CN103743068A - Method and system for controlling central air-conditioner cooling tower fan on basis of energy efficiency optimization - Google Patents
Method and system for controlling central air-conditioner cooling tower fan on basis of energy efficiency optimization Download PDFInfo
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- CN103743068A CN103743068A CN201410033631.3A CN201410033631A CN103743068A CN 103743068 A CN103743068 A CN 103743068A CN 201410033631 A CN201410033631 A CN 201410033631A CN 103743068 A CN103743068 A CN 103743068A
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Abstract
The invention discloses a method and a system for controlling a central air-conditioner cooling tower fan on the basis of energy efficiency optimization. The method includes the steps of calculating a first energy efficiency value of a heat source side of a central air-conditioner currently and controlling to start or stop one cooling tower fan extra after meeting triggering conditions, calculating a second energy efficiency value of the heat source side of the central air-conditioner currently after a preset start delay time or preset stop delay time since one cooling tower fan is started or stopped extra, comparing the first energy efficiency value with the second energy efficiency value, correspondingly stopping or starting one cooling tower fan extra if the second energy efficiency value is lower than the first energy efficiency value, and otherwise, updating the second energy efficiency into the first energy efficiency value. By the method and the system, during running of a central air-conditioning system, control in start or stop of the cooling tower fan extra can be optimized automatically according to change of the energy efficiency values, the running efficiency of the central air-conditioning system keeps at a high level, and thus energy is saved, implementing effect is improved, and influences caused by the external factors are avoided.
Description
Technical field
The present invention relates to central air-conditioning regulation technology, be specifically related to a kind of air-condition cooling tower blower control method and system of optimizing based on efficiency.
Background technology
Building central air conditioner system includes the equipment such as refrigerator, refrigerating water pump, coolant pump and cooling tower, the low-temperature receiver (chilled water) that refrigerator produces is delivered to air conditioning terminal by refrigerating water pump and fan coil carries out heat exchange, and the thermal source (cooling water) of the corresponding generation of while refrigerator is delivered to cooling tower by coolant pump and outside atmosphere is carried out heat exchange.
The heat exchange effect of thermal source and the refrigerating efficiency of refrigerator are closely related, conventionally 1 ℃ of the every reduction of cooling water return main temperature after heat exchange, refrigerator efficiency improves approximately 3%, on the contrary 1 ℃ of the every rising of cooling water return main temperature after heat exchange, refrigerator Efficiency Decreasing approximately 3%.Central air conditioner system is generally equipped with many cooling towers, every cooling tower has one or more blower fan, opens blower fan of cooling tower number of units more and contributes to heat radiation, reduces cooling water return water temperature, thereby improve the refrigerating efficiency of refrigerator, but correspondingly increased the operation energy consumption of blower fan of cooling tower.
In the central air conditioner system without automatically controlling, the unlatching number of units of blower fan of cooling tower is controlled according to the operating experience of oneself by administrative staff conventionally.This mode is according to cold board number and be fixed the control of blower fan of cooling tower number of units season, depends on administrative staff's level and operation simultaneously, and implementation result is poor.
In the central air conditioner system that has automatic control, the unlatching number of units of blower fan of cooling tower is controlled according to cooling water return main temperature and setting ladder target temperature conventionally, its control method is: (1) loads blower fan of cooling tower: when cooling water return main temperature is during higher than target setting temperature and certain time, load a blower fan of cooling tower; Every the several years (as 2 ℃), a target temperature is set, by platform, opens blower fan of cooling tower.(2) off-load blower fan of cooling tower: when cooling water return main temperature deducts a dead band temperature and certain time lower than target setting temperature, blower fan of cooling tower of off-load; (3) load or blower fan of cooling tower of off-load after time delay certain hour load again and the judgement of off-load blower fan of cooling tower next time.The method is simple control mode, is not take running efficiency of system as target, and the efficiency that cannot optimize the system operation makes running efficiency of system low sometimes on the contrary.
Summary of the invention
The technical problem to be solved in the present invention is, for the defect of prior art, provides a kind of air-condition cooling tower blower control method and system of optimizing based on efficiency.
The technical solution adopted for the present invention to solve the technical problems is: a kind of air-condition cooling tower blower control method of optimizing based on efficiency, comprises the following steps:
S1: after trigger condition occurs, calculate the first efficiency value of current central air-conditioning heat source side, and control and increase or stop a blower fan of cooling tower;
S2: increasing or stopping default the adding after machine delay time or default shutdown delay time after a blower fan of cooling tower, calculate the second efficiency value of current central air-conditioning heat source side;
S3: the relatively size of the first efficiency value and the second efficiency value, if relative the first efficiency value of the second efficiency value reduces, correspondingly stops or increasing a blower fan of cooling tower, otherwise the second efficiency value is updated to the first efficiency value, repeating step S2.
Preferably, described step S1 comprises the following steps:
S10: every a default optimization delay time, gather the first chilled water of current central air-conditioning for the first outdoor temperature value of return main's cold, the first refrigerator instantaneous electric power, the first coolant pump instantaneous electric power, the first cooling tower instantaneous electric power and cooling tower storage;
S11: the first efficiency value the storage of calculating current central air-conditioning heat source side;
S12: judge whether the first efficiency value, the first chilled water exceed default percentage or no process default optimization time interval timing time with respect to central air conditioner system acquiescence or last the 3rd efficiency value, the 3rd chilled water stored in delay time optimized for the variation of return main's cold and the 3rd temperature value for return main's cold and the first temperature value, and control is increased or stopped blower fan of cooling tower according to judged result; Wherein, described judged result is the trigger condition in step S1;
S13: the first efficiency value, the first chilled water are stored as to the 3rd efficiency value, the 3rd chilled water for return main's cold and the 3rd temperature value, repeating step S10 for return main's cold and the renewal of the first temperature value.
Preferably, described step S12 comprises:
S120: if the first efficiency value exceedes default percentage than the variation increase of the 3rd efficiency value, control and increase blower fan of cooling tower; If the first efficiency value reduces and exceedes default percentage than the variation of the 3rd efficiency value, control and stop blower fan of cooling tower; Otherwise execution step S123; Or
S121: if the first chilled water exceedes default percentage than the 3rd chilled water for the variation increase of return main's cold for return main's cold, control and increase blower fan of cooling tower; If the first chilled water reduces and exceedes default percentage for the variation of return main's cold than the 3rd chilled water for return main's cold, control and stop blower fan of cooling tower; Otherwise execution step S123; Or
S122: if the first temperature value exceedes default percentage than the variation increase of the 3rd temperature value, control and increase blower fan of cooling tower; If the first temperature value reduces and exceedes default percentage than the variation of the 3rd temperature value, control and stop blower fan of cooling tower; Otherwise execution step S123;
S123: after a default optimization time interval timing time arrives, control and increase or stop blower fan of cooling tower; Otherwise repeating step S120～S122.
Preferably, described step S1 also comprises:
S14: Real-time Collection cooling water house steward temperature value, cooling water return main temperature value;
S15: if cooling water house steward temperature value, higher than cooling water supply temperature protection value, is increased a blower fan of cooling tower; If cooling water return main temperature value during lower than cooling water return water temperature protection value, stops a blower fan of cooling tower; Otherwise repeating step S14.
Preferably, described step S2 comprises:
S20: add machine delay time or stopping after the default shutdown delay time after a blower fan of cooling tower increasing default after a blower fan of cooling tower, gathering the second chilled water of current central air-conditioning for return main's cold, the second refrigerator instantaneous electric power, the second coolant pump instantaneous electric power, the second cooling tower instantaneous electric power storage;
S21: utilize described the second chilled water to calculate described the second efficiency value for return main's cold, the second refrigerator instantaneous electric power, the second coolant pump instantaneous electric power and the second cooling tower instantaneous electric power.
Preferably, described the first efficiency value and the second efficiency value adopt following formula to calculate:
The first efficiency value=the first chilled water is for return main's cold/(the first refrigerator instantaneous electric power+the first coolant pump instantaneous electric power+the first cooling tower instantaneous electric power);
The second efficiency value=the second chilled water is for return main's cold/(the second refrigerator instantaneous electric power+the second coolant pump instantaneous electric power+the second cooling tower instantaneous electric power).
Preferably, the blower fan of cooling tower of at every turn increasing is the shortest blower fan of cooling tower of accumulated running time; Stop blower fan of cooling tower is the longest blower fan of cooling tower of accumulated running time at every turn.
The present invention also provides a kind of air-condition cooling tower blower fan control system of optimizing based on efficiency, the control chip that comprises the data acquisition unit of the data message for gathering central air-conditioning environment, is connected with at least one blower fan of cooling tower with described data acquisition unit; Described data acquisition unit comprises the first instantaneous electric power meter of being arranged on refrigerator, be arranged on the second instantaneous electric power meter on coolant pump, be arranged on the 3rd instantaneous electric power meter on cooling tower, be arranged on cooling water house steward the first thermometer, be arranged on cooling water return main the second thermometer, be arranged on the 3rd outdoor thermometer of cooling tower and be arranged on cold meter or four thermometer and the flowmeter of chilled water for return main.
Preferably, described control chip comprise for processing data information being become to the data processing unit of control information, be connected with described data processing unit for the timing unit of timing and the memory cell for storing data information being connected with described data processing unit.
The present invention compared with prior art tool has the following advantages: implement the present invention, according to the efficiency value in central air conditioner system running, change increasing or stopping of Automatic Optimal control blower fan of cooling tower, make the operational energy efficiency of central air conditioner system in higher level, thereby reach energy-conservation object; Its enforcement does not rely on administrative staff's operation, and implementation result is good; And be not subject to the impact of outdoor temperature variation and system requirements cold load uncertain factor, guarantee the efficiency of system optimized operation.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the logic diagram that the present invention is based on air-condition cooling tower blower fan control system one embodiment of efficiency optimization.
Fig. 2 is the theory diagram that the present invention is based on air-condition cooling tower blower fan control system one embodiment of efficiency optimization.
Fig. 3 is the flow chart that the present invention is based on the air-condition cooling tower blower control method embodiment 1 of efficiency optimization.
Fig. 4 is that the present invention is based on can be by the flow chart of air-condition cooling tower blower control method embodiment 2 of optimizing.
Fig. 5 is that the present invention is based on can be by the flow chart of air-condition cooling tower blower control method embodiment 3 of optimizing.
In figure: 10, data acquisition unit; 11, the first instantaneous electric power meter; 12, the second instantaneous electric power meter; 13, the 3rd instantaneous electric power meter; 14, the first thermometer; 15, the second thermometer; 16, the 3rd thermometer; 17, cold meter; 20, control chip; 21, data processing unit; 22, timing unit; 23, memory cell; 30, refrigerator; 31, coolant pump; 32, cooling water house steward; 33, cooling water return main; 34, refrigerating water pump; 35, chilled water water main; 36, chilled water return main; 40, cooling tower; 50, blower fan of cooling tower; 60, fan coil.
The specific embodiment
For technical characterictic of the present invention, object and effect being had more clearly, understand, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
Fig. 1 illustrates the logic diagram of air-condition cooling tower blower fan control system one embodiment that the present invention is based on efficiency optimization.As shown in Figure 1, central air conditioner system comprises the equipment such as refrigerator 30, cooling tower 40, fan coil 60, coolant pump 31, refrigerating water pump 34, wherein cooling tower 40 is provided with at least one blower fan of cooling tower 50, between refrigerator 30 and cooling tower 40, by cooling water house steward 32, be connected with cooling water return main 33, coolant pump 31 is arranged on cooling water house steward 32 and cooling water return main 33; Refrigerator 30 is connected with chilled water return main 36 by chilled water water main 35 with fan coil 60, and refrigerating water pump 34 is arranged on chilled water water main 35 and chilled water return main 36.As shown in Figure 2, air-condition cooling tower blower fan control system based on efficiency optimization provided by the present invention also comprises the data acquisition unit 10 of the data message for gathering central air-conditioning environment and the control chip 20 being connected with at least one blower fan of cooling tower 50 with data acquisition unit 10 respectively, and control chip 20 becomes to control in order to the processing data information that data acquisition unit 10 is gathered the control information that blower fan of cooling tower 50 is opened or stopped.
As Fig. 1, shown in Fig. 2, data acquisition unit 10 comprise be arranged on refrigerator 30 for gathering the first instantaneous electric power meter 11 of refrigerator 30 instantaneous electric powers, be arranged on coolant pump 31 for gathering the second instantaneous electric power meter 12 of coolant pump instantaneous electric power, be arranged on cooling tower 40 for gathering the 3rd instantaneous electric power meter 13 of cooling tower instantaneous electric power, be arranged on the first thermometer 14 for Real-time Collection cooling water house steward 32 temperature of cooling water house steward 32, be arranged on the second thermometer 15 for Real-time Collection cooling water return main 33 temperature of cooling water return main 33, be arranged on cooling tower 40 outdoor for gather the 3rd thermometer 16 of cooling tower 40 outdoor temperatures and be arranged on chilled water return main 36 or chilled water water main 35 on for calculating the cold meter 17 of cold.Understandably, be arranged on can adopt and be arranged on that chilled water adds temperature sensor on supply mains or chilled water water main 35 and flowmeter substitutes for calculating the cold meter 17 of cold on chilled water return main 36 or chilled water water main 35, and use integrating instrument to calculate its cold.
As shown in Figure 2, control chip 20 comprises for the data processing unit 21 with the control information that is formed for controlling blower fan of cooling tower 50 and opens or stop by processing data information, also comprise be connected with data processing unit 21 for the timing unit 22 of timing and the memory cell 23 for storing data information being connected with data processing unit 21.
Embodiment 1
Fig. 3 illustrates the flow chart of the air-condition cooling tower blower control method of optimizing based on efficiency in the embodiment of the present invention 1.The air-condition cooling tower blower control method that should optimize based on efficiency, comprises the following steps:
S1: after trigger condition occurs, calculate the first efficiency value of current central air-conditioning heat source side, and control and increase a blower fan of cooling tower 50.Concrete, step S1 comprises the following steps:
S10: be controlled at after a default optimization delay time (as 30min) by the timing unit 22 on control chip 20, the first chilled water that gathers current central air-conditioning for calculating the cold meter 17 of cold that utilization is arranged on chilled water return main 36 or chilled water water main 35 supplies return main's cold, the first instantaneous electric power meter 11 that utilization is arranged on refrigerator 30 gathers the first refrigerator instantaneous electric power, the second instantaneous electric power meter 12 that utilization is arranged on coolant pump 31 gathers the first coolant pump instantaneous electric power, the 3rd instantaneous electric power meter 13 that utilization is arranged on cooling tower 40 gathers the first cooling tower instantaneous electric power and utilizes the 3rd outdoor thermometer 16 of cooling tower 40 to gather the first temperature value storage.Understandably, the first chilled water comprises and utilizes the first chilled water return main cold or the utilization that for calculating the cold meter 17 of cold, gather current central air-conditioning that are arranged on chilled water return main 36 to be arranged on the first chilled water water main cold that gathers current central air-conditioning for calculating the cold meter 17 of cold on chilled water water main 35 for return main's cold.
S11: by the computing formula of the first efficiency value: the first efficiency value=the first chilled water is for return main's cold/(the first refrigerator instantaneous electric power+the first coolant pump instantaneous electric power+the first cooling tower instantaneous electric power), calculate the first efficiency value the storage of current central air-conditioning heat source side, the data-signal that the calculating of this first efficiency value only gathers current central air-conditioning heat source side environment calculates, and more accurately realizes according to the operational energy efficiency control blower fan of cooling tower 50 of heat source side blower fan of cooling tower 50 and dynamically controlling.
S12: whether the first efficiency value, the first chilled water that judgement calculates exceed default percentage or no process default optimization time interval timing time with respect to central air conditioner system acquiescence or last the 3rd efficiency value, the 3rd chilled water stored in delay time optimized for the variation of return main's cold and the 3rd temperature value for return main's cold and the first temperature value, trigger condition using judged result in step S1, according to judged result, control is increased and is stopped a blower fan of cooling tower 50.In the specific implementation, can be arranged on 5～15% by presetting percentage, default percentage is less, and its control is more accurate.The value of optimizing time interval timing time can be 0～60min.
Particularly, step S12 comprises:
S120: if the first efficiency value exceedes default percentage than the variation increase of the 3rd efficiency value, if default percentage is 10%, if the first efficiency value be the 3rd efficiency value 110% or more than, control and increase blower fan of cooling tower 50; Otherwise execution step S123.Or
S121: if the first chilled water exceedes default percentage than the 3rd chilled water for the variation increase of return main's cold for return main's cold, if default percentage is 10%, if the first chilled water for return main cold be the 3rd chilled water for return main's cold 110% or more than, control and increase blower fan of cooling tower 50; Otherwise execution step S123.Or
S122: if the first temperature value exceedes default percentage than the variation increase of the 3rd temperature value, if default percentage is 10%, if the first temperature value be the 3rd temperature value 110% or more than, control and increase blower fan of cooling tower 50; Otherwise execution step S123.
S123: be 30min if default optimization time interval timing time is set, from default optimization delay time within 30min, the condition of step S121, S122 or S123 thrin occurs, directly control and increase a blower fan of cooling tower 50, without according to step S123, otherwise after 30min, control and increase a blower fan of cooling tower 50 after default optimization delay time.
S13: increase after a blower fan of cooling tower 50 in control, the first efficiency value, the first chilled water are stored as to the 3rd efficiency value, the 3rd chilled water for return main's cold and the 3rd temperature value, using the basis as optimize calculating next time for return main's cold and the renewal of the first temperature value.
S2: in default the adding after machine delay time of increasing after a blower fan of cooling tower 50, calculate the second efficiency value of current central air-conditioning heat source side.Particularly, step S2 comprises:
S20: in default the adding after machine delay time (as 15min) of increasing after a blower fan of cooling tower 50, the second chilled water that gathers current central air-conditioning for calculating the cold meter 17 of cold that utilization is arranged on chilled water return main 36 or chilled water water main 35 supplies return main's cold, the first instantaneous electric power meter 11 that utilization is arranged on refrigerator 30 gathers the second refrigerator instantaneous electric power, the second instantaneous electric power meter 12 that utilization is arranged on coolant pump 31 gathers the second coolant pump instantaneous electric power, the 3rd instantaneous electric power meter 13 that utilization is arranged on cooling tower 40 gathers the second cooling tower instantaneous electric power storage.
S21: utilize described the second chilled water to pass through the computing formula of the second efficiency value for return main's cold, the second refrigerator instantaneous electric power, the second coolant pump instantaneous electric power and the second cooling tower instantaneous electric power: the second efficiency value=the second chilled water, for return main's cold/(the second refrigerator instantaneous electric power+the second coolant pump instantaneous electric power+the second cooling tower instantaneous electric power), calculates the second efficiency value.
S3: the relatively size of the first efficiency value and the second efficiency value, if relative the first efficiency value of the second efficiency value reduces, correspondingly stops a blower fan of cooling tower 50, otherwise the second efficiency value is updated to the first efficiency value, repeating step S2, S3.In the situation that stopping a blower fan of cooling tower 50, repeating step S2, S3, again relatively obtain relative the first efficiency value of the second efficiency value and reduce, and a blower fan of cooling tower 50 is increased in corresponding control.When repeating step S2, S3 occur to next trigger condition.
Embodiment 2
Fig. 4 illustrates the flow chart of the air-condition cooling tower blower control method of optimizing based on efficiency in the embodiment of the present invention 1.The air-condition cooling tower blower control method that should optimize based on efficiency, comprises the following steps:
S1: after trigger condition occurs, calculate the first efficiency value of current central air-conditioning heat source side, and control stops a blower fan of cooling tower 50.Concrete, step S1 comprises the following steps:
S10: be controlled at after a default optimization delay time (as 30min) by the timing unit 22 on control chip 20, the first chilled water that gathers current central air-conditioning for calculating the cold meter 17 of cold that utilization is arranged on chilled water return main 36 or chilled water water main 35 supplies return main's cold, the first instantaneous electric power meter 11 that utilization is arranged on refrigerator 30 gathers the first refrigerator instantaneous electric power, the second instantaneous electric power meter 12 that utilization is arranged on coolant pump 31 gathers the first coolant pump instantaneous electric power, the 3rd instantaneous electric power meter 13 that utilization is arranged on cooling tower 40 gathers the first cooling tower instantaneous electric power and utilizes the 3rd outdoor thermometer 16 of cooling tower 40 to gather the first temperature value storage.Understandably, the first chilled water comprises and utilizes the first chilled water return main cold or the utilization that for calculating the cold meter 17 of cold, gather current central air-conditioning that are arranged on chilled water return main 36 to be arranged on the first chilled water water main cold that gathers current central air-conditioning for calculating the cold meter 17 of cold on chilled water water main 35 for return main's cold.
S11: by the computing formula of the first efficiency value: the first efficiency value=the first chilled water is for return main's cold/(the first refrigerator instantaneous electric power+the first coolant pump instantaneous electric power+the first cooling tower instantaneous electric power), calculate the first efficiency value the storage of current central air-conditioning heat source side, the data-signal that the calculating of this first efficiency value only gathers current central air-conditioning heat source side environment calculates, and more accurately realizes according to the operational energy efficiency control blower fan of cooling tower 50 of heat source side blower fan of cooling tower 50 and dynamically controlling.
S12: whether the first efficiency value, the first chilled water that judgement calculates exceed default percentage or no process default optimization time interval timing time with respect to central air conditioner system acquiescence or last the 3rd efficiency value, the 3rd chilled water stored in delay time optimized for the variation of return main's cold and the 3rd temperature value for return main's cold and the first temperature value, trigger condition using judged result in step S1, stops blower fan of cooling tower 50 according to one of judged result control.In the specific implementation, can be arranged on 5～15% by presetting percentage, default percentage is less, and its control is more accurate.The value of optimizing time interval timing time can be 0～60min.
Particularly, step S12 comprises:
S120: if the first efficiency value reduces and exceedes default percentage than the variation of the 3rd efficiency value, if default percentage is 10%, if the first efficiency value be the 3rd efficiency value 90% or following, control and stop a blower fan of cooling tower 50; Otherwise execution step S123.Or
S121: if the first chilled water increases and reduces default percentage for the variation of return main's cold than the 3rd chilled water for return main's cold, if default percentage is 10%, if the first chilled water for return main cold be the 3rd chilled water for return main's cold 90% or following, control and stop a blower fan of cooling tower 50; Otherwise execution step S123.Or
S122: if the first temperature value reduces and exceedes default percentage than the variation of the 3rd temperature value, if default percentage is 10%, if the first temperature value be the 3rd temperature value 90% or following, control and stop a blower fan of cooling tower 50; Otherwise execution step S123.
S123: be 30min if default optimization time interval timing time is set, from default optimization delay time within 30min, the condition of step S121, S122 or S123 thrin occurs, directly control and stop a blower fan of cooling tower 50, without according to step S123, otherwise after 30min, control and stop a blower fan of cooling tower 50 after default optimization delay time.
S13: stop after a blower fan of cooling tower 50 in control, the first efficiency value, the first chilled water are stored as to the 3rd efficiency value, the 3rd chilled water for return main's cold and the 3rd temperature value, using the basis as optimize calculating next time for return main's cold and the renewal of the first temperature value.
S2: after the default shutdown delay time stopping after a blower fan of cooling tower 50, calculate the second efficiency value of current central air-conditioning heat source side.Particularly, step S2 comprises:
S20: after the default shutdown delay time (as 15min) stopping after a blower fan of cooling tower 50, the second chilled water that gathers current central air-conditioning for calculating the cold meter 17 of cold that utilization is arranged on chilled water return main 36 or chilled water water main 35 supplies return main's cold, the first instantaneous electric power meter 11 that utilization is arranged on refrigerator 30 gathers the second refrigerator instantaneous electric power, the second instantaneous electric power meter 12 that utilization is arranged on coolant pump 31 gathers the second coolant pump instantaneous electric power, the 3rd instantaneous electric power meter 13 that utilization is arranged on cooling tower 40 gathers the second cooling tower instantaneous electric power storage.
S21: utilize described the second chilled water to pass through the computing formula of the second efficiency value for return main's cold, the second refrigerator instantaneous electric power, the second coolant pump instantaneous electric power and the second cooling tower instantaneous electric power: the second efficiency value=the second chilled water, for return main's cold/(the second refrigerator instantaneous electric power+the second coolant pump instantaneous electric power+the second cooling tower instantaneous electric power), calculates the second efficiency value.
S3: the relatively size of the first efficiency value and the second efficiency value, if relative the first efficiency value of the second efficiency value reduces, correspondingly increase a blower fan of cooling tower 50, otherwise the second efficiency value is updated to the first efficiency value, repeating step S2, S3.In the situation that increasing a blower fan of cooling tower 50, repeating step S2, S3, again relatively obtain relative the first efficiency value of the second efficiency value and reduce, and corresponding control stops a blower fan of cooling tower 50.When repeating step S2, S3 occur to next trigger condition.
To sum up, in the situation that increasing a blower fan of cooling tower 50, if relative the first efficiency value of the second efficiency value reduces, corresponding control stops a blower fan of cooling tower 50; In the situation that stopping a blower fan of cooling tower, if relative the first efficiency value of the second efficiency value reduces, a blower fan of cooling tower 50 is increased in corresponding control, to realize in central air conditioner system running, according to efficiency value, change increasing or stopping of Automatic Optimal control blower fan of cooling tower, make the operational energy efficiency of central air conditioner system in higher level, thereby reach energy-conservation object, better than manually-operated mode implementation result, and not affected by extraneous factor.
Fig. 5 illustrates the flow chart of the air-condition cooling tower blower control method of optimizing based on efficiency in the embodiment of the present invention 3.The air-condition cooling tower blower control method based on efficiency optimization in embodiment 3 is to realize on the basis of embodiment 1 and embodiment 2, in the step S1 in embodiment 1 and embodiment 2, also comprises:
S14: utilize the first thermometer 14 Real-time Collection cooling water house steward 32 temperature values that are arranged on cooling water house steward 32, utilize the second thermometer 15 cooling water return main 33 temperature values that are arranged on cooling water return main 33.
S15: cooling water house steward 32 temperature values that collect, cooling water return main 33 temperature values and cooling water supply temperature protection value (as 38 degree) and cooling water return water temperature protection value (as 22 degree) are compared; if cooling water house steward 32 temperature values (as 40 when spend) are higher than cooling water supply temperature protection value; increase a blower fan of cooling tower 50, carry out the step S2～S3 in embodiment 1.If cooling water return main 33 temperature values (as 20 when spend) during lower than cooling water return water temperature protection value, stop a blower fan of cooling tower 50, carry out the step S2～S3 in embodiment 2.
In embodiment 1～3, each blower fan of cooling tower 50 of increasing of controlling is the shortest blower fan of cooling tower 50 of accumulated running time; Stop blower fan of cooling tower 50 for the longest blower fan of cooling tower 50 of accumulated running time, to guarantee the bulk life time of air-condition cooling tower blower fan 50 at every turn.
Air-condition cooling tower blower control method and the system of optimizing based on efficiency provided by the present invention, according to the efficiency value in central air conditioner system running, change increasing or stopping of Automatic Optimal control blower fan of cooling tower 50, make the operational energy efficiency of central air conditioner system in higher level, thereby reach energy-conservation object, by the operation number of units of the highest blower fan of cooling tower constantly of optimizing process control efficiency value, make the operational energy efficiency of central air conditioner system in higher level, significantly reduce central air conditioner system energy consumption.The method and System Implementation do not rely on administrative staff's operation, and implementation result is good; And be not subject to the impact of outdoor temperature variation and system requirements cold load uncertain factor, guarantee the efficiency of system optimized operation.
The present invention describes by several specific embodiments, it will be appreciated by those skilled in the art that, without departing from the present invention, can also carry out various conversion and be equal to alternative the present invention.In addition, for particular condition or concrete condition, can make various modifications to the present invention, and not depart from the scope of the present invention.Therefore, the present invention is not limited to disclosed specific embodiment, and should comprise the whole embodiments that fall within the scope of the claims in the present invention.
Claims (9)
1. an air-condition cooling tower blower control method of optimizing based on efficiency, is characterized in that: comprise the following steps:
S1: after trigger condition occurs, calculate the first efficiency value of current central air-conditioning heat source side, and control and increase or stop a blower fan of cooling tower (50);
S2: increasing or stopping default the adding after machine delay time or default shutdown delay time after a blower fan of cooling tower (50), calculate the second efficiency value of current central air-conditioning heat source side;
S3: the relatively size of the first efficiency value and the second efficiency value, if relative the first efficiency value of the second efficiency value reduces, correspondingly stops or increasing a blower fan of cooling tower (50), otherwise the second efficiency value is updated to the first efficiency value, repeating step S2.
2. the air-condition cooling tower blower control method of optimizing based on efficiency according to claim 1, is characterized in that: described step S1 comprises the following steps:
S10: every a default optimization delay time, gather the first chilled water of current central air-conditioning for the first outdoor temperature value of return main's cold, the first refrigerator instantaneous electric power, the first coolant pump instantaneous electric power, the first cooling tower instantaneous electric power and cooling tower (40) storage;
S11: the first efficiency value the storage of calculating current central air-conditioning heat source side;
S12: judge whether the first efficiency value, the first chilled water exceed default percentage or no process default optimization time interval timing time with respect to central air conditioner system acquiescence or last the 3rd efficiency value, the 3rd chilled water stored in delay time optimized for the variation of return main's cold and the 3rd temperature value for return main's cold and the first temperature value, and control is increased or stopped blower fan of cooling tower (50) according to judged result; Wherein, described judged result is the trigger condition in step S1;
S13: the first efficiency value, the first chilled water are stored as to the 3rd efficiency value, the 3rd chilled water for return main's cold and the 3rd temperature value, repeating step S10 for return main's cold and the renewal of the first temperature value.
3. the air-condition cooling tower blower control method of optimizing based on efficiency according to claim 2, is characterized in that: described step S12 comprises:
S120: if the first efficiency value exceedes default percentage than the variation increase of the 3rd efficiency value, control and increase blower fan of cooling tower (50); If the first efficiency value reduces and exceedes default percentage than the variation of the 3rd efficiency value, control and stop blower fan of cooling tower (50); Otherwise execution step S123; Or
S121: if the first chilled water exceedes default percentage than the 3rd chilled water for the variation increase of return main's cold for return main's cold, control and increase blower fan of cooling tower (50); If the first chilled water reduces and exceedes default percentage for the variation of return main's cold than the 3rd chilled water for return main's cold, control and stop blower fan of cooling tower (50); Otherwise execution step S123; Or
S122: if the first temperature value exceedes default percentage than the variation increase of the 3rd temperature value, control and increase blower fan of cooling tower (50); If the first temperature value reduces and exceedes default percentage than the variation of the 3rd temperature value, control and stop blower fan of cooling tower (50); Otherwise execution step S123;
S123: after a default optimization time interval timing time arrives, control and increase or stop blower fan of cooling tower (50); Otherwise repeating step S120～S122.
4. the air-condition cooling tower blower control method of optimizing based on efficiency according to claim 1, is characterized in that: described step S1 also comprises:
S14: Real-time Collection cooling water house steward (32) temperature value, cooling water return main (33) temperature value;
S15: if cooling water house steward (32) temperature value is higher than cooling water supply temperature protection value, increase a blower fan of cooling tower (50); If cooling water return main (33) temperature value during lower than cooling water return water temperature protection value, stops a blower fan of cooling tower (50); Otherwise repeating step S14.
5. according to the air-condition cooling tower blower control method of optimizing based on efficiency described in claim 1 ~ 4, it is characterized in that: described step S2 comprises:
S20: add machine delay time or stopping after the default shutdown delay time after a blower fan of cooling tower (50) increasing default after a blower fan of cooling tower (50), gathering the second chilled water of current central air-conditioning for return main's cold, the second refrigerator instantaneous electric power, the second coolant pump instantaneous electric power, the second cooling tower instantaneous electric power storage;
S21: utilize described the second chilled water to calculate described the second efficiency value for return main's cold, the second refrigerator instantaneous electric power, the second coolant pump instantaneous electric power and the second cooling tower instantaneous electric power.
6. the air-condition cooling tower blower control method of optimizing based on efficiency according to claim 5, is characterized in that: described the first efficiency value and the second efficiency value adopt following formula to calculate:
The first efficiency value=the first chilled water is for return main's cold/(the first refrigerator instantaneous electric power+the first coolant pump instantaneous electric power+the first cooling tower instantaneous electric power);
The second efficiency value=the second chilled water is for return main's cold/(the second refrigerator instantaneous electric power+the second coolant pump instantaneous electric power+the second cooling tower instantaneous electric power).
7. the air-condition cooling tower blower control method of optimizing based on efficiency according to claim 6, is characterized in that: the blower fan of cooling tower (50) of at every turn increasing is the shortest blower fan of cooling tower (50) of accumulated running time; Stop blower fan of cooling tower (50) for the longest blower fan of cooling tower (50) of accumulated running time at every turn.
8. an air-condition cooling tower blower fan control system of optimizing based on efficiency, is characterized in that: the control chip (20) that comprises the data acquisition unit (10) of the data message for gathering central air-conditioning environment, is connected with at least one blower fan of cooling tower (50) with described data acquisition unit (10), described data acquisition unit (10) comprises the first instantaneous electric power meter (11) being arranged on refrigerator, be arranged on the second instantaneous electric power meter (12) on coolant pump, be arranged on the 3rd instantaneous electric power meter (13) on cooling tower (40), be arranged on the first thermometer (14) of cooling water house steward (32), be arranged on the second thermometer (15) of cooling water return main (33), be arranged on the 3rd outdoor thermometer (16) of cooling tower (40) and be arranged on cold meter (17) or four thermometer and the flowmeter of chilled water for return main.
9. the air-condition cooling tower blower fan control system of optimizing based on efficiency according to claim 8, is characterized in that: described control chip (20) comprises data processing unit (21), the timing unit for timing (22) being connected with described data processing unit (21) and the memory cell for storing data information (23) being connected with described data processing unit (21) for processing data information being become to control information.
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| CN107345777A (en) * | 2017-07-06 | 2017-11-14 | 扬州大学 | Cooling tower half adjusts the determination method that blower fan whole year frequency conversion becomes angle and optimizing operating scheme |
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| CN112524767A (en) * | 2020-12-07 | 2021-03-19 | 佛山市顺德区美的电子科技有限公司 | Air conditioner control method, air conditioner control device, air conditioner and storage medium |
| CN113644811A (en) * | 2021-08-06 | 2021-11-12 | 湖南优利泰克自动化系统有限公司 | Control method of cooling fan of wind power converter |
| CN113865042A (en) * | 2021-09-13 | 2021-12-31 | 湖南桅灯智能科技有限公司 | Building fresh air processor cold energy transmission efficiency early warning method and device |
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| CN113916024A (en) * | 2021-10-26 | 2022-01-11 | 珠海格力电器股份有限公司 | Management method, device and equipment of cooling tower, cooling tower and temperature control system |
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