CN104534617A - Cold source centralized digital control method based on energy consumption monitoring - Google Patents

Cold source centralized digital control method based on energy consumption monitoring Download PDF

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Publication number
CN104534617A
CN104534617A CN201410743804.0A CN201410743804A CN104534617A CN 104534617 A CN104534617 A CN 104534617A CN 201410743804 A CN201410743804 A CN 201410743804A CN 104534617 A CN104534617 A CN 104534617A
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China
Prior art keywords
energy consumption
temperature
cold source
water pump
monitoring
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CN201410743804.0A
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CN104534617B (en
Inventor
王春杰
王强
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Beijing won the Polytron Technologies Inc.
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BEIJING FORALL SOFT TECHNOLOGY DEVELOPMENT Co Ltd
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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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • 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
    • 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
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • 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
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • F24F2110/22—Humidity of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/40—Pressure, e.g. wind pressure

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a cold source centralized digital control method based on energy consumption monitoring. The cold source centralized digital control method based on energy consumption monitoring comprises the following steps that a, real-time monitoring is conducted on power utilization, water utilization, the cooling quantity, the temperature, the pressure and the equipment state of a cold source system of a central air conditioner; b, energy consumption data and system state data collected in the step a are summarized, real-time refrigerating efficiency of the cold source system is calculated according to operating power parameters of a water chilling unit, a chilled water pump, a cooling water pump and a cooling tower fan in the system and the refrigerating capacity of the water chilling unit, forecast energy consumption data at present are obtained through forecasting according to outdoor temperature and humidity parameters at present, indoor temperature and humidity parameters at present and a load forecast model, the forecast energy consumption data and the energy consumption data which are actually monitored are compared, problems existing in the use process of a refrigerating system are found, and an optimized operation control strategy of the cold source system is formed; c, the optimized operation control strategy formed in the step b is conducted, and optimized operation control is achieved through a direct digital controller and an electrically operated valve connected with the direct digital controller.

Description

A kind of low-temperature receiver based on energy consumption monitoring concentrates digital control method
Technical field
The present invention relates to energy-conserving and environment-protective field, concentrate digital control method in particular to a kind of low-temperature receiver based on energy consumption monitoring.
Background technology
Central air-conditioning is the unit that in heavy construction, power consumption is maximum, in total electric cost expenditure, only central air-conditioning has just accounted for about 60%, what central air conditioner system power consumption was maximum is main frame, main frame accounts for more than 60% in the middle of whole air-conditioning system, the circulatory system accounts for about 40% of whole system power consumption, and therefore how central air-conditioning economizes on electricity, how to improve operational efficiency and just seem and be even more important.
Traditional central air-conditioning energy mainly adopts the frequency conversion of water pump system to add intelligence control system to realize, main frame in central air conditioner system, water pump, entering of cooling tower, delivery port set temperature, pressure sensor, sensor output signal access centralized monitoring computer, adopt PLC programmable controller, PLC controls refrigeration host computer by the communication interface of refrigeration host computer Main Control Tank, PLC is by wire connection control cooling water pump, the duty of chilled water pump and cooling blower, PLC and centralized monitoring computer realize both-way communication by bus, it is characterized in that: comprehensive adjustment central air-conditioning freezing water, the flow of cooling water, the operating load ratio of temperature and refrigeration host computer compressor, reach the optimum state of central air-conditioning economical operation.
But, because not carrying out effective supervision and analysis to central air conditioning energy consumption, cause the situations such as reducing energy consumption does not have specific aim, energy-saving effect not good.
Summary of the invention
The invention provides a kind of low-temperature receiver based on energy consumption monitoring and concentrate digital control method, in order to improve the cooling and energy conserving effect of central air conditioner cold source system.
For achieving the above object, the invention provides a kind of low-temperature receiver based on energy consumption monitoring and concentrating digital control method, comprising the following steps:
A, to the electricity consumption of central air conditioner cold source system, carry out Real-Time Monitoring by water, cold, temperature, pressure, equipment state, specifically comprise: by be arranged on low-temperature receiver switchgear house electric power acquisition terminal monitoring, gather cold, water pump, the power consumption parameter of cooling tower and power consumption; By being arranged on the running water acquisition terminal monitoring of refrigeration plant water pipe, gathering the water consumption of cold source system; By being arranged on temperature on chilled water, cooling water system pipeline, pressure sensing terminal monitoring, gathering the temperature and pressure parameter of cold source system; Monitored by the temperature and humidity sensing terminal of disposed in the outdoor and indoor desired location, gather outdoor and indoor humiture parameter; And monitoring chilled water pump frequency manually, auto state, chilled water pump start-stop is long-range, state on the spot, chilled water pump running status, fault alarm;
B, by the energy consumption data gathered in step a, system state data gathers, according to intrasystem handpiece Water Chilling Units, chilled water pump, cooling water pump, the operate power parameter of blower fan of cooling tower, the refrigerating capacity of handpiece Water Chilling Units, calculate the real-time refrigerating efficiency of cold source system, and obtain current prediction of energy consumption data according to current outdoor temperature humidity parameter and indoor temperature and humidity parameter and load forecasting model prediction, the energy consumption data of prediction of energy consumption data and actual monitoring is contrasted, find the problem in refrigeration system use, form the optimizing operation control strategy of cold source system, wherein, described load forecasting model obtains in the following way: add up under different outdoor temperature humidity parameter and indoor temperature degree Parameter Conditions, time per, every day, monthly, the energy consumption data of annual cold source system, the same period or chain rate analysis are carried out to the energy consumption of cold source system, obtain building actual load and the related law between each meteorological element in outdoor and end part throttle characteristics, and according to this related law, historical data Load Forecast Algorithm is revised, obtain load forecasting model,
C, by the optimizing operation control strategy formed in step b, realizes optimizing operation by direct digital controller and coupled motor-driven valve and controls.
Further, described direct digital controller is separately positioned on main frame, cooling water pump, cooling tower position.
Further, said method is further comprising the steps of:
The energy consumption data gathered in step a, system state data are carried out gathering formation form and analysis report, carrying out contrast statistics with historical data draws energy-saving effect simultaneously, pushes, is presented to related personnel.
Further, described chilled water pump running status comprises the converting operation of chilled water pump, bypass runs, stop.
Further, prescribe a time limit when return water temperature reaches in setting value, handpiece Water Chilling Units starts automatically, under return water temperature reaches setting value in limited time, handpiece Water Chilling Units autostop, carries out chain with peripheral equipment simultaneously, first opens motor-driven valve, opens cooling water pump again, opens cooling tower again, finally opens handpiece Water Chilling Units when system starts, first stop handpiece Water Chilling Units during shutdown, stop cooling tower again, then stop cooling water pump, finally close motor-driven valve; When there being multiple stage handpiece Water Chilling Units to run, system selects according to return water temperature number of units of starting shooting automatically, automatically switches, and wherein, cold source system is when selecting the handpiece Water Chilling Units of opening, and the handpiece Water Chilling Units of automatic choice for use time less is run.
Further, said method also comprises:
Low temperature, low voltage difference, low discharge protection are provided with to chilled water system; And/or
High temperature, low discharge protection are provided with to cooling water system; And/or
Open-phase protection, overvoltage protection, overcurrent protection, low-voltage protection, output short circuit protection, earth-fault protection are carried out to power supply; And/or
When device fails, realize frequency conversion, bypass loop automatic switching function by switch board, and automatically drop into stand-by equipment; And/or
Fault alarm, bitcom fault, technological parameter early warning and alarming function are arranged to cooling water system equipment, warning priority is set based on warning menace level simultaneously, automatic monitoring is various types of does not report to the police, classification corresponding to fault comprises general alarm, pre-alarm, important warning etc., and on picture, show corresponding alarm point, automatic spring warning relevant information.
The present invention is based on energy consumption supervisory systems, central air conditioner system energy waste and energy use efficiency low time period is distinguished by energy consumption monitoring, by efficiency diagnostic analysis Producing reason, carry out energy-conservation rectification targetedly by the application of concentrated digital control technology, make amount of energy saving measurable, visual simultaneously.Make energy consumption monitoring by our work, concentrate digital control technology and energy efficiency management perfect adaptation.The present invention carries out energy efficiency supervision and improvement from aspects such as air-conditioning energy consumption running optimizatin, daily management optimizations, makes the application of technology have more science and preciseness.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is that the low-temperature receiver based on energy consumption monitoring of one embodiment of the invention concentrates digital control method flow chart.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not paying the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is that the low-temperature receiver based on energy consumption monitoring of one embodiment of the invention concentrates digital control method flow chart.As shown in the figure, this low-temperature receiver concentrates digital control method to comprise the following steps:
A, to the electricity consumption of central air conditioner cold source system, carry out Real-Time Monitoring by water, cold, temperature, pressure, equipment state, specifically comprise: by be arranged on low-temperature receiver switchgear house electric power acquisition terminal monitoring, gather cold, water pump, the power consumption parameter of cooling tower and power consumption; By being arranged on the running water acquisition terminal monitoring of refrigeration plant water pipe, gathering the water consumption of cold source system; By being arranged on temperature on chilled water, cooling water system pipeline, pressure sensing terminal monitoring, gathering the temperature and pressure parameter of cold source system; Monitored by the temperature and humidity sensing terminal of disposed in the outdoor and indoor desired location, gather outdoor and indoor humiture parameter; And monitoring chilled water pump frequency manually, auto state, chilled water pump start-stop is long-range, state on the spot, chilled water pump running status, fault alarm;
B, by the energy consumption data gathered in step a, system state data gathers, according to intrasystem handpiece Water Chilling Units, chilled water pump, cooling water pump, the operate power parameter of blower fan of cooling tower, the refrigerating capacity of handpiece Water Chilling Units, calculate the real-time refrigerating efficiency of cold source system, and obtain current prediction of energy consumption data according to current outdoor temperature humidity parameter and indoor temperature and humidity parameter and load forecasting model prediction, the energy consumption data of prediction of energy consumption data and actual monitoring is contrasted, find the problem in refrigeration system use, form the optimizing operation control strategy of cold source system, wherein, described load forecasting model obtains in the following way: add up under different outdoor temperature humidity parameter and indoor temperature degree Parameter Conditions, time per, every day, monthly, the energy consumption data of annual cold source system, the same period or chain rate analysis are carried out to the energy consumption of cold source system, obtain building actual load and the related law between each meteorological element in outdoor and end part throttle characteristics, and according to this related law, historical data Load Forecast Algorithm is revised, obtain load forecasting model,
C, by the optimizing operation control strategy formed in step b, realizes optimizing operation by direct digital controller and coupled motor-driven valve and controls.
In above-described embodiment, described direct digital controller can have multiple, is separately positioned on main frame, cooling water pump, cooling tower position.
Check for ease of administrative staff and technical staff, above-described embodiment can also comprise the following steps:
The energy consumption data gathered in step a, system state data are carried out gathering formation form and analysis report, carrying out contrast statistics with historical data draws energy-saving effect simultaneously, pushes, is presented to related personnel.
When specific implementation, according to managerial demand, can carry out the multiple angles such as history, ratio to can situation analysis, also can carry out multidimensional analysis according to time, region etc., ways of presentation can the multiple ways of presentation such as trade-off curve, block diagram, pie chart.Per diem, the moon, season, year equal time section carry out energy consumption statistic, generate various energy resources report forms and analysis report.
Further, described chilled water pump running status can comprise the converting operation of chilled water pump, bypass runs, stop.
Be below the embodiment of the present invention's specific implementation:
The central air conditioner cold source systemic-function realized mainly comprises Real-Time Monitoring, service application and management and supports three aspects.Real-Time Monitoring is electricity consumption to central air conditioner cold source system, carries out Real-Time Monitoring by water, cold, temperature, pressure, equipment state; Service application aspect analyzes the information gathered, and produces the optimizing operation control strategy of central air conditioner cold source system, realizes optimizing operation control by direct digital controller, motor-driven valve etc.; Data are mainly formed form and analysis report by management support aspect, and add up energy-saving effect, the needs according to management customize, and issue simultaneously, be presented to administrative staff and technical staff simultaneously.
1, capital construction
Comprising basic network hardware, the operating systems such as server, network, main frame, is the basis that energy consumption supervisory systems is built.
2, energy consumption on-line monitoring
Electric power acquisition terminal is disposed, the power consumption parameter of monitoring, collection cold, water pump, cooling tower and power consumption at low-temperature receiver switchgear house; Running water acquisition terminal is disposed, the water consumption of monitoring, collection cold source system at refrigeration plant water pipe; In chilled water, cooling water system line upper portion administration temperature, pressure sensing terminal, the temperature and pressure of monitoring, acquisition system; Temperature and humidity sensing terminal is disposed, monitoring, collection outdoor and indoor humiture in outdoor and indoor exemplary position.
3, energy consumption analysis
Macro or mass analysis is carried out to energy consumption data, system state data, finds out the questions and prospect that during cold source system runs, energy consumption is wasted, efficiency is low, form optimizing operation control strategy.
4, optimizing operation controls
Dispose direct data control terminal at main frame, water pump, each device location of cooling tower, carry out communication with main frame, water pump, cooling tower, control strategy is write direct digital controller, by software, centralized Control and displaying are carried out to cold source system.
Wherein the control of cold source system optimizing operation adopts concentrated digital control; low-temperature receiver concentrates numerical control system to be to the cold water main unit at cold station and the Centralizing inspection of whole the next subsidiary engine (comprising chilled water pump, cooling water pump, cooling tower, motor-driven valve etc.) thereof and control; a key start of cold source system, order start and stop, loading, off-load, interlock, protection can be realized; according to the outdoor weather situation configuration switch machine time, according to indoor load change setting confession, return water temperature etc.
Direct data control (Direct Digital Control, DDC), is commonly referred to DDC controller.DDC system utilizes micro-signal processor to do to perform various logic controlling functions, and maximum feature is exactly from the collection of parameter, is transferred to the links such as control and all adopts digital control function to realize.DDC controller is the core of whole system, is the critical component that system realizes controlling functions.
5, Internet Transmission
The construction content of system transfers network mainly the laying of communication line, one is be connected with data acquisition unit downlink port by RS485 line by the measuring terminal of water, electricity, temperature, pressure, direct data control terminal to be closed with each Controling network by RS485 line and is connected; Two is by netting twine connection data collector, the collection front end processor controlling gateway and system.
The systemic-function realized comprises:
1, energy consumption on-line monitoring
To the electricity consumption of central air conditioner cold source system, carry out Real-Time Monitoring by water, cold, temperature, pressure, equipment state.
2, energy consumption analysis
According to managerial demand, carry out the multiple angles such as history, ratio to can situation analysis, also can carry out multidimensional analysis according to time, region etc., ways of presentation can the multiple ways of presentation such as trade-off curve, block diagram, pie chart.Per diem, the moon, season, year equal time section carry out energy consumption statistic, generate various energy resources report forms and analysis report.
3, cold water main unit operational management and inside and outside data monitoring
Handpiece Water Chilling Units monitoring running state, fault alarm; Handpiece Water Chilling Units inner parameter is monitored; Handpiece Water Chilling Units opens, stop control; Accumulation handpiece Water Chilling Units running time.
4, chilled water system monitoring
Chilled water circuit house steward water supply flow is monitored; Chilled water is for return main's temperature monitoring; Pressure reduction between water collecting and diversifying device, the monitoring of confession backwater pressure reduction; Chilled water pump frequency is manual, auto state; Chilled water pump start-stop is long-range, state on the spot; Chilled water pump running status (converting operation, bypass run, stop), fault alarm; Chilled water pump frequency converter frequency feedback, given; Chilled water pump frequency converter inner parameter is monitored; Chilled water pump power param eter supervision.
5, cooling water system monitoring
Cooling water return main temperature monitoring; Pressure reduction between water collecting and diversifying device, the monitoring of confession backwater pressure reduction; Cooling water pump frequency is manual, auto state; Cooling water pump, cooling tower start-stop be long-range, state on the spot; Cooling water pump, blower fan of cooling tower monitoring running state, fault alarm; Cooling water pump, cooling tower on the spot, long-range on off control; Cooling water pump frequency converter frequency feedback, given; Cooling water pump frequency converter inner parameter is monitored; Cooling water pump, cooling tower power param eter supervision.
6, machine room team control
Equipment automatically switches, the chain control of system; Handpiece Water Chilling Units loads, Unloading Control; To the monitoring of the equipment such as motor-driven valve; System protection controls.Prescribe a time limit when return water temperature reaches in setting value, handpiece Water Chilling Units starts automatically, under return water temperature reaches setting value in limited time, handpiece Water Chilling Units autostop, carry out chain with peripheral equipment simultaneously, first open motor-driven valve, open cooling water pump again, open cooling tower again, finally open handpiece Water Chilling Units when system starts, first stop handpiece Water Chilling Units during shutdown, stop cooling tower again, then stop cooling water pump, finally close motor-driven valve; When there being multiple stage handpiece Water Chilling Units to run, system selects according to return water temperature number of units of starting shooting automatically, automatically switch, wherein, cold source system is when selecting the handpiece Water Chilling Units of opening, the handpiece Water Chilling Units of automatic choice for use time less is run, and as automatically selected second, the 3rd handpiece Water Chilling Units to add operation during return water temperature height, automatically reduces operation number of units time as low in return water temperature.
7, safeguard protection and warning
Chiller plant control system provides full-order system defencive function, comprises chilled water system and is provided with low temperature, low voltage difference, low discharge protection; Cooling water is provided with high temperature, low discharge protection.Guarantee main frame security of operation, stablize, avoid the faults such as main frame generation surge, evaporimeter frozen pipe.Power phase shortage protection, overvoltage protection, overcurrent protection, low-voltage protection, output short circuit protection, earth-fault protection.During device fails, switch board realizes frequency conversion, bypass loop automatic switching function, and automatically drops into stand-by equipment.Chilled water system device failure alert, bitcom fault, technological parameter early warning and alarming.Multiple alarming and managing function is provided, provides the warning based on warning menace level preferentially to arrange.Automatic monitoring is various types of does not report to the police, and comprises general alarm, pre-alarm, important warning etc., and on picture, shows corresponding alarm point, automatic spring warning relevant information.
In addition, also can longer-term storage and carry out various inquiry according to the demand of user, as inquired about by conditioned disjunction conditional combinations such as user, fault type, time of origins.Alarm logging in historical data base can long term archival make post analysis.
The present invention is based on energy consumption supervisory systems, central air conditioner system energy waste and energy use efficiency low time period is distinguished by energy consumption monitoring, by efficiency diagnostic analysis Producing reason, carry out energy-conservation rectification targetedly by the application of concentrated digital control technology, make amount of energy saving measurable, visual simultaneously.Make energy consumption monitoring by our work, concentrate digital control technology and energy efficiency management perfect adaptation.The present invention carries out energy efficiency supervision and improvement from aspects such as air-conditioning energy consumption running optimizatin, daily management optimizations, makes the application of technology have more science and preciseness.
One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of an embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
One of ordinary skill in the art will appreciate that: the module in the device in embodiment can describe according to embodiment and be distributed in the device of embodiment, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in previous embodiment, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of embodiment of the present invention technical scheme.

Claims (6)

1. the low-temperature receiver based on energy consumption monitoring concentrates a digital control method, it is characterized in that, comprises the following steps:
A, to the electricity consumption of central air conditioner cold source system, carry out Real-Time Monitoring by water, cold, temperature, pressure, equipment state, specifically comprise: by be arranged on low-temperature receiver switchgear house electric power acquisition terminal monitoring, gather cold, water pump, the power consumption parameter of cooling tower and power consumption; By being arranged on the running water acquisition terminal monitoring of refrigeration plant water pipe, gathering the water consumption of cold source system; By being arranged on temperature on chilled water, cooling water system pipeline, pressure sensing terminal monitoring, gathering the temperature and pressure parameter of cold source system; Monitored by the temperature and humidity sensing terminal of disposed in the outdoor and indoor desired location, gather outdoor and indoor humiture parameter; And monitoring chilled water pump frequency manually, auto state, chilled water pump start-stop is long-range, state on the spot, chilled water pump running status, fault alarm;
B, by the energy consumption data gathered in step a, system state data gathers, according to intrasystem handpiece Water Chilling Units, chilled water pump, cooling water pump, the operate power parameter of blower fan of cooling tower, the refrigerating capacity of handpiece Water Chilling Units, calculate the real-time refrigerating efficiency of cold source system, and obtain current prediction of energy consumption data according to current outdoor temperature humidity parameter and indoor temperature and humidity parameter and load forecasting model prediction, the energy consumption data of prediction of energy consumption data and actual monitoring is contrasted, find the problem in refrigeration system use, form the optimizing operation control strategy of cold source system, wherein, described load forecasting model obtains in the following way: add up under different outdoor temperature humidity parameter and indoor temperature degree Parameter Conditions, time per, every day, monthly, the energy consumption data of annual cold source system, the same period or chain rate analysis are carried out to the energy consumption of cold source system, obtain building actual load and the related law between each meteorological element in outdoor and end part throttle characteristics, and according to this related law, historical data Load Forecast Algorithm is revised, obtain load forecasting model,
C, by the optimizing operation control strategy formed in step b, realizes optimizing operation by direct digital controller and coupled motor-driven valve and controls.
2. low-temperature receiver according to claim 1 concentrates digital control method, it is characterized in that, described direct digital controller is separately positioned on main frame, cooling water pump, cooling tower position.
3. low-temperature receiver according to claim 1 concentrates digital control method, it is characterized in that, further comprising the steps of:
The energy consumption data gathered in step a, system state data are carried out gathering formation form and analysis report, carrying out contrast statistics with historical data draws energy-saving effect simultaneously, pushes, is presented to related personnel.
4. low-temperature receiver according to claim 1 concentrates digital control method, it is characterized in that, described chilled water pump running status comprises the converting operation of chilled water pump, bypass runs, stop.
5. low-temperature receiver according to claim 1 concentrates digital control method, it is characterized in that, prescribe a time limit when return water temperature reaches in setting value, handpiece Water Chilling Units starts automatically, under return water temperature reaches setting value in limited time, handpiece Water Chilling Units autostop, carry out chain with peripheral equipment simultaneously, first open motor-driven valve when system starts, open cooling water pump again, open cooling tower again, finally open handpiece Water Chilling Units, first stop handpiece Water Chilling Units during shutdown, stop cooling tower again, then stop cooling water pump, finally close motor-driven valve; When there being multiple stage handpiece Water Chilling Units to run, system selects according to return water temperature number of units of starting shooting automatically, automatically switches, and wherein, cold source system is when selecting the handpiece Water Chilling Units of opening, and the handpiece Water Chilling Units of automatic choice for use time less is run.
6. low-temperature receiver according to claim 1 concentrates digital control method, it is characterized in that, also comprises:
Low temperature, low voltage difference, low discharge protection are provided with to chilled water system; And/or
High temperature, low discharge protection are provided with to cooling water system; And/or
Open-phase protection, overvoltage protection, overcurrent protection, low-voltage protection, output short circuit protection, earth-fault protection are carried out to power supply; And/or
When device fails, realize frequency conversion, bypass loop automatic switching function by switch board, and automatically drop into stand-by equipment; And/or
Fault alarm, bitcom fault, technological parameter early warning and alarming function are arranged to cooling water system equipment, warning priority is set based on warning menace level simultaneously, automatic monitoring is various types of does not report to the police, classification corresponding to fault comprises general alarm, pre-alarm, important warning etc., and on picture, show corresponding alarm point, automatic spring warning relevant information.
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