CN105571063A - Shallow geothermal energy source management system and implementation method thereof - Google Patents
Shallow geothermal energy source management system and implementation method thereof Download PDFInfo
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- CN105571063A CN105571063A CN201511014627.3A CN201511014627A CN105571063A CN 105571063 A CN105571063 A CN 105571063A CN 201511014627 A CN201511014627 A CN 201511014627A CN 105571063 A CN105571063 A CN 105571063A
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/59—Remote control for presetting
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Abstract
The invention discloses a shallow geothermal energy source management system and an implementation method thereof. The shallow geothermal energy source management system comprises an energy source data acquisition unit, a data warehouse storage unit and a data mining and analyzing unit. Accordingly, efficient, stable and automatic operation is achieved, automatic monitoring and management of a central air conditioning system are achieved, possible damage to the air conditioning system caused by human factors is avoided or reduced, operation stability of the central air conditioning system is improved, and therefore indirect economic benefits are created. Meanwhile, gang control over a unit, a chilled water pump, a cold source water pump and other units can be completed, and then optimized operation of the system is achieved.
Description
Technical field
The present invention relates to shallow layer ground-temperature energy technical field, particularly relate to a kind of shallow layer ground-temperature energy energy management system and its implementation.
Background technology
Earth source heat pump is that one utilizes underground shallow layer geothermal energy resources (also to claim ground energy, comprise underground water, soil or surface water etc.) not only can heat supply but also the high-efficiency energy-saving air conditioning system that can freeze, earth-source hot-pump system, by inputting a small amount of high-grade energy (as electric energy), realizes low temperature heat energy and shifts to high temperature heat.Ground can be distinguished in the winter time as the thermal source of earth-source hot-pump system heating and the low-temperature receiver of summer air-conditioning, in the winter time, by pipeline circulation, the heat in ground energy " is got " out, after improving temperature, and supply indoor heating; In summer, the heat of indoor " is got " out, be discharged in ground energy and go.Because earth-source hot-pump system has not by Effect of Underground Water Level, efficient, environmental protection, pollution-free etc. advantage, obtained at home in recent years and developed rapidly.
Earth source heat pump station system is variable flow system, adopt variable-frequency control technique, change pump rotary speed and realize discharge regulate water system.The energy-conserving product of station is also divided into several generations, and first generation product, based on pump energy saving, adopts water pump of central air conditioner energy-saving and frequency-variable control technology, and single pressure reduction or the temperature difference control, and can realize the energy-conservation amplitude of pumping system 20%-30%.This accounts at the energy-conservation of whole central air conditioner system the 3-6% that 5-10%(generally accounts for the of that month electricity charge usually).Second generation product by advanced software processing, modularity control in conjunction with converter technique, the Acquire and process of multi-point signal, the basis of traditional frequency conversion technology achieves Based Intelligent Control, control system dynamic is made to follow the change tread of actual load, freezing, cooling (source) water water yield needed for adjustment.Can reach main engine energy-saving 10-30%, the energy-conservation 20-30% of water system like this, machine energy-saving can be made to reach about 20-30%.
Along with the high speed development of information technology and computer networking technology, more and more higher to the requirement of the optimal combination of the structure of intelligent building, system, service and management, provide reasonable, efficient, energy-conservation, a comfortable working environment imperative.
In view of this, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of shallow layer ground-temperature energy energy management system and its implementation, be intended to solve existing machine room energy source station control system often just to meet the normal operation of equipment for target, for the situation also just overview of the data of system cloud gray model, energy consumption, to the problem that status of energy consumption is but ignored.
Technical scheme of the present invention is as follows:
A kind of shallow layer ground-temperature energy energy management system, wherein, comprising:
The data collected for gathering host computer system, water pump system, side, water source, air-conditioning side and environmental data, and are sent to following data warehouse storage unit by multi-energy data collecting unit;
Data warehouse storage unit, sets up real-time data base for the data collected according to multi-energy data collecting unit, and realizes the record of energy consumption data, comprehensive inquiry and graphic statistics, and energy efficiency of equipment value in line computation;
Data mining analysis unit, for passing through historical data, realize multiple analytic angle, the energy consumption of multiple graphics mode and efficiency comparative analysis, and can highs and lows in automatic decision curve, display limit produces the detailed controling parameters of equipment and the service data in moment.
Described shallow layer ground-temperature energy energy management system, wherein, described data mining analysis unit is also for when performing the graphic analyses of Various types of data, can discriminatory analysis angle and analysis condition, automatically Matching and modification is carried out to 2 dimension coordinate key elements of chart, and automatically parse the third dimension and originate according to the key element of data.
Described shallow layer ground-temperature energy energy management system, wherein, described data mining analysis unit also for the associating of physical factor according to energy consumption, efficiency data and meteorological condition every day, according to the conditional filtering preset, match best efficiency record in specified scope and the same day control strategy.
Described shallow layer ground-temperature energy energy management system, wherein, also comprises: Energy Saving Control unit, and for the group control technology based on source pump, monitoring source pump air-conditioning side water collector and the water outlet of water knockout drum and return water temperature and flow, calculate the load of air-conditioning side; Judge that the current source pump met needed for system loading opens quantity by analysis temperature change with the trend of time variations again, thus carry out the Automatic adjusument of cold source system.
Described shallow layer ground-temperature energy energy management system, wherein, described Energy Saving Control unit comprises further:
Load unit allocation subelement, for judging whether next source pump starts according to the condition preset, specifically, when to meet following three conditions simultaneously, next heat pump machine just starts:
Condition one: chilled water leaving water temperature > chilled water temperature setting+fluctuation range;
Condition two: the running current >95% of the source pump run;
Condition three: the retention time > loading delay time of simultaneously satisfy condition one and condition two.
Described shallow layer ground-temperature energy energy management system, wherein, described Energy Saving Control unit comprises further:
Off-load unit allocation subelement, for determining whether to carry out off-load to source pump according to the condition that presets, specifically, when to meet following two conditions simultaneously, just carries out off-load to source pump:
Condition four: the chilled water inlet/outlet temperature difference < off-load temperature difference;
Condition five: condition four meet situation retention time > off-load delay time.
An implementation method for described shallow layer ground-temperature energy energy management system, wherein, comprises the following steps:
S1, multi-energy data collecting unit gather host computer system, water pump system, side, water source, air-conditioning side and environmental data, and the data collected are sent to following data warehouse storage unit;
The data that S2, data warehouse storage unit collect according to multi-energy data collecting unit set up real-time data base, and realize the record of energy consumption data, comprehensive inquiry and graphic statistics, and energy efficiency of equipment value in line computation;
S3, data mining analysis unit pass through historical data, realize multiple analytic angle, the energy consumption of multiple graphics mode and efficiency comparative analysis, and can highs and lows in automatic decision curve, display limit produces the detailed controling parameters of equipment and the service data in moment.
The implementation method of described shallow layer ground-temperature energy energy management system, wherein, described step S3 also comprises: according to the associating of physical factor of energy consumption, efficiency data and meteorological condition every day, according to the conditional filtering preset, match best efficiency record in specified scope and the same day control strategy; And according to the associating of physical factor of energy consumption, efficiency data and meteorological condition every day, according to the conditional filtering preset, match best efficiency record in specified scope and the same day control strategy.
The implementation method of described shallow layer ground-temperature energy energy management system, wherein, also comprise step S4, Energy Saving Control unit based on the group control technology of source pump, the water outlet of monitoring source pump air-conditioning side water collector and water knockout drum and return water temperature and flow, calculate the load of air-conditioning side; Judge that the current source pump met needed for system loading opens quantity by analysis temperature change with the trend of time variations again, thus carry out the Automatic adjusument of cold source system.
Beneficial effect: shallow layer ground-temperature energy energy management system of the present invention and its implementation have the following advantages:
(1) take numeral as the intelligent technocracy that becomes more meticulous of foundation
After adopting energy management system (EMS), manager can realize accurate to the administration of energy conservation of system, the Energy Saving Control of quantification, than relying on experience merely, the Energy Saving Control qualitatively that labor management is carried out has higher accuracy, thus achieves and farthest obtain the energy saving space.
By operation or the simple operations of administrative staff, the automatic operating of efficient stable can be realized, and central air conditioner system is realized to monitoring and the management of automation, avoid or reduce the injury to air-conditioning system that may cause due to human factor, improve the stability that central air conditioner system is run, thus create indirectly economic benefit; And can complete unit, chilled water pump, the coordinated signals of the unit such as low-temperature receiver water pump, thus furthermore achieved that the optimizing operation of system.
(2) followability of air-conditioning system load is realized
EMS energy management system breaches the method for operation of conventional central air conditioner coolant system, by to the dynamic monitoring of central air conditioner energy source operational system and closed-loop control, the constant flow of air-conditioner host is run and changes variable-flow operation into, realize air-conditioner host cold medium flux follow end workload demand and synchronously change, under any loading condiction of air-conditioning system, both can guarantee the comfortableness of central air conditioner system, realize again maximum energy-conservation.
(3) ensure that unit remains high thermal conversion efficiency
A basic thought of EMS energy management system is exactly the operation going to control central air conditioner system according to the optimal operating parameter required by central air conditioner main machine, according to the operating condition of system and the change of refrigeration working medium parameter, by fuzzy controller dynamic conditioning air-conditioning system operational factor, guarantee that source pump is on the best operating point of optimization all the time, main frame is remained there is high thermal conversion efficiency, efficiently solve the conventional central air-conditioning system difficult problem that thermal conversion efficiency declines under low load condition, improve the energy utilization rate of system.
(4) conditioner overall performance optimization and coordinated operation is realized
Central air conditioner system is a more complicated system engineering, realize the optimum operation of central air conditioner system and energy-conservation, go to deal with problems from local (controlling as adopted universal frequency converter PID) be impossible accomplish, must consider for the links of air-conditioning system (comprising main frame, chilled water system, cooling water system etc.) is unified, comprehensive control, make whole system coordinated operation, best synthesis energy saving could be realized.
(5) intelligent decision of data management is realized
Aid in computer management system, utilize database store process data, to data analysis, form best operating scheme, with data commander start, instead of by rule of thumb, clap head.
The operating condition of every platform unit is all different, the data acquisition of system, store, analyze the grasp helped unit maximum energy-saving operating mode, adding up the power consumption data of energy consumption equipment, automatic formation curve, history curve, simulation curve, in real time form, history report, is that Energy Conservation is for data basis.。
Accompanying drawing explanation
Fig. 1 is the structured flowchart of shallow layer ground-temperature energy energy management system of the present invention.
Fig. 2 is the flow chart of the implementation method of shallow layer ground-temperature energy energy management system of the present invention.
Fig. 3 is the schematic diagram of chilled water system flow-control in the embodiment of shallow layer ground-temperature energy energy management system of the present invention.
Fig. 4 is the schematic diagram of cooling water system flow-control in the embodiment of shallow layer ground-temperature energy energy management system of the present invention.
Detailed description of the invention
The invention provides a kind of shallow layer ground-temperature energy energy management system and its implementation, for making object of the present invention, technical scheme and effect clearly, clearly, the present invention is described in more detail below.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, the invention provides a kind of shallow layer ground-temperature energy energy management system, it comprises: multi-energy data collecting unit 100, data warehouse storage unit 200 and data mining analysis unit 300.Wherein, the data collected for gathering host computer system, water pump system, side, water source, air-conditioning side and environmental data, and are sent to following data warehouse storage unit by multi-energy data collecting unit 100.Data warehouse storage unit 200 sets up real-time data base for the data collected according to multi-energy data collecting unit, and realizes the record of energy consumption data, comprehensive inquiry and graphic statistics, and energy efficiency of equipment value in line computation.Data mining analysis unit 300 is for passing through historical data, realize multiple analytic angle, the energy consumption of multiple graphics mode and efficiency comparative analysis, and can highs and lows in automatic decision curve, display limit produces the detailed controling parameters of equipment and the service data in moment.
Further, in described shallow layer ground-temperature energy energy management system, described data mining analysis unit is also for when performing the graphic analyses of Various types of data, can discriminatory analysis angle and analysis condition, automatically Matching and modification is carried out to 2 dimension coordinate key elements of chart, and automatically parse the third dimension and originate according to the key element of data.
Further, in described shallow layer ground-temperature energy energy management system, described data mining analysis unit also for the associating of physical factor according to energy consumption, efficiency data and meteorological condition every day, according to the conditional filtering preset, match best efficiency record in specified scope and the same day control strategy.
Specifically, shallow layer ground-temperature energy energy management system realizes playing a role to the scientific management of the aspect such as economical operation, load Analysis, peak load shifting, rational management of energy resource system, thus ensures reasonable, the economization running of energy resource system.Described energy management system mainly completes status monitoring to main energy consumption equipment, energy consumption data acquisition and storage, energy consumption data and adds up and the function such as analysis.Be divided into following several pieces:
(1) same day, operation curve module was used for particular system, particular device, particular data point, realized the graphic software platform of segmentation in the specific date or whole service datas; The numerical value of limit (highs and lows) and the time of limit generation in automatic decision, display graphics simultaneously.The figure of display can comprise: curve map, block diagram, smoothed curve figure.Meanwhile, can in current chart, the data point curve of superposition miscellaneous equipment, realizes comparing multiple equipment-related data point concentrated, tracing analysis and Trend judgement.
(2) status of energy consumption monitoring modular system is automatically according to the equipment energy consumption factor of institute's acquisition and recording, calculates the energy consumption of equipment (or system), and simultaneously to record the mode display device energy consumption data of list and curve.Meanwhile, the system energy consumption automatically calculated in set period one day adds up quantity and its unit average magnitude, and the time that in automatic decision, display graphics, the numerical value of limit (highs and lows) and limit produce.On the basis showing pole time and numerical value, all running state data of this equipment (or system) producing this limit moment can be checked, and key control parameter; Thus intuitively reflect the control action and setting parameter that produce this limit.
(3) all kinds of querying conditions of energy consumption tabulate statistics module set by operator (beginning and ending time condition, appointing system/appointed condition etc.), automatically perform query function and the tabulate statistics function of energy consumption, and automatically calculate accumulative energy consumption numerical value and average energy consumption numerical value.The result of tabulate statistics can be shown by the mode of form, also can intuitively show its result with multiple graphical chart.Utilize the automatic process of computer, we can carry out energy consumption analysis by curvilinear figure intuitively.The energy consumption time period that operating personnel only need setting to gather and energy consumption analysis object, just can obtain required analyzed pattern.Meanwhile, the system energy consumption automatically calculated under specified requirements adds up quantity and its unit average magnitude, and the time that in automatic decision, display graphics, the numerical value of limit (highs and lows) and limit produce.By this analysis module, perform energy consumption data and compare with the same period in former years, in conjunction with the environmental factor of different times, the reason of discrepancies that energy consumption uses can be analyzed, whether rationally analyze variances movement, preliminary scientific evaluation is made to managing power consumption.
(4) power consumption Structural Analysis Module is used for the communication by the intelligent electric meter device with each Node configuration of system, the power consumption condition of each key node of real-time acquisition system, and data (comprising: three-phase voltage, three-phase current, active power, reactive power, accumulation power consumption etc.) are stored in database, the composition analysis for power consumption structure provides data basis.By power consumption structural analysis, accurately can grasp the power consumption condition of the total system of cold and hot source station, subsystem, main unit equipment, water pump, analyze the main composition of power consumption, thus provide the data of science to the formulation of energy-saving scheme and analyze foundation.
Further, carrying out on the basis of data processing to the energy consumption of building, EMA assembly also will perform the computation and analysis of energy efficiency indexes, judgement; Making user by managing and the analyzing and processing of the science of carrying out, suitable Energy Saving Strategy can be used, reaching the object reducing energy consumption, raise the efficiency, control cost.It can also comprise with lower module:
(5) same day, meteorological condition module was used in system, recording relevant environmental data, as the weather, wind-force, wind direction, temperature, humidity etc. on the same day; Can inquire about simultaneously, revise history meteorological data.These meteorological condition data, using as energy consumption and the additional data of efficiency on the same day, carry out the environment reference of more science in the efficiency graphic analyses and control strategy preferred process in later stage.
(6) efficiency condition monitoring module is used for system automatically according to the equipment energy consumption factor of institute's acquisition and recording, calculate the energy valid value (COP) of equipment (or system), and support the efficiency Value Data simultaneously showing current device (or system) in the mode of monitoring record list and monitoring curve chart.Meanwhile, system calculates the efficiency mean value in set period one day automatically, and the time that in automatic decision, display graphics, the numerical value of efficiency limit (highs and lows) and limit produce.On the basis showing pole time and numerical value, all running state data of the equipment (or system) producing this limit moment can be checked, and key control parameter; Thus intuitively reflect the control action and setting parameter that produce this efficiency limit.
(7) efficiency graphic analyses module is for utilizing the automatic processing capacity of computer, and we can carry out the multi-angle comparative analysis of efficiency by curvilinear figure intuitively.Operating personnel only need by setting the conditions such as the energy consumption time period (beginning and ending time condition) that will gather and energy consumption analysis object (appointing system/appointed condition), system automatically performs the query function of equipment (or system) efficiency, the analyzed pattern required for display.Meanwhile, automatically calculate the average energy valid value under specified requirements, and the time that in automatic decision, display graphics, the numerical value of efficiency limit (highs and lows) and limit produce.
By this analysis module, according to the situation of different times, the change of different object analysis efficiency, variances movement can be analyzed whether reasonable, preliminary scientific evaluation made to managing power consumption.
(8) cross plot analysis module is according to analytic target and evaluating objects, to the historical data foundation logical relation each other of integral subsystem each in platform; As long as meet the needs of analysis, the logical relation of all data can be striding equipment, cross-system or even cross-platform.Except the attainable frequently-used data retrieval of integrated management system and operation curve, classification, combing have the analysis diagram that actual analysis is worth and manages meaning; Data mining is carried out for a large amount of operation history data setting up logical relation; By multi-angle, multi-form analysis diagram, the result of display data mining directly perceived.By the application that cross plot is analyzed, the data mining to historical data and analysis can be realized, the internal logic of each subsystem, each equipment under enabling manager intuitively understand platform, analyze service data to a deeper level, carry out Trend judgement more scientificly, more reasonably adjust and manage building running usefulness.
(9) control strategy preferred module is on the basis analyzed energy consumption and the efficiency situation of equipment/system, can according to the weather element in incidental information, coupling, preferably best efficiency Production conditions, thus realize preferred to the control strategy of system and equipment.User only needs to set the pending preferred date, and setting can the side-play amount (such as: allow when daily temperature has the ± skew of 2 DEG C) of tolerance level in the meteorological data of scheduled date, system by automatic computing, filter out best efficiency (COP) record meeting scheduled date meteorological condition.
By checking these corresponding datas recorded, just can view and producing best efficiency (COP) value moment, the service data of relevant device (or system) and controling parameters; Thus optimize the controling parameters tallying with the actual situation most and need with user, current control strategy is reasonably adjusted and optimizes.
Further, in described shallow layer ground-temperature energy energy management system, also comprise: Energy Saving Control unit, for the group control technology based on source pump, monitoring source pump air-conditioning side water collector and the water outlet of water knockout drum and return water temperature and flow, calculate the load of air-conditioning side; Judge that the current source pump met needed for system loading opens quantity by analysis temperature change with the trend of time variations again, thus carry out the Automatic adjusument of cold source system.
Specifically, for the heat pump set system that energy consumption in air-conditioning system is maximum, its energy-efficient key issue becoming air conditioner system energy saving.The very effective technological means realizing the stable operation of source pump efficient energy-saving adopts source pump team control exactly.Source pump team control is the monitoring utilizing the relevant device (source pump, water pump, valve etc.) of automatic control technology to refrigeration plant inside to carry out automation, makes the equipment in refrigeration plant reach the running status of peak efficiency.Find according to a large amount of case histories, current source pump automation strategy also exists a general problem, that is exactly the support that the technical staff of most of automatic control manufacturer does not have air-conditioning knowwhy, only refrigeration unit is used as one " large water pump " and simply monitors (starting and stopping control, state-detection, fault detect) in control flow.But in fact refrigeration unit, as a complicated electromechanical equipment, judges that its starting and stopping need to carry out according to many air-conditioning knowwhies.Such as: refrigeration unit needs the accurate detection carrying out electrical system, coolant system, lubricating system mechanical system before being initiated, need to judge according to the air conditioner load of building and the concrete condition of corollary equipment (water pump, valve etc.) simultaneously.
The team control of unit is actual is software control, the feature run equipment, is all the factors determining level of control relative superiority or inferiority to the application of the grasp of Heating, Ventilation and Air Conditioning (HVAC) Technology, control logic, engineering experience etc. for many years, can not limit by the scheme of word.Control system monitoring source pump air-conditioning side water collector and the water outlet of water knockout drum and return water temperature and flow, calculate the load of air-conditioning side.With the trend of time variations, control system judges that the current source pump met needed for system loading opens quantity by analysis temperature change, thus carry out the Automatic adjusument of cold source system.According to the size of system loading, accurately control the operation quantity of source pump and the operating condition of every platform unit, thus realize energy-conservation and reduce the object of operating cost.
Below with regard to explanation that the main contents of control strategy are in addition simple:
(1) group control technology of Intrusion Detection based on host efficiency characteristic
The efficiency (COP) of air-conditioner host is usually relevant with load, and changes with the change of load, under a certain rate of load condensate ratio of rated load (actual load with), have optimum efficiency.
From the main frame operation characteristic of each producer, various serial air-conditioner host efficiency part throttle characteristics basic simlarity, difference is very little, when picture centrifuge rate of load condensate is between 40%-90%, often produce the power consumption of 1Kw cold than little during rated load, and rate of load condensate is when 10%-40%, the power consumption often producing 1Kw cold is all large than rated load.Rate of load condensate is about 60%, and the COP of air-conditioning is the highest.
Therefore, when multiple host parallel running, should according to the efficiency characteristic of the actual conditions of air conditioner load and Ge Tai main frame, select best main frame to run number of units combination, guarantee meeting under current loads, running efficiency of system is the highest, and energy consumption is minimum.
(2) main monitoring content
| Main monitored object | Monitoring content |
| Earth source heat pump unit | Hand auto state, running status, malfunction, leaving water temperature, flow, compressor operating time, on off control etc. (by communication interface monitoring source pump operation conditions) |
| Power frequency water circulating pump | Hand auto state, running status, fault alarm, on off control |
| Frequency conversion water circulating pump | Hand auto state, running status, fault alarm, on off control, running frequency, setpoint frequency etc. (by inverter communication interface monitoring water pump operation situation) |
| Temperature sensor | Air-conditioning side, source supply and return water temperature |
| Pressure sensor | Air-conditioning side, source for pressure of return water |
| Flow sensor | Air-conditioning side, source, domestic hot-water, landscape water flow |
| Plate type heat exchanger | Primary side and secondary side temperature, pressure detecting |
| Electric switching valve | Hand auto state, on off state, fault alarm, switch control rule |
| Electric control valve | Hand auto state, fault alarm, aperture state, aperture control |
| Domestic hot-water's tank | Monitoring domestic hot-water temperature, regulates domestic hot-water's circulating pump automatically |
| Buried pipe well | Monitoring underground pipe temperature field, place of execution source thermal equilibrium analysis |
(3) major control content
According to supply and return water temperature and flow rate calculation actual end load, in conjunction with source pump installed capacity, control source pump start and stop and run number of units.
The source pump that the preferential startup optimization time is few, balance source pump running time.
According to supply and return water temperature, pressure, regulate frequency converter running frequency, keep end system stablizing for pressure of return water.
According to supply and return water temperature and the flow rate calculation landscape water system cycle of operation and time.
Build soil heat balance supervision and analysis system, solve soil heat balance problem, ensure that the long-term safety of system is stable, long-term sustainable is run.
There is provided the on-line uninterruption power supply (UPS) of corresponding power and preparation time to make stand-by power supply to control system, when main power source interrupts, at least can maintain the operation of 60 minutes.
(4) main practical function
Machine room energy-saving control system
A) the centralized Control platform of earth source heat pump machine room provides: equipment operational monitoring, operating instruction input, automatically run the functions such as control, SIM system information management, alarming and managing and data management.
B) configuration platform of KingView software selected by Energy Saving Control platform, has good man-machine interface, possesses the effective guarantee that feasible system long-term stability is run.
Machine room energy efficiency management system
A) ensure the data analysis that earth source heat pump machine room long-acting energy-saving runs and fortune pipe Policy Platform, should be able to provide:
B) equipment operating data storage, Operational Data Analysis function;
C) the real-time calculating of machine room total power input, gross output, system synthesis efficiency and display; And possess the Energy Efficiency Analysis function of intelligence;
D) there is optimization and the intelligent selection function of control strategy;
E) to realize to the comprehensive energy efficiency of earth source heat pump automatic, calculate in real time, and according to the different comprehensive energy efficiencies that different control modes produces, choose reasonable high energy efficiency control mode, guidance system high energy efficiency is run.
F) possess the storage of Temperature Field temperature layer Monitoring Data, query function, and perform the thermal balance data analysis function of different time section soil source;
G) possess the automatic processing capabilities to alert event, alarm signal by the display that appears at central workstation within 5 seconds or other warning device, and has speech prompting function;
System should possess to be provided complementary judgement to scene fortune pipe, key position monitoring and maintenance, points out the function of means.
(5) control system " soft start " mode
When source pump start, because system chilled water temperature is far longer than design temperature, source pump can mistake judge the needs having a huge refrigeration duty in air-conditioning system, thus cause the operating mode that multiple stage source pump will be loaded on rapidly 100%.Because actual refrigeration duty is less than the refrigerating capacity of multiple stage unit after source pump starts, chilled water temperature will decline rapidly, cause source pump judge the rapid reduction of refrigeration duty and shut down.Start/stop frequently like this and significantly working conditions change will reduce the service life of source pump.In order to avoid the generation of this phenomenon, control system should possess " soft start " mode, namely when system starts, slowing down the speed of unit loading/off-load by limiting source pump running current, making the running current curve of unit more " smoothly ", predict according to compound simultaneously, anticipation disconnects board number, and the system that gives is freezed the time of (heat) in advance, thus avoid number of units frequently to switch, extend unit service life.
In addition, described Energy Saving Control unit comprises further:
Load unit allocation subelement, for judging whether next source pump starts according to the condition preset, specifically, when to meet following three conditions simultaneously, next heat pump machine just starts:
Condition one: chilled water leaving water temperature > chilled water temperature setting+fluctuation range;
Condition two: the running current >95% of the source pump run;
Condition three: the retention time > loading delay time of simultaneously satisfy condition one and condition two.
Described Energy Saving Control unit can also comprise further:
Off-load unit allocation subelement, for determining whether to carry out off-load to source pump according to the condition that presets, specifically, when to meet following two conditions simultaneously, just carries out off-load to source pump:
Condition four: the chilled water inlet/outlet temperature difference < off-load temperature difference;
Condition five: condition four meet situation retention time > off-load delay time.
Wherein, the off-load temperature difference=(DDT × (CCE-CTS)/TCC)-STD; DDT is chilled water designed temperature difference, and CTS is off-load cold, and CCE is for running general refrigeration ability, and STD is for loading temperature fluctuation range, and TCC is design general refrigeration ability.
In sum, the team control of unit is never the control carrying out single factors according to supply backwater temperature difference and flow, must according to the COP of the operational factor of unit, unit (efficiency situation), no matter be air-conditioning side or load side are all vari-able flow control, difficulty is added to control, so, must be the control of multi-parameter.
In order to protect cold source equipment, in the service life of extension device, therefore needing the running time of accumulative every platform equipment, making same category of device carry out alternate run, and automatically switch when breaking down.When having a certain device fails in chilled water system, system sends terminal of reporting to the police immediately, locks this equipment in case again start simultaneously.Automatically start another available stand-by equipment or one group of available equipment at this simultaneously.When after fault failture evacuation, when equipment needs to rejoin automatic control ranks, must, at the corresponding keyed end of terminal hand-reset, the equipment of locking so just can be made again to enter automatic control ranks, to prevent, equipment is unidentified jerks.
The change of chilled water, cooling water flow can not be ignored the impact of source pump security.Water is as heat transfer and the medium of heat exchange, and suitable discharge is the necessary guarantee of source pump reliably working.Nearly ten years, along with the continuous progress of source pump and control technology thereof, the output of the refrigerating capacity of unit not only can be regulated on a large scale, and allow the freezing water yield changing operation in a big way, ensure the stable of leaving water temperature, and to the efficiency of unit and energy consumption little, make when load variations, the low-temperature receiver effluent amount of source pump is followed the change of load side flow and is changing in order to may.
(1) the changes in flow rate scope of source pump and flow change rate
The performance indications that source pump is relevant to flow have two: one to be the changes in flow rate scope allowed, and two is the flow change rates allowed.The changes in flow rate scope that unit allows is larger, is more conducive to the adjustment of chilled-water flow; The flow change rate that unit allows is larger, then during source pump variable-flow, leaving water temperature fluctuation is less.The chilled water flow weight range 45%-120% of screw machine, advanced source pump, maximum stream flow per minute is allowed to change rate of change 10%-30%, for maximum stream flow rate of change to be per minute be 30% source pump, its flow from zero increase to 100% or be reduced to zero from 100% time, approximately need 2min, for maximum stream flow rate of change to be per minute be 10% source pump, its flow from zero increase to 100% or be reduced to zero from 100% time, approximately need 6min, and general source pump maximum stream flow rate of change is per minute is 2%, then needs 30min.
(2) protection of evaporimeter low discharge
Suitable chilled water flow value, can avoid evaporimeter surge occurs because discharge is too low or freezes.
The scope allowed due to source pump can not from 0-100%, therefore, when minimum permissible flow lower than source pump of the flow of load side, the pressure difference transmitter will installed by flowmeter that water system main is installed or evaporimeter two ends, record the flow differential pressure of water system, utilize bypass regulator valve, make bypass flow be equal to or greater than the minimum discharge of source pump permission.
On the other hand, in the Flow-rate adjustment process of chilled water, should also be noted that the rate of change that flow per minute reduces should not be greater than 5%.If it is excessive that chilled-water flow reduces rate of change, discharge is too small, and refrigerant flow has little time corresponding minimizing, probably causes freezing temperature sharply to decline, and its temperature lower than 0 DEG C, may make the bursting by freezing of evaporimeter copper pipe.
Visible, although along with the development of source pump and automatic control technology, breach the design concept of source pump constant flow, but the scope of chilled-water flow change is not unconfined, it has individual lower limit equally, on the other hand, discharge rate of change also has a definite limitation, and the governing speed of chilled-water flow should be not too fast.Only in this way could stablize, safe operation.
(3) evaporimeter water outlet low-temperature protection
In source pump running, if the freezing water yield reduces suddenly, evaporator water may be caused to fluctuate or reduce, if source pump fails to unload in time, in evaporimeter, chilled water temperature may be down to freezing point, causes heat exchange pipe of evaporator to freeze and damages.
First, control system will prevent chilled-water flow lower than safe traffic, secondly, increases water temperature detection.When detecting that water temperature is lower than design temperature, increases chilled-water flow automatically.
When source pump is shut down from running status; according to evaporation structure, the chilled water minimum flow velocity limit and anti-freezing structure desired temperature; design anti-freezing time delay stoppage protection program; chilled water pump deferred run a period of time is shut down again; namely after chilled water leaving water temperature is higher than anti-freeze desired temperature; the operation of chilled water pump could be stopped, allowing chilled water take away remaining cold in evaporimeter, prevent the freezing heat exchanger tube of remaining cold.
(4) protection of condenser low discharge
Be per minute for condenser maximum stream flow rate of change be 30%, suitable cooling water flow can ensure that source pump refrigeration system is in good state, ensures the operating efficiency of unit.When discharge is too low, not only condensing pressure can raise, and refrigerating capacity declines, and time serious, may cause the fault of compressor.
The control of cooling water pump is it should be noted that when cooling water flow is reported to the police, control system improves discharge automatically, or opens a water pump again.The minimum discharge allowed according to source pump is adjusted the minimum speed of cooling water pump, to ensure that, when variable-flow operation, cooling water flow is not less than the safe traffic required by source pump.
(5) leaving condenser water temperature protection
The too high or too low operation source pump of cooling water temperature is all disadvantageous, thus, when Variable Cooling Water Flow amount is run, must increase cooling water temperature limit value defencive function.To avoid source pump generation surge or cisco unity malfunction.Source pump is run in engineering, if cooling water flow is sharply decreased to below safe traffic, leaving condenser water temperature may be caused to raise; cause condenser pressure too high, refrigerating efficiency declines, and surge phenomenon occurs; leaving condenser water pipe adds water temperature detection, carries out necessary protection.When the temperature of leaving water temperature higher than setting being detected, automatic augmented flow, makes leaving condenser water temperature reduce.
When source pump is shut down from running status, cooling water pump answers time delay a period of time to shut down again, allows cooling water take away heat remaining in condenser, damages condenser to prevent waste heat.
In addition, in order to balance the running time of each source pump, extending unit service life, needing the running process regularly changing unit.Unit has three kinds of sequence types respectively: basic unit; Peak value unit; Regulate unit.
Basic unit is first and starts last shutdown in running process; Peak value unit is that last starts first shutdown in running process; Regulate unit in running process between basic unit and peak value unit, for the blank between compensated peak unit and basic unit refrigerating capacity.
By the application of above-mentioned source pump team control and load prediction strategy, the reliable object of source pump efficient energy-saving safe can be realized.Cold automation strategy is no is energy-conservation, finally also needs the COP value investigating source pump.Designing unit comes source pump type selecting according to the conventional load section of building locality.Building for 80% oepration at full load period as certain of certain area is most situation, and so the type selecting of cold should make the COP value when 80% oepration at full load maximum.Like this, 3 cold operating in 80% load may just be there are out than opening the more energy-conservation situation of 2 cold operating in 100% load.This will cause also needs to load cold when meeting building refrigeration requirement.The strategy of whole cold team control will become more complicated.
Moreover the control principle of native system comprises:
(1) chilled water system flow-control
When weather conditions or air conditioning terminal load change, air conditioning water system supply and return water temperature, flow, pressure also changes thereupon, flow, these data detected are delivered to controller by differential pressure pickup and temperature sensor, the history data of the experimental data that controller foundation gathers and system, according to prediction algorithm model, host characteristics and cycle period, dope the air conditioner load of future time instance, and the operational factor of refrigerating capacity needed for this load and system, comprise chilled-water flow, supply and return water temperature, the temperature difference, pressure reduction, the parameter values such as host C OP, and the output frequency of each chilled water pump frequency converter is regulated with this, control the rotating speed of water pump, change the flow that its flow makes chilled water system, supply and return water temperature, the temperature difference, pressure reduction operates in the optimal value that system provides, system output energy and end workload demand are matched.As shown in Figure 3, because system have employed load prediction and the Dynamic controlling exporting energy, and regulate chilled-water flow in advance by prediction load, both the control hysteresis problem of large dead time, large Inert systems had been solved, improve the stability of system cloud gray model, make again air-conditioning system under various load condition, the comfortableness of terminal temperature difference can be ensured, save the energy ezpenditure of system to greatest extent.
(2) flow-control of cooling water system
When weather conditions or air conditioning terminal load change, thereupon, engine efficiency also changes air-conditioner host rate of load condensate thereupon.
Because engine efficiency is relevant with cooling water temperature, within the specific limits, cooling water temperature reduces, and is conducive to the efficiency, the reduction main frame energy consumption that improve main frame.In this project, the temperature of cooling water and the heat exchange efficiency of soil, landscape water heat exchange efficiency are relevant, relevant to discharge.The exchange capability of heat etc. of the exchange capability of heat of the energy consumption of the energy consumption of main frame, water pump, soil, landscape water must be considered, find the efficiency peak of system, the thermal balance of the reverse heat transfer overall process of air-conditioning refrigeration system is completed with minimum system energy consumption, thus obtain best system effectiveness, as shown in Figure 4.
In short, the variable-flow second generation product of the advanced person of employing, i.e. Systematical control.System by advanced software processing, modularity control in conjunction with converter technique, the Acquire and process of multi-point signal, the basis of traditional converter technique achieves Based Intelligent Control, this control system dynamic is made to follow the change tread of actual load (mainly source pump), freezing, cooling (source) water water yield needed for adjustment, instead of single pump variable frequency controls.
Present invention also offers a kind of implementation method of described shallow layer ground-temperature energy energy management system, as shown in Figure 2, comprise the following steps:
S1, multi-energy data collecting unit gather host computer system, water pump system, side, water source, air-conditioning side and environmental data, and the data collected are sent to following data warehouse storage unit;
The data that S2, data warehouse storage unit collect according to multi-energy data collecting unit set up real-time data base, and realize the record of energy consumption data, comprehensive inquiry and graphic statistics, and energy efficiency of equipment value in line computation;
S3, data mining analysis unit pass through historical data, realize multiple analytic angle, the energy consumption of multiple graphics mode and efficiency comparative analysis, and can highs and lows in automatic decision curve, display limit produces the detailed controling parameters of equipment and the service data in moment.
Further, in the implementation method of described shallow layer ground-temperature energy energy management system, described step S3 also comprises: according to the associating of physical factor of energy consumption, efficiency data and meteorological condition every day, according to the conditional filtering preset, match best efficiency record in specified scope and the same day control strategy; And according to the associating of physical factor of energy consumption, efficiency data and meteorological condition every day, according to the conditional filtering preset, match best efficiency record in specified scope and the same day control strategy.
Further, in the implementation method of described shallow layer ground-temperature energy energy management system, also comprise step S4, Energy Saving Control unit based on the group control technology of source pump, the water outlet of monitoring source pump air-conditioning side water collector and water knockout drum and return water temperature and flow, calculate the load of air-conditioning side; Judge that the current source pump met needed for system loading opens quantity by analysis temperature change with the trend of time variations again, thus carry out the Automatic adjusument of cold source system.
In sum, shallow layer ground-temperature energy energy management system of the present invention and its implementation, wherein, shallow layer ground-temperature energy energy management system comprises: multi-energy data collecting unit, data warehouse storage unit and data mining analysis unit.Thus realize the automatic operating of efficient stable, and central air conditioner system is realized to monitoring and the management of automation, avoid or reduce the injury to air-conditioning system that may cause due to human factor, improve the stability that central air conditioner system is run, thus create indirectly economic benefit; And can complete unit, chilled water pump, the coordinated signals of the unit such as low-temperature receiver water pump, thus furthermore achieved that the optimizing operation of system.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (9)
1. a shallow layer ground-temperature energy energy management system, is characterized in that, comprising:
The data collected for gathering host computer system, water pump system, side, water source, air-conditioning side and environmental data, and are sent to following data warehouse storage unit by multi-energy data collecting unit;
Data warehouse storage unit, sets up real-time data base for the data collected according to multi-energy data collecting unit, and realizes the record of energy consumption data, comprehensive inquiry and graphic statistics, and energy efficiency of equipment value in line computation;
Data mining analysis unit, for passing through historical data, realize multiple analytic angle, the energy consumption of multiple graphics mode and efficiency comparative analysis, and can highs and lows in automatic decision curve, display limit produces the detailed controling parameters of equipment and the service data in moment.
2. shallow layer ground-temperature energy energy management system according to claim 1, it is characterized in that, described data mining analysis unit is also for when performing the graphic analyses of Various types of data, can discriminatory analysis angle and analysis condition, automatically Matching and modification is carried out to 2 dimension coordinate key elements of chart, and automatically parse the third dimension and originate according to the key element of data.
3. shallow layer ground-temperature energy energy management system according to claim 2, it is characterized in that, described data mining analysis unit also for the associating of physical factor according to energy consumption, efficiency data and meteorological condition every day, according to the conditional filtering preset, match best efficiency record in specified scope and the same day control strategy.
4. shallow layer ground-temperature energy energy management system according to claim 1, it is characterized in that, also comprise: Energy Saving Control unit, for the group control technology based on source pump, monitoring source pump air-conditioning side water collector and the water outlet of water knockout drum and return water temperature and flow, calculate the load of air-conditioning side; Judge that the current source pump met needed for system loading opens quantity by analysis temperature change with the trend of time variations again, thus carry out the Automatic adjusument of cold source system.
5. shallow layer ground-temperature energy energy management system according to claim 4, is characterized in that, described Energy Saving Control unit comprises further:
Load unit allocation subelement, for judging whether next source pump starts according to the condition preset, specifically, when to meet following three conditions simultaneously, next heat pump machine just starts:
Condition one: chilled water leaving water temperature > chilled water temperature setting+fluctuation range;
Condition two: the running current >95% of the source pump run;
Condition three: the retention time > loading delay time of simultaneously satisfy condition one and condition two.
6. shallow layer ground-temperature energy energy management system according to claim 5, is characterized in that, described Energy Saving Control unit comprises further:
Off-load unit allocation subelement, for determining whether to carry out off-load to source pump according to the condition that presets, specifically, when to meet following two conditions simultaneously, just carries out off-load to source pump:
Condition four: the chilled water inlet/outlet temperature difference < off-load temperature difference;
Condition five: condition four meet situation retention time > off-load delay time.
7. an implementation method for shallow layer ground-temperature energy energy management system according to claim 1, is characterized in that, comprise the following steps:
S1, multi-energy data collecting unit gather host computer system, water pump system, side, water source, air-conditioning side and environmental data, and the data collected are sent to following data warehouse storage unit;
The data that S2, data warehouse storage unit collect according to multi-energy data collecting unit set up real-time data base, and realize the record of energy consumption data, comprehensive inquiry and graphic statistics, and energy efficiency of equipment value in line computation;
S3, data mining analysis unit pass through historical data, realize multiple analytic angle, the energy consumption of multiple graphics mode and efficiency comparative analysis, and can highs and lows in automatic decision curve, display limit produces the detailed controling parameters of equipment and the service data in moment.
8. the implementation method of shallow layer ground-temperature energy energy management system according to claim 7, it is characterized in that, described step S3 also comprises: according to the associating of physical factor of energy consumption, efficiency data and meteorological condition every day, according to the conditional filtering preset, match best efficiency record in specified scope and the same day control strategy; And according to the associating of physical factor of energy consumption, efficiency data and meteorological condition every day, according to the conditional filtering preset, match best efficiency record in specified scope and the same day control strategy.
9. the implementation method of shallow layer ground-temperature energy energy management system according to claim 7, it is characterized in that, also comprise step S4, Energy Saving Control unit based on the group control technology of source pump, monitoring source pump air-conditioning side water collector and the water outlet of water knockout drum and return water temperature and flow, calculate the load of air-conditioning side; Judge that the current source pump met needed for system loading opens quantity by analysis temperature change with the trend of time variations again, thus carry out the Automatic adjusument of cold source system.
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