CN106123215B - A kind of air conditioning cooling water system control method and device - Google Patents

A kind of air conditioning cooling water system control method and device Download PDF

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Publication number
CN106123215B
CN106123215B CN201610478441.1A CN201610478441A CN106123215B CN 106123215 B CN106123215 B CN 106123215B CN 201610478441 A CN201610478441 A CN 201610478441A CN 106123215 B CN106123215 B CN 106123215B
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cooling
cooling tower
temperature
tower
current
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CN106123215A (en
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王亚静
宋志春
聂志华
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Shijiazhuang Xinao Energy Development Co.,Ltd.
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POLYTRON TECHNOLOGIES Inc
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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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • 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
    • F24F2140/20—Heat-exchange fluid temperature

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Atmospheric Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)
  • Air Conditioning Control Device (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

The present invention relates to Air-condition system control technical field more particularly to a kind of air conditioning cooling water system control method and device, comprising: in air conditioning cooling water system, obtains current cooling water return water temperature and determines current outdoor wet-bulb temperature；If the temperature difference of current cooling water return water temperature and current outdoor wet-bulb temperature is greater than the first temperature difference threshold and there are the cooling towers that at least one is not opened, the first cooling tower is then opened according to preset optimization, first cooling tower is that the highest cooling tower of cooling efficiency in the cooling tower of non-open state is in the preset optimization.This method is when needing to open cooling tower, a highest cooling tower of the cooling efficiency that do not open is chosen according to preset optimization to be opened, it can be achieved quickly to reduce cooling water return water temperature, improve cooling efficiency, and can realize that default control condition can be reached by opening less cooling tower according to strategy unlatching cooling tower, to save system resource.

Description

A kind of air conditioning cooling water system control method and device
Technical field
The present invention relates to Air-condition system control technical field more particularly to a kind of air conditioning cooling water system control method and dresses It sets.
Background technique
As shown in Figure 1, being the architecture diagram of central air conditioner system in the prior art, wherein mainly including air conditioning water system System and air conditioning cooling water system, wherein air conditioning water system is made of refrigerating water pump, coiler fan and chilled water pipeline etc..From The low temperature chilled water of host evaporator outflow is pressurizeed by refrigerating water pump is sent into chilled water pipeline (water outlet), enters the room and carries out hot friendship It changes, takes away the heat in room, eventually pass back to host evaporator (return water), indoor fan is for blowing air over chilled water pipe Road reduces air themperature, heat exchange in accelerating chamber, i.e. air conditioning water system is mainly used for taking away the heat in room, for interior Cooling；Air conditioning cooling water system is mainly made of cooling pump, cooling water pipeline, cooling tower etc., due to air conditioning water system into While the heat exchange of row interior, indoor a large amount of thermal energy will be taken away, the thermal energy by the coolant transmission in host to cooling water, Increase cooling water temperature, the cooling water after then will heat up by cooling pump is pressed into cooling tower (water outlet), is cooled down, and reduces It is sent back to again after temperature main condenser (return water), thus air conditioning cooling water system is mainly used for air conditioning water system generation Amount of heat is taken away.
For air conditioning cooling water system therein, generally there is corresponding cooling water control strategy to carry out control cooling water and go out Coolant-temperature gage or cooling water return water temperature, for example, mainly having using more air conditioning cooling water system control strategy at present: fixed Cooling water inlet temperature difference control strategy, fixed cooling water leaving water temperature control strategy, fixed cooling water return water temperature control strategy Deng, wherein fixed cooling water inlet temperature difference control strategy refers to the control cooling water inlet temperature difference within a preset range, and fixation is cold But water leaving water temperature control strategy refers to control cooling water leaving water temperature within a preset range, fixed cooling water return water temperature control Strategy processed refers to control cooling water return water temperature within a preset range.
There is a cooling tower group in air conditioning cooling water system, cooling tower group has at least one cooling tower, and cooling tower is available It is controlled for above-mentioned various cooling water system control strategies with specific reference to corresponding strategy in reducing cooling water return water temperature When processed, in order to guarantee to meet control condition, in the prior art, typically by being randomly turned on or off air conditioning cooling water One or more cooling towers in system realize the rate for increasing and reducing cooling water return water temperature, or reduce reduction cooling The rate of water return water temperature.As an example it is assumed that one sharing 10 cooling towers in current air conditioning cooling water system, currently open 6 cooling towers have been opened for realizing cooling water return water temperature is reduced, if it is desired to realization further decreases cooling water return water temperature, Then rate of temperature fall can be increased, to realize into one by randomly increasing one or more cooling towers (being at most then turned on 4) Step ground reduces cooling water return water temperature；In addition, if the return water temperature of some cooling tower is lower than lower threshold in for a long time, assert Cooling effect reaches capacity, and can reduce fan energy consumption by closing extra blower.
Main problem existing for the strategy of cooling water return water temperature control is realized in above-mentioned air conditioning cooling water system is: opening All it is randomly selected when opening or close cooling tower, thus causes to can be only achieved sometimes for being turned on or off multiple cooling towers Preset effect causes tactful inefficiency and causes the waste of resource.
In conclusion be all the random cooling tower opened in air-conditioning system in prior art air conditioning cooling water control strategy, Cause the waste of tactful inefficiency and resource.
Summary of the invention
The present invention provides a kind of air conditioning cooling water system control method and device, to solve sky existing in the prior art It adjusts in cooling water control strategy, is all the random cooling tower opened in air-conditioning system, causes the wave of tactful inefficiency and resource The technical issues of taking.
On the one hand, the embodiment of the present invention provides a kind of air conditioning cooling water system control method, comprising:
It obtains the current cooling water return water temperature of air conditioning cooling water system and determines current outdoor wet-bulb temperature；
If the temperature difference of the current cooling water return water temperature and the current outdoor wet-bulb temperature is greater than the first temperature difference threshold, And there are the cooling towers that at least one is not opened, then according to preset optimization, open the first cooling tower, described first is cooling Tower is that the highest cooling tower of cooling efficiency in the cooling tower of non-open state is in the preset optimization, described pre- If optimization be to be ranked up according to the cooling efficiency of all cooling towers；
After setting duration, back to the step for obtaining current cooling water return water temperature and determining current outdoor wet-bulb temperature Suddenly.
Optionally, it is described obtain current cooling water return water temperature and current outdoor wet-bulb temperature after, further includes:
If the temperature difference of the current cooling water return water temperature and the current outdoor wet-bulb temperature less than the second temperature difference threshold, And there are the cooling towers that at least one has been switched on, then according to the preset optimization, close the second cooling tower, described the Two cooling towers are that the cooling tower that cooling efficiency is minimum in the cooling tower for the state that has turned on, institute are in the preset optimization The second temperature difference threshold is stated less than first temperature difference threshold；
After setting duration, back to the step for obtaining current cooling water return water temperature and determining current outdoor wet-bulb temperature Suddenly.
Optionally, the air conditioning cooling water system includes a cooling tower group, and the cooling tower group includes that at least one is cold But tower；
The preset optimization is determined according to following manner:
According to K group leaving water temperature data and least square method, the cooling effect of each cooling tower in the cooling tower group is determined Rate, every group of leaving water temperature data in the K group leaving water temperature data include that all cooling towers in the cooling tower group are all opened The leaving water temperature of the leaving water temperature of each cooling tower when opening and the cooling tower group, K are greater than or equal to N, and N is the cooling tower The quantity of cooling tower in group；
According to the cooling efficiency of each cooling tower in the cooling tower group, the preset optimization is determined.
Optionally, each cooling tower in the air conditioning cooling water system has corresponding valve, and each cooling tower packet Containing blower, the valve is used to control the flow of cooling tower；Before the first cooling tower of the unlatching, further includes:
If the corresponding valve of first cooling tower is in close state, the corresponding valve of first cooling tower is opened Door；
The first cooling tower of the unlatching, comprising:
Open the blower that first cooling tower includes.
Optionally, each cooling tower in the air conditioning cooling water system has corresponding valve, and each cooling tower packet Containing blower, the valve is used to control the flow of cooling tower；The second cooling tower of the closing, comprising:
Close the corresponding blower of second cooling tower；
It closes after the corresponding blower of second cooling tower, further includes:
Whether the metered flow after judging closing target valve is not less than target flow, and the target valve is the air-conditioning In the open state and corresponding cooling tower is in the valve of non-open state in cooling water system；
If it is determined that closing the metered flow after the target valve not less than the target flow, then the target valve is closed Door.
Optionally, the target flow is determined according to following method:
Obtain the current cooling water leaving water temperature of the air conditioning cooling water system, the current cooling water return water temperature and cold But load；
If it is determined that the temperature difference of the current cooling water leaving water temperature and the current cooling water return water temperature is in preset range It is interior, then according to the temperature difference of the current cooling water leaving water temperature and the current cooling water return water temperature and the cooling load, Determine the target flow；
If it is determined that the temperature difference of the current cooling water leaving water temperature and the current cooling water return water temperature is not described pre- If in range, then according to the cooling load, determining the target flow.
On the other hand, the embodiment of the present invention provides a kind of air conditioning cooling water system control device, comprising:
Acquiring unit, for obtaining the current cooling water return water temperature of air conditioning cooling water system and determining current outdoor wet bulb Temperature；
Opening unit, if the temperature difference for the current cooling water return water temperature and the current outdoor wet-bulb temperature is greater than First temperature difference threshold, and there are the cooling towers that at least one is not opened, then according to preset optimization, it is cooling to open first Tower, first cooling tower are highest for cooling efficiency in the cooling tower in the preset optimization in non-open state Cooling tower, the preset optimization are ranked up according to the cooling efficiency of all cooling towers；
Timing unit, for back to the current cooling water return water temperature of acquisition and determining current outdoor after setting duration The step of wet-bulb temperature.
Optionally, the air conditioning cooling water system control device further includes closing unit, is used for:
If the temperature difference of the current cooling water return water temperature and the current outdoor wet-bulb temperature less than the second temperature difference threshold, And there are the cooling towers that at least one has been switched on, then according to the preset optimization, close the second cooling tower, described the Two cooling towers are that the cooling tower that cooling efficiency is minimum in the cooling tower for the state that has turned on, institute are in the preset optimization The second temperature difference threshold is stated less than first temperature difference threshold；
The timing unit, is also used to: after setting duration, working as back to the current cooling water return water temperature of acquisition and determination Outside cup the step of wet-bulb temperature.
Optionally, the air conditioning cooling water system includes a cooling tower group, and the cooling tower group includes that at least one is cold But tower；
The air conditioning cooling water system control device further includes optimization determination unit, for being determined according to following manner The preset optimization:
According to K group leaving water temperature data and least square method, the cooling effect of each cooling tower in the cooling tower group is determined Rate, every group of leaving water temperature data in the K group leaving water temperature data include that all cooling towers in the cooling tower group are all opened The leaving water temperature of the leaving water temperature of each cooling tower when opening and the cooling tower group, K are greater than or equal to N, and N is the cooling tower The quantity of cooling tower in group；
According to the cooling efficiency of each cooling tower in the cooling tower group, the preset optimization is determined.
Optionally, each cooling tower in the air conditioning cooling water system has corresponding valve, and each cooling tower packet Containing blower, the valve is used to control the flow of cooling tower；The opening unit is also used to: if first cooling tower is corresponding Valve is in close state, then opens the corresponding valve of first cooling tower；And it opens first cooling tower and includes Blower.
Optionally, each cooling tower in the air conditioning cooling water system has corresponding valve, and each cooling tower packet Containing blower, the valve is used to control the flow of cooling tower；The closing unit, is specifically used for: closing second cooling tower Corresponding blower；And judging whether the metered flow after closing target valve is not less than target flow, the target valve is In the open state and corresponding cooling tower is in the valve of non-open state in the air conditioning cooling water system；If it is determined that closing Metered flow after the target valve is not less than the target flow, then closes the target valve.
Optionally, the air conditioning cooling water system control device further includes flow determination unit, for according to following method Determine the target flow:
Obtain the current cooling water leaving water temperature of the air conditioning cooling water system, the current cooling water return water temperature and cold But load；
If it is determined that the temperature difference of the current cooling water leaving water temperature and the current cooling water return water temperature is in preset range It is interior, then according to the temperature difference of the current cooling water leaving water temperature and the current cooling water return water temperature and the cooling load, Determine the target flow；
If it is determined that the temperature difference of the current cooling water leaving water temperature and the current cooling water return water temperature is not described pre- If in range, then according to the cooling load, determining the target flow.
Method provided in an embodiment of the present invention obtains the current cold of air conditioning cooling water system in air conditioning cooling water system But water return water temperature and determining current outdoor wet-bulb temperature；If the current cooling water return water temperature and the current outdoor wet bulb The temperature difference of temperature is greater than the first temperature difference threshold, and there are the cooling towers that at least one is not opened, then according to preset optimization, The first cooling tower is opened, first cooling tower is to be in cold in the cooling tower of non-open state in the preset optimization But the highest cooling tower of efficiency, the preset optimization are ranked up according to the cooling efficiency of all cooling towers；So Afterwards after setting duration, back to the step of obtaining current cooling water return water temperature and determining current outdoor wet-bulb temperature.The party Method realizes in air conditioning cooling water system, is that one is chosen according to preset optimization not when needing to open cooling tower The highest cooling tower of the cooling efficiency of unlatching, and open the cooling tower, thereby may be ensured that fast implement quickly reduce it is cold But water return water temperature, improves cooling efficiency, and when opening cooling tower according to the strategy, it is ensured that opens less cooling Tower can achieve the purpose that default control condition, so as to save system resource.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this For the those of ordinary skill in field, without any creative labor, it can also be obtained according to these attached drawings His attached drawing.
Fig. 1 is the architecture diagram of central air conditioner system in the prior art；
Fig. 2 (a) is air conditioning cooling water system architecture diagram in central air conditioner system in the prior art；
Fig. 2 (b) is air conditioning cooling water system architecture diagram in central air conditioner system in the prior art；
Fig. 3 is air conditioning cooling water system control method schematic diagram provided in an embodiment of the present invention；
Fig. 4 is air conditioning cooling water system control method detailed maps provided in an embodiment of the present invention；
Fig. 5 is air conditioning cooling water system control method detailed maps provided in an embodiment of the present invention；
Fig. 6 is air conditioning cooling water system control device schematic diagram provided in an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts All other embodiment, shall fall within the protection scope of the present invention.
The embodiment of the present invention is described in further detail with reference to the accompanying drawings of the specification.
As shown in figure 3, being air conditioning cooling water system control method schematic diagram provided in an embodiment of the present invention, comprising:
Step 301, the current cooling water return water temperature for obtaining air conditioning cooling water system and determining current outdoor wet-bulb temperature；
If the temperature difference of step 302, the current cooling water return water temperature and the current outdoor wet-bulb temperature is greater than first Temperature difference threshold, and there are the cooling towers that at least one is not opened, then according to preset optimization, open the first cooling tower, institute Stating the first cooling tower is the highest cooling of cooling efficiency in the cooling tower for be in the preset optimization non-open state Tower, the preset optimization are ranked up according to the cooling efficiency of all cooling towers；
Step 303, after setting duration, back to obtaining current cooling water return water temperature and determine current outdoor wet bulb temperature The step of spending.
It is air conditioning cooling water system architecture diagram in central air conditioner system in the prior art, wherein wrapping as shown in Fig. 2 (a) Containing host, a cooling tower group includes in each cooling tower wherein the cooling tower group includes one or more cooling towers At least one blower can be used for cooling down to the cooling water flowed through, therefore cooling tower is beaten when the blower in cooling tower is opened The quantity for opening (blower i.e. in opening cooling tower) is more, then the return water temperature of cooling water can be lower, conversely, under normal circumstances, The quantity that cooling tower is opened is fewer, then the return water temperature of cooling water can be higher, cold certainly it could also be possible that reducing cooling tower quantity But the return water temperature of water remains unchanged.In Fig. 2 (a), illustratively give comprising 3 cooling towers in cooling tower group, for example, point Not Wei cooling tower 1, cooling tower 2, cooling tower 3.
It should be noted that Fig. 2 (a) is merely given as the cooling tower quantity that cooling tower group in air conditioning cooling water system includes One example, in practical application, the cooling tower for including in cooling tower group can be any amount.
In above-mentioned steps 301, obtains current cooling water return water temperature and determine current outdoor wet-bulb temperature.Wherein, cooling Water return water temperature refers to that cooling water is flowed out from host, and the temperature of host is flowed back to after the cooling of cooling tower；And outdoor wet bulb Temperature can be calculated by the temperature and humidity got.
In above-mentioned steps 302, the temperature difference of the current cooling water return water temperature and the current outdoor wet-bulb temperature is calculated, And judge whether the current cooling water return water temperature and the temperature difference of the current outdoor wet-bulb temperature are greater than the first temperature difference threshold, Wherein, the first temperature difference threshold is preset according to actual needs, such as one for being generally set as between 3 DEG C~4 DEG C Numerical value.
If the temperature difference of the current cooling water return water temperature and the current outdoor wet-bulb temperature is greater than the first temperature difference threshold, Show that current cooling water return water temperature is higher, it is therefore desirable to increase the unlatching quantity of cooling tower, increasing reduces cooling water return water temperature The rate of degree achievees the purpose that further decrease cooling water return water temperature.
Specifically, cooling tower that judgement is not opened with the presence or absence of at least one currently is first had to, for example, referring to Fig. 2 (a), Wherein one 3 cooling towers are shared, if 3 cooling towers have at least one cooling tower to be in non-open state, is not opened from all One is selected in the cooling tower opened and is opened, specifically therefrom selecting the first cooling tower according to preset optimization and opening It opens, wherein first cooling tower is that cooling efficiency in the cooling tower of non-open state is in the preset optimization Highest cooling tower, the preset optimization are ranked up according to the cooling efficiency of all cooling towers.
For example, or by taking Fig. 2 (a) as an example, corresponding optimization table is referring to table 1.
Cooling tower identification Cooling efficiency State
3 4.6 It opens
2 4.4 It closes
1 3.9 It closes
1 optimization table of table
In above-mentioned table 1, there are two types of states, i.e. open state and closed state for cooling tower (in the embodiment of the present invention also referred to as Non- open state).
Above-mentioned optimization be ranked up from high to low according to the cooling efficiency of all cooling towers (can certainly be It is ranked up from low to high), therefore according to the optimization in table 1, when needing that a cooling tower is therefrom selected to be opened, It is directly searched from top to bottom, finds first cooling tower being in close state, and it is opened, it is current cold in table 1 But efficiency highest and the cooling tower being in close state are cooling tower 2, therefore cooling tower 2 is opened, and also needs to current Optimization is updated, i.e., is " unlatching " by the status modifier of cooling tower 1 in table 1.
In above-mentioned steps 303, after cooling tower 1 opens operation setting duration, step 301 is returned to, that is, continues to obtain empty It adjusts the current cooling water return water temperature of cooling water system and determines current outdoor wet-bulb temperature, form a cycle detection.
Here, operation setting duration why is opened, is to guarantee that the cooling tower just opened can enter normal work Make state, there is apparent cooling effect and then return step 301, can to avoid obtain current cooling water return water temperature when go out Existing temperature change is unobvious and forms false judgment.
After returning to step 301, and get current cooling water return water temperature and the determination of air conditioning cooling water system Current outdoor wet-bulb temperature, wherein generally variation is little in one section of duration for current outdoor wet-bulb temperature, at this point, due to just opening The cooling tower opened plays cooling effect, therefore the temperature difference meeting of current cooling water return water temperature and the current outdoor wet-bulb temperature Reduce, if it is the first temperature difference threshold is not more than after reducing, then shows that the cooling tower currently opened has had reached cooling mesh 's；If it is the first temperature difference threshold is also greater than after reducing, then show still to be unable to reach after currently starting a cooling tower The cooling effect needed, it is therefore desirable to which further reselection one cooling tower in non-open state is opened, and is selected The method selected also or from selection one in optimization is in the highest cooling of cooling efficiency in the cooling tower of non-open state Tower, details are not described herein again.
Therefore, it by the above method, may be implemented when needing to open cooling tower, selected from all cooling towers that do not open The highest cooling tower of cooling efficiency is selected to be opened, so as to improve cooling efficiency, compared to the prior art in it is random The method for opening cooling tower, may be implemented only to need to open less cooling tower can reach the cooling effect of needs, thus Cooling efficiency can be improved, save system resource.
Correspondingly, after obtaining current cooling water return water temperature and determining current outdoor wet-bulb temperature, if described work as The temperature difference of preceding cooling water return water temperature and the current outdoor wet-bulb temperature then shows current cooling water less than the second temperature difference threshold Return water temperature is relatively low, needs to reduce the unlatching quantity of cooling tower at this time, reduces the rate for reducing cooling water return water temperature, reaches and mention The purpose of high current cooling water return water temperature.Wherein, the second temperature difference threshold is less than the first temperature difference threshold, such as can generally set A numerical value being set between 3 DEG C~4 DEG C, for example, the first temperature difference threshold is set as 4 DEG C, and the second temperature difference threshold is set as 3 ℃。
Specifically, the cooling tower currently having turned on the presence or absence of at least one is first determined whether, for example, referring to Fig. 2 (a), In one share 3 cooling towers, if 3 cooling towers have at least one cooling tower in the open state, from the cold of all unlatchings But one is selected in tower and is closed, specifically therefrom select the second cooling tower according to preset optimization and open, In, second cooling tower is minimum for cooling efficiency in the cooling tower in the state that has turned in the preset optimization Cooling tower.
Referring to table 1, it is assumed that table 1 recorded is the current state of all cooling towers, then when needing to select one second cooling When tower is closed, filling is opened due to only having cooling tower 3 to be in, the second cooling tower selected is cooling tower 3, thus cold But tower 3 is the cooling tower that efficiency of cooling tower is minimum in cooling tower in the open state.
Herein, when closing cooling tower, why need that the minimum cooling tower of cooling efficiency is selected to be closed, It is to shake effect in order to prevent, because if the higher cooling tower of cooling efficiency has been selected to be closed, it is possible to can lead It causes current cooling water return water temperature and the temperature difference of current outdoor wet-bulb temperature to be greater than the first temperature difference threshold again, then needs to open again One cooling tower causes to waste system resource to be formed among closed-open-closed-open circulation.
Therefore, the method provided through the embodiment of the present invention may be implemented therefrom to select one when needing to close cooling tower The minimum cooling tower of a cooling efficiency is closed, and on the one hand the cooling effect of available needs, on the other hand can also prevent Efficiency is only shaken, system resource can be saved.
Similarly, after closing cooling tower, after needing to wait setting duration, back to the current cooling water return water temperature of acquisition The step of degree and determining current outdoor wet-bulb temperature, continue to keep to current cooling water return water temperature and current outdoor wet-bulb temperature Monitoring.
Detailed description is provided to the determination method of the optimization in the embodiment of the present invention below.The embodiment of the present invention In, air conditioning cooling water system includes a cooling tower group, and the cooling tower group includes at least one cooling tower, optionally, according to Following manner determines the preset optimization:
According to K group leaving water temperature data and least square method, the cooling effect of each cooling tower in the cooling tower group is determined Rate, every group of leaving water temperature data in the K group leaving water temperature data include that all cooling towers in the cooling tower group are all opened The leaving water temperature of the leaving water temperature of each cooling tower when opening and the cooling tower group, K are greater than or equal to N, and N is the cooling tower The quantity of cooling tower in group；
According to the cooling efficiency of each cooling tower in the cooling tower group, the preset optimization is determined.
For example, referring to Fig. 2 (a), wherein include a cooling tower group, it is cold to calculate 3 in cooling tower group below But it is illustrated for the efficiency of cooling tower of tower.
It wherein include 3 cooling towers, respectively cooling tower 1, cooling tower 2, cooling tower 3.Then it adopts respectively K is different Sample time point gets K group leaving water temperature data, wherein including 4 data, respectively cooling tower in every group of leaving water temperature data 1 leaving water temperature, the leaving water temperature of cooling tower 2, the leaving water temperature of cooling tower 3 and the leaving water temperature of cooling tower group.Wherein K More than or equal to 3.
Assuming that K value is 8,8 groups of leaving water temperature data of the cooling tower group finally got are respectively as follows:
1st group: (a11, a12, a13, b1)；
2nd group: (a21, a22, a23, b2)；
3rd group: (a31, a32, a33, b3)；
4th group: (a41, a42, a43, b4)；
5th group: (a51, a52, a53, b5)；
6th group: (a61, a62, a63, b6)；
7th group: (a71, a72, a73, b7)；
8th group: (a81, a82, a83, b8)。
Wherein, aijIndicate the leaving water temperature of j-th of cooling tower in i-th group of leaving water temperature data, biIndicate that i-th group goes out water temperature Cooling tower group leaving water temperature of the degree in, 1≤i≤8,1≤j≤3.
Assuming that the cooling tower 1 in cooling tower group, cooling tower 2, the cooling efficiency of cooling tower 3 is respectively x, y, z, can group At an equation group, least square method is then utilized, acquires x, the value of y, z is to get arriving cooling tower 1, cooling tower 2, cooling tower 3 Cooling efficiency.
Such as: obtained equation group is as follows:
Wherein, include 8 equations, only 3 unknown numbers, actually main wherein any 3 equations can in the hope of x, The value of y, z, it is contemplated that in order not to be influenced by the data obtained, therefore more multiple groups leaving water temperature data is selected then to form Equation group, and least square method is utilized, it can be in the hope of more accurate x, the value of y, z.
For cooling tower group, obtained x, y, the value of z can be used to indicate that cooling tower 1, cooling tower 2, the cooling of cooling tower 3 Size relation between efficiency.Therefore it after the cooling efficiency for obtaining all cooling towers, is ranked up according to cooling efficiency, i.e., Above-mentioned optimization can be obtained.
As an example it is assumed that obtained x, y, z value is respectively 4.5,5.8,6.3, then show cooling tower cooling tower from height to It is low successively are as follows: cooling tower 3, cooling tower 2, cooling tower 1.
It should be noted that the x acquired here, y, z value are not offered as the efficiency of cooling tower of corresponding cooling tower, and it is Indicate the relative size relationship between cooling tower cooling efficiency.
The above method in use, can quickly determine current cooling by presetting an optimization Efficiency highest or minimum cooling tower, so as to improve the whole efficiency for opening or closing cooling tower.
In addition, including blower in each cooling tower in practical applications, the quantity of blower can be one or more It is a, also, each cooling tower can have corresponding valve, can also be each cold without corresponding valve, as shown in Fig. 2 (a) But tower does not have the air conditioning cooling water system schematic diagram of corresponding valve, and the central air conditioner system if Fig. 2 (b) is the prior art is hollow Cooling water system architecture diagram is adjusted, wherein each cooling tower has a corresponding valve, the quantity of valve can be one or more, one As in the case of, only one.
When each cooling tower has corresponding valve, then the corresponding relationship of the open and close of cooling tower and valve have with Under it is several:
One, cooling tower is closed, and corresponding valve is closed
Under the situation, show current pipe path be it is obstructed, without cooling water from this access circulate, that is to say, that As long as being closed when the corresponding valve of cooling tower, cooling tower be close start to open will not all play the role of it is any but practical In, as long as valve is closed, in order to save system resource, general cooling tower is also intended to closing.
Two, cooling tower is closed, corresponding valve opening
Under the situation, cooling tower is closed, corresponding valve opening, then this is by being intended only as the circulation of a cooling water Access, but since cooling tower is closed, any cooling effect is not had.
Three, cooling tower is opened, corresponding valve opening
Under the situation, since cooling tower is to open, it can cool down to the cooling water flowed through.
Below for two kinds of air conditioning cooling water systems in the prior art, illustrate the embodiment party of the embodiment of the present invention respectively Method.
One, each cooling tower in air conditioning cooling water system is without corresponding valve
The temperature difference of situation 1, current cooling water return water temperature and the current outdoor wet-bulb temperature is greater than the first temperature difference threshold
At least one cooling tower that do not open if it exists opens the first cooling tower, specifically then according to preset optimization Ground opens the first cooling tower and refers to opening all blowers in cooling tower.
The temperature difference of situation 2, current cooling water return water temperature and the current outdoor wet-bulb temperature is less than the second temperature difference threshold
It is cooling to close second then according to the preset optimization at least one cooling tower having been switched on if it exists Tower specifically closes the second cooling tower and refers to all blowers closed in the second cooling tower.
Two, each cooling tower in air conditioning cooling water system has corresponding valve
The temperature difference of situation 1, current cooling water return water temperature and the current outdoor wet-bulb temperature is greater than the first temperature difference threshold
At least one cooling tower that do not open if it exists then determines the first cooling tower according to preset optimization, and And judge whether the corresponding valve of the first cooling tower is in close state, if be in close state, first open described first The corresponding valve of cooling tower；Then it is then turned on the blower that first cooling tower includes.
The temperature difference of situation 2, current cooling water return water temperature and the current outdoor wet-bulb temperature is less than the second temperature difference threshold
At least one cooling tower having turned on if it exists, then determine the second cooling tower according to preset optimization, then It is first shut off the corresponding blower of second cooling tower.
Next it needs to judge whether to need to close valve, because having been switched off a cooling tower, improves cooling water return water The purpose of temperature has reached, but whether needs to close a valve, then also needs further to judge, specifically, first from A target valve is found in current air conditioning cooling water system, the target valve is to be in open in the air conditioning cooling water system It opens state and corresponding cooling tower is in the valve of non-open state, for example, Fig. 2 (b) is referred to, if cooling tower 1~cooling The corresponding valve of tower 3 is all in the open state, and cooling tower 1 is in the open state, and the corresponding valve of cooling tower 1 is in and opens Open state；Cooling tower 2 is in close state, and the corresponding valve of cooling tower 2 is in the open state；Cooling tower 3 is in close state, The corresponding valve of cooling tower 3 is in the open state, then target valve is the corresponding valve of cooling tower 2 and the corresponding valve of cooling tower 3 Door.
Whether the metered flow after then needing to judge to close target valve is not less than target flow, however, it is determined that closes Metered flow after the target valve is not less than the target flow, then closes the target valve.
As an example it is assumed that the target valve determined is the corresponding valve of cooling tower 2 and the corresponding valve of cooling tower 3, vacation If will lead to metered flow after closing the corresponding valve of cooling tower 2 less than target flow, then the corresponding valve of cooling tower 2 cannot be closed Door；If not will lead to metered flow after closing the corresponding valve of cooling tower 3 less than target flow, cooling tower 3 can be closed Corresponding valve.Why select while closing a cooling tower, it is also contemplated that whether can close a valve, be to consider The cooling tower having into current air conditioning cooling water system has been switched off, then the corresponding pipeline of the cooling tower having been switched off is just only It is used as a traffic channel, and possible current nominal flow has been far longer than target flow in practice, therefore Close portion sub-valve can be considered, to reduce metered flow under the premise of guaranteeing does not influence normal work, play saving system The purpose of the system energy.
Specifically, wherein current nominal flow is can be calculated according to the metered flow of each cooling tower；And For target flow, optionally, the target flow is determined according to following method:
Step 1, the current cooling water leaving water temperature for obtaining the air conditioning cooling water system, the current cooling water return water temperature Degree and cooling load；
Step 2, judge the current cooling water leaving water temperature and the current cooling water return water temperature the temperature difference whether In preset range, if so, going to step 3, step 4 is otherwise gone to；
Step 3, according to the temperature difference of the current cooling water leaving water temperature and the current cooling water return water temperature and described Cooling load, determines the target flow；
Step 4, according to the cooling load and the preset temperature difference, determine the target flow.
As an example it is assumed that preset range is 4 DEG C~5 DEG C, it is assumed that the current cooling load got is C, current cooling The temperature difference of water leaving water temperature and the current cooling water return water temperature shows that current cooling water goes out then if 4≤L≤5 for L The temperature difference of coolant-temperature gage and the current cooling water return water temperature within a preset range, then calculates target stream according to following formula Measure Q:Q=C/L* coefficient；If L>5 or L<4, show that current cooling water leaving water temperature and the current cooling water return The temperature difference of coolant-temperature gage within a preset range, does not then calculate target flow Q:Q=C/ preset difference value * system according to following formula Number, wherein preset difference value is a preset value, some value being generally chosen in the preset range, such as when default When range is 4 DEG C~5 DEG C, preset difference value can be chosen for 4 or 5 etc..
Method provided in an embodiment of the present invention obtains the current cold of air conditioning cooling water system in air conditioning cooling water system But water return water temperature and determining current outdoor wet-bulb temperature；If the current cooling water return water temperature and the current outdoor wet bulb The temperature difference of temperature is greater than the first temperature difference threshold, and there are the cooling towers that at least one is not opened, then according to preset optimization, The first cooling tower is opened, first cooling tower is to be in cold in the cooling tower of non-open state in the preset optimization But the highest cooling tower of efficiency, the preset optimization are ranked up according to the cooling efficiency of all cooling towers；So Afterwards after setting duration, back to the step of obtaining current cooling water return water temperature and determining current outdoor wet-bulb temperature.The party Method realizes in air conditioning cooling water system, is that one is chosen according to preset optimization not when needing to open cooling tower The highest cooling tower of the cooling efficiency of unlatching, and open the cooling tower, thereby may be ensured that fast implement quickly reduce it is cold But water return water temperature, improves cooling efficiency, and when opening cooling tower according to the strategy, it is ensured that opens less cooling Tower can achieve the purpose that default control condition, so as to save system resource.
Air conditioning cooling water system control method provided in an embodiment of the present invention is described in detail below, referring to Fig. 4, for sky Air conditioning cooling water system control method flow chart of each cooling tower of cooling water system without corresponding valve when is adjusted, it is specific to wrap It includes:
Step 401, the current cooling water return water temperature for obtaining air conditioning cooling water system and determining current outdoor wet-bulb temperature；
Step 402 judges whether the temperature difference of the current cooling water return water temperature and the current outdoor wet-bulb temperature is big In the first temperature difference threshold, if so, going to step 403, step 405 is otherwise gone to；
It is cold to open first then according to preset optimization for step 403, if it exists at least one cooling tower that do not open But the blower that tower includes；
Wherein, first cooling tower is cooling in the cooling tower in the preset optimization in non-open state The highest cooling tower of efficiency, the preset optimization are ranked up according to the cooling efficiency of all cooling towers.
Step 404 after waiting setting duration, is back to step 401；
Step 405 judges whether the temperature difference of current cooling water return water temperature and current outdoor wet-bulb temperature is warm less than second Poor threshold value, if then going to step 406, if it is not, then terminating；
Wherein, the second temperature difference threshold is less than the first temperature difference threshold.
If the temperature difference of current cooling water return water temperature and current outdoor wet-bulb temperature is not less than the second temperature difference threshold, show The temperature difference of current cooling water return water temperature and current outdoor wet-bulb temperature is between the second temperature difference threshold and the first temperature difference threshold , illustrate that cooling tower group is in relatively better working condition, should at this time stop the implementation of the method for the present invention, that is, be transferred to knot Then beam can keep this state 15~30 minutes or so, then restart the method for the embodiment of the present invention, i.e., from step 401 start to re-start monitoring and detect whether to need to open or close cooling tower.
Step 406, if it exists at least one cooling tower having been switched on are closed then according to the preset optimization Second cooling tower.
Wherein, second cooling tower is cooling in the cooling tower in the state that has turned in the preset optimization The minimum cooling tower of efficiency.
Method provided in an embodiment of the present invention obtains the current cold of air conditioning cooling water system in air conditioning cooling water system But water return water temperature and determining current outdoor wet-bulb temperature；If the current cooling water return water temperature and the current outdoor wet bulb The temperature difference of temperature is greater than the first temperature difference threshold, and there are the cooling towers that at least one is not opened, then according to preset optimization, The first cooling tower is opened, first cooling tower is to be in cold in the cooling tower of non-open state in the preset optimization But the highest cooling tower of efficiency, the preset optimization are ranked up according to the cooling efficiency of all cooling towers；So Afterwards after setting duration, back to the step of obtaining current cooling water return water temperature and determining current outdoor wet-bulb temperature.The party Method realizes in air conditioning cooling water system, is that one is chosen according to preset optimization not when needing to open cooling tower The highest cooling tower of the cooling efficiency of unlatching, and open the cooling tower, thereby may be ensured that fast implement quickly reduce it is cold But water return water temperature, improves cooling efficiency, and when opening cooling tower according to the strategy, it is ensured that opens less cooling Tower can achieve the purpose that default control condition, so as to save system resource.
Air conditioning cooling water system control method provided in an embodiment of the present invention is described in detail below, referring to Fig. 5, for sky Air conditioning cooling water system control method flow chart when each cooling tower of cooling water system being adjusted to have corresponding valve is specific to wrap It includes:
Step 501, the current cooling water return water temperature for obtaining air conditioning cooling water system and determining current outdoor wet-bulb temperature；
Step 502 judges whether the temperature difference of the current cooling water return water temperature and the current outdoor wet-bulb temperature is big In the first temperature difference threshold, if so, going to step 503, step 507 is otherwise gone to；
Step 503, if it exists at least one cooling tower that do not open determine first then according to preset optimization Cooling tower；
Wherein, first cooling tower is cooling in the cooling tower in the preset optimization in non-open state The highest cooling tower of efficiency, the preset optimization are ranked up according to the cooling efficiency of all cooling towers.
If step 504, the corresponding valve of the first cooling tower are in close state, the valve is opened；
Step 505 opens the blower that first cooling tower includes；
Step 506 after waiting setting duration, returns to step 501；
Step 507 judges whether the temperature difference of current cooling water return water temperature and current outdoor wet-bulb temperature is warm less than second Poor threshold value, if then going to step 508, if it is not, then terminating；
Wherein, the second temperature difference threshold is less than the first temperature difference threshold.
If the temperature difference of current cooling water return water temperature and current outdoor wet-bulb temperature is not less than the second temperature difference threshold, show The temperature difference of current cooling water return water temperature and current outdoor wet-bulb temperature is between the second temperature difference threshold and the first temperature difference threshold , illustrate that cooling tower group is in relatively better working condition, should at this time stop the implementation of the method for the present invention, that is, be transferred to knot Then beam can keep this state 15~30 minutes or so, then restart the method for the embodiment of the present invention, i.e., from step 501 start to re-start monitoring and detect whether to need to open or close cooling tower.
Step 508, if it exists at least one cooling tower having been switched on determine then according to the preset optimization The second cooling tower and close the blower that second cooling tower includes out；
Wherein, second cooling tower is cooling in the cooling tower in the state that has turned in the preset optimization The minimum cooling tower of efficiency.
Step 509 judges whether the metered flow after closing target valve is not less than target flow, if then going to step 510, if it is not, then going to step 506；
The target valve is in for cooling tower in the open state and corresponding in the air conditioning cooling water system and does not open Open the valve of state.
Step 510 closes the target valve.
Method provided in an embodiment of the present invention obtains the current cold of air conditioning cooling water system in air conditioning cooling water system But water return water temperature and determining current outdoor wet-bulb temperature；If the current cooling water return water temperature and the current outdoor wet bulb The temperature difference of temperature is greater than the first temperature difference threshold, and there are the cooling towers that at least one is not opened, then according to preset optimization, The first cooling tower is opened, first cooling tower is to be in cold in the cooling tower of non-open state in the preset optimization But the highest cooling tower of efficiency, the preset optimization are ranked up according to the cooling efficiency of all cooling towers；So Afterwards after setting duration, back to the step of obtaining current cooling water return water temperature and determining current outdoor wet-bulb temperature.The party Method realizes in air conditioning cooling water system, is that one is chosen according to preset optimization not when needing to open cooling tower The highest cooling tower of the cooling efficiency of unlatching, and open the cooling tower, thereby may be ensured that fast implement quickly reduce it is cold But water return water temperature, improves cooling efficiency, and when opening cooling tower according to the strategy, it is ensured that opens less cooling Tower can achieve the purpose that default control condition, so as to save system resource.
Based on the same technical idea, the embodiment of the present invention also provides a kind of air conditioning cooling water system control device, such as Fig. 6 It is shown, comprising:
Acquiring unit 601, for obtaining the current cooling water return water temperature of air conditioning cooling water system and determining current outdoor Wet-bulb temperature；
Opening unit 602, if the temperature difference for the current cooling water return water temperature and the current outdoor wet-bulb temperature Greater than the first temperature difference threshold, and there are the cooling towers that at least one is not opened, then according to preset optimization, it is cold to open first But tower, first cooling tower are that cooling efficiency highest in the cooling tower of non-open state is in the preset optimization Cooling tower, the preset optimization is ranked up according to the cooling efficiency of all cooling towers；
Timing unit 603, for working as cup back to the current cooling water return water temperature of acquisition and determination after setting duration The step of outer wet-bulb temperature.
Optionally, the air conditioning cooling water system control device further includes closing unit 604, is used for:
If the temperature difference of the current cooling water return water temperature and the current outdoor wet-bulb temperature less than the second temperature difference threshold, And there are the cooling towers that at least one has been switched on, then according to the preset optimization, close the second cooling tower, described the Two cooling towers are that the cooling tower that cooling efficiency is minimum in the cooling tower for the state that has turned on, institute are in the preset optimization The second temperature difference threshold is stated less than first temperature difference threshold；
The timing unit 603, is also used to: after setting duration, back to the current cooling water return water temperature of acquisition and really Outside settled cup the step of wet-bulb temperature.
Optionally, the air conditioning cooling water system includes a cooling tower group, and the cooling tower group includes that at least one is cold But tower；
The air conditioning cooling water system control device further includes optimization determination unit 605, for according to following manner Determine the preset optimization:
According to K group leaving water temperature data and least square method, the cooling effect of each cooling tower in the cooling tower group is determined Rate, every group of leaving water temperature data in the K group leaving water temperature data include that all cooling towers in the cooling tower group are all opened The leaving water temperature of the leaving water temperature of each cooling tower when opening and the cooling tower group, K are greater than or equal to N, and N is the cooling tower The quantity of cooling tower in group；
According to the cooling efficiency of each cooling tower in the cooling tower group, the preset optimization is determined.
Optionally, each cooling tower in the air conditioning cooling water system has corresponding valve, and each cooling tower packet Containing blower, the valve is used to control the flow of cooling tower；The opening unit 602 is also used to: if first cooling tower pair The valve answered is in close state, then opens the corresponding valve of first cooling tower；And open the first cooling tower packet The blower contained.
Optionally, each cooling tower in the air conditioning cooling water system has corresponding valve, and each cooling tower packet Containing blower, the valve is used to control the flow of cooling tower；The closing unit 604, is specifically used for: it is cooling to close described second The corresponding blower of tower；And judge whether the metered flow after closing target valve is not less than target flow, the target valve The valve of non-open state is in for cooling tower in the open state and corresponding in the air conditioning cooling water system；If it is determined that closing Metered flow after closing the target valve is not less than the target flow, then closes the target valve.
Optionally, the air conditioning cooling water system control device further includes flow determination unit 606, for according to following side Method determines the target flow:
Obtain the current cooling water leaving water temperature of the air conditioning cooling water system, the current cooling water return water temperature and cold But load；
If it is determined that the temperature difference of the current cooling water leaving water temperature and the current cooling water return water temperature is in preset range It is interior, then according to the temperature difference of the current cooling water leaving water temperature and the current cooling water return water temperature and the cooling load, Determine the target flow；
If it is determined that the temperature difference of the current cooling water leaving water temperature and the current cooling water return water temperature is not described pre- If in range, then according to the cooling load, determining the target flow.
The embodiment of the present invention obtains the current cooling water return water temperature of air conditioning cooling water system in air conditioning cooling water system Degree and determining current outdoor wet-bulb temperature；If the temperature difference of the current cooling water return water temperature and the current outdoor wet-bulb temperature Greater than the first temperature difference threshold, and there are the cooling towers that at least one is not opened, then according to preset optimization, it is cold to open first But tower, first cooling tower are that cooling efficiency highest in the cooling tower of non-open state is in the preset optimization Cooling tower, the preset optimization is ranked up according to the cooling efficiency of all cooling towers；Then in setting After length, back to the step of obtaining current cooling water return water temperature and determining current outdoor wet-bulb temperature.The embodiment of the present invention is real Show in air conditioning cooling water system, has been to choose one according to preset optimization not open when needing to open cooling tower The highest cooling tower of cooling efficiency, and open the cooling tower, thereby may be ensured that fast implement quickly reduces cooling water Return water temperature, improves cooling efficiency, and when opening cooling tower according to the strategy, it is ensured that opens less cooling tower just It can achieve the purpose of default control condition, so as to save system resource.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic Property concept, then additional changes and modifications can be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims (12)

1. a kind of air conditioning cooling water system control method characterized by comprising
It obtains the current cooling water return water temperature of air conditioning cooling water system and determines current outdoor wet-bulb temperature；
If the temperature difference of the current cooling water return water temperature and the current outdoor wet-bulb temperature is greater than the first temperature difference threshold, and deposits In the cooling tower that at least one is not opened, then according to preset optimization, the first cooling tower is opened, first cooling tower is The highest cooling tower of cooling efficiency in cooling tower in the preset optimization in non-open state, it is described preset excellent Changing sequence is ranked up according to the cooling efficiency of all cooling towers；
After setting duration, back to the step of obtaining current cooling water return water temperature and determining current outdoor wet-bulb temperature.
2. air conditioning cooling water system control method as described in claim 1, which is characterized in that described to obtain current cooling water time After coolant-temperature gage and determining current outdoor wet-bulb temperature, further includes:
If the temperature difference of the current cooling water return water temperature and the current outdoor wet-bulb temperature is deposited less than the second temperature difference threshold In the cooling tower that at least one has been switched on, then according to the preset optimization, the second cooling tower is closed, described second is cold But tower is in the preset optimization in having turned on the cooling tower that cooling efficiency is minimum in the cooling tower of state, described the Two temperature difference thresholds are less than first temperature difference threshold；
After setting duration, back to the step of obtaining current cooling water return water temperature and determining current outdoor wet-bulb temperature.
3. air conditioning cooling water system control method as claimed in claim 1 or 2, which is characterized in that the air conditioning cooling water system System includes a cooling tower group, and the cooling tower group includes at least one cooling tower；
The preset optimization is determined according to following manner:
According to K group leaving water temperature data and least square method, the cooling efficiency of each cooling tower in the cooling tower group, institute are determined Stating every group of leaving water temperature data in K group leaving water temperature data includes when all cooling towers in the cooling tower group are switched on The leaving water temperature of the leaving water temperature of each cooling tower and the cooling tower group, K are greater than or equal to N, and N is cold in the cooling tower group But the quantity of tower；
According to the cooling efficiency of each cooling tower in the cooling tower group, the preset optimization is determined.
4. air conditioning cooling water system control method as described in claim 1, which is characterized in that in the air conditioning cooling water system Each cooling tower there is corresponding valve, and each cooling tower includes blower, and the valve is used to control the flow of cooling tower； Before the first cooling tower of the unlatching, further includes:
If the corresponding valve of first cooling tower is in close state, the corresponding valve of first cooling tower is opened；
The first cooling tower of the unlatching, comprising:
Open the blower that first cooling tower includes.
5. air conditioning cooling water system control method as claimed in claim 2, which is characterized in that in the air conditioning cooling water system Each cooling tower there is corresponding valve, and each cooling tower includes blower, and the valve is used to control the flow of cooling tower； The second cooling tower of the closing, comprising:
Close the corresponding blower of second cooling tower；
It closes after the corresponding blower of second cooling tower, further includes:
Whether the metered flow after judging closing target valve is not less than target flow, and the target valve is that the air-conditioning is cooling In the open state and corresponding cooling tower is in the valve of non-open state in water system；
If it is determined that closing the metered flow after the target valve not less than the target flow, then the target valve is closed.
6. air conditioning cooling water system control method as claimed in claim 5, which is characterized in that according to the determination of following method Target flow:
The current cooling water leaving water temperature, the current cooling water return water temperature and cooling for obtaining the air conditioning cooling water system are negative Lotus；
If it is determined that the temperature difference of the current cooling water leaving water temperature and the current cooling water return water temperature is within a preset range, then According to the temperature difference and the cooling load of the current cooling water leaving water temperature and the current cooling water return water temperature, institute is determined State target flow；
If it is determined that the temperature difference of the current cooling water leaving water temperature and the current cooling water return water temperature is not in the default model In enclosing, then according to the cooling load, the target flow is determined.
7. a kind of air conditioning cooling water system control device characterized by comprising
Acquiring unit, for obtaining the current cooling water return water temperature of air conditioning cooling water system and determining current outdoor wet bulb temperature Degree；
Opening unit, if being greater than first for the temperature difference of the current cooling water return water temperature and the current outdoor wet-bulb temperature Temperature difference threshold, and there are the cooling towers that at least one is not opened, then according to preset optimization, open the first cooling tower, institute Stating the first cooling tower is the highest cooling of cooling efficiency in the cooling tower for be in the preset optimization non-open state Tower, the preset optimization are ranked up according to the cooling efficiency of all cooling towers；
Timing unit, for back to the current cooling water return water temperature of acquisition and determining current outdoor wet bulb after setting duration The step of temperature.
8. air conditioning cooling water system control device as claimed in claim 7, which is characterized in that the air conditioning cooling water system control Device processed further includes closing unit, is used for:
If the temperature difference of the current cooling water return water temperature and the current outdoor wet-bulb temperature is deposited less than the second temperature difference threshold In the cooling tower that at least one has been switched on, then according to the preset optimization, the second cooling tower is closed, described second is cold But tower is in the preset optimization in having turned on the cooling tower that cooling efficiency is minimum in the cooling tower of state, described the Two temperature difference thresholds are less than first temperature difference threshold；
The timing unit, is also used to: after setting duration, working as cup back to the current cooling water return water temperature of acquisition and determination The step of outer wet-bulb temperature.
9. air conditioning cooling water system control device as claimed in claim 7 or 8, which is characterized in that the air conditioning cooling water system System includes a cooling tower group, and the cooling tower group includes at least one cooling tower；
The air conditioning cooling water system control device further includes optimization determination unit, for according to following manner determination Preset optimization:
According to K group leaving water temperature data and least square method, the cooling efficiency of each cooling tower in the cooling tower group, institute are determined Stating every group of leaving water temperature data in K group leaving water temperature data includes when all cooling towers in the cooling tower group are switched on The leaving water temperature of the leaving water temperature of each cooling tower and the cooling tower group, K are greater than or equal to N, and N is cold in the cooling tower group But the quantity of tower；
According to the cooling efficiency of each cooling tower in the cooling tower group, the preset optimization is determined.
10. air conditioning cooling water system control device as claimed in claim 7, which is characterized in that the air conditioning cooling water system In each cooling tower there is corresponding valve, and each cooling tower includes blower, and the valve is used to control the stream of cooling tower Amount；The opening unit is also used to: if the corresponding valve of first cooling tower is in close state, it is cold to open described first But the corresponding valve of tower；And open the blower that first cooling tower includes.
11. air conditioning cooling water system control device as claimed in claim 8, which is characterized in that the air conditioning cooling water system In each cooling tower there is corresponding valve, and each cooling tower includes blower, and the valve is used to control the stream of cooling tower Amount；The closing unit, is specifically used for: closing the corresponding blower of second cooling tower；And after target valve is closed in judgement Metered flow whether be not less than target flow, the target valve be it is in the open state in the air conditioning cooling water system and Corresponding cooling tower is in the valve of non-open state；If it is determined that closing the metered flow after the target valve not less than described Target flow then closes the target valve.
12. air conditioning cooling water system control device as claimed in claim 11, which is characterized in that the air conditioning cooling water system Control device further includes flow determination unit, for determining the target flow according to following method:
The current cooling water leaving water temperature, the current cooling water return water temperature and cooling for obtaining the air conditioning cooling water system are negative Lotus；
If it is determined that the temperature difference of the current cooling water leaving water temperature and the current cooling water return water temperature is within a preset range, then According to the temperature difference and the cooling load of the current cooling water leaving water temperature and the current cooling water return water temperature, institute is determined State target flow；
If it is determined that the temperature difference of the current cooling water leaving water temperature and the current cooling water return water temperature is not in the default model In enclosing, then according to the cooling load, the target flow is determined.
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