CN102374605A - Automatic optimizing energy-saving technology and system for central air-conditioning water system - Google Patents
Automatic optimizing energy-saving technology and system for central air-conditioning water system Download PDFInfo
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Abstract
The invention discloses an automatic optimizing energy-saving technology and an automatic optimizing energy-saving system for a central air-conditioning water system. The technology comprises the following steps of: acquiring running parameters and running state of the central air-conditioning circulation water system automatically by using an automatic control system; storing the running parameters and the running states to a database of the automatic control system, and concluding, calculating and adjusting automatically by using the automatic control system to acquire the optimum running parameters of related equipment of the central air-conditioning circulation water system; and according to the parameters, controlling the optimized running of the related equipment of the integral central air-conditioning circulation water system under different working conditions and in different load states. By the scheme, the power consumption of the equipment of the central air-conditioning water system is saved greatly, the running efficiency of the equipment is improved, and the loss of the equipment is reduced, so a large amount of energy is saved.
Description
Technical field
Patent of the present invention relates to electric automatization and automation field, HVAC industry field, specifically is a kind ofly to seek the power-saving technology of optimized control strategy to the center air-condition circle water system automatically according to practical operation situation.
Background technology
As everyone knows; The center air-condition circle water system can be used as one on the whole; Be exactly the equipment that a cover is made chilled water, whole circulation system is more ceaselessly to the cold water of the fan coil outputting standard temperature of interior of building, thereby gives the air cooling of whole interior of building.Simultaneously, the center air-condition circle water system is made up of with refrigerating water pump, coolant pump and the cooling tower etc. of different sizes many freezing main frames (refrigeration host computer) not of uniform size, and these equipment all have different working operational efficiency curve separately; Each different equipment all has the operating condition of the best of " most effective, minimum to wear and tear in machines " under different situations simultaneously.Producer has often only provided operation curve and the parameter under the standard condition of each equipment, also can provide the most effective optimal operating parameter under the standard condition simultaneously.
But, be difficult to accomplish operation under standard condition fully in the center air-condition circle water system actual items.Reality is: after the equipment that disperses is combined into a complete central air conditioner system; Because the variation of conversion in season and operating load; And the change of the design parameter in the real air-conditioning system, add the diversity and the complexity of pipe network system, thereby cause optimal operating condition often to be destroyed.Along with the variation of operational factor and load, only just be difficult to find the optimal operational condition of certain equipment or whole central air conditioner system most equipment by rule of thumb with sensation.
The personnel of interior of building are in mobile, required temperature load earthquake; Outdoor temperature and humidity are also changing simultaneously; Also have the more multifactor of other changing; Thereby cause the load of whole center air-condition circle water system changing, its supply backwater temperature difference, flow, pressure reduction or the like are all ceaselessly changing, and then the equipment operating condition that has influence on circulation changes.Under so continuous variable condition; Should open how many freezing main frames, how many refrigerating water pumps, how many coolant pumps and how many cooling towers actually? Should open big machine actually? Or little machine? Usually; The air-conditioning man rule of thumb goes to judge, air-conditioning man's opening device, yet neither one foundation accurately as to when simultaneously is not to have opened early, be exactly out late; Not to have opened greatly, open little exactly.So just cause each equipment of center air-condition circle water system not guarantee fully to operate under the optimum condition, thus the waste that has produced a large amount of energy.
Also has more serious problem.The energy conserving system that has occurred now the frequency control of a lot of single control parameters on the market, the running frequency that they often just remove to adjust water pump according to some simple logics changes the flow of center air-condition circle water system, and refrigeration host computer is not but adjusted.Under such state, though can reduce the operation power consumption of water pump, many times, the frequency conversion system that has can cause the optimal operational condition of refrigeration host computer to be destroyed, and is the refrigerating efficiency that has reduced refrigeration host computer in fact, has increased the power consumption of refrigeration host computer; Under the worst situation, then can cause refrigeration host computer to breathe heavily shake, even the frozen pipe fault takes place.Though whole central air conditioner system has the electric-saving efficiency of some, the life-span of refrigeration host computer and relevant device shortens greatly, maintenance cost increases, and loses more than gain often.
Fortunately present automatic control technology is very advanced, and we can be to reach purpose of energy saving.
Summary of the invention
To the problems referred to above; The present invention aims to provide a kind of central air conditioning water system automatic optimal power-economizing method; Simultaneously, a kind of system that realizes this method is provided also, to equipment automatic control system and monitoring system and relevant senser element is installed in the hope of passing through; Be used for finding automatically the optimal operating parameter of whole central air conditioner system under different operating modes and load, thereby make the whole system performance maximal efficiency of central air-conditioning.
For realizing this technical purpose, scheme of the present invention is:
A kind of central air conditioning water system automatic optimal power-economizing method is characterized in that:
Adopt automatic control system to come to gather automatically the operational factor and the running status of center air-condition circle water system;
Store in the database of automatic control system,, draw the operational factor of the best of the relevant device of center air-condition circle water system through automatic conclusion, calculating and the adjustment of automatic control system;
According to above-mentioned parameter, control the optimized operation of relevant device under different working conditions and load condition of whole center air-condition circle water system.
As improving more specifically, optimal operating parameter is downloaded in the field controller automatically, by the field controller automatic operation of the whole central air-conditioning circularly cooling water system relevant device of control automatically.
A kind of central air conditioning water system automatic optimal energy conserving system is characterized in that comprising upper main control system, network controller, electric quantity acquisition controller, wherein:
Upper main control system is connected with electric quantity collector controller difference data with network controller;
The electric quantity acquisition controller is responsible for the exchanges data between electric quantity collector and the upper main control system, and this controller connects the electric quantity collector that disperses distinct device through the electric quantity acquisition network, comprises refrigeration host computer, refrigerating water pump, coolant pump, cooling tower electric quantity collector;
Network controller is responsible for connecting field control network and upper main control system; This controller connects the field controller that is dispersed in distinct device through the field control network, comprises the field controller of refrigeration host computer, refrigerating water pump, coolant pump, cooling tower;
Said electric quantity collector is responsible for gathering the electrical parameter of relevant device, and said field controller is responsible for gathering the signal and the parameter of relevant device, and the output control instruction is with the operation of control relevant device.
As improving more specifically, upper main control system, network controller and field controller are to connect to form through the RS485 fieldbus.
As improving more specifically, said network controller also connects refrigeration host computer network communication gateway, and the data acquisition and the control signal input/output port of refrigeration host computer inserted upper main control system.
This programme can make the ratio (being the whole COP value of center air-condition circle water system) of integrally cooling amount and whole power consumption of center air-condition circle water system as finally considering a little, accumulates, concludes and calculate best overall COP value automatically by the control system.Again with " best overall COP value " as the control strategy of center air-condition circle water entire system, go to control the operation of each equipment of center air-condition circle water system, to reach the purpose of optimized running.On the basis of identical refrigerating capacity, than the manually operated central air conditioning water system of tradition, saved the power consumption of the equipment of central air conditioning water system greatly, improved equipment operational efficiency, reduced the loss of equipment, thereby saved a large amount of energy.
Description of drawings
Fig. 1 is a structural representation block diagram of the present invention.
Wherein 1 is upper main control system, and 2 is network controller, and 21～24 is field controller, and 25 are the field control network, and 3 is the refrigeration host computer gateway, and 4 is the electric quantity acquisition controller, and 41～44 is electric quantity collector, and 45 is the electric quantity collector network.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is explained further details.
A kind of central air conditioning water system automatic optimal power-economizing method of the present invention adopts automatic control system to gather automatically the operational factor and the running status of center air-condition circle water system; Store in the database of automatic control system,, draw the operational factor of the best of the relevant device of center air-condition circle water system through automatic conclusion, calculating and the adjustment of automatic control system; According to above-mentioned parameter, control the optimized operation of relevant device under different working conditions and load condition of whole center air-condition circle water system.Optimal operating parameter is downloaded in the field controller automatically, by the field controller automatic operation of the whole central air-conditioning circularly cooling water system relevant device of control automatically.
As shown in Figure 1; It is a kind of central air conditioning water system automatic optimal energy conserving system of the present invention; Adopt the operational factor and the signal of the Programmable Logic Controller collection site air-conditioning system equipment of band field network function; Be transferred to and do integral operation in the upper control computer; Monitoring, conclusion, storage, calculating and processing can obtain the whole refrigerating capacity of center air-condition circle water system under different cooling water temperatures and cooling load and the actual ratio of electrical power, i.e. " the COP value under the actual motion state ".Simultaneously through this " the COP value under the actual motion state " done computing, the accumulating of automatic optimal energy conserving system, the value of looking into, comparison, conclude and do the error adjustment, thereby can find out " the best actual motion COP value " of best cooling water temperature and center air-condition circle water system.Collect, conclude and calculating " whole COP value " point through the continuous data of automatic optimal control energy conserving system, describe " whole COP value " curve, find the optimum operation operating point of " whole COP value " curve of whole central air conditioner system.In whole center air-condition circle water system; According to actual needs and in the light of actual conditions; Automatically adjust operating condition and running parameter through automatic optimal control energy conserving system; Automatically the start and stop of the center air-condition circle water system equipment of the different sizes of control and operation platform number, it comprises upper main control system, network controller, electric quantity acquisition controller, wherein:
Upper main control system is connected with electric quantity collector controller difference data with network controller;
The electric quantity acquisition controller is responsible for the exchanges data between electric quantity collector and the upper main control system, and this controller connects the electric quantity collector that disperses distinct device through the electric quantity acquisition network, comprises refrigeration host computer, refrigerating water pump, coolant pump, cooling tower electric quantity collector;
Network controller is responsible for connecting field control network and upper main control system; This controller connects the field controller that is dispersed in distinct device through the field control network, comprises the field controller of refrigeration host computer, refrigerating water pump, coolant pump, cooling tower;
Said electric quantity collector is responsible for gathering the electrical parameter of relevant device, and said field controller is responsible for gathering the signal and the parameter of relevant device, and the output control instruction is with the operation of control relevant device.
Upper main control system, network controller and field controller are to connect to form through the RS485 fieldbus; Network controller also connects refrigeration host computer network communication gateway, and the data acquisition and the control signal input/output port of refrigeration host computer inserted upper main control system.
System database, automatic computational logic, timetable logic, control model and control logic etc. are collaborative works together; Make that whole system can be according to the program fully automatic operation; And according to the dynamic logic control program according to the automatic equipment running in adjustment and the monitoring center air-condition circle water system automatically of dynamic variable, make automatic optimal control energy-conservation automatic generation and the control strategy under " best overall COP value " (the integrally cooling amount of central air-conditioning circularly cooling water system and ratio of whole power consumption) state be provided.Field control model and the logic of this control model, control logic and control strategy and field controller of upper control computer coordinates to control whole center air-condition circle water system overall operation under " best overall COP value " state automatically together.Whole system no longer is to consider single control parameter; Broken away from the limitation of single temperature difference control or pressure reduction control or flow-control; But " best overall COP value " parameter of whole consideration central air-conditioning circularly cooling water system; Merge parameters such as indoor and outdoor surroundings humiture, power consumption parameter, the temperature difference, pressure reduction and flow and done whole monitoring, calculating and adjustment; Make whole central air-conditioning circularly cooling water system reach the refrigerating efficiency of running status with the maximum of performance whole system of the best, thereby save the energy greatly.
Technical scheme of the present invention has been broken away from and popular on the market just paid attention to single control parameter or control infringement or the poor efficiency to whole center air-condition circle water system equipment that the automatic control technology of parameter is brought on a small quantity." fuzzy control technology ", " expert's control technology " and " alternating temperature difference control technology " or the like have been broken away from simultaneously, much many probabilistic factor of causing of other central air-conditioning automatic control technologys.Be one realistic by actual conditions, by the energy conserving system of the real optimization center air-condition circle water system equipment operation of demand control.
Concluded; This embodiment be exactly optimal operating condition with refrigeration host computer be the center; The start and stop of coordinating the equipment of the peripheral various different sizes of control refrigeration host computer move with optimizing; Automatically gather the integrally cooling amount and the whole power consumption of center air-condition circle water system; And calculating " best overall COP value " parameter automatically as a result of, the cold main frame of nonstick system of control is that main center air-condition circle water system reaches optimal operational condition, thereby searches out the control strategy under " best overall COP value " state of whole center air-condition circle water system.
System of the present invention can install additional and transform on the conventional central air-conditioning system of installation, also can in the design of the newly-built central air conditioner system in building, integrate.The practical implementation process is following:
1, on refrigeration host computer, installs the communications protocol converter additional, collect the main running state parameter data of every refrigeration host computer in the automatic optimal control energy conserving system to come.Simultaneously install leaving water temperature sensor, water flow sensor additional, install the return water temperature sensor additional at the chilled water of refrigeration host computer and the water return outlet of cooling water at the chilled water of every refrigeration host computer and the delivery port of cooling water; Simultaneously install the electric flux intelligent collector additional, comprise that the running state data of refrigeration host computer electric cabinet all inserts in the automatic optimal control energy conserving system to all these signals and parameter in the electric cabinet electric power incoming line position of refrigeration host computer.And be connected to upper control system host and database through the RS485 fieldbus.Do integral operation in the upper control computer, conclude, store, calculate and handle, we can obtain the refrigerating capacity of refrigeration host computer under different cooling water temperatures and cooling load and the ratio of electrical power, i.e. COP value under the actual motion state.Thereby can find out the best actual motion COP value of best cooling water temperature and refrigeration host computer, collect through the continuous data of automatic optimal control energy conserving system, we can find the best actual motion COP value of every refrigeration host computer.In whole center air-condition circle water system, according to actual needs, through automatic optimal control energy conserving system adjustment operating condition, the start and stop of the refrigeration host computer of the different sizes of control automatically, operation platform number.
2, delivery port and the water inlet at every cooling tower installs water temperature sensor additional; Install water flow sensor additional at every cooling tower delivery port; And the generated energy acquisition device is installed in the electric cabinet inlet wire position at every cooling tower; Comprise that the running state data of cooling tower electric cabinet inserts in the automatic optimal control energy conserving system to all these signals, and control the start and stop of every cooling tower through automatic optimal control energy conserving system.Through the continuous accumulation in early stage and the automatic calculating of automatic optimal control energy conserving system; Find the best cooling water leaving water temperature under the different load situation of different outdoor temperature humidities and refrigeration host computer; Thereby under different situations; Automatic optimal control energy conserving system is through conclude, calculate and handle the optimal operating condition of refrigeration host computer automatically; Thereby produce the operation that operating instruction is controlled the cooling tower of whole center air-condition circle water system, control the start and stop and operation platform number of the cooling tower of different sizes by automatic optimal control energy conserving system according to the best cooling water leaving water temperature of reality.
3, in the electric cabinet inlet wire position of every coolant pump the generated energy acquisition device is installed; Comprise that the running state data of coolant pump electric cabinet inserts in the automatic optimal control energy conserving system to all these signals, and control the start and stop of every coolant pump through automatic optimal control energy conserving system.Automatic optimal control energy conserving system is through conclude, calculate and handle the optimal operating condition of the refrigeration host computer under the different load automatically; Thereby produce the operation that operating instruction is controlled the coolant pump of whole center air-condition circle water system, comprise the start and stop and operation platform number of the coolant pump of every different sizes of control.Installed the energy-saving and frequency-variable system additional if any coolant pump, then controlled the converting operation of coolant pump, made converting operation no longer blindly through these data; Accomplishing can be energy-conservation; Can guarantee the optimal operational condition of refrigeration host computer again, be unlikely to damage refrigeration host computer, can also guarantee the efficient operation of refrigeration host computer.
4, same; The generated energy acquisition device is installed in electric cabinet inlet wire position at every refrigerating water pump; Comprise that the running state data of refrigerating water pump electric cabinet inserts in the automatic optimal control energy conserving system to all these signals, and control the start and stop of every refrigerating water pump through automatic optimal control energy conserving system.Automatic optimal control energy conserving system is through conclude, calculate and handle the optimal operating condition of the refrigeration host computer under the different load automatically; Thereby produce the operation that operating instruction is controlled the refrigerating water pump of whole center air-condition circle water system, comprise the start and stop and operation platform number of the refrigerating water pump of every different sizes of control.Installed the energy-saving and frequency-variable system additional if any refrigerating water pump, then controlled the converting operation of refrigerating water pump, made converting operation no longer blindly through these data; Accomplishing can be energy-conservation; Can guarantee the optimal operational condition of refrigeration host computer again, be unlikely to damage refrigeration host computer, can also guarantee the efficient operation of refrigeration host computer.
5, system's programming: on upper control computer, adopt database software platform and configuration platform to work out automatic computational logic and timetable logic; Set up control model and control logic; Make that whole system can be according to the program fully automatic operation, and adjust operation automatically according to dynamic variable according to the dynamic logic control program.Make automatic optimal control energy conserving system produce and provide the control strategy under " best overall COP value " (the integrally cooling amount of central air-conditioning circularly cooling water system and ratio of whole power consumption) state automatically.And download to field controller to this control model, control logic and control strategy automatically and control whole central air conditioner system and under " best overall COP value " state, move automatically.
6, data accumulation: whole system needs the period of an accumulation data; The variation of the operating load of the continuous variation through cooling water, the variation of indoor and outdoor humiture and whole air-conditioning system; In database, accumulate power consumption data, operational factor and the service data of whole system, be used to calculate " the whole COP value " of central air-conditioning circularly cooling water system.Constantly accumulative total, conclusion and calculating " whole COP value " point are described " whole COP value " curve, find the best operating point of " whole COP value " curve of whole central air conditioner system.
Scheme of the present invention obtains following technological merit through practice test:
A) control and calculate the COP value of central air-conditioning overall operation automatically, the control strategy of " best overall COP value " is provided.
B) the air-conditioning operating personnel can be according to the control strategy of " best overall COP value ", and equipment that step-by-step start and stop are not of uniform size and platform number reduce the human operational error.
C) also can control the operation of central air-conditioning circularly cooling water system by the control strategy of " automatic optimal energy conserving system " basis " best overall COP value " automatically.
D) because whole central air-conditioning circularly cooling water system moves according to " best overall COP value ", significantly reduced energy waste, thereby made central air-conditioning circularly cooling water system reach very high operational efficiency.
E) it is energy-conservation more than 15% that " automatic optimal energy conserving system " generally can make central air-conditioning circularly cooling water system, if be used whole group control energy-saving system and energy-saving and frequency-variable system, the fractional energy savings of refrigeration host computer (freezing main frame) reached more than 30%.
F) " automatic optimal energy conserving system " make the energy-saving and frequency-variable system has been installed control no longer blindly, make refrigeration host computer operate under the optimum condition, prolong the service life of the various air-conditioning equipments that comprise refrigeration host computer greatly.
G) " automatic optimal energy conserving system " make air-conditioning system various system equipments operation no longer blindly, the start and stop of the equipment of the different sizes of various air-conditioning systems and operation harmonious orderly make maintenance cost reduce greatly.
H) application of " automatic optimal power-saving technology ", started the center air-condition circle water system in the light of actual conditions, according to revolutionary New Times of demand status, the operation of realistic optimum optimization.
G) if " automatic optimal power-saving technology " cooperates my other two utility model patents to use together, can reach unprecedented energy-efficient.
Central air conditioner system is through after the reducing energy consumption of " automatic optimal power-saving technology ", and economic benefit and social benefit are all very obvious.For the control strategy of traditional central air conditioner system brings revolutionary technological progress.
The above; Be merely preferred embodiment of the present invention; Not in order to restriction the present invention, every foundation technical spirit of the present invention to any trickle modification that above embodiment did, be equal to replacement and improve, all should be included within the protection domain of technical scheme of the present invention.
Claims (5)
1. central air conditioning water system automatic optimal power-saving technology is characterized in that:
Adopt automatic control system to come to gather automatically the operational factor and the running status of center air-condition circle water system;
Store in the database of automatic control system,, draw the operational factor of the best of the relevant device of center air-condition circle water system through automatic conclusion, calculating and the adjustment of automatic control system;
According to above-mentioned parameter, control the optimized operation of relevant device under different working conditions and load condition of whole center air-condition circle water system.
2. method according to claim 1 is characterized in that, optimal operating parameter is downloaded in the field controller automatically, by the field controller automatic operation of the whole central air-conditioning circularly cooling water system relevant device of control automatically.
3. an automatic optimal energy conserving system of realizing method according to claim 1 and 2 is characterized in that comprising upper main control system, network controller, electric quantity acquisition controller, wherein:
Upper main control system is connected with electric quantity collector controller difference data with network controller;
The electric quantity acquisition controller is responsible for the exchanges data between electric quantity collector and the upper main control system, and this controller connects the electric quantity collector that disperses distinct device through the electric quantity acquisition network, comprises refrigeration host computer, refrigerating water pump, coolant pump, cooling tower electric quantity collector;
Network controller is responsible for connecting field control network and upper main control system; This controller connects the field controller that is dispersed in distinct device through the field control network, comprises the field controller of refrigeration host computer, refrigerating water pump, coolant pump, cooling tower;
Said electric quantity collector is responsible for gathering the electrical parameter of relevant device, and said field controller is responsible for gathering the signal and the parameter of relevant device, and the output control instruction is with the operation of control relevant device.
4. automatic optimal energy conserving system according to claim 2 is characterized in that, upper main control system, network controller and field controller are to connect to form through the RS485 fieldbus.
5. automatic optimal energy conserving system according to claim 3 is characterized in that, said network controller also connects refrigeration host computer network communication gateway, and the data acquisition and the control signal input/output port of refrigeration host computer inserted upper main control system.
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| CN102679496A (en) * | 2012-05-14 | 2012-09-19 | 赖正伦 | Load follow-up control method for central air conditioner |
| CN103970541A (en) * | 2014-05-22 | 2014-08-06 | 杭州劲力节能科技有限公司 | Online self-learning optimizing control method of vacuum salt production circulating water system |
| CN104534617A (en) * | 2014-12-08 | 2015-04-22 | 北京华电方胜技术发展有限公司 | Cold source centralized digital control method based on energy consumption monitoring |
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| CN105571063A (en) * | 2015-12-31 | 2016-05-11 | 深圳市同鑫热力技术有限公司 | Shallow geothermal energy source management system and implementation method thereof |
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| CN102679496A (en) * | 2012-05-14 | 2012-09-19 | 赖正伦 | Load follow-up control method for central air conditioner |
| CN102679496B (en) * | 2012-05-14 | 2016-07-06 | 赖正伦 | A kind of load follow-up control method for central air-conditioning |
| CN103970541B (en) * | 2014-05-22 | 2017-08-01 | 杭州劲力节能科技有限公司 | A kind of vacuum salt production circulation automatic measure on line control method for improving |
| CN103970541A (en) * | 2014-05-22 | 2014-08-06 | 杭州劲力节能科技有限公司 | Online self-learning optimizing control method of vacuum salt production circulating water system |
| CN104534617A (en) * | 2014-12-08 | 2015-04-22 | 北京华电方胜技术发展有限公司 | Cold source centralized digital control method based on energy consumption monitoring |
| CN104534617B (en) * | 2014-12-08 | 2017-04-26 | 北京方胜有成科技股份有限公司 | Cold source centralized digital control method based on energy consumption monitoring |
| CN104566815A (en) * | 2014-12-26 | 2015-04-29 | 珠海格力电器股份有限公司 | Remote control system and method for water system of central air conditioner and central air conditioner |
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Application publication date: 20120314 |