CN106594996B - Water rationing vari- able flow control system based on meteorological condition - Google Patents

Water rationing vari- able flow control system based on meteorological condition Download PDF

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Publication number
CN106594996B
CN106594996B CN201611208361.0A CN201611208361A CN106594996B CN 106594996 B CN106594996 B CN 106594996B CN 201611208361 A CN201611208361 A CN 201611208361A CN 106594996 B CN106594996 B CN 106594996B
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temperature difference
supply
water
controller
rate
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CN106594996A (en
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王祯
冯洁羽
柯杏
王玉亮
王志明
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Xinzhi Energy System Control Co Ltd
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Xinzhi Energy System Control Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2130/00Control inputs relating to environmental factors not covered by group F24F2110/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2130/00Control inputs relating to environmental factors not covered by group F24F2110/00
    • F24F2130/10Weather information or forecasts

Abstract

The present invention discloses a kind of water rationing vari- able flow control system based on meteorological condition, is related to air-conditioning technical field, supplies water for solving for the problem that the big system partitioning of air-conditioning, is difficult to meet economy or the comfort level requirement with energy using traditional control system.Water rationing vari- able flow control system provided in an embodiment of the present invention includes environment temperature rate of load condensate calculator, ambient humidity rate of load condensate calculator, temperature difference setting apparatus, supply backwater temperature difference calculator, supply backwater temperature difference controller, pressure of supply water controller, actuator and related measure and control instrument.Water rationing vari- able flow control system provided by the invention based on meteorological condition is used for central air conditioner system.

Description

Water rationing vari- able flow control system based on meteorological condition
Technical field
The present invention relates to air-conditioning technical field more particularly to a kind of water rationing vari- able flow control systems based on meteorological condition System.
Background technique
Multiple branch's energy supplies region (i.e. subregion) can be divided by water supply branch in the big system of air-conditioning, water rationing can usually lead to Quenched, tune amount is crossed to realize, under using tune amount means, the prior art generally according to for return water differential pressure, supply backwater temperature difference to confession Water flow is adjusted.However, since there are serious lag, subregion room terminal temperature, temperature controller operating status etc. for process Information is not fully used, further perfect not enough for energy control function, be easy to cause excessively energy supply or Person is to be difficult to meet the problem of comfort level requires.
Summary of the invention
The water rationing vari- able flow control system based on meteorological condition that the purpose of the present invention is to provide a kind of, for solving It supplies water for the big system partitioning of air-conditioning, is difficult to meet using traditional control system and be asked with what the economy or comfort level of energy required Topic.
Water rationing vari- able flow control system provided by the invention based on meteorological condition is applied to the big system of air-conditioning, packet It includes:
Environment temperature rate of load condensate calculator, environment temperature transmitter survey environment temperature as the environment temperature rate of load condensate meter The input for calculating device calculates environment temperature rate of load condensate according to linearly or nonlinearly relationship, as the environment temperature rate of load condensate calculator Output;
Ambient humidity rate of load condensate calculator, ambient humidity transmitter survey ambient humidity as the ambient humidity rate of load condensate meter The input for calculating device calculates ambient humidity rate of load condensate according to linearly or nonlinearly relationship, as the ambient humidity rate of load condensate calculator Output;
Temperature difference setting apparatus, output and the ambient humidity rate of load condensate calculator of the environment temperature rate of load condensate calculator The input 1 and input 2 respectively as the temperature difference setting apparatus are exported, read group total is weighted to the input 1 and the input 2, is obtained To rate of load condensate, using the rate of load condensate as independent variable, temperature difference setting value is calculated according to linearly or nonlinearly relationship, as the temperature difference The output of setting apparatus;
The input 1 of supply backwater temperature difference calculator, supply water temperature and return water temperature respectively as the supply backwater temperature difference calculator With input 2, the difference of supply water temperature and return water temperature is as supply backwater temperature difference, and the supply backwater temperature difference is as the supply backwater temperature difference meter 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 calculator are distinguished Input 1 and input 2 as the supply backwater temperature difference controller, wherein the output of the temperature difference setting apparatus is as supply backwater temperature difference The setting value of controller;Measured value of the output of the supply backwater temperature difference calculator as the supply backwater temperature difference controller, the confession Backwater temperature difference controller uses pid control algorithm;The output obtained by the pid control algorithm is made by 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 the confession that pressure of supply water is measured Input 1 and input 2 of the water pressure measuring signal respectively as the pressure of supply water controller, wherein the water supply differential temperature controller Setting value of the output as the pressure of supply water controller, the pressure of supply water measuring signal is as the pressure of supply water controller Measured value, the pressure of supply water controller use pid control algorithm;And
Actuator, input of the output of the pressure of supply water controller as the actuator, the actuator adjust corresponding point The water supply flow in area.
The water rationing vari- able flow control system provided according to the present invention can obtain it is following the utility model has the advantages that
Firstly, reasonable supply backwater temperature difference not only represents economy, also have an impact to comfort level.The temperature difference is too small, system energy Effect is low, conversely, be difficult to ensure the requirement of comfort level, and water supply difference variation is slower, be control it is unfavorable Factor, supply backwater temperature difference controller of the present invention and pressure of supply water controller use cascade control system, can effectively overcome entire Circuit lags big problem, when air conditioner load variation, is reflected in the variation of pressure of supply water, pressure of supply water controller quickly first It can be adjusted automatically, so as to guarantee that supply backwater temperature difference does not have too big fluctuation to a certain extent.
Also, on the basis of being automatically controlled for pressure of return water according to load variations, when supply backwater temperature difference changes, Because its variation be it is lesser, supply backwater temperature difference controller can be adjusted using slower speed, this just can adapt to It lags big feature, and the output of supply backwater temperature difference controller can change the setting value of pressure of supply water controller automatically, further real The accurate adjustment of the existing temperature difference;
In addition, the bound exported by setting supply backwater temperature difference controller, is equal to setting pressure of supply water bound, energy The reasonability for enough guaranteeing water rationing avoids the use in heating power least favorable circuit that from capable of requiring, and pressure of supply water is too low to will lead to waterpower mistake Weighing apparatus, the i.e. maximum circuit insufficient water of resistance.
Finally, changing supply backwater temperature difference more according to rate of load condensate compared to fixed supply backwater temperature difference set value calculation strategy Rationally, under underload, because system is to meet hydraulic equilibrium there are a least quantity, cause supply backwater temperature difference less than normal, and with The increase of load, allow supply backwater temperature difference to increase, therefore the present invention has the advantages that the occasion of steady load indoors, can According to outdoor temperature, the humidity reflection variation of energy load, is controlled by temp.-differential, realize economical operation.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of central air conditioner system provided by the embodiment of the present invention.
Fig. 2 is the structural block diagram of water rationing vari- able flow control system provided by the embodiment of the present invention.
Specific embodiment
The water rationing vari- able flow control system based on meteorological condition that embodiment provides in order to further illustrate the present invention, It is described in detail with reference to the accompanying drawings of the specification.
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, Applied in air-conditioning system shown in FIG. 1, it (is 1~subregion of subregion m), Mei Gefen in Fig. 1 which, which 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 equipped in each room in multiple rooms Configured with temperature controller, the temperature controller is for controlling the actual temperature in the room.
Corresponding each subregion is equipped with variable frequency pump, which is used to control the water supply flow in corresponding subregion, in this implementation In example, variable frequency pump P201 is set in subregion 1, variable frequency pump P202 is set in subregion m.For cold season, by water cooler to each point Area supplies water, and provides cooling capacity into each subregion room whereby.By taking subregion 1 as an example, supply water temperature T1, return water temperature T2 are supplied Hydraulic pressure is P by force.
As shown in Fig. 2, water rationing vari- able flow control system provided in an embodiment of the present invention includes environment temperature rate of load condensate Calculator A, ambient humidity rate of load condensate calculator B, temperature difference setting apparatus C, supply backwater temperature difference calculator D, supply backwater temperature difference controller E, pressure of supply water controller G, actuator H and related measure and control instrument (not shown);
About above-mentioned environment temperature rate of load condensate calculator A, by environment temperature transmitter (in above-mentioned correlation measure and control instrument It is one kind, not shown) actual measurement environment temperature T0, as the input of environment temperature rate of load condensate calculator A, then environment temperature rate of load condensate Calculator A calculates environment temperature rate of load condensate P01 according to linearly or nonlinearly relationship, using the environment temperature rate of load condensate P01 as ring The output of border temperature load rate calculator A.
Such as environment is being corresponded to according to linear relationship when environment temperature T0 changes within the scope of 25 DEG C~40 DEG C for cold season Temperature load rate P01 changes in 30%~100% range;When environment temperature T0 is lower than 25 DEG C, environment temperature rate of load condensate P01 is When 30%, environment temperature T0 are higher than 40 DEG C, environment temperature rate of load condensate P01 is 100%.In the present embodiment, as environment temperature A kind of optional physical relationship of T0 and environment temperature rate of load condensate P01: when 25 DEG C≤T0≤40 DEG C, P01=(7 × T0- 130)/150;When 25 DEG C of T0 <, P01=30%;When 40 DEG C of T0 >, P01=100%.
About above-mentioned ambient humidity rate of load condensate calculator B, by ambient humidity transmitter (in above-mentioned correlation measure and control instrument One kind, not shown) actual measurement ambient humidityAs the input of ambient humidity rate of load condensate calculator, then ambient humidity rate of load condensate Calculator B is according to ambient humidityCalculate ambient humidity rate of load condensate P02.The ambient humidity rate of load condensate P02 being calculated is as ring The output of border humidity rate of load condensate calculator B.
Such as cold season, ambient humidityWhen changing in the range of 60%~90%, ring is corresponded to according to linear relationship Border humidity rate of load condensate P02 changes in 0%~100% range;Ambient humidityWhen lower than 60%, ambient humidity rate of load condensate P02 It is 0%;Ambient humidityWhen 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%.
About above-mentioned temperature difference setting apparatus C, input 1 of the output of environment temperature rate of load condensate calculator A as temperature difference setting apparatus C (i.e. P01), input 2 (i.e. P02) of the output as temperature difference setting apparatus C of ambient humidity rate of load condensate calculator B, to inputting 1 and defeated Enter 2 and be weighted read group total, obtains rate of load condensate Lr.Specifically, Lr=inputs 1 × k1+ and inputs 2 × k2, wherein k1+k2=1. In the present embodiment, preferably k1=0.7, k2=0.3, also, k1/k2 are thermic load and humidity load ratio.
Further, using rate of load condensate Lr as independent variable, calculating temperature difference setting value Tspr, using the temperature difference setting value Tspr as The output of temperature difference setting apparatus.When rate of load condensate Lr changes in 30%~100% range, corresponding temperature difference setting value Tspr is 1.5 DEG C~4.5 DEG C within the scope of change, and the Lr and Tspr meet linearly or nonlinearly relationship.In the present embodiment, so that cold season is Example, as a kind of possible physical relationship of rate of load condensate Lr and temperature difference setting value, Tspr=(60 × Lr+3)/14.
About above-mentioned supply backwater temperature difference calculator D, the supply water temperature T1 and return water temperature T2 measured by related measure and control instrument The difference of input 1 and input 2 respectively as supply backwater temperature difference calculator, supply water temperature T1 and return water temperature T2 are referred to as return water The temperature difference, using the supply backwater temperature difference as the output of supply backwater temperature difference calculator D.
About above-mentioned supply backwater temperature difference controller E, temperature difference setting apparatus C's exports Tspr's and supply backwater temperature difference calculator D Export the input 1 and input 2 respectively as supply backwater temperature difference controller E.Wherein, the output Tspr conduct 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 calculator D as supply backwater temperature difference controller E Value, the supply backwater temperature difference controller E use pid control algorithm;The output obtained by the pid control algorithm is as pressure of supply water Setting value Psp1, the Psp1 pass through upper and lower amplitude limiting processing, generate pressure of supply water setting range Psp, control as supply backwater temperature difference The output of device E.Wherein, the pressure of supply water value when upper limit value of pressure of supply water setting range is system maximum load, lower limit value are Pressure of supply water value when system minimum load, the upper limit value and lower limit value are obtained according to the experience that system is run.
About above-mentioned pressure of supply water controller G, the output of supply backwater temperature difference controller E and pressure of supply water is measured Input 1 and input 2 of the pressure of supply water measuring signal arrived respectively as pressure of supply water controller G, wherein controlled for water temperature difference Setting value of the output of device E as pressure of supply water controller G, pressure of supply water measuring signal is as pressure of supply water controller G Measured value, the pressure of supply water controller G use pid control algorithm
Input signal of the output as above-mentioned actuator H of pressure of supply water controller G, in actuator H corresponding diagram 1 Variable frequency pump or regulating valve can be used in P201 or P202, actuator H.
The subregion vari- able flow control system based on meteorological condition provided according to embodiments of the present invention, can be realized has as follows Beneficial effect:
Firstly, reasonable supply backwater temperature difference not only represents economy, also have an impact to comfort level.The temperature difference is too small, system energy Effect is low, conversely, be difficult to ensure the requirement of comfort level, and water supply difference variation is slower, be control it is unfavorable Factor, supply backwater temperature difference controller of the present invention and pressure of supply water controller use cascade control system, can effectively overcome entire Circuit lags big problem, when air conditioner load variation, is reflected in the variation of pressure of supply water, pressure of supply water controller quickly first It can be adjusted automatically, so as to guarantee that supply backwater temperature difference does not have too big fluctuation to a certain extent.
Also, on the basis of being automatically controlled for pressure of return water according to load variations, when supply backwater temperature difference changes, Because its variation be it is lesser, supply backwater temperature difference controller can be adjusted using slower speed, this just can adapt to It lags big feature, and the output of supply backwater temperature difference controller can change the setting value of pressure of supply water controller automatically, further real The accurate adjustment of the existing temperature difference;
In addition, the bound exported by setting supply backwater temperature difference controller, is equal to setting pressure of supply water bound, energy The reasonability for enough guaranteeing water rationing avoids the use in heating power least favorable circuit that from capable of requiring, and pressure of supply water is too low to will lead to waterpower mistake Weighing apparatus, the i.e. maximum circuit insufficient water of resistance.
Finally, changing supply backwater temperature difference more according to rate of load condensate compared to fixed supply backwater temperature difference set value calculation strategy Rationally, under underload, because system is to meet hydraulic equilibrium there are a least quantity, cause supply backwater temperature difference less than normal, and with The increase of load, allow supply backwater temperature difference to increase, therefore the present invention has the advantages that the occasion of steady load indoors, can According to outdoor temperature, the humidity reflection variation of energy load, is controlled by temp.-differential, realize economical operation.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described 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, which is characterized in that packet It includes:
Environment temperature rate of load condensate calculator, environment temperature transmitter survey environment temperature as the environment temperature rate of load condensate calculator Input, according to linearly or nonlinearly relationship calculate environment temperature rate of load condensate, as the defeated of the environment temperature rate of load condensate calculator Out;
Ambient humidity rate of load condensate calculator, ambient humidity transmitter survey ambient humidity as the ambient humidity rate of load condensate calculator Input, according to linearly or nonlinearly relationship calculate ambient humidity rate of load condensate, as the defeated of the ambient humidity rate of load condensate calculator Out;
Temperature difference setting apparatus, the output of the environment temperature rate of load condensate calculator and the output of the ambient humidity rate of load condensate calculator Input 1 and input 2 respectively as the temperature difference setting apparatus, are weighted read group total to the input 1 and the input 2, are born Temperature difference setting value is calculated according to linearly or nonlinearly relationship using the rate of load condensate as independent variable in lotus rate, sets as the temperature difference The output of device;
Supply backwater temperature difference calculator, supply water temperature and return water temperature are respectively as the input 1 of the supply backwater temperature difference calculator and defeated Enter 2, the difference of supply water temperature and return water temperature is as supply backwater temperature difference, and the supply backwater temperature difference is as the supply backwater temperature difference calculator Output;
Supply backwater temperature difference controller, the temperature difference setting apparatus output and the supply backwater temperature difference calculator 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 controlled as supply backwater temperature difference The setting value of device;Measured value of the output of the supply backwater temperature difference calculator as the supply backwater temperature difference controller, this is for return water Differential temperature controller uses pid control algorithm;The output obtained by the pid control algorithm is by 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 to pressure of supply water measure for hydraulic pressure Power measuring signal respectively as the pressure of supply water controller input 1 and input 2, wherein the water supply differential temperature controller it is defeated Setting value as the pressure of supply water controller out, measurement of the pressure of supply water measuring signal as the pressure of supply water controller Value, the pressure of supply water controller use pid control algorithm;And
Actuator, input of the output of the pressure of supply water controller as the actuator, the actuator adjust corresponding subregion Water supply flow.
2. water rationing vari- able flow control system according to claim 1, which is characterized in that set the rate of load condensate as Lr, Then the input 1 and input 2 of the Lr and the temperature difference setting apparatus meet: Lr=inputs 1 × k1+ and inputs 2 × k2, wherein k1+k2 =1.
3. water rationing vari- able flow control system according to claim 1 or 2, which is characterized in that the actuator uses Variable frequency pump or regulating valve.
CN201611208361.0A 2016-12-23 2016-12-23 Water rationing vari- able flow control system based on meteorological condition Active CN106594996B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6549826B1 (en) * 2000-10-25 2003-04-15 Honeywell International Inc. VAV airflow control for preventing processor overflow and underflow
KR20040094101A (en) * 2003-05-01 2004-11-09 엘지전자 주식회사 By-pass device with variable flow rate of multi air-conditioner system
JP2010249454A (en) * 2009-04-17 2010-11-04 Mitsubishi Electric Building Techno Service Co Ltd Facility operation system
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