CN115014819A - A method, device, electronic device and storage medium for monitoring performance of an indirect cooling tower - Google Patents

Abstract

The application provides a method and a device for monitoring the performance of an indirect cooling tower, electronic equipment and a storage medium, wherein the method comprises the following steps: acquiring the air inlet and outlet temperature and the water inlet and outlet temperature of each sector in the intercooling tower to be detected; determining the heat dissipation capacity of each sector according to the temperature of inlet and outlet water and the flow of circulating water; determining logarithmic heat exchange temperature difference of each sector according to the air inlet and outlet temperature and the water inlet and outlet temperature; determining the heat exchange coefficient of each sector according to the heat dissipation capacity, the logarithmic heat exchange temperature difference and the heat dissipation area of each sector; and determining the performance monitoring result of the intercooling tower to be tested according to the heat exchange coefficient of each sector. According to the method provided by the scheme, the heat exchange coefficient of each sector is determined according to the air inlet and outlet temperature and the water inlet and outlet temperature of each sector in the indirect cooling tower to be detected, so that the performance monitoring result of the indirect cooling tower to be detected is determined, the obtained performance monitoring result is ensured to be in line with the actual heat dissipation condition of the indirect cooling tower, and the accuracy of the performance monitoring result of the indirect cooling tower is improved.

Description

A method, device, electronic device and storage medium for monitoring performance of an indirect cooling tower

technical field

The present application relates to the technical field of indirect cooling tower management, and in particular, to a method, device, electronic device and storage medium for monitoring the performance of an indirect cooling tower.

Background technique

At present, the indirect cooling tower has been widely used in water-deficient areas due to its advantages of good operating economy and low noise. Among them, the cleaning frequency of the intermediate cooling tower depends on the heat exchange performance of the intermediate cooling tower, so how to determine the heat exchange performance of the intermediate cooling tower has become the key research content.

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

However, since the intercooling tower is exposed to the air, its heat exchange performance is easily affected by contamination. Therefore, the accuracy of the determination result of the heat exchange performance of the intercooling tower obtained by the prior art is low, which is not in line with the actual situation of the intercooling tower. heat dissipation.

SUMMARY OF THE INVENTION

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

A first aspect of the present application provides a method for monitoring the performance of an intermediate cooling tower, including:

Obtain the inlet and outlet air temperature and inlet and outlet water temperature of each sector in the cooling tower to be tested;

According to the temperature of the inlet and outlet water and the flow rate of circulating water, determine the heat dissipation of each of the fan segments;

According to the inlet and outlet air temperatures and inlet and outlet water temperatures, determine the logarithmic heat exchange temperature difference of each of the segments;

According to the heat dissipation capacity, logarithmic heat exchange temperature difference and heat dissipation area of each said segment, the heat transfer coefficient of each said segment is determined;

According to the heat transfer coefficient of each segment, the performance monitoring result of the indirect cooling tower to be tested is determined.

Optionally, also include:

According to the calculation result of the mean value of the inlet and outlet air temperatures of each segment, determine the mean value of the inlet and outlet air temperatures of the intercooling tower to be tested;

According to the average temperature of the inlet and outlet air of the cooling tower to be measured and the local measured atmospheric pressure, determine the air density change information of the cooling tower to be measured during the inlet and outlet air;

According to the air density change information, the effective height of the intercooling tower to be measured and the acceleration of gravity, determine the lift value of the intercooling tower to be measured in the air;

Based on the equivalent relationship between the lift value and the resistance value of the intercooling tower to be tested in the air, and according to the lift value of the intercooling tower to be tested in the air, it is determined that the intercooling tower to be tested is in the air resistance value.

Optional, including:

Determine the characteristic air temperature of the intercooling tower to be measured according to the average temperature of the air inlet and outlet of the intercooling tower to be measured;

According to the characteristic air temperature of the intercooling tower to be measured and the local measured atmospheric pressure, determine the characteristic air density of the intercooling tower to be measured;

Determine the ventilation volume of each segment according to the characteristic air density of the intercooling tower to be measured, the heat dissipation of each segment and the temperature of the inlet and outlet air;

According to the ventilation volume and heat dissipation area of each of the fan sections, determine the upwind wind speed of each of the fan sections;

For any of the sectors, when the upwind wind speed of the sector reaches a preset standard, it is determined 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.

Optionally, the finned tubes of each sector of the intercooling tower to be measured are provided with a plurality of temperature sensors, and the temperature of the incoming and outgoing air includes the temperature of the incoming air and the temperature of the outgoing air. The inlet and outlet air temperatures for each segment, including:

For any one of the sectors, obtain the outlet air temperature measured by each temperature sensor in the sector;

Calculate the mean value of the outlet air temperature measured by each of the temperature sensors to obtain the outlet air temperature of the sector;

The current ambient temperature is determined as the inlet air temperature.

Optionally, the inlet and outlet water temperatures include inlet water temperature and outlet water temperature, and determining the heat dissipation of each of the fan segments according to the inlet and outlet water temperatures and the circulating water flow rate includes:

Calculate the heat dissipation of each of the segments based on the following formula:

Q _n =q _n ρ _w c _pw (t _w2n -t _w1n )

Among them, Qn represents the heat dissipation of the _nth sector, qn represents the circulating water flow of the nth sector, _ρw represents the circulating water density, _cpw represents the constant pressure specific heat capacity of the circulating water, and _tw2n represents the _nth fan is the outlet water temperature of the segment, and _tw1n represents the inlet water temperature of the nth sector.

Optionally, determining the logarithmic heat exchange temperature difference of each of the sectors according to the inlet and outlet air temperatures and inlet and outlet water temperatures, including:

Calculate the logarithmic heat transfer temperature difference of each of the segments based on the following formula:

Among them, Δt _mn represents the logarithmic heat exchange temperature difference of the nth sector, t _w2n represents the outlet water temperature of the nth sector, t _w1n represents the inlet water temperature of the nth sector, and t _a1n represents the nth sector is the inlet air temperature, and t _a2n represents the outlet air temperature of the nth sector.

Optionally, determining the heat transfer coefficient of each segment according to the heat dissipation, logarithmic heat exchange temperature difference and heat dissipation area of each segment, including:

Calculate the heat transfer coefficient of each of the segments based on the following formula:

Among them, k _n represents the heat transfer coefficient of the _nth sector, Qn represents the heat dissipation of the nth sector, _Δtmn represents the logarithmic heat transfer temperature difference of the _nth sector, and An represents the nth sector heat dissipation area.

A second aspect of the present application provides an intercooling tower performance monitoring device, comprising:

The acquisition module is used to acquire the inlet and outlet air temperature and inlet and outlet water temperature of each sector in the intercooling tower to be tested;

The first determination module determines the heat dissipation of each of the sectors according to the temperature of the inlet and outlet water and the flow rate of the circulating water;

a second determining module, configured to determine the logarithmic heat exchange temperature difference of each of the sectors according to the temperature of the inlet and outlet air and the temperature of the inlet and outlet water;

A third determination module, configured to determine the heat transfer coefficient of each of the fan segments according to the heat dissipation, logarithmic heat exchange temperature difference and heat dissipation area of each of the fan segments;

The monitoring module is used for determining the performance monitoring result of the intercooling tower to be tested according to the heat transfer coefficient of each of the sectors.

Optionally, the device further includes:

The resistance calculation module is used to determine the average temperature of the inlet and outlet air of the cooling tower to be tested according to the calculation result of the average value of the temperature of the inlet and outlet air of each segment; according to the average temperature of the inlet and outlet air of the cooling tower to be tested and local Measure the atmospheric pressure, and determine the air density change information of the cooling tower to be measured when the air is in and out; according to the information of the air density change, the effective height of the cooling tower to be measured and the acceleration of gravity, determine that the cooling tower to be measured is at The lift value in the air; based on the linear relationship between the lift value and the resistance value of the cooling tower in the room to be tested, and the lift value of the cooling tower in the air to determine the room to be tested The resistance value of the cooling tower in the air.

Optionally, the device further includes:

a judgment module, configured to determine the characteristic air temperature of the intercooling tower to be tested according to the average temperature of the inlet and outlet air of the intercooling tower to be tested;

According to the characteristic air temperature of the intercooling tower to be measured and the local measured atmospheric pressure, determine the characteristic air density of the intercooling tower to be measured;

Determine the ventilation volume of each segment according to the characteristic air density of the intercooling tower to be measured, the heat dissipation of each segment and the temperature of the inlet and outlet air;

According to the ventilation volume and heat dissipation area of each of the fan sections, determine the upwind wind speed of each of the fan sections;

For any of the sectors, when the upwind wind speed of the sector reaches a preset standard, it is determined 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.

Optionally, the finned tubes of each sector of the intercooling tower to be tested are provided with a plurality of temperature sensors, and the inlet and outlet air temperatures include inlet air temperature and outlet air temperature, and the acquisition module is specifically used for:

For any one of the sectors, obtain the outlet air temperature measured by each temperature sensor in the sector;

Calculate the mean value of the outlet air temperature measured by each of the temperature sensors to obtain the outlet air temperature of the sector;

The current ambient temperature is determined as the inlet air temperature.

Optionally, the inlet and outlet water temperatures include inlet water temperature and outlet water temperature, and the first determining module is specifically used for:

Calculate the heat dissipation of each of the segments based on the following formula:

Q _n =q _n ρ _w c _pw (t _w2n -t _w1n )

Among them, Qn represents the heat dissipation of the _nth sector, qn represents the circulating water flow of the nth sector, _ρw represents the circulating water density, _cpw represents the constant pressure specific heat capacity of the circulating water, and _tw2n represents the _nth fan is the outlet water temperature of the segment, and _tw1n represents the inlet water temperature of the nth sector.

Optionally, the second determining module is specifically used for:

Calculate the logarithmic heat transfer temperature difference of each of the segments based on the following formula:

Among them, Δt _mn represents the logarithmic heat exchange temperature difference of the nth sector, t _w2n represents the outlet water temperature of the nth sector, t _w1n represents the inlet water temperature of the nth sector, and t _a1n represents the nth sector is the inlet air temperature, and t _a2n represents the outlet air temperature of the nth sector.

Optionally, the third determining module is specifically used for:

Calculate the heat transfer coefficient of each of the segments based on the following formula:

Among them, k _n represents the heat transfer coefficient of the n-th sector, Q _n represents the heat dissipation of the n-th sector, Δt _mn represents the logarithmic heat transfer temperature difference of the n-th sector, and A _n represents the n-th sector heat dissipation area.

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

the memory stores computer-executable instructions;

The at least one processor executes computer-implemented instructions stored in the memory to cause the at least one processor to perform the methods described above in the first aspect and various possible designs of the first aspect.

A fourth aspect of the present application provides a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when a processor executes the computer-executable instructions, the first aspect and the first Aspects various possible designs of the described method.

The technical solution of the present application has the following advantages:

The present application provides a method, device, electronic device and storage medium for monitoring the performance of an intercooling tower. The method includes: acquiring the inlet and outlet air temperature and inlet and outlet water temperature of each sector in the intercooling tower to be measured; The water flow rate is used to determine the heat dissipation of each segment; the logarithmic heat exchange temperature difference of each segment is determined according to the temperature of the inlet and outlet air and the temperature of the inlet and outlet water; The heat transfer coefficient of the sector; according to the heat transfer coefficient of each sector, the performance monitoring results of the intercooling tower to be tested are determined. The method provided by the above scheme determines the heat transfer coefficient of each sector according to the real-time acquisition of the inlet and outlet air temperature and inlet and outlet water temperature of each sector in the intercooling tower to be tested, and then determines the performance monitoring of the intercooling tower to be tested. As a result, it is ensured that the obtained performance monitoring result conforms to the actual heat dissipation situation of the indirect cooling tower, and the accuracy of the performance monitoring result of the indirect cooling tower is improved.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present application, and for those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

1 is a schematic structural diagram of an indirect cooling tower performance monitoring system based on an embodiment of the application;

2 is a schematic flowchart of a method for monitoring the performance of an intercooling tower provided by an embodiment of the present application;

3 is a schematic structural diagram of an apparatus for monitoring performance of an indirect cooling tower provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

Specific embodiments of the present application have been shown by the above-mentioned drawings, and will be described in more detail hereinafter. These drawings and written descriptions are not intended to limit the scope of the disclosed concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by referring to specific embodiments.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. In the description of the following embodiments, the meaning of "plurality" is two or more, unless otherwise expressly and specifically defined.

In the prior art, the heat exchange performance of the indirect cooling tower is usually determined according to the experimental heat dissipation coefficient and the corresponding reduction coefficient of the air-cooling tube bundle of the intermediate cooling tower when it leaves the factory. However, since the intercooling tower is exposed to the air, its heat exchange performance is easily affected by contamination, and the intercooling tower has many segments (8-12). Due to manufacturing and installation reasons, the heat dissipation coefficient of each segment is equal to The use of constant thermal resistance experimental values will lead to low monitoring accuracy of the heat exchange performance of the intercooling tower, and insufficient guidance for the optimal operation of the intercooling tower and the frequency of cleaning.

In view of the above problems, the method, device, electronic device and storage medium for the performance monitoring of the indirect cooling tower provided by the embodiments of the present application obtain the inlet and outlet air temperatures and inlet and outlet water temperatures of each sector in the indirect cooling tower to be measured; and circulating water flow to determine the heat dissipation of each fan section; according to the inlet and outlet air temperature and inlet and outlet water temperature, determine the logarithmic heat exchange temperature difference of each fan section; according to the heat dissipation, logarithmic heat exchange temperature difference and heat dissipation area of each fan section, Determine the heat transfer coefficient of each sector; determine the performance monitoring results of the intercooling tower to be tested according to the heat transfer coefficient of each sector. The method provided by the above scheme determines the heat transfer coefficient of each sector according to the real-time acquisition of the inlet and outlet air temperature and inlet and outlet water temperature of each sector in the intercooling tower to be tested, and then determines the performance monitoring of the intercooling tower to be tested. As a result, it is ensured that the obtained performance monitoring result conforms to the actual heat dissipation situation of the indirect cooling tower, and the accuracy of the performance monitoring result of the indirect cooling tower is improved.

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.

First, the structure of the intercooling tower performance monitoring system on which this application is based is explained:

The method, device, electronic device, and storage medium for monitoring the performance of an intermediate cooling tower provided in the embodiments of the present application are suitable for testing the heat exchange performance of an intermediate cooling tower. As shown in FIG. 1 , it is a schematic structural diagram of an indirect cooling tower performance monitoring system based on an embodiment of the present application, which mainly includes an indirect cooling tower, a data acquisition device, and an electronic device equipped with an indirect cooling tower performance monitoring device. Specifically, the inlet and outlet air temperatures and inlet and outlet water temperatures of each sector in the indirect cooling tower can be collected based on the data collection device, and the collected information can be sent to the electronic device, which is based on the performance monitoring device of the indirect cooling tower, according to the received data. information to determine the performance monitoring results of the cooling tower.

The embodiment of the present application provides a method for monitoring the performance of an intermediate cooling tower, which is used to detect the heat exchange performance of the intermediate cooling tower. The execution subject of the embodiment of the present application is an electronic device, such as a server, a desktop computer, a notebook computer, a tablet computer, and other electronic devices that can be used to detect the heat exchange performance of the indirect cooling tower.

As shown in FIG. 2 , a schematic flowchart of a method for monitoring the performance of an intercooling tower provided in an embodiment of the present application, the method includes:

Step 201: Obtain the inlet and outlet air temperatures and inlet and outlet water temperatures of each sector in the intercooling tower to be tested.

Among them, the finned tubes of each segment of the intercooling tower to be tested are provided with multiple temperature sensors, and the temperature of the incoming and outgoing air includes the temperature of the incoming air and the temperature of the outgoing air.

Specifically, in one embodiment, for any sector, the outlet air temperature measured by each temperature sensor in the sector is obtained; the average value of the outlet air temperature measured by each temperature sensor is calculated to obtain the outlet air temperature of the sector. Air temperature; determine the current ambient temperature as the inlet air temperature.

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

Correspondingly, a water temperature sensor can be provided at the water outlet and the water inlet of the fan section, and the circulating water inlet temperature and circulating water outlet temperature of the fan section at the current moment can be measured based on the water temperature sensor.

Among them, since the inlet air temperature of each sector 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 sector.

Step 202: Determine the heat dissipation of each sector according to the temperature of the inlet and outlet water and the flow rate of the circulating water.

Specifically, the inlet and outlet water temperature includes the inlet water temperature and the outlet water temperature, and the heat dissipation of the fan segment 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 segment and the circulating water flow rate. Wherein, the flow rate of the circulating water can be detected based on a preset flow sensor.

Specifically, in an embodiment, the heat dissipation Q _n of each sector can be calculated based on the following formula:

Q _n =q _n ρ _w c _pw (t _w2n -t _w1n )

Among them, Qn represents the heat dissipation of the _nth sector, qn represents the circulating water flow of the nth sector, _ρw represents the circulating water density, _cpw represents the constant pressure specific heat capacity of the circulating water, and _tw2n represents the _nth fan is the outlet water temperature of the segment, and _tw1n represents the inlet water temperature of the nth sector.

It should be noted that the circulating water usually uses available wastewater or groundwater, the density of the circulating water can be treated as a constant, and the specific heat capacity of the circulating water at constant pressure is usually 4.18kJ/(kg·℃).

Step 203: Determine the logarithmic heat exchange temperature difference of each sector according to the temperature of the inlet and outlet air and the temperature of the inlet and outlet water.

Among them, the logarithmic heat transfer temperature difference is used to characterize the overall heat transfer performance of the sector.

Specifically, in an embodiment, the logarithmic heat exchange temperature difference Δt _mn of each sector can be calculated based on the following formula:

Among them, Δt _mn represents the logarithmic heat exchange temperature difference of the nth sector, t _w2n represents the outlet water temperature of the nth sector, t _w1n represents the inlet water temperature of the nth sector, and t _a1n represents the nth sector is the inlet air temperature, and t _a2n represents the outlet air temperature of the nth sector.

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

Among them, the heat dissipation area of the fan segment is the area of the fan segment. The larger the heat dissipation area of the fan segment, the greater the corresponding heat dissipation and the logarithmic heat exchange temperature difference. Therefore, to detect the specific heat exchange performance of the fan segment, it needs to be combined with its heat dissipation area. to analyze.

Specifically, in an embodiment, the heat transfer coefficient k _n of each sector can be calculated based on the following formula:

Among them, k _n represents the heat transfer coefficient of the n-th sector, Q _n represents the heat dissipation of the n-th sector, Δt _mn represents the logarithmic heat transfer temperature difference of the n-th sector, and A _n represents the n-th sector heat dissipation area.

Step 205: Determine the performance monitoring result of the intercooling tower to be tested according to the heat transfer coefficient of each sector.

Specifically, the performance monitoring result of the indirect cooling tower to be tested can be obtained by summarizing the heat transfer coefficients of each sector. Among them, the performance monitoring results can be output in the form of an indirect cooling tower monitoring report.

On the basis of the above-mentioned embodiment, since the intercooling tower is exposed to the air, when the degree of surface contamination is high, the heat exchange performance of the intercooler tower will be affected. Therefore, in order to ensure the heat exchange performance of the intercooler tower, As an implementable manner, in one embodiment, the method further includes:

Step 301, according to the calculation result of the mean value of the inlet and outlet air temperatures of each sector, determine the mean value of the inlet and outlet air temperatures of the cooling tower to be measured;

Step 302, according to the average temperature of the inlet and outlet air of the cooling tower to be tested and the local measured atmospheric pressure, determine the air density change information of the cooling tower to be tested during the inlet and outlet air;

Step 303, according to the air density change information, the effective height of the cooling tower to be measured and the acceleration of gravity, determine the lift value of the cooling tower to be measured in the air;

Step 304 determines the resistance value of the intercooling tower to be tested in air based on the linear relationship between the lift value and the resistance value of the intercooling tower to be tested in air and the lift value of the intercooler to be tested in air.

Specifically, the average temperature of the inlet and outlet air of the cooling tower to be tested includes the average temperature of the inlet air and the average temperature of the outlet air. The temperature of the inlet air of each sector of the cooling tower to be tested is unified to the current ambient temperature, so the The average inlet air temperature t _a1 is the current ambient temperature. For the average air temperature t _a2 of the intercooling tower, it can be calculated based on the following formula:

Among them, n represents the number of sectors of the intercooling tower to be tested, and t _a2n represents the outlet air temperature of the nth sector.

Specifically, the air density change information of the intercooling tower to be measured when the air enters and leaves the air is the air density difference between the air inlet time and the air outlet time of the intercooling tower. Specifically, the air inlet time and the air outlet time of the intercooling tower can be determined based on the following formula. The air density difference is:

Δρ _a =ρ _a2 -ρ _a1

ρ _a2 =1.293×(p _atm /101.325)×273.15/(t _a2 +273.15)

ρ _a1 =1.293×(p _atm /101.325)×273.15/(t _a1 +273.15)

Among them, ρ _a2 is the air density at the time of the wind, ρ _a1 is the air density at the time of the wind, p _atm is the measured local atmospheric pressure, 1.293 is the air density at normal temperature and pressure, 101.325 is the standard atmospheric pressure, 273.15 is the open temperature scale and Conversion factor between Celsius temperature scales.

Further, the lift value of the intercooling tower to be measured in the air=He·g·Δρ _a , He represents the effective height of the intercooling tower to be measured, unit: m (m), and the effective height of the intercooling tower to be measured is equal to the tower Height minus half of the height of the radiator, g represents the acceleration of gravity, unit: m·s-2, Δρ _a represents the air density change information of the cooling tower to be tested when the air is entering and leaving the air.

Specifically, based on the resistance-lift balance principle of the indirect cooling tower, the resistance value Δp _H of the indirect cooling tower to be measured in air can be determined based on the following formula:

Δp _H =He·g· _Δρa

On the basis of the above embodiment, in order to accurately judge the degree of contamination of each sector, as an implementable manner, in an embodiment, the method further includes:

Step 401: Determine the characteristic air temperature of the intercooling tower to be tested according to the average temperature of the inlet and outlet air of the intercooling tower to be tested;

Step 402, according to the characteristic air temperature of the intercooling tower to be measured and the local measured atmospheric pressure, determine the characteristic air density of the intercooling tower to be measured;

Step 403: Determine the ventilation volume of each segment according to the characteristic air density of the cooling tower to be measured, the heat dissipation of each segment, and the temperature of the incoming and outgoing air;

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

Step 405 , for any sector, when the upwind wind speed of the sector reaches a preset standard, according to the relationship between the heat transfer coefficient of the sector and the preset threshold, determine whether the sector is a sector to be cleaned.

Specifically, the characteristic air density _ta of the intercooling tower to be measured can be determined based on the following formula:

t _a =(t _a2 +t _a1 )/2

Further, the characteristic air density ρ of the intercooling tower to be measured can be determined based on the following formula:

ρ=1.293×(p _atm /101.325)×273.15/(t _a +273.15)

Wherein, the noun explanation of each element in the formula can refer to the above-mentioned embodiment, which will not be repeated here.

Further, the ventilation volume q _airn of each sector can be determined based on the following formula:

q _airn =Q _n /ρc _p (t _a2n -t _a1n )

Among them, q _airn represents the ventilation volume of the _nth sector, Qn represents the heat dissipation of the nth sector, t _a1n represents the inlet air temperature of the nth sector, and t _a2n represents the outlet air of the nth sector Temperature, ρ represents the characteristic air density of the intercooling tower to be tested, c _p represents the specific heat capacity of the air at constant pressure, which can be regarded as a constant within the working temperature of the intercooling tower, taking 1.005kJ/(kg·℃), the total ventilation volume of the air cooling tower

Further, the upwind wind speed v _n of each sector can be determined based on the following formula:

v _n =q _airn /A _fn

Among them, A _fn is the windward area of the fan segment, which is numerically equal to the heat dissipation area divided by the finning ratio, that is, A _fn = An /Ω, where Ω is the finning _ratio , which is the design value.

Exemplarily, when the fan head wind speed v _n is close to the design head wind speed v _n(d) , that is, the preset standard is reached: 0.97<[v _n /v _n(d) ]<1.03, and the real-time heat dissipation of each fan section is judged Whether the ratio between the coefficient k _n and the design value k _n(d) reaches a preset threshold, for example, when a certain sector k _n /k _n(d) >1.2, the sector is determined to be the sector to be cleaned.

In the method for monitoring the performance of the indirect cooling tower provided by the embodiment of the present application, the air inlet and outlet temperature and the temperature of the inlet and outlet water of each sector in the indirect cooling tower to be measured are obtained; the heat dissipation of each sector is determined according to the temperature of the inlet and outlet water and the flow rate of the circulating water. ;According to the inlet and outlet air temperature and inlet and outlet water temperature, determine the logarithmic heat transfer temperature difference of each fan section; according to the heat dissipation capacity, logarithmic heat transfer temperature difference and heat dissipation area of each fan section, determine the heat transfer coefficient of each fan section; The heat transfer coefficient of the section is determined to determine the performance monitoring results of the cooling tower to be tested. The method provided by the above scheme determines the heat transfer coefficient of each sector according to the real-time acquisition of the inlet and outlet air temperature and inlet and outlet water temperature of each sector in the intercooling tower to be tested, and then determines the performance monitoring of the intercooling tower to be tested. As a result, it is ensured that the obtained performance monitoring result conforms to the actual heat dissipation situation of the indirect cooling tower, and the accuracy of the performance monitoring result of the indirect cooling tower is improved. In addition, calculating the real-time heat dissipation coefficient and resistance of the intercooling tower, on the one hand, enables operators to have an intuitive understanding of the degree of contamination of the indirect cooling tower, and on the other hand provides guidance for the economical operation of air cooling to achieve the purpose of energy saving and emission reduction.

The embodiments of the present application provide an apparatus for monitoring the performance of an intermediate cooling tower, which is used to implement the method for monitoring the performance of an intermediate cooling tower provided by the above embodiments.

As shown in FIG. 3 , it is a schematic structural diagram of the device for monitoring the performance of the indirect cooling tower provided in the embodiment 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 .

Among them, the acquisition module is used to acquire the inlet and outlet air temperature and inlet and outlet water temperature of each sector in the intercooling tower to be tested; the first determination module determines the heat dissipation of each sector according to the inlet and outlet water temperature and circulating water flow; the third The second determination module is used to determine the logarithmic heat exchange temperature difference of each sector according to the inlet and outlet air temperatures and the inlet and outlet water temperatures; the third determination module is used to determine the logarithmic heat exchange temperature difference and heat dissipation area of each fan segment according to the Determine the heat transfer coefficient of each sector; the monitoring module is used to determine the performance monitoring results of the intercooling tower to be measured according to the heat transfer coefficient of each sector.

Specifically, in one embodiment, the device further includes:

The resistance calculation module is used to determine the average temperature of the inlet and outlet air of the cooling tower under test according to the calculation result of the average value of the inlet and outlet air temperatures of each sector; The air density change information of the intercooling tower when entering and leaving the air; according to the air density change information, the effective height of the intercooling tower to be tested and the acceleration of gravity, the lift value of the intercooling tower to be tested in the air is determined; based on the intercooling tower to be tested The linear relationship between the lift value and the resistance value in the air, according to the lift value of the cooling tower to be tested in the air, determine the resistance value of the cooling tower to be tested in the air.

Specifically, in one embodiment, the device further includes:

The judgment module is used to determine the characteristic air temperature of the intercooling tower to be tested according to the average temperature of the incoming and outgoing air of the intercooling tower to be tested;

According to the characteristic air temperature of the cooling tower to be tested and the local measured atmospheric pressure, determine the characteristic air density of the cooling tower to be tested;

Determine the ventilation volume of each segment according to the characteristic air density of the cooling tower to be tested, the heat dissipation of each segment and the temperature of the incoming and outgoing air;

According to the ventilation volume and heat dissipation area of each fan section, determine the upwind wind speed of each fan section;

For any sector, when the upwind wind speed of the sector reaches the preset standard, it is determined 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.

Specifically, in one embodiment, the finned tubes of each sector of the intercooling tower to be tested are provided with a plurality of temperature sensors, and the inlet and outlet air temperatures include the inlet air temperature and the outlet air temperature, and the acquisition module is specifically used for:

For any sector, obtain the outlet air temperature measured by each temperature sensor in the sector;

Calculate the average value of the outlet air temperature measured by each temperature sensor to obtain the outlet air temperature of the segment;

Determine the current ambient temperature as the inlet air temperature.

Specifically, in an embodiment, the inlet and outlet water temperatures include inlet water temperature and outlet water temperature, and the first determination module is specifically used for:

Calculate the heat dissipation of each segment based on the following formula:

Q _n =q _n ρ _w c _pw (t _w2n -t _w1n )

Among them, Qn represents the heat dissipation of the _nth sector, qn represents the circulating water flow of the nth sector, _ρw represents the circulating water density, _cpw represents the constant pressure specific heat capacity of the circulating water, and _tw2n represents the _nth fan is the outlet water temperature of the segment, and _tw1n represents the inlet water temperature of the nth sector.

Specifically, in an embodiment, the second determining module is specifically configured to:

Calculate the logarithmic heat transfer temperature difference of each sector based on the following formula:

Among them, Δt _mn represents the logarithmic heat exchange temperature difference of the nth sector, t _w2n represents the outlet water temperature of the nth sector, t _w1n represents the inlet water temperature of the nth sector, and t _a1n represents the nth sector is the inlet air temperature, and t _a2n represents the outlet air temperature of the nth sector.

Specifically, in an embodiment, the third determining module is specifically used for:

Calculate the heat transfer coefficient of each segment based on the following formula:

Among them, k _n represents the heat transfer coefficient of the n-th sector, Q _n represents the heat dissipation of the n-th sector, Δt _mn represents the logarithmic heat transfer temperature difference of the n-th sector, and A _n represents the n-th sector heat dissipation area.

Regarding the device for monitoring the performance of the intermediate cooling tower in this embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be described in detail here.

The device for monitoring the performance of the indirect cooling tower provided in the embodiment of the present application is used to implement the method for monitoring the performance of the indirect cooling tower provided in the above-mentioned embodiment, and the implementation manner is the same as the principle, which will not be repeated.

The embodiment of the present application provides an electronic device for implementing the method for monitoring the performance of the intercooling tower provided by the above embodiment.

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

The memory stores computer-executable instructions; at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor executes the method for monitoring the performance of an indirect cooling tower provided by the above embodiments.

An electronic device provided by an embodiment of the present application is used to execute the method for monitoring the performance of an indirect cooling tower provided by the above-mentioned embodiment. The implementation manner is the same as the principle, and details are not described again.

Embodiments of the present application provide a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when a processor executes the computer-executable instructions, the method for monitoring the performance of an indirect cooling tower provided in any of the above embodiments is implemented.

The storage medium containing the computer-executable instructions of the embodiments of the present application can be used to store the computer-executable instructions of the method for monitoring the performance of the indirect cooling tower provided in the foregoing embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only 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 may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units can be stored in a computer-readable storage medium. The above-mentioned software function unit is stored in a storage medium, and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute the methods described in the various embodiments of the present application. some steps. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

Those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above functional modules is used for illustration. The internal structure is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the apparatus described above, reference may be made to the corresponding process in the foregoing method embodiments, and details are not described herein again.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not 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: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application. scope.

Claims (10)

1. A performance monitoring method for an indirect cooling tower is characterized by comprising the following steps:

acquiring the air inlet and outlet temperature and the water inlet and outlet temperature of each sector in the intercooling tower to be detected;

determining the heat dissipation capacity of each sector according to the temperature of the inlet water and the outlet water and the flow of circulating water;

determining the logarithmic heat exchange temperature difference of each sector according to the air inlet and outlet temperature and the water inlet and outlet temperature;

determining the heat exchange coefficient of each sector according to the heat dissipation capacity, the logarithmic heat exchange temperature difference and the heat dissipation area of each sector;

and determining the performance monitoring result of the indirect cooling tower to be tested according to the heat exchange coefficient of each sector.

2. The method of claim 1, further comprising:

determining the mean value of the air inlet and outlet temperatures of the intercooling tower to be detected according to the mean value calculation result of the air inlet and outlet temperatures of each sector;

determining air density change information of the indirect cooling tower to be tested during air inlet and outlet according to the air inlet and outlet temperature mean value of the indirect cooling tower to be tested and the local actual measurement atmospheric pressure;

determining the lifting value of the indirect cooling tower to be tested in the air according to the air density change information, the effective height of the indirect cooling tower to be tested and the gravity acceleration;

and determining the resistance value of the indirect cooling tower to be detected in the air according to the lift value of the indirect cooling tower to be detected in the air based on the equivalent relationship between the lift value and the resistance value of the indirect cooling tower to be detected in the air.

3. The method of claim 2, comprising:

determining the characteristic air temperature of the indirect cooling tower to be tested according to the average value of the air inlet and outlet temperatures of the indirect cooling tower to be tested;

determining 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 local measured atmospheric pressure;

determining the ventilation volume of each sector according to the characteristic air density of the intercooling tower to be detected, the heat dissipation volume of each sector and the air inlet and outlet temperatures;

determining the windward speed of each sector according to the ventilation volume and the heat dissipation area of each sector;

and aiming at any one sector, when the windward speed of the sector reaches a preset standard, judging whether the sector is a sector to be cleaned according to the relation between the heat exchange coefficient of the sector and a preset threshold value.

4. The method as claimed in claim 1, wherein the finned tubes of each section of the indirect cooling tower to be tested are provided with a plurality of temperature sensors, and the air inlet and outlet temperatures comprise an air inlet temperature and an air outlet temperature, and the obtaining the air inlet and outlet temperature of each section of the indirect cooling tower to be tested comprises:

aiming at any one sector, acquiring the air outlet temperature measured by each temperature sensor in the sector;

calculating the mean value of the air outlet temperature measured by each temperature sensor to obtain the air outlet temperature of the sector;

and determining the current environment temperature as the inlet air temperature.

5. The method of claim 1, wherein said determining heat dissipation for each of said sectors based on said inlet and outlet water temperatures and a flow rate of circulating water comprises:

calculating the heat dissipation capacity of each of the sectors based on the following formula:

Q _n ＝q _n ρ _w c _pw (t _w2n -t _w1n )

wherein Q is _n Represents the heat dissipation of the nth sector, q _n Represents the circulating water flow of the nth sector, p _w Denotes circulating water density, c _pw Represents the specific heat capacity of circulating water at constant pressure, t _w2n Showing the outlet water temperature of the nth sector, t _w1n The inlet water temperature of the nth sector is indicated.

6. The method of claim 1, wherein said determining a logarithmic heat exchange temperature difference for each of said sectors based on said inlet and outlet air temperatures and inlet and outlet water temperatures comprises:

calculating the logarithmic heat exchange temperature difference of each sector based on the following formula:

wherein, Δ t _mn Represents the logarithmic heat exchange temperature difference of the nth sector, t _w2n Showing the outlet water temperature of the nth sector, t _w1n Denotes the temperature of the water supply to the nth sector, t _a1n Representing the temperature of the inlet air of the nth sector, t _a2n The outlet air temperature of the nth sector is shown.

7. The method of claim 1, wherein determining the heat transfer coefficient for each of the sectors based on the heat dissipation capacity, the logarithmic heat transfer temperature difference, and the heat dissipation area of each of the sectors comprises:

calculating the heat exchange coefficient of each sector based on the following formula:

wherein k is _n Denotes the heat transfer coefficient, Q, of the nth sector _n Represents the heat dissipation of the nth sector, Δ t _mn Represents the logarithmic heat exchange temperature difference of the nth sector, A _n The heat dissipation area of the nth sector is shown.

8. An indirect cooling tower performance monitoring device, comprising:

the acquisition module is used for acquiring the air inlet and outlet temperature and the water inlet and outlet temperature of each sector in the intercooling tower to be detected;

the first determining module is used for determining the heat dissipation capacity of each sector according to the temperature of the inlet water and the temperature of the outlet water and the flow of circulating water;

the second determining module is used for determining the logarithmic heat exchange temperature difference of each sector according to the air inlet and outlet temperature and the water inlet and outlet temperature;

the third determining module is used for determining the heat exchange coefficient of each sector according to the heat dissipation capacity, the logarithmic heat exchange temperature difference and the heat dissipation area of each sector;

and the monitoring module is used for determining a performance monitoring result of the indirect cooling tower to be tested according to the heat exchange coefficient of each sector.

9. An electronic device, comprising: at least one processor and a memory;

the memory stores computer-executable instructions;

the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the method of any of claims 1-7.

10. A computer-readable storage medium having stored thereon computer-executable instructions which, when executed by a processor, implement the method of any one of claims 1 to 7.

Images