Temperature estimation methods for heat recovery systems and vehicles

Abstract

This invention discloses a temperature estimation method for a heat recovery system and a vehicle thereof. The temperature estimation method for the heat recovery system includes: acquiring the current and voltage of multiple generators; calculating the power generation of the multiple generators; acquiring the cold end temperature of the multiple generators; acquiring the attribute parameters of the multiple generators; and calculating the hot end temperature of the generators. By calculating the power generation using the current and voltage of the multiple generators, and calculating the hot end temperature of the multiple generators based on the power generation, the attribute parameters of the multiple generators, and the acquired cold end temperature, the hot end temperature of the multiple generators can be obtained without the need for temperature sensors. This improves the transmission speed of temperature monitoring signals in the heat recovery system, effectively simplifies the structure of the heat recovery system, increases protection for the generators, reduces the volume of the heat recovery system, thereby optimizing the spatial structure of the heat recovery system and reducing the space requirements for accommodating the heat recovery system in the vehicle.

Description

Technical Field

[0001] This invention relates to the field of vehicle exhaust energy recovery and utilization technology, and in particular to a temperature estimation method for a heat recovery system and a vehicle. Background Technology

[0002] In existing technologies, heat recovery systems typically use multiple temperature sensors or complex piping to control the temperature at the cold and hot ends. Sufficient space is required to arrange the sensors and wiring harnesses, resulting in a large size and complex structure of the heat recovery system, which is not convenient for spatial arrangement. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a temperature estimation method for a heat recovery system that can optimize the spatial structure of the heat recovery system.

[0004] The second objective of this invention is to provide a vehicle that can optimize the spatial layout of the vehicle.

[0005] According to a first aspect of the present invention, a temperature estimation method for a heat recovery system includes: Obtain the current and voltage of multiple power generation cells, and calculate the power generation power of the multiple power generation cells; Obtain the cold end temperature of the multiple power generation cells; Obtain the attribute parameters of multiple of the aforementioned power generation cells; Calculate the hot end temperature of the generator.

[0006] According to the temperature estimation method of the heat recovery system of the present invention, the power generation is calculated by the current and voltage of multiple power generating cells, and the hot end temperature of multiple power generating cells is calculated based on the power generation, the attribute parameters of multiple power generating cells, and the obtained cold end temperature of multiple power generating cells. The hot end temperature of multiple power generating cells can be obtained without the use of temperature sensors, thereby improving the transmission speed of temperature monitoring signals of the heat recovery system, effectively simplifying the structure of the heat recovery system, increasing the protection of the power generating cells, reducing the volume of the heat recovery system, thereby optimizing the spatial structure of the heat recovery system and reducing the space requirements of the vehicle for arranging the heat recovery system.

[0007] In some embodiments, the method for obtaining the current and voltage of the power generation cells and calculating the power generation power of the power generation cells includes: obtaining the voltage and current of a plurality of power generation cells in the Nth column adjacent to one end of the collector inlet; and calculating the power generation power of the plurality of power generation cells in the Nth column respectively; wherein, N satisfies: N≥1.

[0008] In some embodiments, the method for obtaining the attribute parameters of the plurality of power generating cells includes: obtaining the thermal conductivity λ of the power generating cell, the area A of the power generating cell, the thickness δ of the power generating cell, and the Seebeck coefficient S of the power generating cell. pn The generating current I of the generator and the internal resistance R of the generator. pn At least one of them.

[0009] In some embodiments, the method for calculating the hot-end temperature of the power generator includes: the hot-end flow rate of the power generator: The cold end flow rate of the generator cell: The internal resistance of the generator is: Where △T is the temperature difference between the hot and cold ends of the generator, T h T is the hot end temperature of the generator. c ρ is the cold junction temperature of the power generation element, and ρ is the resistivity of the power generation element.

[0010] In some embodiments, the power P of the power generator and the hot-end flow rate of the power generator are... and the cold end flow rate of the generator cell satisfy: .

[0011] In some embodiments, the method for obtaining the cold end temperature of the generator includes: an electronic control unit obtaining the temperature collected by a flow meter arranged at the inlet of the cooling water tank; a controller obtaining data from the electronic control unit; and obtaining the cold end flow rate of the generator.

[0012] In some embodiments, the method for calculating the hot-end temperature of the power generation element includes: obtaining the hot-end temperatures T of the plurality of power generation elements in the Nth column at time tn. tn ; Obtain the hot-end temperature T of the multiple power generation cells in the Nth column at time t(n+1). t（n+1） ; Obtain the hot-end temperature error of multiple generator cells: e=T tn -T t（n+1） , where n satisfies: n≥1.

[0013] In some embodiments, after obtaining the attribute parameters of the power generation cell and calculating the hot-end temperature of the power generation cell, the method includes: using PID control to reduce the estimated temperature error.

[0014] In some embodiments, after calculating the hot-end temperature of the power generator, the method includes: obtaining the hot-end temperature of the power generator; the hot-end temperature of the power generator being greater than the heat resistance temperature of the power generator; and the controller controlling the temperature control valve to open.

[0015] According to a second aspect of the present invention, the vehicle includes: a heat recovery system, an electronic control unit, and a controller. The heat recovery system employs the temperature estimation method of any one of the above embodiments. The heat recovery system includes an engine, a heat recovery module, and a temperature control valve. The engine has an exhaust port, and the heat recovery module is connected to the exhaust port. The heat recovery module includes a generator, a collector, and a coolant tank. The generator is disposed between the collector and the coolant tank. The coolant tank is configured as the cold end of the generator, and the collector is configured as the hot end of the generator. The coolant tank is connected to the engine. The temperature control valve is connected to both ends of the heat recovery module. The electronic control unit, the controller, and the heat recovery module communicate with each other, and the temperature control valve communicates with the controller.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a flowchart of a temperature estimation method for a heat recovery system according to an embodiment of the present invention; Figure 2 This is a partial schematic diagram of a heat recovery module according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a heat recovery system according to an embodiment of the present invention.

[0018] Figure label: 100. Heat recovery system; 10. Heat recovery module; 11. Power generator; 12. Solar collector; 13. Cooling water tank; 20. Engine; 21. Temperature control valve; 30. First path; 31. Second path; A. First direction; B. Second direction. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1 A temperature estimation method for a heat recovery system 100 according to an embodiment of the present invention is described, the temperature estimation method for the heat recovery system 100 includes: Obtain the current and voltage of multiple generator cells 11, and calculate the power generation of the multiple generator cells 11; Obtain the cold end temperature of multiple generator cells 11; Obtain the attribute parameters of multiple generator cells 11; Calculate the hot end temperature of the generator 11.

[0020] Specifically, in this application, the current and voltage of multiple power generating cells 11 are first collected, that is, the current and voltage of multiple power generating cells 11 are obtained, and the power generation of multiple power generating cells 11 is calculated respectively. Then, based on the cold end temperature of multiple power generating cells 11 and the attribute parameters of multiple power generating cells 11, the hot end temperature of multiple power generating cells 11 can be calculated.

[0021] According to the temperature estimation method of the heat recovery system 100 of the present invention, the power generation is calculated by the current and voltage of multiple power generation cells 11, and the hot end temperature of multiple power generation cells 11 is calculated based on the power generation, the attribute parameters of multiple power generation cells 11, and the obtained cold end temperature of multiple power generation cells 11. The hot end temperature of multiple power generation cells 11 can be obtained without the use of temperature sensors, thereby improving the transmission speed of temperature monitoring signals of the heat recovery system 100, increasing the protection of power generation cells 11, effectively simplifying the structure of the heat recovery system 100, reducing the volume of the heat recovery system 100, thereby optimizing the spatial structure of the heat recovery system 100 and reducing the space requirements for arranging the heat recovery system 100 in a vehicle.

[0022] According to some embodiments of the present invention, the method for obtaining the current and voltage of the power generation element 11 and calculating the power generation power of the power generation element 11 includes: obtaining the voltage and current of a plurality of power generation elements 11 in the Nth column adjacent to one end of the inlet of the collector 12; calculating the power generation power of the plurality of power generation elements 11 in the Nth column respectively; wherein, N satisfies: N≥1.

[0023] Optionally, with N=1, the voltage and current of each power generating element 11 in the first column adjacent to the inlet of the collector 12 are first collected. Then, the power generation of each power generating element 11 in the first column is calculated based on the voltage and current of each power generating element 11. Subsequently, the cold end temperature and attribute parameters of multiple power generating elements 11 can be obtained, and the hot end temperature of the multiple power generating elements 11 in the first column can be calculated. It should be noted in the specification that "each power generating element 11 in the first column" refers to the multiple power generating elements 11 in the power generating element 11 assembly formed by multiple arrayed power generating elements 11 adjacent to the inlet of the collector 12. Optionally, the distance between the multiple power generating elements 11 and the inlet along the air intake direction of the collector 12 is the same.

[0024] According to some embodiments of the present invention, the method for obtaining the property parameters of a plurality of power generating plates 11 includes: obtaining the thermal conductivity λ, the area A, the thickness δ, and the Seebeck coefficient S of the power generating plate 11. pnThe generating current I of the generator 11 and the internal resistance R of the generator 11 pn At least one of them.

[0025] In this application, before calculating the hot-end temperature of multiple power generating elements 11, it is necessary to obtain the thermal conductivity λ, area A, thickness δ, and Seebeck coefficient S of the power generating elements 11. pn The generating current I of the generator 11 and the internal resistance R of the generator 11 pn This involves obtaining the attribute parameters of multiple power generation units 11. The attribute parameters of the power generation units 11 vary depending on the specifications of the power generation units 11, allowing for the selection of different specifications of power generation units 11 based on different exhaust heat recovery scenarios to better meet practical applications. The attribute parameters of the power generation units 11 are all directly obtainable relevant parameters.

[0026] According to some embodiments of the present invention, the method for calculating the hot-end temperature of the generator 11 includes: hot-end flow rate of the generator 11: Cold end flow rate of generator 11: Internal resistance of generator 11: Where △T is the temperature difference between the hot and cold ends of the generator 11, T h T is the hot end temperature of the generator 11. c ρ is the cold junction temperature of the generator 11, and ρ is the resistivity of the generator 11.

[0027] Furthermore, the power P of the generator 11 and the hot-end flow rate of the generator 11... and cold end flow rate of generator 11 satisfy: .

[0028] By combining the above calculation formulas to calculate the power output of multiple generator plates 11, and obtaining the cold-end temperature and attribute parameters of multiple generator plates 11, the hot-end temperature T of multiple generator plates 11 can be calculated based on the relationship between the power output of multiple generator plates 11 and the hot-end and cold-end flow rates of generator plates 11, the cold-end flow rate of generator plates 11, and the attribute parameters of multiple generator plates 11. h Both the cold end flow rate and the cold end temperature can be obtained from the flow meter.

[0029] Furthermore, the method for obtaining the cold end temperature of the generator 11 includes: the electronic control unit acquiring the temperature collected by the flow meter arranged at the inlet of the cooling water tank 13; the controller acquiring the data of the electronic control unit; and acquiring the cold end flow rate of the generator 11.

[0030] After acquiring the current and voltage of multiple generator cells 11 and calculating the power generation of multiple generator cells 11, the electronic control unit acquires the temperature and flow rate collected by the flow meter arranged at the inlet of the cooling water tank 13, and transmits the acquired temperature and flow rate to the controller in the form of data. After the controller receives the input signal from the electronic control unit, it performs corresponding logical operations and substitutes the processing result into the calculation formula of the hot end flow rate of the generator cell 11 to obtain the hot end temperature of the generator cell 11.

[0031] Optionally, an electronic control unit (ECU) is a highly integrated dedicated electronic device suitable for signal acquisition, logic processing, output control, communication coordination, etc.

[0032] According to some embodiments of the present invention, the method for calculating the hot-end temperature of the power generation element 11 includes: obtaining the hot-end temperature T of the plurality of power generation elements 11 in the Nth column at time tn. tn ; Obtain the hot-end temperature T of multiple generators 11 in the Nth column at time t(n+1). t（n+1） ; Obtain the hot-end temperature error of multiple generator cells 11: e=T tn -T t（n+1） , where n satisfies: n≥1.

[0033] In this application, after obtaining the cold-end temperature and cold-end flow rate of the first row of power generating elements 11 near the inlet of the collector 12, as well as the attribute parameters of the multiple power generating elements 11 in the first row, according to... , , The hot-end temperature of the multiple generators 11 in the first column at time tn is calculated using the formula. Then, the hot-end temperature of the multiple generators 11 in the first column at time t(n+1) is calculated using the same formula. Since the cold-end temperatures of the generators 11 in the same column are relatively close, according to the formula e=T tn -T t（n+1） The hot-end temperature error of each generator piece 11 in the first column can be calculated.

[0034] According to some embodiments of the present invention, such as Figure 1 As shown, after obtaining the attribute parameters of the generator 11 and calculating the hot end temperature of the generator 11, the method includes: using PID control to reduce the estimated temperature error.

[0035] After obtaining the cold-end temperature of the first column of power generating elements 11 near the inlet of the solar collector 12, and the attribute parameters of the multiple power generating elements 11 in the first column, the hot-end temperature of the multiple power generating elements 11 in the first column at time tn and at time t(n+1) is calculated according to the formula. Then, the difference between the hot-end temperature of the multiple power generating elements 11 in the first column at time tn and at time t(n+1) is calculated, that is, the hot-end temperature error of each power generating element 11 in the first column is obtained. The estimated temperature error is reduced by using a PID control algorithm. For example, the hot-end temperature of the multiple power generating elements 11 in the first column at time t(n+2) is calculated according to the formula, and multiplied by the corresponding hot-end temperature error of the power generating element 11, so that the hot-end temperature of the multiple power generating elements 11 in the first column at time t(n+2) is more accurate, thereby more accurately estimating the hot-end temperature of the power generating elements 11, that is, the temperature at the inlet of the solar collector 12.

[0036] According to some embodiments of the present invention, after calculating the hot end temperature of the power generator 11, the method includes: obtaining the hot end temperature of the power generator 11; the hot end temperature of the power generator 11 being greater than the heat resistance temperature of the power generator 11; and the controller controlling the temperature control valve 21 to open.

[0037] By using PID control to reduce the estimated temperature error and obtaining the hot-end temperature of the generator 11, when the hot-end temperature of the generator 11 exceeds its heat resistance temperature, it indicates that the airflow temperature flowing through the collector 12 is too high. The controller then controls the temperature control valve 21 to open at a certain angle to reduce the airflow through the collector 12, thereby maintaining or reducing the surface temperature of the collector 12, and consequently reducing the hot-end temperature of the generator 11. This allows for real-time adjustment of the hot-end temperature of the generator 11, effectively protecting it from damage due to high temperatures and extending its service life.

[0038] According to a second aspect embodiment of the vehicle, in combination Figure 2 and Figure 3The vehicle includes: a heat recovery system 100, an electronic control unit, and a controller. The heat recovery system 100 employs the temperature estimation method of any of the above embodiments. The heat recovery system 100 includes an engine 20, a heat recovery module 10, and a temperature control valve 21. The engine 20 has an exhaust port, and the heat recovery module 10 is connected to the exhaust port. The heat recovery module 10 includes a generator 11, a collector 12, and a cooling water tank 13. The generator 11 is located between the collector 12 and the cooling water tank 13. The cooling water tank 13 is configured as the cold end of the generator 11, and the collector 12 is configured as the hot end of the generator 11. The cooling water tank 13 is connected to the engine 20. The temperature control valve 21 is connected to both ends of the heat recovery module 10. The electronic control unit, the controller, and the heat recovery module 10 communicate with each other, and the temperature control valve 21 communicates with the controller.

[0039] In this embodiment, the heat recovery system 100 is suitable for recovering and reusing the high-temperature exhaust gas generated by the engine 20. The heat recovery system 100 includes the engine 20, a temperature control valve 21, a heat recovery module 10, and a solar collector 12 along... Figure 2 One end of the first direction A is connected to the exhaust port, and the cooling water tank 13 is located along the solar collector 12. Figure 2 On both sides of the second direction B, and between the collector 12 and the cooling water tank 13, multiple power generating plates 11 are arranged. Utilizing the semiconductor properties of the thermoelectric material in the power generating plates 11 and the Seebeck effect (the phenomenon where electrons diffuse due to temperature difference when two different conductors or semiconductor materials come into contact, thereby generating an electromotive force in the circuit), low-quality thermal energy can be converted into high-quality electrical energy, achieving waste heat recovery. The high-temperature exhaust gas generated when the vehicle engine 20 is operating can enter the collector 12 through the exhaust port, transferring the exhaust temperature to the collector 12 through heat conduction and providing a hot-end temperature for the power generating plates 11. Flowing cooling water is introduced into the cooling water tank 13 to provide a cold-end temperature for the power generating plates 11.

[0040] Optionally, combined Figure 3 The heat recovery system 100 has a first path 30 and a second path 31. The first path 30 is the flow path for high-temperature exhaust gas in the heat recovery system 100. At least part of the high-temperature exhaust gas generated when the vehicle engine 20 is working enters the heat collector 12 through the exhaust port. The high-temperature exhaust gas exchanges heat with the generator plate 11 and is discharged from the heat collector 12. The temperature control valve 21 is connected in parallel to both ends of the heat recovery module 10. The flow rate of the airflow through the heat collector 12 can be adjusted by adjusting the opening angle of the temperature control valve 21. The second path 31 is the flow path for coolant in the heat recovery system 100. The coolant circulates between the coolant tank 13 and the engine 20, and the coolant exchanges heat with the generator plate 11.

[0041] In this application, the voltage and current of each power generation element 11 in the first column near the inlet of the solar collector 12 are first collected. Then, the power generation of each power generation element 11 in the first column is calculated based on the voltage and current of each power generation element 11 in the first column. Subsequently, the cold end temperature and attribute parameters of multiple power generation elements 11 are obtained. After obtaining the cold end temperature of the power generation elements 11 in the first column near the inlet of the solar collector 12 and the attribute parameters of multiple power generation elements 11 in the first column, the hot end temperature of multiple power generation elements 11 in the first column at time tn and the hot end temperature of multiple power generation elements 11 in the first column at time t(n+1) are calculated according to the formula. Then, the hot end temperature error of each power generation element 11 in the first column is calculated. PID control is used to reduce the estimated temperature error, so that the hot end temperature of the power generation element 11 can be estimated more accurately in real time. There is no need to set a temperature sensor at the end of the solar collector 12, which simplifies the spatial layout of the heat recovery system 100 in the vehicle and optimizes the spatial arrangement of the vehicle.

[0042] By employing the temperature estimation method described above for the heat recovery system 100, the hot-end temperature of the generator 11 in the heat recovery system 100 can be monitored in real time, and the transmission speed of the temperature monitoring signal of the heat recovery system 100 can be improved. The opening angle of the temperature control valve 21 is freely adjustable from 0 to 90°. When the hot-end temperature of the generator 11 is greater than the heat resistance temperature of the generator 11, the controller controls the temperature control valve 21 to open at a certain angle, allowing some high-temperature exhaust gas to flow out from other pipelines, thereby reducing the flow rate of the airflow through the collector 12, thus reducing the surface temperature of the collector 12, and consequently reducing the hot-end temperature of the generator 11. At the same time, the electronic control unit can control the cooling pump at the front end of the cooling water tank 13. By adjusting the speed of the cooling pump, the flow rate and flow of the coolant in the cooling water tank 13 can be adjusted, thereby reducing the cold-end temperature of the generator 11, thus regulating the cold-end temperature of the generator 11 in real time and effectively protecting the generator 11.

[0043] Optionally, the flow rate, velocity, and other signals of the coolant in the cooling water tank 13 are collected by a flow meter arranged at the inlet of the cooling water tank 13.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] In the description of this invention, "first feature" and "second feature" may include one or more of the features. In the description of this invention, "a plurality of" means two or more. In the description of this invention, "above" or "below" the second feature may include direct contact between the first and second features, or it may include contact between the first and second features not being in direct contact but through another feature between them. In the description of this invention, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0046] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0047] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for estimating the temperature of a heat recovery system (100), characterized in that, include: Obtain the current and voltage of multiple power generation cells (11), and calculate the power generation power of the multiple power generation cells (11); Obtain the cold end temperature of the plurality of said power generation cells (11); Obtain the attribute parameters of multiple of the aforementioned power generation cells (11); Calculate the hot end temperature of the generator (11).

2. The temperature estimation method for the heat recovery system (100) according to claim 1, characterized in that, The method for obtaining the current and voltage of the power generation cell (11) and calculating the power generation power of the power generation cell (11) includes: Obtain the voltage and current of the plurality of said power generating cells (11) in the Nth column near the inlet end of the solar collector (12); Calculate the power generation of each of the multiple power generation plates (11) in the Nth column; Wherein, N satisfies: N≥1.

3. The temperature estimation method for the heat recovery system (100) according to claim 1, characterized in that, The method for obtaining the attribute parameters of the plurality of the power generation cells (11) includes: The thermal conductivity λ, area A, thickness δ, and Seebeck coefficient S of the power generation plate (11) are obtained. pn The power generation current I of the power generation chip (11) and the internal resistance R of the power generation chip (11) pn At least one of them.

4. The temperature estimation method for the heat recovery system (100) according to claim 3, characterized in that, The method for calculating the hot end temperature of the power generator (11) includes: The hot end flow rate of the power generation element (11): , The cold end flow rate of the generator (11): , The internal resistance of the generator (11) is: , Wherein, △T is the temperature difference between the hot and cold ends of the power generation element (11), T h T is the hot end temperature of the power generation element (11). c ρ is the cold end temperature of the power generation element (11), and ρ is the resistivity of the power generation element (11).

5. The temperature estimation method for the heat recovery system (100) according to claim 4, characterized in that, The power P of the power generator (11) and the hot end flow rate of the power generator (11) and the cold end flow rate of the power generation unit (11) satisfy: .

6. The temperature estimation method for the heat recovery system (100) according to claim 1, characterized in that, The method for obtaining the cold end temperature of the power generation cell (11) includes: The electronic control unit acquires the temperature collected by the flow meter located at the inlet of the cooling water tank (13); The controller acquires data from the electronic control unit; Obtain the cold end flow rate of the power generation cell (11).

7. The temperature estimation method for the heat recovery system (100) according to claim 1, characterized in that, The method for calculating the hot end temperature of the power generator (11) includes: Obtain the hot-end temperature T of the multiple power generation cells (11) in the Nth column at time tn. tn ; Obtain the hot-end temperature T of the multiple power generation cells (11) in the Nth column at time t(n+1). t（n+1） ; Obtain the hot-end temperature error of multiple of the aforementioned power generation cells (11): e=T tn -T t（n+1） , where n satisfies: n≥1.

8. The temperature estimation method for the heat recovery system (100) according to claim 7, characterized in that, After obtaining the attribute parameters of the power generation element (11) and calculating the hot-end temperature of the power generation element (11), the method includes: Use PID control to reduce the error in estimated temperature.

9. The temperature estimation method for the heat recovery system (100) according to claim 1, characterized in that, After calculating the hot end temperature of the power generation element (11), the method includes: Obtain the hot end temperature of the power generation unit (11); The hot end temperature of the power generation piece (11) is greater than the heat resistance temperature of the power generation piece (11); The controller controls the temperature control valve (21) to open.

10. A vehicle, characterized in that, include: A heat recovery system (100) employs the temperature estimation method of the heat recovery system (100) according to any one of claims 1-9. The heat recovery system (100) includes an engine (20), a heat recovery module (10), and a temperature control valve (21). The engine (20) is provided with an exhaust port. The heat recovery module (10) is connected to the exhaust port. The heat recovery module (10) includes a generator (11), a collector (12), and a cooling water tank (13). The generator (11) is located between the collector (12) and the cooling water tank (13). The cooling water tank (13) is constructed as the cold end of the generator (11). The collector (12) is constructed as the hot end of the generator (11). The cooling water tank (13) is connected to the engine (20). The temperature control valve (21) is connected to both ends of the heat recovery module (10). The electronic control unit and the controller communicate with each other, and the temperature control valve (21) communicates with the controller.

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