CN112730516B - Real-time monitoring method and device for wet bulb temperature approximation degree of cooling tower - Google Patents
Real-time monitoring method and device for wet bulb temperature approximation degree of cooling tower Download PDFInfo
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- CN112730516B CN112730516B CN202011615394.3A CN202011615394A CN112730516B CN 112730516 B CN112730516 B CN 112730516B CN 202011615394 A CN202011615394 A CN 202011615394A CN 112730516 B CN112730516 B CN 112730516B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
- G01N25/62—Investigating or analyzing materials by the use of thermal means by investigating moisture content by psychrometric means, e.g. wet-and-dry bulb thermometers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/003—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus specially adapted for cooling towers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention is suitable for the technical field of energy, and provides a method and a device for monitoring wet bulb temperature approximation degree of a cooling tower in real time, wherein the method comprises the following steps: acquiring the current inlet water temperature of a condenser of the refrigerator; acquiring the current dry bulb temperature and the current wet bulb temperature of the atmosphere environment; calculating a lower tower water temperature of the cooling tower based on the inlet water temperature and the dry bulb temperature; and subtracting the lower tower water temperature from the wet bulb temperature to obtain the wet bulb temperature approximation degree of the cooling tower, and displaying the wet bulb temperature approximation degree of the cooling tower. According to the invention, the real-time monitoring of the wet bulb temperature approximation degree of the cooling tower is realized by calculating the lower tower water temperature of the cooling tower, and the prompt effect on abnormal heat dissipation of the cooling tower is realized.
Description
Technical Field
The invention belongs to the technical field of energy, and particularly relates to a method and a device for monitoring wet bulb temperature approximation degree of a cooling tower in real time.
Background
The heat dissipation effect of the cooling tower can be evaluated by using the wet bulb temperature approximation degree of the cooling tower, and the wet bulb temperature approximation degree of the cooling tower can be calculated by subtracting the lower tower water temperature of the cooling tower to calculate the wet bulb temperature of the atmosphere environment. When the wet bulb temperature of the cooling tower is higher than a reasonable range, the cooling effect of the cooling tower is often represented to be poor, and the cooling water temperature of the refrigerator is higher, so that the high pressure of the refrigerator is higher, and finally, the energy consumption of the refrigerator is overlarge, and even potential safety hazards are generated. The reason for the phenomenon of overlarge wet bulb temperature approximation is often that the cooling tower is internally blocked, the heat dissipation is seriously influenced by the breeding of organic matters, or the cooling tower is poor in cooling effect due to ageing of filling materials and the like. At this time, the cooling tower needs to be cleaned to recover the heat dissipation capability. However, the cooling towers on the market at present often do not have a controller and a control cabinet, and a sensor for the water temperature of the lower tower is not configured, so that the heat dissipation condition of the cooling tower and the digital work for evaluating the heat dissipation effect of the cooling tower cannot be obtained in real time. Meanwhile, a lower tower water pan of the cooling tower is generally arranged on the roof and needs to be subjected to pipe breaking construction, so that how to monitor the wet bulb temperature approximation degree of the cooling tower is a technical problem to be solved currently.
Disclosure of Invention
In view of the above, the invention provides a real-time monitoring method and device for wet bulb temperature of a cooling tower, which are used for solving the problem that the wet bulb temperature of the cooling tower cannot be monitored in real time due to the fact that the lower tower temperature of the cooling tower is objectively difficult to collect in the prior art.
In a first aspect of the embodiment of the present invention, a method for monitoring the wet bulb temperature proximity of a cooling tower in real time is provided, including:
acquiring the current inlet water temperature of a condenser of the refrigerator;
acquiring the current dry bulb temperature and the current wet bulb temperature of the atmosphere environment;
calculating a lower tower water temperature of the cooling tower based on the inlet water temperature and the dry bulb temperature;
subtracting the lower tower water temperature from the wet bulb temperature to obtain a cooling tower wet bulb temperature approximation degree, and displaying the cooling tower wet bulb temperature approximation degree, wherein a calculation formula of the cooling tower wet bulb temperature approximation degree is as follows:
T＝T cwIn -k×(T atmosp -T cwIn )-T atm ，
wherein T is the wet bulb temperature approximation degree, T cwIn For the inlet water temperature, T atmosp T is the dry bulb temperature atm And k is the lower tower temperature coefficient for the wet bulb temperature.
In some embodiments, subtracting the lower tower water temperature from the wet bulb temperature to obtain a cooling tower wet bulb temperature approximation, and displaying the cooling tower wet bulb temperature approximation, further comprising:
judging whether the wet bulb temperature approximation degree of the cooling tower meets a preset condition or not;
if not, sending out early warning information to prompt the user.
In some embodiments, the lower column temperature coefficient k is calculated as:
k＝K×F/(Cp×M)；
wherein K is the heat dissipation coefficient of the environment atmosphere and the cooling water pipe, F is the heat dissipation area of the cooling water pipe, cp is the constant pressure specific heat capacity of water, and M is the mass flow of water.
In some embodiments, calculating the lower tower water temperature of the cooling tower based on the inlet water temperature and the dry bulb temperature specifically includes:
calculating the heat dissipation capacity of the cooling water pipe based on a heat transfer formula;
according to the cooling water pipe heat dissipation capacity, calculating a temperature difference delta t of the cooling water temperature rise corresponding to the cooling water pipe heat dissipation capacity;
and calculating the lower tower water temperature of the cooling tower according to the inlet water temperature, the dry bulb temperature and the temperature difference.
In some embodiments, the cooling water pipe heat dissipation capacity is calculated by the following formula:
Q＝K×F×(T atmosp -T cwIn )；
wherein Q is the heat dissipation capacity of the cooling water pipe, K is the heat dissipation coefficient of the environment atmosphere and the cooling water pipe, F is the heat dissipation area of the cooling water pipe, T atmosp Is the ambient atmospheric dry bulb temperature, T cwIn Is the inlet water temperature.
In some embodiments, the temperature difference Δt is calculated as:
△t＝T cwIn -T tower ＝Q/(Cp×M)，
then T is cwIn -T tower ＝K×F×(T atmosp -T cwIn )/(Cp×M)；
Wherein T is tower For the lower water temperature of the cooling tower, cp is the constant pressure specific heat capacity of water, and M is the mass flow of water.
In some embodiments, the lower tower water temperature of the cooling tower is calculated as:
T tower ＝T cwIn -K×F×(T atmosp -T cwIn )/(Cp×M)。
in a second aspect of the embodiment of the present invention, there is provided a real-time monitoring device for wet bulb temperature proximity of a cooling tower, including:
the inlet water temperature acquisition module is used for acquiring the current inlet water temperature of the condenser of the refrigerator;
the environment temperature acquisition module is used for acquiring the current dry bulb temperature and the current wet bulb temperature of the atmospheric environment;
a lower tower water temperature calculation module for calculating a lower tower water temperature of the cooling tower based on the inlet water temperature and the dry bulb temperature;
the approximation degree calculating module is used for subtracting the wet bulb temperature from the lower tower water temperature to obtain the approximation degree of the wet bulb temperature of the cooling tower, displaying the approximation degree of the wet bulb temperature of the cooling tower, and the calculation formula of the approximation degree of the wet bulb temperature of the cooling tower is as follows:
T＝T atm -T cwIn +k×(T atmosp -T cwIn )，
wherein T is the wet bulb temperature approximation degree, T cwIn For the inlet water temperature, T atmosp T is the dry bulb temperature atm And k is the lower tower temperature coefficient for the wet bulb temperature.
In a third aspect of the embodiment of the present invention, a terminal device is provided, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements the steps of the cooling tower wet bulb temperature proximity real-time monitoring method when executing the computer program.
In a fourth aspect of the embodiments of the present invention, there is provided a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the cooling tower wet bulb temperature proximity real-time monitoring method.
The real-time monitoring method for the wet bulb temperature of the cooling tower has the advantages that: the embodiment of the invention provides a real-time monitoring method for wet bulb temperature approximation degree of a cooling tower, which comprises the steps of obtaining the current inlet water temperature of a condenser of a refrigerator, the current dry bulb temperature of an atmospheric environment and the current wet bulb temperature; then calculating the lower tower water temperature of the cooling tower based on the inlet water temperature, the dry bulb temperature and a heat transfer formula; and finally, subtracting the wet bulb temperature from the lower tower water temperature to obtain the wet bulb temperature approximation degree of the cooling tower, and displaying the wet bulb temperature approximation degree of the cooling tower. According to the invention, the inlet water temperature and the dry bulb temperature are obtained, so that the lower tower water temperature of the cooling tower is calculated; the wet bulb temperature approximation degree of the cooling tower is calculated through the wet bulb temperature and the lower tower water temperature, so that the problem that the wet bulb temperature approximation degree of the cooling tower cannot be monitored in real time due to the fact that the lower tower temperature of the cooling tower is objectively difficult to collect is solved. The wet bulb temperature proximity is a parameter used for measuring the heat dissipation effect of the cooling tower, and the effect of monitoring the heat dissipation condition of the cooling tower on line in real time is achieved by monitoring the wet bulb temperature proximity of the cooling tower, so that a user and a supervision department can know the operation condition of the cooling tower in time. The invention also plays a role in prompting a user by sending out early warning information when the wet bulb temperature approximation degree of the cooling tower does not accord with the preset condition.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for monitoring the wet bulb temperature proximity of a cooling tower in real time according to an embodiment of the invention;
FIG. 2 is a flowchart of a process for calculating a lower tower water temperature of the cooling tower based on the inlet water temperature, the dry bulb temperature and a heat transfer formula according to an embodiment of the present invention;
FIG. 3 is a flowchart of the early warning message prompt provided in the embodiment of the present invention;
FIG. 4 is a flow chart of a real-time monitoring device for wet bulb temperature of a cooling tower provided by an embodiment of the invention;
fig. 5 is a schematic diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention. The technical means used in the examples are conventional means well known to those skilled in the art unless otherwise indicated.
In order to illustrate the technical scheme of the invention, the following description is made by specific examples.
First embodiment
FIG. 1 is a flow chart of a method for real-time monitoring of wet bulb temperature of a cooling tower according to one embodiment of the present invention.
As shown in FIG. 1, the real-time monitoring method for the wet bulb temperature of the cooling tower comprises the following steps of S110-S140:
s110, acquiring the current inlet water temperature of a condenser of the refrigerator;
s120, acquiring the current dry bulb temperature and the current wet bulb temperature of the atmosphere environment;
s130, calculating the lower tower water temperature of the cooling tower based on the inlet water temperature and the dry bulb temperature;
and S140, subtracting the lower tower water temperature from the wet bulb temperature to obtain the wet bulb temperature approximation degree of the cooling tower, and displaying the wet bulb temperature approximation degree of the cooling tower.
The embodiment of the invention provides a real-time monitoring method for wet bulb temperature approximation degree of a cooling tower, which comprises the steps of obtaining the current inlet water temperature of a condenser of a refrigerator, the current dry bulb temperature of an atmospheric environment and the current wet bulb temperature; then calculating the lower tower water temperature of the cooling tower based on the inlet water temperature, the dry bulb temperature and a heat transfer formula; and finally, subtracting the wet bulb temperature from the lower tower water temperature to obtain the wet bulb temperature approximation degree of the cooling tower, and displaying the wet bulb temperature approximation degree of the cooling tower. The method calculates the lower tower water temperature of the cooling tower by acquiring the inlet water temperature and the dry bulb temperature; the wet bulb temperature approximation degree of the cooling tower is calculated through the wet bulb temperature and the lower tower water temperature, so that the problem that the wet bulb temperature approximation degree of the cooling tower cannot be monitored in real time due to the fact that the lower tower temperature of the cooling tower is objectively difficult to collect is solved. The wet bulb temperature approach degree is a parameter used for measuring the heat dissipation effect of the cooling tower, and the method achieves the effect of monitoring the heat dissipation condition of the cooling tower on line in real time by monitoring the wet bulb temperature approach degree of the cooling tower, so that a user and a supervision department can know the operation condition of the cooling tower in time.
Specifically, the inlet and outlet water temperatures of the condenser of the refrigerator are always already installed when the refrigerator leaves the factory, signals are input into the PLC of the refrigerator, and the water temperature data of the PLC of the refrigerator can be read by means of the communication interface to obtain the current inlet water temperature of cooling water. The cooling tower is a cooling tower matched with a water-cooled electric refrigerator, and the water inlet of the condenser of the refrigerator is connected with the lower tower of the cooling tower through a water pipe, so that the inlet water temperature and the lower tower water temperature of the cooling tower often have a certain deviation, and the deviation is the temperature dissipation of the cooling water pipe from the cooling tower to the section of the refrigerator. The greater the difference between ambient temperature and water temperature, the greater the dissipation. The current dry bulb temperature and the current wet bulb temperature of the atmosphere environment can be acquired by a temperature sensor.
Specifically, if the inlet and outlet water temperature of the refrigerator is directly used to replace the water temperature of the lower tower of the cooling tower, certain errors can be generated, and the errors generate heat dissipation losses in the pipeline. The cooling water pipe from the cooling tower to the refrigerator is not always insulated, the length is often tens of meters to tens of meters, at the moment, the heat transfer of the ambient temperature to the cooling water pipe often causes the temperature rise of the cooling water, at the moment, the water temperature at the inlet and outlet of the refrigerator is higher than the water temperature at the lower tower of the cooling tower, and the obtained temperature value has a certain error. It is therefore proposed herein to calculate the cooling tower lower tower water temperature using the cooling water inlet water temperature in combination with the ambient dry bulb temperature correction. The method adopts the inlet water temperature in the refrigerator PLC to calculate the lower tower water temperature of the cooling tower, and corrects the lower tower water temperature of the cooling tower by proper environmental temperature dissipation, and obtains the lower tower water temperature of the cooling tower which is as close to the actual value as possible under the condition of no related object connection point.
Specifically, referring to fig. 2, fig. 2 is a flowchart showing a flow of calculating a lower tower water temperature of the cooling tower based on the inlet water temperature, the dry bulb temperature and a heat transfer formula according to an embodiment of the present invention.
As shown in fig. 2, calculating the lower tower water temperature of the cooling tower based on the inlet water temperature, the dry bulb temperature and the heat transfer formula may specifically include the following steps S210 to S230:
s210, calculating the heat dissipation capacity of the cooling water pipe based on a heat transfer formula;
s220, according to the cooling water pipe heat dissipation capacity, calculating a temperature difference delta t of the cooling water temperature rise corresponding to the cooling water pipe heat dissipation capacity;
s230, calculating the lower tower water temperature of the cooling tower according to the inlet water temperature, the dry bulb temperature and the temperature difference.
Specifically, the formula for calculating the heat dissipation capacity of the cooling water pipe is as follows:
Q＝K×F×(T atmosp -T cwIn )；
wherein Q is the heat dissipation capacity of the cooling water pipe, K is the heat dissipation coefficient of the environment atmosphere and the cooling water pipe, F is the heat dissipation area of the cooling water pipe, T atmosp Is the ambient atmospheric dry bulb temperature, T cwIn Is the inlet water temperature.
The calculation formula of the temperature difference Deltat is as follows:
△t＝T cwIn -T tower ＝Q/(Cp×M)，
then T is cwIn -T tower ＝K×F×(T atmosp -T cwIn )/(Cp×M)；
Wherein T is tower For the lower water temperature of the cooling tower, cp is the constant pressure specific heat capacity of water, and M is the mass flow of water.
Therefore, the calculation formula of the lower tower water temperature of the cooling tower is:
T tower ＝T cwIn -K×F×(T atmosp -T cwIn )/(Cp×M)。
let k=k×f/(cp×m),
T＝T atm -T tower ，
then t=t atm -T cwIn +k×(T atmosp -T cwIn )，
Wherein T is the wet bulb temperature approximation degree, T cwIn For the inlet water temperature, T atmosp T is the dry bulb temperature atm For the wet bulb temperature, k isLower column temperature coefficient.
Specifically, wet bulb temperature proximity is a parameter used to measure how well a cooling tower dissipates heat. The cooling tower uses the air of the environment atmosphere to cool the cooling water, the cooling treatment mainly comprises evaporation and convection, and the evaporation accounts for the majority. The wet bulb temperature of the atmosphere is a determining function to the temperature of the cooled cooling water, so the difference between the wet bulb temperature of the atmosphere and the lower tower water temperature of the cooling tower is often used in industry to represent the cooling effect of the cooling tower. Often this value will be in a reasonable range, for example 2-4 c etc. According to the method, the wet bulb temperature approach degree of the cooling tower is calculated through the inlet water temperature of the refrigerant, the dry bulb temperature and the wet bulb temperature of the atmosphere, so that the wet bulb temperature approach degree of the cooling tower is monitored; and the user is reminded of processing abnormality through the condition that the wet bulb temperature of the cooling tower approaches.
Specifically, referring to fig. 3, fig. 3 is a flowchart of a flow of the early warning information prompt provided in an embodiment of the present invention according to the approach of the wet bulb temperature of the cooling tower.
As shown in FIG. 3, the warning message prompt may specifically include the following steps S310-S320:
s310, judging whether the wet bulb temperature approximation degree of the cooling tower meets a preset condition or not;
s320, if not, sending out early warning information to prompt a user.
Specifically, in step S310, before determining whether the wet bulb temperature proximity of the cooling tower meets the preset condition, the method further includes: and setting preset conditions.
Specifically, the preset condition is that the wet bulb temperature of the cooling tower approaches a reasonable range, and the reasonable range can be set empirically, for example, 2-4 ℃. When the wet bulb temperature of the cooling tower is higher than a reasonable range, the cooling effect of the cooling tower is often represented to be poor, and the cooling water temperature of the refrigerator is higher, so that the high pressure of the refrigerator is higher, and finally, the energy consumption of the refrigerator is overlarge, and even potential safety hazards are generated. The reason for the phenomenon of overlarge wet bulb temperature approximation is often that the cooling tower is internally blocked, the heat dissipation is seriously influenced by the breeding of organic matters, or the cooling tower is poor in cooling effect due to ageing of filling materials and the like. At this time, the cooling tower needs to be cleaned to recover the heat dissipation capability.
In this embodiment, according to the condition of the wet bulb temperature approach degree of the cooling tower, whether the wet bulb temperature approach degree of the cooling tower is abnormal or not is judged, and a user is reminded of processing the abnormality. The user can treat the abnormality, thereby achieving the purposes of improving the operation safety of the cooling tower and improving the heat dissipation effect of the cooling tower.
Second embodiment
Based on the same inventive concept as the method in the first embodiment, correspondingly, the embodiment also provides a real-time monitoring device for the wet bulb temperature approximation degree of the cooling tower.
Fig. 4 is a flow chart of the real-time monitoring device for wet bulb temperature of the cooling tower.
As shown in fig. 4, the illustrated device 4 comprises: 41 inlet water temperature acquisition module, 42 ambient temperature acquisition module, 43 lower tower water temperature calculation module and 44 approximation calculation module.
The inlet water temperature acquisition module is used for acquiring the current inlet water temperature of the condenser of the refrigerator.
The environment temperature acquisition module is used for acquiring the current dry bulb temperature and the current wet bulb temperature of the atmospheric environment.
And the lower tower water temperature calculation module is used for calculating the lower tower water temperature of the cooling tower based on the inlet water temperature and the dry bulb temperature.
The approximation degree calculating module is used for subtracting the lower tower water temperature from the wet bulb temperature to obtain the approximation degree of the wet bulb temperature of the cooling tower, displaying the approximation degree of the wet bulb temperature of the cooling tower, and the calculation formula of the approximation degree of the wet bulb temperature of the cooling tower is as follows:
T＝T atm -T cwIn +k×(T atmosp -T cwIn )，
wherein T is the wet bulb temperature approximation degree, T cwIn For the inlet water temperature, T atmosp T is the dry bulb temperature atm And k is the lower tower temperature coefficient for the wet bulb temperature.
In some exemplary embodiments, the lower tower water temperature calculation module specifically includes:
the cooling water pipe heat dissipation capacity calculation unit is used for calculating the cooling water pipe heat dissipation capacity based on a heat transfer formula;
the formula for calculating the heat dissipation capacity of the cooling water pipe is as follows:
Q＝K×F×(T atmosp -T cwIn )；
wherein Q is the heat dissipation capacity of the cooling water pipe, K is the heat dissipation coefficient of the environment atmosphere and the cooling water pipe, F is the heat dissipation area of the cooling water pipe, T atmosp Is the ambient atmospheric dry bulb temperature, T cwIn Is the inlet water temperature.
The temperature difference calculation unit is used for calculating the temperature difference delta t of the cooling water temperature rise corresponding to the cooling water pipe heat dissipation capacity according to the cooling water pipe heat dissipation capacity;
the calculation formula of the temperature difference Deltat is as follows:
△t＝T cwIn -T tower ＝Q/(Cp×M)，
then T is cwIn -T tower ＝K×F×(T atmosp -T cwIn )/(Cp×M)；
Wherein T is tower For the lower water temperature of the cooling tower, cp is the constant pressure specific heat capacity of water, and M is the mass flow of water.
A lower tower water temperature calculation unit for calculating the lower tower water temperature of the cooling tower according to the inlet water temperature, the dry bulb temperature and the temperature difference;
the calculation formula of the lower tower water temperature of the cooling tower is as follows:
T tower ＝T cwIn -K×F×(T atmosp -T cwIn )/(Cp×M)。
in some exemplary embodiments, the apparatus further comprises:
the judging module is used for judging whether the wet bulb temperature approximation degree of the cooling tower meets a preset condition or not;
and the early warning prompt module is used for sending early warning information to prompt a user if the early warning prompt module is not used for sending the early warning information to prompt the user.
Third embodiment
The method and the device can be applied to terminal equipment such as desktop computers, notebooks, palm computers and cloud servers.
Fig. 5 is a schematic diagram of a terminal device to which the above method and apparatus can be applied, provided in an embodiment of the present invention, where the device 5 includes a memory 51, a processor 50, and a computer program 52 stored in the memory 51 and capable of running on the processor 50, and the steps of the method for monitoring the wet bulb temperature proximity of the cooling tower in real time are implemented when the processor 50 executes the computer program 52. Such as the functions of modules 41 to 44 shown in fig. 4.
The device 5 may be a computing device such as a cloud server. The terminal device may include, but is not limited to, a processor 50, the memory 51. It will be appreciated by those skilled in the art that fig. 5 is merely an example of the device 5 and does not constitute a limitation of the terminal device 5, and may include more or less components than illustrated, or may combine certain components, or different components, e.g., the terminal device may further include an input-output device, a network access device, a bus, etc.
The processor 50 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSPs), application specific integrated circuits (Application Specific Integrated Circuit, ASICs), field programmable gate arrays (Field-Programmable Gate Array, FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 51 may be an internal storage unit of the device 5, such as a hard disk or a memory of the device 5. The memory 51 may also be an external storage device of the device 5, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the device 5. Further, the memory 51 may also include both an internal storage unit and an external storage device of the device 5. The memory 51 is used for storing the computer program as well as other programs and data required by the terminal device. The memory 51 may also be used to temporarily store data that has been output or is to be output.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present application may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each method embodiment described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
Specifically, as follows, the present embodiment further provides a computer readable storage medium, which may be a computer readable storage medium contained in the memory in the above embodiment; or may be a computer-readable storage medium, alone, that is not incorporated into the terminal device. The computer readable storage medium stores one or more computer programs:
the computer readable storage medium comprises a computer program stored in the computer readable storage medium, and the computer program realizes the steps of the cooling tower wet bulb temperature proximity real-time monitoring method when being executed by a processor.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other manners. For example, the apparatus/terminal device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (8)
1. The real-time monitoring method for the wet bulb temperature of the cooling tower is characterized by comprising the following steps of:
acquiring the current inlet water temperature of a condenser of the refrigerator;
acquiring the current dry bulb temperature and the current wet bulb temperature of the atmosphere environment;
calculating a lower tower water temperature of the cooling tower based on the inlet water temperature and the dry bulb temperature;
subtracting the lower tower water temperature from the wet bulb temperature to obtain a cooling tower wet bulb temperature approximation degree, and displaying the cooling tower wet bulb temperature approximation degree, wherein a calculation formula of the cooling tower wet bulb temperature approximation degree is as follows:
T＝T atm -T cwIn +k×(T atmosp -T cwIn )，
wherein T is the wet bulb temperature approximation degree, T cwIn For the inlet water temperature, T atmosp T is the dry bulb temperature atm K is the lower tower temperature coefficient for the wet bulb temperature;
the calculation formula of the lower tower temperature coefficient k is as follows:
k＝K×F/(Cp×M)；
wherein K is the heat dissipation coefficient of the environment atmosphere and the cooling water pipe, F is the heat dissipation area of the cooling water pipe, cp is the constant pressure specific heat capacity of water, and M is the mass flow of water;
subtracting the lower tower water temperature from the wet bulb temperature to obtain a wet bulb temperature approximation degree of the cooling tower, and displaying the wet bulb temperature approximation degree of the cooling tower, wherein the method further comprises the following steps:
judging whether the wet bulb temperature approximation degree of the cooling tower meets a preset condition or not;
if not, sending out early warning information to prompt the user.
2. The method according to claim 1, characterized in that calculating a lower tower water temperature of the cooling tower based on the inlet water temperature and the dry bulb temperature, in particular comprises:
calculating the heat dissipation capacity of the cooling water pipe based on a heat transfer formula;
according to the cooling water pipe heat dissipation capacity, calculating a temperature difference delta t of the cooling water temperature rise corresponding to the cooling water pipe heat dissipation capacity;
and calculating the lower tower water temperature of the cooling tower according to the inlet water temperature, the dry bulb temperature and the temperature difference.
3. The method according to claim 2, wherein the cooling water pipe heat dissipation capacity is calculated by the formula:
Q＝K×F×(T atmosp -T cwIn )；
wherein Q is the heat dissipation capacity of the cooling water pipe, K is the heat dissipation coefficient of the environment atmosphere and the cooling water pipe, F is the heat dissipation area of the cooling water pipe, T atmosp Is the ambient atmospheric dry bulb temperature, T cwIn Is the inlet water temperature.
4. A method according to claim 3, characterized in that the temperature difference Δt is calculated by the formula:
△t＝T cwIn -T tower ＝Q/(Cp×M)，
then T is cwIn -T tower ＝K×F×(T atmosp -T cwIn )/(Cp×M)；
Wherein T is tower For the lower water temperature of the cooling tower, cp is the constant pressure specific heat capacity of water, and M is the mass flow of water.
5. The method according to claim 4, wherein the calculation formula of the lower tower water temperature of the cooling tower is:
T tower ＝T cwIn -K×F×(T atmosp -T cwIn )/(Cp×M)。
6. real-time monitoring device of cooling tower wet bulb temperature approximation, its characterized in that, the device includes:
the inlet water temperature acquisition module is used for acquiring the current inlet water temperature of the condenser of the refrigerator;
the environment temperature acquisition module is used for acquiring the current dry bulb temperature and the current wet bulb temperature of the atmospheric environment;
a lower tower water temperature calculation module for calculating a lower tower water temperature of the cooling tower based on the inlet water temperature and the dry bulb temperature;
the approximation degree calculating module is used for subtracting the lower tower water temperature from the wet bulb temperature to obtain the approximation degree of the wet bulb temperature of the cooling tower, displaying the approximation degree of the wet bulb temperature of the cooling tower, and the calculation formula of the approximation degree of the wet bulb temperature of the cooling tower is as follows:
T＝T atm -T cwIn +k×(T atmosp -T cwIn )，
wherein T is the wet bulb temperature approximation degree, T cwIn For the inlet water temperature, T atmosp T is the dry bulb temperature atm K is the lower tower temperature coefficient for the wet bulb temperature;
the calculation formula of the lower tower temperature coefficient k is as follows:
k＝K×F/(Cp×M)；
wherein K is the heat dissipation coefficient of the environment atmosphere and the cooling water pipe, F is the heat dissipation area of the cooling water pipe, cp is the constant pressure specific heat capacity of water, and M is the mass flow of water;
the apparatus further comprises:
the judging module is used for judging whether the wet bulb temperature approximation degree of the cooling tower meets a preset condition or not;
and the early warning prompt module is used for sending early warning information to prompt a user if the early warning prompt module is not used for sending the early warning information to prompt the user.
7. An apparatus comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any one of claims 1 to 5 when the computer program is executed.
8. A storage medium storing a computer program which, when executed by a processor, implements the steps of the method according to any one of claims 1 to 5.
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| CN110686345A (en) * | 2019-11-18 | 2020-01-14 | 深圳市励科机电科技工程有限公司 | Efficient building refrigerating machine room and control method thereof |
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| US4507930A (en) * | 1984-03-23 | 1985-04-02 | The Babcock & Wilcox Company | Cooling tower monitor |
| CN109163599A (en) * | 2018-10-31 | 2019-01-08 | 上海大众祥源动力供应有限公司 | A kind of cooling tower monitoring system and its application |
| CN111125931B (en) * | 2019-12-31 | 2021-09-14 | 珠海格力电器股份有限公司 | Automatic optimization type searching method and device for cooling tower |
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| CN104838213A (en) * | 2013-01-31 | 2015-08-12 | 三菱重工业株式会社 | Heat source system, and device and method for controlling cooling water supply device |
| CN110686345A (en) * | 2019-11-18 | 2020-01-14 | 深圳市励科机电科技工程有限公司 | Efficient building refrigerating machine room and control method thereof |
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