CN105444356A - Intelligent energy efficiency optimizing control system for central air conditioning system and control method of intelligent energy efficiency optimizing control system - Google Patents
Intelligent energy efficiency optimizing control system for central air conditioning system and control method of intelligent energy efficiency optimizing control system Download PDFInfo
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- CN105444356A CN105444356A CN201510903746.8A CN201510903746A CN105444356A CN 105444356 A CN105444356 A CN 105444356A CN 201510903746 A CN201510903746 A CN 201510903746A CN 105444356 A CN105444356 A CN 105444356A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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Abstract
The invention relates to an intelligent energy efficiency optimizing control system for a central air conditioning system and a control method of the intelligent energy efficiency optimizing control system. The intelligent energy efficiency optimizing control system comprises a collection unit, a monitoring unit, an arithmetical unit, a control unit, a receiving unit and a display unit, wherein the receiving unit and the display unit are connected with the control unit. The control unit is used for judging whether the operation result meets the preset judgment condition or not and controlling operation of a water chilling unit refrigerating circulation system, a freezing water circulation system, a cooling water circulation system, an air conditioner tail end circulation system and a cooling tower circulation system by the adoption of a control strategy corresponding to the preset judgment condition when the preset judgment condition is met. The intelligent energy efficiency optimizing control system for the central air conditioning system can monitor and track electricity utilization data of electricity utilization equipment of five sub items of the central air conditioning system in real time for a long time, the data are compared with the set values to evaluate the energy efficiency levels of all loops of the central air conditioning system, proper control strategies are selected according to the evaluation results, and the energy efficiency of the central air conditioning system reaches the optimum degree.
Description
Technical field
The present invention relates to central air-conditioning automation control area, particularly relate to a kind of efficiency Intelligent Optimal control system and control method thereof of central air conditioner system.
Background technology
Along with the raising of China's rapid development of economy and living standards of the people, environment, resource problem have been subject to the common concern of various circles of society, and energy-saving and emission-reduction seem particularly urgent.Central air conditioner system is architectural energy consumption rich and influential family, and general operational energy efficiency is lower, there is the larger energy saving space.Adopt general Automated condtrol means can reach certain energy-saving effect, but existing automatic control product is all by general experience, to refrigeration station refrigeration machine and supporting water pump thereof, cooling towers etc. carry out the control of start-stop, realize unattended operation, thus reaching the object more energy-conservation than artificial start-stop equipment, its energy-saving benefit is small.
At present, the technological transformation, PLC Based Intelligent Control, VFC etc. of air-conditioning equipment are the Main Means of central air-conditioning energy technology.But central air conditioner system equipment coordination running technology is complicated, running environment parameter is changeable, need the technical factor considering each link of system, just can reach desirable energy-saving effect, transformation and control program are only carried out by rule of thumb, the data foundation of shortage science, can reach what energy conservation object do not have yet can scientific forecasting, therefore energy-saving effect produces little effect.Such as, the frequency conversion of cooling water pump is when the numerical value reference not having efficiency tracking system, and often cooling water pump conveying energy consumption reduces, but the energy consumption of refrigeration unit increases, and overall energy consumption increases on the contrary.So the frequency conversion of water pump can not provide good help for the energy-efficient operation of central air-conditioning.The operation reserve of refrigeration unit is the key of whole system efficiency height, there is no the every energy efficiency indexes of the real-time tracking of efficiency tracking system, the boundary condition being difficult to find the minimum boundary point of variable-flow, handpiece Water Chilling Units variable temperature to control and multiple stage are run optimum operation and to be arranged in pairs or groups most effective point etc., and these improve the key of entire system efficiency exactly.
Summary of the invention
The invention provides a kind of efficiency Intelligent Optimal control system of central air conditioner system, to solve the problems of the technologies described above.
In order to achieve the above object, technical scheme of the present invention is achieved in that a kind of efficiency Intelligent Optimal control system of central air-conditioning, comprising: collecting unit, monitoring means, arithmetic element, control unit and display unit; Collecting unit is for gathering the data parameters of handpiece Water Chilling Units cooling cycle system, the chilled water circulatory system, cooling water recirculation system, the cooling tower circulatory system and the air conditioning terminal circulatory system; Collecting unit comprises one or more in electric energy meter, power transducer, flow transmitter, temperature transmitter, humidity transmitter, for monitoring the temperature of central air-conditioning, power, power consumption, cold, humidity, efficiency and indoor and outdoor surroundings parameter; Monitoring means is connected with collecting unit, for monitoring collecting unit, to obtain monitoring result; Arithmetic element is connected with monitoring means, and the data operation for monitoring according to monitoring means goes out rate of load condensate and the efficiency of whole central air conditioner system and handpiece Water Chilling Units cooling cycle system, the chilled water circulatory system, cooling water recirculation system, the cooling tower circulatory system and the air conditioning terminal circulatory system; Control unit is connected with arithmetic element, Rule of judgment is preset for judging whether operation result meets, and when meeting default Rule of judgment, adopt the control strategy corresponding with default Rule of judgment to control the operation of handpiece Water Chilling Units cooling cycle system, the chilled water circulatory system, cooling water recirculation system and the cooling tower circulatory system; Display unit connection control unit, for showing the real-time running state of whole central air conditioner system and handpiece Water Chilling Units cooling cycle system, the chilled water circulatory system, cooling water recirculation system, the air conditioning terminal circulatory system and the cooling tower circulatory system, rate of load condensate, efficiency and efficiency grade.
Further, also comprise receiving element, be connected with control unit, for receiving the control strategy of user's input, and/or for receiving the default Rule of judgment of user's input.
Further, control unit comprises handpiece Water Chilling Units control module, handpiece Water Chilling Units correction module, chilled water pump control module, chilled water pump correction module, cooling water pump control module, cooling water pump correction module, cooling tower control module, cooling tower correction module and team control module; Handpiece Water Chilling Units control module connects handpiece Water Chilling Units, for the opening and closing of the electric butterfly valve and unit itself that control handpiece Water Chilling Units cooling water and chilled water feed pipe, handpiece Water Chilling Units correction module is for feeding back the real-time status of the butterfly valve of handpiece Water Chilling Units and correspondence to control unit; Chilled water pump control module connects the gauge tap of chilled water pump, and for controlling the opening and closing of chilled water pump gauge tap, chilled water pump correction module is for feeding back the real-time status of chilled water pump to control unit; Cooling water pump control module connects the gauge tap of cooling water pump, and for the opening and closing of controlled cooling model water pump gauge tap, cooling water pump correction module is for feeding back the real-time status of cooling water pump to control unit; Cooling tower control module connects the gauge tap of cooling tower, and for the opening and closing of the inlet valve of controlled cooling model tower gauge tap and cooling tower, cooling tower correction module is for feeding back the real-time status of cooling tower and inlet valve to control unit; Control unit controls team control module according to the Real-time Load rate of arithmetic element computing and adds machine or subtract machine.
Further, handpiece Water Chilling Units cooling cycle system comprises refrigeration controler, refrigeration controler is for regulating the water outlet temperature setting value of handpiece Water Chilling Units, and handpiece Water Chilling Units control module connects refrigeration controler, for passing through the automatic adjusting water outlet desired temperature of handpiece Water Chilling Units control module.
A control method for the efficiency Intelligent Optimal control system of central air-conditioning described above, comprises the following steps:
(1) the handpiece Water Chilling Units control module of control unit controls the electric butterfly valve of handpiece Water Chilling Units cooling water and chilled water water inlet pipe and water outlet pipe, if electric butterfly valve is not normally opened, handpiece Water Chilling Units correction module gives the alarm, and stops opening electric butterfly valve, and error message is sent to control unit; If multiple stage handpiece Water Chilling Units cooperation, handpiece Water Chilling Units control module controls the electric butterfly valve opening next handpiece Water Chilling Units, and repeats this operation logic;
(2) after the electric butterfly valve of handpiece Water Chilling Units is normally opened, the cooling tower control module controlled cooling model tower gauge tap of control unit and the inlet valve of cooling tower are opened, if cooling tower and inlet valve are not all normally opened, cooling tower correction module gives the alarm, and stops opening cooling tower gauge tap and closing inlet valve; If multiple stage cooling tower cooperation, cooling tower control module controls gauge tap and the inlet valve of opening next cooling tower, and repeats this operation logic;
(3), after cooling tower is normally opened, the chilled water pump control module of control unit controls the gauge tap unlatching of chilled water pump, if chilled water pump is not normally opened, chilled water pump correction module gives the alarm, and stops opening chilled water pump gauge tap; If multiple stage chilled water pump cooperation, chilled water pump control module controls next chilled water pump and opens, and repeats this operation logic;
(4) after chilled water pump is normally opened, the gauge tap of the cooling water pump control module controlled cooling model water pump of control unit is opened, if cooling water pump is not normally opened, cooling water pump correction module gives the alarm, and stops opening cooling water pump gauge tap; If multiple stage cooling water pump cooperation, cooling water pump control module controls next chilled water pump and opens, and repeats this operation logic;
(5) after cooling water pump is normally opened, the handpiece Water Chilling Units control module of control unit controls handpiece Water Chilling Units and opens, if handpiece Water Chilling Units is not normally opened, handpiece Water Chilling Units correction module stops opening handpiece Water Chilling Units, and error message is sent to control unit and reports to the police; If multiple stage handpiece Water Chilling Units cooperation, then handpiece Water Chilling Units control module controls the unlatching of next handpiece Water Chilling Units, and repeats this operation logic.
Further, in step (2), cooling tower control module connects a fan frequency converter, after cooling tower control module opens cooling tower gauge tap and inlet valve, fan frequency converter becomes large until power frequency gradually by low frequency, and then according to the temperature difference setting value adjustment frequency converter frequency of cooling water leaving water temperature with the wet-bulb temperature of air, until cooling water leaving water temperature is with the temperature difference setting value of the actual temperature difference convergence cooling tower circulatory system of the wet-bulb temperature of air; If multiple stage cooling tower cooperation, then when cooling water leaving water temperature follows the temperature difference of the wet-bulb temperature of air to be less than temperature difference setting value but the operation of separate unit cooling tower can not meet regulatory demand, control unit, by the operation result of arithmetic element, opens new operation combination; Temperature difference setting value is 5-15 DEG C.
Further, in step (3), chilled water pump control module connects a chilled water pump frequency converter, when chilled water pump control module opens the gauge tap of chilled water pump, chilled water pump frequency converter becomes large until power frequency gradually by low frequency, and then according to the frequency of chilled water for the temperature difference setting value adjustment chilled water pump frequency converter of backwater, until chilled water is for the temperature difference setting value of the actual temperature approach convergence chilled water circuit of backwater; If multiple stage chilled water pump cooperation, then when chilled water supplies the actual temperature approach of backwater to be less than temperature difference setting value but the operation of separate unit chilled water pump can not meet regulatory demand, control unit, by the operation result of arithmetic element, opens new operation combination; Temperature difference setting value is 5-15 DEG C.
Further, in step (4), cooling water pump connects a cooling water pump frequency converter, when cooling water pump control module opens the gauge tap of cooling water pump, cooling water pump frequency converter becomes large until power frequency gradually by low frequency, and then according to the frequency of cooling water for the temperature difference setting value adjustment cooling water pump frequency converter of backwater, until cooling water is for the temperature difference setting value of the actual temperature approach convergence chilled(cooling) water return (CWR) of backwater; If multiple stage cooling water pump cooperation, then when cooling water supplies the actual temperature approach of backwater to be less than temperature difference setting value but the operation of separate unit cooling water pump can not meet regulatory demand, control unit, by the operation result of arithmetic element, opens new operation combination; Temperature difference setting value is 5-15 DEG C.
Further, control unit controls handpiece Water Chilling Units control module and first opens electric butterfly valve, after electric butterfly valve is normally opened, control unit control chilled water pump control module, cooling water pump control module, cooling tower control module open the gauge tap of the gauge tap of cooling tower, the gauge tap of chilled water pump and cooling water pump successively, after cooling tower, chilled water pump and cooling water pump are all normally opened, control unit controls the gauge tap that handpiece Water Chilling Units control module opens handpiece Water Chilling Units; During closing control system, control module first controls handpiece Water Chilling Units control module, cooling water pump control module, chilled water pump control module, cooling tower control module close handpiece Water Chilling Units successively gauge tap, the gauge tap of cooling water pump, the gauge tap of chilled water pump, the gauge tap of cooling tower, after handpiece Water Chilling Units, cooling water pump, chilled water pump, cooling tower are all normally closed, control unit controls handpiece Water Chilling Units control module and closes electric butterfly valve.
Compared with prior art, the invention has the advantages that: the efficiency Intelligent Optimal control system of central air-conditioning of the present invention can follow the tracks of the large subitem electrical equipment electricity consumption data of central air conditioner system five by Real-Time Monitoring for a long time, as: power consumption, electrical power, electric load rate, supply and return water temperature, discharge, semen donors, the instant coefficient of performance of cooling-water machine, cooling-water machine runs average behavior coefficient, to itemize instant efficiency, the core datas such as the instant efficiency of system and the average efficiency of system, and these data are gone to compare with country or international scale (i.e. setting value), evaluate the efficiency grade of each loop of central air conditioner system, again according to these large data, formulate automatic control scheme, thus make the operation of central air conditioner system reach a satisfied energy-saving effect.The efficiency of the large control system of the automatic tracking evaluation central air conditioner system five of efficiency Intelligent Optimal control system energy of central air-conditioning of the present invention, and select suitable control strategy according to these evaluation results, make the efficiency of central air conditioner system reach optimum.
Accompanying drawing explanation
In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in detailed description of the invention or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the module frame chart of the embodiment of the present invention;
Fig. 2 is the logic control schematic diagram of embodiment of the present invention control unit.
Detailed description of the invention
Carry out clear, complete description below with reference to accompanying drawing to the technical scheme of various embodiments of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope that the present invention protects.
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.As shown in Figure 1, a kind of efficiency Intelligent Optimal control system of central air-conditioning, comprising: collecting unit, monitoring means, arithmetic element, control unit and display unit; Collecting unit is for gathering the data parameters of handpiece Water Chilling Units cooling cycle system, the chilled water circulatory system, cooling water recirculation system, the cooling tower circulatory system and the air conditioning terminal circulatory system; Collecting unit comprises one or more in electric energy meter, power transducer, flow transmitter, temperature transmitter, humidity transmitter, for monitoring the temperature of central air-conditioning, power, power consumption, cold, humidity, efficiency and indoor and outdoor surroundings parameter; Monitoring means is connected with collecting unit, for monitoring collecting unit, to obtain monitoring result; Arithmetic element is connected with monitoring means, and the data operation for monitoring according to monitoring means goes out rate of load condensate and the efficiency of whole central air conditioner system and handpiece Water Chilling Units cooling cycle system, the chilled water circulatory system, cooling water recirculation system, the cooling tower circulatory system and the air conditioning terminal circulatory system; Control unit is connected with arithmetic element, Rule of judgment is preset for judging whether operation result meets, and when meeting default Rule of judgment, adopt the control strategy corresponding with default Rule of judgment to control the operation of handpiece Water Chilling Units cooling cycle system, the chilled water circulatory system, cooling water recirculation system and the cooling tower circulatory system; Display unit connection control unit, for showing the real-time running state of whole central air conditioner system and handpiece Water Chilling Units cooling cycle system, the chilled water circulatory system, cooling water recirculation system, the air conditioning terminal circulatory system and the cooling tower circulatory system, rate of load condensate, efficiency and efficiency grade.
Collecting unit comprises handpiece Water Chilling Units cooling cycle system collecting unit, water unit cooling cycle system collecting unit, chilled water circulatory system collecting unit, cooling water recirculation system collecting unit, air conditioning terminal circulatory system collecting unit and cooling tower circulatory system collecting unit.Handpiece Water Chilling Units cooling cycle system collecting unit comprises power transducer, electric energy meter, flow transmitter, temperature transmitter and heat energy transmitter; Power transducer is for gathering the power of handpiece Water Chilling Units cooling cycle system refrigeration unit; Electric energy meter is for gathering the power consumption of handpiece Water Chilling Units cooling cycle system refrigeration unit; Flow transmitter is for gathering the discharge of handpiece Water Chilling Units cooling cycle system refrigeration unit; Temperature transmitter is for gathering the Inlet and outlet water temperature of handpiece Water Chilling Units cooling cycle system refrigeration unit; Heat energy transmitter is for gathering the refrigerating capacity of handpiece Water Chilling Units cooling cycle system.Chilled water circulatory system collecting unit comprises power transducer and electric energy meter; Power transducer is for gathering the power of chilled water circulatory system water pump; Electric energy meter is for gathering the power consumption of chilled water circulatory system water pump.Cooling water recirculation system collecting unit comprises power transducer and electric energy meter; Power transducer is for gathering the power of cooling water recirculation system water pump; Electric energy meter is for gathering the power consumption of cooling water recirculation system water pump.Air conditioning terminal circulatory system collecting unit comprises power transducer and electric energy meter; Power transducer is for gathering the power of air conditioning terminal circulatory system blower fan; Electric energy meter is for gathering the power consumption of air conditioning terminal circulatory system blower fan.Cooling tower circulatory system collecting unit comprises power transducer, electric energy meter, temperature transmitter and humidity transmitter; Power transducer is for gathering the power of cooling tower circulatory system blower fan; Electric energy meter is for gathering the power consumption of cooling tower circulatory system blower fan; Temperature transmitter is for gathering the temperature of cooling tower circulatory system environment; Humidity transmitter is for gathering the humidity of cooling tower circulatory system environment.
Monitoring means is for monitoring collecting unit and the data of collecting unit collection being transferred to arithmetic element, and arithmetic element goes out the rate of load condensate of whole central air conditioner system and handpiece Water Chilling Units cooling cycle system, the chilled water circulatory system, cooling water recirculation system, the air conditioning terminal circulatory system and the grade cooling tower circulatory system and efficiency according to the data operation that monitoring means is monitored and is transferred to control unit; Control unit judges whether operation result meets and presets Rule of judgment, and when meeting default Rule of judgment, adopt the control strategy corresponding with default Rule of judgment to control the operation of handpiece Water Chilling Units cooling cycle system, the chilled water circulatory system, cooling water recirculation system, the air conditioning terminal circulatory system and the cooling tower circulatory system; Display unit connection control unit, for showing the real-time running state of whole central air conditioner system and handpiece Water Chilling Units cooling cycle system, the chilled water circulatory system, cooling water recirculation system, the air conditioning terminal circulatory system and the grade cooling tower circulatory system, rate of load condensate and efficiency grade.
Preferably, also comprise receiving element, be connected with control unit, for receiving the control strategy of user's input, and/or for receiving the default Rule of judgment of user's input.
Preferably, control unit comprises handpiece Water Chilling Units control module, handpiece Water Chilling Units correction module, chilled water pump control module, chilled water pump correction module, cooling water pump control module, cooling water pump correction module, cooling tower control module, cooling tower correction module and team control module; Handpiece Water Chilling Units control module connects handpiece Water Chilling Units, and for the opening and closing of the electric butterfly valve and unit itself that control handpiece Water Chilling Units cooling water and chilled water feed pipe, handpiece Water Chilling Units correction module is for feeding back the real-time status of handpiece Water Chilling Units to control unit; Chilled water pump control module connects the gauge tap of chilled water pump, and for controlling the opening and closing of chilled water pump gauge tap, chilled water pump correction module is for feeding back the real-time status of chilled water pump to control unit; Cooling water pump control module connects the gauge tap of cooling water pump, and for the opening and closing of controlled cooling model water pump gauge tap, cooling water pump correction module is for feeding back the real-time status of cooling water pump to control unit; Cooling tower control module connects the gauge tap of cooling tower, and for the opening and closing of the inlet valve of controlled cooling model tower gauge tap and cooling tower, cooling tower correction module is for feeding back the real-time status of cooling tower and inlet valve to control unit; Control unit controls team control module according to the Real-time Load rate of arithmetic element computing and adds machine or subtract machine.
Preferably, handpiece Water Chilling Units cooling cycle system comprises refrigeration controler, refrigeration controler is for regulating the water outlet temperature setting value of handpiece Water Chilling Units, and handpiece Water Chilling Units control module connects refrigeration controler, for passing through the automatic adjusting water outlet desired temperature of handpiece Water Chilling Units control module.
The air conditioning terminal circulatory system comprises chilled water for return pipe control system; Chilled water is for return pipe control system waterway controlling valve, when chilled water when 80% supplies the waterway controlling valve aperture of return pipe control system to be all less than 100% aperture, handpiece Water Chilling Units control module controls refrigeration controler and the water outlet temperature setting value of handpiece Water Chilling Units is improved 1 DEG C, and stablizes 20 minutes; If the chilled water of 80% is less than 100% for the waterway controlling valve aperture of return pipe control system, the water outlet temperature setting value that handpiece Water Chilling Units control module controls handpiece Water Chilling Units improves 1 DEG C, and logic like this is carried out; Otherwise the fan coil electrically operated valve aperture more than 20% is 100%, handpiece Water Chilling Units control module controls refrigeration controler and the water outlet temperature setting value of handpiece Water Chilling Units is reduced by 1 DEG C, until return back to initial set value; So implement logic to perform.
A control method for the efficiency Intelligent Optimal control system of central air-conditioning described above, comprises the following steps:
(1) the handpiece Water Chilling Units control module of control unit controls the electric butterfly valve of handpiece Water Chilling Units cooling water and chilled water water inlet pipe and water outlet pipe, if electric butterfly valve is not normally opened, handpiece Water Chilling Units correction module gives the alarm, and stops opening electric butterfly valve, and error message is sent to control unit; If multiple stage handpiece Water Chilling Units cooperation, handpiece Water Chilling Units control module controls the electric butterfly valve opening next handpiece Water Chilling Units, and repeats this operation logic;
(2) after the electric butterfly valve of handpiece Water Chilling Units is normally opened, the cooling tower control module controlled cooling model tower gauge tap of control unit and the inlet valve of cooling tower are opened, if cooling tower and inlet valve are not all normally opened, cooling tower correction module gives the alarm, and stops opening cooling tower gauge tap and closing inlet valve; If multiple stage cooling tower cooperation, cooling tower control module controls gauge tap and the inlet valve of opening next cooling tower, and repeats this operation logic;
(3), after cooling tower is normally opened, the chilled water pump control module of control unit controls the gauge tap unlatching of chilled water pump, if chilled water pump is not normally opened, chilled water pump correction module gives the alarm, and stops opening chilled water pump gauge tap; If multiple stage chilled water pump cooperation, chilled water pump control module controls next chilled water pump and opens, and repeats this operation logic;
(4) after chilled water pump is normally opened, the gauge tap of the cooling water pump control module controlled cooling model water pump of control unit is opened, if cooling water pump is not normally opened, cooling water pump correction module gives the alarm, and stops opening cooling water pump gauge tap; If multiple stage cooling water pump cooperation, cooling water pump control module controls next chilled water pump and opens, and repeats this operation logic;
(5) after cooling water pump is normally opened, the handpiece Water Chilling Units control module of control unit controls handpiece Water Chilling Units and opens, if handpiece Water Chilling Units is not normally opened, handpiece Water Chilling Units correction module stops opening handpiece Water Chilling Units, and error message is sent to control unit and reports to the police; If multiple stage handpiece Water Chilling Units cooperation, then handpiece Water Chilling Units control module controls the unlatching of next handpiece Water Chilling Units, and repeats this operation logic.
Preferably, in step (2), cooling tower control module connects a fan frequency converter, by the cooling blower of fan frequency converter controlled cooling model tower; When cooling tower control module opens cooling tower gauge tap and inlet valve, fan frequency converter becomes large until power frequency gradually by low frequency, and then according to the temperature difference setting value adjustment frequency converter frequency of cooling water leaving water temperature with the wet-bulb temperature of air, until cooling water leaving water temperature is with the temperature difference setting value of the actual temperature difference convergence cooling tower circulatory system of the wet-bulb temperature of air; If multiple stage cooling tower cooperation, then when cooling water leaving water temperature follows the temperature difference of the wet-bulb temperature of air to be less than temperature difference setting value but the operation of separate unit cooling tower can not meet regulatory demand, control unit, by the operation result of arithmetic element, opens new operation combination; Temperature difference setting value is 5-15 DEG C.
Preferably, in step (3), chilled water pump control module connects a chilled water pump frequency converter, the flow of chilled water pump Frequency Converter Control chilled water pump; When chilled water pump control module opens the gauge tap of chilled water pump, chilled water pump frequency converter becomes large until power frequency gradually by low frequency, and then according to the frequency of chilled water for the temperature difference setting value adjustment chilled water pump frequency converter of backwater, until chilled water is for the temperature difference setting value of the actual temperature approach convergence chilled water circuit of backwater; If multiple stage chilled water pump cooperation, then when chilled water supplies the actual temperature approach of backwater to be less than temperature difference setting value but the operation of separate unit chilled water pump can not meet regulatory demand, control unit, by the operation result of arithmetic element, opens new operation combination; Temperature difference setting value is 5-15 DEG C.
Preferably, in step (4), cooling water pump connects a cooling water pump frequency converter, the flow of cooling water pump Frequency Converter Control cooling water pump; When cooling water pump control module opens the gauge tap of cooling water pump, cooling water pump frequency converter becomes large until power frequency gradually by low frequency, and then according to the frequency of cooling water for the temperature difference setting value adjustment cooling water pump frequency converter of backwater, until cooling water is for the temperature difference setting value of the actual temperature approach convergence chilled(cooling) water return (CWR) of backwater; If multiple stage cooling water pump cooperation, then when cooling water supplies the actual temperature approach of backwater to be less than temperature difference setting value but the operation of separate unit cooling water pump can not meet regulatory demand, control unit, by the operation result of arithmetic element, opens new operation combination; Temperature difference setting value is 5-15 DEG C.
Preferably, control unit controls handpiece Water Chilling Units control module and first opens electric butterfly valve, after electric butterfly valve is normally opened, control unit control chilled water pump control module, cooling water pump control module, cooling tower control module open the gauge tap of the gauge tap of cooling tower, the gauge tap of chilled water pump and cooling water pump successively, after cooling tower, chilled water pump and cooling water pump are all normally opened, control unit controls the gauge tap that handpiece Water Chilling Units control module opens handpiece Water Chilling Units; During closing control system, control module first controls handpiece Water Chilling Units control module, cooling water pump control module, chilled water pump control module, cooling tower control module close handpiece Water Chilling Units successively gauge tap, the gauge tap of cooling water pump, the gauge tap of chilled water pump, the gauge tap of cooling tower, after handpiece Water Chilling Units, cooling water pump, chilled water pump, cooling tower are all normally closed, control unit controls handpiece Water Chilling Units control module and closes electric butterfly valve.
The handpiece Water Chilling Units that multiple stage is run is run exists most effective operation combination, draws after this efficiency Intelligent Optimal control system being combined through this central air-conditioning runs the some time; Multiple stage run handpiece Water Chilling Units add machine or subtract machine according to load meet and efficiency comes first carry out.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, the any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (9)
1. an efficiency Intelligent Optimal control system for central air-conditioning, is characterized in that, comprising: collecting unit, monitoring means, arithmetic element, control unit and display unit;
Described collecting unit is for gathering the data parameters of handpiece Water Chilling Units cooling cycle system, the chilled water circulatory system, cooling water recirculation system, the cooling tower circulatory system and the air conditioning terminal circulatory system; Described collecting unit comprises one or more in electric energy meter, power transducer, flow transmitter, temperature transmitter, humidity transmitter, for monitoring the temperature of central air-conditioning, power, power consumption, cold, humidity, efficiency and indoor and outdoor surroundings parameter;
Described monitoring means is connected with described collecting unit, for monitoring described collecting unit, to obtain monitoring result;
Described arithmetic element is connected with described monitoring means, and the data operation for monitoring according to described monitoring means goes out rate of load condensate and the efficiency of whole central air conditioner system and handpiece Water Chilling Units cooling cycle system, the chilled water circulatory system, cooling water recirculation system, the cooling tower circulatory system and the air conditioning terminal circulatory system;
Described control unit is connected with described arithmetic element, Rule of judgment is preset for judging whether described operation result meets, and when meeting described default Rule of judgment, adopt the control strategy corresponding with described default Rule of judgment to control the operation of handpiece Water Chilling Units cooling cycle system, the chilled water circulatory system, cooling water recirculation system and the cooling tower circulatory system;
Described display unit connects described control unit, for showing the real-time running state of whole central air conditioner system and handpiece Water Chilling Units cooling cycle system, the chilled water circulatory system, cooling water recirculation system, the air conditioning terminal circulatory system and the cooling tower circulatory system, rate of load condensate, efficiency and efficiency grade.
2. the efficiency Intelligent Optimal control system of central air-conditioning as claimed in claim 1, it is characterized in that: also comprise receiving element, be connected with described control unit, for receiving the control strategy of user's input, and/or for receiving the default Rule of judgment of user's input.
3. the efficiency Intelligent Optimal control system of central air-conditioning as claimed in claim 1, is characterized in that: described control unit comprises handpiece Water Chilling Units control module, handpiece Water Chilling Units correction module, chilled water pump control module, chilled water pump correction module, cooling water pump control module, cooling water pump correction module, cooling tower control module, cooling tower correction module and team control module; Described handpiece Water Chilling Units control module connects handpiece Water Chilling Units, for the opening and closing of the electric butterfly valve and unit itself that control handpiece Water Chilling Units cooling water and chilled water feed pipe, described handpiece Water Chilling Units correction module is for feeding back the real-time status of described handpiece Water Chilling Units and electric butterfly valve to described control unit; Described chilled water pump control module connects the gauge tap of chilled water pump, and for controlling the opening and closing of chilled water pump gauge tap, described chilled water pump correction module is for feeding back the real-time status of chilled water pump to described control unit; Described cooling water pump control module connects the gauge tap of cooling water pump, and for the opening and closing of controlled cooling model water pump gauge tap, described cooling water pump correction module is for feeding back the real-time status of cooling water pump to described control unit; Described cooling tower control module connects the gauge tap of described cooling tower, for the opening and closing of the inlet valve of controlled cooling model tower gauge tap and cooling tower, described cooling tower correction module is for feeding back the real-time status of cooling tower and inlet valve to described control unit; Described control unit controls described team control module according to the Real-time Load rate of described arithmetic element computing and adds machine or subtract machine.
4. the efficiency Intelligent Optimal control system of central air-conditioning as claimed in claim 3, it is characterized in that: described handpiece Water Chilling Units cooling cycle system comprises refrigeration controler, described refrigeration controler is for regulating the water outlet temperature setting value of described handpiece Water Chilling Units, described handpiece Water Chilling Units control module connects described refrigeration controler, for by the automatic adjusting water outlet desired temperature of described handpiece Water Chilling Units control module.
5. a control method for the efficiency Intelligent Optimal control system of the central air-conditioning as described in as arbitrary in claim 1-4, is characterized in that, comprise the following steps:
(1) the handpiece Water Chilling Units control module of control unit controls the electric butterfly valve of handpiece Water Chilling Units cooling water and chilled water water inlet pipe and water outlet pipe, if electric butterfly valve is not normally opened, described handpiece Water Chilling Units correction module gives the alarm, and stops opening electric butterfly valve, and error message is sent to control unit; If multiple stage handpiece Water Chilling Units cooperation, handpiece Water Chilling Units control module controls the electric butterfly valve opening next handpiece Water Chilling Units, and repeats this operation logic;
(2) after the electric butterfly valve of handpiece Water Chilling Units is normally opened, the cooling tower control module controlled cooling model tower gauge tap of described control unit and the inlet valve of cooling tower are opened, if cooling tower and inlet valve are not all normally opened, cooling tower correction module gives the alarm, and stops opening cooling tower gauge tap and closing inlet valve; If multiple stage cooling tower cooperation, cooling tower control module controls gauge tap and the inlet valve of opening next cooling tower, and repeats this operation logic;
(3), after cooling tower is normally opened, the chilled water pump control module of described control unit controls the gauge tap unlatching of chilled water pump, if chilled water pump is not normally opened, chilled water pump correction module gives the alarm, and stops opening chilled water pump gauge tap; If multiple stage chilled water pump cooperation, described chilled water pump control module controls next chilled water pump and opens, and repeats this operation logic;
(4) after chilled water pump is normally opened, the gauge tap of the cooling water pump control module controlled cooling model water pump of described control unit is opened, if cooling water pump is not normally opened, cooling water pump correction module gives the alarm, and stops opening cooling water pump gauge tap; If multiple stage cooling water pump cooperation, described cooling water pump control module controls next chilled water pump and opens, and repeats this operation logic;
(5) after cooling water pump is normally opened, the handpiece Water Chilling Units control module of described control unit controls handpiece Water Chilling Units and opens, if handpiece Water Chilling Units is not normally opened, handpiece Water Chilling Units correction module stops opening handpiece Water Chilling Units, and error message is sent to control unit and reports to the police; If multiple stage handpiece Water Chilling Units cooperation, then handpiece Water Chilling Units control module controls the unlatching of next handpiece Water Chilling Units, and repeats this operation logic.
6. the control method of the efficiency Intelligent Optimal control system of central air-conditioning as claimed in claim 5, it is characterized in that: in step (2), described cooling tower control module connects a fan frequency converter, after cooling tower control module opens cooling tower gauge tap and inlet valve, fan frequency converter becomes large until power frequency gradually by low frequency, and then follow the temperature difference setting value of the wet-bulb temperature of air to adjust described frequency converter frequency according to cooling water leaving water temperature, until cooling water leaving water temperature is with the temperature difference setting value of the actual temperature difference convergence cooling tower circulatory system of the wet-bulb temperature of air, if multiple stage cooling tower cooperation, then when cooling water leaving water temperature follows the temperature difference of the wet-bulb temperature of air to be less than temperature difference setting value but the operation of separate unit cooling tower can not meet regulatory demand, control unit, by the operation result of arithmetic element, opens new operation combination, temperature difference setting value is 5-15 DEG C.
7. the control method of the efficiency Intelligent Optimal control system of central air-conditioning as claimed in claim 5, it is characterized in that: in step (3), described chilled water pump control module connects a chilled water pump frequency converter, when described chilled water pump control module opens the gauge tap of chilled water pump, chilled water pump frequency converter becomes large until power frequency gradually by low frequency, and then according to the frequency of chilled water for the temperature difference setting value adjustment chilled water pump frequency converter of backwater, until chilled water is for the temperature difference setting value of the actual temperature approach convergence chilled water circuit of backwater; If multiple stage chilled water pump cooperation, then when chilled water supplies the actual temperature approach of backwater to be less than temperature difference setting value but the operation of separate unit chilled water pump can not meet regulatory demand, control unit, by the operation result of arithmetic element, opens new operation combination; Temperature difference setting value is 5-15 DEG C.
8. the control method of the efficiency Intelligent Optimal control system of central air-conditioning as claimed in claim 5, it is characterized in that: in step (4), described cooling water pump connects a cooling water pump frequency converter, when described cooling water pump control module opens the gauge tap of cooling water pump, cooling water pump frequency converter becomes large until power frequency gradually by low frequency, and then according to the frequency of cooling water for the temperature difference setting value adjustment cooling water pump frequency converter of backwater, until cooling water is for the temperature difference setting value of the actual temperature approach convergence chilled(cooling) water return (CWR) of backwater; If multiple stage cooling water pump cooperation, then when cooling water supplies the actual temperature approach of backwater to be less than temperature difference setting value but the operation of separate unit cooling water pump can not meet regulatory demand, control unit, by the operation result of arithmetic element, opens new operation combination; Temperature difference setting value is 5-15 DEG C.
9. the control method of the efficiency Intelligent Optimal control system of central air-conditioning as claimed in claim 5, it is characterized in that: described control unit controls handpiece Water Chilling Units control module and first opens electric butterfly valve, after electric butterfly valve is normally opened, described control unit controls chilled water pump control module, cooling water pump control module, cooling tower control module opens the gauge tap of cooling tower successively, the gauge tap of chilled water pump and the gauge tap of cooling water pump, work as cooling tower, after chilled water pump and cooling water pump are all normally opened, described control unit controls the gauge tap that handpiece Water Chilling Units control module opens described handpiece Water Chilling Units, during closing control system, described control module first controls handpiece Water Chilling Units control module, cooling water pump control module, chilled water pump control module, cooling tower control module close handpiece Water Chilling Units successively gauge tap, the gauge tap of cooling water pump, the gauge tap of chilled water pump, the gauge tap of cooling tower, after handpiece Water Chilling Units, cooling water pump, chilled water pump, cooling tower are all normally closed, described control unit controls handpiece Water Chilling Units control module and closes electric butterfly valve.
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