Blade thermoelectric battery cycle power generation system under double thermoelectric power generation modes

Abstract

The invention relates to the technical field of thermoelectric chemical temperature difference power generation, in particular to a blade temperature difference battery circulation power generation system in a double-temperature-difference power generation mode, and solves the problems of incomplete waste heat utilization and partial energy waste caused by certain heat loss generated between a heat source and a single battery module as well as between a cold source and the single battery module in the prior art. In order to solve the problem that the generation power is limited to a certain extent, the heat treatment module comprises a heat treatment assembly, TGC modules, TREC modules, an electrolyte main flow channel and electrolyte branch flow channels, the multiple TREC modules are installed on one side of the heat treatment assembly, one TGC module is connected between every two adjacent TREC modules in an inserted mode, and the multiple TGC modules and the multiple TREC modules are arranged alternately. The TGC module is adopted as an intermediate medium for heat exchange in the blade thermoelectric battery, waste heat can be further utilized, heat loss is avoided, the thermoelectric power generation potential is fully developed, and the waste heat thermoelectric power generation power is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of thermo-electrochemical temperature difference power generation, and in particular to a blade temperature difference battery circulation power generation system in a dual temperature difference power generation mode. Background Art

[0002] A thermoelectric battery, also known as a thermoelectric battery or a Seebeck battery, refers to an energy conversion device based on the Seebeck effect. It is widely used in communications, medical care, aerospace, etc. Its principles can generally be divided into those based on spatial temperature difference and those based on temporal temperature difference. A thermal regeneration electrochemical cycle (TREC) based on temporal temperature difference refers to an electrochemical cycle system that uses temporal temperature difference for thermoelectric conversion, which includes four processes: heating, charging, cooling, and discharging. A thermogenic battery (TGC) based on spatial temperature difference is a battery driven by spatial temperature difference. Different from the working mode of TREC, a thermogenic battery generates a gradient temperature difference by applying different temperatures to two symmetrical electrodes, and realizes a potential difference based on the diffusion effect and electrochemical redox reaction.

[0003] The existing heat loss will be generated between the heat source and the cold source and the single battery module, which will lead to incomplete utilization of waste heat and some energy waste, limiting the power generation capacity to a certain extent; therefore, it does not meet the existing needs. In this regard, we propose a blade temperature difference battery circulation power generation system under a dual temperature difference power generation mode. Summary of the invention

[0004] The purpose of the present invention is to provide a blade temperature difference battery circulation power generation system under a dual temperature difference power generation mode, so as to solve the problem raised in the above background technology that a certain heat loss will be generated between the heat source and the cold source and the single battery module, resulting in incomplete utilization of waste heat and partial energy waste, which limits the power generation power to a certain extent.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a blade temperature difference battery circulation power generation system under a dual temperature difference power generation mode, comprising a heat treatment component, a TGC module, a TREC module, an electrolyte main channel and an electrolyte branch channel, a plurality of TREC modules are installed on one side of the heat treatment component, a TGC module is inserted between each two adjacent TREC modules, and the plurality of TGC modules and the TREC modules are arranged alternately, wherein an electrolyte main channel is provided between one end of two of the TGC modules and the heat treatment component, the heat treatment component comprises a waste heat collection device and a cooling device, and both sides of each of the TGC modules are in close contact with the two adjacent TREC modules.

[0006] Preferably, two of the TGC modules are connected to the waste heat collection device and the cooling device through an electrolyte main flow channel, an electrolyte branch flow channel is provided between the ends of each two adjacent TGC modules, and each two adjacent TGC modules are connected through the electrolyte branch flow channel.

[0007] Preferably, thermal conductive adhesive is coated between the TGC module and the TREC module, and the TGC module and the TREC module are bonded and fixed by the thermal conductive adhesive.

[0008] Preferably, the TREC module includes a TREC battery pack and a first heat exchange component, the first heat exchange component is coated on the outside of the TREC battery pack, the TREC battery pack includes a battery positive electrode, a battery negative electrode, a positive electrode liquid, a negative electrode liquid and an ion exchange membrane, the ion exchange membrane is arranged between the battery positive electrode and the battery negative electrode, the positive electrode liquid is filled between the battery positive electrode and the ion exchange membrane, and the negative electrode liquid is filled between the battery negative electrode and the ion exchange membrane, the TGC module includes a TGC and a second heat exchange component, the second heat exchange component is coated on the outside of the TGC, the TGC includes a battery cold electrode and a battery hot electrode, and thermocouples are installed on the surfaces of the battery positive electrode, the battery negative electrode, the battery cold electrode and the battery hot electrode.

[0009] Preferably, the first heat exchange component and the second heat exchange component are both composed of a heat storage medium and a plurality of heat exchange plates, the heat storage medium is filled into the interior of the heat exchange plates, and the plurality of heat exchange plates are arranged linearly.

[0010] Preferably, the waste heat collection device includes a heat transfer device and a heat absorbing medium, the heat absorbing medium is a common heat transfer fluid such as water or heat transfer oil, the cooling device includes a heat transfer device and a cooling medium, the cooling medium is water or air, the heat absorbing medium and the cooling medium are both filled into the interior of the heat transfer device, the interiors of the electrolyte main flow channel and the multiple electrolyte branch flow channels are both filled with electrolyte, and the heat absorbing medium and the cooling medium are both separated from the electrolyte by the heat transfer device.

[0011] Preferably, the electrolyte flows through multiple TGC modules, electrolyte branch channels and electrolyte main channels. The starting end and the end of the electrolyte flow are both connected to a waste heat collection device and a cooling device. The waste heat collection device absorbs the heat of low-grade waste heat through a heat-absorbing medium and transfers it to the electrolyte. The low-grade waste heat includes industrial waste heat, flue gas waste heat, data center waste heat and solar energy heat.

[0012] Preferably, the TREC module absorbs heat through the first heat exchange component and maintains the TREC module in a high temperature state, the TGC module absorbs heat through the second heat exchange component and maintains the cold and hot electrodes in the TGC module in a temperature difference state, and the TGC module outputs continuous electrical energy based on diffusion effect and thermoelectric effect.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention inserts a TGC module between every two TREC modules in a plurality of TREC modules, and the waste heat collection device and the cooling device respectively transport heat and cold in sequence on the inner side of the plurality of TGC modules through the electrolyte, and then adopts the TGC module group as the heat exchange intermediate medium in the blade temperature difference battery, which can realize synchronous heating and cooling of the plurality of TREC modules and synchronous output of high voltage electricity and low voltage electricity, and then the TREC module can further utilize the waste heat, fully develop the potential of temperature difference power generation, utilize the waste heat temperature difference for cyclic power generation and realize further improvement of power generation capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the installation structure of the waste heat collection device of the present invention;

[0016] Figure 2 It is a schematic diagram of the installation structure of the cooling device of the present invention;

[0017] Figure 3 This is a schematic diagram of the installation structure of the TGC module of the present invention;

[0018] Figure 4 It is a schematic diagram of the installation structure of the electrolyte branch channel of the present invention.

[0019] In the figure: 1. Waste heat collection device; 2. TGC module; 3. TREC module; 4. Electrolyte main channel; 5. Cooling device; 6. Electrolyte branch channel. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely 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, rather than all the embodiments.

[0021] See also Figure 1 and Figure 2 An embodiment of the present invention is as follows: a blade temperature difference battery circulation power generation system under a dual temperature difference power generation mode, comprising a heat treatment component, a TGC module 2, a TREC module 3, an electrolyte main channel 4 and an electrolyte branch channel 6, a plurality of TREC modules 3 are installed on one side of the heat treatment component, a TGC module 2 is inserted between each two adjacent TREC modules 3, a plurality of TGC modules 2 and TREC modules 3 are arranged alternately, both sides of each TGC module 2 are in contact with two adjacent TREC modules 3, a thermal conductive adhesive is coated between the TGC module 2 and the TREC module 3, and the TGC module 2 and the TREC module 3 are bonded and fixed by the thermal conductive adhesive.

[0022] See also Figure 1 and Figure 2 , TREC module 3 includes a TREC battery pack and a first heat exchange component, the first heat exchange component is coated on the outside of the TREC battery pack, the TREC battery pack includes a battery positive electrode, a battery negative electrode, a positive electrode liquid, a negative electrode liquid and an ion exchange membrane, the ion exchange membrane is arranged between the battery positive electrode and the battery negative electrode, the positive electrode liquid is filled between the battery positive electrode and the ion exchange membrane, and the negative electrode liquid is filled between the battery negative electrode and the ion exchange membrane, the TGC module 2 includes a TGC and a second heat exchange component, the second heat exchange component is coated on the outside of the TGC, the TGC includes a battery cold electrode and a battery hot electrode, and the surfaces of the battery positive electrode, the battery negative electrode, the battery cold electrode and the battery hot electrode are all equipped with thermocouples, and the temperature of the electrode can be monitored in real time through the thermocouples;

[0023] The first heat exchange component and the second heat exchange component are both composed of a heat storage medium and a plurality of heat exchange plates. The heat storage medium is filled into the interior of the heat exchange plates. The plurality of heat exchange plates are arranged linearly. The TREC module 3 absorbs heat through the first heat exchange component and maintains the TREC module 3 in a high temperature state. The TGC module 2 absorbs heat through the second heat exchange component and maintains the cold and hot electrodes in the TGC module 2 in a temperature difference state. The TGC module 2 outputs continuous electrical energy based on the diffusion effect and the thermoelectric effect.

[0024] See also Figure 3 and Figure 4 , wherein an electrolyte main channel 4 is provided between one end of the two TGC modules 2 and the heat treatment component, the heat treatment component includes a waste heat collection device 1 and a cooling device 5, wherein the two TGC modules 2 are connected to the waste heat collection device 1 and the cooling device 5 through the electrolyte main channel 4, an electrolyte branch channel 6 is provided between the ends of each two adjacent TGC modules 2, and each two adjacent TGC modules 2 are connected through the electrolyte branch channel 6, the electrolyte main channel 4 and the plurality of electrolyte branch channels 6 are filled with electrolyte, the electrolyte flows to the plurality of TGC modules 2, the electrolyte branch channels 6 and the electrolyte main channel 4, the starting end and the end of the electrolyte flow direction are connected to the waste heat collection device 1 and the cooling device 5, and the electrolyte flows in the electrolyte main channel 4 and the plurality of electrolyte branch channels 6 to transport heat and cold to the TGC module 2 respectively;

[0025] The waste heat collection device 1 includes a heat transfer device and a heat absorbing medium. The heat absorbing medium is a common heat transfer fluid such as water or heat transfer oil. The waste heat collection device 1 absorbs the heat of low-grade waste heat through the heat absorbing medium and transfers it to the electrolyte. The low-grade waste heat includes industrial waste heat, flue gas waste heat, data center waste heat and solar energy. The cooling device 5 includes a heat transfer device and a cooling medium. The cooling medium is water or air. The heat absorbing medium and the cooling medium are both filled into the interior of the heat transfer device. The heat absorbing medium and the cooling medium are separated from the electrolyte by the heat transfer device. The waste heat collection device 1 can input heat to multiple TGC modules 2, and the cooling device 5 can input cold to multiple TGC modules 2.

[0026] When in use, the cyclic power generation system is divided into four stages. The first stage is the heating stage, which includes the waste heat collection device 1 absorbing low-grade waste heat and then conducting the heat to each TGC module 2 in sequence through the electrolyte main channel 4 and the electrolyte in multiple electrolyte branch channels 6, and then the TGC module 2 conducts the heat to the inside of the TREC modules 3 on both sides and increases the overall temperature. The second stage is the charging stage. Since the positive electrode material of the TREC module 3 has a negative temperature coefficient and the negative electrode material has a positive temperature coefficient, the open circuit voltage of the TREC module 3 decreases, and the temperature difference inside the TGC module 2 reaches a near saturation voltage, and enters a continuous working mode. At the same time, each TREC module 3 is charged at a low voltage at a high temperature and absorbs heat due to entropy increase during the electrochemical reaction;

[0027] The third stage is the cooling stage, the waste heat collection device 1 is disconnected, and the cold energy is sequentially conducted from the cooling device 5 through the electrolyte main channel 4 and multiple electrolyte branch channels 6 to the inner side of each TGC module 2, and then conducted to the inside of each TREC module 3 so that the temperature drops to the initial state under the cooling effect, and the open circuit voltage of the TREC module 3 increases. At this time, the temperature difference between the electrolyte main channel 4 and the electrolyte branch channel 6 is reused through the TGC module 2. The fourth stage is the discharge stage. Each TGC module 2 is connected to an external circuit, and the battery is discharged to 0V in a short time, and the current rises linearly to the maximum value. Since electrons flow from the hot side to the cold side through the external circuit during the discharge process, the internal electrostatic field of the TGC module 2 is reduced, thereby reducing the battery voltage. Each TREC module 3 completes the discharge at a high voltage under a low temperature state, and the battery entropy of the TREC module 3 is reduced and heat is released to the environment until it is restored to the original discharge state, realizing a single cycle power generation operation;

[0028] The charge and discharge energy difference of the TREC module 3 is extracted as the net work W, and then the power generation cycle is repeated many times. The total power generation of each TGC module 2 based on the spatial temperature difference in the heating condition is recorded as W1, and the total power generation of each TGC module 2 based on the spatial temperature difference in the cooling condition is recorded as W2. The total power generation of each TREC module 3 due to the time temperature difference under heating and cooling is recorded as W3, and the total input heat of the cyclic power generation system is recorded as Q.

[0029] The average charge and discharge voltage difference of each TREC module 3 is:

[0030]

[0031] The total power generation of each TREC module 3 in one hour is:

[0032]

[0033] The maximum power generation efficiency of each TGC module 2 is:

[0034]

[0035] in is the thermoelectric figure of merit, that is, the power generation W1 and W2 corresponding to the thermoelectric coefficient of the material under different working conditions are:

[0036]

[0037] Then the improvement of power generation efficiency of TREC module 3 is:

[0038] 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.

Claims

1. A blade temperature difference battery cycle power generation system in a dual temperature difference power generation mode, comprising a heat treatment component, a TGC module (2), a TREC module (3), an electrolyte main channel (4) and an electrolyte branch channel (6), characterized in that: A plurality of TREC modules (3) are installed on one side of the heat treatment component, a TGC module (2) is inserted between each two adjacent TREC modules (3), and the plurality of TGC modules (2) and the TREC modules (3) are arranged alternately, wherein an electrolyte main flow channel (4) is provided between one end of each of the two TGC modules (2) and the heat treatment component, and the heat treatment component comprises a waste heat collection device (1) and a cooling device (5), and both sides of each of the TGC modules (2) are in close contact with the two adjacent TREC modules (3).

2. According to the blade temperature difference battery cycle power generation system in dual temperature difference power generation mode of claim 1, it is characterized by: The two TGC modules (2) are connected to the waste heat collection device (1) and the cooling device (5) via an electrolyte main flow channel (4), an electrolyte branch flow channel (6) is provided between the ends of each two adjacent TGC modules (2), and each two adjacent TGC modules (2) are connected to each other via the electrolyte branch flow channel (6).

3. According to the blade temperature difference battery cycle power generation system in dual temperature difference power generation mode of claim 1, it is characterized by: Thermally conductive adhesive is coated between the TGC module (2) and the TREC module (3), and the TGC module (2) and the TREC module (3) are bonded and fixed by the thermally conductive adhesive.

4. According to the blade temperature difference battery cycle power generation system in dual temperature difference power generation mode of claim 2, it is characterized by: The TREC module (3) comprises a TREC battery pack and a first heat exchange component, wherein the first heat exchange component is coated on the outside of the TREC battery pack, the TREC battery pack comprises a battery positive electrode, a battery negative electrode, a positive electrode liquid, a negative electrode liquid and an ion exchange membrane, wherein the ion exchange membrane is arranged between the battery positive electrode and the battery negative electrode, the positive electrode liquid is filled between the battery positive electrode and the ion exchange membrane, and the negative electrode liquid is filled between the battery negative electrode and the ion exchange membrane, the TGC module (2) comprises a TGC and a second heat exchange component, wherein the second heat exchange component is coated on the outside of the TGC, the TGC comprises a battery cold electrode and a battery hot electrode, and thermocouples are installed on the surfaces of the battery positive electrode, the battery negative electrode, the battery cold electrode and the battery hot electrode.

5. The blade temperature difference battery cycle power generation system in dual temperature difference power generation mode according to claim 4, characterized in that: The first heat exchange component and the second heat exchange component are both composed of a heat storage medium and a plurality of heat exchange plates. The heat storage medium is filled into the interior of the heat exchange plates, and the plurality of heat exchange plates are arranged linearly.

6. The blade temperature difference battery cycle power generation system in dual temperature difference power generation mode according to claim 5, characterized in that: The waste heat collection device (1) comprises a heat transfer device and a heat absorbing medium, wherein the heat absorbing medium is a common heat transfer fluid such as water or heat transfer oil. The cooling device (5) comprises a heat transfer device and a cooling medium, wherein the cooling medium is water or air. The heat absorbing medium and the cooling medium are both filled into the interior of the heat transfer device. The interiors of the electrolyte main flow channel (4) and the plurality of electrolyte branch flow channels (6) are both filled with electrolyte. The heat absorbing medium and the cooling medium are both separated from the electrolyte by the heat transfer device.

7. The blade temperature difference battery cycle power generation system in dual temperature difference power generation mode according to claim 6, characterized in that: The electrolyte flows through a plurality of TGC modules (2), electrolyte branch channels (6) and electrolyte main channels (4). The starting end and the end of the electrolyte flow are both connected to a waste heat collection device (1) and a cooling device (5). The waste heat collection device (1) absorbs the heat of low-grade waste heat through a heat-absorbing medium and transfers it to the electrolyte. The low-grade waste heat includes industrial waste heat, flue gas waste heat, data center waste heat and solar energy heat.

8. The blade temperature difference battery cycle power generation system in dual temperature difference power generation mode according to claim 7, characterized in that: The TREC module (3) absorbs heat through the first heat exchange component and maintains the TREC module (3) in a high temperature state, the TGC module (2) absorbs heat through the second heat exchange component and maintains the cold and hot electrodes in the TGC module (2) in a temperature difference state, and the TGC module (2) outputs continuous electric energy based on diffusion effect and thermoelectric effect.

9. The blade temperature difference battery cycle power generation system in dual temperature difference power generation mode according to claim 8, characterized in that: The formula for calculating the average charge and discharge voltage difference of each TREC module 3 is: The total power generation of each TREC module 3 within one hour is calculated as follows: The maximum power generation efficiency calculation formula of each TGC module 2 is: in is the thermoelectric figure of merit, that is, the calculation formulas for the power generation W1 and W2 corresponding to the thermoelectric coefficient of the material under different working conditions are: Then the improvement of power generation efficiency of TREC module 3 is: Where W is the net work of extracting the charge and discharge energy difference of the TREC module 3, W1 is the total power generation of each TGC module 2 based on spatial temperature difference power generation under heating conditions, W2 is the total power generation of each TGC module 2 based on spatial temperature difference power generation under cooling conditions, W3 is the total power generation generated by each TREC module 3 due to the time temperature difference under heating and cooling, and Q is the total input heat of the cycle power generation system.

Images