CN102147146B - 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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- CN102147146B CN102147146B CN 201110101329 CN201110101329A CN102147146B CN 102147146 B CN102147146 B CN 102147146B CN 201110101329 CN201110101329 CN 201110101329 CN 201110101329 A CN201110101329 A CN 201110101329A CN 102147146 B CN102147146 B CN 102147146B
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Abstract
The invention discloses a digital integrated intelligent control system of a central air conditioner and an adjusting method thereof. The invention has the key technology that: an intelligent working condition operation control processing system is established, timely dynamic water supply temperature of the air-conditioning system is accurately calculated, and the intelligent working condition operation control processing system consists of three parts, namely a fan coil working condition acquisition processing module, an indoor water supply temperature verification module and a simulating operation correcting power supply temperature module. An air-conditioning host performs refrigeration according to the dynamic practical air-conditioning requirement under the control of the intelligent working condition operation control processing system, meanwhile, an economic operating condition performance curve of the air-conditioning host is adapted, the consumption of the air-conditioning host is reduced, and the requirement of the indoor air-conditioning effect is timely met. By an operation margin adjusting method of demanded cold quantity and energy efficiency established according to working condition signals and energy efficiency assessment signals of the air-conditioning host, the energy efficiency of the air-conditioning host can be continually adjusted, the low working condition operation of the air-conditioning host is relatively reduced, and the energy used by the air-conditioning host is correspondingly saved.
Description
Technical field
The present invention relates to a kind of digital integrated intelligent control system of central air-conditioner and control method thereof, belong to the air conditioner energy saving field.
Background technology
Existing central air-conditioning control device is controlled from system, only has the change water temperature on final essential technique, becomes two kinds of modes of current.Control from the end air-conditioner and also only have variable air rate, variable water volume (change current) becomes water temperature three aspects. on technical foundation, building prosecutor formula is arranged, the Industry Control mode.
The change of technique that becomes current is more, and is mainly various energy-conservation companies, on its control technology, mainly with DDC, DCS, PLC, MES control technology means are the basis, are conceived to the calculator room equipment water pump and control, take the outdoor environment humiture as fuzzy reference, 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 variable-flow is regulated and controlled; By the temperature for backwater, the temperature difference affects air-conditioner host, the key calculating standard volume of its frequency conversion, variable-flow 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 the accurate Calculation controlling value that changes with refrigeration duty of the central air conditioner system that adapts to real-time transition.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, subsidiary engine equipment, air-conditioner host, system pipe network connect the accurate control relation of real-time transition each other.The accurate Calculation that there is no the demand cold, just can not reach conditioner equipment: end is with cool equipment (directly controlling air-conditioning effect), the refrigerant water pump, cooling water pump, blower fan of cooling tower, the efficiency of the precision digitization association of the interconnection operating modes such as air conditioner refrigerating main frame is regulated and is controlled, CN1375665A, CN1415915, CN200880010537.9,200620123889.3 disclosed be exactly such device.There is no the accurate crucial calculating parameter of system-demand cold (dynamic demand supply and return water temperature value), this error of controlling the pass key value is the key of system energy conservation control for central air-conditioning success or failure, also energy efficiency of equipment than the key of controlling. the also with good grounds machine room variation of water temperature of in good time feeding water, the derive method of feedwater water temperature of next demand of reference statistical data, 200820080180.9 be exactly this method, obviously, this is not the method for feedwater water temperature of directly calculating by the dynamic actual load of air-conditioning.
Becoming the water temperature technology, due to the control based on air-conditioner host, is that air-conditioning production plant adopts mostly, considers owing to installing, and mostly also just sets up Mathematical Modeling with outdoor temperature humidity, indoor sampling humiture only conduct with reference to restrictive condition.
The variable air rate of air-conditioner is combined 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: be mainly external, as johnshen, Honeywell, Siemens, Schneider, the international major company such as TAC, these companies are because powerful technical research and production capacity conduct in-depth research hardware device and the software that consists of central building and control, reached the perfect of their hardware device and control system. because being conceived to equipment, building control device controls, undeniable its energy-conserving action, but the control that is conceived to hardware device due to the product of all building control companies is perfect, and the s operation control of full air-conditioning system is not had deep research.
So from central variable air-conditioner system water temperature, become current and control, to unit control with system control in conjunction with upper, fusion building control techniques and the air-conditioner host control technology of neither one integrated intelligent at present, 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, lithium bromide machine adoption rate integration burner, large multi type air conditioner main flow factory all can reach to its equipment the requirement that precision digitization is controlled, 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 there is no air conditioner dynamic operation efficiency, artificial rough given leaving water temperature value (somebody is constant for setting leaving water temperature value 1 year) mostly in reality.Not to the time of uploading, limit electric current, upload the variable working condition parameter such as rate and carry out the Intelligent Dynamic adjusting with the 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 requirement that system height integrated intelligent total digitalization is accurately controlled 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, the digital integration that can reach the conditioner integrated intelligent of being combined with control technology is accurately controlled.
on the energy-conservation present domestic market of automatic control system of air conditioner, foreign brand name: Jiang Sen, honeywell, Siemens, TAC etc., mainly with motor-driven valve, PLC, the devices such as DDC are sold, the system integration is also mainly at PLC, the parameter monitoring of DDC device, remote switch is controlled. air-conditioner host equipment vendor, heating boiler equipment vendor, generally just supply refrigeration and heating equipment, do not participate in the integrated control of system equipment, control also and mainly monitor at the device parameter of oneself, on remote switch is controlled, 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 large difficulty on control technology. and present international air-conditioning academia (HVAC) all becomes water temperature certainly, variable water volume is the feasible solution of air conditioner system energy saving, but from the professional Air-conditioning Jiang Sen of producer, honeywell, Siemens, TAC etc., the maximum air conditioner manufacturer in the whole world: open profit, the York, the Trane, McQuays etc. are just sold with leading products separately and are set out, developed some and outdoor temperature change water temperature main control system for referencial use, but due to uncorrelated with indoor load, in fact, it is few that installation unit uses, the dynamic operation of system-wide parameter, the combination of building control and calculator room equipment is controlled, the change water temperature of Intelligent Dynamic, become 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 or the main foreign technology that adopts, integrated control this part enters without enterprise substantially, some automatic controls factories is arranged, mainly also be imitated DDC, the PLC device, control for air-conditioning, basically, there is no formation 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, only have 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 invention provides a kind of digital integrated intelligent control system of central air-conditioner and control method thereof, be adapted to all central air conditioner systems and become current, become water temperature in conjunction with the requirement of controlling, 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 solution adopted in the present invention is: a kind of digital integrated intelligent control system of central air-conditioner, intelligence operating mode s operation control treatment system link circuit: connect the central control cabinet 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 the central control cabinet industrial computer by 485 buses, a plurality of room conditionings place humiture collection module connects the central control cabinet industrial computer by 485 buses, plural machine room signals collecting case connects the central control cabinet industrial computer by 485 buses, outdoor environment signals collecting case connects the central control cabinet industrial computer by 485 buses, the chilled water pump switch board connects the central control cabinet industrial computer by 485 buses, the cooling water pump switch board connects the central control cabinet industrial computer by 485 buses, the cooling tower control cabinet connects the central control cabinet 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 the central control cabinet industrial computer by 485 buses,
control the executive system link circuit: the central control cabinet 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, the central control cabinet industrial computer connects wind cabinet DCS control cabinet by 485 buses, described wind cabinet DCS control cabinet connects wind cabinet water valve, air-valve, the central control cabinet 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, the central control cabinet 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, form chilled water variable-flow control system,
The central control cabinet 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, the central control cabinet 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;
The central control cabinet 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 the marginal efficiency control method of air-conditioner host control system.
serial empirical equation performance analysis by in good time dynamic wind fin heat exchange, calculate real-time moisture absorption coefficient ξ, 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-conditioner water outlet temperature of air conditioner load in good time, according to system host, end-equipment, the pipe network concrete property, temperature number TP, determine minimum backwater water temperature T h, the system water supply amount is limited, calculate the water yield W under water temperature condition, and set up the relation property database of the water yield and differential water pressures △ P in the fan coil operating mode, also provide the control reference to 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, collection signal enters industrial computer and machine room signals collecting cabinet signal group, outdoor environment signals collecting cabinet signal group, the air-conditioner host working condition signal gathers, controls the execution group, is connected with the ADO dynamic data, the intelligent operating mode s operation control treatment system of interacting operation database composition of the exchange of ODBC/OPC dynamic data, VB data processing operation and integrated configuration.
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 correction 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 variable-flow control system is different, and there are various situations that the Mathematical Modeling solution of medelling, solution may occur to adapt to the requirement of multivariable Control by different situations.
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 there are various situations that the Mathematical Modeling solution of medelling, solution may occur to adapt to the requirement of multivariable Control by different situations.
Under the control of intelligence operating mode s operation control treatment system, the output water temperature setting value, air-conditioner host becomes water temperature to be controlled, 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 marginal efficiency control method of computing of efficiency, on efficiency simulation calculating basis by refrigeration machine operating mode efficiency curve, draw the trend marginal cost and control, the air-conditioner host duty parameter method of operation of automatic seeking optimum.
Air-conditioner host limit efficiency control method control system: become water temperature by main frame and regulate, marginal efficiency main frame operation number of units is controlled, marginal efficiency regulating working conditions function composition.
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, at certain poor interval of change width, 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 number of units is controlled: on the efficiency simulation calculating basis by refrigeration machine operating mode efficiency curve, satisfying under supply end demand cold same case, by the efficiency computing of former air-conditioner host load control mode and the comparison operation of efficiency control trend curve, change, change with operational factor by the emulation refrigerating environment, draw the trend marginal cost and control the minimum operation number of units.
Limit efficiency regulating working conditions: on the efficiency simulation calculating basis by refrigeration machine operating mode efficiency curve, satisfying under supply end demand cold same case, by the efficiency computing of former air-conditioner host load control mode and the comparison operation of efficiency control trend curve, change, change with operational factor by the emulation refrigerating environment, draw the trend marginal cost and control.
The digital integrated intelligent control system of central air-conditioner that the utility model provides and control method thereof: main frame becomes water temperature and is adjusted in certain poor interval of change width, 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 number of units is controlled the comparison operation of controlling trend curve by efficiency computing (computing of COP value) and the efficiency of former air-conditioner host load control mode, change, change with operational factor by the emulation refrigerating environment, draw the trend marginal cost and control the minimum operation number of units, rather than the method for the existing target temperature difference segmentation number of units control of adopting; Limit efficiency regulating working conditions draws the trend marginal cost and controls, namely corresponding increase reduces cold, and minimizing increases the comparison of power consumption, the method of operation of automatic seeking optimum is exactly under the constant prerequisite of assure feed water temperature spot, because after the variation of air-conditioner host running environment, regulate load factor under the computing of efficiency arithmetic system, 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 present invention 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-exchanging state 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 accurate calculating benchmark parameter of controlling 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 inadequate because of the water side water temperature water yield of fan coil (end idle call cool equipment), and affect 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 end air-conditioner, variable air rate, the control of change water temperature have also had the control reference, make the control of end air-conditioner more reasonable.
The P-H(pressure enthalpy of the actual working medium that the main frame efficiency evaluation system of setting up (Cop value is calculated in good time) should provide by GB T8097 standard in conjunction with air-conditioner host used factory), T-S(temperature entropy), the operational data storehouse towards the dynamic event process set up of refrigerating capacity/measure hard performance chart.In front under the condition of the accurate cold of the in good time demand of described calculations of air conditioner system, to the unreasonable operating mode of air-conditioner host lower than the COP value under corresponding evaporative condenser condition, limit electric current by system and device output of the present invention, upload the time, upload rate, the analog quantitys such as restriction supply water temperature width is poor reduce power consumption, the comprehensive refrigerating efficiency under corresponding raising air-conditioner host sub-load to air-conditioner host.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing:
1, Fig. 1 is energy-saving equipment Control System NetWork functional areas figure of the present invention.
2, Fig. 2 is energy-saving equipment Control System NetWork figure of the present invention.
3, Fig. 3 is energy-saving equipment control system schematic diagram of the present invention.
4, Fig. 4 is fan coil working condition acquiring processing module schematic diagram of the present invention.
5, Fig. 5 is fan coil working condition acquiring processing module structure chart of the present invention.
6, Fig. 6 is the present invention's intelligence operating mode s operation control treatment system structure chart.
7, Fig. 7 is machine room signal acquisition module structure chart of the present invention.
8, Fig. 8 is outdoor signal acquisition module structure chart of the present invention.
9, Fig. 9 is that chilled water pump of the present invention is controlled the treatment system structure chart.
10, Figure 10 is that cooling water pump of the present invention is controlled the treatment system structure chart.
11, Figure 11 is room conditioning of the present invention place humiture collection module group structure chart.
12, Figure 12 is the freezing variable-flow dynamic fuzzy of the present invention control logic figure.
13, Figure 13 is the cooling variable-flow dynamic fuzzy of the present invention control logic figure.
14, Figure 14 is chilled water variable-flow air-conditioning equipment connection layout of the present invention.
15, Figure 15 is chilled water variable-flow control appliance connection layout of the present invention.
16, Figure 16 is Variable Cooling Water Flow amount air-conditioning equipment connection layout of the present invention.
17, Figure 17 is Variable Cooling Water Flow amount control appliance connection layout of the present invention.
18, Figure 18 is that cooling tower of the present invention is controlled the treatment system structure chart.
part description: 1, full intelligent digital central control cabinet, 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 digital integrated intelligent control system of central air-conditioner, intelligence operating mode s operation control treatment system link circuit: connect central control cabinet 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 control cabinet industrial computer 1 by 485 buses, a plurality of room conditionings place humiture collection module 7 connects central control cabinet industrial computer 1 by 485 buses, plural machine room signals collecting case 18 connects central control cabinet industrial computer 1 by 485 buses, outdoor environment signals collecting case 19 connects central control cabinet industrial computer 1 by 485 buses, chilled water pump switch board 2 connects central control cabinet industrial computer 1 by 485 buses, cooling water pump switch board 3 connects central control cabinet industrial computer 1 by 485 buses, cooling tower control cabinet 4 connects central control cabinet 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 control cabinet industrial computer 1 by 485 buses.
control the executive system link circuit: central control cabinet 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 control cabinet 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 control cabinet 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 control cabinet 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, form chilled water variable-flow control system.
Central control cabinet 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 control cabinet 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 control cabinet 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 the marginal efficiency control method of air-conditioner host control system.
serial empirical equation performance analysis by in good time dynamic wind fin heat exchange, calculate real-time moisture absorption coefficient ξ, 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-conditioner water outlet temperature of air conditioner load in good time, according to system host, end-equipment, the pipe network concrete property, temperature number TP, determine minimum backwater water temperature T h, the system water supply amount is limited, calculate the water yield W under water temperature condition, and set up the relation property database of the water yield and differential water pressures △ P in the fan coil operating mode, also provide the control reference to 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, collection signal enters industrial computer and machine room signals collecting cabinet signal group 18, outdoor environment signals collecting cabinet signal group 19, air-conditioner host working condition signal gather, control that the execution group is connected with the ADO dynamic data, the ODBC/OPC dynamic data exchanges, the intelligent operating mode s operation control treatment system of interacting operation database composition of VB data processing operation and integrated configuration.
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 correction 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 variable-flow control system is different, and there are various situations that the Mathematical Modeling solution of medelling, solution may occur to adapt to the requirement of multivariable Control by different situations.
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 there are various situations that the Mathematical Modeling solution of medelling, solution may occur to adapt to the requirement of multivariable Control by different situations.
Under the control of intelligence operating mode s operation control treatment system, the output water temperature setting value, air-conditioner host becomes water temperature to be controlled, 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 marginal efficiency control method of computing of efficiency, on efficiency simulation calculating basis by refrigeration machine operating mode efficiency curve, draw the trend marginal cost and control, the air-conditioner host duty parameter method of operation of automatic seeking optimum.
Air-conditioner host limit efficiency control method control system: become water temperature by main frame and regulate, marginal efficiency main frame operation number of units is controlled, marginal efficiency regulating working conditions function composition.
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, at certain poor interval of change width, 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 number of units is controlled: on the efficiency simulation calculating basis by refrigeration machine operating mode efficiency curve, satisfying under supply end demand cold same case, by the efficiency computing of former air-conditioner host load control mode and the comparison operation of efficiency control trend curve, change, change with operational factor by the emulation refrigerating environment, draw the trend marginal cost and control the minimum operation number of units.
Limit efficiency regulating working conditions: on the efficiency simulation calculating basis by refrigeration machine operating mode efficiency curve, satisfying under supply end demand cold same case, by the efficiency computing of former air-conditioner host load control mode and the comparison operation of efficiency control trend curve, change, change with operational factor by the emulation refrigerating environment, draw the trend marginal cost and control.
The present invention controls the most of composition of operating part two by instruction, data acquisition computing output; 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 output water temperature sensor, the Inlet and outlet water pressure sensor, Analog Data Acquistion Module, the communications bridge connection module, wireless data transmission module forms.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 output water temperature sensor, the Inlet and outlet water pressure sensor, the DCS acquisition control module, the communications bridge connection module, wireless data transmission module forms.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 forms.
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 form.
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 form.
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 forms.
Intelligence operating mode s operation control treatment system: enter industrial computer and machine room signals collecting cabinet signal group 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 signal group 19, air-conditioner host working condition signal gather, control that the execution group is connected with the ADO dynamic data, the ODBC/OPC dynamic data exchanges, the intelligent operating mode s operation control treatment system of interacting operation database composition of VB data processing operation and integrated configuration.
The control operating part has: chilled water variable-flow control system equipment, and cooling control system equipment, the air-conditioner host control system equipment forms.
Chilled water variable-flow control system equipment: control treatment system by chilled water pump, bypass water valve variable-flow control cabinet 27, bye-pass water valve temperature PID case 23 processed, wind cabinet DSS control cabinet 28 forms.
Chilled water pump is controlled treatment system and is pressed the logic control of event condition response modes chilled water variable-flow control system.By 485 communication I/O data acquisition control output modules, be used for controlling frequency converter 2 operations after exporting, variable frequency pump 13 drops into number of units, the input number of units of main frequency water pump 13 ', the I/O signal feedback such as fault alarm are to industrial computer; 485 communication simulation amount output modules are used for the frequency that the frequency converter frequency conversion is controlled in output, and 485 communication switch amount output modules are used for controlling power frequency/frequency conversion rotation, frequency converter, the actuating signal that general pump drops into, stops.
Bypass water valve variable-flow 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 control system for cooling tower forms.
Cooling water pump is controlled treatment system and 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 for controlling frequency converter 3 operations after exporting, variable frequency pump 14 drops into number of units, the input number of units of main frequency water pump 14 ', the I/O signal feedback such as fault alarm are to industrial computer; 485 communication simulation amount output modules are used for the frequency that the frequency converter frequency conversion is controlled in output, and 485 communication switch amount output modules are used for controlling power frequency/frequency conversion rotation, frequency converter, the actuating signal that general pump drops into, stops.
Cooling tower is controlled treatment system and 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 for controlling frequency converter 4 operations after exporting, frequency conversion fan 15 drops into number of units, the input number of units of power frequency blower fan 15 ', the switch of corresponding water valve is controlled, and the I/O signal feedback such as fault alarm are to industrial computer; 485 communication simulation amount output modules are used for the frequency that the frequency converter frequency conversion is controlled in output, and 485 communication switch amount output modules are used for controlling power frequency/frequency conversion rotation, frequency converter, the actuating signal that the power frequency blower fan drops into, stops.
The air-conditioner host control system is carried out main frame and is become water temperature and number of units by intelligent operating mode s operation control treatment system, air-conditioner host limit efficiency control method control, and marginal efficiency is regulated.By communications bridge connection module 21, air-conditioner host control cabinet 5, air-conditioner host 12 forms.
The operation principle of apparatus of the present invention is as follows:
(this device adopts the EDC programming device to fan coil working condition acquiring processing module group, 8UI/2AO, 5DI/4DO) the air inlet/outlet humiture of 6 collection fan coils, the Inlet and outlet water temperature, Inlet and outlet water pressure reduction, by wind fin heat exchange experience company: calculate real-time moisture absorption coefficient ξ, contact coefficient ES, 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 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 in good time dynamic environment by outdoor environment signals collecting case 19, under in good time environment, air-conditioning system satisfies the air-conditioning feed temperature value that the air-conditioning effect (humiture) of different fields of employment should provide.Indoor temperature and humidity collector 7 compares according to the air-conditioning effect (humiture) of the real-time various air-conditionings fields of employment comfort requirement with 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 in time servo-actuated response 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 acquisition, and according to the heat-exchanging state 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 by system's water yield (pressure reduction), the system water supply amount has also just been had restriction relation.
By the VB programming ACCESS database of setting up, ADO event response relevant database, the odbc database of based on data exchange, 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 Energy Efficiency Analysis, demand cold simulation calculating, the water supply water temperature is optimized adjusting, and optimized equipment is moved the water supply water temperature for water temperature as the setting that air-conditioner host moves in good time, make 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 marginal control method of computing of efficiency, can constantly regulate the air-conditioner host efficiency, relatively reduce the low operating mode operation of air-conditioner host, corresponding saving air-conditioner host energy.
The control procedure of air-conditioner host is mainly reflected in: air-conditioner host becomes water temperature and controls and the marginal efficiency control method of air-conditioner host
Air-conditioner host becomes water temperature and controls: under the control of intelligent operating mode s operation control treatment system, calculating feedwater water temperature T XG by system, at certain poor interval of change width, the output water temperature setting value becomes the operational objective temperature value of air-conditioner host, thereby changes output cold and the consumed energy of air-conditioner host.For the main frame that has backwater difference efficiency to regulate, become water temperature and control the leaving water temperature of not only controlling air-conditioner host, also to control backwater in conjunction with the temperature difference energy Ratios of main frame.
air-conditioner host limit efficiency control method is exactly: on the efficiency simulation calculating basis by refrigeration machine operating mode efficiency curve, satisfying under supply end demand cold same case, 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, drawing the trend marginal cost controls, namely corresponding increase reduces cold, and minimizing increases the comparison of power consumption, the method of operation of automatic seeking optimum, be exactly under the constant prerequisite of assure feed water temperature spot, because after the variation of air-conditioner host running environment, regulate load factor under the computing of efficiency arithmetic system, 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 variable-flow control procedure: chilled water pump variable-flow namely, wind cabinet PID water valve, arm temperature PID water valve, the course of work of differential pressure balancing valve PID water valve variable-flow.
The chilled water pump variable-flow is controlled according to event condition response modes chilled water variable-flow control system logic: be exactly the different situations that respond different chilled water system variable water volume operating modes, and there are various situations that the Mathematical Modeling solution of medelling, solution may occur to adapt to the requirement of multivariable Control by different situations.
At first system judges the case condition, 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 variable-flow main frame and non-variable-flow 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 the basic fuzzy inference of cold (heat) system to control: 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 through fuzzy conclusion, sharpening is processed, foundation is take the temperature difference as benchmark, 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).
The fuzzy inference functional relation of the data acquisition at Main Basis air-condition freezing station and indoor and outdoor parameter opening relationships type, and by regression analysis, it is reasonable that data feedback correction to chilled water is carried.
The water pump variable-flow is namely under the control signal effect, by the extremely high frequency of lowest frequency, high frequency can not satisfy traffic requirement, drop into again a frequency conversion, by calculated rate to the most frequently, when high frequency can not satisfy traffic requirement, drop into again a main frequency water pump, again by new calculated rate until satisfy traffic requirement, otherwise, undertaken by opposite direction.
Wind cabinet DSC switch board PID water valve is controlled, and is an important control action of DCS wind cabinet controller, is the return water temperature restriction point that calculates by intelligent operating mode s operation control treatment system.
Differential-pressure bypass valve switch board PID water valve is controlled, the refrigeration station pressure differential resetting value (higher than the safe pressure difference of air-conditioner host) of calculating by intelligent operating mode s operation control treatment system
The control of chilled water variable flow system: be exactly under the intelligent operating mode s operation control treatment system control take fan coil working condition acquiring processing module group as the basis, 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 PID controls the output water adjusting valve.Press event condition response modes chilled water variable-flow control system method and control water pump variable-flow (frequency conversion becomes the operation number of units).
The cooling control system control procedure: be exactly that under event condition response modes Variable Cooling Water Flow amount control system control logic is controlled, cooling water pump is controlled the treatment system course of work, the control system for cooling tower course of work forms
At first judge the case condition, the a1 class: be exactly air-conditioning type exhaust steam pressure limits value.By air-conditioner host limit efficiency control method system, in conjunction with by definite setting value 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 provides, is by air-conditioner host limit efficiency control method system, in conjunction with by definite setting value 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.By air-conditioner host limit efficiency control method system, in conjunction with by definite setting value on the efficiency simulation calculating basis of refrigeration machine operating mode efficiency curve.
The basic fuzzy inference of cooling control system is controlled: be exactly by gathering the cooling supply and return water temperature of air conditioner, cooling for pressure of return water, outdoor temperature humidity, statistics and relevant operation of air conditioner managerial experiences, through fuzzy conclusion, sharpening is processed, and sets up take the temperature difference as 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 and control water pump variable-flow (frequency conversion becomes the operation number of units), blower fan of cooling tower variable air rate (frequency conversion becomes the operation number of units).At first each variable increment increases air quantity to calculated value by the cooling tower variable air rate, do not reach and increase the cooling water pump variable water volume, to the variable frequency pump peak frequency, do not reach and add again a cooling tower variable air rate increase air quantity to calculated value, not reaching increases a cooling water pump variable water volume again, by calculated rate to high frequency, when high frequency can not satisfy traffic requirement, drop into again a Fans, so until reach 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, 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, 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 satisfy the heat radiation requirement, otherwise, undertaken by opposite direction.
When air-conditioner host and cooling water system corresponding relation are arranged, 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 and is controlled 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, mutually control frequency modulation; 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 controlled by the associated change parameter 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 (1)
1. digital integrated intelligent control system of central air-conditioner, it is characterized in that: intelligent operating mode s operation control treatment system link circuit: connect central control cabinet industrial computer (1) by a plurality of fan coil working condition acquiring processing modules (6), a plurality of wind cabinet DCS control cabinets connect central control cabinet industrial computer (1), a plurality of room conditionings place humiture collection module (7) connects central control cabinet industrial computer (1), plural machine room signals collecting case (18) connects central control cabinet industrial computer (1), outdoor environment signals collecting case (19) connects central control cabinet industrial computer (1), chilled water pump switch board (2) connects central control cabinet industrial computer (1), cooling water pump switch board (3) connects central control cabinet industrial computer (1), cooling tower control cabinet (4) connects central control cabinet 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 control cabinet industrial computer (1),
control the executive system link circuit: central control cabinet 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 control cabinet industrial computer (1) connects wind cabinet DCS control cabinet, described wind cabinet DCS control cabinet connects wind cabinet water valve, air-valve, central control cabinet industrial computer (1) connecting branch temperature PID water valve control cabinet, described arm temperature PID water valve control cabinet connecting branch water valve, central control cabinet industrial computer (1) connects differential pressure balancing valve PID control cabinet, described differential pressure balancing valve PID control cabinet connects differential pressure balancing valve, form chilled water variable-flow control system,
Central control cabinet industrial computer (1) connects 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 control cabinet industrial computer (1) connects 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 control cabinet industrial computer (1) connects 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 the marginal efficiency control method of air-conditioner host control system.
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