CN106839275A - Refrigerating water pump intelligent energy-saving control method in central air-conditioning monitoring system - Google Patents
Refrigerating water pump intelligent energy-saving control method in central air-conditioning monitoring system Download PDFInfo
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- CN106839275A CN106839275A CN201611272622.5A CN201611272622A CN106839275A CN 106839275 A CN106839275 A CN 106839275A CN 201611272622 A CN201611272622 A CN 201611272622A CN 106839275 A CN106839275 A CN 106839275A
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
-
- 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
- F24F11/46—Improving electric energy efficiency or saving
- F24F11/47—Responding to energy costs
-
- 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
-
- 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
- F24F11/65—Electronic processing for selecting an operating mode
-
- 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
- F24F11/85—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 variable-flow pumps
-
- 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
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
-
- 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)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Designed the present invention relates to refrigerating water pump intelligent energy-saving control method in a kind of central air-conditioning monitoring system, the technical problem owed for refrigerating water pump intelligent energy-saving design of control method in existing central air-conditioning monitoring system.Its main points is when the end load of central air-conditioning changes, water system supply and return water temperature, the temperature difference, pressure difference and flow also change therewith, flowmeter, these parameters that differential pressure pickup and temperature sensor will be detected deliver to intelligent electric saving manager, intelligent electric saving manager is according to the real time data for being gathered and the historical data of system, according to variable frequency pump efficiency highest, the total power consumption of the variable frequency pump minimum freezing of principle adjust automatically pump operation number of units and frequency, frequency is according to " temperature difference is used as outer shroud, the advanced composite ring control algolithm that pressure difference is constituted as inner ring " is adjusted, and temperature difference setting value is dynamically adjusted and optimized according to the equilibrium of supply and demand of end cold, and then control the acting of chilled water pump, change chilled-water flow, system output energy is matched with end load demand.
Description
Technical field
It is refrigerating water pump intelligent energy-saving control in a kind of central air-conditioning monitoring system the present invention relates to be central air-conditioning monitoring system
Method processed.
Background technology
Central air conditioner system is made up of one or more cold and heat source systems and multiple air handling systems, typically using liquid
The principle of refrigeration is vaporized for air handling system provides institute's chilling requirement, is used to offset the thermic load of indoor environment；Heating is
Air handling system provides institute's calorific requirement, is used to offset indoor environment refrigeration duty.Refrigeration system is central air conditioner system to closing weight
The part wanted, it uses species, the method for operation, structure type etc. to directly affects central air conditioner system economy in operation
Property, high efficiency, reasonability.Existing central air conditioner system typically passes through control system or prison to reach the effect of energy saving
Control system is realized automatically adjusting；Application number 201510593195.X as disclosed in Chinese patent literature, Shen Qing Publication day
2015.12.09, denomination of invention " central air-conditioning variable-flow optimizes system "；Its main points be the refrigeration host computer of the system, cooling pump,
Refrigerating water pump, heat-exchanger pump are respectively equipped with dynamic controller, cooling pump dynamic throttling instrument, refrigerating water pump dynamic throttling instrument, heat-exchanger pump dynamic
Throttling instrument, and be connected with computer by signal switch board respectively；Each bypass duct of water knockout drum and water collector is respectively equipped with electronic
Regulating valve and temperature sensor, cooling pump and refrigerating water pump are respectively equipped with flowmeter, differential pressure pickup, temperature sensor, refrigeration master
The outlet pipe of machine is provided with temperature sensor, and computer is analyzed to data, controls corresponding dynamic throttling instrument and dynamic control
Device, and water outlet and water inlet；Building manager is adjusted by temperature controller to the temperature in room, and computer passes through fan unit
The circuit of pipe is monitored to the temperature of temperature controller.But in the above method and system the intelligent energy-saving of refrigerating water pump (cooling pump) from
Dynamic, artificial control mode effect is poor, the side such as temperature difference setting, the selection setting of the constant pressure temperature difference, the standard temperature difference, optimal supply backwater temperature difference
Face needs to be further improved.
The content of the invention
To overcome above-mentioned deficiency, the purpose of the present invention is to refrigerating water pump in a kind of central air-conditioning monitoring system of this area offer
Intelligent energy-saving control method, makes it solve refrigerating water pump and cooling pump intelligent energy-saving control method in existing central air-conditioning monitoring system
For the temperature difference, inconvenience, refrigerating water pump, the automatic and artificial control mode switching of intelligent energy-saving of cooling pump, the technology for setting inconvenience are set
Problem.The purpose is to what is be achieved through the following technical solutions.
A kind of refrigerating water pump intelligent energy-saving control method in central air-conditioning monitoring system, the control method includes refrigeration station machine
Room, computer, and its pipeline connection room end, refrigeration station computer room include refrigeration host computer, refrigerating water pump, cooling pump, water collector,
Relevant device, the control program of water knockout drum, heat-exchanger pump, and its frequency-conversion control cabinet and signal switch board, computer and computer, with
And frequency-conversion control cabinet and signal switch board constitute fuzzy controller, the control program of computer is central air-conditioning monitoring system, point
Hydrophone connects water main, and water main is connected with the outlet pipe of refrigerating water pump, the outlet pipe of refrigeration host computer, water collector connection backwater
House steward, return main is connected with the water inlet pipe of refrigerating water pump, the outlet pipe of refrigeration host computer, the water inlet pipe of cooling pump and cooling tower it is cold
But the variable frequency pump connection of tower blower fan, the outlet pipe of cooling pump is provided with cooling valve, freezes with the water inlet pipe junction of refrigeration host computer
The outlet pipe of pump is provided with freezing valve with the outlet pipe junction of refrigeration host computer, and heat-exchanger pump is connected with water knockout drum, water collector respectively；Room
Between end include blower fan, fan coil, building manager and temperature controller, fan coil is respectively arranged at the air outlet in room, room
Interior to be respectively equipped with temperature controller, temperature controller is connected with the circuit of fan coil, and the floor in room is respectively equipped with building manager, wind
The circuit of machine coil pipe is connected with building manager respectively, and building manager is connected by signal switch board with computer respectively；Institute
State refrigeration host computer cooling pump, refrigerating water pump, heat-exchanger pump and be respectively equipped with dynamic controller, cooling pump dynamic throttling instrument, refrigerating water pump dynamic
Throttling instrument, heat-exchanger pump dynamic throttling instrument, and be connected with computer by signal switch board respectively；Each bypass duct of the water knockout drum
Be respectively equipped with electric control valve, each bypass duct difference temperature sensor of water collector, the outfall sewer of cooling pump be provided with flowmeter,
Temperature sensor, the water inlet manifold of refrigerating water pump is provided with flowmeter, differential pressure pickup, temperature sensor, the outlet pipe of refrigeration host computer
Temperature sensor, above-mentioned electric control valve, temperature sensor, flowmeter, differential pressure pickup, dynamic are respectively equipped with water main
Throttling instrument and dynamic controller are connected by signal switch board with computer respectively, and signal switch board is provided with intelligent energy-saving management
Device, and inner ring and outer rings controller；The computer enters to the data of flowmeter, differential pressure pickup, temperature sensor transmission
Row analysis, by the frequency converter in frequency-conversion control cabinet to refrigerating water pump, cooling pump, heat-exchanger pump dynamic throttling instrument, and refrigeration master
The dynamic controller of machine is controlled, and the water outlet by electric control valve to water knockout drum is controlled；Building manager is by temperature
Control device is adjusted to the temperature in room, and computer is monitored by the circuit of fan coil to the temperature of temperature controller；Its
It is characterised by：When the end load of central air-conditioning changes, water system supply and return water temperature, the temperature difference, pressure difference and flow also with
Change, these parameters that flowmeter, differential pressure pickup and temperature sensor will be detected deliver to intelligent electric saving manager, intelligence
Real time data and the historical data of system that electric saving manager foundation is gathered, according to variable frequency pump efficiency highest, variable frequency pump
Total the power consumption minimum freezing of principle adjust automatically pump operation number of units and frequency, and then the acting of chilled water pump is controlled, change freezing
Water-carrying capacity, makes system export energy and matches with end load demand.
The frequency carries out intelligence according to " the advanced composite ring control algolithm that the temperature difference is constituted as outer shroud, pressure difference as inner ring "
Can adjust, and the equilibrium of supply and demand that temperature difference setting value can intelligently according to end cold dynamically adjustment and optimization.Meanwhile, it is described in
Inner ring and outer rings director demon in the monitoring air-conditioner of centre is provided with the setting of constant pressure difference, first by inner ring and outer rings controller
MANUAL CONTROL mode is switched to by automatic control mode, constant pressure difference is confirmed with input through keyboard carriage return, checked after determining rationally,
Input in ring controller, will inner ring differential pressure controller original manual control mode put into automatic control mode.The central hollow
Adjust the inner ring and outer rings director demon in monitoring system to be provided with the setting of the standard temperature difference, the standard temperature difference is returned with input through keyboard first
Car confirm, check determine rationally after, input in ring controller, will inner ring differential pressure controller original manual control mode put into from
Dynamic control mode；Treat interior ring controller automatic running for a period of time, when pressure difference PV values and pressure difference SP values are substantially close to stablizing, prepare
Input outer ring controller；After confirming that all parameter settings of outer ring controller are reasonable, after interior ring controller tenacious tracking, start input
Outer ring controller, will outer shroud differential temperature controller original manual control mode put into automatic control mode.The central air-conditioning prison
Inner ring and outer rings director demon in control system is provided with optimal supply backwater temperature difference function of search, initial landing central air-conditioning prison
Engineer's level-right account of control system；Then chosen in " Based Intelligent Control " one column in " optimizing regulation ", by refrigerating water pump
Supply backwater temperature difference setting value is switched to " intelligent control mode ", then chooses " automatically adjusting " in " shaping modes " one column, in
Centre monitoring air-conditioner can automatically search for optimal supply backwater temperature difference setting value SP in the COP maximum searchings algorithm that comes into operation.
The central air-conditioning monitoring system is provided with the administrator mode that keeper manually controls, i.e., supervised in central air-conditioning
What control system exited variable frequency pump number of units automatically controls logic, is manually determined to open by keeper, then need to switch " system
Set " picture, current model selection is switched to " administrator mode ", percent frequency ratio is manually entered, set frequency converter
Minimum lower frequency limit.
Temperature adjustment high precision of the invention, dynamic property are good, manual or automatic to set convenient, simple to operate；In being suitable as
The intelligent energy-saving control method of refrigerating water pump and cooling pump in the monitoring air-conditioner of centre, ex hoc genus anne central air-conditioning monitoring system enter
One step is improved.
Brief description of the drawings
Fig. 1 is structure block diagram of the invention.
Fig. 2 is principle schematic diagram. of the invention.
Fig. 3 is key frame window of the invention.
Fig. 4 is system setting screen window of the invention, and variable frequency pump number of units is manually opened in figure need to be switched to pipe
Reason person's pattern.
Fig. 5 is administrator mode of the invention manually remote activation 1# refrigerating water pumps picture window.
Fig. 6 is that system of the invention enters freezing temperature difference regulation panel entry button position picture and the setting of the complex loop temperature difference
Value maximum searching algorithm operating picture window.
Fig. 7 is that system of the invention enters refrigerating water pump inner ring constant-pressure drop controller panel picture and complex loop Intelligent adjustment is drawn
Face-port mouthful.
Specific embodiment
In conjunction with accompanying drawing, to transformation of the invention, using and operation principle be further described.It is central shown in Fig. 1-Fig. 7
When entreating the end load of air-conditioning to change, water system supply and return water temperature, the temperature difference, pressure difference and flow also change therewith, flowmeter,
These parameters that differential pressure pickup and temperature sensor will be detected deliver to intelligent electric saving manager, intelligent electric saving manager foundation
The real time data and the historical data of system for being gathered, according to variable frequency pump efficiency highest, the minimum original of the total power consumption of variable frequency pump
Then adjust automatically freezing pump operation number of units and frequency, and then control chilled water pump acting, change chilled-water flow, make system defeated
Go out energy to match with end load demand.Wherein, frequency according to " temperature difference as outer shroud, pressure difference as inner ring constitute it is advanced
Complex loop control algolithm " carries out Intelligent adjustment, and the equilibrium of supply and demand dynamic that temperature difference setting value can intelligently according to end cold
Adjustment and optimization so that it is least in power-consuming that variable frequency pump is consumed, and reaches optimal energy-saving effect.
Its concrete operations is as follows：The Based Intelligent Control of refrigerating water pump number of units is cut off, administrator mode is changed to and is manually opened.When
Air-conditioning system is operated under intelligent mode, and now variable frequency pump unit number control logic transfers to intelligent electric saving manager to perform, intelligence
Water system supply and return water temperature, the temperature difference, pressure difference and flow and the historical data of system that electric saving manager foundation is gathered, according to change
Frequency pump efficiency highest, the minimum principle adjust automatically freezing pump operation number of units of the total power consumption of variable frequency pump, if now keeper thinks
That exits variable frequency pump number of units automatically controls logic, is manually determined to open by keeper, then need to switch to that " system sets
Put " picture, current model selection is switched to " administrator mode " shown in red block diagram, now keeper is again by the page
" key frame " is switched to, in the picture relevant position mouse-click of 1#~4# refrigerating water pumps, it is assumed that user wants to increase 1# refrigerating water pumps simultaneously
Connection converting operation, clicks the ejection of 1# refrigerating water pumps, and operation is indicated according to the button on picture.
Excision freezing pump frequency automatic regulation function, is changed to administrator mode and manually sets.In the main picture of refrigeration system
In face, " the freezing temperature difference " button in red block region is clicked on；After mouse clicks on " the freezing temperature difference " button, picture will be ejected.
Sign region, " will automatically adjust " be switched to " regulation manually " pattern first, then in " output MAN：70.00% " this column
In, after being manually entered percent frequency ratio, it is assumed that need for frequency converter to manually set 45HZ operations, then by following computing formula
It is converted into percent data：45Hz/50Hz*100%=90%, carriage return confirms after input 90%.
The setting minimum lower frequency limit of frequency converter, ensures the rotating speed that refrigerating water pump normally runs.Mouse is clicked on " the freezing temperature difference " and is pressed
After button, picture will be ejected." regulation manually " is switched to " automatically adjusting " pattern, you can realize that the frequency of refrigerating water pump is automatically adjusted
Function, 70% is input into " lower control limit " one column and then realizes that lower frequency limit 35HZ runs, in addition on the transducer body on set
It is also last one effective guarantee for preventing frequency converter minimum speed to put low-limit frequency.
The outer shroud temperature difference pid loop of Intelligent Composite ring is cut off, freezing pump frequency is adjusted according to inner ring 0.3bar constant-pressure drops PID
Section.In refrigeration system key frame, " the freezing temperature difference " button in red block region is clicked by mouse right button.Click by mouse right button
After " the freezing temperature difference " button, picture will be ejected.Inner ring and outer rings controller is switched to control manually by automatic control mode first
Molding formula, then according to " setting SP " setting area is found in sign region, by the 0.3bar input through keyboard carriage returns of constant pressure difference
Confirm whether rationally finally reexamine a parameter setting, it is determined that after rationally, ring controller in input will inner ring pressure difference
Controller original manual control mode puts into automatic control mode.
The freezing pump frequency that comes into operation is not less than 0.2bar Intelligent Composites ring and adjusts according to 5 DEG C of backwater constant difference is supplied, for backwater pressure difference
Section.In refrigeration system key frame, " the freezing temperature difference " button in red block region is clicked by mouse right button, will eject picture.It is first
Inner ring and outer rings controller is first switched to MANUAL CONTROL mode, now inner ring and outer rings controller keeps former output state,
Then it is according to " pressure difference lower limit " setting area is found in sign region, minimum pressure difference 0.2bar is true with input through keyboard carriage return
Recognize, then " setting SP " setting area found in region shown in red block diagram, 5 DEG C are confirmed with input through keyboard carriage return by the standard temperature difference,
Whether rationally finally reexamine a parameter setting, prepare the operating procedure of input inner ring and outer rings controller.The first step：It is first
Whether all parameter settings of ring controller are reasonable in first confirming, it is determined that after rationally, ring controller in input will inner ring pressure difference control
Device original manual control mode processed puts into automatic control mode.Second step：Treat interior ring controller automatic running for a period of time, pressure difference
When PV values and pressure difference SP values are substantially close to stablizing, prepare input outer ring controller.3rd step：Confirm all parameters of outer ring controller
Set whether rationally, it is to be determined rationally after, after interior ring controller tenacious tracking, start put into outer ring controller, will outer shroud temperature
Difference controller original manual control mode puts into automatic control mode.
The COP maximum searchings algorithm that comes into operation searches for optimal supply backwater temperature difference setting value SP automatically.Initial landing engineer
The authority account of rank, then in refrigeration system key frame, " the freezing temperature difference " that left mouse button is clicked in red block region is pressed
Button, will eject picture.Picture is that refrigerating water pump supply backwater temperature difference setting value realizes intelligence according to COP Energy Efficiency Ratio maximum searchings algorithm
The operation screen of setting.To realize that this is operated, engineer chooses in " Based Intelligent Control " one column first in " optimizing regulation ", will
Refrigerating water pump supply backwater temperature difference setting value is switched to " intelligent control mode ", is then chosen in " shaping modes " one column " automatic to adjust
Section ".Ratio P, integration I, the differential D in " PID regulations " column, and upper control limit and lower control limit data are not changed, these
Data producer has been adjusted to optimal in equipment debugging, and user is without modification；Meanwhile, do not change " parameter setting "
Filtering h, frequency W in column, amplitude a, gain K, and the optimizing upper limit and optimizing lower data, these data producers are setting
In standby debugging, it has been adjusted to optimal, user is without modification.
In sum, the optimal control of the hot air-conditioning system frequency conversion water pump of cooling of the invention is to realize variable-flow technical energy saving
The important channel of benefit, for caused by the personalized regulation for adapting to the hot air conditioning system user of cooling flow system flow excursion compared with
Characteristic wide is, it is necessary to many variable frequency pump parallel connection frequency conversion operations simultaneously, frequent change formulation of the system to hydraulic regime is in parallel to be become
Frequency pump energy saving operation reserve brings certain difficulty.In parallel connection frequency conversion control system of water pump, variable frequency pump FREQUENCY CONTROL
Loop is located at bottom, and is typically referenced to pressure difference or flow and realizes, variable frequency pump unit number control logic is located at frequency control-loop
Upper strata, the optimization aim of unit number control logic is to ensure at each pump working state under same hydraulic regime point efficient
Area, makes the total power consumption of parallel connection frequency conversion water pump as low as possible.
Meanwhile, according to above-mentioned refrigerating water pump identical operating method and operation principle, also can be in the central air conditioner system
Cooling pump carries out identical operation, the button of each operation corresponding selection cooling pump.
Claims (6)
1. refrigerating water pump intelligent energy-saving control method in a kind of central air-conditioning monitoring system, the control method include refrigeration station computer room,
Computer, and its pipeline connection room end, refrigeration station computer room include refrigeration host computer, refrigerating water pump, cooling pump, water collector, point
Relevant device, the control program of hydrophone, heat-exchanger pump, and its frequency-conversion control cabinet and signal switch board, computer and computer, and
Frequency-conversion control cabinet and signal switch board constitute fuzzy controller, and the control program of computer is central air-conditioning monitoring system, point water
Device connects water main, and water main is connected with the outlet pipe of refrigerating water pump, the outlet pipe of refrigeration host computer, and water collector connection backwater is total
Pipe, return main is connected with the water inlet pipe of refrigerating water pump, the cooling of the outlet pipe of refrigeration host computer, the water inlet pipe of cooling pump and cooling tower
The variable frequency pump connection of tower blower fan, the outlet pipe of cooling pump is provided with cooling valve, refrigerating water pump with the water inlet pipe junction of refrigeration host computer
The outlet pipe junction of outlet pipe and refrigeration host computer be provided with freezing valve, heat-exchanger pump is connected with water knockout drum, water collector respectively；Room
End includes blower fan, fan coil, building manager and temperature controller, and fan coil is respectively arranged at the air outlet in room, room
Temperature controller is inside respectively equipped with, temperature controller is connected with the circuit of fan coil, the floor in room is respectively equipped with building manager, blower fan
The circuit of coil pipe is connected with building manager respectively, and building manager is connected by signal switch board with computer respectively；
The refrigeration host computer cooling pump, refrigerating water pump, heat-exchanger pump are respectively equipped with dynamic controller, cooling pump dynamic throttling instrument, freezing
Pump dynamic throttling instrument, heat-exchanger pump dynamic throttling instrument, and be connected with computer by signal switch board respectively；The water knockout drum it is each
Bypass duct is respectively equipped with electric control valve, and each bypass duct difference temperature sensor of water collector, the outfall sewer of cooling pump is provided with
Flowmeter, temperature sensor, the water inlet manifold of refrigerating water pump are provided with flowmeter, differential pressure pickup, temperature sensor, refrigeration host computer
Outlet pipe and water main are respectively equipped with temperature sensor, above-mentioned electric control valve, temperature sensor, flowmeter, pressure difference sensing
Device, dynamic throttling instrument and dynamic controller are connected by signal switch board with computer respectively, and signal switch board is provided with intelligent section
Electric manager, and inner ring and outer rings controller；The computer is transmitted to flowmeter, differential pressure pickup, temperature sensor
Data are analyzed, by the frequency converter in frequency-conversion control cabinet to refrigerating water pump, cooling pump, heat-exchanger pump dynamic throttling instrument, and
The dynamic controller of refrigeration host computer is controlled, and the water outlet by electric control valve to water knockout drum is controlled；Building manager
The temperature in room is adjusted by temperature controller, computer is supervised by the circuit of fan coil to the temperature of temperature controller
Control；
It is characterized in that：When the end load of central air-conditioning changes, water system supply and return water temperature, the temperature difference, pressure difference and stream
Amount also changes therewith, and these parameters that flowmeter, differential pressure pickup and temperature sensor will be detected deliver to intelligent energy-saving management
Device, intelligent electric saving manager, according to variable frequency pump efficiency highest, becomes according to the real time data for being gathered and the historical data of system
The total power consumption of frequency the water pump minimum freezing of principle adjust automatically pump operation number of units and frequency, and then the acting of chilled water pump is controlled, change
Variable chilled water flowrate, makes system export energy and matches with end load demand.
2. refrigerating water pump intelligent energy-saving control method in central air-conditioning monitoring system as claimed in claim 1, it is characterised in that institute
State frequency carries out Intelligent adjustment according to " the advanced composite ring control algolithm that the temperature difference is constituted as outer shroud, pressure difference as inner ring ", and
Temperature difference setting value intelligently the equilibrium of supply and demand according to end cold dynamically adjustment and can optimize.
3. refrigerating water pump intelligent energy-saving control method in central air-conditioning monitoring system as claimed in claim 2, it is characterised in that institute
State the inner ring and outer rings director demon in central air-conditioning monitoring system and be provided with the setting of constant pressure difference, first by inner ring and outer rings control
Device processed is switched to MANUAL CONTROL mode by automatic control mode, and constant pressure difference is confirmed with input through keyboard carriage return, checks and determines to close
After reason, input in ring controller, will inner ring differential pressure controller original manual control mode put into automatic control mode.
4. refrigerating water pump intelligent energy-saving control method in central air-conditioning monitoring system as claimed in claim 2, it is characterised in that institute
State the inner ring and outer rings director demon in central air-conditioning monitoring system and be provided with the setting of the standard temperature difference, first by standard temperature difference key
Disk input carriage return confirms, after checking determination rationally, ring controller in input will inner ring differential pressure controller original manual control mode
Put into automatic control mode；Treat interior ring controller automatic running for a period of time, pressure difference PV values are with pressure difference SP values substantially close to steady
Regularly, input outer ring controller is prepared；After confirming that all parameter settings of outer ring controller are reasonable, interior ring controller tenacious tracking
Afterwards, start put into outer ring controller, will outer shroud differential temperature controller original manual control mode put into automatic control mode.
5. refrigerating water pump intelligent energy-saving control method in central air-conditioning monitoring system as claimed in claim 2, it is characterised in that institute
State the inner ring and outer rings director demon in central air-conditioning monitoring system and be provided with optimal supply backwater temperature difference function of search, step on first
Engineer's level-right account of land central air-conditioning monitoring system；Then hooked in " Based Intelligent Control " one column in " optimizing regulation "
Choosing, " intelligent control mode " is switched to by refrigerating water pump supply backwater temperature difference setting value, then chosen in " shaping modes " one column " from
Dynamic regulation ", central air-conditioning monitoring system can automatically search for optimal supply backwater temperature difference and set in the COP maximum searchings algorithm that comes into operation
Definite value SP.
6. refrigerating water pump intelligent energy-saving control method in central air-conditioning monitoring system as claimed in claim 1, it is characterised in that institute
State central air-conditioning monitoring system and be provided with the administrator mode that keeper manually controls, i.e., exited in central air-conditioning monitoring system
Variable frequency pump number of units automatically controls logic, is manually determined to open by keeper, then need to switch " system setting " picture,
Current model selection is switched to " administrator mode ", percent frequency ratio is manually entered, the minimum lower limit of setting frequency converter is frequently
Rate.
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| CN117091241B (en) * | 2023-08-21 | 2024-04-16 | 中瑞恒（北京）科技有限公司 | Cold-warm water temperature difference control optimizing energy-saving method |
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