CN104566787A - Energy-saving control method and control system of water chilling unit - Google Patents
Energy-saving control method and control system of water chilling unit Download PDFInfo
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- CN104566787A CN104566787A CN201410788118.5A CN201410788118A CN104566787A CN 104566787 A CN104566787 A CN 104566787A CN 201410788118 A CN201410788118 A CN 201410788118A CN 104566787 A CN104566787 A CN 104566787A
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- water chilling
- chilling units
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- liquid temp
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0001—Control or safety arrangements for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
Abstract
The invention discloses an energy-saving control method and a control system of a water chilling unit. Through acquiring the average load percentage and average liquid outlet temperature of all running water chilling units or actual liquid supply temperature of a liquid supply main pipe of a heat exchanging system, and comparing the average load percentage with current-level loading set threshold or deloading set threshold and comparing the average liquid outlet temperature or actual liquid supply temperature with the set liquid supply temperature, the implementation of loading or deloading or holding the current state of the water chilling units is determined; the data acquisition during the water chilling unit loading and deloading control process is simplified, the energy consumption of the water chilling units is saved further, it is proved that, 10-20% of energy consumption can be saved by the control method provided by the embodiment of the invention.
Description
Technical field
The present invention relates to handpiece Water Chilling Units control field, especially, relate to a kind of energy-saving control method and control system of handpiece Water Chilling Units.
Background technology
" heart " of handpiece Water Chilling Units not still central air conditioner system, " the energy consumption rich and influential family " of central air conditioner system especially, it is very important for carrying out Energy Saving Control to handpiece Water Chilling Units, is the shortcut of " saving energy and reduce the cost ", and therefore, handpiece Water Chilling Units group control system is arisen at the historic moment.
Existing handpiece Water Chilling Units group control system determines the quantity of handpiece Water Chilling Units number of units and the related facility put into operation according to actual refrigeration duty, to reach best power save mode, simultaneously, the ruuning situation of overall monitor calculator room equipment, realizes fully automatic operation and the interlocked control of the equipment such as handpiece Water Chilling Units, chilled water pump, cooling water pump, cooling tower, electric butterfly valve.Wherein, the equipment such as chilled water pump, cooling water pump, cooling tower all match with handpiece Water Chilling Units, and handpiece Water Chilling Units group control system is a kind of " dispatch automated system " in essence, and its core is exactly " adding machine " algorithm of handpiece Water Chilling Units.
" adding machine " algorithm of existing handpiece Water Chilling Units group control system is unalterable, merely with the foundation that this limiting value of the refrigerating capacity of design conditions is adding machine, according to formula: Q=K × M × (T1-T2) calculates actual cooling load; Wherein, Q is cooling load, K is the specific heat coefficient of cycling hot, M is handpiece Water Chilling Units circulating fluid flow rate, T1 is cold-water return house steward temperature, T2 is cold water water main temperature.Calculate actual refrigerating capacity, compared with the refrigerating capacity set with handpiece Water Chilling Units, when being greater than the refrigerating capacity of handpiece Water Chilling Units setting, then add machine (rerun 1 handpiece Water Chilling Units and corresponding chilled water pump, cooling water pump, cooling tower etc.); If 2 handpiece Water Chilling Units are run, and when the refrigerating capacity of the reality calculated is less than or equal to the refrigerating capacity of 1 handpiece Water Chilling Units setting, then subtract machine (1 handpiece Water Chilling Units out of service and corresponding chilled water pump, cooling water pump, cooling tower etc.).Adopt and set refrigerating capacity as according to when judging the adding machine of handpiece Water Chilling Units with handpiece Water Chilling Units, acquisition parameter is needed to calculate the actual cooling load of handpiece Water Chilling Units on the one hand, add design cost and control difficulty, on the other hand, using the refrigerating capacity of design conditions as the foundation of adding machine, sufficiently and reasonably cannot utilize the refrigerating capacity of existing cooling unit, cause the situation of " when can not add machine; add machine " and " when can subtract machine; do not subtract machine in time ", cause whole water chilling unit system not energy-conservation.
Summary of the invention
The invention provides a kind of energy-saving control method and control system of handpiece Water Chilling Units, have technical problem to be hoisted to solve the complicated and energy-saving effect of existing handpiece Water Chilling Units " adding machine " control procedure.
According to an aspect of the present invention, provide a kind of energy-saving control method of handpiece Water Chilling Units, the quantity run for the handpiece Water Chilling Units that heat exchanging system is corresponding carries out adding Control of decreasing load, and control method comprises:
Obtain the setting of heat-exchange system for liquid temp, when prime loading setting threshold value and off-load setting threshold value;
Gather corresponding actual in liquid temp of the feed flow house steward on average going out liquid temp or heat-exchange system corresponding to handpiece Water Chilling Units that run;
Gather the load percentage of each handpiece Water Chilling Units run, and the average load percentage that the handpiece Water Chilling Units calculating operation is corresponding;
Comparison on average goes out liquid temp or actual set for the size of liquid temp, average load percentage and loading the size that threshold value and off-load sets threshold value for liquid temp and setting, determines the loading of execution handpiece Water Chilling Units, off-load or maintenance current state;
Delay predetermined time, after system stability, re-executes above-mentioned control operation.
Further, determine the loading of execution handpiece Water Chilling Units, off-load or keep current state to comprise:
When on average go out liquid temp or actual for liquid temp > setting for liquid temp, and average load percentage > when prime loads set threshold value time, then load operation is carried out to unit;
When on average go out liquid temp or actual for liquid temp > setting for liquid temp, and average load percentage≤when prime loads setting threshold value, then keep current state constant;
When on average go out liquid temp or actual for liquid temp≤setting for liquid temp, and average load percentage > is when prime off-load sets threshold value, then maintenance current state is constant;
When on average going out liquid temp or actual confession liquid temp≤setting confession liquid temp, and average load percentage≤when prime off-load setting threshold value, then off-load operation is carried out to unit.
Further, setting at different levels loading setting threshold value and/or off-load setting threshold value adjustable.
Further, the span loading setting threshold value is between 95 ~ 100%;
The value formula of off-load setting threshold value is: T=(N-1)/N*100%, and wherein, T is off-load setting threshold value, and N is the quantity of handpiece Water Chilling Units run when prime, N value be more than or equal to 2 natural number.
Further, the actual liquid temp that supplies that the feed flow house steward of collection heat-exchange system is corresponding detects through the temperature sensor be located on feed flow house steward; Or
The liquid temp that on average goes out that the handpiece Water Chilling Units of collection operation is corresponding comprises:
The fluid temperature signal of each the handpiece Water Chilling Units run is obtained through communication protocol;
The fluid temperature signal received is averaged and is on average gone out liquid temp, wherein, on average go out the quantity outing the handpiece Water Chilling Units of liquid temp sum/operation of the handpiece Water Chilling Units of liquid temp=operation.
Further, gather the load percentage of each handpiece Water Chilling Units run, and the step of average load percentage corresponding to the handpiece Water Chilling Units calculating operation comprises:
The load percentage of each the handpiece Water Chilling Units run is obtained through communication protocol;
Computing draws average load percentage, wherein, and the quantity of the handpiece Water Chilling Units of the load percentage sum/operation of the handpiece Water Chilling Units of average load percentage=operation.
According to a further aspect in the invention, also provide a kind of energy-saving control system of handpiece Water Chilling Units, the quantity run for the handpiece Water Chilling Units that heat exchanging system is corresponding carries out adding Control of decreasing load, and control system comprises:
Initial parameter acquiring unit, for obtaining the setting of heat-exchange system for liquid temp, when prime loading setting threshold value and off-load setting threshold value;
Temperature acquiring unit, corresponding actual in liquid temp of the feed flow house steward of what the handpiece Water Chilling Units for gathering operation was corresponding on average go out liquid temp or heat-exchange system;
Load percentage acquiring unit, for gathering the load percentage of each handpiece Water Chilling Units of operation, and the average load percentage that the handpiece Water Chilling Units calculating operation is corresponding;
Comparison control unit, on average go out liquid temp for comparison or actual set for the size of liquid temp, average load percentage and loading the size that threshold value and off-load sets threshold value for liquid temp and setting, determining the loading of execution handpiece Water Chilling Units, off-load or maintenance current state;
Delays time to control unit, for delay predetermined time, after system stability, re-executes the unit of above-mentioned control operation.
Further, comparison control unit comprises:
Load operation module, for ought on average go out liquid temp or actual for liquid temp > setting for liquid temp, and average load percentage > when prime loads set threshold value time, then load operation is carried out to unit;
Off-load operational module, for liquid temp or actual confession liquid temp≤setting confession liquid temp on average ought be gone out, and average load percentage≤when prime off-load setting threshold value, then off-load operation is carried out to unit;
Keep operational module, for ought on average go out liquid temp or actual for liquid temp > setting for liquid temp, and average load percentage≤when prime loads setting threshold value; Or
When on average going out liquid temp or actual confession liquid temp≤setting confession liquid temp, and average load percentage > is when prime off-load setting threshold value; Then keep current state constant.
Further, control system also comprises:
Initial parameter setting unit, for regulating the loading of setting at different levels setting threshold value and/or off-load setting threshold value.
Further, the span loading setting threshold value is between 95 ~ 100%;
The value formula of off-load setting threshold value is: T=(N-1)/N*100%, and wherein, T is off-load setting threshold value, and N is the quantity of handpiece Water Chilling Units run when prime, N value be more than or equal to 2 natural number.
Further, temperature acquiring unit comprises: temperature collect module, for gathering the temperature signal that the temperature sensor be located on feed flow house steward detects; Or
Temperature acquiring unit comprises:
Temperature signal receiver module, for obtaining the fluid temperature signal of each the handpiece Water Chilling Units run through communication protocol;
Equalization module, on average being gone out liquid temp for being averaged the fluid temperature signal received, wherein, on average being gone out the quantity outing the handpiece Water Chilling Units of liquid temp sum/operation of the handpiece Water Chilling Units of liquid temp=operation.
Further, load percentage acquiring unit comprises:
Communication module, for obtaining the load percentage of each the handpiece Water Chilling Units run through communication protocol;
Equalization module, draws average load percentage for computing, wherein, and the quantity of the handpiece Water Chilling Units of the load percentage sum/operation of the handpiece Water Chilling Units of average load percentage=operation.
The present invention has following beneficial effect:
The energy-saving control method of handpiece Water Chilling Units of the present invention and control system, by gathering the average load percentage of each handpiece Water Chilling Units run, on average go out the actual in liquid temp of the feed flow house steward of liquid temp or heat-exchange system, the size that threshold value and off-load set threshold value is set with loading when prime through comparison average load percentage, on average go out liquid temp or the actual size supplying liquid temp for liquid temp and setting, determine the loading performing handpiece Water Chilling Units, off-load or maintenance current state, both simplify handpiece Water Chilling Units and add data acquisition in off-load control procedure, be conducive to again the energy consumption of saving handpiece Water Chilling Units further, empirical tests, the present embodiment control method is adopted to save energy consumption 10%-20%.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic flow sheet of the energy-saving control method of preferred embodiment of the present invention handpiece Water Chilling Units; And
Fig. 2 is the principle block diagram of the energy-saving control system of preferred embodiment of the present invention handpiece Water Chilling Units.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
The energy-saving control method of the present embodiment handpiece Water Chilling Units and control system, change the external parameter of traditional handpiece Water Chilling Units after testing to calculate its refrigerating capacity, and the size of the refrigerating capacity of the refrigerating capacity of contrast conting and design conditions and the actual control strategy supplying the adding machine supplying the size of liquid temp to control unit of liquid temp and setting to operate, according to the performance curve of handpiece Water Chilling Units actual motion, with the load percentage in the running of handpiece Water Chilling Units for alignment parameters, the average load percentage corresponding by the handpiece Water Chilling Units of comparison actual motion sets threshold value with loading, the size of off-load setting threshold value, corresponding actual in liquid temp and the size of setting for liquid temp of the feed flow house steward on average going out liquid temp or heat-exchange system corresponding to each handpiece Water Chilling Units run, control the adding machine operation of unit, not only simplify control procedure, further improves the energy-saving horizontal of system.
The preferred embodiments of the present invention provide a kind of energy-saving control method of handpiece Water Chilling Units, the quantity run for the handpiece Water Chilling Units that heat exchanging system is corresponding carries out adding Control of decreasing load, to meet the reliability service of system, and improves the energy-saving level of system, with reference to Fig. 1, the present embodiment control method comprises:
Step S101, obtains the setting of heat-exchange system for liquid temp, when prime loading setting threshold value and off-load setting threshold value;
Pass through processor herein and the setting needed for initialization system operation can set threshold value for liquid temp, loading setting threshold value, off-load, wherein, off-load sets threshold value need according to the quantity respective settings of the handpiece Water Chilling Units run.
Under normal circumstances, the refrigerating capacity of the handpiece Water Chilling Units in running is all greater than the refrigerating capacity of design conditions, therefore the refrigerating capacity of handpiece Water Chilling Units is detected without the need to reality, if the load percentage of cooling unit is not 100%, then represent that handpiece Water Chilling Units can also increase acting, can also continue to provide refrigerating capacity, therefore in actual applications, the actual refrigerating capacity of handpiece Water Chilling Units can be cast aside completely, using the load percentage of handpiece Water Chilling Units as the foundation of adding machine, when 1 handpiece Water Chilling Units is run, and the load percentage of unit is when being 100%, the refrigerating capacity of expression unit has been maximum, if chilled water leaving water temperature is also higher than setting value, now need to add machine, if 2 handpiece Water Chilling Units are run, the load percentage of every platform unit all lower than 50%, then subtracts machine.
In the present embodiment, alternatively, the span loading setting threshold value is between 95 ~ 100%, and preferably, loading setting threshold value is 100%, to make full use of the refrigerating capacity of the handpiece Water Chilling Units of operation.
Alternatively, the value formula of off-load setting threshold value is: T=(N-1)/N*100%, and wherein, T is off-load setting threshold value, and N is the quantity of handpiece Water Chilling Units run when prime, N value be more than or equal to 2 natural number.Certainly, it will be understood by those skilled in the art that off-load setting threshold value according to practical situations, suitably can adjust near this span.Now illustrate, during as two handpiece Water Chilling Units operations, off-load setting threshold value is 50%; When three handpiece Water Chilling Units are run, off-load setting threshold value is 67%; When four handpiece Water Chilling Units are run, off-load setting threshold value is 75%, the like.
Alternatively, in one embodiment, initialized setting supplies liquid temp, can adjust according to applicable cases, with the energy-saving level of elevator system when prime loads in setting threshold value and the running of off-load setting threshold value in handpiece Water Chilling Units.
Step S102, gather run each handpiece Water Chilling Units actual go out liquid temp, and the handpiece Water Chilling Units calculating operation corresponding on average go out liquid temp;
In the present embodiment, by communication protocol obtain run each handpiece Water Chilling Units corresponding actual go out liquid temp, and average is got to each temperature signal of real-time reception on average can be gone out liquid temp, wherein, each handpiece Water Chilling Units corresponding actual go out liquid temp gathered voluntarily by the control system of handpiece Water Chilling Units, therefore the present embodiment is without the need to arranging additional temperature sensor, save the cost of system.
Alternatively, the present embodiment step S102 comprises:
A, obtain the fluid temperature signal of each handpiece Water Chilling Units run through communication protocol;
B, the fluid temperature signal received is averaged and is on average gone out liquid temp, wherein, on average go out the quantity outing the handpiece Water Chilling Units of liquid temp sum/operation of the handpiece Water Chilling Units of liquid temp=operation.
Receiving each temperature signal by processor, because each temperature signal is data signal, therefore without the required precision of collection of simulant signal, and carrying out collecting temperature signal without the need to arranging sensor.
In other embodiments, above-mentioned on average go out liquid temp and can replace with corresponding actual in liquid temp of the feed flow house steward of heat-exchange system, in this substitute mode, only need on the feed flow house steward of heat-exchange system set temperature sensor to detect the temperature of feed flow house steward in real time, the mean value going out liquid temp due to each handpiece Water Chilling Units run is equivalent to the temperature on the feed flow house steward of heat-exchange system, therefore supply liquid temp by the temperature of comparison feed flow house steward with default, also similar control effects can be reached, the parameter on average going out liquid temp is hereinafter also corresponding replaces with actual confession liquid temp.
Step S103, gathers the load percentage of each handpiece Water Chilling Units run, and the average load percentage that the handpiece Water Chilling Units calculating operation is corresponding;
In the present embodiment, the load percentage of each handpiece Water Chilling Units of operation, is added up by the control system of respective handpiece Water Chilling Units.In a specific embodiment, step S103 comprises:
The load percentage of each the handpiece Water Chilling Units run is obtained through communication protocol; Namely central processing unit obtains the load percent data of the handpiece Water Chilling Units of each operation by wired or communication;
Computing draws average load percentage, wherein, and the quantity of the handpiece Water Chilling Units of the load percentage sum/operation of the handpiece Water Chilling Units of average load percentage=operation.Central processing unit is after obtaining corresponding load percent data, and the computing through above-mentioned formula can obtain average load percentage.
Step S104, comparison on average goes out liquid temp and the size of setting for liquid temp, when on average going out liquid temp and being greater than setting for liquid temp, then performs step S105, otherwise performs step S107;
Step S105, comparison average load percentage sets the size of threshold value with loading, when average load percentage is greater than loading setting threshold value, then performs step S106, otherwise perform step S108;
Step S106, load operation is carried out to unit, namely setting is greater than for liquid temp when on average going out liquid temp, and average load percentage be greater than when prime load setting threshold value time unit is loaded, load operation herein refers to: to rerun a handpiece Water Chilling Units and corresponding chilled water pump, cooling water pump, cooling tower etc. by generating instruction, to meet the work requirements of heat-exchange system.
Step S107, comparison average load percentage and off-load set the size of threshold value, when average load percentage is greater than off-load setting threshold value, then performs step S108, otherwise perform step S109;
Step S108, keeps current state, be namely greater than setting for liquid temp when on average going out liquid temp, and average load percentage is less than or equal to when prime loads setting threshold value, then keeps current state constant; Or on average ought go out liquid temp and be less than or equal to setting for liquid temp, and average load percentage is greater than when prime off-load setting threshold value, then keep current state constant;
Step S109, carries out off-load operation to unit, is namely less than or equal to setting for liquid temp when on average going out liquid temp, and average load percentage is less than or equal to when prime off-load setting threshold value, then carry out off-load operation to unit.
Step S110, delay predetermined time, after system stability, re-executes above-mentioned control operation.Wherein, when system is for maintenance current state, then the scheduled time can be set as zero, in the present embodiment, alternatively, will be set as 10 minutes the scheduled time after system performs loading or off-load operation, that namely within every 10 minutes, carries out a handpiece Water Chilling Units adds off-load control operation.Certainly, it will be understood by those skilled in the art that the duration of time delay can set, with satisfied different demand for control.
With traditional by monitoring that the refrigerating capacity of handpiece Water Chilling Units is carried out adding compared with Control of decreasing load, the present embodiment control method not only eliminates the sensor of the flow arranged for detecting liquid feeding pipeline, save and control cost, and pass through with the load percentage of handpiece Water Chilling Units as basis for estimation, parameter acquiring is convenient, control strategy is simple, simultaneously by generating control strategy with load percentage, can the refrigerating capacity of existing handpiece Water Chilling Units in maximum using running, control by adding, subtracting machine in time, realize Energy Saving Control.Empirical tests, adopts the control method of the present embodiment, compared with existing control mode, energy-conservationly reaches 10% ~ 20%.
According to a further aspect in the invention, corresponding with control method of the present invention, also provide a kind of energy-saving control system of handpiece Water Chilling Units, the quantity run for the handpiece Water Chilling Units that heat exchanging system is corresponding carries out adding Control of decreasing load, and with reference to Fig. 2, this control system comprises:
Initial parameter acquiring unit 100, for obtaining the setting of heat-exchange system for liquid temp, when prime loading setting threshold value and off-load setting threshold value;
Temperature acquiring unit 200, corresponding actual in liquid temp of the feed flow house steward of what the handpiece Water Chilling Units for gathering operation was corresponding on average go out liquid temp or heat-exchange system;
Load percentage acquiring unit 300, for gathering the load percentage of each handpiece Water Chilling Units of operation, and the average load percentage that the handpiece Water Chilling Units calculating operation is corresponding;
Comparison control unit 400, on average goes out liquid temp for comparison and setting supplies the size of liquid temp, average load percentage and the size that loading sets threshold value, off-load sets threshold value, determines the loading of execution handpiece Water Chilling Units, off-load or keeps current state; Wherein, comparison control unit 400 comprises:
Load operation module 410, for ought on average go out liquid temp or actual for liquid temp > setting for liquid temp, and average load percentage > when prime loads set threshold value time, then load operation is carried out to unit;
Off-load operational module 420, for liquid temp or actual confession liquid temp≤setting confession liquid temp on average ought be gone out, and average load percentage≤when prime off-load setting threshold value, then off-load operation is carried out to unit;
Keep operational module 430, for ought on average go out liquid temp or actual for liquid temp > setting for liquid temp, and average load percentage≤when prime loads setting threshold value; Or on average ought go out liquid temp or actual confession liquid temp≤setting confession liquid temp, and average load percentage > is when prime off-load setting threshold value; Then keep current state constant;
Delays time to control unit 500, for delay predetermined time, after system stability, re-executes the unit of above-mentioned control operation.
The present embodiment control system is consistent with said method embodiment, and the specific implementation process of each unit can reference method embodiment, does not repeat them here.
Alternatively, this control system also comprises:
Initial parameter setting unit, for regulating the loading of setting at different levels setting threshold value and/or off-load setting threshold value.
In the present embodiment, alternatively, the span loading setting threshold value is between 95 ~ 100%, and preferably, loading setting threshold value is 100%, to make full use of the refrigerating capacity of the handpiece Water Chilling Units of operation.
Alternatively, the value formula of off-load setting threshold value is: T=(N-1)/N*100%, and wherein, T is off-load setting threshold value, and N is the quantity of handpiece Water Chilling Units run when prime, N value be more than or equal to 2 natural number.Certainly, it will be understood by those skilled in the art that off-load setting threshold value according to practical situations, suitably can adjust near this span.Now illustrate, during as two handpiece Water Chilling Units operations, off-load setting threshold value is 50%; When three handpiece Water Chilling Units are run, off-load setting threshold value is 67%; When four handpiece Water Chilling Units are run, off-load setting threshold value is 75%, the like.
Alternatively, in one embodiment, initialized setting supplies liquid temp, can adjust according to applicable cases, with the energy-saving level of elevator system when prime loads in setting threshold value and the running of off-load setting threshold value in handpiece Water Chilling Units.
Alternatively, temperature acquiring unit 200 comprises:
Temperature signal receiver module 210, for obtaining the fluid temperature signal of each the handpiece Water Chilling Units run through communication protocol;
First equalization module 220, on average being gone out liquid temp for being averaged the fluid temperature signal received, wherein, on average being gone out the quantity outing the handpiece Water Chilling Units of liquid temp sum/operation of the handpiece Water Chilling Units of liquid temp=operation.
In other embodiments, temperature acquiring unit 200 comprises temperature collect module, for gathering the temperature signal that the temperature sensor be located on feed flow house steward detects.
Alternatively, load percentage acquiring unit 300 comprises:
Communication module 310, for obtaining the load percentage of each the handpiece Water Chilling Units run through communication protocol;
Second equalization module 320, draws average load percentage for computing, wherein, and the quantity of the handpiece Water Chilling Units of the load percentage sum/operation of the handpiece Water Chilling Units of average load percentage=operation.
It should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. an energy-saving control method for handpiece Water Chilling Units, the quantity run for the handpiece Water Chilling Units that heat exchanging system is corresponding carries out adding Control of decreasing load, and it is characterized in that, described control method comprises:
Obtain the setting of described heat-exchange system for liquid temp, when prime loading setting threshold value and off-load setting threshold value;
Gather corresponding actual in liquid temp of the feed flow house steward on average going out liquid temp or described heat-exchange system corresponding to described handpiece Water Chilling Units that run;
The load percentage of handpiece Water Chilling Units described in each of collection operation, and the average load percentage that the described handpiece Water Chilling Units calculating operation is corresponding;
On average go out liquid temp or described reality described in comparison and set for the size of liquid temp, described average load percentage and described loading the size that threshold value and described off-load set threshold value for liquid temp and described setting, determine the loading of execution handpiece Water Chilling Units, off-load or maintenance current state;
Delay predetermined time, after system stability, re-executes above-mentioned control operation.
2. the energy-saving control method of handpiece Water Chilling Units according to claim 1, is characterized in that, determines the loading of execution handpiece Water Chilling Units, off-load or keeps current state to comprise:
On average go out liquid temp or described reality for setting described in liquid temp > for liquid temp when described, and described average load percentage > when load described in prime set threshold value time, then load operation is carried out to unit;
Liquid temp or described reality is on average gone out for setting described in liquid temp > for liquid temp when described, and described average load percentage≤when loading setting threshold value described in prime, then keep current state constant;
On average go out liquid temp or described reality for liquid temp≤described setting for liquid temp when described, and described average load percentage > is when described in prime during off-load setting threshold value, then maintenance current state is constant;
Liquid temp or described reality confession liquid temp≤described setting confession liquid temp is on average gone out when described, and described average load percentage≤when off-load described in prime sets threshold value, then off-load operation is carried out to unit.
3. the energy-saving control method of handpiece Water Chilling Units according to claim 2, is characterized in that,
It is adjustable that the described loading setting threshold value of setting at different levels and/or described off-load set threshold value.
4. the energy-saving control method of handpiece Water Chilling Units according to claim 3, is characterized in that,
The described span loading setting threshold value is between 95 ~ 100%;
The value formula of described off-load setting threshold value is: T=(N-1)/N*100%, and wherein, T is off-load setting threshold value, and N is the quantity of the described handpiece Water Chilling Units run when prime, N value be more than or equal to 2 natural number.
5. the energy-saving control method of handpiece Water Chilling Units according to claim 1, is characterized in that,
The actual liquid temp that supplies that the feed flow house steward of collection heat-exchange system is corresponding detects through the temperature sensor be located on described feed flow house steward; Or
The liquid temp that on average goes out that the described handpiece Water Chilling Units of collection operation is corresponding comprises:
The fluid temperature signal of each the described handpiece Water Chilling Units run is obtained through communication protocol;
The described fluid temperature signal received is averaged and obtains describedly on average going out liquid temp, wherein, the described quantity going out the described handpiece Water Chilling Units of liquid temp sum/operation on average going out the described handpiece Water Chilling Units of liquid temp=operation.
6. according to the energy-saving control method of the arbitrary described handpiece Water Chilling Units of claim 1 to 5, it is characterized in that, gather run each described in the load percentage of handpiece Water Chilling Units, and the step of average load percentage corresponding to the described handpiece Water Chilling Units calculating operation comprises:
The load percentage of each the described handpiece Water Chilling Units run is obtained through communication protocol;
Computing draws described average load percentage, wherein, and the quantity of the described handpiece Water Chilling Units of the load percentage sum/operation of the described handpiece Water Chilling Units of described average load percentage=operation.
7. an energy-saving control system for handpiece Water Chilling Units, the quantity run for the handpiece Water Chilling Units that heat exchanging system is corresponding carries out adding Control of decreasing load, and it is characterized in that, described control system comprises:
Initial parameter acquiring unit, for obtaining the setting of described heat-exchange system for liquid temp, when prime loading setting threshold value and off-load setting threshold value;
Temperature acquiring unit, corresponding actual in liquid temp of the feed flow house steward of what the described handpiece Water Chilling Units for gathering operation was corresponding on average go out liquid temp or described heat-exchange system;
Load percentage acquiring unit, for gather operation each described in the load percentage of handpiece Water Chilling Units, and the average load percentage that the described handpiece Water Chilling Units calculating operation is corresponding;
Comparison control unit, setting for the size of liquid temp, described average load percentage and described loading the size that threshold value and described off-load set threshold value for liquid temp and described setting on average going out liquid temp or described reality described in comparison, determining the loading of execution handpiece Water Chilling Units, off-load or maintenance current state;
Delays time to control unit, for delay predetermined time, after system stability, re-executes the unit of above-mentioned control operation.
8. the energy-saving control system of handpiece Water Chilling Units according to claim 7, is characterized in that, described comparison control unit comprises:
Load operation module, for on average going out liquid temp or described reality for setting described in liquid temp > for liquid temp when described, and described average load percentage > is when loading setting threshold value described in prime, then carry out load operation to unit;
Off-load operational module, on average going out liquid temp or described reality for liquid temp≤described setting for liquid temp when described, and described average load percentage≤when described in prime during off-load setting threshold value, then off-load operation is carried out to unit;
Keep operational module, on average going out liquid temp or described reality for setting described in liquid temp > for liquid temp when described, and described average load percentage≤when loading setting threshold value described in prime; Or
On average go out liquid temp or described reality confession liquid temp≤described setting confession liquid temp when described, and described average load percentage > is when off-load described in prime sets threshold value; Then keep current state constant.
9. the energy-saving control system of handpiece Water Chilling Units according to claim 8, is characterized in that, described control system also comprises:
Initial parameter setting unit, for regulating the described loading setting threshold value of setting at different levels and/or described off-load setting threshold value.
10. the energy-saving control system of handpiece Water Chilling Units according to claim 9, is characterized in that,
The described span loading setting threshold value is between 95 ~ 100%;
The value formula of described off-load setting threshold value is: T=(N-1)/N*100%, and wherein, T is off-load setting threshold value, and N is the quantity of the described handpiece Water Chilling Units run when prime, N value be more than or equal to 2 natural number.
The energy-saving control system of 11. handpiece Water Chilling Units according to claim 7, is characterized in that,
Described temperature acquiring unit comprises: temperature collect module, for gathering the temperature signal that the temperature sensor be located on described feed flow house steward detects; Or
Described temperature acquiring unit comprises:
Temperature signal receiver module, for obtaining the fluid temperature signal of each the described handpiece Water Chilling Units run through communication protocol;
Equalization module, obtains describedly on average going out liquid temp for being averaged the described fluid temperature signal received, wherein, and the described quantity going out the described handpiece Water Chilling Units of liquid temp sum/operation on average going out the described handpiece Water Chilling Units of liquid temp=operation.
12. according to the energy-saving control system of the arbitrary described handpiece Water Chilling Units of claim 7 to 11, and it is characterized in that, described load percentage acquiring unit comprises:
Communication module, for obtaining the load percentage of each the described handpiece Water Chilling Units run through communication protocol;
Equalization module, draws described average load percentage for computing, wherein, and the quantity of the described handpiece Water Chilling Units of the load percentage sum/operation of the described handpiece Water Chilling Units of described average load percentage=operation.
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| CN105546757A (en) * | 2016-01-05 | 2016-05-04 | 珠海格力电器股份有限公司 | Group control method and system for water chilling units |
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