Visual demonstration teaching aid device for heat storage and heat release processes of phase change material

Abstract

The invention relates to the technical field of teaching tools, in particular to a visual demonstration teaching aid device for heat storage and heat release processes of a phase change material. The visual demonstration teaching aid device comprises a teaching aid base, and a heating module, a heating circulation module, a phase change heat storage module, a heat release circulation module, a phase change heat release module and a controller which are fixedly mounted on the teaching aid base, the controller is electrically connected with the heating module, the heating circulation module and the heat release circulation module, and the controller monitors the temperature of the heating module through a first temperature sensor and monitors the temperature of the phase change heat storage module through a second temperature sensor. By arranging a set of reasonable teaching aid and controlling the teaching aid through an accurate control technology and a monitoring technology, the temperature change process of heat storage and heat release of the phase change material can be reasonably and vividly displayed, and the basic principle of phase change heat storage can be effectively displayed, so that students can be helped to understand knowledge, and the teaching quality and efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of teaching tools, in particular to a visual demonstration teaching aid device for heat storage and heat release processes of phase change materials. Background Art

[0002] Phase change thermal storage is an energy storage technology based on phase change materials. It is an important technology for improving energy efficiency and environmental protection. It mainly relies on internal phase change materials to store thermal energy, and then exchanges heat through heat exchange media to solve the problem of mismatch in heat use in time and space. It has been widely used in a variety of systems. The relevant principle technology of phase change thermal storage is widely used, and can generate huge economic benefits and save industrial energy consumption. Therefore, the knowledge of phase change thermal storage principle has also been added to the education and teaching courses.

[0003] When conducting teaching applications of phase change heat storage, the existing technology still has the following defects during use: In actual education and teaching, teaching is usually completed in the form of theoretical narration, but if the theory related to phase change heat storage is explained in a theoretical form, it will be difficult to understand and not vivid enough, and the actual principle process cannot be intuitively demonstrated, which will affect the teaching quality and teaching progress.

[0004] In view of this, the present invention proposes a visual demonstration teaching aid device for the heat storage and heat release process of phase change materials to solve the existing problems. Summary of the invention

[0005] The purpose of the present invention is to provide a visual demonstration teaching aid device for the heat storage and heat release process of phase change materials, so as to solve the problem that the phase change heat storage theory proposed in the above background technology is difficult to understand and lacks visual representation when explained in theoretical form.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A visual demonstration teaching aid device for heat storage and heat release process of phase change materials, comprising a teaching aid base and a heating module, a heating cycle module, a phase change heat storage module, a heat release cycle module, a phase change heat release module, and a controller fixedly mounted on the teaching aid base;

[0008] The controller is electrically connected to the heating module, the heating cycle module, and the heat release cycle module. The controller monitors the temperature of the heating module through a first temperature sensor, monitors the temperature of the phase change heat storage module through a second temperature sensor, and monitors the temperature of the phase change heat release module through a third temperature sensor.

[0009] The controller is provided with a display module for displaying numerical values, an operation key group, an external plug and a main switch.

[0010] Preferably, the heating module includes an electromagnetic heater and a first beaker with a nozzle installed on the electromagnetic heater, the controller is electrically connected to the electromagnetic heater, the first beaker with a nozzle is filled with pure water and has a first upper nozzle and a first lower nozzle on the outer wall, and the monitoring point of the first temperature sensor is located in the first beaker with a nozzle.

[0011] Preferably, the heating circulation module includes a first circulation pipe, a second circulation pipe, and a third circulation pipe, a first control valve is installed on the first circulation pipe, the water inlet end of the first circulation pipe is connected to the first lower nozzle, the water outlet end of the first circulation pipe is connected to the water inlet end of the second circulation pipe through a heating circulation pump, the water outlet end of the second circulation pipe is connected to the first upper nozzle through the phase change heat storage module and the third circulation pipe, and a second control valve is installed on the third circulation pipe.

[0012] Preferably, the phase change heat storage module includes a jacketed beaker with a nozzle, and a phase change material contained in the inner cavity of the jacketed beaker with a nozzle, and the outer peripheral wall of the jacketed beaker with a nozzle is provided with a second upper nozzle and a second lower nozzle, the second upper nozzle is connected to the water inlet end of the third circulation pipe, and the second lower nozzle is connected to the water outlet end of the second circulation pipe, and the monitoring point of the second temperature sensor is located in the inner cavity of the jacketed beaker with a nozzle.

[0013] Preferably, the inner wall thickness of the spouted jacketed beaker is one millimeter and the outer wall thickness is two millimeters. A water storage cavity is provided between the inner wall and the outer wall of the spouted jacketed beaker. An insulating layer is provided on the outer peripheral surface of the outer wall of the spouted jacketed beaker. The upper port of the spouted jacketed beaker has an insulating cover.

[0014] Preferably, the phase change heat release module comprises a second beaker with a nozzle, wherein the second beaker with a nozzle contains pure water and a third upper nozzle and a third lower nozzle are provided on the wall, and the monitoring point of the third temperature sensor is located in the inner cavity of the second beaker with a nozzle.

[0015] Preferably, the exothermic circulation module comprises an upper pipeline, an exothermic coil body and a lower pipeline which are interconnected, the exothermic coil body extends into the inner cavity of the nozzle jacketed beaker, the upper pipeline is sequentially installed with an exothermic circulation pump and a third control valve, and the lower pipeline is installed with a fourth control valve.

[0016] Preferably, the controller is electrically connected to the heating circulation pump via a heating circulation pump control switch, and the controller is electrically connected to the heat release circulation pump via a heat release circulation pump control switch.

[0017] Preferably, the first circulation pipeline, the second circulation pipeline, the third circulation pipeline, the upper pipeline and the lower pipeline all have double-layer pipe walls.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention provides a set of reasonable teaching aids and controls the teaching aids through precise control technology and monitoring technology, and measures the temperature changes of water in the first beaker with a nozzle and the second beaker with a nozzle and the temperature change of the phase change material in the jacketed beaker with a nozzle during the heating process and the heat release process. It can reasonably and vividly demonstrate the temperature change process of heat storage and heat release of the phase change material, effectively demonstrate the basic principle of phase change heat storage, thereby helping students understand knowledge and improving teaching quality and efficiency.

[0020] 2. The present invention ensures that there will not be excessive loss in the process of heat exchange by making the inner wall thickness of the spouted jacketed beaker one millimeter and the outer wall thickness of two millimeters, and the outer peripheral surface of the outer wall of the spouted jacketed beaker is coated with a heat insulation layer, and the upper port of the spouted jacketed beaker has a double-layer insulation cover, thereby ensuring the accuracy of monitoring and demonstration. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the layout process of the present invention;

[0022] Figure 2 It is a schematic diagram of the layout of the heating module of the present invention;

[0023] Figure 3 It is a schematic diagram of the layout of the phase change heat release module of the present invention;

[0024] Figure 4 It is a schematic diagram of a controller of the present invention;

[0025] Figure 5 It is a schematic cross-sectional structure diagram of a first beaker of the present invention;

[0026] Figure 6 It is a schematic cross-sectional structure diagram of a second beaker with a nozzle according to the present invention;

[0027] Figure 7 It is a schematic diagram of the cross-sectional structure of a beaker with a nozzle and a jacket of the present invention;

[0028] In the figure: 1. teaching aid base; 2. heating module; 21. electromagnetic heater; 22. first nozzle beaker; 221. first upper nozzle; 222. first lower nozzle; 3. heating circulation module; 31. first circulation pipeline; 311. first control valve; 32. second circulation pipeline; 33. third circulation pipeline; 331. second control valve; 4. phase change heat storage module; 41. nozzle jacket beaker; 411. second upper nozzle; 412. second lower nozzle; 42. phase change material; 43. water storage cavity; 44. heat insulation layer; 45. heat insulation cover; 5. heat release circulation module; 51 , upper pipeline; 511, third control valve; 52, exothermic coil body; 53, lower pipeline; 531, fourth control valve; 6, phase change exothermic module; 61, second nozzle beaker; 611, third upper nozzle; 612, third lower nozzle; 7, controller; 71, display module; 72, operation key group; 73, external plug; 74, main switch; 81, first temperature sensor; 82, second temperature sensor; 83, third temperature sensor; 9, heating circulation pump; 10, exothermic circulation pump; 12, heating circulation pump control switch; 13, exothermic circulation pump control switch. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] In the present invention, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0032] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the term "plurality" shall mean two or more.

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] Embodiment 1

[0036] like Figures 1 to 7 As shown, a visual demonstration teaching aid device for the heat storage and heat release process of a phase change material proposed in the present invention includes a teaching aid base 1 and a heating module 2 fixedly installed on the teaching aid base 1, a heating cycle module 3, a phase change heat storage module 4, a heat release cycle module 5, a phase change heat release module 6, and a controller 7.

[0037] The controller 7 is electrically connected to the heating module 2, the heating cycle module 3, and the heat release cycle module 5. The controller 7 monitors the temperature of the heating module 2 through the first temperature sensor 81, monitors the temperature of the phase change heat storage module 4 through the second temperature sensor 82, and monitors the temperature of the phase change heat release module 6 through the third temperature sensor 83. When in use, the present invention provides a set of reasonable teaching aids and controls the teaching aids through precise control technology and monitoring technology, and measures the temperature changes of water in the first beaker 22 with a nozzle and the second beaker 61 with a nozzle during the heating process and the heat release process, and the temperature changes of the phase change material in the jacketed beaker 41 with a nozzle. It can reasonably and vividly display the temperature change process of heat storage and heat release of the phase change material, effectively demonstrate the basic principles of phase change heat storage, and help students understand knowledge, thereby improving teaching quality and efficiency.

[0038] The controller 7 is provided with a display module 71 for displaying numerical values, an operation key group 72, an external plug 73, and a main switch 74; when in use, the display module 71 can display the water temperature in the first nozzle beaker 22 according to the system operation status, can display the specific temperature of the phase change material in the inner cavity of the nozzle jacket beaker 41, and can also display the water temperature in the second nozzle beaker 61; the operation key group 72 can set the heating temperature, heating power and other parameters of the electromagnetic heater 21 according to the use requirements; the external plug 73 is used to power the teaching aid circuit system; the main switch 74 is used to control the opening and closing of the main circuit of the teaching aid circuit system.

[0039] Furthermore, the heating module 2 includes an electromagnetic heater 21 and a first beaker 22 with a nozzle installed on the electromagnetic heater 21. The controller 7 is electrically connected to the electromagnetic heater 21. The first beaker 22 with a nozzle is filled with pure water and has a first upper nozzle 221 and a first lower nozzle 222 on the outer wall. The monitoring point of the first temperature sensor 81 is located in the first beaker 22 with a nozzle. When in use, the electromagnetic heater 21 heats the pure water in the first beaker 22 with a nozzle by electromagnetic heating; the heat is transferred to the phase change material in the beaker 41 with a nozzle through the first upper nozzle 221, the first lower nozzle 222, the first circulation pipe 31, the first control valve 311, the second circulation pipe 32, the third circulation pipe 33, the second control valve 331, and the phase change heat storage module 4 to realize heat storage.

[0040] Further, the heating circulation module 3 includes a first circulation pipeline 31, a second circulation pipeline 32, and a third circulation pipeline 33. A first control valve 311 is installed on the first circulation pipeline 31. The water inlet end of the first circulation pipeline 31 is connected to the first lower nozzle 222, and the water outlet end of the first circulation pipeline 31 is connected to the water inlet end of the second circulation pipeline 32 through the heating circulation pump 9. The water outlet end of the second circulation pipeline 32 is connected to the first upper nozzle 221 through the phase change heat storage module 4 and the third circulation pipeline 33. A second control valve 331 is installed on the third circulation pipeline 33. When in use, the first upper nozzle 221 is used to connect the third circulation pipeline 33 to transport the heat-released water back to the first nozzle beaker 22.

[0041] The first lower nozzle 222 is used to connect to the first circulation pipeline 31 to transport the hot water heated in the first nozzle beaker 22 to the heating circulation pump 9 .

[0042] Through the above arrangement, the effect of heating the phase change material is achieved.

[0043] Furthermore, the phase change heat storage module 4 includes a jacketed beaker 41 with a nozzle, and a phase change material 42 contained in the inner cavity of the jacketed beaker 41 with a nozzle. The outer peripheral wall of the jacketed beaker 41 with a nozzle is provided with a second upper nozzle 411 and a second lower nozzle 412. The second upper nozzle 411 is connected to the water inlet end of the third circulation pipe 33, and is used to transport the heat-released water back to the first beaker 22 with a nozzle for reheating; the second lower nozzle 412 is connected to the water outlet end of the second circulation pipe 32, and is used to transport the water flowing out of the heating circulation pump 9 to the water storage cavity 43 of the jacketed beaker 41 with a nozzle, so as to realize the heating of the phase change material; the monitoring point of the second temperature sensor 82 is located in the inner cavity of the jacketed beaker 41 with a nozzle, so as to realize the accurate collection of temperature.

[0044] Furthermore, the inner wall thickness of the spouted jacketed beaker 41 is one millimeter and the outer wall thickness is two millimeters. When in use, the heat loss of hot water is reduced, and the heat in the hot water is more easily transferred to the phase change material through the inner wall of the spouted jacketed beaker 41. A water storage cavity 43 is provided between the inner wall and the outer wall of the spouted jacketed beaker 41. Hot water is temporarily stored in the water storage cavity 43, thereby ensuring that the hot water can exchange heat. An insulating layer 44 is provided on the outer peripheral surface of the outer wall of the spouted jacketed beaker 41, and an insulating cover 45 is provided at the upper port of the spouted jacketed beaker 41. When in use, the insulating layer 44 can reduce the heat loss when water is transported, and the heat loss of hot water is further reduced through the insulation of the insulating cover 45, ensuring that there will not be excessive loss in the process of heat exchange, thereby ensuring the accuracy of monitoring and demonstration.

[0045] Furthermore, the phase change heat release module 6 includes a second beaker with a nozzle 61, in which pure water is contained and a third upper nozzle 611 and a third lower nozzle 612 are provided on the wall, and the monitoring point of the third temperature sensor 83 is located in the inner cavity of the second beaker with a nozzle 61; when in use, the second beaker with a nozzle 61 is used to store water to be heated.

[0046] The third upper nozzle 611 is used to connect to the lower pipeline 53, and transport the water in the heat release coil body 52 in the nozzle jacket beaker 41 to the second nozzle beaker 61 through the lower pipeline 53 to release heat and heat the water to be heated.

[0047] The third lower nozzle 612 is used to connect to the upper pipeline 51 to transport the water to be heated in the second nozzle beaker 61 to the upper pipeline 51 until it is reheated in the exothermic coil body 52 in the nozzle jacket beaker 41.

[0048] Furthermore, the heat release circulation module 5 includes an upper pipeline 51, a heat release coil body 52, and a lower pipeline 53 that are interconnected. The heat release coil body 52 extends into the inner cavity of the nozzle jacketed beaker 41. The upper pipeline 51 is successively installed with a heat release circulation pump 10 and a third control valve 511, and the lower pipeline 53 is installed with a fourth control valve 531. When in use, the flow and flow rate of water in the pipeline can be achieved by adjusting the installed heat release circulation pump 10, thereby avoiding heat loss in the water and ensuring the rationality of the teaching aid demonstration. At the same time, by controlling the third control valve 511 and the fourth control valve 531, the size of the water flow in the pipeline and whether to suspend the flow can be adjusted, thereby better demonstrating the principle of heat storage of phase change materials.

[0049] Furthermore, the controller 7 is electrically connected to the heating circulation pump 9 through the heating circulation pump control switch 12. When in use, the heating circulation pump control switch 12 is turned on so that the controller 7 can directly control the heating circulation pump 9 to work, and closing the heating circulation pump control switch 12 can temporarily suspend the heating circulation pump 9; the controller 7 is electrically connected to the heat release circulation pump 10 through the heat release circulation pump control switch 13. When in use, the heat release circulation pump control switch 13 is turned on so that the controller 7 can directly control the heat release circulation pump 10 to work, and closing the heat release circulation pump control switch 13 can temporarily suspend the heat release circulation pump 10.

[0050] Furthermore, the first circulation pipe 31, the second circulation pipe 32, the third circulation pipe 33, the upper pipe 51, and the lower pipe 53 all have double-layer pipe walls; by using double-layer pipe walls, heat loss during the flow of hot water is significantly reduced, ensuring the stability of heat transfer.

[0051] The working principle of the visual demonstration teaching aid device for heat storage and heat release process of phase change materials based on the first embodiment is as follows: when the present invention is used, firstly, the device mainly includes two processes of heating and heat release:

[0052] Heating process: the controller 7 obtains electric energy through the external plug 73, and outputs 220V AC and 24V DC through the internal circuit; the electric energy is converted into heat energy through the electromagnetic heater 21, thereby heating the pure water in the first nozzle beaker 22 to form high-temperature hot pure water; the high-temperature pure water in the first nozzle beaker 22 is transported to the water storage cavity 43 of the nozzle jacket beaker 41 through the first circulation pipeline 31, the second circulation pipeline 32, and the heating circulation pump 9 for short-term storage, releasing heat, and transferring the heat to the phase change material in the nozzle jacket beaker 41 to complete the heat storage; the cooled water is transported to the first nozzle beaker 22 through the third circulation pipeline 33 and reheated. At this time, the heat release circulation pump 10 does not operate.

[0053] Heat release process: The water to be heated in the second nozzle beaker 61 passes through the heat release circulation pump 10, the upper pipeline 51, the heat release coil body 52, and the lower pipeline 53. The heat stored in the phase change material in the nozzle jacket beaker 41 is transferred to the water to be heated in the heat release coil body 52. ​​After the water to be heated is heated by the phase change material, it is transported to the second nozzle beaker 61 through the lower pipeline 53. The heat stored in the phase change material is released to add the water to be heated in the second nozzle beaker 61, and the heating circulation pump 9 is not running at this time. Through the reasonable demonstration of the above teaching aids, the heat storage principle of the phase change material is vividly demonstrated, and the teaching efficiency is improved.

[0054] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A visual demonstration teaching aid device for the heat storage and heat release process of phase change materials, characterized by: It comprises a teaching aid base (1), and a heating module (2), a heating circulation module (3), a phase change heat storage module (4), a heat release circulation module (5), a phase change heat release module (6), and a controller (7) which are fixedly mounted on the teaching aid base (1); The controller (7) is electrically connected to the heating module (2), the heating circulation module (3), and the heat release circulation module (5); the controller (7) monitors the temperature of the heating module (2) through a first temperature sensor (81), monitors the temperature of the phase change heat storage module (4) through a second temperature sensor (82), and monitors the temperature of the phase change heat release module (6) through a third temperature sensor (83); The controller (7) has a display module (71) for displaying numerical values, an operation key group (72), an external plug (73), and a main switch (74).

2. The visual demonstration teaching aid device for heat storage and heat release process of phase change materials according to claim 1, characterized in that: The heating module (2) comprises an electromagnetic heater (21) and a first beaker with a nozzle (22) mounted on the electromagnetic heater (21); the controller (7) is electrically connected to the electromagnetic heater (21); the first beaker with a nozzle (22) contains pure water and has a first upper nozzle (221) and a first lower nozzle (222) on its outer wall; and the monitoring point of the first temperature sensor (81) is located inside the first beaker with a nozzle (22).

3. The visual demonstration teaching aid device for heat storage and heat release process of phase change materials according to claim 2, characterized in that: The heating circulation module (3) comprises a first circulation pipeline (31), a second circulation pipeline (32), and a third circulation pipeline (33); a first control valve (311) is installed on the first circulation pipeline (31); a water inlet end of the first circulation pipeline (31) is connected to the first lower nozzle (222); a water outlet end of the first circulation pipeline (31) is connected to the water inlet end of the second circulation pipeline (32) via a heating circulation pump (9); a water outlet end of the second circulation pipeline (32) is connected to the first upper nozzle (221) via the phase change heat storage module (4) and the third circulation pipeline (33); and a second control valve (331) is installed on the third circulation pipeline (33).

4. The visual demonstration teaching aid device for heat storage and heat release process of phase change materials according to claim 3 is characterized in that: The phase change heat storage module (4) comprises a jacketed beaker with a nozzle (41) and a phase change material (42) contained in the inner cavity of the jacketed beaker with a nozzle (41); a second upper nozzle (411) and a second lower nozzle (412) are provided on the outer peripheral wall of the jacketed beaker with a nozzle (41); the second upper nozzle (411) is connected to the water inlet end of the third circulation pipeline (33); the second lower nozzle (412) is connected to the water outlet end of the second circulation pipeline (32); and the monitoring point of the second temperature sensor (82) is located in the inner cavity of the jacketed beaker with a nozzle (41).

5. The visual demonstration teaching aid device for heat storage and heat release process of phase change materials according to claim 4, characterized in that: The inner wall thickness of the spouted jacketed beaker (41) is one millimeter, and the outer wall thickness is two millimeters. A water storage cavity (43) is provided between the inner wall and the outer wall of the spouted jacketed beaker (41). A heat insulating layer (44) is provided on the outer peripheral surface of the outer wall of the spouted jacketed beaker (41). The upper port of the spouted jacketed beaker (41) is provided with a heat insulating cover (45).

6. The visual demonstration teaching aid device for heat storage and heat release process of phase change materials according to claim 1, characterized in that: The phase change heat release module (6) comprises a second beaker with a nozzle (61), wherein the second beaker with a nozzle (61) contains pure water and has a third upper nozzle (611) and a third lower nozzle (612) formed on the wall, and the monitoring point of the third temperature sensor (83) is located in the inner cavity of the second beaker with a nozzle (61).

7. The visual demonstration teaching aid device for heat storage and heat release process of phase change materials according to claim 4, characterized in that: The heat release circulation module (5) comprises an upper pipeline (51), a heat release coil body (52), and a lower pipeline (53) which are interconnected. The heat release coil body (52) extends into the inner cavity of the nozzle jacket beaker (41). The upper pipeline (51) is sequentially installed with a heat release circulation pump (10) and a third control valve (511). The lower pipeline (53) is installed with a fourth control valve (531).

8. The visual demonstration teaching aid device for heat storage and heat release process of phase change materials according to claim 7, characterized in that: The controller (7) is electrically connected to the heating circulation pump (9) via a heating circulation pump control switch (12), and the controller (7) is electrically connected to the heat release circulation pump (10) via a heat release circulation pump control switch (13).

9. The visual demonstration teaching aid device for heat storage and heat release process of phase change materials according to claim 7, characterized in that: The first circulation pipeline (31), the second circulation pipeline (32), the third circulation pipeline (33), the upper pipeline (51), and the lower pipeline (53) all have double-layer pipe walls.

Images