperature sensor 22, and the fourteenth temperature sensor 23 are used to measure the temperature of each part of the heat storage body 32. In combination with the physical properties of the heat storage material, the heat storage amount can be calculated and analyzed. The specific calculation and analysis process of the heat storage amount can be: heat storage amount = specific heat capacity of heat storage material × mass of heat storage material × (the average value of the temperatures measured by the third temperature sensor 12, the fourth temperature sensor 13, the fifth temperature sensor 14, the sixth temperature sensor 15, the seventh temperature sensor 16, the eighth temperature sensor 17, the ninth temperature sensor 18, the tenth temperature sensor 19, the eleventh temperature sensor 20, the twelfth temperature sensor 21, the thirteenth temperature sensor 22, and the fourteenth temperature sensor 23), and the specific heat capacity and mass of the heat storage material are obtained from the actual application scenario;

[0081] The fifteenth temperature sensor 24, the sixteenth temperature sensor 25, the seventeenth temperature sensor 26, the eighteenth temperature sensor 27, the nineteenth temperature sensor 28, the twentieth temperature sensor 29, and the twenty-first temperature sensor 30 are used to measure the temperatures at various locations of the heat exchanger assembly 38. Combined with the physical properties of the heat medium, the heat exchange amount can be calculated and analyzed, and the heat exchange efficiency and the system heat storage efficiency can be further calculated and analyzed. The specific calculation and analysis process of the heat exchange efficiency can be: heat exchange efficiency = (heat medium specific heat capacity × heat medium inlet and outlet temperature difference × heat medium flow rate) / (heat exchange air specific heat capacity × air inlet and outlet temperature difference × air flow rate measured by flow sensor 9), the heat medium specific heat capacity, heat medium inlet and outlet temperature difference and heat medium flow rate are obtained from actual application scenarios; the heat exchange air specific heat capacity is obtained by looking up the physical property table; the air inlet and outlet temperature difference is measured by the fifteenth temperature sensor 24, the sixteenth temperature sensor 25, the seventeenth temperature sensor 26, the eighteenth temperature sensor 27, the nineteenth temperature sensor 28, the twentieth temperature sensor 29, and the twenty-first temperature sensor 30.

[0082] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0083] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-efficiency heat storage and release device, comprising a heat storage device (1), a fan (5), a fan support (6), a circulating air duct (7), a second pressure sensor (8), a flow sensor (9), and a second temperature sensor (10), characterized in that: The heat storage device (1) comprises a heat storage device outlet (2), a first pressure sensor (3), a first temperature sensor (4), a heat storage device inlet (11), a heat storage component (31) and a temperature sensing module thereof, a heat exchanger component (38) and a temperature sensing module thereof; the heat storage device outlet (2) is connected to the inlet of a fan (5), the fan (5) is fixed on a fan support (6), the fan (5) outlet is connected to the inlet of a circulating air duct (7), and the circulating air duct (7) outlet is connected to the heat storage device inlet (11); the second pressure sensor (8), the flow sensor (9), and the second temperature sensor (10) are sequentially mounted on the circulating air duct (7); the first pressure sensor (3) and the first temperature sensor (4) are mounted on the heat storage device outlet (2); The heat storage component (31) comprises a heat storage body (32), fins (33), an electric heating rod main circuit (34), an electric heating rod branch circuit (35), a first terminal (36) of the electric heating rod, and a second terminal (37) of the electric heating rod; the heat storage body (32) comprises a plurality of gradually expanding parallel flow channels, is made of a solid waste-based composite phase change material, and is arranged in multiple layers along the flow channel direction, and the proportion of the phase change material components in each layer is different and decreases stepwise along the flow channel direction; the fins (33) are made of metal and are arranged longitudinally along the flow channel direction; the electric heating rod main circuit (34) is connected in parallel and arranged on the side of the heat storage body (32); the electric heating rod branch circuit (35) is spiral-shaped, arranged in the heat storage brick, and directly contacts the heat storage body (32); the first terminal (36) of the electric heating rod and the second terminal (37) of the electric heating rod are arranged outside the wall (43) of the heat storage device, and are connected to the power supply through wires; The heat exchanger assembly (38) comprises a heat exchanger shell (39), a heat exchange pipe (40), a heat exchange pipe inlet (41), and a heat exchange pipe outlet (42); the heat exchanger assembly (38) contains heat medium and air; the heat medium flows in the heat exchange pipe (40), flows in from the heat exchange pipe inlet (41), and flows out from the heat exchange pipe outlet (42); the air flows outside the heat exchange pipe (40) to exchange heat with the heat medium; the heat exchange pipe (40) is in the shape of a coil, is evenly arranged in the heat exchanger shell (39), and contains heat medium; the heat exchange pipe inlet (41) and the heat exchange pipe outlet (42) are arranged outside the wall surface (43) of the heat storage device, and are respectively connected to the heat medium outlet and inlet through pipes; The working method of the efficient heat storage and release device includes heat storage process, heat release process, data acquisition and control process; The heat storage process is as follows: a first terminal (36) and a second terminal (37) of the electric heating rod of the heat storage component (31) are connected to a cheap power source via electric wires, and electrical energy is converted into thermal energy through electrical heating and stored in the heat storage body (32); The heat release process is as follows: under the power of the fan (5), the air circulates through the heat storage device outlet (2), the circulating air duct (7), the heat storage device inlet (11), the heat storage body (32) flow channel of the heat storage component (31), and the air side of the heat exchanger component (38); the air absorbs the heat of the heat storage body (32) in the heat storage body (32) flow channel, and the temperature rises; the heated air further exchanges heat with the heat medium in the heat exchange pipe (40) of the heat exchanger component (38) on the air side of the heat exchanger component (38), and further produces a heat product; The data collection and control process is as follows: the first pressure sensor (3) and the second pressure sensor (8) respectively measure the pressure at the inlet and outlet of the fan (5), and calculate and analyze the pressure drop of the heat storage body; the flow sensor (9) measures the air flow in the circulation air duct (7), and combines the temperatures at both ends of the circulation air duct (7) measured by the first temperature sensor (4) and the second temperature sensor (10), and calculates and analyzes the heat dissipation of the circulation air duct (7).

2. A high-efficiency heat storage and release device according to claim 1, characterized in that: The temperature sensing module of the heat storage component (31) comprises a third temperature sensor (12), a fourth temperature sensor (13), a fifth temperature sensor (14), a sixth temperature sensor (15), a seventh temperature sensor (16), an eighth temperature sensor (17), a ninth temperature sensor (18), a tenth temperature sensor (19), an eleventh temperature sensor (20), a twelfth temperature sensor (21), a thirteenth temperature sensor (22), and a fourteenth temperature sensor (23); the temperature sensing module of the heat exchanger component (38) comprises a fifteenth temperature sensor (24), a sixteenth temperature sensor (25), a seventeenth temperature sensor (26), an eighteenth temperature sensor (27), a nineteenth temperature sensor (28), a twentieth temperature sensor (29), and a twenty-first temperature sensor (30).

3. A high-efficiency heat storage and release device according to claim 2, characterized in that: The third temperature sensor (12), the fourth temperature sensor (13), and the fifteenth temperature sensor (24) are evenly mounted on the top cover (46) of the heat storage device (1); and the fifth temperature sensor (14), the sixth temperature sensor (15), the seventh temperature sensor (16), the eighth temperature sensor (17), the ninth temperature sensor (18), the tenth temperature sensor (19), the eleventh temperature sensor (20), the twelfth temperature sensor (21), the thirteenth temperature sensor (22), the fourteenth temperature sensor (23), the sixteenth temperature sensor (25), the seventeenth temperature sensor (26), the eighteenth temperature sensor (27), the nineteenth temperature sensor (28), the twentieth temperature sensor (29), and the twenty-first temperature sensor (30) are evenly mounted on the side wall surface of the heat storage device (1).

4. The high-efficiency heat storage and release device according to claim 1, characterized in that: The heat storage device (1) has a heat insulation layer (44) disposed on the outer side of a heat storage device wall surface (43), and a transition fillet (45) disposed on the inner side of the heat storage device wall surface (43); a first top cover lifting lug (47) and a second top cover lifting lug (48) disposed on a top cover (46) of the heat storage device (1) for lifting the top cover; and a first base lifting lug (49), a second base lifting lug (50), a third base lifting lug (51), and a fourth base lifting lug (52) disposed on a side wall surface of the heat storage device (1) for lifting the heat storage device (1).

5. The high-efficiency heat storage and release device according to claim 1, characterized in that: The heat storage device outlet (2) is a gradually converging air duct, and the heat storage device inlet (11) is a gradually expanding air duct.

6. The high-efficiency heat storage and release device according to claim 1, characterized in that: The fan (5) and the circulating air duct (7) are both provided with a heat-insulating layer outside.

7. The high-efficiency heat storage and release device according to claim 1, characterized in that: The method further includes measuring the temperature of various locations of the heat storage body (32) of the heat storage component (31) by means of a temperature sensing module of the heat storage component (31), and calculating and analyzing the amount of heat storage in combination with the physical properties of the heat storage material; measuring the temperature of various locations of the heat exchanger component (38) by means of a temperature sensing module of the heat exchanger component (38), and calculating and analyzing the amount of heat exchange in combination with the physical properties of the heat medium, and further obtaining the heat exchange efficiency and the heat storage and release efficiency of the system.

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