An air-cooled tower performance monitoring method, device, electronic device and storage medium

Abstract

The present application provides a method, apparatus, electronic device and storage medium for monitoring the performance of an indirect cooling tower. The method includes: obtaining the inlet and outlet air temperatures and the inlet and outlet water temperatures of each fan section in the indirect cooling tower to be measured; determining the heat dissipation of each fan section according to the inlet and outlet water temperatures and the circulating water flow rate; determining the logarithmic mean temperature difference of each fan section according to the inlet and outlet air temperatures and the inlet and outlet water temperatures; determining the heat transfer coefficient of each fan section according to the heat dissipation, logarithmic mean temperature difference and heat transfer area of each fan section; and determining the performance monitoring result of the indirect cooling tower to be measured according to the heat transfer coefficients of each fan section. The method provided by the above solution determines the heat transfer coefficient of each fan section by obtaining the inlet and outlet air temperatures and the inlet and outlet water temperatures of each fan section in the indirect cooling tower to be measured in real time, and further determines the performance monitoring result of the indirect cooling tower to be measured, ensuring that the obtained performance monitoring result conforms to the actual heat dissipation situation of the indirect cooling tower and improving the accuracy of the performance monitoring result of the indirect cooling tower.

Description

Technical Field

[0001] The present application relates to the technical field of indirect cooling tower management, and particularly to a method, device, electronic device and storage medium for monitoring the performance of an indirect cooling tower. Background Art

[0002] Currently, indirect cooling towers have been widely used in water-scarce areas due to their advantages of good operating economy and low noise. Among them, the cleaning frequency of the indirect cooling tower depends on the heat transfer performance of the indirect cooling tower. Therefore, how to determine the heat transfer performance of the indirect cooling tower has become the focus of research.

[0003] In the prior art, the heat transfer performance of the indirect cooling tower is usually determined according to the experimental heat dissipation coefficient and the corresponding reduction coefficient of the air-cooled tube bundle of the indirect cooling tower when it leaves the factory.

[0004] However, since the indirect cooling tower is exposed to the air, its heat transfer performance is easily affected by dirt. Therefore, the accuracy of the determination result of the heat transfer performance of the indirect cooling tower obtained by the prior art is low and does not conform to the actual heat dissipation situation of the indirect cooling tower. Summary of the Invention

[0005] The present application provides a method, device, electronic device and storage medium for monitoring the performance of an indirect cooling tower to solve the defects such as low accuracy of the monitoring result of the performance of the indirect cooling tower in the prior art.

[0006] The first aspect of the present application provides a method for monitoring the performance of an indirect cooling tower, including:

[0007] Obtaining the inlet and outlet air temperatures and the inlet and outlet water temperatures of each fan section in the indirect cooling tower to be measured;

[0008] Determining the heat dissipation of each fan section according to the inlet and outlet water temperatures and the circulating water flow rate;

[0009] Determining the logarithmic mean temperature difference of each fan section according to the inlet and outlet air temperatures and the inlet and outlet water temperatures;

[0010] Determining the heat transfer coefficient of each fan section according to the heat dissipation, logarithmic mean temperature difference and heat transfer area of each fan section;

[0011] Determining the performance monitoring result of the indirect cooling tower to be measured according to the heat transfer coefficients of each fan section.

[0012] Optionally, it further includes:

[0013] Determining the average value of the inlet and outlet air temperatures of the indirect cooling tower to be measured according to the average value calculation result of the inlet and outlet air temperatures of each fan section;

[0014] Determining the air density change information of the indirect cooling tower to be measured during inlet and outlet air according to the average value of the inlet and outlet air temperatures of the indirect cooling tower to be measured and the locally measured atmospheric pressure;

[0015] Determine the lift value of the to-be-tested indirect cooling tower in the air according to the air density change information, the effective height of the to-be-tested indirect cooling tower, and the acceleration due to gravity;

[0016] Based on the equivalent relationship between the lift value and the drag value of the to-be-tested indirect cooling tower in the air, determine the drag value of the to-be-tested indirect cooling tower in the air according to the lift value of the to-be-tested indirect cooling tower in the air.

[0017] Optionally, it includes:

[0018] Determine the characteristic air temperature of the to-be-tested indirect cooling tower according to the average inlet and outlet air temperatures of the to-be-tested indirect cooling tower;

[0019] Determine the characteristic air density of the to-be-tested indirect cooling tower according to the characteristic air temperature of the to-be-tested indirect cooling tower and the locally measured atmospheric pressure;

[0020] Determine the ventilation volume of each fan section according to the characteristic air density of the to-be-tested indirect cooling tower, the heat dissipation of each fan section, and the inlet and outlet air temperatures;

[0021] Determine the windward wind speed of each fan section according to the ventilation volume and heat dissipation area of each fan section;

[0022] For any one of the fan sections, when the windward wind speed of the fan section reaches a preset standard, determine whether the fan section is a fan section to be cleaned according to the relationship between the heat transfer coefficient of the fan section and a preset threshold value.

[0023] Optionally, multiple temperature sensors are provided on the finned tubes of each fan section of the to-be-tested indirect cooling tower, and the inlet and outlet air temperatures include the inlet air temperature and the outlet air temperature. Obtaining the inlet and outlet air temperatures of each fan section in the to-be-tested indirect cooling tower includes:

[0024] For any one of the fan sections, obtain the outlet air temperatures measured by the temperature sensors in the fan section;

[0025] Perform an average calculation on the outlet air temperatures measured by the temperature sensors to obtain the outlet air temperature of the fan section;

[0026] Determine the current ambient temperature as the inlet air temperature.

[0027] Optionally, the inlet and outlet water temperatures include the inlet water temperature and the outlet water temperature. Determining the heat dissipation of each fan section according to the inlet and outlet water temperatures and the circulating water flow rate includes:

[0028] Calculate the heat dissipation of each fan section based on the following formula:

[0029] Q n =q n ρ w c pw (tw2n -t w1n )

[0030] Among them, Q n represents the heat dissipation of the nth fan section, and q n represents the circulating water flow rate of the nth fan section, ρ w represents the density of the circulating water, and c pw represents the constant-pressure specific heat capacity of the circulating water, t w2n represents the outlet water temperature of the nth fan section, and t w1n represents the inlet water temperature of the nth fan section.

[0031] Optionally, determining the logarithmic heat transfer temperature difference of each of the fan sections according to the inlet and outlet air temperatures and the inlet and outlet water temperatures includes:

[0032] Calculating the logarithmic heat transfer temperature difference of each of the fan sections based on the following formula:

[0033]

[0034] Among them, Δt mn represents the logarithmic heat transfer temperature difference of the nth fan section, t w2n represents the outlet water temperature of the nth fan section, t w1n represents the inlet water temperature of the nth fan section, t a1n represents the inlet air temperature of the nth fan section, t a2n represents the outlet air temperature of the nth fan section.

[0035] Optionally, determining the heat transfer coefficient of each of the fan sections according to the heat dissipation, logarithmic heat transfer temperature difference and heat dissipation area of each of the fan sections includes:

[0036] Calculating the heat transfer coefficient of each of the fan sections based on the following formula:

[0037]

[0038] Among them, k n represents the heat transfer coefficient of the nth fan section, Q n represents the heat dissipation of the nth fan section, Δt mn represents the logarithmic heat transfer temperature difference of the nth fan section, and A n represents the heat dissipation area of the nth fan section.

[0039] The second aspect of this application provides an indirect cooling tower performance monitoring device, including:

[0040] An acquisition module, configured to acquire the inlet and outlet air temperatures and the inlet and outlet water temperatures of each fan section in the indirect cooling tower to be measured;

[0041] A first determination module, which determines the heat dissipation of each of the fan sections according to the inlet and outlet water temperatures and the circulating water flow rate;

[0042] A second determination module, configured to determine the logarithmic heat transfer temperature difference of each of the fan sections according to the inlet and outlet air temperatures and the inlet and outlet water temperatures;

[0043] A third determination module, configured to determine the heat transfer coefficient of each of the fan sections according to the heat dissipation amount, the logarithmic heat transfer temperature difference, and the heat dissipation area of each of the fan sections;

[0044] A monitoring module, configured to determine the performance monitoring result of the to-be-detected indirect cooling tower according to the heat transfer coefficient of each of the fan sections.

[0045] Optionally, the device further includes:

[0046] A resistance calculation module, configured to determine the average inlet and outlet air temperatures of the to-be-detected indirect cooling tower according to the average calculation result of the inlet and outlet air temperatures of each of the fan sections; determine the air density change information of the to-be-detected indirect cooling tower during inlet and outlet air according to the average inlet and outlet air temperatures of the to-be-detected indirect cooling tower and the actually measured local atmospheric pressure; determine the lift value of the to-be-detected indirect cooling tower in the air according to the air density change information, the effective height of the to-be-detected indirect cooling tower, and the acceleration due to gravity; and determine the resistance value of the to-be-detected indirect cooling tower in the air according to the equivalent relationship between the lift value and the resistance value of the to-be-detected indirect cooling tower in the air and based on the lift value of the to-be-detected indirect cooling tower in the air.

[0047] Optionally, the device further includes:

[0048] A judgment module, configured to determine the characteristic air temperature of the to-be-detected indirect cooling tower according to the average inlet and outlet air temperatures of the to-be-detected indirect cooling tower;

[0049] Determine the characteristic air density of the to-be-detected indirect cooling tower according to the characteristic air temperature of the to-be-detected indirect cooling tower and the actually measured local atmospheric pressure;

[0050] Determine the ventilation volume of each of the fan sections according to the characteristic air density of the to-be-detected indirect cooling tower, the heat dissipation amount of each of the fan sections, and the inlet and outlet air temperatures;

[0051] Determine the windward wind speed of each of the fan sections according to the ventilation volume and the heat dissipation area of each of the fan sections;

[0052] For any one of the fan sections, when the windward wind speed of the fan section reaches a preset standard, determine whether the fan section is a fan section to be cleaned according to the relationship between the heat transfer coefficient of the fan section and a preset threshold value.

[0053] Optionally, a plurality of temperature sensors are provided on the finned tubes of each fan section of the to-be-detected indirect cooling tower, and the inlet and outlet air temperatures include the inlet air temperature and the outlet air temperature. The acquisition module is specifically configured to:

[0054] For any one of the said fan segments, obtain the outlet air temperature measured by each temperature sensor in this segment;

[0055] Calculate the average value of the outlet air temperatures measured by each of the said temperature sensors to obtain the outlet air temperature of this segment;

[0056] Determine the current ambient temperature as the inlet air temperature.

[0057] Optionally, the inlet and outlet water temperatures include the inlet water temperature and the outlet water temperature. The first determination module is specifically used for:

[0058] Calculate the heat dissipation of each of the said fan segments based on the following formula:

[0059] Q n =q n ρ w c pw (t w2n -t w1n )

[0060] where Q n represents the heat dissipation of the nth fan segment, q n represents the circulating water flow rate of the nth fan segment, ρ w represents the circulating water density, c pw represents the constant pressure specific heat capacity of the circulating water, t w2n represents the outlet water temperature of the nth fan segment, t w1n represents the inlet water temperature of the nth fan segment.

[0061] Optionally, the second determination module is specifically used for:

[0062] Calculate the logarithmic mean temperature difference of each of the said fan segments based on the following formula:

[0063]

[0064] where Δt mn represents the logarithmic mean temperature difference of the nth fan segment, t w2n represents the outlet water temperature of the nth fan segment, t w1n represents the inlet water temperature of the nth fan segment, t a1n represents the inlet air temperature of the nth fan segment, t a2n represents the outlet air temperature of the nth fan segment.

[0065] Optionally, the third determination module is specifically used for:

[0066] Calculate the heat transfer coefficient of each of the said fan segments based on the following formula:

[0067]

[0068] where kn represents the heat transfer coefficient of the nth sector segment, Q n represents the heat dissipation of the nth sector segment, Δt mn represents the logarithmic mean temperature difference of heat transfer of the nth sector segment, A n represents the heat dissipation area of the nth sector segment.

[0069] The third aspect of the present application provides an electronic device, including: at least one processor and a memory;

[0070] The memory stores computer-executable instructions;

[0071] The at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor executes the method described in the first aspect above and various possible designs of the first aspect.

[0072] The fourth aspect of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the method described in the first aspect above and various possible designs of the first aspect is implemented.

[0073] The technical solution of the present application has the following advantages:

[0074] The present application provides a method, device, electronic device and storage medium for monitoring the performance of an indirect cooling tower. The method includes: obtaining the inlet and outlet air temperatures and inlet and outlet water temperatures of each sector segment in the indirect cooling tower to be measured; determining the heat dissipation of each sector segment according to the inlet and outlet water temperatures and the circulating water flow rate; determining the logarithmic mean temperature difference of heat transfer of each sector segment according to the inlet and outlet air temperatures and the inlet and outlet water temperatures; determining the heat transfer coefficient of each sector segment according to the heat dissipation, logarithmic mean temperature difference of heat transfer and heat dissipation area of each sector segment; and determining the performance monitoring result of the indirect cooling tower to be measured according to the heat transfer coefficient of each sector segment. The method provided by the above solution determines the heat transfer coefficient of each sector segment by obtaining the inlet and outlet air temperatures and inlet and outlet water temperatures of each sector segment in the indirect cooling tower to be measured in real time, and then determines the performance monitoring result of the indirect cooling tower to be measured, ensuring that the obtained performance monitoring result conforms to the actual heat dissipation situation of the indirect cooling tower and improving the accuracy of the performance monitoring result of the indirect cooling tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application, and those of ordinary skill in the art can also obtain other drawings according to these drawings.

[0076] Figure 1 is a schematic structural diagram of the indirect cooling tower performance monitoring system based on the embodiment of the present application;

[0077] Figure 2 It is a schematic flow chart of the indirect cooling tower performance monitoring method provided by the embodiments of the present application;

[0078] Figure 3 It is a schematic structural diagram of the indirect cooling tower performance monitoring device provided by the embodiments of the present application;

[0079] Figure 4 It is a schematic structural diagram of the electronic device provided by the embodiments of the present application.

[0080] Through the above-mentioned drawings, the clear embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and text descriptions are not intended to limit the scope of the concept of the present disclosure in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0081] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0082] In addition, terms such as "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the descriptions of the following embodiments, "a plurality of" means more than two, unless otherwise specifically defined.

[0083] In the prior art, the heat transfer performance of the indirect cooling tower is usually determined according to the experimental heat transfer coefficient and the corresponding reduction coefficient of the air-cooled tube bundle of the indirect cooling tower at the time of factory. However, since the indirect cooling tower is exposed to the air, its heat transfer performance is easily affected by dirt. There are many fan segments in the indirect cooling tower (8 - 12), and due to manufacturing and installation reasons, the heat transfer coefficients of each fan segment are not the same. Using the same unchanging thermal resistance experimental value will result in low accuracy in monitoring the heat transfer performance of the indirect cooling tower, and insufficient guidance for the optimal operation and cleaning frequency of the indirect cooling tower.

[0084] In view of the above problems, the intercooling tower performance monitoring method, device, electronic device and storage medium provided by the embodiments of the present application obtain the inlet and outlet air temperatures and the inlet and outlet water temperatures of each fan section in the intercooling tower to be measured; determine the heat dissipation of each fan section according to the inlet and outlet water temperatures and the circulating water flow rate; determine the logarithmic mean temperature difference of each fan section according to the inlet and outlet air temperatures and the inlet and outlet water temperatures; determine the heat transfer coefficient of each fan section according to the heat dissipation, logarithmic mean temperature difference and heat transfer area of each fan section; and determine the performance monitoring result of the intercooling tower to be measured according to the heat transfer coefficient of each fan section. The method provided by the above solution determines the heat transfer coefficient of each fan section by according to the inlet and outlet air temperatures and the inlet and outlet water temperatures of each fan section in the intercooling tower to be measured obtained in real time, and then determines the performance monitoring result of the intercooling tower to be measured, ensuring that the obtained performance monitoring result conforms to the actual heat dissipation situation of the intercooling tower and improving the accuracy of the intercooling tower performance monitoring result.

[0085] The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0086] First, the structure of the intercooling tower performance monitoring system based on the present application will be described:

[0087] The intercooling tower performance monitoring method, device, electronic device and storage medium provided by the embodiments of the present application are applicable to detecting the heat transfer performance of the intercooling tower. As Figure 1 shown, it is a schematic structural diagram of the intercooling tower performance monitoring system based on the embodiments of the present application, mainly including an intercooling tower, a data acquisition device and an electronic device deployed with an intercooling tower performance monitoring device. Specifically, the inlet and outlet air temperatures and the inlet and outlet water temperatures of each fan section in the intercooling tower can be collected based on the data acquisition device, and the collected information is sent to the electronic device. Based on the intercooling tower performance monitoring device, the electronic device determines the performance monitoring result of the intercooling tower according to the received information.

[0088] The embodiments of the present application provide an intercooling tower performance monitoring method for detecting the heat transfer performance of the intercooling tower. The execution subject of the embodiments of the present application is an electronic device, such as a server, a desktop computer, a laptop computer, a tablet computer and other electronic devices that can be used to detect the heat transfer performance of the intercooling tower.

[0089] As Figure 2 shown, it is a schematic flow chart of the intercooling tower performance monitoring method provided by the embodiments of the present application, and the method includes:

[0090] Step 201, obtain the inlet and outlet air temperatures and the inlet and outlet water temperatures of each fan section in the intercooling tower to be measured.

[0091] Among them, multiple temperature sensors are provided for the finned tubes of each fan section of the indirect cooling tower to be measured, and the inlet and outlet air temperatures include the inlet air temperature and the outlet air temperature.

[0092] Specifically, in one embodiment, for any fan section, obtain the outlet air temperature measured by each temperature sensor in this fan section; calculate the average value of the outlet air temperatures measured by each temperature sensor to obtain the outlet air temperature of this fan section; determine the current ambient temperature as the inlet air temperature.

[0093] Specifically, m measuring points can be set on the finned tubes of each fan section, and one temperature sensor is set at each measuring point. Among them, in order to ensure the reliability of the data, m = 5 can be set, and then the actual outlet air temperature of this fan section can be determined according to the average value calculation result of the outlet air temperatures measured by each temperature sensor.

[0094] Correspondingly, water temperature sensors can be set at the water outlet and water inlet of the fan section to measure the circulating water inlet temperature and the circulating water outlet temperature of this fan section at the current moment based on the water temperature sensors.

[0095] Among them, since the inlet air temperature of each fan section of the indirect cooling tower is the same, the current ambient temperature at the location of the indirect cooling tower can be directly determined as the inlet air temperature of each fan section.

[0096] Step 202, determine the heat dissipation of each fan section according to the inlet and outlet water temperatures and the circulating water flow rate.

[0097] Specifically, the inlet and outlet water temperatures include the inlet water temperature and the outlet water temperature. The heat dissipation of this fan section in terms of water cooling performance can be determined according to the temperature difference between the outlet water temperature and the inlet water temperature of the fan section and the circulating water flow rate. Among them, the flow rate of the circulating water can be detected based on a preset flow sensor.

[0098] Specifically, in one embodiment, the heat dissipation Q of each fan section can be calculated based on the following formula n :

[0099] Q n = q n ρ w c pw (t w2n -t w1n )

[0100] Among them, Q n represents the heat dissipation of the nth fan section, q n represents the circulating water flow rate of the nth fan section, ρ w represents the circulating water density, c pw represents the circulating water specific heat capacity at constant pressure, t w2n represents the outlet water temperature of the nth fan section, t w1n represents the inlet water temperature of the nth fan section.

[0101] It should be noted that recycled water usually adopts available wastewater or groundwater, etc. The density of recycled water can be treated as a constant, and the constant pressure specific heat capacity of recycled water is usually taken as 4.18 kJ / (kg·°C).

[0102] Step 203: Determine the logarithmic mean temperature difference of each fan section according to the inlet and outlet air temperatures and the inlet and outlet water temperatures.

[0103] Among them, the logarithmic mean temperature difference is used to characterize the overall heat transfer performance of the fan section.

[0104] Specifically, in one embodiment, the logarithmic mean temperature difference Δt of each fan section can be calculated based on the following formula mn :

[0105]

[0106] Among them, Δt mn represents the logarithmic mean temperature difference of the nth fan section, t w2n represents the outlet water temperature of the nth fan section, t w1n represents the inlet water temperature of the nth fan section, t a1n represents the inlet air temperature of the nth fan section, t a2n represents the outlet air temperature of the nth fan section.

[0107] Step 204: Determine the heat transfer coefficient of each fan section according to the heat dissipation amount, logarithmic mean temperature difference and heat dissipation area of each fan section.

[0108] Among them, the heat dissipation area of the fan section is the area of the fan section. The larger the heat dissipation area of the fan section, the larger the corresponding heat dissipation amount and logarithmic mean temperature difference. Therefore, the specific heat transfer performance of the fan section needs to be analyzed in combination with its heat dissipation area.

[0109] Specifically, in one embodiment, the heat transfer coefficient k of each fan section can be calculated based on the following formula n :

[0110]

[0111] Among them, k n represents the heat transfer coefficient of the nth fan section, Q n represents the heat dissipation amount of the nth fan section, Δt mn represents the logarithmic mean temperature difference of the nth fan section, A n represents the heat dissipation area of the nth fan section.

[0112] Step 205: Determine the performance monitoring result of the intercooling tower to be measured according to the heat transfer coefficient of each fan section.

[0113] Specifically, the performance monitoring result of the to-be-detected indirect cooling tower can be obtained by summarizing the heat transfer coefficients of each fan segment. Among them, the performance monitoring result can be output in the form of an indirect cooling tower monitoring report.

[0114] Based on the above embodiments, since the indirect cooling tower is exposed to the air, when the surface dirtiness degree is relatively high, the heat transfer performance of the indirect cooling tower will be affected. Therefore, in order to ensure the heat transfer performance of the indirect cooling tower, as an implementable manner, in one embodiment, the method further includes:

[0115] Step 301: Determine the average inlet and outlet air temperatures of the to-be-detected indirect cooling tower according to the calculation results of the average inlet and outlet air temperatures of each fan segment.

[0116] Step 302: Determine the air density change information of the to-be-detected indirect cooling tower during inlet and outlet according to the average inlet and outlet air temperatures of the to-be-detected indirect cooling tower and the actually measured local atmospheric pressure.

[0117] Step 303: Determine the lift value of the to-be-detected indirect cooling tower in the air according to the air density change information, the effective height of the to-be-detected indirect cooling tower, and the acceleration due to gravity.

[0118] Step 304: Based on the equivalent relationship between the lift value and the resistance value of the to-be-detected indirect cooling tower in the air, determine the resistance value of the to-be-detected indirect cooling tower in the air according to the lift value of the to-be-detected indirect cooling tower in the air.

[0119] Specifically, the average inlet and outlet air temperatures of the to-be-detected indirect cooling tower include the average inlet air temperature and the average outlet air temperature. The inlet air temperature of each fan segment of the to-be-detected indirect cooling tower is uniformly the current ambient temperature. Therefore, the average inlet air temperature t a1 of the to-be-detected indirect cooling tower is the current ambient temperature. For the average outlet air temperature t a2 of the indirect cooling tower, it can be calculated based on the following formula:

[0120]

[0121] where n represents the number of fan segments of the to-be-detected indirect cooling tower, and t a2n represents the outlet air temperature of the nth fan segment.

[0122] Specifically, the air density change information of the to-be-detected indirect cooling tower during inlet and outlet is the air density difference between the inlet and outlet times of the indirect cooling tower. Specifically, the air density difference between the inlet and outlet times of the indirect cooling tower can be determined based on the following formula:

[0123] Δρ a = ρ a2 - ρ a1

[0124] ρ a2 = 1.293×(p atm / 101.325)×273.15 / (t a2 +273.15)

[0125] ρ a1 =1.293×(p atm / 101.325)×273.15 / (t a1 +273.15)

[0126] Among them, ρ a2 represents the air density at the outlet air moment, and ρ a1 represents the air density at the inlet air moment. p atm represents the measured local atmospheric pressure. 1.293 is the air density under normal temperature and pressure, 101.325 is the standard atmospheric pressure, and 273.15 is the conversion coefficient between the Kelvin scale and the Celsius scale.

[0127] Furthermore, the lift value of the to-be-detected indirect cooling tower in the air = He·g·Δρ a , where He represents the effective height of the to-be-detected indirect cooling tower, unit: meter (m). The effective height of the to-be-detected indirect cooling tower is equal to the tower height minus half of the radiator height. g represents the acceleration due to gravity, unit: m·s-2. Δρ a represents the air density change information of the to-be-detected indirect cooling tower during inlet and outlet air.

[0128] Specifically, based on the resistance-lift balance principle of the indirect cooling tower, the resistance value Δp of the to-be-detected indirect cooling tower in the air can be determined based on the following formula H :

[0129] Δp H =He·g·Δρ a

[0130] Based on the above embodiments, in order to accurately judge the fouling degree of each fan section, as an implementable method, in one embodiment, the method further includes:

[0131] Step 401: Determine the characteristic air temperature of the to-be-detected indirect cooling tower according to the average value of the inlet and outlet air temperatures of the to-be-detected indirect cooling tower;

[0132] Step 402: Determine the characteristic air density of the to-be-detected indirect cooling tower according to the characteristic air temperature of the to-be-detected indirect cooling tower and the measured local atmospheric pressure;

[0133] Step 403: Determine the ventilation volume of each fan section according to the characteristic air density of the to-be-detected indirect cooling tower, the heat dissipation amount of each fan section, and the inlet and outlet air temperatures;

[0134] Step 404: Determine the windward wind speed of each fan section according to the ventilation volume and heat dissipation area of each fan section;

[0135] Step 405: For any sector, when the wind speed on the windward side of the sector reaches the preset standard, determine whether the sector is a sector to be cleaned according to the relationship between the heat transfer coefficient of the sector and the preset threshold.

[0136] Specifically, the characteristic air density t of the intercooling tower to be measured can be determined based on the following formula a :

[0137] t a =(t a2 +t a1 ) / 2

[0138] Furthermore, the characteristic air density ρ of the intercooling tower to be measured can be determined based on the following formula:

[0139] ρ = 1.293×(p atm / 101.325)×273.15 / (t a +273.15)

[0140] For the explanations of the terms of each element in this formula, refer to the above embodiments and will not be elaborated here.

[0141] Furthermore, the ventilation volume q of each sector can be determined based on the following formula airn :

[0142] q airn =Q n / ρc p (t a2n -t a1n )

[0143] Wherein, q airn represents the ventilation volume of the nth sector, Q n represents the heat dissipation of the nth sector, t a1n represents the inlet air temperature of the nth sector, t a2n represents the outlet air temperature of the nth sector, ρ represents the characteristic air density of the intercooling tower to be measured, and c p represents the specific heat capacity at constant pressure of air, which can be considered a constant within the working temperature range of the intercooling tower, taking 1.005 kJ / (kg·°C), and the total ventilation volume of the air cooling tower

[0144] Furthermore, the wind speed v on the windward side of each sector can be determined based on the following formula n :

[0145] v n =q airn / A fn

[0146] Wherein, A fn is the windward area of the sector, and numerically it is equal to the heat dissipation area divided by the fin ratio, that is, Afn = A n / Ω, where Ω is the fin ratio and takes the design value.

[0147] Exemplarily, when the face velocity v of the fan section n is close to the designed face velocity v n(d) , that is, it reaches the preset standard: 0.97 < [v n / v n(d) < 1.03, it is judged whether the ratio between the real-time heat dissipation coefficient k of each fan section n and the design value k n(d) reaches the preset threshold. For example, when k of a certain fan section n / k n(d) > 1.2, it is determined that this fan section is the fan section to be cleaned.

[0148] The intercooling tower performance monitoring method provided by the embodiments of the present application obtains the inlet and outlet air temperatures and the inlet and outlet water temperatures of each fan section in the intercooling tower to be measured; determines the heat dissipation of each fan section according to the inlet and outlet water temperatures and the circulating water flow rate; determines the logarithmic mean temperature difference of each fan section according to the inlet and outlet air temperatures and the inlet and outlet water temperatures; determines the heat transfer coefficient of each fan section according to the heat dissipation, logarithmic mean temperature difference and heat transfer area of each fan section; and determines the performance monitoring result of the intercooling tower to be measured according to the heat transfer coefficient of each fan section. The method provided by the above solution determines the heat transfer coefficient of each fan section by obtaining the inlet and outlet air temperatures and the inlet and outlet water temperatures of each fan section in the intercooling tower to be measured in real time, and then determines the performance monitoring result of the intercooling tower to be measured, ensuring that the obtained performance monitoring result conforms to the actual heat dissipation situation of the intercooling tower and improving the accuracy of the intercooling tower performance monitoring result. Moreover, calculating the real-time heat dissipation coefficient and resistance of the intercooling tower, etc., on the one hand enables the operator to have an intuitive understanding of the dirtiness degree of the intercooling tower, and on the other hand provides guidance for the economic operation of the air cooling, achieving the purpose of energy conservation and emission reduction.

[0149] The embodiments of the present application provide an intercooling tower performance monitoring device for implementing the intercooling tower performance monitoring method provided by the above embodiments.

[0150] As Figure 3 shown, it is a schematic structural diagram of the intercooling tower performance monitoring device provided by the embodiments of the present application. The intercooling tower performance monitoring device 30 includes: an acquisition module 301, a first determination module 302, a second determination module 303, a third determination module 304 and a monitoring module 305.

[0151] Among them, an acquisition module is configured to acquire the inlet and outlet air temperatures and the inlet and outlet water temperatures of each fan section in the indirect cooling tower to be measured; a first determination module is configured to determine the heat dissipation of each fan section according to the inlet and outlet water temperatures and the circulating water flow rate; a second determination module is configured to determine the logarithmic mean temperature difference of each fan section according to the inlet and outlet air temperatures and the inlet and outlet water temperatures; a third determination module is configured to determine the heat transfer coefficient of each fan section according to the heat dissipation, the logarithmic mean temperature difference and the heat transfer area of each fan section; a monitoring module is configured to determine the performance monitoring result of the indirect cooling tower to be measured according to the heat transfer coefficient of each fan section.

[0152] Specifically, in one embodiment, the device further includes:

[0153] A resistance calculation module is configured to determine the average inlet and outlet air temperatures of the indirect cooling tower to be measured according to the average calculation result of the inlet and outlet air temperatures of each fan section; determine the air density change information during inlet and outlet of the indirect cooling tower to be measured according to the average inlet and outlet air temperatures of the indirect cooling tower to be measured and the actually measured local atmospheric pressure; determine the lift value of the indirect cooling tower in the air according to the air density change information, the effective height of the indirect cooling tower to be measured and the acceleration due to gravity; based on the equivalent relationship between the lift value and the resistance value of the indirect cooling tower in the air, determine the resistance value of the indirect cooling tower in the air according to the lift value of the indirect cooling tower in the air.

[0154] Specifically, in one embodiment, the device further includes:

[0155] A judgment module is configured to determine the characteristic air temperature of the indirect cooling tower to be measured according to the average inlet and outlet air temperatures of the indirect cooling tower to be measured;

[0156] Determine the characteristic air density of the indirect cooling tower to be measured according to the characteristic air temperature of the indirect cooling tower to be measured and the actually measured local atmospheric pressure;

[0157] Determine the ventilation volume of each fan section according to the characteristic air density of the indirect cooling tower to be measured, the heat dissipation of each fan section and the inlet and outlet air temperatures;

[0158] Determine the windward wind speed of each fan section according to the ventilation volume and the heat transfer area of each fan section;

[0159] For any fan section, when the windward wind speed of the fan section reaches a preset standard, determine whether the fan section is a fan section to be cleaned according to the relationship between the heat transfer coefficient of the fan section and a preset threshold.

[0160] Specifically, in one embodiment, each finned tube of each fan section of the indirect cooling tower to be measured is provided with a plurality of temperature sensors, and the inlet and outlet air temperatures include the inlet air temperature and the outlet air temperature. The acquisition module is specifically configured to:

[0161] For any fan section, acquire the outlet air temperature measured by each temperature sensor in the fan section;

[0162] Calculate the average value of the outlet air temperature measured by each temperature sensor to obtain the outlet air temperature of this fan section;

[0163] Determine the current ambient temperature as the inlet air temperature.

[0164] Specifically, in one embodiment, the inlet and outlet water temperatures include the inlet water temperature and the outlet water temperature. The first determination module is specifically used for:

[0165] Calculate the heat dissipation of each fan section based on the following formula:

[0166] Q n =q n ρ w c pw (t w2n -t w1n )

[0167] Where, Q n represents the heat dissipation of the nth fan section, q n represents the circulating water flow rate of the nth fan section, ρ w represents the circulating water density, c pw represents the constant pressure specific heat capacity of the circulating water, t w2n represents the outlet water temperature of the nth fan section, t w1n represents the inlet water temperature of the nth fan section.

[0168] Specifically, in one embodiment, the second determination module is specifically used for:

[0169] Calculate the logarithmic mean temperature difference of each fan section based on the following formula:

[0170]

[0171] Where, Δt mn represents the logarithmic mean temperature difference of the nth fan section, t w2n represents the outlet water temperature of the nth fan section, t w1n represents the inlet water temperature of the nth fan section, t a1n represents the inlet air temperature of the nth fan section, t a2n represents the outlet air temperature of the nth fan section.

[0172] Specifically, in one embodiment, the third determination module is specifically used for:

[0173] Calculate the heat transfer coefficient of each fan section based on the following formula:

[0174]

[0175] Where, k n represents the heat transfer coefficient of the nth fan section, Q n represents the heat dissipation of the nth fan section, Δtmn represents the logarithmic heat transfer temperature difference of the nth sector segment, A n represents the heat dissipation area of the nth sector segment.

[0176] Regarding the indirect cooling tower performance monitoring device in this embodiment, the specific manners in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0177] The indirect cooling tower performance monitoring device provided by an embodiment of the present application is used to execute the indirect cooling tower performance monitoring method provided by the above-mentioned embodiment, and its implementation manner and principle are the same, and will not be repeated.

[0178] An embodiment of the present application provides an electronic device for executing the indirect cooling tower performance monitoring method provided by the above-mentioned embodiment.

[0179] As Figure 4 shown, it is a schematic structural diagram of the electronic device provided by an embodiment of the present application. The electronic device 40 includes: at least one processor 41 and a memory 42.

[0180] The memory stores computer-executable instructions; at least one processor executes the computer-executable instructions stored in the memory, so that at least one processor executes the indirect cooling tower performance monitoring method provided by the above-mentioned embodiment.

[0181] An embodiment of the present application provides an electronic device for executing the indirect cooling tower performance monitoring method provided by the above-mentioned embodiment, and its implementation manner and principle are the same, and will not be repeated.

[0182] An embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the processor executes the computer-executable instructions, the indirect cooling tower performance monitoring method provided by any one of the above embodiments is implemented.

[0183] The storage medium containing computer-executable instructions in an embodiment of the present application can be used to store the computer-executable instructions of the indirect cooling tower performance monitoring method provided in the foregoing embodiments, and its implementation manner and principle are the same, and will not be repeated.

[0184] In several embodiments provided by the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical, mechanical or other form.

[0185] The unit described as a separation component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0186] In addition, in each embodiment of the present application, each functional unit can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated unit can be implemented in the form of hardware, or in the form of a combination of hardware and software functional units.

[0187] The above integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above software functional unit stored in a storage medium includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute some steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0188] Those skilled in the art can clearly understand that for the convenience and brevity of description, only the above division of each functional module is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the device described above can refer to the corresponding process in the foregoing method embodiments and will not be elaborated here.

[0189] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of each embodiment of the present application.

Claims

1. A method for monitoring the performance of an indirect cooling tower, characterized in that, Including: Obtain the inlet and outlet air temperatures and inlet and outlet water temperatures of each fan section in the indirect cooling tower to be measured; Determine the heat dissipation of each fan section according to the inlet and outlet water temperatures and the circulating water flow rate; Determine the logarithmic mean temperature difference of each fan section according to the inlet and outlet air temperatures and the inlet and outlet water temperatures; Determine the heat transfer coefficient of each fan section according to the heat dissipation, logarithmic mean temperature difference and heat transfer area of each fan section; Determine the performance monitoring result of the indirect cooling tower to be measured according to the heat transfer coefficient of each fan section; The method further includes: Determine the average inlet and outlet air temperatures of the indirect cooling tower to be measured according to the average calculation result of the inlet and outlet air temperatures of each fan section; Determine the air density change information when the indirect cooling tower to be measured is inlet and outlet air according to the average inlet and outlet air temperatures of the indirect cooling tower to be measured and the locally measured atmospheric pressure; Determine the lift value of the indirect cooling tower to be measured in the air according to the air density change information, the effective height of the indirect cooling tower to be measured and the acceleration due to gravity; Based on the equivalent relationship between the lift value and the drag value of the indirect cooling tower to be measured in the air, determine the drag value of the indirect cooling tower to be measured in the air according to the lift value of the indirect cooling tower to be measured in the air; Determine the characteristic air temperature of the indirect cooling tower to be measured according to the average inlet and outlet air temperatures of the indirect cooling tower to be measured; Determine the characteristic air density of the indirect cooling tower to be measured according to the characteristic air temperature of the indirect cooling tower to be measured and the locally measured atmospheric pressure; Determine the ventilation volume of each fan section according to the characteristic air density of the indirect cooling tower to be measured, the heat dissipation of each fan section and the inlet and outlet air temperatures; Determine the windward wind speed of each fan section according to the ventilation volume and heat transfer area of each fan section; For any one of the fan sections, when the windward wind speed of the fan section reaches a preset standard, judge whether the fan section is a fan section to be cleaned according to the relationship between the heat transfer coefficient of the fan section and a preset threshold value.

2. According to the method described in claim 1, multiple temperature sensors are provided for each finned tube of each fan section of the intercooling tower to be measured, and the inlet and outlet air temperatures include the inlet air temperature and the outlet air temperature, characterized in that, The obtaining of the inlet and outlet air temperatures of each fan section in the indirect cooling tower to be measured includes: For any one of the fan sections, obtain the outlet air temperatures measured by each temperature sensor in the fan section; Perform an average calculation on the outlet air temperatures measured by each temperature sensor to obtain the outlet air temperature of the fan section; Determine the current ambient temperature as the inlet air temperature.

3. The method according to claim 1, wherein the inlet and outlet temperatures include the inlet temperature and the outlet temperature, characterized in that, The determining of the heat dissipation of each fan section according to the inlet and outlet water temperatures and the circulating water flow rate includes: Calculate the heat dissipation of each fan section based on the following formula: Among them, represents the heat dissipation of the nth sector segment, represents the circulating water flow rate of the nth sector segment, represents the density of the circulating water, represents the constant-pressure specific heat capacity of the circulating water, represents the outlet water temperature of the nth sector segment, represents the inlet water temperature of the nth sector segment.

4. The method according to claim 1, wherein The determining of the logarithmic mean temperature difference of each fan section according to the inlet and outlet air temperatures and the inlet and outlet water temperatures includes: Calculate the logarithmic mean temperature difference of each fan section based on the following formula: Among them, represents the logarithmic heat transfer temperature difference of the nth sector segment, represents the outlet water temperature of the nth sector segment, represents the inlet water temperature of the nth sector segment, represents the inlet air temperature of the nth sector segment, represents the outlet air temperature of the nth sector segment.

5. The method according to claim 1, wherein The determining of the heat transfer coefficient of each fan section according to the heat dissipation, logarithmic mean temperature difference and heat transfer area of each fan section includes: Calculate the heat transfer coefficient of each fan section based on the following formula: Among them, represents the heat transfer coefficient of the nth sector segment, represents the heat dissipation of the nth sector segment, represents the logarithmic mean temperature difference of the nth sector segment, represents the heat dissipation area of the nth sector segment.

6. An intermediate cooling tower performance monitoring device for implementing the method according to any one of claims 1 to 5, characterized in that, Including: An obtaining module, configured to obtain the inlet and outlet air temperatures and the inlet and outlet water temperatures of each fan section in the indirect cooling tower to be measured; A first determining module, configured to determine the heat dissipation of each fan section according to the inlet and outlet water temperatures and the circulating water flow rate; A second determining module, configured to determine the logarithmic mean temperature difference of each fan section according to the inlet and outlet air temperatures and the inlet and outlet water temperatures; A third determination module, configured to determine the heat transfer coefficient of each of the fan segments according to the heat dissipation amount, logarithmic heat transfer temperature difference, and heat dissipation area of each of the fan segments; A monitoring module, configured to determine the performance monitoring result of the to-be-tested indirect cooling tower according to the heat transfer coefficient of each of the fan segments.

7. An electronic device, characterized in that, Comprising: At least one processor and a memory; The memory stores computer-executable instructions; The at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor executes the method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, Computer-executable instructions are stored in the computer-readable storage medium, and when the processor executes the computer-executable instructions, the method according to any one of claims 1 to 5 is implemented.

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