CN100487332C - Energy-saving intelligent control system for central air conditioner - Google Patents
Energy-saving intelligent control system for central air conditioner Download PDFInfo
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- CN100487332C CN100487332C CNB2005100173497A CN200510017349A CN100487332C CN 100487332 C CN100487332 C CN 100487332C CN B2005100173497 A CNB2005100173497 A CN B2005100173497A CN 200510017349 A CN200510017349 A CN 200510017349A CN 100487332 C CN100487332 C CN 100487332C
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Abstract
This invention relates to central air conditioning intelligent control system, which puts the system relative device running status feedback signals and medium temperature, pressure and flow signals into the central monitor computer and connects the charging meter and intelligent fan pipe output communication to the central monitor computer. The computer monitors each user real-time consumption and integrates the air conditioning cold water flow, temperature and air cooling compressor running load proportion to make the host machine operate at best proportion and to balance the demands of user with the supply of the air conditioning.
Description
One, technical field: the present invention relates to a kind of central air-conditioning energy automatic control management system, particularly relate to a kind of central air-conditioning energy intelligence control system and control method.
Two, background technology: central air-conditioning is exactly the interior air handling system of building of a central heating (or cooling), and it comprises three parts:
1, cold (heat) center, source, required cold (or heat) when air conditioning in the building is provided, low-temperature receiver is generally the electric refrigerating machine group, or the refrigeration heat unit, and thermal source is generally boiler or source pump:
2, cold (heat) amount transmission system, be divided into water system, air system and fluorine Lyons system, water system comprises water pump, pipeline, valve, the branch/cylinder that catchments, cold/hot water etc., air system comprises blower fan, airduct, air-valve, air port etc., and fluorine Lyons system contains flow divider, pipeline, chlorofluoromethane refrigerant etc.;
3, terminal air handling system is finished cold (heat) exchange of air in the building, and the three forms a complete central air conditioner system.
At present common large-scale central air-conditioning is many to be medium with water, and terminal air handling system adopts fan coil, and energy is exchanged to realize central cooling or heat supply at user's end and center of energy.The operation of central air-conditioning now realizes the adjusting of air conditioner energy supply substantially with the automatic control of refrigeration host computer, the foundation of the confession/return water temperature of chilled water as the terminal device load variations, be difficult to avoid ageing hysteresis usually, and is unfavorable energy-saving and cost-reducing.In the central air-conditioning actual motion, because each zone of building air conditioning is subjected to the influence of outside and inner various factors, its required heat, humidity load are constantly changed, this just need carry out suitable adjusting to the central air conditioner system each several part.A good central air conditioner system will really reach energy-efficient purpose, design, the installation process in early stage only lay the foundation, equipment, pipeline are in place, its energy (heat) amount loss in transmission course is the operational management that constant, energy-efficient key still is the later stage substantially.Current application comparative maturity flow/heat control method, confession, return water temperature with central air-conditioning are the foundation of demand for energy, realize supply as required by cold output quantity Song who adjusts the central air-conditioning refrigeration host computer, its principle is referring to accompanying drawing 3, be traditional surplus determining method that is used for central air-conditioning energy control: central air-conditioning detects chilled water and advances/return water temperature, and the calculating temperature difference, when the temperature difference overgauge temperature difference, think supply less than demand, need to increase the refrigeration host computer load; The central air-conditioning chilled water advances/when equaling the standard temperature difference, backwater temperature difference thinks that supply equals demand, need to keep the refrigeration host computer load; The central air-conditioning chilled water advances/and backwater temperature difference thinks in large supply in demand during less than the standard temperature difference, needs to reduce the refrigeration host computer load.This management method has realized that to a certain extent the energy of central air-conditioning controls automatically, has reached certain energy-saving and cost-reducing effect, but these methods are confined to cold (heat) center, source this among a small circle in, have following shortcoming:
1, the confession of central air-conditioning, return water temperature are the reactions of the surplus difference after the central air conditioner system energy requirement balance, are not the real terminal demand of central air-conditioning;
2, the confession of central air-conditioning, return water temperature reactions change time are longer, cause the control lag of robot control system(RCS); 3, can not guarantee the critical condition of central air conditioner system, as evaporimeter freeze, high and low pressure protection etc.
In this respect, relevant technologies personnel have carried out a series of effective explorations, China Patent No. is a kind of central air-conditioning intelligent and energy saving system of 01107645.3, with the Programmable Logic Controller is core, by the water temperature in each sensor detection central air conditioner system and the variation of aerial temperature and humidity, by the central air-conditioning expertise knowledge base and the control program that exist in the Programmable Logic Controller, by ambient parameter and system mode are analyzed, judge, handle, the freezing water yield of step-less adjustment, the rotating speed of cooling water inflow and blower fan of cooling tower, whole central air conditioner system is moved under the high efficiency state, realize energy-conservation to greatest extent: China Patent No. is a kind of compression central air-conditioning self adaptation unsteady flow amount joint control system of 02133684.9, by white adaptation unsteady flow amount controller, the cooling-water machine RACS, the chilled water pump RACS, the cooling water control subsystem, the blower fan of cooling tower RACS is formed, self adaptation unsteady flow amount controller is connected with system each RACS respectively by communication interface, make every operating index of each equipment of system reach optimization, make system be in optimum Working, thereby reach energy saving purposes, reduce the equipment running noises simultaneously, reduce mechanical wear, strengthen safety in operation, prolonged equipment life.This two foundation that directly controls to adjust all is (being surplus determining method shown in Figure 3) of relatively judging terminal air handling system energy requirement amount by the metering central air-conditioning chilled water import/export temperature difference and the standard temperature difference, regulate refrigeration when simultaneously it pursues equilibrium of supply and demand or heat main frame energy-producing how many times, the best Energy Efficiency Ratio that does not have the taking into account system operation, because of it is not the real-time institute energy requirement of system terminal, sometimes these energy do not have or can not be effectively used fully, thereby can not reach the optimization of energy-conservation limit, be difficult to avoid existing the part energy waste.
Three, summary of the invention: the utility model patent " central air-conditioning taximeter " that the present invention utilizes prior art and applicant to patent recently and authorize, propose and realize a kind of brand-new central air-conditioning energy intelligent control management system and control method, with the real-time required energy consumption of central air-conditioning end-equipment is the adjusting foundation of central air conditioner system energy supply, with the best Energy Efficiency Ratio operation curve of refrigeration host computer serves as to regulate core, realize the optimum economic benefit of central air-conditioning operation, guarantee the equilibrium of supply and demand of central air conditioner system energy.
The technical solution adopted in the present invention:
A kind of central air-conditioning energy intelligence control system, contain central air conditioner system refrigeration host computer, chilled water system, the cooling water system center monitoring computer of unifying, and compressor, blower fan, water pump operation state measure and control device, cold/heat transmit medium temperature, pressure, flow measuring and controlling device in the system, in central air conditioner system:
(1) entery and delivery port at water pump, refrigeration host computer, cooling tower, the cylinder that catchments, branch water vat is provided with temperature sensor, and temperature sensor output signal inserts the center monitoring computer by the multiplex temperature collection template through EBI,
(2) entery and delivery port at water pump, refrigeration host computer, cooling tower, the cylinder that catchments, branch water vat is provided with pressure transmitter, and the pressure transmitter output signal inserts the center monitoring computer by multichannel pressure acquisition template through EBI,
(3) the PLC programmable controller is adopted in field control, PLC is by the communication interface control refrigeration host computer of refrigeration host computer Main Control Tank, PLC connects cooling water pump, chilled water pump and cooling blower and transducer control circuit thereof by lead, control the duty of cooling water pump, chilled water pump and cooling blower
(4) handpiece Water Chilling Units master signal feedback is electrically connected PLC, cooling water import/export electrically operated valve, chilled water import/export electrically operated valve open degree feedback signal are electrically connected PLC by A/D converter, handpiece Water Chilling Units pressure signal feedback, handpiece Water Chilling Units fault feedback, cooling blower overload feedback, water flow failure feedback and power supply trouble feedback are electrically connected PLC, PLC and center monitoring computer are realized both-way communication by bus
With the real-time required energy consumption of central air-conditioning end-equipment as central air conditioner system refrigeration or heat the regulation and control foundation of energy supply, " approach " with running status and to freeze or heat the best Energy Efficiency Ratio operation curve of main frame as system's regulate and control operation target, the operating load ratio of flow, temperature and refrigeration host computer compressor by comprehensive adjustment central air-conditioning chilled water, cooling water, make each user refrigeration or heat the energy demand sum and the central air-conditioning energize balances each other, reach the optimum state of central air-conditioning economical operation, to obtain the maximization of source benefit.
Described central air-conditioning energy intelligence control system, the central air-conditioning fan coil is connected with the central air-conditioning taximeter, perhaps the central air-conditioning fan coil adopts intelligent fan coil, the charging outputting communication connects the center monitoring computer, the center monitoring computer real-time detects and calculates total energy heating capacity or the refrigerating capacity demand sum of each user side of central air-conditioning, put into shared data bank,, supply the system call of central air-conditioning energy automatic control management as the regulation and control foundation that central air conditioner system is regulated; The center monitoring computer advances according to the chilled water that records, the outlet temperature difference and flow calculate central air conditioner system energy supply by the first law of thermodynamics, put into shared data bank in real time, for the system call of central air-conditioning energy automatic control management: real-time required energy consumption of central air-conditioning end-equipment and central air conditioner system energy supply and compare in the center monitoring computer automatic control management system real-time calling shared data bank, the best Energy Efficiency Ratio curve of the refrigeration host computer that in equipment specification, provides in conjunction with the refrigeration host computer manufacturer that pre-deposits in the center monitoring computer, make the control corresponding instruction, by PLC field controller output corresponding control signals blower fan, equipment is imported and exported in pump variable frequency device running frequency and the system, pipeline electrically operated valve open degree, comprehensive adjustment central air-conditioning chilled water, cooling water flow, the load of temperature and refrigeration host computer compressor, make the system equipment running status " approach " its best Energy Efficiency Ratio curve, and, refrigeration host computer is provided with corresponding to heating capacity of the real-time energy requirement of central air-conditioning user side or refrigerating capacity output according to on-the-spot testing result correction operating process.
Described central air-conditioning energy intelligence control system, temperature, pressure, flow, voltage, electric current measure and control device are connected with center monitoring computer and PLC's in the system, adopt the bus communication mode, the bus communication mode is the CAN bus, or be the RS485 bus, or the RS232 bus, or be the LONWORK bus.
A kind of control method of aforesaid central air-conditioning energy intelligence control system, the operating procedure under the center monitoring computer control be, (1) initialization, and start-up system, the calling and typing of basic parameter,
Whether (2) system detects the central air-conditioning user side the fan coil operation, if then do not close all handpiece Water Chilling Units, then calculates the required load of current fan coil operation if having,
(3) whether monitoring has the handpiece Water Chilling Units operation, if then do not start handpiece Water Chilling Units according to calculated load, if having then according to required Load Regulation handpiece Water Chilling Units operating load.
The control method of described central air-conditioning energy intelligence control system, separate unit central air-conditioning unit is regulated by the real-time required energy consumption of system, follows following principle during many units:
Preferential operation minimum unit accumulative total start-up time when A, loading;
Preferential the longest unit of time out of service when B, off-load;
C, preferentially start capacity and the immediate unit of real-time requirement amount.
Positive beneficial effect of the present invention:
1, the present invention utilizes computer network to combine automatic control technology with mechanics of communication, propose first and with the foundation of central air-conditioning end-equipment real time energy consumption as central air conditioner system energy supply, and take into full account the energy-saving effect of system, having proposed with the best Energy Efficiency Ratio curve of refrigeration host computer serves as to regulate core, it is once surmounting to central air-conditioning tradition auto-control energy-saving management method, make the every operating index of system reach optimization, make energy saving of system consumption reduction maximum effect, make system equipment be in optimal operational condition simultaneously, enhancing system safety in operation prolongs equipment life.
2, central air-conditioning energy intelligence control system of the present invention adopts collecting and distributing type structure, modularized design, and each monitoring subsystem adopts the bus communication mode to the center monitoring computer, helps installing, construction, and key is that the maintenance in later stage and maintenance are quite convenient.
3, central air-conditioning energy intelligence control system in-site measurement of the present invention and control are separated, make the confirmation that cooperatively interacts of control action and measured value, convenient implementation status and the effect of understanding command adapted thereto, adopt PLC field monitoring and each corresponding subsystem of control, control execution efficient and reliability are improved greatly, can utilize the product of different manufacturers to make up and replace, help system compatible and expansion, maintain easily maintenance, make things convenient for the user optimization type selecting, mate relative best equipment and Related product.
Four, description of drawings:
Fig. 1: central air-conditioning energy intelligence control system frame structure schematic diagram
Fig. 2: central air-conditioning energy intelligence control system operating procedure schematic diagram
Fig. 3: conventional central air-conditioning flow/heat control method operating procedure schematic diagram
Fig. 4: open the best Energy Efficiency Ratio curve map of sharp 30HXC300A handpiece Water Chilling Units
Five, the specific embodiment:
Embodiment one: in conjunction with Fig. 1, present embodiment is certain professional office building water-cooled handpiece Water Chilling Units central air-conditioning energy intelligence control system specific embodiment.28000 square metres of this office building construction areas, 16 layers, 38 square metres of category-A standard office room construction areas, totally 416 overlap, and every cover is joined a FP6.3 fan coil; 27 square metres of category-B standard office room construction areas, totally 143 overlap, and every cover is joined a FP5.0 fan coil.The central air-conditioning refrigeration plant adopts three Shanghai to open sharp 30HXC300A handpiece Water Chilling Units, and three Y200L type cooling water pumps, three Y200L2 type chilled water pumps, 500 tons of cooling towers, 800 tons of cooling towers, total system are that parallel dual-purpose one is equipped with design.
On terminal each the typhoon coiler of central air-conditioning, a central meter for air conditioner is set, and send real time data to the center monitoring computer, foundation as energy requirement, at water pump, refrigeration host computer, cooling tower, cylinder catchments, divide advancing of water vat, delivery port is provided with electronic temperature transmitter, insert the center monitoring computer by multiplex temperature collection template and EBI, at water pump, refrigeration host computer, cooling tower, cylinder catchments, divide advancing of water vat, delivery port is provided with the mouth pressure transmitter, inserting the center monitoring computer by multichannel pressure acquisition template and EBI, is the monitoring subsystem for system; The PLC programmable controller is adopted in field control, at cooling water pump, chilled water pump, blower fan of cooling tower is provided with frequency converter, PLC is by the communication interface control connection refrigeration host computer of refrigeration host computer Main Control Tank, PLC connects cooling water pump by lead, chilled water pump and cooling blower and transducer control circuit thereof, the master control output of each frequency converter connects blower fan of cooling tower and cooling, the chilled water pump motor, at refrigeration host computer, confession/the return pipe of cooling tower is provided with the bypass electrically operated valve, at the cylinder that catchments, divide between the water vat water vat pressure reduction bypass electrically operated valve is set, be to be system's control corresponding subsystem, system's handpiece Water Chilling Units master signal feedback is electrically connected PLC, the coolant outlet electrically operated valve, freezing import and export electrically operated valve open degree feedback signal is electrically connected PLC by A/D converter, handpiece Water Chilling Units pressure signal feedback, handpiece Water Chilling Units fault feedback, blower fan of cooling tower overload feedback, water flow failure feedback and power supply trouble feedback are electrically connected PLC, PLC is connected the realization both-way communication with the center monitoring computer, the central air-conditioning taximeter, perhaps communication is connected with the center monitoring computer in the charging output of intelligent fan coil, the center monitoring computer contains configuration software, detect the required energy consumption of central air-conditioning end-equipment in real time, put into shared data bank, as the adjusting foundation that central air conditioner system is regulated, supply the system call of central air-conditioning energy automatic control management; Calculate central air conditioner system energy supply by the main frame chilled water import and export temperature difference and flow by the first law of thermodynamics, put into shared data bank in real time, for the system call of central air-conditioning energy automatic control management; Each user side of central air-conditioning heated or the refrigerating capacity demand during the center monitoring computer real-time detected and calculates, real-time required energy consumption of central air-conditioning end-equipment and central air conditioner system energy supply and compare in the real-time calling shared data bank, in conjunction with the best Energy Efficiency Ratio curve of refrigeration host computer that pre-deposits in the systems soft ware, send the control corresponding instruction with the PLC communication and by the PLC field controller, output corresponding control signals control blower fan, pump variable frequency device running frequency and relevant device, pipeline electrically operated valve open degree, provide with central air-conditioning user side real-time requirement is corresponding to and heat or refrigerating capacity output, center monitoring computer automatic control management system comprehensive adjustment central air-conditioning chilled water, cooling water flow, the load of temperature and refrigeration host computer compressor, make the system equipment running status " approach " manufacturer best Energy Efficiency Ratio curve is provided, and according to on-the-spot testing result correction operating process.
System's control procedure is referring to Fig. 2, central air-conditioning energy intelligence control system operating procedure: (1) initialization, and start-up system, the calling and typing of basic parameter,
Whether (2) system detects the central air-conditioning user side the fan coil operation, if then do not close all handpiece Water Chilling Units, then calculates the required load of current fan coil operation if having,
(3) whether monitoring has the handpiece Water Chilling Units operation, if then do not start handpiece Water Chilling Units according to calculated load, if having then according to required Load Regulation handpiece Water Chilling Units operating load.
Separate unit central air-conditioning unit is regulated by above-mentioned steps by the real-time required energy consumption of system, follows following principle during many units: preferential operation minimum unit accumulative total start-up time when (1) loads; (2) preferential the longest unit of time out of service during off-load; (3) preferentially start capacity and the immediate unit of real-time requirement amount.
Temperature, pressure, flow, voltage, electric current measure and control device are connected with center monitoring computer and PLC's in the system, and adopt CAN bus communication mode, or be the RS485 bus, the RS232 bus, or be the LONWORK bus, make things convenient for system in combination and expansion.
What Figure 4 shows that manufacturer provides opens the best Energy Efficiency Ratio curve map of sharp 30HXC300A handpiece Water Chilling Units.In system's running, be up to 4.2 as Energy Efficiency Ratio when the refrigeration unit output load is 86%, separate unit refrigerating capacity 1044Kw, not holding the energy requirement amount when a certain moment central air-conditioning is 1566Kw, at this moment three kinds of control schemes are arranged: 1, all with 50% load operation, comprehensive Energy Efficiency Ratio at this moment is 3.65 for three refrigeration unit; 2, a refrigeration unit stops, refrigeration unit 100% load operation, and another is with 50% load operation, and the comprehensive Energy Efficiency Ratio of central air-conditioning at this moment is 3.89; 3, a refrigeration unit stops, refrigeration unit 75% load operation, and another is with 75% load operation, and the comprehensive Energy Efficiency Ratio of central air-conditioning at this moment is 4.16; Obviously the third scheme is a preferred plan, thereby the realization system reaches maximization, the optimization of energy-saving effect with best Energy Efficiency Ratio curve motion.
Embodiment two: be certain residential building wind cooling cold and hot water unit central air-conditioning energy intelligence control system embodiment.Every seven floor of four multi-storey residential buildings is totally 16 unit, 24240 square metres of overall floorages, and wherein the air-conditioning area is 15756 square metres, A type dwelling house 48 families, a FP6.3 fan coil is joined in two Rooms, 135 square metre of three Room of construction area, three FP5.0 fan coils, a FP3.5 fan coil; Type B dwelling house 48 families, a FP6.3 fan coil is joined in two Rooms, 110 square metre of three Room of construction area, two FP5.0 fan coils, two FP3.5 fan coils; C type dwelling house 48 families, a FP6.3 fan coil is joined in two Rooms, 85 square metre of two Room of construction area, two FP5.0 fan coils, a FP3.5 fan coil; D type dwelling house 8 families, 240 square metres of construction areas are joined 2 FP6.3 fan coils, 4 FP5.0 fan coils, 2 FP3.5 fan coils; Amount to 736 typhoon coilers.Central air-conditioning adopts capital, four Taibei gold millions of people MTD100SH air-cooled heat pump handpiece Water Chilling Units, every residential building disposes one, two chilled water pumps of each central air conditioner main machine configuration, and one is equipped with a usefulness, 8 Y200L type chilled water pumps, total system are that parallel dual-purpose one is equipped with design.
Adopt the central air-conditioning charge system, on terminal each the typhoon coiler of central air-conditioning, a central meter for air conditioner is set, and send real time data to the center monitoring computer, foundation as energy requirement, at water pump, refrigeration host computer, cooling tower, cylinder catchments, divide advancing of water vat, delivery port is provided with electronic temperature transmitter, temperature sensor output signal inserts the center monitoring computer by the multiplex temperature collection template through EBI, at water pump, refrigeration host computer, cooling tower, cylinder catchments, divide advancing of water vat, delivery port is provided with pressure transmitter, and the pressure transmitter output signal inserts the center monitoring computer by multichannel pressure acquisition template through EBI; At cooling water pump, chilled water pump, blower fan of cooling tower frequency converter is set, insert the control corresponding subsystem, confession/return pipe at refrigeration host computer, cooling tower is provided with the bypass electrically operated valve, between the cylinder that catchments, branch water vat water vat, pressure reduction bypass electrically operated valve is set, insert the control corresponding subsystem, the refrigeration host computer Main Control Tank inserts the control corresponding subsystem.All monitoring subsystems adopt the bus communication mode directly to upload data to the center monitoring computer, the center monitoring computer is according to the energy requirement amount of monitoring in real time, the data of each monitoring point, assign corresponding operational order to on-the-spot PLC controller by the algorithm of setting in the bus communication mode, the instruction that on-the-spot PLC monitoring control devices control corresponding subsystem comes implementation center's supervisory control comuter to assign makes system equipment with the Energy Efficiency Ratio curve motion under the optimum state.
The relevant controlling management process no longer repeats at this referring to embodiment one.Central air-conditioning fan coil or adopt intelligent fan coil, the output of chargeing inserts the center monitoring computer.
Claims (5)
1. central air-conditioning energy intelligence control system, contain central air conditioner system refrigeration host computer, chilled water system, the cooling water system center monitoring computer of unifying, and compressor, blower fan, water pump operation state measure and control device in the system, cold/heat transmits medium temperature, pressure, flow measuring and controlling device, in central air conditioner system:
(1) entery and delivery port at water pump, refrigeration host computer, cooling tower, the cylinder that catchments, branch water vat is provided with temperature sensor, and temperature sensor output signal inserts the center monitoring computer by the multiplex temperature collection template through EBI,
(2) entery and delivery port at water pump, refrigeration host computer, cooling tower, the cylinder that catchments, branch water vat is provided with pressure transmitter, and the pressure transmitter output signal inserts the center monitoring computer by multichannel pressure acquisition template through EBI,
(3) the PLC programmable controller is adopted in field control, PLC is by the communication interface control refrigeration host computer of refrigeration host computer Main Control Tank, PLC connects cooling water pump, chilled water pump and cooling blower and transducer control circuit thereof by lead, control the duty of cooling water pump, chilled water pump and cooling blower
(4) handpiece Water Chilling Units master signal feedback is electrically connected PLC, cooling water import/export electrically operated valve, chilled water import/export electrically operated valve open degree feedback signal are electrically connected PLC by A/D converter, handpiece Water Chilling Units pressure signal feedback, handpiece Water Chilling Units fault feedback, cooling blower overload feedback, water flow failure feedback and power supply trouble feedback are electrically connected PLC, PLC and center monitoring computer are realized both-way communication by bus
It is characterized in that: with the real-time required energy consumption of central air-conditioning end-equipment as central air conditioner system refrigeration or heat the regulation and control foundation of energy supply, " approach " with running status and to freeze or heat the best Energy Efficiency Ratio operation curve of main frame as system's regulate and control operation target, the operating load ratio of flow, temperature and refrigeration host computer compressor by comprehensive adjustment central air-conditioning chilled water, cooling water, make each user refrigeration or heat the energy demand sum and the central air-conditioning energize balances each other, reach the optimum state of central air-conditioning economical operation, to obtain the maximization of source benefit.
2. central air-conditioning energy intelligence control system according to claim 1, it is characterized in that: the central air-conditioning fan coil is connected with the central air-conditioning taximeter, perhaps the central air-conditioning fan coil adopts intelligent fan coil, the charging outputting communication connects the center monitoring computer, the center monitoring computer real-time detects and calculates total energy heating capacity or the refrigerating capacity demand sum of each user side of central air-conditioning, put into shared data bank, as the regulation and control foundation that central air conditioner system is regulated, supply the system call of central air-conditioning energy automatic control management; The center monitoring computer calculates central air conditioner system energy supply according to the chilled water import and export temperature difference and the flow that record by the first law of thermodynamics, puts into shared data bank in real time, for the system call of central air-conditioning energy automatic control management; Real-time required energy consumption of central air-conditioning end-equipment and central air conditioner system energy supply and compare in the center monitoring computer automatic control management system real-time calling shared data bank, the best Energy Efficiency Ratio curve of the refrigeration host computer that in equipment specification, provides in conjunction with the refrigeration host computer manufacturer that pre-deposits in the center monitoring computer, make the control corresponding instruction, by PLC field controller output corresponding control signals blower fan, equipment is imported and exported in pump variable frequency device running frequency and the system, pipeline electrically operated valve open degree, comprehensive adjustment central air-conditioning chilled water, cooling water flow, the load of temperature and refrigeration host computer compressor, make the system equipment running status " approach " its best Energy Efficiency Ratio curve, and, refrigeration host computer is provided with corresponding to heating capacity of the real-time energy requirement of central air-conditioning user side or refrigerating capacity output according to on-the-spot testing result correction operating process.
3. central air-conditioning energy intelligence control system according to claim 1, it is characterized in that: temperature, pressure, flow, voltage, electric current measure and control device are connected with center monitoring computer and PLC's in the system, adopt the bus communication mode, the bus communication mode is the CAN bus, or be the RS485 bus, or the RS232 bus, or be the LONWORK bus.
4. the control method of a central air-conditioning energy intelligence control system according to claim 1 and 2 is characterized in that: the operating procedure under the center monitoring computer control is,
(1) initialization, start-up system, the calling and typing of basic parameter,
Whether (2) system detects the central air-conditioning user side the fan coil operation, if then do not close all handpiece Water Chilling Units, then calculates the required load of current fan coil operation if having,
(3) whether monitoring has the handpiece Water Chilling Units operation, if then do not start handpiece Water Chilling Units according to calculated load, if having then according to required Load Regulation handpiece Water Chilling Units operating load.
5. the control method of central air-conditioning energy intelligence control system according to claim 4 is characterized in that: separate unit central air-conditioning unit is regulated by the real-time required energy consumption of system, follows following principle during many units:
Preferential operation minimum unit accumulative total start-up time when A, loading;
Preferential the longest unit of time out of service when B, off-load;
C, preferentially start capacity and the immediate unit of real-time requirement amount.
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| CN102080863A (en) * | 2010-12-08 | 2011-06-01 | 海尔集团公司 | Control method and device of central air conditioner |
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