CN106594996A - District water supply variable flow control system based on meteorological condition - Google Patents
District water supply variable flow control system based on meteorological condition Download PDFInfo
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- CN106594996A CN106594996A CN201611208361.0A CN201611208361A CN106594996A CN 106594996 A CN106594996 A CN 106594996A CN 201611208361 A CN201611208361 A CN 201611208361A CN 106594996 A CN106594996 A CN 106594996A
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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
- F24F11/62—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
- F24F11/30—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
- F24F11/70—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
- F24F2130/00—Control inputs relating to environmental factors not covered by group F24F2110/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2130/00—Control inputs relating to environmental factors not covered by group F24F2110/00
- F24F2130/10—Weather information or forecasts
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a district water supply variable flow control system based on a meteorological condition and relates to the technical field of air conditioners. According to the district water supply variable flow control system, the problem that the adoption of a traditional control system cannot meet the requirements of the economy or comfort level of energy using aiming at the big system district water supply of the air-conditioner is solved. The district water supply variable flow control system provided by the embodiment of the invention comprises an environment temperature loading rate calculator, an environment humidity loading rate calculator, a temperature difference setting device, a water supplying and water returning temperature difference calculator, a water supplying and water returning temperature difference controller, a water supply pressure controller, an actuator and related measure and control instruments. The district water supply variable flow control system based on the meteorological condition is used for a central air conditioner system.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly to a kind of water rationing vari- able flow control system based on meteorological condition
System.
Background technology
Multiple branch's energy supply regions (i.e. subregion) can be divided by water supply branch road in the big system of air-conditioning, water rationing generally can lead to
Cross quenched, tune amount to realize, under using tune amount means, prior art generally according to for backwater differential pressure, supply backwater temperature difference to supply
Discharge is adjusted.However, because there is serious delayed, subregion room terminal temperature, temperature controller running status etc. in process
Information is not fully used, further perfect not enough for energy control function, easily cause excessive energy supply or
Person is the problem for being difficult to meet comfort level requirement.
The content of the invention
It is an object of the invention to provide a kind of water rationing vari- able flow control system based on meteorological condition, for solving
Supply water for the big system partitioning of air-conditioning, what the economy or comfort level for being difficult to satisfaction energy using traditional control system was required asks
Topic.
What the present invention was provided is applied to the big system of air-conditioning based on the water rationing vari- able flow control system of meteorological condition, wraps
Include：
Ambient temperature rate of load condensate computer, ambient temperature transmitter surveys ambient temperature as the ambient temperature rate of load condensate meter
The input of device is calculated, according to linearly or nonlinearly relation computing environment temperature load rate, as the ambient temperature rate of load condensate computer
Output；
Ambient humidity rate of load condensate computer, ambient humidity transmitter surveys ambient humidity as the ambient humidity rate of load condensate meter
The input of device is calculated, according to linearly or nonlinearly relation computing environment humidity rate of load condensate, as the ambient humidity rate of load condensate computer
Output；
Temperature difference setting apparatus, output and the ambient humidity rate of load condensate computer of the ambient temperature rate of load condensate computer
The input 1 and input 2 respectively as the temperature difference setting apparatus is exported, read group total is weighted to the input 1 and the input 2, obtained
To rate of load condensate, with the rate of load condensate as independent variable, temperature difference setting value is calculated according to linearly or nonlinearly relation, as the temperature difference
The output of setting apparatus；
The input 1 of supply backwater temperature difference computer, supply water temperature and return water temperature respectively as the supply backwater temperature difference computer
With input 2, used as supply backwater temperature difference, the supply backwater temperature difference is used as the supply backwater temperature difference meter for the difference of supply water temperature and return water temperature
Calculate the output of device；
Supply backwater temperature difference controller, the output of the temperature difference setting apparatus and the output of the supply backwater temperature difference computer are distinguished
Input 1 and input 2 as the supply backwater temperature difference controller, wherein, the output of the temperature difference setting apparatus is used as supply backwater temperature difference
The setting value of controller；The output of the supply backwater temperature difference computer as the supply backwater temperature difference controller measured value, the confession
Backwater temperature difference controller adopts pid control algorithm；The output obtained by the pid control algorithm is made through upper and lower amplitude limiting processing
For the output of supply backwater temperature difference controller；
Pressure of supply water controller, the output of the supply backwater temperature difference controller and measures the confession for obtaining to pressure of supply water
Water pressure measurement signal respectively as the pressure of supply water controller input 1 and input 2, wherein, the water supply differential temperature controller
Output as the pressure of supply water controller setting value, the pressure of supply water measurement signal is used as the pressure of supply water controller
Measured value, the pressure of supply water controller adopts pid control algorithm；And
Executor, used as the input of the executor, the executor adjusts correspondence point for the output of the pressure of supply water controller
The water supply flow in area.
Following beneficial effect is obtained in that according to the water rationing vari- able flow control system that the present invention is provided：
First, rational supply backwater temperature difference not only represents economy, and also comfort level is had an impact.The temperature difference is too small, system energy
Effect is low, conversely, be difficult to ensure that the requirement of comfort level, and water supply difference variation is slower, is control it unfavorable
Factor, supply backwater temperature difference controller of the present invention adopts cascade control system with pressure of supply water controller, can effectively overcome whole
The delayed big problem in loop, when air conditioner load changes, is reflected in quickly first the change of pressure of supply water, pressure of supply water controller
Can be adjusted automatically such that it is able to ensure that supply backwater temperature difference does not have too big fluctuation to a certain extent.
Also, on the basis of being automatically controlled according to load variations for pressure of return water, when supply backwater temperature difference changes,
Because its change is less, supply backwater temperature difference controller just can be adjusted using slower speed, and this just can adapt to
The characteristics of its is delayed big, supply backwater temperature difference controller output can automatically change the setting value of pressure of supply water controller, further real
The accurate adjustment of the existing temperature difference；
Additionally, the bound by arranging the output of supply backwater temperature difference controller, is equal to set pressure of supply water bound, energy
Enough ensure the reasonability of water rationing, it is to avoid the use in heating power least favorable loop can require that pressure of supply water is too low to cause waterpower to be lost
The maximum loop insufficient water of weighing apparatus, i.e. resistance.
Finally, compared to fixed supply backwater temperature difference set value calculation strategy, supply backwater temperature difference is changed more according to rate of load condensate
Rationally, under underload, because system has a least quantity to meet hydraulic equilibrium, cause supply backwater temperature difference less than normal, and with
The increase of load, it is allowed to which supply backwater temperature difference increases, therefore it is an advantage of the current invention that：The occasion of steady load indoors, can
According to outdoor temperature, the humidity reflection change of energy load, by temp.-differential control, economical operation is realized.
Description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, this
Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings：
The structural representation of the central air conditioner system that Fig. 1 is provided by the embodiment of the present invention.
The structured flowchart of the water rationing vari- able flow control system that Fig. 2 is provided by the embodiment of the present invention.
Specific embodiment
In order to further illustrate the water rationing vari- able flow control system based on meteorological condition provided in an embodiment of the present invention,
It is described in detail with reference to Figure of description.
As shown in figure 1, the embodiment of the present invention provides a kind of water rationing vari- able flow control system based on meteorological condition, its
It is applied in the air conditioning system shown in Fig. 1, it (is subregion 1～subregion m) in Fig. 1, each divides that the air conditioning system covers multiple subregions
Area includes that (each subregion includes 1～room of room n) in Fig. 1, and an air-conditioning, the air-conditioning are provided with each room in multiple rooms
Temperature controller is configured with, the temperature controller is used to be controlled the actual temperature in the room.
Corresponding each subregion is provided with variable frequency pump, and the variable frequency pump is used to control the water supply flow in correspondence subregion, in this enforcement
In example, arrange in subregion 1 in variable frequency pump P201, subregion m and variable frequency pump P202 is set.Cold season is being supplied, by handpiece Water Chilling Units to each point
Area supplies water, and provides cold into each subregion room whereby.By taking subregion 1 as an example, its supply water temperature is T1, and return water temperature is T2, is supplied
Hydraulic pressure is by force P.
As shown in Fig. 2 water rationing vari- able flow control system provided in an embodiment of the present invention includes ambient temperature rate of load condensate
Computer A, ambient humidity rate of load condensate computer B, temperature difference setting apparatus C, supply backwater temperature difference computer D, supply backwater temperature difference controller
E, pressure of supply water controller G, executor H and related measure and control instrument (not shown)；
With regard to above-mentioned ambient temperature rate of load condensate computer A, by ambient temperature transmitter (in above-mentioned related measure and control instrument
It is one kind, not shown) actual measurement ambient temperature T0, as the input of ambient temperature rate of load condensate computer A, then ambient temperature rate of load condensate
Computer A according to linearly or nonlinearly relation computing environment temperature load rate P01, using ambient temperature rate of load condensate P01 as ring
The output of border temperature load rate computer A.
For example cold season is being supplied, when ambient temperature T0 changes in the range of 25 DEG C～40 DEG C, according to linear relationship correspondence environment
Temperature load rate P01 changes in the range of 30%～100%；When ambient temperature T0 is less than 25 DEG C, ambient temperature rate of load condensate P01 is
30%, when ambient temperature T0 is higher than 40 DEG C, ambient temperature rate of load condensate P01 is 100%.In the present embodiment, as ambient temperature
A kind of optional physical relationship of T0 and ambient temperature rate of load condensate P01：When 25 DEG C≤T0≤40 DEG C, P01=(7 × T0-
130)/150；As 25 DEG C of T0 ＜, P01=30%；As 40 DEG C of T0 ＞, P01=100%.
With regard to above-mentioned ambient humidity rate of load condensate computer B, by ambient humidity transmitter (in above-mentioned related measure and control instrument
One kind, not shown) actual measurement ambient humidityAs the input of ambient humidity rate of load condensate computer, then ambient humidity rate of load condensate
Computer B is according to ambient humidityComputing environment humidity rate of load condensate P02.Calculated ambient humidity rate of load condensate P02 is used as ring
The output of border humidity rate of load condensate computer B.
For example supplying cold season, ambient humidityWhen changing in the range of 60%～90%, according to linear relationship correspondence ring
Border humidity rate of load condensate P02 changes in the range of 0%～100%；Ambient humidityDuring less than 60%, ambient humidity rate of load condensate P02
For 0%；Ambient humidityDuring higher than 90%, ambient humidity rate of load condensate P02 is 100%.In the present embodiment, as environmental wet
DegreeWith a kind of optional physical relationship of ambient humidity rate of load condensate P02, whenWhen,WhenWhen, P02=0；WhenWhen, P02=100%.
With regard to above-mentioned temperature difference setting apparatus C, the input 1 of the output of ambient temperature rate of load condensate computer A as temperature difference setting apparatus C
(i.e. P01), the output of ambient humidity rate of load condensate computer B as temperature difference setting apparatus C input 2 (i.e. P02), to input 1 and defeated
Enter 2 and be weighted read group total, obtain rate of load condensate Lr.Specifically, Lr=is input into 1 × k1+ input 2 × k2, wherein k1+k2=1.
In the present embodiment, preferred k1=0.7, k2=0.3, also, k1/k2 are thermic load and humidity load ratio.
Further, with rate of load condensate Lr as independent variable, calculating temperature difference setting value Tspr, using temperature difference setting value Tspr as
The output of temperature difference setting apparatus.When rate of load condensate Lr changes in the range of 30%～100%, corresponding temperature difference setting value Tspr is 1.5
DEG C～4.5 DEG C in the range of change, and the Lr and Tspr meet linearly or nonlinearly relation.In the present embodiment, so that cold season is
Example, as rate of load condensate Lr and a kind of possible physical relationship of temperature difference setting value, Tspr=(60 × Lr+3)/14.
With regard to above-mentioned supply backwater temperature difference computer D, the supply water temperature T1 measured by related measure and control instrument and return water temperature T2
Input 1 and input 2 respectively as supply backwater temperature difference computer, the difference of supply water temperature T1 and return water temperature T2 referred to as supplies backwater
The temperature difference, using the supply backwater temperature difference as the output of supply backwater temperature difference computer D.
With regard to above-mentioned supply backwater temperature difference controller E, the output Tspr's and supply backwater temperature difference computer D of temperature difference setting apparatus C
Export the input 1 and input 2 respectively as supply backwater temperature difference controller E.Wherein, the output Tspr conducts of temperature difference setting apparatus C
The setting value of supply backwater temperature difference controller E；Measurement of the output of supply backwater temperature difference computer D as supply backwater temperature difference controller E
Value, supply backwater temperature difference controller E adopts pid control algorithm；Pressure of supply water is used as in the output obtained by the pid control algorithm
Setting value Psp1, the Psp1 generates pressure of supply water set point Psp, as supply backwater temperature difference control through upper and lower amplitude limiting processing
The output of device E.Wherein, the pressure of supply water value when higher limit of pressure of supply water set point is system maximum load, lower limit is
Pressure of supply water value during system minimum load, the higher limit and lower limit are obtained according to the experience of system operation.
With regard to above-mentioned pressure of supply water controller G, the output of supply backwater temperature difference controller E and pressure of supply water is measured
The pressure of supply water measurement signal for arriving respectively as pressure of supply water controller G input 1 and input 2, wherein, for water temperature difference control
Used as the setting value of pressure of supply water controller G, pressure of supply water measurement signal is used as pressure of supply water controller G for the output of device E
Measured value, pressure of supply water controller G adopts pid control algorithm
Used as the input signal of above-mentioned executor H, the executor H is correspondingly in Fig. 1 for the output of pressure of supply water controller G
P201 or P202, the executor H can be using variable frequency pump or regulating valves.
The subregion vari- able flow control system based on meteorological condition for providing according to embodiments of the present invention, can realize having as follows
Beneficial effect：
First, rational supply backwater temperature difference not only represents economy, and also comfort level is had an impact.The temperature difference is too small, system energy
Effect is low, conversely, be difficult to ensure that the requirement of comfort level, and water supply difference variation is slower, is control it unfavorable
Factor, supply backwater temperature difference controller of the present invention adopts cascade control system with pressure of supply water controller, can effectively overcome whole
The delayed big problem in loop, when air conditioner load changes, is reflected in quickly first the change of pressure of supply water, pressure of supply water controller
Can be adjusted automatically such that it is able to ensure that supply backwater temperature difference does not have too big fluctuation to a certain extent.
Also, on the basis of being automatically controlled according to load variations for pressure of return water, when supply backwater temperature difference changes,
Because its change is less, supply backwater temperature difference controller just can be adjusted using slower speed, and this just can adapt to
The characteristics of its is delayed big, supply backwater temperature difference controller output can automatically change the setting value of pressure of supply water controller, further real
The accurate adjustment of the existing temperature difference；
Additionally, the bound by arranging the output of supply backwater temperature difference controller, is equal to set pressure of supply water bound, energy
Enough ensure the reasonability of water rationing, it is to avoid the use in heating power least favorable loop can require that pressure of supply water is too low to cause waterpower to be lost
The maximum loop insufficient water of weighing apparatus, i.e. resistance.
Finally, compared to fixed supply backwater temperature difference set value calculation strategy, supply backwater temperature difference is changed more according to rate of load condensate
Rationally, under underload, because system has a least quantity to meet hydraulic equilibrium, cause supply backwater temperature difference less than normal, and with
The increase of load, it is allowed to which supply backwater temperature difference increases, therefore it is an advantage of the current invention that：The occasion of steady load indoors, can
According to outdoor temperature, the humidity reflection change of energy load, by temp.-differential control, economical operation is realized.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by the scope of the claims.
Claims (3)
1. a kind of water rationing vari- able flow control system based on meteorological condition, is applied to the big system of air-conditioning, it is characterised in that bag
Include：
Ambient temperature rate of load condensate computer, ambient temperature transmitter surveys ambient temperature as the ambient temperature rate of load condensate computer
Input, according to linearly or nonlinearly relation computing environment temperature load rate, as the defeated of the ambient temperature rate of load condensate computer
Go out；
Ambient humidity rate of load condensate computer, ambient humidity transmitter surveys ambient humidity as the ambient humidity rate of load condensate computer
Input, according to linearly or nonlinearly relation computing environment humidity rate of load condensate, as the defeated of the ambient humidity rate of load condensate computer
Go out；
Temperature difference setting apparatus, the output and the output of the ambient humidity rate of load condensate computer of the ambient temperature rate of load condensate computer
Input 1 and input 2 respectively as the temperature difference setting apparatus, to the input 1 and the input 2 read group total is weighted, and is born
Lotus rate, with the rate of load condensate as independent variable, according to linearly or nonlinearly relation temperature difference setting value is calculated, used as the temperature difference setting
The output of device；
Supply backwater temperature difference computer, supply water temperature and return water temperature are respectively as the input 1 of the supply backwater temperature difference computer and defeated
Enter 2, used as supply backwater temperature difference, the supply backwater temperature difference is used as the supply backwater temperature difference computer for the difference of supply water temperature and return water temperature
Output；
Supply backwater temperature difference controller, the temperature difference setting apparatus output and the supply backwater temperature difference computer output respectively as
The input 1 and input 2 of the supply backwater temperature difference controller, wherein, the output of the temperature difference setting apparatus is used as supply backwater temperature difference control
The setting value of device；Used as the measured value of the supply backwater temperature difference controller, this supplies backwater for the output of the supply backwater temperature difference computer
Differential temperature controller adopts pid control algorithm；The output obtained by the pid control algorithm through upper and lower amplitude limiting processing, as confession
The output of backwater temperature difference controller；
Pressure of supply water controller, the output of the supply backwater temperature difference controller and measures the confession hydraulic pressure for obtaining to pressure of supply water
Power measurement signal respectively as the pressure of supply water controller input 1 and input 2, wherein, the water supply differential temperature controller it is defeated
Go out the setting value as the pressure of supply water controller, measurement of the pressure of supply water measurement signal as the pressure of supply water controller
Value, the pressure of supply water controller adopts pid control algorithm；And
Executor, used as the input of the executor, the executor adjusts correspondence subregion for the output of the pressure of supply water controller
Water supply flow.
2. water rationing vari- able flow control system according to claim 1, it is characterised in that set the rate of load condensate as Lr,
Then the Lr meets with the input 1 and input 2 of the temperature difference setting apparatus：Lr=is input into 1 × k1+ and is input into 2 × k2, wherein, k1+k2
=1.
3. water rationing vari- able flow control system according to claim 1 and 2, it is characterised in that the executor adopts
Variable frequency pump or regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611208361.0A CN106594996B (en) | 2016-12-23 | 2016-12-23 | Water rationing vari- able flow control system based on meteorological condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611208361.0A CN106594996B (en) | 2016-12-23 | 2016-12-23 | Water rationing vari- able flow control system based on meteorological condition |
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| CN106594996A true CN106594996A (en) | 2017-04-26 |
| CN106594996B CN106594996B (en) | 2019-04-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114719408A (en) * | 2022-03-29 | 2022-07-08 | 湖北合合能源科技发展有限公司 | Method for adjusting central air-conditioning system by using meteorological data |
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| US6549826B1 (en) * | 2000-10-25 | 2003-04-15 | Honeywell International Inc. | VAV airflow control for preventing processor overflow and underflow |
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| Publication number | Publication date |
|---|---|
| CN106594996B (en) | 2019-04-05 |
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