CN114909312A - Fan control method and system of air cooling system and electronic equipment - Google Patents
Fan control method and system of air cooling system and electronic equipment Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- 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 relates to the technical field of air cooling systems, in particular to a fan control method, a fan control system and electronic equipment of an air cooling system, wherein the method comprises the following steps: calculating the weight corresponding to each fan according to the environmental parameters, the fan state, the fan starting state and the fan operation interval parameters of the fan in each heat exchanger in the air cooling system; and determining the fan corresponding to the maximum weight as a starting fan and controlling the operation. By comprehensively considering factors such as the ambient environment and the performance states among different fans when the air cooling system operates and automatically selecting the optimal fan, namely the fan corresponding to the maximum weight to operate, the air cooling system can achieve the purposes of maximum heat exchange amount and automatic regulation and control under different environments, and the operation and maintenance process of the air cooling system can be further simplified.
Description
Technical Field
The invention relates to the technical field of air cooling systems, in particular to a fan control method and system of an air cooling system and electronic equipment.
Background
The air cooling system is widely applied to the fields of chemical production, electric power transmission, steel forging and the like due to the characteristics of simplicity, easiness in use, low operation and maintenance cost, low demand on water resources and the like. However, the air cooling system is often located in an open environment, and is easily affected by ambient temperature, wind direction and wind speed, so that the inlet temperature and pressure of each heat exchanger in the air cooling system are different, the working states of fans in different heat exchangers are different, and further the difference of heat exchange amount is caused. Therefore, the fan is used as main power equipment in the air cooling system, and has important significance for optimizing the operation of the fan.
At the initial design stage of the current air cooling system, the design is carried out by meeting the heat dissipation requirement of equipment under the working condition of extreme environment, so that in winter, transition season and a state with lower heat dissipation requirement, fans in the air cooling system are not all started, and the running number and the starting mode of the fans are controlled according to a set sequence and a corresponding outlet temperature set value of the air cooling system. At present, the starting sequence of the fans is sequentially selected according to a set fixed sequence, the influence of the surrounding environment and the state of the fans cannot be considered, the sequence cannot be adaptively adjusted according to the environment, and the economy is poor.
Therefore, it is necessary to improve the fan control strategy of the air cooling system, so that the maximum heat exchange amount and automatic regulation and control can be realized in different environments.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a fan control method and system of an air cooling system and electronic equipment.
The technical scheme of the fan control method of the air cooling system is as follows:
calculating the weight corresponding to each fan according to the environmental parameters, the fan state, the fan starting state and the fan operation interval parameters of the fan in each heat exchanger in the air cooling system;
and determining the fan corresponding to the maximum weight as a starting fan and controlling the starting.
The fan control method of the air cooling system has the following beneficial effects:
by comprehensively considering factors such as the ambient environment and the performance states among different fans when the air cooling system operates and automatically selecting the optimal fan, namely the fan corresponding to the maximum weight to operate, the air cooling system can achieve the purposes of maximum heat exchange amount and automatic regulation and control under different environments, and the operation and maintenance process of the air cooling system can be further simplified.
The technical scheme of the fan control system of the air cooling system is as follows:
comprises a calculation module and a determination starting module;
the calculation module is configured to: calculating the weight corresponding to each fan according to the environmental parameters, the fan state, the fan starting state and the fan operation interval parameters of the fan in each heat exchanger in the air cooling system;
and the starting determining module is used for determining the fan corresponding to the maximum weight as a starting fan and controlling the operation.
The fan control system of the air cooling system has the following beneficial effects:
by comprehensively considering factors such as the ambient environment and the performance states among different fans when the air cooling system operates and automatically selecting the optimal fan, namely the fan corresponding to the maximum weight to operate, the air cooling system can achieve the purposes of maximum heat exchange amount and automatic regulation and control under different environments, and the operation and maintenance process of the air cooling system can be further simplified.
The technical scheme of the electronic equipment is as follows:
the method comprises a memory, a processor and a program stored in the memory and running on the processor, wherein the processor executes the program to realize the steps of the fan control method of the air cooling system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic flow chart illustrating a method for controlling a fan of an air cooling system according to an embodiment of the present invention;
FIG. 2 is a diagram showing the relationship between pressure and air volume;
FIG. 3 is a schematic diagram of the positions of the pressure measuring points and the temperature measuring points at the inlet of the heat exchanger;
fig. 4 is a schematic structural diagram of a fan control system of an air cooling system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a method for controlling a fan of an air cooling system according to an embodiment of the present invention includes the following steps:
s1, calculating the weight corresponding to each fan according to the environmental parameters, the fan state, the fan starting state and the fan operation interval parameters of the fan in each heat exchanger in the air cooling system;
and S2, determining the fan corresponding to the maximum weight as a starting fan and controlling the starting.
By comprehensively considering factors such as the ambient environment and the performance states among different fans when the air cooling system operates and automatically selecting the optimal fan, namely the fan corresponding to the maximum weight to operate, the air cooling system can achieve the purposes of maximum heat exchange amount and automatic regulation and control under different environments, and the operation and maintenance process of the air cooling system can be further simplified.
Before S1, obtaining the current outlet temperature of the air cooling system through an outlet temperature monitoring device of the air cooling system, and determining whether the current outlet temperature is lower than a set threshold, when the current outlet temperature is higher than the set threshold, starting to execute S1, and when the current outlet temperature is lower than the set threshold, not starting any fan.
Wherein the execution frequency of S1-S2 is also set, such as every 5 minutes, every 10 minutes.
Preferably, in the above technical solution, in S1, the calculating the weight corresponding to each fan according to the environmental parameter, the fan state, the fan start state, and the fan operation interval parameter of the fan in each heat exchanger includes:
s10, obtaining an environment parameter matrix alpha according to the environment parameters of each fan;
s11, obtaining a fan state matrix beta according to the fan state of each fan;
s12, obtaining a fan starting matrix gamma according to the fan starting state of each fan;
s13, obtaining a fan operation interval matrix delta according to the fan operation interval parameters of each fan;
and S14, calculating a total weight matrix according to the environment parameter matrix alpha, the fan state matrix beta, the fan starting matrix gamma and the fan operation interval matrix delta, and acquiring the weight corresponding to each fan from the total weight matrix.
Preferably, in the above technical solution, before obtaining the environment parameter matrix α according to the environment parameter of each fan, that is, before S10, the method further includes:
s010, obtaining theoretical heat exchange quantity added by each heat exchanger after a fan of each heat exchanger is started according to operation data of each heat exchanger in the air cooling system, and sequencing all the theoretical heat exchange quantities according to a sequence from large to small to obtain a sequencing sequence;
obtaining an environmental parameter matrix alpha according to the environmental parameters of the fan in each heat exchanger, that is, S10 includes:
s100, obtaining a first weight alpha corresponding to the ith fan by using a first formula i Until the first weight corresponding to each fan is obtained, and the first weights corresponding to each fan are arranged according to a preset sequence to form an environment parameter matrix alpha with dimension of mx 1, where the first formula is as follows:
wherein n is i Indicating the serial number of the ith fan in the sorting sequence, and m indicating the total number of all fans.
Wherein, the preset sequence specifically comprises: the order of the sequence is manually arranged by the user, or the order of the sequence is ordered.
Preferably, in the above technical solution, the obtaining of the fan state matrix β according to the fan state of each fan, that is, S11 includes:
s110, acquiring a second weight of each fan according to the state of each fan;
and S111, arranging the second weights corresponding to the fans according to a preset sequence to form a fan state matrix beta with dimension of m multiplied by 1.
Wherein, according to the fan state of any fan, obtain the second weight of this fan, the concrete process is as follows:
when any fan is in a good state, the second weight of the fan is set to be 1 by operation and maintenance personnel, when the fan fails to operate, the second weight of the fan is set to be 0 by the operation and maintenance personnel, and when the operation time of a certain fan needs to be reduced, the operation and maintenance personnel can select a value from 0 to 1 as the second weight of the fan according to specific conditions and practical experience.
Preferably, in the above technical solution, the obtaining a fan start matrix γ according to the fan start state in each heat exchanger, that is, S12 includes:
s120, acquiring a third weight of each fan according to the fan state of each fan, wherein the fan starting state is as follows: an on-going state or a stopped state;
and S121, arranging the third weights corresponding to the fans according to the preset sequence to form a fan starting matrix gamma with dimension of m multiplied by 1.
The specific process of acquiring the third weight of the fan according to the fan state of any fan is as follows:
when any fan is running, namely the fan is in a running state, setting the third weight of the fan to be 0; and when the fan is not operated, namely the fan is in a stop state, setting the third weight of the fan to be 1.
Preferably, in the above technical solution, the obtaining of the fan operation interval matrix δ according to the fan operation interval parameter of each fan, that is, S13 includes:
s130, obtaining a fourth weight delta corresponding to the ith fan by using a second formula i And until a fourth weight corresponding to each fan is obtained, and the fourth weights corresponding to each fan are arranged according to the preset sequence to form a fan operation interval matrix delta with dimension of mx 1, wherein the second formula is as follows:
wherein k is i And the number of interval fans of the ith fan which runs twice continuously is shown, wherein i is a positive integer, and m is a positive integer.
Preferably, in the above technical solution, in S14, the calculating a total weight matrix according to the environmental parameter matrix α, the fan state matrix β, the fan start matrix γ, and the fan operation interval matrix δ includes:
s140, calculating the total weight matrix P by using a third formula, wherein the third formula is as follows: p ═ α ═ β ═ γ · δ.
Preferably, in the above technical solution, in S010, obtaining, according to the operation data of each heat exchanger in the air cooling system, a theoretical heat exchange amount added to each heat exchanger after the fan of each heat exchanger is started includes:
s0100, calculating theoretical heat exchange quantity Q corresponding to any heat exchanger by using a fourth formula, wherein the fourth formula is as follows: q is a × G × ρ × c p ×(t-t in ) Wherein, in the step (A),
wherein, Δ P fan Is the flow-pressure drop curve of the fan, f 1 、f 2 、f 3 Coefficient obtained by fitting a performance curve provided by a fan manufacturer, G is air volume and delta P HE Is the flow pressure drop curve of the heat exchanger, C 1 、C 2 、C 3 Providing a coefficient obtained by fitting performance parameters by a heat exchanger manufacturer, wherein delta P is the difference between the outlet pressure and the inlet pressure of the heat exchanger obtained by a pressure monitoring device, A is the area of the heat exchanger, and t is in Is the inlet air temperature, t is the temperature of the medium in the heat exchanger tube, ρ is the air density, c p Is the constant pressure specific heat capacity of air.
As shown in fig. 2, the flow pressure drop curve of the fan and the flow pressure drop curve of the heat exchanger are both the pressure-related air volume relationship, the fan is used for providing power, and the heat exchanger is used for providing resistance; when the power is equal to the resistance, the actual air quantity passing through the heat exchanger is obtained; the intersection point of the two curves is the air volume G;
Δ P is an added resistance value due to environmental parameters, and the presence of Δ P causes the intersection point in the upper graph to move, resulting in a change in the air volume. Therefore, through the two curves and the extra resistance obtained by monitoring, the theoretical air volume which can be obtained after the fan is opened can be obtained through calculation, namely the air volume G of the application.
As shown in fig. 3, each heat exchanger includes an air cooling fan and a heat exchange tube bundle, a measurement point for measuring inlet pressure is arranged at an inlet of each heat exchanger, and is specifically measured by a pressure sensor, a temperature measurement point for measuring inlet temperature is arranged at an inlet of each heat exchanger, and is specifically measured by a temperature sensor, and a measurement point for measuring outlet pressure is arranged at an outlet of each heat exchanger, and is specifically measured by a pressure sensor.
The fan control method of an air cooling system according to the present application is explained by another embodiment as follows:
s20, when the air cooling system is operated for the first time, no fan is operated in the air cooling system at the moment, and no historical operation data exists, then:
(1) the outlet temperature of the air cooling system is higher than an initial set value, and a group of fans need to be added for operation.
(2) Numbering each fan in the air cooling system, for example, numbering six fans in turn to A, B, C, D, E, F, that is, numbering the 1 st fan as a, numbering the 2 nd fan as B, numbering the 3 rd fan as C, numbering the 4 th fan as D, numbering the 5 th fan as E, numbering the 6 th fan as F, and the total number m of all fans being 6, at this time, the preset sequence may be: the method comprises the following steps of sequentially arranging a fan with the number of A, a fan with the number of B, a fan with the number of C, a fan with the number of D, a fan with the number of E and a fan with the number of F from front to back;
s21, obtaining a sequencing sequence, specifically:
obtaining the working environment, i.e. the operation data, of each heat exchanger in the air cooling system through the temperature and pressure monitoring device of the air cooling system, and determining that the flow pressure drop curve of the fan is delta P fan ＝240.36+0.4964G-0.03679G 2 (ii) a The flow pressure drop curve of the heat exchanger is delta P HE ＝-20.122+2.1338G+0.1055G 2 (ii) a The heat exchange area A of each heat exchanger is 400m 2 (ii) a Air density rho is 1kg/m 3 (ii) a The air specific heat capacity is 1.056 kJ/(kg.K), the temperature t of a medium in the heat exchanger tube is 58 ℃, the difference delta P between the outlet pressure and the inlet pressure of the heat exchanger obtained by the air cooling unit monitoring device, the inlet air temperature tin and the calculated air volume G are obtained, and all theoretical heat exchange quantities are sequenced according to the theoretical heat exchange quantity increased by each heat exchanger after the fan of each heat exchanger of the fourth formula from large to small to obtain a sequencing sequence as shown in the following table 1.
Table 1:
as can be seen from table 1, the sequences n of the fans from a to F are 6, 4, 3, 1, 5, 2, specifically: the serial number of the 1 st fan, i.e., the fan with the number a, is 6, the serial number of the 2 nd fan, i.e., the fan with the number B, is 4, the serial number of the 3 rd fan, i.e., the fan with the number C, is 3, the serial number of the 4 th fan, i.e., the fan with the number D, is 1, the serial number of the 5 th fan, i.e., the fan with the number E, is 5, and the serial number of the 6 th fan, i.e., the fan with the number F, is 2.
S22, calculating an environment parameter matrix α, specifically:
obtaining a first weight alpha corresponding to the ith fan by using a first formula i Until the first weight corresponding to each fan is obtained, and the first weights corresponding to each fan are arranged according to a preset sequence to form an environment parameter matrix alpha with dimension of mx 1, where the first formula is as follows:
wherein n is i Indicating the serial number of the ith fan in the sorting sequence, and m indicates the total number of all fans. Then:
the first weights calculated from a to F are 0.4344, 0.6063, 0.7164, 1.0000, 0.5132, 0.8464, respectively, and the environment parameter matrix α is [ 0.43440.60630.71641.00000.51320.8464 ═] T 。
S23, acquiring a fan state matrix beta, specifically:
according to the state of each group of fans, an operation and maintenance worker sets the weight of each group of fans to obtain a fan state matrix beta, in this example, if the state of the 4 th fan, namely the fan with the number D, is not good and the number of operation times needs to be reduced, the second weight of the 4 th fan, namely the fan with the number D, is set to 0.4, the second weights of the rest fans are all 1, and the second weights corresponding to the fans are arranged according to a preset sequence to obtain a fan state matrix beta [ 1.00001.00001.00000.40001.00001.0000 ═ by arranging the second weights corresponding to the fans] T 。
S24, acquiring a fan starting matrix gamma, specifically:
in this example, all the fans are not running, the third weight of each fan is 1, and the fan start matrix γ is [ 1.00001.00001.00001.00001.00001.0000 ]] T ；
S25, acquiring a fan operation interval matrix delta, specifically:
since the air cooling system is operated for the first time in this example, there is no historical operating data. Then from a to F, each fan has the same fourth weight. Then the running interval matrix δ ═ 1.00001.00001.00001.00001.00001.0000 ] T;
s26, calculating a total weight matrix, specifically:
calculating the overall weight matrix P using a third formula, the third formula being: p ═ α ═ β ═ γ · δ. Then:
and S27, determining the fan corresponding to the maximum weight as a starting fan and controlling the operation, wherein if 0.8464 is the maximum weight according to the calculated total weight matrix P, determining the fan corresponding to 0.716 as the starting fan and controlling the operation, namely determining the 6 th fan with the number F as the starting fan.
In another embodiment, in particular:
s30, the air cooling system is not operated for the first time, the fan C, B is operated at the moment, historical operation data exist, the historical starting sequence of the fan is A, D, F, E, C, B, and then:
(1) the outlet temperature of the air cooling system is higher than an initial set value, and a group of fans are required to be added for operation.
(2) Each group of fans in the air cooling system is numbered. The six groups of fans are numbered A, B, C, D, E, F in sequence; for example, the six fans are numbered sequentially to be A, B, C, D, E, F, that is, the number of the 1 st fan is a, the number of the 2 nd fan is B, the number of the 3 rd fan is C, the number of the 4 th fan is D, the number of the 5 th fan is E, the number of the 6 th fan is F, and the total number m of all the fans is 6, and the preset sequence may be: the method comprises the following steps of sequentially arranging a fan with the number of A, a fan with the number of B, a fan with the number of C, a fan with the number of D, a fan with the number of E and a fan with the number of F from front to back;
s31, obtaining a sequencing sequence, specifically:
obtaining the working environment, i.e. the operation data, of each heat exchanger in the air cooling system through the temperature and pressure monitoring device of the air cooling system, and determining that the flow pressure drop curve of the fan is delta P fan ＝240.36+0.4964G-0.03679G 2 (ii) a The flow pressure drop curve of the heat exchanger is delta P HE ＝-20.122+2.1338G+0.1055G 2 (ii) a The heat exchange area A of each heat exchanger is 400m 2 (ii) a Air density rho is 1kg/m 3 (ii) a The air specific heat capacity is 1.056 kJ/(kg.K), the temperature t of a medium in the heat exchanger tube is 58 ℃, the difference delta P between the outlet pressure and the inlet pressure of the heat exchanger obtained by the air cooling unit monitoring device, the inlet air temperature tin and the calculated air volume G are obtained, and all theoretical heat exchange quantities are sequenced according to the theoretical heat exchange quantity increased by each heat exchanger after the fan of each heat exchanger of the fourth formula from large to small to obtain a sequencing sequence as shown in the following table 2.
Table 2:
as can be seen from table 2, the sequences n of the fans from a to F are 6, 4, 3, 1, 5, 2, specifically: the serial number of the blower with the 1 st serial number a is 6, the serial number of the blower with the 2 nd serial number B is 4, the serial number of the blower with the 3 rd serial number C is 3, the serial number of the blower with the 4 th serial number D is 1, the serial number of the blower with the 5 th serial number E is 5, and the serial number of the blower with the 6 th serial number F is 2.
S32, calculating an environment parameter matrix α, specifically:
obtaining a first weight alpha corresponding to the ith fan by using a first formula i Until obtaining the first weight corresponding to each fan, and pairing according to the preset sequenceArranging the first weights corresponding to each fan to form an environment parameter matrix alpha with dimension m multiplied by 1, wherein the first formula is as follows:
wherein n is i Indicating the serial number of the ith fan in the sorting sequence, and m indicates the total number of all fans. Then:
the first weights calculated from a to F are 0.4344, 0.6063, 0.7164, 1.0000, 0.5132 and 0.8464 respectively, and then the environment parameter matrix α is [ 0.43440.60630.71641.00000.51320.8464 ]] T 。
S23, acquiring a fan state matrix beta, specifically:
according to the state of each group of fans, the operation and maintenance personnel sets the weight of each group of fans to obtain a fan state matrix beta, in the embodiment, if the state of the 4 th fan with the serial number D is not good and the operation times need to be reduced, the second weight of the 4 th fan with the serial number D is set to be 0.4, the second weights of the rest fans are all 1, and the fan state matrix beta is [ 1.00001.00001.00000.40001.00001.0000 ]] T 。
S24, acquiring a fan starting matrix gamma, specifically:
in this example, fans of the 2 nd fan, i.e., the number B, and the 3 rd fan, i.e., the number C, are running, and the third weights of the two fans are both 0; if the rest fans are not operated, the third weight of each fan is 1, and the fan starting matrix gamma is [ 1.0000001.00001.00001.0000 ]] T ；
S25, acquiring a fan operation interval matrix delta, specifically:
according to the historical starting sequence of the fans, the number k of the interval fans which are operated from A to F respectively and are operated at the latest time is 5, 0, 1, 4, 2 and 3. Calculating a fourth weight corresponding to each fan according to a second formula, wherein the fourth weight of each fan is respectively from A to F: 0.8809, 0.0473, 0.1191, 0.7312, 0.2688 and 0.5000, the running interval matrix δ is [ 0.88090.04730.11910.73120.26880.5000 ]] T ；
S25, calculating a total weight matrix, specifically:
calculating the overall weight matrix P using a third formula, the third formula being: p ═ α ×. β ×. γ ×, δ, then:
and S26, determining the fan corresponding to the maximum weight as a starting fan and controlling the operation, wherein if 0.4232 is the maximum weight according to the calculated total weight matrix P, determining the fan corresponding to 0.4232 as the starting fan and controlling the operation, namely determining the 6 th fan with the number of F as the starting fan.
In the above embodiments, although the steps are numbered as S1, S2, etc., but only the specific embodiments are given in this application, and those skilled in the art may adjust the execution sequence of S1, S2, etc. according to the actual situation, which is also within the protection scope of the present invention, it is understood that some embodiments may include some or all of the above embodiments.
As shown in fig. 4, a fan control system 200 of an air cooling system according to an embodiment of the present invention includes a calculating module 210 and a start determining module 220;
the calculation module 210 is configured to: calculating the weight corresponding to each fan according to the environmental parameters, the fan state, the fan starting state and the fan operation interval parameters of the fan in each heat exchanger in the air cooling system;
the start determining module 220 is configured to determine the fan corresponding to the maximum weight as a start fan and control start.
By comprehensively considering factors such as the ambient environment and the performance states among different fans when the air cooling system operates and automatically selecting the optimal fan, namely the fan corresponding to the maximum weight to operate, the air cooling system can achieve the purposes of maximum heat exchange amount and automatic regulation and control under different environments, and the operation and maintenance process of the air cooling system can be further simplified.
Preferably, in the above technical solution, the calculating module 210 is specifically configured to:
obtaining an environment parameter matrix alpha according to the environment parameters of each fan;
obtaining a fan state matrix beta according to the fan state of each fan;
obtaining a fan starting matrix gamma according to the fan starting state of each fan;
obtaining a fan operation interval matrix delta according to the fan operation interval parameters of each fan;
and calculating a total weight matrix according to the environment parameter matrix alpha, the fan state matrix beta, the fan starting matrix gamma and the fan operation interval matrix delta, and acquiring the weight corresponding to each fan from the total weight matrix.
Preferably, in the above technical solution, the method further includes a calculation sorting module, where the calculation sorting module is configured to:
obtaining theoretical heat exchange quantity increased by each heat exchanger after a fan of each heat exchanger is started according to operation data of each heat exchanger in the air cooling system, and sequencing all the theoretical heat exchange quantities according to a sequence from large to small to obtain a sequencing sequence;
the calculation module 210 includes a first calculation module configured to: obtaining a first weight alpha corresponding to the ith fan by using a first formula i And until the first weight corresponding to each fan is obtained, and the first weights corresponding to each fan are arranged according to the sequence of the sequencing sequence to form an environment parameter matrix alpha with dimension of m × 1, wherein the first formula is as follows:
wherein n is i Indicating the serial number of the ith fan in the sorting sequence, and m indicates the total number of all fans.
Preferably, in the above technical solution, the calculating module 210 includes a second calculating module, and the second calculating module is configured to:
acquiring a second weight of each fan according to the fan state of each fan;
and arranging the second weights corresponding to each fan according to the sequence of the sequencing sequence to form a fan state matrix beta with dimension of m multiplied by 1.
Preferably, in the above technical solution, the calculating module 210 includes a third calculating module, and the third calculating module is configured to:
acquiring a third weight of each fan according to the fan state of each fan, wherein the fan starting state is as follows: an on-going state or a stopped state;
and arranging the third weights corresponding to each fan according to the sequence of the sequencing sequence to form a fan starting matrix gamma with dimension of m multiplied by 1.
Preferably, in the above technical solution, the calculating module 210 includes a fourth calculating module, and the fourth calculating module is configured to: obtaining a fourth weight delta corresponding to the ith fan by using a second formula i Until the fourth weight corresponding to each fan is obtained, and the fourth weights corresponding to each fan are arranged according to the sequence of the sorting sequence to form a fan operation interval matrix delta with dimension of mx 1, wherein the second formula is as follows:
wherein k is i And the number of interval fans of the ith fan which runs twice continuously is shown.
Preferably, in the above technical solution, the calculating module 210 includes a fifth calculating module, and the fifth calculating module is configured to:
calculating the overall weight matrix P using a third formula, the third formula being: p ═ α ═ β ═ γ · δ.
Preferably, in the above technical solution, the calculation sorting module is specifically configured to:
calculating theoretical heat exchange quantity Q corresponding to any heat exchanger by using a fourth formula, wherein the fourth formula is as follows: q is axg × ρ × c p ×(t-t in ) Wherein, in the step (A),
wherein，ΔP fan Is the flow-pressure drop curve of the fan, f 1 、f 2 、f 3 Coefficient obtained by fitting a performance curve provided by a fan manufacturer, G is air volume and delta P HE Is the flow pressure drop curve of the heat exchanger, C 1 、C 2 、C 3 Providing a coefficient obtained by fitting performance parameters by a heat exchanger manufacturer, wherein delta P is the difference between the outlet pressure and the inlet pressure of the heat exchanger obtained by a pressure monitoring device, A is the area of the heat exchanger, and t is in Is the inlet air temperature, t is the temperature of the medium in the heat exchanger tube, ρ is the air density, c p Is the constant pressure specific heat capacity of air.
The above steps for realizing the corresponding functions of the parameters and the unit modules in the fan control system 200 of the air cooling system according to the present invention refer to the above parameters and steps in the embodiment of the fan control method of the air cooling system, which are not described herein again.
In another embodiment, the system comprises an air cooling system monitoring device, a processor and a controller, wherein the air cooling system monitoring device comprises a temperature sensor and a pressure sensor, each heat exchanger comprises an air cooling fan and a heat exchange tube bundle, a measuring point for measuring inlet pressure is arranged at an inlet of each heat exchanger, the inlet pressure is particularly measured through the pressure sensor, a temperature measurer for measuring inlet temperature is arranged at the inlet of each heat exchanger, the inlet temperature is particularly measured through the temperature sensor, a measuring point for measuring outlet pressure is arranged at an outlet of each heat exchanger, the outlet pressure is particularly measured through the pressure sensor, the operation data are sent to the processor, the processor calculates the weight corresponding to each fan by using the fan control method of the air cooling system, and determines the fan corresponding to the maximum weight as a starting fan, the controller controls the starting of the fan.
The electronic device of the embodiment of the invention comprises a memory, a processor and a program which is stored on the memory and runs on the processor, wherein when the processor executes the program, the steps of the fan control method of the air cooling system implemented in any one of the above are realized.
The electronic device may be a computer, a mobile phone, or the like, and the program thereof is computer software or a mobile phone APP, and the parameters and the steps in the electronic device of the present invention may refer to the parameters and the steps in the above embodiment of the fan control method for an air cooling system, which are not described herein again.
As will be appreciated by one skilled in the art, the present invention may be embodied as a system, method or computer program product.
Accordingly, the present disclosure may be embodied in the form of: the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-code, etc.) or an embodiment combining software and hardware aspects that may all generally be referred to herein as a "circuit," module "or" system. Furthermore, in some embodiments, the invention may also be embodied in the form of a computer program product in one or more computer-readable media having computer-readable program code embodied in the medium.
Any combination of one or more computer-readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A fan control method of an air cooling system is characterized by comprising the following steps:
calculating the weight corresponding to each fan according to the environmental parameters, the fan state, the fan starting state and the fan operation interval parameters of the fan in each heat exchanger in the air cooling system;
and determining the fan corresponding to the maximum weight as a starting fan and controlling the starting.
2. The fan control method of an air cooling system according to claim 1, wherein the calculating the weight corresponding to each fan according to the environmental parameter, the fan state, the fan start-up state and the fan operation interval parameter of the fan in each heat exchanger includes:
obtaining an environment parameter matrix alpha according to the environment parameters of each fan;
obtaining a fan state matrix beta according to the fan state of each fan;
obtaining a fan starting matrix gamma according to the fan starting state of each fan;
obtaining a fan operation interval matrix delta according to the fan operation interval parameters of each fan;
and calculating a total weight matrix according to the environment parameter matrix alpha, the fan state matrix beta, the fan starting matrix gamma and the fan operation interval matrix delta, and acquiring the weight corresponding to each fan from the total weight matrix.
3. The fan control method of an air cooling system according to claim 2, wherein before obtaining the environment parameter matrix α according to the environment parameter of each fan, the method further comprises:
obtaining theoretical heat exchange quantity increased by each heat exchanger after a fan of each heat exchanger is started according to operation data of each heat exchanger in the air cooling system, and sequencing all the theoretical heat exchange quantities according to a sequence from large to small to obtain a sequencing sequence;
obtaining an environmental parameter matrix according to the environmental parameters of the fan in each heat exchanger, including:
obtaining a first weight alpha corresponding to the ith fan by using a first formula i Until the first weight corresponding to each fan is obtained, and the first weights corresponding to each fan are arranged according to a preset sequence to form an environment parameter matrix alpha with dimension of mx 1, where the first formula is as follows:
wherein n is i Indicating the serial number of the ith fan in the sorting sequence, and m indicates the total number of all fans.
4. The fan control method of an air cooling system according to claim 3, wherein the obtaining a fan state matrix β according to the fan state of each fan includes:
acquiring a second weight of each fan according to the fan state of each fan;
and arranging the second weights corresponding to each fan according to the preset sequence to form a fan state matrix beta with dimension of m multiplied by 1.
5. The method for controlling the fans of the air-cooling system according to claim 3, wherein the obtaining of the fan start matrix γ according to the fan start state in each heat exchanger includes:
acquiring a third weight of each fan according to the fan state of each fan, wherein the fan starting state is as follows: an on-going state or a stopped state;
and arranging the third weights corresponding to each fan according to the preset sequence to form a fan starting matrix gamma with dimension of m multiplied by 1.
6. The method for controlling fans of an air-cooling system according to claim 3, wherein obtaining the fan operation interval matrix δ according to the fan operation interval parameter of each fan includes:
obtaining a fourth weight delta corresponding to the ith fan by using a second formula i And until a fourth weight corresponding to each fan is obtained, arranging the fourth weights corresponding to each fan according to the preset sequence to form a fan operation interval matrix delta with dimension of mx 1, wherein the second formula is as follows:
wherein k is i And the number of interval fans of the ith fan which runs twice continuously is shown.
7. The method for controlling the fans of the air cooling system according to any one of claims 2 to 6, wherein the calculating the total weight matrix according to the environmental parameter matrix α, the fan state matrix β, the fan start matrix γ and the fan operation interval matrix δ includes:
calculating the overall weight matrix P using a third formula, the third formula being: p ═ α ═ β ═ γ · δ.
8. The method as claimed in any one of claims 2 to 7, wherein the step of obtaining the theoretical heat exchange amount added to each heat exchanger after the fan of each heat exchanger is started according to the operation data of each heat exchanger in the air cooling system includes:
calculating theoretical heat exchange quantity Q corresponding to any heat exchanger by using a fourth formula, wherein the fourth formula is as follows: q is a × G × ρ × c p ×(t-t in ) Wherein, in the step (A),
wherein, Δ P fan Is the flow-pressure drop curve of the fan, f 1 、f 2 、f 3 Coefficient obtained by fitting a performance curve provided by a fan manufacturer, G is air volume and delta P HE Flow pressure drop curve for heat exchanger，C 1 、C 2 、C 3 Providing a coefficient obtained by fitting performance parameters by a heat exchanger manufacturer, wherein delta P is the difference between the outlet pressure and the inlet pressure of the heat exchanger obtained by a pressure monitoring device, A is the area of the heat exchanger, and t is in Is the inlet air temperature, t is the temperature of the medium in the heat exchanger tube, ρ is the air density, c P Is the constant pressure specific heat capacity of air.
9. A fan control system of an air cooling system is characterized by comprising a calculation module and a start determining module;
the calculation module is configured to: calculating the weight corresponding to each fan according to the environmental parameters, the fan state, the fan starting state and the fan operation interval parameters of the fan in each heat exchanger in the air cooling system;
and the starting determining module is used for determining the fan corresponding to the maximum weight as a starting fan and controlling the operation.
10. An electronic device comprising a memory, a processor and a program stored in the memory and running on the processor, wherein the processor executes the program to implement the steps of the fan control method for an air cooling system according to any one of claims 1 to 8.
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| EP0004448A1 (en) * | 1978-03-23 | 1979-10-03 | Armstrong Engineering Limited | Method and apparatus for control of a cooling system |
| CN107328026A (en) * | 2017-07-31 | 2017-11-07 | 珠海格力电器股份有限公司 | Fan control method and device and air conditioner outdoor unit |
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