CN103335379A - Intelligent energy-saving controlling device based on central air conditioner and controlling method thereof - Google Patents
Intelligent energy-saving controlling device based on central air conditioner and controlling method thereof Download PDFInfo
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- CN103335379A CN103335379A CN2013102949986A CN201310294998A CN103335379A CN 103335379 A CN103335379 A CN 103335379A CN 2013102949986 A CN2013102949986 A CN 2013102949986A CN 201310294998 A CN201310294998 A CN 201310294998A CN 103335379 A CN103335379 A CN 103335379A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000001816 cooling Methods 0.000 claims abstract description 47
- 239000000498 cooling water Substances 0.000 claims abstract description 44
- 238000007710 freezing Methods 0.000 claims abstract description 42
- 230000008014 freezing Effects 0.000 claims abstract description 42
- 238000004378 air conditioning Methods 0.000 claims description 49
- 238000004458 analytical method Methods 0.000 claims description 21
- 238000011217 control strategy Methods 0.000 claims description 3
- 230000009897 systematic effect Effects 0.000 claims description 3
- 238000007726 management method Methods 0.000 description 22
- 238000005057 refrigeration Methods 0.000 description 10
- 238000005265 energy consumption Methods 0.000 description 9
- 238000004134 energy conservation Methods 0.000 description 7
- 238000007405 data analysis Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 101100388674 Arabidopsis thaliana EER5 gene Proteins 0.000 description 2
- 101100029585 Arabidopsis thaliana PHB3 gene Proteins 0.000 description 2
- 101100321720 Arabidopsis thaliana PP2AA1 gene Proteins 0.000 description 2
- 101150015395 TAF12B gene Proteins 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000012550 audit Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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Abstract
The invention discloses an intelligent energy-saving controlling device based on a central air conditioner and a controlling method of the intelligent energy-saving controlling device based on the central air conditioner, and relates to central air conditioners. The intelligent energy-saving controlling device based on the central air conditioner comprises an intelligent energy-efficiency management controller, a sensor, a temperature pressure flow valve, a cooling tower energy efficiency analyzing unit, a cooling water pump energy efficiency analyzing unit, a cooling host energy efficiency analyzing unit, a freezing water pump energy efficiency analyzing unit and a tail-end air conditioner energy efficiency analyzing unit. Parameters like the temperature of the central air conditioner are collected, whether a current system state meets user requirements is analyzed, and whether system energy efficiency ratio is highest is analyzed; the energy efficiency point of the cooling tower in the current state, the energy efficiency point of the cooling water pump in the current state, the energy efficiency point of the cooling host in the current state, the energy efficiency point of the cooling water pump and the energy efficiency point of the tail-end device in the current state are analyzed; the energy efficiency point of each unit is analyzed by the controller to obtain the best controlling strategy and to control devices to operate, and the fact that the system always runs in a most energy-saving state is ensured.
Description
Technical field
The present invention relates to central air-conditioning, especially relate to wisdom energy-saving control device and control method thereof based on central air-conditioning.
Technical background
Central air conditioner system is as the important component part of building system, its proportion that accounts for whole building system power consumption is very big, the energy resource consumption of building trade accounts for 30% of national total energy consumption, and central air-conditioning accounts for 70% of whole building power consumption, along with the demand of building human nature service, this numeral is also in continuous growth.The energy-conservation of central air conditioner system saved the business electrical support to reducing the building system power consumption, and optimizing State Grid's structure has extremely important meaning and effect.
Central air-conditioning is in when design, whenever can both guarantee the refrigeration requirement of interior of building in the whole year in order to guarantee central air-conditioning, often when design all is to design central air conditioner system according to 115% of the refrigeration requirement of hot weather.Because under the normal situation of weather, all without any loading with kinetic force, this just causes central air-conditioning all is to operate under the higher operating mode, will cause very big energy waste like this for main frame, water pump, cooling tower etc.Particularly under the situation that meteorological condition changes, such as raining summer, when temperature was not high, refrigeration requirement was very little, but central air-conditioning operates in again near the declared working condition, and this waste is just more obvious.
The main means of existing central air-conditioning energy are by increasing converter plant at cooling tower, cooling water pump, chilled water pump equipment, supply water and the temperature difference of backwater waits to control rotating speed of motor according to the temperature difference, the chilled water of cooling water water inlet and water outlet, thereby the realization central air conditioner system is energy-conservation.Such energy-saving control method is though the system that can guarantee has certain energy-saving efficiency.But ignored the energy-conservation of freezing main frame, caused energy-saving effect can not reach global optimum.
Wang Kaijun etc. (Wang Kaijun etc. the audit of central air conditioner system energy and Energy Saving Control research, intelligent building, 2006,09) reported that the central air conditioner system energy is audited and Energy Saving Control research; Shen Shiping etc. (Shen Shiping etc. central air-conditioning chilled water main pressure reduction and the temperature difference are controlled energy-conservation research, building heat-energy air conditioner, 2012,02) reported that central air-conditioning chilled water main pressure reduction and the temperature difference control energy-conservation research; Zhu Shirong etc. (Zhu Shirong etc. the model analysis research of central air conditioner system refrigeration duty and energy-saving design, Hefei Teachers College's journal, 2010,06) reported the model analysis research of central air conditioner system refrigeration duty and energy-saving design; Chen Liang etc. (Chen Liang etc. central air conditioner system analysis of Energy Saving Technology, scientific and technological information, 2011,35) reported the central air conditioner system analysis of Energy Saving Technology.
Summary of the invention
The objective of the invention is to the deficiency at existing central air-conditioning energy method, a kind of wisdom energy-saving control device and control method thereof based on central air-conditioning is provided.
Described wisdom energy-saving control device based on central air-conditioning is provided with wisdom efficiency Management Controller, sensor, temperature, pressure flow valve analytic unit, cooling tower efficiency analytic unit, cooling water pump efficiency analytic unit, freezing main frame efficiency analytic unit, chilled water pump efficiency analytic unit, terminal air-conditioning efficiency analytic unit; The input termination central air conditioner system of described sensor, the output of the input termination sensor of temperature, pressure flow valve analytic unit; Temperature, pressure flow valve analytic unit, cooling tower efficiency analytic unit, cooling water pump efficiency analytic unit, freezing main frame efficiency analytic unit, the input of the output termination wisdom efficiency Management Controller of chilled water pump efficiency analytic unit and terminal air-conditioning efficiency analytic unit, the cooling tower control instruction output termination cooling tower of wisdom efficiency Management Controller, the cooling water pump control instruction output termination cooling water pump of wisdom efficiency Management Controller, the freezing host computer control instruction output end of wisdom efficiency Management Controller connects freezing main frame, the chilled water pump control instruction output termination chilled water pump of wisdom efficiency Management Controller, the terminal air-conditioning of terminal air-conditioning control instruction output termination of wisdom efficiency Management Controller; The output of the input termination cooling tower of cooling tower efficiency analytic unit, the output of the input termination cooling water pump of cooling water pump efficiency analytic unit, the output of the freezing main frame of input termination of freezing main frame efficiency analytic unit, the output of the output of the input termination chilled water pump of chilled water pump efficiency analytic unit, the terminal air-conditioning of the input termination of terminal air-conditioning efficiency analytic unit.
Described sensor can be provided with temperature sensor, pressure sensor and flow sensor.
Described wisdom efficiency Management Controller can adopt single-chip microcomputer, DDC, PLC or industrial computer etc. to calculate operation hardware, and wisdom efficiency Management Controller mainly on hardware foundation, by the mode of computer programming, is realized the control function.
Described wisdom energy-saving control method based on central air-conditioning adopts described wisdom energy-saving control device based on central air-conditioning, said method comprising the steps of:
Whether 1) gather temperature, pressure, flow, each equipment running status of central air conditioner system by temperature sensor, pressure sensor, flow sensor, analyze current system mode and meet consumers' demand, whether systematic energy efficiency ratio is the highest;
2) data of returning from the cooling tower collection by the analysis of cooling tower efficiency analytic unit analyze the efficiency point of cooling tower under the current state;
3) data of returning from the cooling water pump collection by the analysis of cooling water pump efficiency analytic unit analyze the efficiency point of cooling water pump under the current state;
4) data of returning from freezing main frame collection by the analysis of freezing main frame efficiency analytic unit analyze the efficiency point of freezing main frame under the current state;
5) data of returning from the chilled water pump collection by the analysis of chilled water pump efficiency analytic unit analyze the efficiency point of chilled water pump under the current state;
6) data of returning from the end-equipment collection by the analysis of end-equipment efficiency analytic unit analyze the efficiency point of current state lower end equipment;
7) wisdom efficiency Management Controller is analyzed the efficiency point of each unit, draws optimum control strategy, controls each equipment operation, and the assurance system operates in power save mode always.
Guaranteeing that the total Energy Efficiency Ratio EER that calculates central air conditioner system is minimum under the situation of terminal temperature difference with cold demand, the system of assurance operates in power save mode.
Wisdom efficiency Management Controller, main collection analysis sensing data, end-equipment running status, chilled water pump running status, freezing main frame running status, cooling water pump running status, cooling tower running status, under the current refrigeration duty demand of computing system, the optimum Energy Efficiency Ratio of analytical system, by issuing control instruction, control end-equipment, chilled water pump, freezing main frame, cooling water pump, cooling tower operation operate on the highest point of Energy Efficiency Ratio system.
By proposing the efficiency point control of each energy consumption equipment of central air conditioner system, calculate the energy-conservation optimum point of central air conditioner system, central air conditioning equipment operations such as control cooling tower, cooling water pump, chilled water pump, freezing main frame, and the collateral security system operates in current refrigeration requirement maximum energy-saving point.
Description of drawings
Fig. 1 is the composition schematic diagram of the wisdom energy-saving control device embodiment based on central air-conditioning of the present invention.
The specific embodiment
Following examples will the present invention is further illustrated by reference to the accompanying drawings.
Referring to Fig. 1, described wisdom energy-saving control device embodiment based on central air-conditioning is provided with wisdom efficiency Management Controller 1, sensor 21, temperature, pressure flow valve analytic unit 22, cooling tower efficiency analytic unit 3, cooling water pump efficiency analytic unit 4, freezing main frame efficiency analytic unit 5, chilled water pump efficiency analytic unit 6, terminal air-conditioning efficiency analytic unit 7; The input termination central air conditioner system of described sensor 21, the output of the input termination sensor 21 of temperature, pressure flow valve analytic unit 22; Temperature, pressure flow valve analytic unit 22, cooling tower efficiency analytic unit 3, cooling water pump efficiency analytic unit 4, freezing main frame efficiency analytic unit 5, the input of the output termination wisdom efficiency Management Controller 1 of chilled water pump efficiency analytic unit 6 and terminal air-conditioning efficiency analytic unit 7, the cooling tower control instruction output termination cooling tower 30 of wisdom efficiency Management Controller 1, the cooling water pump control instruction output termination cooling water pump 40 of wisdom efficiency Management Controller 1, the freezing host computer control instruction output end of wisdom efficiency Management Controller 1 connects freezing main frame 50, the chilled water pump control instruction output termination chilled water pump 60 of wisdom efficiency Management Controller 1, the terminal air-conditioning 70 of terminal air-conditioning control instruction output termination of wisdom efficiency Management Controller 1; The output of the input termination cooling tower 30 of cooling tower efficiency analytic unit 3, the output of the input termination cooling water pump 40 of cooling water pump efficiency analytic unit 4, the output of the freezing main frame 50 of input termination of freezing main frame efficiency analytic unit 5, the output of the output of the input termination chilled water pump 60 of chilled water pump efficiency analytic unit 6, the terminal air-conditioning 70 of the input termination of terminal air-conditioning efficiency analytic unit 7.
Described sensor can be provided with temperature sensor, pressure sensor and flow sensor.
Described wisdom efficiency Management Controller 1 can adopt single-chip microcomputer, DDC, PLC or industrial computer etc. to calculate operation hardware, and wisdom efficiency Management Controller 1 mainly on hardware foundation, by the mode of computer programming, is realized the control function.
Described wisdom energy-saving control method based on central air-conditioning adopts described wisdom energy-saving control device based on central air-conditioning, said method comprising the steps of:
Whether 1) gather temperature, pressure, flow, each equipment running status of central air conditioner system by temperature sensor, pressure sensor, flow sensor, analyze current system mode and meet consumers' demand, whether systematic energy efficiency ratio is the highest;
2) data analysis of returning from the cooling tower collection by the analysis of cooling tower efficiency analytic unit outes the efficiency point of cooling tower under the current state;
3) data analysis of returning from the cooling water pump collection by the analysis of cooling water pump efficiency analytic unit outes the efficiency point of cooling water pump under the current state;
4) data analysis of returning from freezing main frame collection by the analysis of freezing main frame efficiency analytic unit outes the efficiency point of freezing main frame under the current state;
5) data analysis of returning from the chilled water pump collection by the analysis of chilled water pump efficiency analytic unit outes the efficiency point of chilled water pump under the current state;
6) data analysis of returning from the end-equipment collection by the analysis of end-equipment efficiency analytic unit outes the efficiency point of current state lower end equipment;
7) wisdom efficiency Management Controller is analyzed the efficiency point of each unit, draws optimum control strategy, controls each equipment operation, and the assurance system operates in power save mode always.
Below provide operation principle of the present invention and flow process:
End-equipment is the equipment to user's cooling, and chilled water pump and cooling water pump are be used to power is provided, and freezing main frame is by acting and heat exchange, reduces the temperature of the chilled water of returning from end-equipment, the temperature of the cooling water that used for cooling tower comes out in cooling from main frame.
Be that certain internal connection is arranged between each equipment in the central air-conditioning, the operational efficiency of cooling tower can influence the temperature that enters of freezing main frame cooling medium, cooling medium enter the refrigerating efficiency that temperature can influence freezing main frame, influence the Energy Efficiency Ratio of main frame, the cold transfer efficiency that freezes water pump and cooling water pump can influence the refrigeration of end-equipment.Whole air-conditioning system is the heat-exchange system of a complexity.
The present invention improves the electric energy of system by proposing a kind of central air-conditioning Energy Efficiency Ratio optimization control method.
Record temperature difference X1 by temperature sensor, water flow sensor records rate-of flow Y1, and electric quantity metering equipment records the equipment operate power.
The Energy Efficiency Ratio of end-equipment is EER1, and the energy consumption proportion that accounts for central air conditioner system is K1;
EER1=F1(X1,Y1,Z1)--------------------------------------------------------------------(1)
F1 represents with X1, and Y1, Z1 are the function of variable;
X1 represents to pass in and out the temperature difference of end-equipment medium;
Y1 represents to pass in and out the flow of end-equipment medium;
Z1 represents the operate power of end-equipment.
The Energy Efficiency Ratio of chilled water pump is EER2, and the energy consumption proportion that accounts for central air conditioner system is K2;
EER2=F2(X2,Y2)------------------------------------------------------------------------(2)
F2 represents that with X2 Y2 is the function of variable;
X2 represents the discharge through chilled water pump;
Y2 represents the operate power of chilled water pump.
The Energy Efficiency Ratio of freezing main frame is EER3, and the energy consumption proportion that accounts for central air conditioner system is K3;
EER3=F3(X3,Y3,Z3)--------------------------------------------------------------------(3)
F3 represents with X3, and Y3, Z3 are the function of variable;
X3 represents to pass in and out the temperature difference of freezing main frame chilled water;
Y3 represents to pass in and out the discharge of freezing main frame chilled water;
Z3 represents the operate power of freezing main frame.
The Energy Efficiency Ratio of cooling water pump is EER4, and the energy consumption proportion that accounts for central air conditioner system is K4;
EER4=F4(X4,Y4)-----------------------------------------------------------------------(4)
F4 represents that with X4 Y4 is the function of variable;
X4 represents the discharge through cooling water pump;
Y4 represents the operate power of cooling water pump.
The Energy Efficiency Ratio of cooling tower is EER5, and the energy consumption proportion that accounts for central air conditioner system is K5;
EER5=F5(X5,Y5,Z5)-------------------------------------------------------------------(5)
F5 represents with X5, and Y5, Z5 are the function of variable;
X5 represents to pass in and out the temperature difference of cooling tower chilled water;
Y5 represents to pass in and out the discharge of cooling tower chilled water;
Z5 represents the operate power of cooling tower.
Total Energy Efficiency Ratio of central air conditioner system is:
+K4×F4(X4,Y4)+K5×F5(X5,Y5,Z5)----------------------------(6)
EER represents the total energy effect of central air-conditioning;
The energy consumption of Kn indication equipment n compares proportion;
The Energy Efficiency Ratio of EERn indication equipment n;
Guaranteeing that the total Energy Efficiency Ratio EER that calculates central air conditioner system is minimum under the situation of terminal temperature difference with cold demand, the system of assurance operates in power save mode.
Wisdom efficiency Management Controller, main collection analysis sensing data, end-equipment running status, chilled water pump running status, freezing main frame running status, cooling water pump running status, cooling tower running status, under the current refrigeration duty demand of computing system, the optimum Energy Efficiency Ratio of analytical system, by issuing control instruction, control end-equipment, chilled water pump, freezing main frame, cooling water pump, cooling tower operation operate on the highest point of Energy Efficiency Ratio system.
By proposing the efficiency point control of each energy consumption equipment of central air conditioner system, calculate the energy-conservation optimum point of central air conditioner system, central air conditioning equipment operations such as control cooling tower, cooling water pump, chilled water pump, freezing main frame, and the collateral security system operates in current refrigeration requirement maximum energy-saving point.
Claims (4)
1. based on the wisdom energy-saving control device of central air-conditioning, it is characterized in that being provided with wisdom efficiency Management Controller, sensor, temperature, pressure flow valve analytic unit, cooling tower efficiency analytic unit, cooling water pump efficiency analytic unit, freezing main frame efficiency analytic unit, chilled water pump efficiency analytic unit, terminal air-conditioning efficiency analytic unit; The input termination central air conditioner system of described sensor, the output of the input termination sensor of temperature, pressure flow valve analytic unit; Temperature, pressure flow valve analytic unit, cooling tower efficiency analytic unit, cooling water pump efficiency analytic unit, freezing main frame efficiency analytic unit, the input of the output termination wisdom efficiency Management Controller of chilled water pump efficiency analytic unit and terminal air-conditioning efficiency analytic unit, the cooling tower control instruction output termination cooling tower of wisdom efficiency Management Controller, the cooling water pump control instruction output termination cooling water pump of wisdom efficiency Management Controller, the freezing host computer control instruction output end of wisdom efficiency Management Controller connects freezing main frame, the chilled water pump control instruction output termination chilled water pump of wisdom efficiency Management Controller, the terminal air-conditioning of terminal air-conditioning control instruction output termination of wisdom efficiency Management Controller; The output of the input termination cooling tower of cooling tower efficiency analytic unit, the output of the input termination cooling water pump of cooling water pump efficiency analytic unit, the output of the freezing main frame of input termination of freezing main frame efficiency analytic unit, the output of the output of the input termination chilled water pump of chilled water pump efficiency analytic unit, the terminal air-conditioning of the input termination of terminal air-conditioning efficiency analytic unit.
2. according to claim 1 based on the wisdom energy-saving control device of central air-conditioning, it is characterized in that described sensor is provided with temperature sensor, pressure sensor and flow sensor.
3. according to claim 1 based on the wisdom energy-saving control device of central air-conditioning, it is characterized in that described wisdom efficiency Management Controller adopts single-chip microcomputer, DDC, PLC or industrial computer.
4. based on the wisdom energy-saving control method of central air-conditioning, it is characterized in that adopting according to claim 1 based on the wisdom energy-saving control device of central air-conditioning, its method may further comprise the steps:
Whether 1) gather temperature, pressure, flow, each equipment running status of central air conditioner system by temperature sensor, pressure sensor, flow sensor, analyze current system mode and meet consumers' demand, whether systematic energy efficiency ratio is the highest;
2) data of returning from the cooling tower collection by the analysis of cooling tower efficiency analytic unit analyze the efficiency point of cooling tower under the current state;
3) data of returning from the cooling water pump collection by the analysis of cooling water pump efficiency analytic unit analyze the efficiency point of cooling water pump under the current state;
4) data of returning from freezing main frame collection by the analysis of freezing main frame efficiency analytic unit analyze the efficiency point of freezing main frame under the current state;
5) data of returning from the chilled water pump collection by the analysis of chilled water pump efficiency analytic unit analyze the efficiency point of chilled water pump under the current state;
6) data of returning from the end-equipment collection by the analysis of end-equipment efficiency analytic unit analyze the efficiency point of current state lower end equipment;
7) wisdom efficiency Management Controller is analyzed the efficiency point of each unit, draws optimum control strategy, controls each equipment operation, and the assurance system operates in power save mode always.
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| CN103822337A (en) * | 2014-03-07 | 2014-05-28 | 贵州汇通华城股份有限公司 | Energy-saving adjusting method and device for air conditioner end equipment |
| CN108489012A (en) * | 2018-01-30 | 2018-09-04 | 深圳市新环能科技有限公司 | Cold source of air conditioning energy efficiency model control method based on load prediction and constraint |
| CN111780384A (en) * | 2020-06-15 | 2020-10-16 | 上海海悦实业发展有限公司 | Central air-conditioning control system |
| CN112228982A (en) * | 2020-09-23 | 2021-01-15 | 北京嘉木科瑞科技有限公司 | Intelligent energy efficiency control system and intelligent energy efficiency control method for indirect evaporative cooling unit |
| CN113587414A (en) * | 2020-10-22 | 2021-11-02 | 重庆大学 | Air conditioner water system control system |
| CN114279053A (en) * | 2021-12-24 | 2022-04-05 | 湖北华工能源股份有限公司 | Central air-conditioning system based on COP band theory and control method |
| CN118408267A (en) * | 2024-07-01 | 2024-07-30 | 深圳市前海能源科技发展有限公司 | Air conditioning refrigeration system optimization method and device, computer equipment |
| CN118998912A (en) * | 2024-10-21 | 2024-11-22 | 国网（天津）综合能源服务有限公司 | Building air conditioner energy efficiency diagnosis method and system based on electricity consumption data |
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