CN201992769U - Digital integrated intelligent control system of central air-conditioner - Google Patents
Digital integrated intelligent control system of central air-conditioner Download PDFInfo
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- CN201992769U CN201992769U CN201120120421XU CN201120120421U CN201992769U CN 201992769 U CN201992769 U CN 201992769U CN 201120120421X U CN201120120421X U CN 201120120421XU CN 201120120421 U CN201120120421 U CN 201120120421U CN 201992769 U CN201992769 U CN 201992769U
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Abstract
The utility model relates to a digital integrated intelligent control system of a central air-conditioner, which has the key technology of building an intelligent working condition calculation control processing system to accurately calculate timely dynamic supplied water temperature. The intelligent working condition calculation control processing system consists of a fan coil working condition collection processing module group, an indoor supplied water temperature calibration module and a simulation calculation correction supplied water temperature module; an air-conditioner main machine is enabled to refrigerate according to dynamic actual requirements under the control of the intelligent working condition calculation control processing system, simultaneously the digital integrated intelligent control system can fit for economic operating condition performance curve of the air-conditioner main machine, reduce the consumption of the air-conditioner main machine and timely meet the requirements of indoor air-conditioning effect; and an operation marginal adjusting method of required cold capacity and efficiency built through the working condition signals and energy efficiency evaluation signals of the air-conditioner main machine can continuously adjust the energy efficiency of the air-conditioner main machine, and reduce running of the air-conditioner main machine under low working conditions, thereby correspondingly saving the consumed energy of the air-conditioner main machine.
Description
Technical field
The utility model relates to a kind of central air-conditioning digitlization integrated intelligence control system, belongs to the air conditioner energy saving field.
Background technology
Existing central air-conditioning control device is controlled from system, has only the change water temperature on the final essential technique, becomes two kinds of modes of current.Control from terminal air-conditioner and also to have only variable air rate, variable water volume (change current) becomes three aspects of water temperature. on the technical foundation, building prosecutor formula is arranged, the Industry Control mode.
The change of technique that becomes current is more, and mainly is various energy-conservation companies, on its control technology, mainly with DDC, DCS, PLC, MES control technology means are the basis, are conceived to the control of calculator room equipment water pump, are fuzzy reference with the outdoor environment humiture, with supply and return water temperature, supply backwater temperature difference is for backwater pressure reduction, discharge, the indoor and outdoor humiture is the control variables amount of calculation, to water pump, blower fan of cooling tower carries out frequency conversion, and the unsteady flow amount is regulated control; By temperature for backwater, the temperature difference influences air-conditioner host, the crucial basis of calculation amount of its frequency conversion, unsteady flow amount control system is based on " the fuzzy reasoning value of expertise " " set-point of experience inference " and " follows the fuzzy inference value that water temperature changes ", in fact, be exactly " broad experience coarse value ", rather than adapt to the accurate Calculation controlling value of the central air conditioner system of real-time transition with the refrigeration duty variation.Not with air-conditioning system in real-time room conditioning effect, the outdoor environment of least favorable point set up calculated with mathematical model, do not reach central air-conditioning with cold end-equipment, the accurate control that subsidiary engine equipment, air-conditioner host, system pipe network connect real-time transition each other concerns.The accurate Calculation that does not have the demand cold, just can not reach central air-conditioning total system equipment: terminal with cool equipment (directly controlling the air-conditioning effect), the refrigerant water pump, cooling water pump, blower fan of cooling tower, the efficiency of the precise figures association of interconnection operating modes such as air conditioner refrigerating main frame is regulated and control, CN1375665A, CN1415915, CN200880010537.9, the 200620123889.3 disclosed devices that come to this.Not having the error of the accurate crucial calculating parameter of system-demand cold (dynamic demand supply and return water temperature value), this control crux value is central air conditioner system Energy Saving Control key of success, also be energy efficiency of equipment than the key of control. in good time the feed water variation of water temperature of also with good grounds machine room, the derive method of feedwater water temperature of next demand of reference statistical data, 200820080180.9 be exactly this method, obviously, this is not a method of directly calculating the feedwater water temperature by the dynamic actual load of air-conditioning.
Becoming the water temperature technology, owing to the control based on air-conditioner host, is the employing of air-conditioning production plant mostly, considers owing to install, and also just sets up Mathematical Modeling with outdoor temperature humidity mostly, and the conduct of indoor sampling humiture is with reference to restrictive condition.
The variable air rate of air-conditioner combines control technology with variable water volume be a large amount of the employing, but the air-conditioner variable air rate, variable water volume, becoming water temperature does not also have in conjunction with the product of controlling.
Building control techniques mode: mainly be external, as johnshen, Honeywell, Siemens, Schneider, international major company such as TAC, these companies since powerful technical research and production capacity the hardware device and the software that constitute central building and control are furtherd investigate, reached the perfect of their hardware device and control system. because the building control appliances is conceived to equipment control, undeniable its energy-conserving action, but, the s operation control of full air-conditioning system there is not deep research because that the product of all building control companies is conceived to the control of hardware device is perfect.
So from central variable air-conditioner system water temperature, become current control, last to unit control with combining of system control, the fusion building control techniques and the air-conditioner host control technology of present neither one integrated intelligent, the product of machine room subsidiary engine control technology.
Now, the production of air-conditioner host equipment and regulation technology are very advanced, as centrifuge VSD are arranged, the steam discharge heat recovery technology; Dual-screw-stem machine generally adopts the electrodeless regulation technology of energy, the lithium bromide machine adopts the proportional integral burner, big multi type air conditioner main flow factory all can reach the requirement of precise figures chemical control system to its equipment, can set the leaving water temperature point by one and reach the most rational accurate control, but leaving water temperature is (to that is to say the cold by artificial setting by artificial outside is given to point value, the parts that can control accurately in its equipment reach the target cold efficiently, but the artificial target cold of setting not is the needed economic cold of air-conditioning system), mostly in variable parameter operation, the evaluation calculation function that itself does not have air conditioner dynamic operation efficiency is artificial rough given leaving water temperature value (somebody is constant for setting leaving water temperature value 1 year) mostly in the reality.Not to the time of uploading, current limit is uploaded variable working condition parameter such as rate and is carried out the Intelligent Dynamic adjusting with indoor and outdoor surroundings variable demand.
With PLC, EDA, PLD, PAC, PC based, the high-end control device of industrial computer are the basis, control to the development of high-end MCS, SCADA, TIA, ERP control technology from low side DDC, DCS, PLC, can satisfy the accurately requirement of control of system height integrated intelligent total digitalization fully, a large amount of computings of digitlization remote collection, control, data of complete multi-state and the hardware condition of processing are provided.Make air-conditioning theory, heat power engineering, theory of mechanics, reach the integrated accurate control of digitlization of central air-conditioning total system integrated intelligent with the control technology binding energy.
On the energy-conservation present domestic market of air-conditioning automatic control system, foreign brand name: Jiang Sen, honeywell, Siemens, TAC etc., mainly with motor-driven valve, PLC, devices such as DDC are sold, the system integration is also mainly at PLC, the parameter monitoring of DDC device, in the remote switch control. air-conditioner host equipment vendor, heating boiler equipment vendor, generally just supply refrigeration and heating equipment, the not integrated control of participation system equipment, control is also mainly monitored at the device parameter of oneself, in the remote switch control, another main cause, each air conditioner, boiler factory, there is separately privately owned communication mode (protool) mostly control equipment commercial city, building, integrated being controlled at just has very big difficulty on the control technology. and present international air-conditioning academia (HVAC) all becomes water temperature certainly, and variable water volume is the feasible solution of air conditioner system energy saving, but from the professional air-conditioning automatic control Jiang Sen of producer, honeywell, Siemens, TAC etc., global maximum air conditioner manufacturer: open profit, the York, Trane, McQuay etc. are just sold with leading products separately and are set out, and have developed some and outdoor temperature change water temperature main control system for referencial use, but it is because uncorrelated with indoor load, in fact, it is few that installation unit uses, the dynamic operation of system-wide parameter, the control that combines of building control and calculator room equipment, intelligent and dynamic becomes water temperature, becomes the control system of current, now, foreign vendor does not also use sample at home.
Domestic no matter air conditioner factory, or automatic control company all still are the main foreign technology that adopts, and integrated control this part does not have enterprise substantially and enters, some automatic control factories are arranged, mainly also be imitated DDC, the PLC device, for air-conditioning control, basically, do not form control theory and system.Some is based on variable water volume, and the blur method of machine room data analysis can not adapt to the reasonable energy-conservation utilization of air-conditioning system plurality of devices in working control, have only the change current, becomes water temperature and could more reasonably be applicable to air conditioner system energy saving in conjunction with the product of controlling.
Summary of the invention
The utility model provides a kind of central air-conditioning digitlization integrated intelligence control system, be adapted to all central air conditioner systems and become current, become the requirement of water temperature in conjunction with control, can according to the central air conditioning equipment energy consumption the final energy relationship that satisfies come all devices of the control and regulation central air conditioner system of economical rationality, reach reasonable energy-conservation purpose.
For solving the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of central air-conditioning digitlization integrated intelligence control system, intelligence operating mode s operation control treatment system link circuit: connect central switch board industrial computer by 485 buses by a plurality of fan coil working condition acquiring processing modules, a plurality of wind cabinet DCS control cabinets connect central switch board industrial computer by 485 buses, a plurality of room conditionings place humiture collection module connects central switch board industrial computer by 485 buses, plural machine room signals collecting case connects central switch board industrial computer by 485 buses, outdoor environment signals collecting case connects central switch board industrial computer by 485 buses, the chilled water pump switch board connects central switch board industrial computer by 485 buses, the cooling water pump switch board connects central switch board industrial computer by 485 buses, and the cooling tower control cabinet connects central switch board industrial computer by 485 buses; Air-conditioner host connects air-conditioner host and regulates control cabinet, and described air-conditioner host is regulated control cabinet and connected the communications bridge connection module by 485 buses, and described communications bridge connection module connects central switch board industrial computer by 485 buses;
Control executive system link circuit: central switch board industrial computer connects the chilled water pump switch board by 485 buses, described chilled water pump switch board connects whole chilled water pumps by low tension loop respectively by power line, central authorities' switch board industrial computer connects wind cabinet DCS control cabinet by 485 buses, described wind cabinet DCS control cabinet connects wind cabinet water valve, air-valve, central authorities' switch board industrial computer is by 485 bus connecting branch temperature PID water valve control cabinets, described arm temperature PID water valve control cabinet connecting branch water valve, central authorities' switch board industrial computer connects differential pressure balancing valve PID control cabinet by 485 buses, described differential pressure balancing valve PID control cabinet connects differential pressure balancing valve, forms chilled water unsteady flow amount control system;
Central authorities' switch board industrial computer connects the cooling water pump switch board by 485 buses, described cooling water pump switch board connects whole cooling water pumps by low tension loop respectively by power line, central authorities' switch board industrial computer connects the cooling tower control cabinet by 485 buses, described cooling tower control cabinet connects whole cooling towers by low tension loop respectively by power line, forms cooling control system;
Central authorities' switch board industrial computer connects the communications bridge connection module, described communications bridge connection module connects air-conditioner host by 485 buses and regulates control cabinet, described air-conditioner host is regulated control cabinet and is connected air-conditioner host by 485 buses, forms air-conditioner host limit efficiency control method control system.
Serial empirical equation performance analysis by in good time dynamic wind fin heat exchange, calculate the real-time wet coefficient ξ that analyses, contact coefficient ES, wind side heat exchange exchange efficiency E, calculate fan coil temperature number TP by the equipment data relevant parameter of determining, water equivalent is counted D, heat transfer units B, calculate at last under in good time environment, satisfy the needed air-conditioning leaving water temperature of air conditioner load in good time, according to system host, end-equipment, the pipe network concrete property, temperature number TP determines minimum backwater water temperature T h, the system water supply amount is limited, calculate the water yield W under the water temperature condition, and set up the relation property database of the interior water yield of fan coil operating mode and differential water pressures △ P, also provide the control reference refrigeration station system water pressure reduction.
Set up intelligent operating mode s operation control treatment system, by fan coil working condition acquiring processing module group, the indoor temperature and humidity sensor group, gather signal and enter industrial computer and machine room signals collecting cabinet sets of signals, outdoor environment signals collecting cabinet sets of signals, the air-conditioner host working condition signal is gathered, control execution group, is connected with the ADO dynamic data, the ODBC/OPC dynamic data exchanges, the interacting operation database of VB data processing operation and integrated configuration is formed intelligent operating mode s operation control treatment system.
Described intelligent operating mode s operation control treatment system is proofreaied and correct water supply water temperature module three parts by fan coil working condition acquiring processing module group, indoor water supply water temperature verification module, the in good time performance analysis of air-conditioner host and operating mode simulation calculating and is formed.
The different situations of the chilled water system variable water volume operating mode that the response of event condition response modes chilled water unsteady flow amount control system is different, and the Mathematical Modeling solution of medelling is arranged by different situations, solve the requirement that may various case adapts to multivariable Control.
The different situations of the cooling water system variable water volume operating mode that the response of event condition response modes Variable Cooling Water Flow amount control system is different, and the Mathematical Modeling solution of medelling is arranged by different situations, solve the requirement that may various case adapts to multivariable Control.
Under the control of intelligence operating mode s operation control treatment system, the output water temperature setting value, air-conditioner host becomes water temperature control, and air-conditioner host is freezed by dynamic actual air-conditioning demand.By the demand cold of air-conditioner host working condition signal, the foundation of efficiency test and appraisal signal and the computing limit efficiency control method of efficiency, on the efficiency simulation calculating basis by refrigeration machine operating mode efficiency curve, draw the control of trend marginal cost, seek the optimum air-conditioner host duty parameter method of operation automatically.
Air-conditioner host limit efficiency control method control system: become water temperature by main frame and regulate, marginal efficiency main frame operation platform numerical control system, marginal efficiency regulating working conditions function is formed.
Described main frame becomes water temperature to be regulated: be exactly under the control of main frame leaving water temperature operational objective temperature value by intelligent operating mode s operation control treatment system, leaving water temperature value TXG by system's dynamic calculation, in certain change width of cloth difference at interval, the leaving water temperature value TXG of output dynamic calculation becomes the leaving water temperature operational objective temperature value of air-conditioner host, becomes manually to be set to dynamic auto setting.
Limit efficiency main frame operation platform numerical control system: on the efficiency simulation calculating basis by refrigeration machine operating mode efficiency curve, satisfying under the terminal demand cold same case of supply, by the efficiency computing of former air-conditioner host load control mode and the comparison operation of efficiency control trend curve, change, change by the emulation refrigerating environment, draw trend marginal cost control minimum operation platform number with operational factor.
Limit efficiency regulating working conditions: on the efficiency simulation calculating basis by refrigeration machine operating mode efficiency curve, satisfying under the terminal demand cold same case of supply, by the efficiency computing of former air-conditioner host load control mode and the comparison operation of efficiency control trend curve, change, change by the emulation refrigerating environment, draw the control of trend marginal cost with operational factor.
The central air-conditioning digitlization integrated intelligence control system that the utility model provides: main frame becomes water temperature and is adjusted in certain change width of cloth difference at interval, the leaving water temperature value TXG of output dynamic calculation becomes the leaving water temperature operational objective temperature value of air-conditioner host, becomes manually to be set to dynamic auto setting;
Limit efficiency main frame operation platform numerical control system is by the efficiency computing (computing of COP value) of former air-conditioner host load control mode and the comparison operation of efficiency control trend curve, change, change by the emulation refrigerating environment with operational factor, draw trend marginal cost control minimum operation platform number, rather than the method for the existing target temperature difference segmentation platform numerical control system that adopts; Limit efficiency regulating working conditions draws the control of trend marginal cost, just corresponding increase reduces cold, and minimizing increases the comparison of power consumption, automatically seeking the optimum method of operation, is exactly to guarantee under the constant prerequisite of supply water temperature point, because after the variation of air-conditioner host running environment, under the computing of efficiency arithmetic system, regulate load factor, thereby the running current restriction reduces the energy consumption of air-conditioner host, reduces the low operating mode of air-conditioner host (low COP) operation, improves the host machine part operating efficiency.
The utility model needs effect (needing indoor temperature and humidity), actual room air-conditioning effect (actual indoor temperature and humidity) from room air conditioner, outdoor temperature humidity, luminosity environment, and the heat exchange operating mode of fan coil, in conjunction with the refrigerant system-head curve, the supply and return water temperature value.By setting up intelligent operating mode s operation control treatment system, intelligent pressure, pressure reduction s operation control treatment system, dynamic in good time computation requirement cold (needing the dynamic needed supply and return water temperature value of room air conditioner effect), the computation requirement water yield is as the calculating benchmark parameter of the accurate control of the reasonable digitlization of air-conditioning system all devices.Accurately determining of this key value, make the key criterion calculating fiducial value of the Frequency Conversion Variable Water Flow adjusting of refrigerant water pump that concrete numerical value in real time arranged accurately, reach the control and regulation effect of reasonable conveying cold (heat), and can be not enough because of the water side water temperature water yield of fan coil (terminal idle call cool equipment), and influence the air-conditioning effect, make the air-conditioner host refrigeratory capacity be tending towards accurate, the unlikely too much very few situation of refrigeratory capacity that occurs, make the needed cold of air-conditioning system consistent with the refrigeratory capacity of main frame, more accurate main control system energy consumes, and cuts the waste.Simultaneously, cooling water pump, the accurate heat radiation of the Frequency Conversion Variable Water Flow of blower fan of cooling tower, variable air rate just has the accurate parameter of calculating according to " Kano refrigeration principle ", makes heat radiation more reasonable.
The variable water volume of terminal air-conditioner, variable air rate, the control of change water temperature have also had the control reference, make the control of terminal air-conditioner more reasonable.
The main frame efficiency evaluation system of setting up (Cop value is calculated in good time) in conjunction with used air-conditioner host factory by GB T8097 standard the P-H(pressure enthalpy of the actual working medium that should provide), T-S(temperature entropy), the operational data storehouse set up of refrigerating capacity/measure hard performance chart towards the dynamic event process.Under the condition of the accurate cold of the in good time demand of described in front calculations of air conditioner system, air-conditioner host is lower than the unreasonable operating mode of the COP value under the corresponding evaporative condenser condition, by the utility model system and device output current limit, upload the time, upload rate, analog quantitys such as qualification supply water temperature width of cloth difference are given air-conditioner host, reduce power consumption, the comprehensive refrigerating efficiency under the corresponding raising air-conditioner host sub-load.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing:
1, energy-saving equipment control system network function district figure.
2, energy-saving equipment control system network.
3, energy-saving equipment control system schematic diagram.
4, fan coil working condition acquiring processing module schematic diagram.
5, fan coil working condition acquiring processing module structure chart.
6, intelligent operating mode s operation control treatment system structure chart.
7, machine room signal acquisition module structure chart.
8, outdoor signal acquisition module structure chart.
9, chilled water pump control treatment system structure chart.
10, cooling water pump control treatment system structure chart.
11, room conditioning place humiture collection module group structure chart.
12, freezing unsteady flow volume dynamic fuzzy control logic figure.
13, cooling unsteady flow volume dynamic fuzzy control logic figure.
14, chilled water unsteady flow amount air-conditioning equipment connection layout.
15, chilled water unsteady flow amount control appliance connection layout.
16, Variable Cooling Water Flow amount air-conditioning equipment connection layout.
17, Variable Cooling Water Flow amount control appliance connection layout.
18, cooling tower control treatment system structure chart.
19, component names explanation chart.
Part description: 1, the central switch board of full intelligent digital, 2, the chilled water pump switch board, 3, the cooling water pump switch board, 4, the cooling tower switch board, 5, air-conditioner host is regulated switch board, 6, the fan coil signal acquisition module, 7, the indoor temperature and humidity collector, 8, the outdoor temperature humidity sensor, 9, outdoor luminosity sensor, 10, electrical quantity sensor, 11, flow sensor, 12, air-conditioner host, 13, chilled water pump, 14, cooling water pump, 15, cooling tower, 16, fan coil (room air conditioner), 17, automatic differential-pressure bypass valve, 18, machine room signals collecting case, 19, the outdoor signal vasculum, 20, the recuperation of heat control cabinet, 21, the communications bridge connection module, 22, the PID motor-driven valve, 23, water valve PID temperature-controlled cabinet, 24, fan coil (wind cabinet) signal acquisition process module, 25, the chilled water pump frequency converter, 26, chilled water pump starts cabinet, 27, the pressure balance control cabinet, 28, wind cabinet DCS control cabinet.
The specific embodiment
A kind of central air-conditioning digitlization integrated intelligence control system, intelligence operating mode s operation control treatment system link circuit: connect central switch board industrial computer 1 by 485 buses by a plurality of fan coil working condition acquiring processing modules 6, a plurality of wind cabinet DCS control cabinets connect central switch board industrial computer 1 by 485 buses, a plurality of room conditionings place humiture collection module 7 connects central switch board industrial computer 1 by 485 buses, plural machine room signals collecting case 18 connects central switch board industrial computer 1 by 485 buses, outdoor environment signals collecting case 19 connects central switch board industrial computer 1 by 485 buses, chilled water pump switch board 2 connects central switch board industrial computer 1 by 485 buses, cooling water pump switch board 3 connects central switch board industrial computer 1 by 485 buses, and cooling tower control cabinet 4 connects central switch board industrial computer 1 by 485 buses; Air-conditioner host 12 connects air-conditioner host and regulates control cabinet 5, and described air-conditioner host is regulated control cabinet 5 and connected communications bridge connection module 21 by 485 buses, and described communications bridge connection module 21 connects central switch board industrial computer 1 by 485 buses.
Control executive system link circuit: central switch board industrial computer 1 connects chilled water pump switch board 2 by 485 buses, described chilled water pump switch board 2 connects whole chilled water pumps 13 by low tension loop respectively by power line, central authorities' switch board industrial computer 1 connects wind cabinet DCS control cabinet by 485 buses, described wind cabinet DCS control cabinet connects wind cabinet water valve, air-valve, central authorities' switch board industrial computer 1 is by 485 bus connecting branch temperature PID water valve control cabinets, described arm temperature PID water valve control cabinet connecting branch water valve, central authorities' switch board industrial computer 1 connects differential pressure balancing valve PID control cabinet by 485 buses, described differential pressure balancing valve PID control cabinet connects differential pressure balancing valve, forms chilled water unsteady flow amount control system.
Central authorities' switch board industrial computer 1 connects cooling water pump switch board 3 by 485 buses, described cooling water pump switch board 3 connects whole cooling water pumps 14 by low tension loop respectively by power line, central authorities' switch board industrial computer 1 connects cooling tower control cabinet 4 by 485 buses, described cooling tower control cabinet 4 connects whole cooling towers 15 by low tension loop respectively by power line, forms cooling control system.
Central authorities' switch board industrial computer 1 connects communications bridge connection module 21, described communications bridge connection module 21 connects air-conditioner host by 485 buses and regulates control cabinet 5, described air-conditioner host is regulated control cabinet 5 and is connected air-conditioner host 12 by 485 buses, forms air-conditioner host limit efficiency control method control system.
Serial empirical equation performance analysis by in good time dynamic wind fin heat exchange, calculate the real-time wet coefficient ξ that analyses, contact coefficient ES, wind side heat exchange exchange efficiency E, calculate fan coil temperature number TP by the equipment data relevant parameter of determining, water equivalent is counted D, heat transfer units B, calculate at last under in good time environment, satisfy the needed air-conditioning leaving water temperature of air conditioner load in good time, according to system host, end-equipment, the pipe network concrete property, temperature number TP determines minimum backwater water temperature T h, the system water supply amount is limited, calculate the water yield W under the water temperature condition, and set up the relation property database of the interior water yield of fan coil operating mode and differential water pressures △ P, also provide the control reference refrigeration station system water pressure reduction.
Set up intelligent operating mode s operation control treatment system, by fan coil working condition acquiring processing module group 6, indoor temperature and humidity sensor group 7, gather signal and enter industrial computer and machine room signals collecting cabinet sets of signals 18, outdoor environment signals collecting cabinet sets of signals 19, the collection of air-conditioner host working condition signal, control execution group are connected with the ADO dynamic data, the ODBC/OPC dynamic data exchanges, the interacting operation database of VB data processing operation and integrated configuration is formed intelligent operating mode s operation control treatment system.
Described intelligent operating mode s operation control treatment system is proofreaied and correct water supply water temperature module three parts by fan coil working condition acquiring processing module group, indoor water supply water temperature verification module, the in good time performance analysis of air-conditioner host and operating mode simulation calculating and is formed.
The different situations of the chilled water system variable water volume operating mode that the response of event condition response modes chilled water unsteady flow amount control system is different, and the Mathematical Modeling solution of medelling is arranged by different situations, solve the requirement that may various case adapts to multivariable Control.
The different situations of the cooling water system variable water volume operating mode that the response of event condition response modes Variable Cooling Water Flow amount control system is different, and the Mathematical Modeling solution of medelling is arranged by different situations, solve the requirement that may various case adapts to multivariable Control.
Under the control of intelligence operating mode s operation control treatment system, the output water temperature setting value, air-conditioner host becomes water temperature control, and air-conditioner host is freezed by dynamic actual air-conditioning demand.By the demand cold of air-conditioner host working condition signal, the foundation of efficiency test and appraisal signal and the computing limit efficiency control method of efficiency, on the efficiency simulation calculating basis by refrigeration machine operating mode efficiency curve, draw the control of trend marginal cost, seek the optimum air-conditioner host duty parameter method of operation automatically.
Air-conditioner host limit efficiency control method control system: become water temperature by main frame and regulate, marginal efficiency main frame operation platform numerical control system, marginal efficiency regulating working conditions function is formed.
Described main frame becomes water temperature to be regulated: be exactly under the control of main frame leaving water temperature operational objective temperature value by intelligent operating mode s operation control treatment system, leaving water temperature value TXG by system's dynamic calculation, in certain change width of cloth difference at interval, the leaving water temperature value TXG of output dynamic calculation becomes the leaving water temperature operational objective temperature value of air-conditioner host, becomes manually to be set to dynamic auto setting.
Limit efficiency main frame operation platform numerical control system: on the efficiency simulation calculating basis by refrigeration machine operating mode efficiency curve, satisfying under the terminal demand cold same case of supply, by the efficiency computing of former air-conditioner host load control mode and the comparison operation of efficiency control trend curve, change, change by the emulation refrigerating environment, draw trend marginal cost control minimum operation platform number with operational factor.
Limit efficiency regulating working conditions: on the efficiency simulation calculating basis by refrigeration machine operating mode efficiency curve, satisfying under the terminal demand cold same case of supply, by the efficiency computing of former air-conditioner host load control mode and the comparison operation of efficiency control trend curve, change, change by the emulation refrigerating environment, draw the control of trend marginal cost with operational factor.
The utility model is by instruction, data acquisition computing output, and control operating part two major parts are formed; Two major parts again by various independently, related module, subsystem form.
Instruction, data acquisition computing output have: fan coil working condition acquiring processing module 6, as Fig. 4; By fan coil air intake aerial temperature and humidity sensor, air-out aerial temperature and humidity sensor, air-conditioning field of employment aerial temperature and humidity sensor; The water inlet temperature sensor, the water outlet cooling-water temperature sensor, the Inlet and outlet water pressure sensor, Analog Data Acquistion Module, the communications bridge connection module, wireless data transmission module is formed.Fan coil (wind cabinet) working condition acquiring processing module 6; By air intake aerial temperature and humidity sensor, air-conditioning field of employment aerial temperature and humidity sensor; The water inlet temperature sensor, the water outlet cooling-water temperature sensor, the Inlet and outlet water pressure sensor, the DCS acquisition control module, the communications bridge connection module, wireless data transmission module is formed.Form fan coil (comprising various room air conditioners) working condition acquiring processing module group by the fan coil working condition acquiring processing module more than three.
Room conditioning place humiture collection module is by the humiture collection module, the communications bridge connection module, and wireless data transmission module is formed.
Machine room signal acquisition module 18 is by the chilled water flow quantity sensor, the main frame electrical quantity sensor, and multiple pressure of supply water sensor, multiple water temperature sensor, 485 communication simulation amount acquisition modules are formed.
Outdoor environment signals collecting cabinet collection number group 19 is by the outdoor temperature humidity sensor, outdoor luminosity sensor, and 485 communication simulation amount acquisition modules are formed.
The signals collecting of air-conditioner host is by air-conditioner host communicator 18, air-conditioner host controller 12, and the plc communication bridger, air-conditioner host communications bridge connection module, communication protocol interconnecting module 21, industrial computer is formed.
Intelligence operating mode s operation control treatment system: enter industrial computer and machine room signals collecting cabinet sets of signals 18 by fan coil (comprising various room air conditioners) working condition acquiring processing module group 6 and indoor temperature and humidity sensor group 7, collection signal, outdoor environment signals collecting cabinet sets of signals 19, the collection of air-conditioner host working condition signal, control execution group are connected with the ADO dynamic data, the ODBC/OPC dynamic data exchanges, the interacting operation database of VB data processing operation and integrated configuration is formed intelligent operating mode s operation control treatment system.
The control operating part has: chilled water unsteady flow amount control system equipment, and cooling control system equipment, the air-conditioner host control system equipment is formed.
Chilled water unsteady flow amount control system equipment: by chilled water pump control treatment system, bypass water valve unsteady flow amount control cabinet 27, bye-pass water valve temperature PID makes case 23, and wind cabinet DSS control cabinet 28 is formed.
Chilled water pump control treatment system is pressed the logic control of event condition response modes chilled water unsteady flow amount control system.By 485 communication I/O data acquisition control output modules, be used to control frequency converter 2 operations after the output, variable frequency pump 13 drops into the platform numbers, the input platform number of main frequency water pump 13 ', I/O signal feedback such as fault alarm are given industrial computer; 485 communication simulation amount output modules are used to export the frequency of control frequency converter frequency conversion, and 485 communication switch amount output modules are used to control power frequency/frequency conversion by turns, frequency converter, general pump input, the actuating signal that stops.
Bypass water valve unsteady flow amount control cabinet 27: provide setting pressure reduction by intelligent operating mode s operation control treatment system, actual pressure differential PV value is controlled with setting SV value composition PID, regulates the switch ratio of differential pressure balancing valve.
Bye-pass water valve temperature PID control cabinet 23: provide the setting return water temperature by intelligent operating mode s operation control treatment system, actual temperature of return water PV value is controlled with setting SV value composition PID, regulates the switch ratio of arm water valve.
Wind cabinet DCS control cabinet 28: provide the setting return water temperature by intelligent operating mode s operation control treatment system, actual temperature of return water PV value is controlled with setting SV value composition PID, regulates the switch ratio of wind cabinet water valve.
Cooling control system: cooling control system is controlled treatment system by cooling water pump, and the cooling tower control system is formed.
Cooling water pump control treatment system is pressed the logic control of event condition response modes Variable Cooling Water Flow amount control system.By 485 communication I/O data acquisition control output modules, be used to control frequency converter 3 operations after the output, variable frequency pump 14 drops into the platform numbers, the input platform number of main frequency water pump 14 ', I/O signal feedback such as fault alarm are given industrial computer; 485 communication simulation amount output modules are used to export the frequency of control frequency converter frequency conversion, and 485 communication switch amount output modules are used to control power frequency/frequency conversion by turns, frequency converter, general pump input, the actuating signal that stops.
Cooling tower control treatment system is pressed the logic control of event condition response modes Variable Cooling Water Flow amount control system.By 485 communication I/O data acquisition control output modules, be used to control frequency converter 4 operations after the output, frequency conversion fan 15 drops into the platform numbers, the input platform number of power frequency blower fan 15 ', the switch control of corresponding water valve, I/O signal feedback such as fault alarm are given industrial computer; 485 communication simulation amount output modules are used to export the frequency of control frequency converter frequency conversion, and 485 communication switch amount output modules are used to control power frequency/frequency conversion by turns, frequency converter, power frequency blower fan input, the actuating signal that stops.
The air-conditioner host control system becomes water temperature and platform number by intelligent operating mode s operation control treatment system, air-conditioner host limit efficiency control method control carrying out main frame, and marginal efficiency is regulated.By communications bridge connection module 21, air-conditioner host control cabinet 5, air-conditioner host 12 is formed.
The operation principle of the utility model device is as follows:
(this device adopts the EDC programming device to fan coil working condition acquiring processing module group, 8UI/2AO, 5DI/4DO) the 6 turnover wind-warm syndrome humidity of gathering fan coil, the Inlet and outlet water temperature, Inlet and outlet water pressure reduction, by wind fin heat exchange experience company: calculate real-time wet coefficient ξ, the contact coefficient ES of analysing, wind side heat exchange exchange efficiency E, by the accurate number TP of equipment data relevant parameter accounting temperature that determines, water equivalent is counted D, heat transfer units B, calculate the water yield W under the water temperature condition, and set up the relation property database of the interior water yield of fan coil operating mode and differential water pressures △ P.
(comprise that T-S calculates by the VB programming ACCESS database of setting up, dew-point temperature is calculated, psychrometric chart calculates) we can be to the fan coil wind pushing temperature of this air-conditioning system of using, return air temperature, Inlet and outlet water pressure, use the conditioned area humiture, the data opening relationships of pressure reduction under different operating modes, thereby determine: the needed air-conditioning supply water temperature of indoor temperature that needs, the accessible conditioned area indoor temperature of institute's supply water temperature, humidity range makes the cold consumption economical rationality of air-conditioning system.
Calculate under the in good time dynamic environment by outdoor environment signals collecting case 19, under in good time environment, air-conditioning system satisfy different fields of employment air-conditioning effect (humiture) the air-conditioning feed temperature value that should provide.Indoor temperature and humidity collector 7 compares according to the air-conditioning effect (humiture) of real-time various air-conditionings field of employment and the comfort requirement of various different places, and the air-conditioning feed temperature value of fan coil working condition acquiring processing module group 6 is revised.
Empirical equation: TMS=TW-(TW-TNS)/E+(TNS-T0)
TMS, TW, TNS, E, T0-calculating feed temperature, outdoor temperature, setting indoor temperature, exchange efficiency, indoor temperature in real time.
By the VB programming ACCESS database of setting up, ADO event response relevant database, we can be to this air-conditioning system difference fields of employment of using, and the response of the timely servo-actuated of air-conditioning effect of this air-conditioning system least favorable use, to difference towards the air-conditioning field of employment, different outdoor temperature humidities respond, and according to the supply and return water temperature that detects, for pressure of return water, the real-time actual temperature-humidity signal of field of employment, compare according to the different fields of employment indoor temperature and humidity of setting and the real-time indoor temperature and humidity of actual sensing collection, and according to the heat exchange operating mode calculating water temperature that should supply water of breaking, and detect real-time actual temperature of supply water, calculation correction feedwater water temperature value.
The correction that air-conditioner host working condition signal, efficiency test and appraisal signal feed back air-conditioning feed temperature value by the computing of demand cold and efficiency, the execution value that feedwater is set as system, and constantly carry out feedback compensation.
Feedwater water temperature T XG is that the in good time dynamic load of air-conditioning reaches the needed control parameter point of room conditioning effect, according to system host, end-equipment, the pipe network concrete property, temperature number TP, also just can determine minimum backwater water temperature T h, satisfy institute's relevant database of the detection fan coil water yield (pressure reduction) in good time, the system water supply amount has also just been had restriction relation by system's water yield (pressure reduction).
By the VB programming ACCESS database of setting up, ADO event response relevant database, odbc database based on exchanges data, and the various communication function bridge modules that really can reach transparent communication, gather the operating condition parameter of air-conditioner host, by the in good time operating mode of air-conditioner host is carried out the efficiency analysis, demand cold simulation calculating, the water supply water temperature is optimized adjusting, and it is warm as the in good time setting operation water supply water temperature of moving of air-conditioner host that optimized equipment is supplied water, and makes the operational efficiency of air-conditioner host the most reasonable.
Under the control of above intelligent operating mode s operation control treatment system: the output water temperature setting value, air-conditioner host is freezed by dynamic actual air-conditioning demand, the operating condition performance curve of simultaneous adaptation air-conditioner host economy reduces the consumption of air-conditioner host.Satisfy the needs of room conditioning effect in good time.
By the demand cold of air-conditioner host working condition signal, the foundation of efficiency test and appraisal signal and the computing limit control method of efficiency, can constantly regulate the air-conditioner host efficiency, reduce the low operating mode operation of air-conditioner host relatively, corresponding saving air-conditioner host energy.
The control procedure of air-conditioner host is mainly reflected in: air-conditioner host becomes water temperature control and air-conditioner host limit efficiency control method
Air-conditioner host becomes water temperature control: under the control of intelligent operating mode s operation control treatment system, calculating feedwater water temperature T XG by system, in certain change width of cloth difference at interval, the output water temperature setting value becomes the operational objective temperature value of air-conditioner host, thereby changes the output cold and the consumed energy of air-conditioner host.For the main frame that has backwater difference efficiency to regulate, become the leaving water temperature that air-conditioner host is not only controlled in water temperature control, in conjunction with the temperature difference energy of main frame than also controlling backwater.
Air-conditioner host limit efficiency control method is exactly: on the efficiency simulation calculating basis by refrigeration machine operating mode efficiency curve, satisfying under the terminal demand cold same case of supply, by the efficiency computing (computing of COP value) of former air-conditioner host load control mode and the comparison operation of efficiency control trend curve, change by the emulation refrigerating environment, change with operational factor, draw the control of trend marginal cost, just corresponding increase reduces cold, and minimizing increases the comparison of power consumption, automatically seek the optimum method of operation, be exactly to guarantee under the constant prerequisite of supply water temperature point, because after the variation of air-conditioner host running environment, under the computing of efficiency arithmetic system, regulate load factor, thereby the running current restriction reduces the energy consumption of air-conditioner host., reduce the low operating mode of air-conditioner host (low COP) operation, improve the host machine part operating efficiency.
Chilled water unsteady flow amount control procedure: chilled water pump variable flow just, wind cabinet PID water valve, arm temperature PID water valve, the course of work of differential pressure balancing valve PID water valve unsteady flow amount.
The chilled water pump variable flow is controlled according to event condition response modes chilled water unsteady flow amount control system logic: be exactly the different situations that respond different chilled water system variable water volume operating modes, and the Mathematical Modeling solution of medelling is arranged by different situations, solve the requirement that may various case adapts to multivariable Control.
The case condition is at first judged by system, a1 class: the minimum pressure reduction of coil pipe pipeline current that is exactly certain operating mode lower end fan coil heat exchange of intelligent operating mode s operation control treatment system calculating, support the minimum discharge that unsteady flow amount main frame and non-unsteady flow amount main process equipment are set, the limits value of pressure reduction.B1 class: be exactly the return water temperature restriction point that intelligent operating mode s operation control treatment system is calculated.
Carry cold (heat) system to blur the control of deriving substantially: be exactly by gathering the supply and return water temperature of refrigeration station, for pressure of return water, chilled-water flow, outdoor temperature humidity, indoor temperature and humidity, statistics and relevant operation of air conditioner managerial experiences are concluded through fuzzy, sharpening is handled, foundation is benchmark with the temperature difference, and pressure reduction is the relation property Mathematical Modeling of restrictive condition, and by refrigeration station pressure, temperature, the corresponding derivation of flow signal are determined certain limit value correction (seeing Figure 12).
Mainly concern, and by regression analysis, it is reasonable that data feedback modifiers to chilled water is carried according to the data acquisition at air-condition freezing station and the fuzzy derivation function of indoor and outdoor parameter opening relationships type.
Water pump unsteady flow amount is just under the control signal effect, by the extremely high frequency of lowest frequency, high frequency can not satisfy traffic requirement, then drop into a frequency conversion again, then by calculated rate to the most frequently, when high frequency can not satisfy traffic requirement, then drop into a main frequency water pump again, then again by new calculated rate until satisfying traffic requirement, otherwise, then undertaken by opposite direction.
The control of wind cabinet DSC switch board PID water valve is an important control action of DCS wind cabinet controller, is the return water temperature restriction point of being calculated by intelligent operating mode s operation control treatment system.
Differential-pressure bypass valve switch board PID water valve control, the refrigeration station pressure differential resetting value of being calculated by intelligent operating mode s operation control treatment system (being higher than air-conditioner host safety pressure difference)
The control of chilled water variable flow system: be exactly under the intelligent operating mode s operation control treatment system control based on fan coil working condition acquiring processing module group, limit wind cabinet PID water valve, arm temperature PID water valve, the SV setup parameter of differential pressure balancing valve PID water valve, the temperature of each PID unit, pressure reduction input quantity and setup parameter are carried out the switch ratio that water valve is regulated in PID control output.Press event condition response modes chilled water unsteady flow amount control system method control water pump unsteady flow amount (frequency conversion becomes operation platform number).
The cooling control system control procedure: be exactly under the control of event condition response modes Variable Cooling Water Flow amount control system control logic, the cooling water pump control treatment system course of work, the cooling tower control system course of work is formed
At first judge the case condition, the a1 class: be exactly air-conditioning type exhaust steam pressure limits value.Be by air-conditioner host limit efficiency control method system, in conjunction with setting value by determining on the efficiency simulation calculating basis of refrigeration machine operating mode efficiency curve.
The b1 class: being exactly the condensation temperature limits value that air-conditioner host limit efficiency control method is provided, is by air-conditioner host limit efficiency control method system, in conjunction with the setting value by determining on the efficiency simulation calculating basis of refrigeration machine operating mode efficiency curve.
C1 class: be exactly the limits value Pe of cooling tower water distribution hydraulic pressure overbottom pressure value under different operating modes.Be by air-conditioner host limit efficiency control method system, in conjunction with setting value by determining on the efficiency simulation calculating basis of refrigeration machine operating mode efficiency curve.
Cooling control system blurs the control of deriving substantially: be exactly by gathering the cooling supply and return water temperature of air conditioner, cooling is for pressure of return water, outdoor temperature humidity, statistics and relevant operation of air conditioner managerial experiences, conclude through fuzzy, sharpening is handled, and setting up with the temperature difference is benchmark, and return water temperature is the relation property Mathematical Modeling (seeing Figure 13) of restrictive condition.
The control of Variable Cooling Water Flow amount system: press event condition response modes Variable Cooling Water Flow amount control system method control water pump unsteady flow amount (frequency conversion becomes operation platform number), blower fan of cooling tower variable air rate (frequency conversion becomes operation platform number).Each variable increment at first increases air quantity to calculated value by the cooling tower variable air rate, do not reach and then increase the cooling water pump variable water volume, to the variable frequency pump peak frequency, do not reach and then add cooling tower variable air rate increase air quantity again to calculated value, not reaching then increases a cooling water pump variable water volume again, by calculated rate to high frequency, when high frequency can not satisfy traffic requirement, then drop into a typhoon machine again, so until reaching calculated value.
The cooling water pump variable water volume, under the control signal effect, after accepting a grade cooling tower signal, by the extremely high frequency of lowest frequency, high frequency can not satisfy the heat radiation requirement, then give two grade cooling tower signal frequency conversions, after accepting two grade cooling tower signals, the frequency conversion of secondary cooling water pump is by the calculated rate tremendously high frequency, when high frequency can not satisfy heat radiation and requires, then give three grade cooling tower signal frequency conversions, after accepting three grade cooling tower signals, three grades of cooling water pump frequency conversions are by new calculated rate tremendously high frequency, until satisfying the heat radiation requirement, otherwise, then undertaken by opposite direction.
When air-conditioner host and cooling water system corresponding relation, then cooling water pump frequency conversion, blower fan of cooling tower, water valve and main frame interlock, control logic is also pressed event condition response modes Variable Cooling Water Flow amount control system method control pump variable frequency, fan frequency conversion, the switch of water valve.
Cooling water pump, blower fan of cooling tower are the one that connects each other, control frequency modulation mutually; Be in order to guarantee that the caloric requirement that main frame sheds regulates.Carry out variable frequency adjustment by analog quantity, the cooling tower relative priority; In servicely be subjected to associated change parameter control to carry out ambiguity correction to regulate.The cooling tower ambiguity correction is regulated the control that also is subjected to outdoor temperature humidity sensor and cooling tower performance curve result of calculation simultaneously and is carried out ambiguity correction and regulate.
Claims (5)
1. central air-conditioning digitlization integrated intelligence control system, it is characterized in that: intelligent operating mode s operation control treatment system link circuit: fan coil working condition acquiring processing module (6) connects central switch board industrial computer (1), wind cabinet DCS control cabinet connects central switch board industrial computer (1), room conditioning place humiture collection module (7) connects central switch board industrial computer (1), machine room signals collecting case (18) connects central switch board industrial computer (1), outdoor environment signals collecting case (19) connects central switch board industrial computer (1), chilled water pump switch board (2) connects central switch board industrial computer (1), cooling water pump switch board (3) connects central switch board industrial computer (1), and cooling tower control cabinet (4) connects central switch board industrial computer (1); Air-conditioner host (12) connects air-conditioner host and regulates control cabinet (5), and described air-conditioner host is regulated control cabinet (5) and connected communications bridge connection module (21), and described communications bridge connection module (21) connects central switch board industrial computer (1);
Control executive system link circuit: central switch board industrial computer (1) connects chilled water pump switch board (2), described chilled water pump switch board (2) connects whole chilled water pumps (13) by low tension loop respectively by power line, central authorities' switch board industrial computers (1) connect wind cabinet DCS control cabinet, described wind cabinet DCS control cabinet connects wind cabinet water valve, air-valve, switch board industrial computer (1) the connecting branch temperature PID of central authorities water valve control cabinet, described arm temperature PID water valve control cabinet connecting branch water valve, central authorities' switch board industrial computers (1) connect differential pressure balancing valve PID control cabinet, described differential pressure balancing valve PID control cabinet connects differential pressure balancing valve, forms chilled water unsteady flow amount control system;
Central authorities' switch board industrial computers (1) connect cooling water pump switch board (3), described cooling water pump switch board (3) connects whole cooling water pumps (14) by low tension loop respectively by power line, central authorities' switch board industrial computers (1) connect cooling tower control cabinet (4), described cooling tower control cabinet (4) connects whole cooling towers (15) by low tension loop respectively by power line, forms cooling control system;
Central authorities' switch board industrial computers (1) connect communications bridge connection module (21), described communications bridge connection module (21) connects air-conditioner host and regulates control cabinet (5), described air-conditioner host is regulated control cabinet (5) and is connected air-conditioner host (12), forms air-conditioner host limit efficiency control method control system.
2. according to the described a kind of central air-conditioning digitlization integrated intelligence control system of claim 1, it is characterized in that: described fan coil working condition acquiring processing module (6) is for a plurality of.
3. according to the described a kind of central air-conditioning digitlization integrated intelligence control system of claim 1, it is characterized in that: described wind cabinet DCS control cabinet is a plurality of.
4. according to the described a kind of central air-conditioning digitlization integrated intelligence control system of claim 1, it is characterized in that: described room conditioning place humiture collection module (7) is for a plurality of.
5. according to the described a kind of central air-conditioning digitlization integrated intelligence control system of claim 1, it is characterized in that: described machine room signals collecting case (18) is at least two.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103604470A (en) * | 2013-12-10 | 2014-02-26 | 国家电网公司 | Method for measuring fan flow in real time according to DCS (distributed control system) data |
| CN105091439A (en) * | 2014-05-07 | 2015-11-25 | 苏州必信空调有限公司 | Computing method of refrigerating capacity and refrigerating efficiency of oil-free refrigerating system and refrigerating system |
| CN105987486A (en) * | 2014-10-15 | 2016-10-05 | 欧姆龙株式会社 | Heat demand estimation device and method, facility control device, method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103604470A (en) * | 2013-12-10 | 2014-02-26 | 国家电网公司 | Method for measuring fan flow in real time according to DCS (distributed control system) data |
| CN105091439A (en) * | 2014-05-07 | 2015-11-25 | 苏州必信空调有限公司 | Computing method of refrigerating capacity and refrigerating efficiency of oil-free refrigerating system and refrigerating system |
| CN105091439B (en) * | 2014-05-07 | 2017-06-30 | 苏州必信空调有限公司 | The computational methods and refrigeration system of oil-free refrigerant system capacity and refrigerating efficiency |
| CN105987486A (en) * | 2014-10-15 | 2016-10-05 | 欧姆龙株式会社 | Heat demand estimation device and method, facility control device, method and system |
| CN106196515A (en) * | 2016-08-31 | 2016-12-07 | 深圳达实智能股份有限公司 | The energy efficiency controlling method of central air conditioner system and device |
| CN108241295A (en) * | 2016-12-23 | 2018-07-03 | Abb股份公司 | For the adaptive modeling method and system of the building energy control based on MPC |
| CN106931592A (en) * | 2017-03-06 | 2017-07-07 | 湖北卓立集控智能技术有限公司 | A kind of device for tail end of central air conditioner air-conditioner performance analysis |
| CN109425054A (en) * | 2017-06-26 | 2019-03-05 | 群光电能科技股份有限公司 | Adjustment system |
| CN109425054B (en) * | 2017-06-26 | 2021-08-24 | 群光电能科技股份有限公司 | Adjustment system |
| CN109324522A (en) * | 2018-09-30 | 2019-02-12 | 西安建筑科技大学 | Central air-conditioning analogue system and method based on colony intelligence construction platform proof of algorithm |
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