CN100578106C - Quality and regulation control method and system for chill station of central air conditioner - Google Patents
Quality and regulation control method and system for chill station of central air conditioner Download PDFInfo
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Abstract
The present invention relates to a quality regulation control method of central air-conditioning refrigerating station and its system. It belongs to a method for controlling operation of central air-conditioning refrigerating station and its system. Said system includes internal weather parameter monitoring portion, central air-conditioning system operation parameter monitoring portion, quality regulation control main machine, cold water machine unit control unit for controlling water supply temperature for refrigeration, cooling tower frequency conversion control unit for controlling cooling tower outlet temperature, refrigerating water pump frequency conversion control unit and cooling water pump frequency conversion control unit. Besides, said invention also provides the concrete steps of its quality regulation control method.
Description
Technical field
The present invention relates to the energy-saving control method and the system of a kind of central air-conditioning refrigeration station equipment, be applicable to the automatic control of central air-conditioning refrigeration station, belong to the air conditioner energy saving application.
Background technology
The capital equipment of central air-conditioning refrigeration station is handpiece Water Chilling Units, chilled water pump, cooling water pump, cooling tower.In central air conditioner system, refrigeration station occupies the over half of whole energy consumption, is the emphasis of energy conservation.
The energy-saving run of present central air-conditioning refrigeration station equipment is controlled, and generally take the way energy-saving run of chilled water pump, cooling water pump and cooling tower frequency control, and handpiece Water Chilling Units often takes platform to count the method for start and stop, operates to the variable water volume system; Perhaps only carry out the platform of water pump and handpiece Water Chilling Units and count start and stop control, operate to and decide water yield system.Yet; the platform of chilled water pump, cooling water pump and blower fan of cooling tower is counted start and stop or frequency control; though can reduce the energy consumption of these equipment, do not reduce the energy consumption of handpiece Water Chilling Units, even because platform is counted the increase that start and stop or frequency control cause the handpiece Water Chilling Units operation energy consumption on the contrary.The energy consumption of handpiece Water Chilling Units not only has relation with refrigerating capacity, and with the gentle coolant water temperature of chilled water substantial connection is arranged.Therefore from the whole efficiency angle at central air-condition freezing station, strong request from variable water volume, become two dimensions of water temperature and carry out Energy Saving Control, between the Energy Saving Control of the Energy Saving Control of handpiece Water Chilling Units and auxiliary equipment, set up related control.
Summary of the invention
At the deficiencies in the prior art and defective, purpose of the present invention and task provide a kind of central air-conditioning refrigeration station quality and control method and system, promptly a kind of to refrigeration station inner cold water unit by setting up, cooling tower, the association control method of chilled water pump and cooling water pump and system, control refrigeration station inner cold water unit and cooling tower become water temperature operation (promptly " matter " transfers), the control chilled water pump, cooling water pump variable water volume operation (promptly " amount " transfers), reach quality and accent, save power consumption, the effect that the refrigeration station whole efficiency is the highest only relies on frequency control to solve in the existing refrigeration station Energy Saving Control, the problem that energy-saving efficiency is low.
Purpose of the present invention and task are to realize by the following technical solutions:
A kind of central air-conditioning refrigeration station quality and control method is characterized in that this method comprises the steps:
1) according to the part throttle characteristics and the equipment configuring condition of central air conditioner system, be based upon the control model adjustment curve under the wet-bulb temperature and rate of load condensate condition outside the different chamber, in quality and regulation and control system main frame, store this serial curve in advance, in order to calculate quality and the regulation and control system parameter in the actual motion, along with the operation produce real data gradually after, again model is revised accordingly;
2) operational factor of monitoring outdoor temperature humidity parameter and central air-conditioning refrigeration station, described operational factor comprise refrigeration supply water temperature, chilled-water flow, chilled water return water temperature, chilled water pressure of supply water and pressure of return water and the bypass discharge of cooling tower leaving water temperature and last coolant-temperature gage, handpiece Water Chilling Units;
3) the above-mentioned parameter acquisition that monitors is made main frame to quality with data processing function and regulation and control, calculate the rate of load condensate of central air-conditioning refrigeration station; According to the curve that stores in the main control system, calculate pledge regulation and control system parameter and amount regulation and control system parameter again, matter regulation and control system parameter comprises refrigeration supply water temperature and cooling tower leaving water temperature, and amount regulation and control system parameter comprises chilled-water flow and cooling water flow;
4) quality and the regulation and control systems main frame refrigeration supply water temperature and the cooling tower leaving water temperature that will calculate imported handpiece Water Chilling Units control module and cooling tower frequency conversion control unit respectively, and handpiece Water Chilling Units control module control handpiece Water Chilling Units is regulated the refrigeration supply water temperature; Cooling tower frequency conversion control unit control blower fan of cooling tower rotating speed is realized the control to the cooling tower leaving water temperature;
5) quality and regulation and control system main frame are imported chilled water pump frequency conversion control unit and cooling water pump frequency conversion control unit respectively with the chilled-water flow and the cooling water flow that calculate, the chilled-water flow that the realization of chilled water pump frequency conversion control unit control chilled water pump is set; Cooling water pump frequency conversion control unit control cooling water pump is realized the cooling water flow of setting.
6) handpiece Water Chilling Units, cooling tower, chilled water pump and cooling water pump feedback equipment state separately are to the control corresponding unit.
Above-mentioned steps 5) chilled-water flow that the control of chilled water pump frequency conversion control unit is set in can carry out fixed difference difference control according to the chilled water supply and return water temperature of monitoring; Or, carry out the control of level pressure difference according to the pressure differential of a certain representative point in the central air conditioner system chilled water water supply network of monitoring; Or, carry out G=f (Q) control according to the central air conditioner system operating load of monitoring; Or, carry out constant valve opening control according to the valve opening of central air-conditioning end-equipment of monitoring.
The quality of a kind of central air-conditioning refrigeration station that implements said method provided by the invention is also regulated and control the system system, it is characterized in that this system comprises:
1) main frame, handpiece Water Chilling Units, cooling tower, cooling water pump and chilled water pump are made in quality and the regulation and control with data processing function;
2) be used to monitor the out door climatic parameter monitoring part of outdoor temperature humidity, this test section is made of the outdoor temperature humidity sensor, and the signal output part of described outdoor temperature humidity sensor links to each other with the signal input part of quality and regulation and control system main frame;
3) central air-conditioning refrigeration station operational factor monitoring part, this test section comprises water temperature sensor on the leaving water temperature sensor that is installed in respectively on cooling tower outlet conduit and the water supply pipeline and the cooling tower, be installed in refrigeration supply water temperature sensor and chilled water pressure of supply water sensor and chilled water water supply flow sensor on the refrigeration water supply line, be installed in chilled water return water temperature sensor and chilled water pressure of return water sensor and bypass water flow sensor on the chilled water water return pipeline, above-mentioned all temps, the signal output part of pressure and flow sensor links to each other with the signal input part of quality and regulation and control system main frame;
4) be used to control the handpiece Water Chilling Units control module of refrigeration leaving water temperature, the signal of the refrigeration supply water temperature of this handpiece Water Chilling Units control module quality of reception and the output of regulation and control system main frame, and this signal is passed to handpiece Water Chilling Units regulate the refrigeration supply water temperature;
5) be used to control the cooling tower frequency conversion control unit of cooling tower leaving water temperature, the signal of the cooling tower leaving water temperature of this cooling tower frequency conversion control unit quality of reception and the output of regulation and control system main frame, and cooling tower is carried out electric variable frequency regulating speed control according to this signal;
6) be used to control the cooling water pump frequency conversion control unit of cooling water flow, the cooling water flow signal of this cooling water pump VFC quality of reception and the output of regulation and control system main frame, and according to this signal cooling water pump is carried out variable frequency adjustment and realize the variable water volume operation;
7) be used to control the chilled water pump frequency conversion control unit of chilled-water flow, the chilled-water flow signal of this chilled water pump frequency conversion control unit quality of reception and the output of regulation and control system main frame, and according to this signal chilled water pump is carried out variable frequency adjustment and realize the variable water volume operation.
Quality of the present invention and regulation and control system main frame adopt industrial Programmable Logic Controller or industrial control computer.
Technical characterictic of the present invention also is: described central air-conditioning refrigeration station quality is also regulated and control the system system and is also comprised the remote monitoring part, this remote monitoring part is connected with quality and regulation and control system main frame by EPA, be used for the operation of remote monitoring central air-conditioning refrigeration station equipment, and the fortuitous event of teleprocessing refrigeration station equipment appearance.
Central air-conditioning quality of the present invention and control method and system, compared with prior art, have the following advantages and the high-lighting effect: 1. the present invention is according to the detection of out door climatic parameter and refrigeration station actual operation parameters, realization is to change water temperature, unsteady flow amount quality and the allocation and transportation row at central air-condition freezing station, promptly regulate the supply water temperature and the water supply flow of refrigeration station according to load variations, efficiently solve the not high problem of whole efficiency in the existing central air-conditioning refrigeration station Energy Saving Control, further improved the overall operation efficiency of central air-conditioning refrigeration station; 2. this control method is simple, system stability, safety, reliable; 3. take the technology of foregoing invention, the equipment of central air-conditioning refrigeration station can be become effectively water temperature variable water volume quality and transfer control automatically, both solve the not high problem of whole efficiency in the existing central air-conditioning refrigeration station Energy Saving Control, had on-the-spot simple installation, system stability, advantage reliably again.Apparatus of the present invention can be designed to the modular construction of different size, and on-the-spot installation is convenient, and installation period is short, is easy to Project Realization, and installation and maintenance is convenient.
Description of drawings
Fig. 1 is central air-conditioning refrigeration station quality provided by the invention and the structural principle schematic diagram of regulating and control the system system.
Fig. 2 is central air-conditioning refrigeration station quality provided by the invention and regulation and control system theory structure block diagram.
Fig. 3 be outside different chamber the rate of load condensate under the wet-bulb temperature with the refrigeration supply water temperature control model adjustment curve.
Fig. 4 is the control model adjustment curve of the rate of load condensate under the wet-bulb temperature and cooling tower leaving water temperature outside different chamber.
Fig. 5 is a rate of load condensate and the relation curve of chilled-water flow ratio.
Fig. 6 is central air-conditioning refrigeration station quality provided by the invention and regulation and control system logic diagram.
Among the figure: the 1-handpiece Water Chilling Units; The 2-cooling tower; The 3-cooling water pump; The 4-chilled water pump; 5-refrigeration supply water temperature sensor; 6-leaving water temperature sensor; The last water temperature sensor of 7-; 8-return water temperature sensor; 9-pressure of supply water sensor; 10-pressure of return water sensor; 11-water supply flow sensor; 12-bypass water flow sensor; 13-outdoor temperature humidity sensor; 14-blower fan of cooling tower frequency conversion control unit; 15-cooling water pump frequency conversion control unit; 16-handpiece Water Chilling Units control module; 17-quality and regulation and control system main frame; 18-chilled water pump frequency conversion control unit; 19-cooling tower water supply pipeline; 20-cooling tower outlet conduit; The 21-water supply line that freezes; 22-chilled water water return pipeline; 23-central air-conditioning refrigeration station equipment; 24-central air-conditioning refrigeration station energy-saving control system; 25-out door climatic parameter monitoring part; 26-refrigeration station operational factor monitoring part; 27-remote monitoring part.
The specific embodiment
Be further described below in conjunction with the implementation process of accompanying drawing the inventive method and control system.
Fig. 1 is central air-conditioning refrigeration station quality provided by the invention and the structural principle schematic diagram of regulating and control the system system.This system comprises quality and regulation and control system main frame 17, handpiece Water Chilling Units 1, handpiece Water Chilling Units control module 16, cooling tower 2, cooling tower frequency conversion control unit 14, cooling water pump 3, cooling water pump frequency conversion control unit 15, chilled water pump 4, chilled water pump frequency conversion control unit 18, out door climatic parameter monitoring part 25 and the refrigeration station operational factor monitoring part 26 with data processing function.Cooling tower 2 links to each other with handpiece Water Chilling Units 1 with cooling tower outlet conduit 20 by cooling tower water supply pipeline 19 respectively; Handpiece Water Chilling Units links to each other with the end-equipment of air-conditioning system with chilled water water return pipeline 22 by refrigeration water supply line 21 respectively.
Fig. 2 is central air-conditioning refrigeration station quality provided by the invention and regulation and control system theory structure block diagram.It comprises quality and the regulation and control system main frame 17 with data processing function, be used to monitor the out door climatic parameter monitoring part 26 of outdoor temperature humidity, central air-conditioning refrigeration station operational factor monitoring part 25, be used to control the handpiece Water Chilling Units control module 16 of refrigeration leaving water temperature, be used to control the cooling tower frequency conversion control unit 14 of cooling tower leaving water temperature, be used to control the cooling water pump frequency conversion control unit 15 of cooling water flow, be used to control the chilled water pump frequency conversion control unit 18 of chilled-water flow.Handpiece Water Chilling Units control module 16 is used for control refrigeration leaving water temperature, the signal of the refrigeration supply water temperature of this handpiece Water Chilling Units control module quality of reception and 17 outputs of regulation and control system main frame, and this signal is passed to handpiece Water Chilling Units 1 regulate the refrigeration supply water temperature; Cooling tower frequency conversion control unit 14 control cooling tower leaving water temperatures, the signal of the cooling tower leaving water temperature of main frame 17 outputs is made in this cooling tower frequency conversion control unit quality of reception and regulation and control, and according to this signal cooling tower 2 is carried out electric variable frequency regulating speed control; Cooling water pump frequency conversion control unit 15 control cooling water flows, the cooling water flow signal of this cooling water pump VFC quality of reception and 17 outputs of regulation and control system main frame, and according to this signal cooling water pump 3 is carried out variable frequency adjustment and realize the variable water volume operation; The chilled water pump frequency conversion control unit of chilled water pump frequency conversion control unit 18 control chilled-water flows, the chilled-water flow signal of this chilled water pump frequency conversion control unit quality of reception and 17 outputs of regulation and control system main frame, and according to this signal chilled water pump 4 is carried out variable frequency adjustment and realize the variable water volume operation.Out door climatic parameter monitoring portion is made of outdoor temperature humidity sensor 13, the signal input part of the signal output part of described outdoor temperature humidity sensor and quality and the regulation and control system main frame refrigeration station operational factor that links to each other is monitored part 26 and is comprised water temperature sensor 7 on the leaving water temperature sensor 6 that is installed in respectively on cooling tower outlet conduit 20 and the water supply pipeline 19 and the cooling tower, be installed in refrigeration supply water temperature sensor 5 and chilled water pressure of supply water sensor 9 and water supply flow sensor 11 on the refrigeration water supply line 21, be installed in chilled water return water temperature sensor 8 and chilled water pressure of return water sensor 10 and bypass water flow sensor 12 on the chilled water water return pipeline 22; The signal output part of above-mentioned all temps, pressure and flow sensor links to each other with the signal input part of quality and regulation and control system main frame.
The foundation that change water temperature of the present invention and variable water volume quality and regulation and control are made is the outdoor meteorological humiture state and the central air conditioner system running status of being monitored respectively by out door climatic parameter monitoring part and refrigeration station operational factor monitoring part.
Concrete monitoring parameter comprises:
Outdoor temperature humidity,
Coolant-temperature gage on cooling tower leaving water temperature, the cooling tower,
Refrigeration supply water temperature, flow, freezing return water temperature,
Chilled water pressure of supply water, pressure of return water,
Bypass discharge.
Can calculate by above-mentioned these parameters:
Central air-conditioning load=chilled-water flow * (freezing return water temperature-refrigeration supply water temperature);
Rate of load condensate=central air-conditioning operating load/design load;
Chilled-water flow ratio=water supply operation flow/water supply design discharge.
The control that the present invention transfers change water temperature matter, the one, according to the outdoor meteorological humiture parameter and the central air conditioner system rate of load condensate size of monitoring, the refrigeration supply water temperature that main frame 17 calculates the central air-conditioning refrigeration station is made in quality and regulation and control.Export this control parameter then and give the handpiece Water Chilling Units control module, handpiece Water Chilling Units control module 16 control handpiece Water Chilling Units are regulated the refrigeration supply water temperature.The mode of handpiece Water Chilling Units control module and handpiece Water Chilling Units transmission refrigeration supply water temperature can be by industrial bus communication modes such as Mod-bus, BACnet, Profibus, RS485, also can be analog quantity outputs such as 4～20mA, 0～10V.The refrigeration supply water temperature is high more, and chiller efficiency is high more.But the height of refrigeration supply water temperature is subjected to the restriction of air conditioner load size and air conditioner dehumidification requirement.So in becoming water temperature matter regulation and control system, according to the part throttle characteristics and the end-equipment configuring condition of central air conditioner system, simulation is based upon the adjustment curve of the supply water temperature that freezes under the wet-bulb temperature and rate of load condensate condition different chamber outside.In quality and regulation and control system main frame, store this serial curve in advance, in order to calculate the refrigeration supply water temperature in the actual motion.Along with after operation produces real data gradually, then model is revised accordingly, be used further to become water temperature matter regulation and control system.
The present invention is to becoming water temperature matter regulation and control system, and the 2nd, according to the outdoor meteorological wet-bulb temperature of monitoring, regulate the rotating speed of blower fan of cooling tower by cooling tower frequency conversion control unit 14, realize the control of cooling tower leaving water temperature.According to the outdoor meteorological wet-bulb temperature and the central air conditioner system operating load of monitoring, quality and regulation and control system main frame calculate the coolant water temperature of the cooling tower water outlet of central air-conditioning refrigeration station.Export this parameter then and give cooling tower frequency conversion control unit 14, the cooling tower frequency conversion control unit is regulated the running speed of blower fan of cooling tower according to this parameter, thereby realizes the control to cooling tower 2 leaving water temperatures.The cooling tower leaving water temperature is low more, and chiller efficiency is high more.But the height of cooling tower leaving water temperature is subjected to the restriction of air conditioner load size and outdoor wet-bulb temperature.So in becoming water temperature matter regulation and control system, according to central air conditioner system cooling tower equipment configuring condition, simulation is based upon outside the different chamber adjustment curve of cooling tower leaving water temperature under the wet-bulb temperature and rate of load condensate condition.In quality and regulation and control system main frame, store this serial curve in advance, in order to calculate the cooling tower leaving water temperature in the actual motion.Along with after operation produces real data gradually, then model is revised accordingly, be used further to become water temperature matter regulation and control system.
The present invention is according to the central air conditioner system operating load of monitoring to variable water volume amount regulation and control system, quality and regulation and control system main frame calculate the chilled-water flow of central air-conditioning refrigeration station, export this parameter and give chilled water pump frequency conversion control unit 18, the chilled water pump frequency conversion control unit is carried out frequency control to chilled water pump 4, thereby realizes the control to chilled-water flow.
The present invention can be the chilled water supply and return water temperature according to monitoring to the control and regulation of chilled-water flow, carries out fixed difference difference control; Can be pressure differential, carry out the control of level pressure difference according to a certain representative point in the central air conditioner system chilled water water supply network of monitoring; Can be central air conditioner system operating load, carry out G=f (Q) control according to monitoring; Can also be valve opening, carry out constant valve opening control according to the central air-conditioning end-equipment of monitoring.
The chilled water pump control module can carry out variable water volume control respectively to one-level chilled water pump, secondary chilled water pump and three grades of chilled water pumps according to different chilled water system forms.
Another purpose of variable water volume amount regulation and control system of the present invention is the central air conditioner system operating load according to monitoring, and quality and regulation and control system main frame calculate the cooling water flow of central air-conditioning refrigeration station, export this parameter and give the cooling water pump control module.The cooling water pump control module carries out frequency control to cooling water pump, thereby realizes the control to cooling water flow.
The control and regulation of cooling water flow can be the cooling water supply and return water temperatures according to monitoring, carry out fixed difference difference control; Can be central air conditioner system operating load, carry out G=f (Q) control according to monitoring.
Become water temperature control section, variable water volume control section, control by feed forward method, feedback method, PID method, neuroid method etc. in typical case.
In the said method, described quality and regulation and control system main frame are industrial Programmable Logic Controller PLC or industrial control computer.
Chilled water pump in the above-mentioned central air-conditioning refrigeration station equipment can be a chilled water pump form, perhaps secondary chilled water pump form, or the freezing water system that has multistage chilled water pump to be connected in series.
In the said system, the operation that remote monitoring part can remote monitoring central air-conditioning refrigeration station equipment, but be not the necessary part of central air-conditioning refrigeration station energy-saving monitoring system.In the system that does not have the remote monitoring part, can realize becoming water temperature variable water volume energy-saving run by control system equally.
Embodiment:
Below in conjunction with accompanying drawing, the inventive method and system are described in detail.
Quality and regulation and control system main frame 17 are handled the parameter of monitoring, calculate the operating load rate of central air-conditioning refrigeration station.Model curve according to being stored in advance in quality and the regulation and control system main frame calculates the control output parameter: refrigeration supply water temperature and cooling tower leaving water temperature that matter is transferred, chilled-water flow and cooling water flow that amount is transferred.This part adopts the industrial Programmable Logic Controller PLC with calculation function.
An example of the control curve of refrigeration supply water temperature as shown in Figure 3.
Quality and regulation and control system main frame 17, output refrigeration supply water temperature is given handpiece Water Chilling Units control module 16.This handpiece Water Chilling Units control module can be the communication module with Profi-bus communication.This module and handpiece Water Chilling Units are carried out data communication, and refrigeration supply water temperature control parameter is passed to handpiece Water Chilling Units, and handpiece Water Chilling Units is regulated the refrigeration supply water temperature according to this parameter, and the running status of handpiece Water Chilling Units is fed back to quality and regulation and control system main frame.When outside humidity is 23 ℃, the rate of load condensate of monitoring is 80% o'clock, and the output cryogenic temperature that obtains according to the control curve is 10 ℃, and the cold engine efficiency of the specified 7 ℃ of cryogenic temperatures of specific output improves 10% approximately.
An example of the control curve of cooling tower leaving water temperature as shown in Figure 4.
Quality and regulation and control system main frame 17, output cooling tower leaving water temperature is given cooling tower frequency conversion control unit 14.This cooling tower frequency conversion control unit 14 can be control module and the frequency converter electrical equipment with Profi-bus communication.To the control and regulation of blower fan of cooling tower variable frequency adjustment realization to the cooling tower leaving water temperature.When outside humidity is 23 ℃, the rate of load condensate of monitoring is 80% o'clock, and the cooling tower leaving water temperature that obtains according to the control curve is 26 ℃.
An example of the control curve of chilled water variable water volume as shown in Figure 5.
Quality and regulation and control system main frame 17, the output chilled-water flow is given chilled water pump frequency conversion control unit 18.This chilled water pump frequency conversion control unit 18 can be control module and the frequency converter electrical equipment with Profi-bus communication.The chilled water pump variable frequency adjustment is realized the variable water volume operation.When the rate of load condensate of monitoring was 80%, the chilled-water flow that obtains according to the control curve was 72% of a metered flow.This moment, the actual power of chilled water pump was about 40% of rated power.
The PID control that an example of the control of cooling water variable water volume is constant cooling supply backwater temperature difference.
Quality and regulation and control system main frame 17, the output cooling water flow is given cooling water pump frequency conversion control unit 15.This cooling water pump frequency conversion control unit 15 can be control module and the frequency converter electrical equipment with Profi-bus communication.The cooling water pump variable frequency adjustment is realized the variable water volume operation.When the rate of load condensate of monitoring was 80%, the cooling water flow that obtains according to constant cooling supply backwater temperature difference control was 80% of a metered flow.This moment, the actual power of cooling water pump was about 50% of rated power.
This remote monitoring part 27 comprises parts such as communication, man-machine interface and database, adopt industrial control computer, the installation and operation monitoring software, be connected by EPA with quality and regulation and control system main frame, operation that can remote monitoring central air-conditioning refrigeration station equipment, and the fortuitous event that occurs of teleprocessing refrigeration station equipment.
Claims (1)
1. central air-conditioning refrigeration station quality and control method is characterized in that this method comprises the steps:
1) according to the part throttle characteristics and the equipment configuring condition of central air conditioner system, be based upon the control model adjustment curve under the wet-bulb temperature and rate of load condensate condition outside the different chamber, in quality and regulation and control system main frame, store this serial curve in advance, in order to calculate quality and the regulation and control system parameter in the actual motion, along with the operation produce real data gradually after, again model is revised accordingly;
2) operational factor of monitoring outdoor temperature humidity parameter and central air-conditioning refrigeration station, described operational factor comprise refrigeration supply water temperature, chilled-water flow, chilled water return water temperature, chilled water pressure of supply water and pressure of return water and the bypass discharge of cooling tower leaving water temperature and last coolant-temperature gage, handpiece Water Chilling Units;
3) the above-mentioned parameter acquisition that monitors is made main frame to quality with data processing function and regulation and control, calculate the rate of load condensate of central air-conditioning refrigeration station; According to the curve of quality and the storage of regulation and control system host memory, calculate pledge regulation and control system parameter and amount regulation and control system parameter again, matter regulation and control system parameter comprises refrigeration supply water temperature and cooling tower leaving water temperature, and amount regulation and control system parameter comprises chilled-water flow and cooling water flow;
4) quality and the regulation and control systems main frame refrigeration supply water temperature and the cooling tower leaving water temperature that will calculate imported handpiece Water Chilling Units control module and cooling tower frequency conversion control unit respectively, and handpiece Water Chilling Units control module control handpiece Water Chilling Units is regulated the refrigeration supply water temperature; Cooling tower frequency conversion control unit control blower fan of cooling tower rotating speed is realized the control to the cooling tower leaving water temperature;
5) quality and regulation and control system main frame are imported chilled water pump frequency conversion control unit and cooling water pump frequency conversion control unit respectively with the chilled-water flow and the cooling water flow that calculate, the chilled-water flow that the realization of chilled water pump frequency conversion control unit control chilled water pump calculates; The cooling water flow that the realization of cooling water pump frequency conversion control unit control cooling water pump calculates;
6) handpiece Water Chilling Units, cooling tower, chilled water pump and cooling water pump feedback equipment state separately are to the control corresponding unit.
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| CN200710118464A CN100578106C (en) | 2007-07-06 | 2007-07-06 | Quality and regulation control method and system for chill station of central air conditioner |
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| CN200710118464A CN100578106C (en) | 2007-07-06 | 2007-07-06 | Quality and regulation control method and system for chill station of central air conditioner |
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