Thermoelectric module battery-powered heat transfer fluid stirring device

Abstract

The application discloses a heat transfer working medium stirring device powered by a thermoelectric effect module battery, which comprises a stirrer rotatably connected in the inside of a solar heat collecting pipe, a stirring driving mechanism for driving the stirrer to rotate and installed on the outside of the heat collecting pipe, and a thermoelectric generator electrically connected to the stirring driving mechanism for supplying power to the stirring driving mechanism, wherein the thermoelectric generator is exposed to the external environment of the solar heat collecting pipe, the hot end surface of the thermoelectric generator is in heat transfer contact with the branch pipe of the solar heat collecting pipe, the cold end surface of the thermoelectric generator is located on the side of the body structure of the thermoelectric generator away from the solar heat collecting pipe, the hot end surface and the cold end surface are both led out with wires electrically connected to the stirring driving mechanism, a reflector for collecting sunlight to the surface of the solar heat collecting pipe is arranged below the solar heat collecting pipe, the reflector is connected with an angle adjusting structure for driving the reflector to rotate and adjusting the reflection angle, so that the stirrer can be adjusted according to the requirement of different stirring speeds, the amount of engineering for improving the heat collecting pipe is reduced, and the convective heat transfer effect between different parts of the heat transfer working medium is improved.

Description

Technical Field

[0001] This invention relates to the field of solar collector tube technology, and in particular to a stirring device for a heat transfer medium powered by a thermoelectric effect module battery. Background Technology

[0002] In existing technologies, for scientific experiments, engineering practices, or other everyday applications that utilize heat through the flow of a heat transfer medium, the uniform distribution of temperature and energy within the medium is crucial. A significant drawback of the working medium in parabolic or Fresnel solar collector tubes is that the solar reflectors often reflect and concentrate incident sunlight in the lower half of the tube, resulting in a higher temperature of the working medium in the lower half compared to the upper half, leading to uneven temperature and energy distribution. To achieve a uniform temperature and energy distribution in the heat transfer medium, installing fins or ribs inside the flow path (usually a heat pipe) is a common practice. This aims to accelerate convective heat transfer between different parts of the heat transfer medium by creating eddies. Additionally, in the solar thermal industry, a secondary reflector can be installed above the collector tube to reflect sunlight that failed to concentrate on the tube during the first reflection, concentrating it in the upper half of the tube. However, in these cases, either significant modifications to the structure of the heat pipe itself are required, or a large amount of space needs to be occupied when installing the secondary reflector, resulting in a large workload. Summary of the Invention

[0003] The purpose of this invention is to provide a heat transfer medium stirring device powered by a thermoelectric effect module battery to solve the problems existing in the prior art. By simply setting a stirrer inside the solar collector tube and utilizing the variable temperature difference between the collector tube and the external environment, the stirrer can be adjusted according to the needs of different stirring speeds, reducing the amount of engineering work required to improve the collector tube and improving the convective heat transfer effect between different parts of the heat transfer medium.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a heat transfer medium stirring device powered by a thermoelectric effect module battery, including a stirrer rotatably connected inside a solar collector tube, a stirring drive mechanism that drives the stirrer to rotate and is installed outside the collector tube, the stirring drive mechanism being electrically connected to a thermoelectric generator that supplies power to it, the thermoelectric generator being exposed to the external environment of the solar collector tube, the hot end face of the thermoelectric generator being in heat transfer contact with the branch pipe of the solar collector tube, the cold end face of the thermoelectric generator being located on the side of its main structure away from the solar collector tube and spaced apart from the solar collector tube, both the hot end face and the cold end face having wires leading out to be electrically connected to the stirring drive mechanism, a reflector for concentrating sunlight onto its surface being provided below the solar collector tube, the reflector being connected to an angle adjustment structure that drives its rotation and adjusts the reflection angle, and the solar collector tube being equipped with a flow rate sensor for monitoring the flow rate of the heat transfer medium inside it, the flow rate sensor being electrically connected to the angle adjustment mechanism.

[0005] Preferably, a cooling fan is installed on the thermoelectric generator, and the air outlet of the cooling fan faces and is close to the cold end surface.

[0006] Preferably, each of the wires is electrically connected to a lead wire, and each lead wire is electrically connected to the motor terminal of the cooling fan.

[0007] Preferably, the stirrer is a ribbon stirrer capable of generating eddies in the heat transfer medium, the ribbon stirrer having the same axial length as the solar collector tube, and the outer peripheral edge of the ribbon stirrer being close to the inner peripheral wall of the solar collector tube.

[0008] Preferably, the stirring drive mechanism is equipped with a stirring motor that starts and stops according to the flow rate of the heat transfer medium, and the stirring motor is electrically connected to the flow rate sensor.

[0009] Preferably, the stirring motor is axially mounted at one end of the solar collector tube, and the stirring motor is provided with a drive shaft that is pulsatorically connected to the stirrer. The drive shaft extends axially into the solar collector tube, and a rotational sealing assembly is provided between the drive shaft and the end of the solar collector tube.

[0010] Preferably, the solar collector tube is provided with a heat exchange part integrally formed therewith and in heat transfer contact with it, and the heat exchange part is provided with a heat exchange plane that is fitted to the hot end face.

[0011] Preferably, the heat exchange section is a branch pipe connected to the solar collector tube, the branch pipe stores the heat transfer medium, and a heat transfer cap is provided at the port of the branch pipe away from the solar collector tube, the heat transfer cap having the heat exchange plane that fits against the hot end face.

[0012] Preferably, the branch pipe is located at the end of the solar collector tube where the stirring motor is installed.

[0013] Preferably, the thermoelectric generator includes two spaced-apart heat transfer substrates and a conductor located between the two heat transfer substrates. Each conductor is mounted on the heat transfer substrate located on the same side as it. A semiconductor array for generating a potential difference is connected between the two conductors. Each wire is connected to the two conductors.

[0014] The present invention achieves the following technical effects compared to the prior art:

[0015] First, in this invention, a stirrer is installed inside the solar collector tube and driven by a stirring mechanism. Since the stirrer is separate from the solar collector tube, it does not affect the structure of the solar collector tube itself, thus eliminating the need for structural modifications. Due to this independent structure, the stirrer is suitable for both high-speed and low-speed heat transfer media. Specifically, when the flow rate of the heat transfer media is slow, the stirring effect can be enhanced by increasing the speed of the stirrer, which also promotes the flow of the heat transfer media. When the flow rate of the heat transfer media is fast, the stirrer can be kept at a low speed or even stationary. In this case, the stirrer functions similarly to fins or ribs in the solar collector tube, accelerating convective heat transfer between different parts of the heat transfer media by creating eddies. More importantly, regarding the adjustment of the stirrer's rotation speed, this invention employs a reflector located below the solar collector tube to concentrate sunlight onto its surface. This reflector is connected to an angle adjustment structure that drives its rotation and adjusts the reflection angle. Based on different needs, specifically the flow rate of the heat transfer medium monitored by a flow rate sensor, the angle adjustment structure adjusts the reflection angle of the reflector to change the illumination surface of the solar collector tube. This alters the heat collection characteristics of the solar collector tube and the temperature of the heat transfer medium, changing the heat conducted by the hot end of the thermoelectric generator. This change in temperature difference between the hot and cold ends adjusts the power supply efficiency to the stirring drive mechanism, thereby changing the driving power of the stirring drive mechanism to the stirrer and adjusting the stirring speed. This eliminates the need for an external power source, achieving the goal of stirring molten salt to achieve uniform temperature and energy distribution.

[0016] Secondly, a cooling fan is installed on the thermoelectric generator. The air outlet of the cooling fan is oriented towards and close to the cold end face. By setting up the cooling fan, cooling capacity is provided to the cold end face, further expanding the temperature difference between the cold end face and the hot end face, thus ensuring the power generation of the thermoelectric generator.

[0017] Third, each wire is electrically connected to a lead wire, and each lead wire is electrically connected to the motor terminal of the cooling fan, so that the cooling fan can be powered by the thermoelectric generator, eliminating the need for an external power supply to power the cooling fan.

[0018] Fourth, the agitator is a ribbon agitator capable of generating eddies in the heat transfer medium. The ribbon agitator has the same axial length as the solar collector tube, and the outer peripheral edge of the ribbon agitator is close to the inner peripheral wall of the solar collector tube. By setting up a ribbon agitator, when the flow rate of the heat transfer medium is relatively fast, the ribbon agitator is more easily driven by the flow of the heat transfer medium, keeping it at a low speed or stationary, thus making it easier to generate eddies to accelerate the convective heat transfer between different parts of the heat transfer medium. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This invention is a module battery-heat sink-cooling fan combination;

[0022] Figure 3 This is a perspective view of the overall structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the stirrer of the present invention. Figure 1 ;

[0024] Figure 5 This is a schematic diagram of the thermoelectric generator structure of the present invention;

[0025] Figure 6 This invention relates the output power of the thermoelectric generator to the temperature difference between the hot and cold ends.

[0026] Figure 7 This is a schematic diagram of the stirrer of the present invention. Figure 2 ;

[0027] Among them, 1-solar collector tube, 2-stirring drive mechanism, 3-branch pipe, 4-thermal generator, 5-wire, 6-heat sink, 7-cooling fan, 8-stirrer, 9-conductor, 10-heat transfer substrate, 11-semiconductor array. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The purpose of this invention is to provide a heat transfer medium stirring device powered by a thermoelectric effect module battery to solve the problems existing in the prior art. By simply setting a stirrer inside the solar collector tube and utilizing the variable temperature difference between the collector tube and the external environment, the stirrer can be adjusted according to the needs of different stirring speeds, reducing the amount of engineering work required to improve the collector tube and improving the convective heat transfer effect between different parts of the heat transfer medium.

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 1 to 7As shown, this embodiment provides a heat transfer medium stirring device powered by a thermoelectric effect module battery, including a stirrer 8 rotatably connected inside a solar collector tube 1, and a stirring drive mechanism 2 that drives the stirrer 8 to rotate and is installed outside the collector tube. Preferably, the stirrer 8 is a paddle-type stirrer 8 or a ribbon stirrer 8, etc. The stirring drive mechanism 2 can be a drive motor, etc. The stirring drive mechanism 2 is electrically connected to a thermoelectric generator 4 that supplies power to it. The thermoelectric generator 4 is exposed to the external environment of the solar collector tube 1. The hot end face of the thermoelectric generator 4 is in heat transfer contact with the branch pipe 3 of the solar collector tube 1, and the cold end face of the thermoelectric generator 4 is located at its body junction. The structure is positioned away from the solar collector tube 1 and spaced apart from it. Both the hot and cold ends have wires 5 electrically connected to the stirring drive mechanism 2. Below the solar collector tube 1 is a reflector that concentrates sunlight onto its surface. The reflector is connected to an angle adjustment mechanism that drives its rotation and adjusts the reflection angle. The solar collector tube 1 is equipped with a flow rate sensor to monitor the flow rate of the internal heat transfer medium. The flow rate sensor is electrically connected to the angle adjustment mechanism. Based on the flow rate sensor, the flow rate of the heat transfer medium is obtained, and then the angle adjustment mechanism adjusts the reflector to regulate the temperature of the heat transfer medium inside the solar collector tube 1. It is important to note that even after the angle of the solar reflector is adjusted, the minimum temperature required by the heat transfer medium is always maintained. Furthermore, since the temperature of the heat transfer medium in the solar collector tube 1 is much higher than the external environment temperature, a temperature difference exists between the heat transfer medium and the external environment. Based on the thermoelectric effect, this temperature difference can be converted into electrical energy through a thermoelectric generator 4. Therefore, the present invention utilizes the electrical energy generated by this thermoelectric effect to drive the rotation of the stirring drive mechanism 2, and then drives the rotation of the stirrer 8 through the stirring drive mechanism 2, thereby stirring the flowing working fluid in the heat pipe.

[0032] Firstly, in this invention, a stirrer 8 is installed in the solar collector tube 1, and the stirrer 8 is driven by the stirring drive mechanism 2. Since the stirrer 8 is separate from the solar collector tube 1, it does not affect the structure of the solar collector tube 1 itself, and therefore no modification to the structure of the solar collector tube 1 is required. Due to this independent structure of the stirrer 8 and the solar collector tube 1, the stirrer 8 in this invention is applicable to heat transfer media with high or low flow rates. Specifically, when the flow rate of the heat transfer media is slow, the stirring effect on the heat transfer media can be enhanced by increasing the rotation speed of the stirrer 8, while also promoting the flow of the heat transfer media; when the flow rate of the heat transfer media is fast, the stirrer 8 only needs to be kept at a low rotation speed or even stationary. At this time, the role of the stirrer 8 in the solar collector tube 1 is equivalent to that of fins or ribs, that is, to accelerate the convective heat transfer between different parts of the heat transfer media by creating eddies. More importantly, regarding the adjustment of the rotation speed of the stirrer 8, this invention uses a reflector below the solar collector tube 1 to concentrate sunlight onto its surface. The reflector is connected to an angle adjustment structure that drives its rotation and adjusts the reflection angle. According to different needs, i.e., the flow rate of the heat transfer medium monitored by the flow rate sensor, the reflection angle of the reflector is adjusted by the angle adjustment structure to change the illumination surface of the solar collector tube 1, thereby changing the heat collection characteristics of the solar collector tube 1 and the temperature of the heat transfer medium. This changes the heat conducted by the hot end face of the thermoelectric generator 4, thus changing the temperature difference between the hot and cold ends. This adjusts the power supply efficiency of the stirring drive mechanism 2, thereby changing the driving power of the stirring drive mechanism 2 to the stirrer 8, and completing the adjustment of the stirring speed of the stirrer 8. No external power supply is required, thus achieving the purpose of stirring molten salt to make its temperature and energy distribution uniform.

[0033] Furthermore, since the energy for the rotation of the stirring drive mechanism 2 and the stirrer 8 comes from the potential difference generated by the thermoelectric generator 4, and this potential difference originates from the temperature difference between the solar collector tube 1 and the external environment, this energy source is renewable and locally sourced. As long as the heat transfer medium inside the solar collector tube 1 remains in a flowing state, the corresponding temperature difference can be maintained, and this electromotive force can be continuously generated.

[0034] Furthermore, solar collector tubes are used in many industries, such as in parabolic or Fresnel solar thermal reflectors. Their internal heat transfer medium is a flowing medium, typically thermal oil or molten salt. Since the maximum operating temperature of thermal oil is generally 400℃, molten salt is typically used for applications requiring higher operating temperatures, with operating temperatures between 400-600℃. A typical molten salt is 40% potassium nitrate (KNO3) to 60% sodium nitrate (NaNO3), and can be used in solar thermal power generation, solar biomass pyrolysis, and other applications.

[0035] Preferably, a cooling fan 7 is installed on the thermoelectric generator 4. The outlet of the cooling fan 7 faces and is close to the cold end face. By setting the cooling fan 7, cooling capacity is provided to the cold end face, further increasing the temperature difference between the cold and hot ends, thus ensuring the power generation of the thermoelectric generator 4. Preferably, a heat sink 6 is attached to the cold end face, and a heat dissipation fan is installed on the other side of the heat sink 6. The combination of the cooling fan 7 and the heat sink 6 increases the heat dissipation to the cold end face. Preferably, the cooling fan 7 is embedded in the wall to suit installation on the wall of a building.

[0036] Each wire 5 is electrically connected to a lead wire, and each lead wire is electrically connected to the motor terminal of the cooling fan 7, so that the cooling fan 7 is powered by the thermoelectric generator 4, without the need to set up an external power supply for the cooling fan 7.

[0037] In a preferred embodiment of the present invention, the stirrer 8 is a ribbon stirrer 8 capable of generating eddies in the heat transfer medium. The ribbon stirrer 8 has the same axial length as the solar collector tube 1, and the outer peripheral edge of the ribbon stirrer 8 is close to the inner peripheral wall of the solar collector tube 1. By setting the ribbon stirrer 8, when the flow rate of the heat transfer medium is relatively fast, the ribbon stirrer 8 is more easily driven by the flow of the heat transfer medium, so that it can be kept at a low speed or stationary, thereby making it easier to generate eddies to accelerate the convective heat transfer between different parts of the heat transfer medium.

[0038] Furthermore, the molten salt in the molten salt parabolic concentrator solar collector tube 1 is generally 40% potassium nitrate (KNO3) to 60% sodium nitrate (NaNO3). Under typical operating temperatures of 300-500℃, the viscosity of the molten salt is 2.95-3.12 mPa·s (300℃), 2 mPa·s (400℃), and 1 mPa·s (560℃). The density is 1850-1900 kg / m³. 3 (300℃). The ribbon agitator 8 used in this invention is preferably suitable for viscosities less than 500 Pa·s, thus covering the viscosity of this molten salt at operating temperatures of 300-500℃. Relevant structural parameters of the ribbon agitator 8 include the impeller diameter D. J The blade width B, pitch S, ribbon height H1, and related parameters of the solar collector tube 1 include the inner diameter D of the collector tube, and the distance h between the end of the ribbon stirrer 8 extending into the solar collector tube 1 and its corresponding end of the solar collector tube 1, where: D J =(0.9-0.98)D; S=(0.5-1.5)D J H1 = (1.0 - 3.0)D J B = 0.1D J h = (0.01 - 0.05)D JZ1 = 1, 2.

[0039] For a heat pipe that is 1m long and has an inner diameter D of 70mm, its relevant structural parameters are as follows:

[0040] D J = (0.9)·70 = 63mm = 0.063m

[0041] S = 1·D J =0.063m

[0042] B = (0.1)·D J =0.0063m

[0043] H i =1m

[0044] The rotational speed n of the ribbon stirrer 8 is set according to specific circumstances. For example, in existing manufacturers' daily use, the speed is set to 0.5-50 rpm or 60-80 rpm. In this invention, assuming that the energy power supplied to the ribbon stirrer 8 is the output power of the aforementioned module battery, i.e., 3.5W, then the rotational speed of the ribbon stirrer 8 can be calculated under such circumstances. The process is as follows:

[0045] Assume the rotational speed of the ribbon stirrer 8 is n (r / s), and assume the density of the solar-heated molten salt does not change significantly in the molten state at 300-500℃. Since biomass pyrolysis typically requires a temperature of at least 400℃, we assume the molten salt temperature is 400℃ and its density is 1900 kg / m³. 3 In this case, the Reynolds number Re for stirring is calculated as follows:

[0046]

[0047] Therefore, to obtain the power parameter of the ribbon stirrer 8, it is necessary to first obtain the intermediate variable A:

[0048]

[0049] Where z is the number of ribbons, which is set to 2 here. Therefore, after calculation, we can obtain:

[0050] A≈3753

[0051] Therefore, the power factor N of the ribbon stirrer 8 P The calculation formula and its results are as follows:

[0052]

[0053] The general formula for calculating the power of an 8-speed mixer is:

[0054] P = N P ·n 3 ·D l 5 ·ρ

[0055] Therefore, let P = 3.5W. D J =0.063m, ρ=1900kg / m 3 Substituting the values, we can obtain the rotational speed n of the ribbon mixer 8 as follows:

[0056]

[0057] n≈43

[0058] Converting this data to its value in RPMs gives us...

[0059] n = 43 × 60 = 2580

[0060] That is, with the output power of the 3.5W module battery, the speed of the ribbon mixer 8 can reach 2580rpm.

[0061] The stirring drive mechanism 2 is equipped with a stirring motor that starts and stops according to the flow rate of the heat transfer medium. The stirring motor is electrically connected to the flow rate sensor, and the stirring motor drives the stirrer 8 to automatically control the stirring. According to the different flow rates of the heat transfer medium, the flow rate of the heat transfer medium is monitored in real time by the flow rate sensor, and the angle of the solar reflector is adjusted to complete the automatic electrical control adjustment of the stirrer 8.

[0062] Furthermore, the stirring motor is axially mounted at one end of the solar collector tube 1, and the stirring motor is equipped with a drive shaft that is connected to the stirrer 8. The drive shaft extends axially into the solar collector tube 1, and a rotating sealing assembly is provided between the drive shaft and the end of the solar collector tube 1, thus completing the installation of the stirring motor and stirrer 8 with the solar collector tube 1.

[0063] In a preferred embodiment of the present invention, the solar collector tube 1 is provided with a heat exchange part integrally formed therewith and in heat transfer contact with it. The heat exchange part is provided with a heat exchange plane that is fitted to the hot end face, so as to realize the surface-to-surface fit between the solar collector tube 1 and the hot end face, thereby improving the heat transfer efficiency of the thermoelectric generator 4.

[0064] Preferably, the heat exchange section is a branch pipe 3 connected to the solar collector pipe 1. The branch pipe 3 stores the heat transfer medium, and a heat transfer cap is provided at the end of the branch pipe 3 furthest from the solar collector pipe 1. The heat transfer cap has a heat exchange plane that fits snugly against the hot end face. The solar collector pipe 1 is connected to the branch pipe 3, and the end of the branch pipe 3 is sealed with the heat transfer cap. Hot molten salt flows continuously through the solar collector pipe 1. Because the molten salt in the solar collector pipe 1 is flowing and constantly replenished, the temperature of the molten salt in the branch pipe 3 is kept constant. Therefore, the temperature of the heat transfer cap of the branch pipe 3 can be considered equal to the temperature of the molten salt inside. Thus, a temperature difference exists between the heat transfer cap and the external environment. Preferably, the hot end face of the thermoelectric generator 4 is installed in close contact with the heat exchange plane of the heat transfer cap to achieve heat exchange between the heat transfer medium in the solar collector pipe 1 and the thermoelectric generator 4. Furthermore, it is preferable that branch pipe 3 is perpendicular to the heat collector pipe to ensure the stability of the heat transfer medium inside branch pipe 3.

[0065] Furthermore, branch pipe 3 is located at the end of solar collector tube 1 where the stirring motor is installed, facilitating the electrical connection between thermoelectric generator 4 and the stirring motor, thus simplifying the installation process.

[0066] Furthermore, the thermoelectric generator 4 preferably employs a semiconductor module battery, which includes two spaced-apart heat transfer substrates 10 and a conductor 9 located between the two heat transfer substrates 10. Preferably, the conductor 9 is a copper conductor, and the heat transfer substrates 10 are ceramic substrates. Each conductor 9 is mounted on a heat transfer substrate 10 located on the same side as it. A semiconductor array 11 for generating a potential difference is connected between the two conductors 9, and each wire 5 is connected to the two conductors 9. One heat transfer substrate 10 is attached to the surface of a heat transfer cover, so its temperature can be considered equal to the temperature of the heat transfer cover. The other heat transfer substrate 10 is attached to a heat sink 6, and the other side of the heat sink 6 is attached to a cooling fan 7. This heat sink 6-cooling fan 7 combination is directly and fully exposed to the external environment. Under the enhanced heat dissipation effect of the heat sink 6 and the cooling fan 7, the temperature of the heat transfer substrate 10 can be considered equal to the temperature of the external environment. A temperature difference exists between the two heat transfer substrates 10, thus constituting the thermoelectric generator 4. The two heat transfer substrates 10 form the hot and cold sides of the module battery. Two wires 5 extend from the two heat transfer substrates 10 and connect to the stirring drive mechanism 2. The stirring drive mechanism 2 is connected to the stirrer 8. The potential difference generated by the thermoelectric generator 4 drives the stirring drive mechanism 2 to rotate via the wires 5, which in turn drives the stirrer 8 to rotate, thereby achieving the purpose of stirring the molten salt to homogenize its temperature and energy distribution. Preferably, the stirring drive mechanism 2 is connected after passing through a DC-DC boost power supply regulator module.

[0067] The power output of the thermoelectric generator 4, made from semiconductor module batteries, is typically 1-125W. Figure 6The graph shows the function relationship between the output power and the temperature difference between the hot and cold sides of three different types of semiconductor module batteries. The difference between models 1, 2, and 3 lies in the width of the hot spot unit of the semiconductor array 11 connected between the hot and cold sides of the thermoelectric generator 4: model 1 is 1.0mm, model 2 is 1.4mm, and model 3 is 2.8mm. The size of this type of semiconductor module battery is only 40mm*40mm to ensure operability in production and application. Assuming the temperature of the molten salt inside the solar collector tube 1 is 300℃ and the ambient temperature is 100℃, then... Figure 6 It can be seen that even the lowest output power semiconductor module battery (model 1) has an output power of nearly 3.5W when the temperature difference is 200℃. Considering that in actual situations, the lowest temperature of the molten salt inside the solar collector tube 1 is generally 400℃, and the ambient temperature generally does not exceed 50℃, its output power will be even higher without damaging the semiconductor module battery.

[0068] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0069] It should be noted that, for those skilled in the art, it is obvious that the present 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 characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0070] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A thermoelectric effect module battery-powered heat transfer working fluid stirring device, characterized in that, The device includes a stirrer rotatably connected inside the solar collector tube, a stirring drive mechanism that drives the stirrer to rotate and is installed outside the collector tube, the stirring drive mechanism being electrically connected to a thermoelectric generator that supplies power to it, the thermoelectric generator being exposed to the external environment of the solar collector tube, the hot end face of the thermoelectric generator being in heat transfer contact with the solar collector tube, the cold end face of the thermoelectric generator being located on the side of its body structure away from the solar collector tube and spaced apart from the solar collector tube, both the hot end face and the cold end face having wires leading out to be electrically connected to the stirring drive mechanism, a reflector that concentrates sunlight onto its surface is provided below the solar collector tube, the reflector being connected to an angle adjustment structure that drives its rotation and adjusts the reflection angle, and the solar collector tube is equipped with a flow rate sensor for monitoring the flow rate of the heat transfer medium inside it, the flow rate sensor being electrically connected to the angle adjustment mechanism; The stirring drive mechanism is equipped with a stirring motor that starts and stops according to the flow rate of the heat transfer medium, and the stirring motor is electrically connected to the flow rate sensor.

2. The thermoelectric effect module battery-powered heat transfer working fluid stirring device according to claim 1, characterized in that, A cooling fan is installed on the thermoelectric generator, and the air outlet of the cooling fan faces and is close to the cold end face.

3. The thermoelectric effect module battery-powered heat transfer working fluid stirring device according to claim 2, characterized in that, Each of the aforementioned wires is electrically connected to a lead wire, and each of the aforementioned leads wires is electrically connected to the motor terminal of the cooling fan.

4. The thermoelectric effect module battery-powered heat transfer working fluid stirring device according to any one of claims 1 to 3, characterized in that, The stirrer is a ribbon stirrer capable of generating eddies in the heat transfer medium. The ribbon stirrer has the same axial length as the solar collector tube, and the outer peripheral edge of the ribbon stirrer is close to the inner peripheral wall of the solar collector tube.

5. The thermoelectric effect module battery-powered heat transfer working fluid stirring device according to claim 4, characterized in that, The stirring motor is axially mounted at one end of the solar collector tube, and the stirring motor is provided with a drive shaft that is connected to the stirrer. The drive shaft extends axially into the solar collector tube, and a rotational sealing assembly is provided between the drive shaft and the end of the solar collector tube.

6. The thermoelectric effect module battery-powered heat transfer working fluid stirring device according to claim 5, characterized in that, The solar collector tube is provided with a heat exchange part integrally formed with it and in heat transfer contact, and the heat exchange part is provided with a heat exchange plane that is fitted to the hot end face.

7. The thermoelectric effect module battery-powered heat transfer working fluid stirring device according to claim 6, characterized in that, The heat exchange section is a branch pipe connected to the solar collector tube. The heat transfer medium is stored in the branch pipe, and a heat transfer cap is provided at the port of the branch pipe away from the solar collector tube. The heat transfer cap has a heat exchange plane that is fitted to the hot end face.

8. The thermoelectric effect module battery-powered heat transfer working fluid stirring device according to claim 7, characterized in that, The branch pipe is located at the end of the solar collector tube where the stirring motor is installed.

9. The thermoelectric effect module battery-powered heat transfer working fluid stirring device according to claim 8, characterized in that, The thermoelectric generator includes two spaced-apart heat transfer substrates and a conductor located between the two heat transfer substrates. Each conductor is mounted on the heat transfer substrate located on the same side as it. A semiconductor array for generating a potential difference is connected between the two conductors. Each wire is connected to the two conductors.

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