A method and device for measuring the corrosion degree of a radiator

Abstract

The present invention provides a method and device for measuring the corrosion degree of a radiator. The method includes: obtaining the air parameters, structural parameters of the radiator to be measured, and the fluid parameters and operation data of the same type of radiator; obtaining the air-side heat transfer coefficient and total heat transfer area of the fins of the radiator to be measured according to the structural parameters, operation data and air parameters; obtaining the surface efficiency of the radiator according to the air parameters and fluid parameters, in combination with the total heat transfer area and air-side heat transfer coefficient, so as to obtain the fin efficiency, and obtaining the corrosion degree measurement result according to the heat dissipation form and fin efficiency of the fins. Compared with the prior art, the present invention measures the corrosion degree of the radiator in real time according to the air parameters, structural parameters of the radiator and the fluid parameters and operation data of the same type of radiator, based on the efficiency of the radiator and the air environment conditions, without affecting the operation of the radiator, improves the safety and economy of the measurement, and effectively reduces the troubleshooting and maintenance costs of technicians.

Description

Technical Field

[0001] The present invention relates to the field of radiators, and particularly to a method and device for measuring the corrosion degree of a radiator. Background Art

[0002] With the gradual expansion of the application of offshore wind turbines to deep - sea areas and the continuous increase in the single - unit capacity of wind turbines, the problem of over - high temperature of electrical components in wind turbines has become increasingly prominent. The situation of wind turbines shutting down due to high temperature or operating with power limitation often occurs, and these phenomena are often closely related to the performance degradation of radiators. Since the equipment is exposed to humid air containing corrosive salt spray for a long time, such alternating environmental conditions easily cause salt spray particles to deposit on the surface of external equipment, resulting in air - side corrosion of the radiator, especially on the fin surface, the brazed layer exposed area of the partition plate, and the triangular weld area, seriously affecting the efficiency and reliability of the radiator.

[0003] In the prior art, when a radiator fails, it is usually handled through troubleshooting and repair by technicians, or through the coupon method or the corrosion probe on - line monitoring method for corrosion degree detection. However, these methods are different from the actual working environment of the radiator, which will lead to an increase in unplanned maintenance, and the maintenance cost of the radiator is high, which may affect the operation reliability, safety, and economy of the equipment. Summary of the Invention

[0004] The present invention provides a method and device for measuring the corrosion degree of a radiator to solve the technical problem of how to measure the corrosion degree during the operation of the radiator and effectively reduce the maintenance cost of the radiator.

[0005] To solve the above - mentioned technical problem, an embodiment of the present invention provides a method for measuring the corrosion degree of a radiator, including:

[0006] Obtaining the air parameters, structural parameters of the radiator to be measured, and the historical fault - free operation parameters of the same - type radiator; wherein, the historical fault - free operation parameters include fluid parameters and operation data;

[0007] Obtaining the air - side heat transfer coefficient and the total heat transfer area of the fins of the radiator to be measured according to the structural parameters, the operation data, and the air parameters;

[0008] Obtaining the surface efficiency of the radiator to be measured according to the air parameters and the fluid parameters, in combination with the total heat transfer area and the air - side heat transfer coefficient;

[0009] According to the structural parameters and the surface efficiency, the fin efficiency of the radiator to be measured is calculated, and according to the heat dissipation form of the fins and the fin efficiency, the corrosion equivalent of the corrosion scale layer in the radiator to be measured is obtained, so as to obtain the measurement result of the corrosion degree of the radiator to be measured. Implementing the embodiments of the present application, through the air parameters, structural parameters of the radiator and the historical trouble-free operation parameters of the same type of radiator, the air-side heat transfer coefficient of the radiator fins is measured in real time, and combined with the total fin heat transfer area, the surface efficiency of the radiator to be measured is obtained, so as to obtain the fin efficiency, measure the corrosion equivalent of the corrosion scale layer in the radiator to be measured, and measure the corrosion degree of the radiator in real time according to the efficiency of the radiator and the air environment conditions, without affecting the operation of the radiator, improving the safety and economy of the measurement, and effectively reducing the troubleshooting and maintenance costs of technicians.

[0010] Further, the calculation of the fin efficiency according to the structural parameters and the surface efficiency is specifically as follows:

[0011] The structural parameters include fin parameters;

[0012] Obtain the fin parameters and the surface efficiency, and convert the surface efficiency η 0 to the fin efficiency η f :

[0013]

[0014] where x is the inner distance of the fin and y is the inner height of the fin; the fin parameters include the inner distance and the inner height.

[0015] Further, the obtaining of the corrosion equivalent of the corrosion scale layer in the radiator to be measured according to the heat dissipation form of the fins and the fin efficiency is specifically as follows:

[0016] Set the heat dissipation form of the fin to one-dimensional heat conduction, obtain the analytical solution of the fin efficiency according to the heat dissipation form, and calculate the equivalent thermal resistance of the corrosion scale layer according to the analytical solution;

[0017] Calculate the corrosion equivalent according to the equivalent thermal resistance and the preset thermal conductivity of the corrosion scale layer. Implementing the embodiments of the present application, setting the heat dissipation of the fin to one-dimensional heat conduction effectively simplifies the process of obtaining the equivalent thermal resistance, thereby calculating the corrosion equivalent of the corrosion scale layer, making the steps of obtaining the corrosion degree of the radiator more concise and effective.

[0018] Further, the obtaining of the air-side heat transfer coefficient and the total heat transfer area of the fins of the radiator to be measured according to the structural parameters, the operation data and the air parameters is specifically as follows:

[0019] The operating parameters include the fin heat transfer factor and the air volume of the forced convection fan, the structural parameters include the fin parameters, and the air parameters include the Prandtl number and the specific heat capacity at constant pressure on the air side of the fin;

[0020] Based on the fin heat transfer factor, in combination with the Prandtl number, the specific heat capacity at constant pressure, and the air volume of the forced convection fan, the heat transfer coefficient on the air side of the fin is calculated;

[0021] Based on the fin parameters, the total heat transfer area of the fin is obtained.

[0022] Further, the obtaining of the total heat transfer area of the fin based on the fin parameters is specifically as follows:

[0023] The fin parameters include the length L, width B, number of channel layers n, inner distance x, pitch s, inner height y, and thickness δ of the fin;

[0024] Based on the following formula, the total heat transfer area F of the fin is calculated and obtained:

[0025]

[0026] Among them, the inner distance of the fin is the difference between the pitch and the thickness. Implementing the embodiments of the present application, calculating the total heat transfer area of the fin comprehensively considers multiple parameters of the fin, including length, width, number of channel layers, inner distance, pitch, inner height, and thickness, and the obtained total heat transfer area is more accurate.

[0027] Further, the obtaining of the surface efficiency of the radiator to be measured based on the air parameters and the fluid parameters, in combination with the total heat transfer area and the heat transfer coefficient on the air side, is specifically as follows:

[0028] The fluid parameters include the specific heat capacity at constant pressure c p of the fluid on the fluid side of the radiator, the fluid flow rate q m,h , the fluid inlet temperature t h,in , the fluid outlet temperature t h,out ; the air parameters include the ambient temperature t a ;

[0029] Based on the fluid parameters and the air parameters, in combination with the heat transfer coefficient α on the air side and the total heat transfer area F, the surface efficiency η of the radiator to be measured is calculated and obtained 0 :

[0030]

[0031] Among them, t c is the average temperature of the fin, and t a is the ambient temperature.

[0032] Correspondingly, an embodiment of the present invention further provides a measuring device for the corrosion degree of a radiator, including a first acquisition module, a second acquisition module, a surface efficiency acquisition module, and a measurement module; wherein,

[0033] The first acquisition module is configured to acquire the air parameters, structural parameters of the radiator to be measured, and the historical trouble-free operation parameters of the same type of radiator; wherein, the historical trouble-free operation parameters include fluid parameters and operation data;

[0034] The second acquisition module is configured to obtain the air-side heat transfer coefficient and the total heat transfer area of the fins of the radiator to be measured according to the structural parameters, the operation data, and the air parameters;

[0035] The surface efficiency acquisition module is configured to obtain the surface efficiency of the radiator to be measured according to the air parameters and the fluid parameters, in combination with the total heat transfer area and the air-side heat transfer coefficient;

[0036] The measurement module is configured to calculate the fin efficiency of the radiator to be measured according to the structural parameters and the surface efficiency, and obtain the corrosion equivalent of the corrosion scale layer in the radiator to be measured according to the heat dissipation form of the fins and the fin efficiency, so as to obtain the measurement result of the corrosion degree of the radiator to be measured.

[0037] Further, the measurement module calculates the fin efficiency according to the structural parameters and the surface efficiency, specifically as follows:

[0038] The structural parameters include fin parameters;

[0039] The measurement module acquires the fin parameters and the surface efficiency, and converts the surface efficiency η 0 into the fin efficiency η f :

[0040]

[0041] wherein, x is the inner pitch of the fins, y is the inner height of the fins; the fin parameters include the inner pitch and the inner height.

[0042] Further, the measurement module obtains the corrosion equivalent of the corrosion scale layer in the radiator to be measured according to the heat dissipation form of the fins and the fin efficiency, specifically as follows:

[0043] The measurement module sets the heat dissipation form of the fins as one-dimensional heat conduction, obtains the analytical solution of the fin efficiency according to the heat dissipation form, and calculates the equivalent thermal resistance of the corrosion scale layer according to the analytical solution;

[0044] According to the equivalent thermal resistance and the preset thermal conductivity of the corrosion scale layer, the corrosion equivalent is calculated.

[0045] Further, the second acquisition module obtains the air-side heat transfer coefficient and the total heat transfer area of the fins of the radiator to be measured according to the structural parameters, the operating data, and the air parameters. Specifically:

[0046] The operating parameters include the fin heat transfer factor and the air volume of the forced convection fan. The structural parameters include fin parameters. The air parameters include the Prandtl number and the specific heat capacity at constant pressure on the air side of the fins.

[0047] The second acquisition module calculates the air-side heat transfer coefficient of the fins according to the fin heat transfer factor, in combination with the Prandtl number, the specific heat capacity at constant pressure, and the air volume of the forced convection fan.

[0048] The total heat transfer area of the fins is obtained according to the fin parameters. Description of the Drawings

[0049] Figure 1 : A flowchart of an embodiment of a method for measuring the corrosion degree of a radiator provided by the present invention.

[0050] Figure 2 : A structural diagram of the fins of a radiator provided by the present invention.

[0051] Figure 3 : A structural diagram of an embodiment of a device for measuring the corrosion degree of a radiator provided by the present invention. Detailed Embodiment

[0052] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0053] Embodiment 1:

[0054] Please refer to Figure 1 , Figure 1 A method for measuring the corrosion degree of a radiator provided by an embodiment of the present invention, including steps S1 to S4, where

[0055] Step S1, obtain the air parameters, structural parameters of the radiator to be measured, and the historical fault-free operation parameters of the same type of radiator; where the historical fault-free operation parameters include fluid parameters and operating data.

[0056] Specifically, obtain the Prandtl number and specific heat capacity at constant pressure on the fin air side of the radiator to be tested. The Prandtl number can be obtained directly or by querying the air thermodynamic property table to obtain the dynamic viscosity, density, thermal conductivity, etc. on the fin air side, and then calculated based on these parameters. At the same time, the Reynolds number can also be calculated. The structural parameters include the fin parameters of the radiator to be tested, and the fin parameters include but are not limited to the length, width, number of channel layers, inner distance, spacing, inner height, and thickness of the fin, etc., which are mainly used to calculate the heat conduction area of the fin in the subsequent steps. In addition, since it is necessary to judge the corrosion degree based on the real-time operation data of the radiator to be tested, it is also necessary to obtain the operation parameters under the historical fault-free conditions of the same type of radiator as a reference (mainly the fault-free data for 3 months, which is "historical fault-free operation parameters" in this embodiment), which are used to construct a corrosion degree evaluation model. These historical fault-free operation parameters are mainly fluid parameters and operation data. The fluid parameters include but are not limited to the fluid specific heat capacity at constant pressure, fluid flow rate, fluid inlet temperature, and fluid outlet temperature on the fluid side of the radiator. The operation data mainly includes the fin heat transfer factor of the radiator (which can be obtained by querying the radiator data based on the Reynolds number) and the air volume of the forced heat exchange fan.

[0057] Step S2, obtain the air-side heat transfer coefficient and total heat transfer area of the fins of the radiator to be tested according to the structural parameters, the operation data, and the air parameters.

[0058] In this embodiment, according to the fin heat transfer factor j, combined with the Prandtl number Pr and the specific heat capacity at constant pressure c p,c and the air volume q of the forced heat exchange fan m,c , calculate the air-side heat transfer coefficient α of the fin:

[0059] α = j·c p,c q m,c Pr 3 / 2 ;

[0060] Among them, the air volume q of the forced heat exchange fan m,c can be replaced by the product of the average wind speed between the radiator fins and the effective area of the radiator.

[0061] Furthermore, obtain the total heat transfer area F of the fin. In this embodiment, taking the plate-fin radiator as an example, the method for obtaining the total heat transfer area F is described:

[0062]

[0063] Refer to Figure 2, where L is the fin length, B is the fin width, n is the number of channel layers, x is the inner fin distance, s is the fin pitch, y is the inner height of the fin, and δ is the fin thickness; the inner fin distance is the difference between the pitch and the thickness, and these fin parameters can all be obtained from the radiator specification or actual measurement.

[0064] Step S3, based on the air parameters and the fluid parameters, and in combination with the total heat transfer area and the air-side heat transfer coefficient, obtain the surface efficiency of the radiator to be tested.

[0065] In this embodiment, the air parameters further include the ambient temperature t a ;

[0066] Based on the fluid parameters (including the fluid constant pressure heat capacity c p of the fluid side of the radiator, the fluid flow rate q m,h , the fluid inlet temperature t h,in , the fluid outlet temperature t h,out ) and the air parameter t a , and in combination with the air-side heat transfer coefficient α and the total heat transfer area F, calculate and obtain the surface efficiency η 0 :

[0067]

[0068] where t c is the average fin temperature, and t a is the ambient temperature; generally speaking, the inlet temperature, outlet temperature in the fluid parameters, and the ambient temperature in the air parameters can be measured by temperature sensors built in the radiator.

[0069] Step S4, based on the structural parameters and the surface efficiency, calculate the fin efficiency of the radiator to be tested, and based on the heat dissipation form of the fin and the fin efficiency, obtain the corrosion equivalent of the corrosion scale layer inside the radiator to be tested, so as to obtain the measurement result of the corrosion degree of the radiator to be tested.

[0070] In this embodiment, for clearer illustration, taking a plate-fin radiator as an example, convert the surface efficiency η 0 to the fin efficiency η f :

[0071]

[0072] where x is the inner fin distance of the fin, and y is the inner height of the fin; the fin parameters include the inner distance and the inner height.

[0073] Set the heat dissipation form of the fin to one-dimensional heat conduction, obtain the analytical solution of the fin efficiency according to the heat dissipation form, and calculate the equivalent thermal resistance of the corrosion scale layer according to the analytical solution. Such a setting is beneficial to simplify the calculation process of the equivalent thermal resistance and make the evaluation of the radiator from above more concise and accurate.

[0074] Calculate the corrosion equivalent according to the equivalent thermal resistance and the preset thermal conductivity of the corrosion scale layer.

[0075] Specifically, the analytical solution of the fin efficiency:

[0076]

[0077] Among them,

[0078]

[0079]

[0080] Among them, L is the fin length, P·L is the dimensionless fin height, and λ f is the thermal conductivity of the fin.

[0081] It should be noted that in this embodiment, the preset value of the thermal conductivity of the corrosion scale layer is λ r = 0.8 W / (m·K), so the corrosion equivalent can be obtained:

[0082] δ r = r / λ r ;

[0083] Thus, the measurement result of the corrosion degree of the radiator to be measured is obtained. The corrosion equivalent effectively reflects the corrosion degree of the radiator to be measured, can reduce the number of unplanned maintenance times, ensure the operation reliability, safety and economy of the equipment, and thus reduce the maintenance cost of the radiator.

[0084] Correspondingly, as an example of this embodiment, referring to Figure 3 , the embodiment of the present invention also provides a device for measuring the corrosion degree of a radiator, including a first acquisition module 101, a second acquisition module 102, a surface efficiency acquisition module 103 and a measurement module 104; among them,

[0085] The first acquisition module 101 is used to acquire the air parameters, structural parameters of the radiator to be measured and the historical fault-free operation parameters of the same type of radiator; among them, the historical fault-free operation parameters include fluid parameters and operation data;

[0086] The second acquisition module 102 is used to obtain the air-side heat transfer coefficient and the total heat transfer area of the fins of the radiator to be measured according to the structural parameters, the operation data and the air parameters.

[0087] The surface efficiency acquisition module 103 is configured to obtain the surface efficiency of the radiator to be measured according to the air parameters and the fluid parameters, in combination with the total heat transfer area and the air-side heat transfer coefficient.

[0088] The measurement module 104 is configured to calculate the fin efficiency of the radiator to be measured according to the structural parameters and the surface efficiency, and obtain the corrosion equivalent of the corrosion scale layer in the radiator to be measured according to the heat dissipation form of the fins and the fin efficiency, so as to obtain the measurement result of the corrosion degree of the radiator to be measured.

[0089] In this embodiment, the measurement module 104 calculates the fin efficiency according to the structural parameters and the surface efficiency, specifically:

[0090] The structural parameters include the fin parameters;

[0091] The measurement module 104 obtains the fin parameters and the surface efficiency, and converts the surface efficiency η 0 into the fin efficiency η f :

[0092]

[0093] where x is the inner pitch of the fins, y is the inner height of the fins; the fin parameters include the inner pitch and the inner height.

[0094] In this embodiment, the measurement module 104 obtains the corrosion equivalent of the corrosion scale layer in the radiator to be measured according to the heat dissipation form of the fins and the fin efficiency, specifically:

[0095] The measurement module 104 sets the heat dissipation form of the fins to one-dimensional heat conduction, obtains the analytical solution of the fin efficiency according to the heat dissipation form, and calculates the equivalent thermal resistance of the corrosion scale layer according to the analytical solution;

[0096] The corrosion equivalent is calculated according to the equivalent thermal resistance and the preset thermal conductivity of the corrosion scale layer.

[0097] In this embodiment, the second acquisition module 102 obtains the air-side heat transfer coefficient and the total heat transfer area of the fins of the radiator to be measured according to the structural parameters, the operation data and the air parameters, specifically:

[0098] The operation parameters include the fin heat transfer factor and the air volume of the forced convection fan, the structural parameters include the fin parameters, and the air parameters include the Prandtl number and the specific heat capacity at constant pressure on the air side of the fins;

[0099] The second acquisition module 102 calculates the air-side heat transfer coefficient of the fin based on the fin heat transfer factor, in combination with the Prandtl number, the specific heat capacity at constant pressure, and the air volume of the forced convection fan.

[0100] According to the fin parameters, the total heat transfer area of the fin is obtained.

[0101] Exemplarily, as another example of this embodiment, this embodiment also provides a measuring device for the corrosion degree of a radiator. This device is applied to an application scenario different from the previous example and includes a storage module, an acquisition module, and a calculation and processing module. Among them,

[0102] The storage module is used to store the structural parameters of the radiator to be measured, the physical property tables of air and cooling medium fluids, historical trouble-free operation data, corrosion equivalent calculation results, etc. Among them, the historical trouble-free operation parameters include fluid parameters and operation data; the structural parameters include the size parameters and total heat transfer area of the radiator to be measured, etc.

[0103] The acquisition module is used to acquire the air parameters of the radiator to be measured and the real-time operation data. The operation data includes, but is not limited to, air and cooling medium fluid parameters, radiator fin temperature, etc.

[0104] The calculation and processing module is used to obtain the physical property parameter data of air and fluid by using the difference calculation method according to the air parameters and the fluid parameters, and in combination with structural parameters such as the total heat transfer area of the radiator, calculate the air-side heat transfer coefficient, and then obtain the surface efficiency of the radiator to be measured, convert to obtain the fin efficiency of the radiator to be measured, and finally obtain the corrosion equivalent of the corrosion scale layer inside the radiator to be measured to quantitatively characterize the corrosion degree of the radiator to be measured.

[0105] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0106] An embodiment of the present invention provides a method and device for measuring the corrosion degree of a radiator. The method includes: obtaining the air parameters, structural parameters of the radiator to be measured, and the historical fault-free operation parameters of the same type of radiator; wherein, the historical fault-free operation parameters include fluid parameters and operation data; obtaining the air-side heat transfer coefficient and the total heat transfer area of the fins of the radiator to be measured according to the structural parameters, the operation data, and the air parameters; obtaining the surface efficiency of the radiator to be measured according to the air parameters and the fluid parameters, in combination with the total heat transfer area and the air-side heat transfer coefficient; calculating the fin efficiency of the radiator to be measured according to the structural parameters and the surface efficiency, and obtaining the corrosion equivalent of the corrosion scale layer in the radiator to be measured according to the heat dissipation form of the fins and the fin efficiency, so as to obtain the measurement result of the corrosion degree of the radiator to be measured. Compared with the prior art, the present invention can measure the air-side heat transfer coefficient of the radiator fins in real time through the air parameters, structural parameters of the radiator, and the historical fault-free operation parameters of the same type of radiator, and obtain the surface efficiency of the radiator to be measured in combination with the total heat transfer area of the fins, thereby obtaining the fin efficiency, measuring the corrosion equivalent of the corrosion scale layer in the radiator to be measured, and measuring the corrosion degree of the radiator in real time according to the efficiency of the radiator and the air environment conditions, without affecting the operation of the radiator, improving the safety and economy of the measurement, and effectively reducing the troubleshooting and maintenance costs of technicians.

[0107] In the above specific embodiments, the purpose, technical solution, and beneficial effects of the present invention have been further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. In particular, for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for measuring the corrosion degree of a radiator, characterized in that, comprising: acquiring the air parameters, structural parameters of the radiator to be measured, and the historical fault - free operation parameters of the same type of radiator; wherein, the historical fault - free operation parameters include fluid parameters and operation data; obtaining the air - side heat transfer coefficient and the total heat transfer area of the fins of the radiator to be measured according to the structural parameters, the operation data, and the air parameters; obtaining the surface efficiency of the radiator to be measured according to the air parameters and the fluid parameters, in combination with the total heat transfer area and the air - side heat transfer coefficient; calculating the fin efficiency of the radiator to be measured according to the structural parameters and the surface efficiency, and obtaining the corrosion equivalent of the corrosion scale layer inside the radiator to be measured according to the heat dissipation form of the fins and the fin efficiency, so as to obtain the measurement result of the corrosion degree of the radiator to be measured; The calculating the fin efficiency according to the structural parameters and the surface efficiency is specifically: The structural parameters include fin parameters; Obtain the fin parameters and the surface efficiency, and convert the surface efficiency to fin efficiency : ； wherein, x is the inner distance of the fins, y is the inner height of the fins; the fin parameters include the inner distance and the inner height; The obtaining the corrosion equivalent of the corrosion scale layer inside the radiator to be measured according to the heat dissipation form of the fins and the fin efficiency is specifically: assuming the heat dissipation form of the fins is one - dimensional heat conduction, obtaining the analytical solution of the fin efficiency according to the heat dissipation form, and calculating the equivalent thermal resistance of the corrosion scale layer according to the analytical solution; calculating the corrosion equivalent according to the equivalent thermal resistance and the preset thermal conductivity of the corrosion scale layer.

2. The method for measuring the corrosion degree of a radiator according to claim 1, characterized in that, The obtaining the air - side heat transfer coefficient and the total heat transfer area of the fins of the radiator to be measured according to the structural parameters, the operation data, and the air parameters is specifically: The operation parameters include the fin heat transfer factor and the air volume of the forced - convection fan, the structural parameters include fin parameters, and the air parameters include the Prandtl number and the specific heat capacity at constant pressure on the air - side of the fins; calculating the air - side heat transfer coefficient of the fins according to the fin heat transfer factor, in combination with the Prandtl number, the specific heat capacity at constant pressure, and the air volume of the forced - convection fan; obtaining the total heat transfer area of the fins according to the fin parameters.

3. The method for measuring the corrosion degree of a radiator according to claim 2, characterized in that, The obtaining the total heat transfer area of the fins according to the fin parameters is specifically: The fin parameters include the length L, width B, number of channel layers n, inner distance x, pitch s, inner height y, and thickness of the fin ; calculating to obtain the total heat transfer area F of the fins according to the following formula: ； wherein, the inner distance of the fins is the difference between the pitch and the thickness.

4. The method for measuring the corrosion degree of a radiator according to any one of claims 1 to 3, characterized in that, The obtaining the surface efficiency of the radiator to be measured according to the air parameters and the fluid parameters, in combination with the total heat transfer area and the air - side heat transfer coefficient is specifically: The fluid parameters include the fluid constant-pressure heat capacity on the fluid side of the radiator , the fluid flow rate , the fluid inlet temperature , the fluid outlet temperature ; the air parameters include the ambient temperature ; Based on the fluid parameters and the air parameters, in combination with the air-side heat transfer coefficient and the total heat transfer area F, calculate the surface efficiency of the radiator to be measured : ； Among them, is the average fin temperature, is the ambient temperature.

5. A device for measuring the corrosion degree of a radiator, characterized in that, comprising a first acquisition module, a second acquisition module, a surface efficiency acquisition module, and a measurement module; wherein, The first acquisition module is configured to acquire the air parameters, structural parameters of the radiator to be measured, and the historical fault-free operation parameters of the same type of radiator; wherein, the historical fault-free operation parameters include fluid parameters and operation data; The second acquisition module is configured to obtain the air-side heat transfer coefficient and the total heat transfer area of the fins of the radiator to be measured according to the structural parameters, the operation data, and the air parameters; The surface efficiency acquisition module is configured to obtain the surface efficiency of the radiator to be measured according to the air parameters and the fluid parameters, in combination with the total heat transfer area and the air-side heat transfer coefficient; The measurement module is configured to calculate the fin efficiency of the radiator to be measured according to the structural parameters and the surface efficiency, and obtain the corrosion equivalent of the corrosion scale layer in the radiator to be measured according to the heat dissipation form of the fins and the fin efficiency, so as to obtain the measurement result of the corrosion degree of the radiator to be measured; The measurement module calculates the fin efficiency according to the structural parameters and the surface efficiency, specifically: The structural parameters include fin parameters; The measurement module obtains the fin parameters and the surface efficiency, and converts the surface efficiency into fin efficiency : ； Wherein, x is the inner distance of the fins, y is the inner height of the fins; the fin parameters include the inner distance and the inner height; The measurement module obtains the corrosion equivalent of the corrosion scale layer in the radiator to be measured according to the heat dissipation form of the fins and the fin efficiency, specifically: The measurement module sets the heat dissipation form of the fins as one-dimensional heat conduction, obtains the analytical solution of the fin efficiency according to the heat dissipation form, and calculates the equivalent thermal resistance of the corrosion scale layer according to the analytical solution; The corrosion equivalent is calculated according to the equivalent thermal resistance and the preset thermal conductivity of the corrosion scale layer.

6. The measuring device for the corrosion degree of a radiator according to claim 5, characterized in that, The second acquisition module obtains the air-side heat transfer coefficient and the total heat transfer area of the fins of the radiator to be measured according to the structural parameters, the operation data, and the air parameters, specifically: The operation parameters include the fin heat transfer factor and the air volume of the forced convection fan, the structural parameters include fin parameters, and the air parameters include the Prandtl number and the specific heat capacity at constant pressure on the air side of the fins; The second acquisition module calculates the air-side heat transfer coefficient of the fins according to the fin heat transfer factor, in combination with the Prandtl number, the specific heat capacity at constant pressure, and the air volume of the forced convection fan; The total heat transfer area of the fins is obtained according to the fin parameters.

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