CN203869259U - Variable pressure difference control device based on openness of chilled water valve of tail-end air conditioning equipment - Google Patents
Variable pressure difference control device based on openness of chilled water valve of tail-end air conditioning equipment Download PDFInfo
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- CN203869259U CN203869259U CN201420285296.1U CN201420285296U CN203869259U CN 203869259 U CN203869259 U CN 203869259U CN 201420285296 U CN201420285296 U CN 201420285296U CN 203869259 U CN203869259 U CN 203869259U
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Abstract
The utility model discloses a variable pressure difference control device based on the openness of a chilled water valve of tail-end air conditioning equipment. The variable pressure difference control device comprises an industrial computer, an intelligent controller, a frequency converter, a sensor and a chilled water pump. The intelligent controller is connected with an outdoor temperature sensor, an indoor temperature sensor and a temperature sensor arranged on the tail-end equipment and is further connected with a pressure difference sensor arranged on the tail-end equipment to collect data. A temperature sensor, a pressure sensor and a flow sensor are arranged at a supply water and return water opening of the chilled water pump and are connected with the intelligent controller to feed back supply water and return water temperature, pressure and flow of the chilled water pump to the intelligent controller. The sensors can send work condition parameter data to the industrial computer through a TCP/IP protocol. The frequency converter is arranged on the chilled water pump, and operation of the chilled water pump can be controlled by the frequency converter according to instructions sent by the intelligent controller. The variable pressure difference control device has the advantages of being compact in structure and good in energy conservation effect.
Description
Technical field
The utility model relates to central air-conditioning energy control field, relates in particular to a kind of poor control device of transformation based on end air-conditioning equipment chilled water valve opening.
Background technology
In current large commercial, civil high-rise buildings, the energy consumption of central air conditioner system accounts for greatly the 60% even higher of whole building energy consumption.So, also have higher requirement for efficient operation and the energy-saving design standard of air-conditioning system.
The energy consumption of central air-conditioning mainly comes from induction system operation, and the induction system of air-conditioner water system comprises chilled water pump, cooling water pump, chilled water system pipe network and cooling water system pipe network.And both conveying energy consumptions of handpiece Water Chilling Units and water pump account for 70% left and right of whole air conditioning energy consumption.As everyone knows, central air conditioner system designs according to operating mode at full capacity, and in fact the air-conditioning unit overwhelming majority time is operation (the load operation time exceedes 70% below 50% conventionally) under sub-load, refrigeration machine has perfect energy regulating system, can automatically regulate the power of refrigeration machine to reach energy-conservation object according to load variations, and refrigerant water pump generally only carries out simple number of units control, can not change continuously and regulate continuously according to the required lift of system and flow, unnecessary lift consumes on the control valve of equipment endways.Although the refrigeratory capacity of low-temperature receiver is supplied with as required while therefore operation under partial load condition, the transmitting power energy consumption of water pump does not have corresponding minimizing; Load calculates bigger than normal, and resistance calculated value can be relatively conservative, causes that water pump apolegamy flow is large, lift is higher, occurs the little temperature difference of large flow, the situation that the stability of a system is poor, adaptability to changes is poor and operation energy consumption is higher in central air conditioning water system.
The form of the water system of central air-conditioning adopts primary pump variable flow system more at present.Traditional speed regulating method is at delivery side of pump place mounted valve, by closing minor valve, strengthens system local resistance, and flow is reduced.At present, adopting frequency converter to regulate the rotating speed of ac motor is a kind of conservation measures extensively adopting in production, life, also has certain application in central air conditioning water system.In central air conditioning water system, the control method of pump variable frequency speed governing has temperature difference control method and differential pressure control method.Temperature difference control method is constant by controlling the temperature difference, and flow is changed with load variations, and Relationship Between Dynamic Change meets side
(1), c-specific heat of water in formula,
;
the density of-water,
;
-end equipment supply backwater temperature difference, DEG C.Wherein
be traditionally arranged to be 5 DEG C, in the time that load declines, flow reduces thereupon, the chilled-water flow that reduces the each end-equipment of flow by differential temperature controller, frequency converter reduction pump rotary speed reduces in proportion, for requiring the substantially constant room of chilled water quantity delivered, can cause cold deficiency, thereby affect result of use.Thereby temperature control system is applicable to, and system is less, the simple situation of room functions.And differential pressure control method, on the return pipe of device, motor-driven valve is set endways, when the temperature difference changes, the temperature controller of end equipment makes flow be proportional to diminishing of air conditioner load by the keying degree of adjusting motor-driven valve, the resistance of ducting is increased, pump capacity reduces, and lift increases, now, the variation for return pipe pressure reduction that changes in flow rate causes, this signal is input to frequency-variable controller, compares with setting value, thereby control pump rotary speed.
Pump rotary speed is changed to control by the pressure reduction of system distal-most end conventionally, and pressure reduction changes with return pipe flow closely related.And in fact pipe characteristic is the relevant complicated function of many variables relation of how many ratios about the coefficient of dynamic viscosity of system pipeline characteristic coefficient, different temperatures fluid and the characteristic curve of end motor-driven valve and valve switch quantity.The actual service requirement that can not meet system of constant difference or constant voltage and constant-pressure drop.
At present, also existing relevant report of the poor control power-saving technology of transformation.There is research taking TRNSYS as emulation platform, set up the simulation model of central air-conditioning secondary pump variable flow system, control signal using the pressure reduction at air conditioning water system least favorable terminal temperature difference two ends as secondary pump VFC, the poor control program of air conditioning water system transformation and energy-saving effect thereof are launched to research, find compared with conventional constant pressure difference control scheme, the poor control program of transformation can be saved 6.49% secondary pump conveying energy consumption, save 5.10% handpiece Water Chilling Units operation energy consumption, there is obvious energy-saving effect.But the poor control power-saving technology of this transformation system complex, parameter is various, with high costs, and application is restricted.
Utility model content
For above problem, the utility model provides a kind of poor control device of transformation based on end air-conditioning equipment chilled water valve opening, comprises intelligent controller, frequency converter, sensor, industrial computer and chilled water pump;
Intelligent controller be arranged on outdoor outdoor temperature sensor, be arranged on indoor indoor temperature transmitter and the temperature sensor that is arranged on end-equipment is connected, and receive indoor and outdoor temperature and air-conditioning design temperature by the temperature sensor feedback on described outdoor temperature sensor, described indoor temperature transmitter and described end-equipment;
Intelligent controller is connected with the differential pressure pickup being arranged on end-equipment, and receives the data that directly and indirectly gather;
Chilled water pump be provided with temperature sensor, pressure sensor and flow sensor for backwater port, described temperature sensor, pressure sensor and flow sensor are connected with described industrial computer and feed back supply and return water temperature, pressure and the flow of described chilled water pump to described intelligent controller;
Industrial computer is connected with intelligent controller.
Sensor sends duty parameter data to described industrial computer.
Frequency converter is connected with described chilled water pump.
The utlity model has following beneficial effect: can find out valve opening maximum according to the dynamic aperture of tail end of central air conditioner valve
supply return main's pressure reduction with place chilled water system circulation line
between dynamic relationship realize the poor energy-conservation control action of tail end of central air conditioner chilled water system transformation, can improve the deficiency of the poor and constant temperature of current freezing water system of central air conditioner level pressure and constant difference technology; The utlity model has automatic control function, expert's advanced management experience, management mode can be combined with intelligent control technology, therefore feasible system intelligent operation, efficient management, energy-efficient; There is energy-saving control function, by operational analysis, select optimum control program, adjust in time the operating condition of each equipment, guarantee that the operational factor optimums such as flow, temperature and the pressure reduction of system and equipment operating efficiency are the highest, thereby make system energy efficiency the highest; Have system monitoring function, system parameter setting function, can facilitate and revise according to the actual requirements or adjust; There is data statistic analysis function, system to electricity power monitor, record, statistics and analysis, and provide the data such as energy consumption curve, main frame efficiency curve, operation note and failure logging, so that whole system ruuning situation is done multianalysis and to be reviewed; Also possess fault alarm function, the each technological parameter of the system that is provided with and equipment alarm management, type of alarm is sound, light warning and software picture disply alarm etc.
In sum, the utility model provides a kind of device that can be used for reducing chilled water system operation energy consumption and provide the burden requirement of meeting consumers' demand, can strengthen the control for energy consumption system, reduce unnecessary energy resource consumption, there is important Social benefit and economic benefit for improving efficiency of energy utilization.In addition, the utlity model has compact conformation, the advantage that operational efficiency is high.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the related tail end of central air conditioner chilled water of the utility model circulatory system control structure schematic diagram;
Fig. 2 is the poor control device composition of the related transformation based on end air-conditioning equipment chilled water valve opening of the utility model schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Based on the poor control device of transformation of end air-conditioning equipment chilled water valve opening, comprise industrial computer, intelligent controller, frequency converter, sensor and chilled water pump;
Intelligent controller be arranged on outdoor outdoor temperature sensor, be arranged on indoor indoor temperature transmitter and the temperature sensor that is arranged on end-equipment is connected, and receive indoor and outdoor temperature and air-conditioning design temperature by the temperature sensor feedback on described outdoor temperature sensor, described indoor temperature transmitter and described end-equipment;
Intelligent controller is connected with the differential pressure pickup being arranged on end-equipment, and receives the data that directly and indirectly gather;
Chilled water pump be provided with temperature sensor, pressure sensor and flow sensor for backwater port, described temperature sensor, pressure sensor and flow sensor are connected with described industrial computer and feed back supply and return water temperature, pressure and the flow of described chilled water pump to described intelligent controller;
Industrial computer is connected with intelligent controller;
Sensor sends duty parameter data to described industrial computer;
Frequency converter is connected with described chilled water pump; The instruction that chilled water pump intelligent controller sends according to industrial computer moves by Frequency Converter Control chilled water pump.
This device has automatic control function, expert's advanced management experience, management mode can be combined with intelligent control technology, therefore feasible system intelligent operation, efficient management, energy-efficient; There is energy-saving control function, by operational analysis, select optimum control program, adjust in time the operating condition of each equipment, guarantee that the operational factor optimums such as flow, temperature and the pressure reduction of system and equipment operating efficiency are the highest, thereby make system energy efficiency the highest; Motor-driven valve automatic control pattern is provided; Have system monitoring function, system parameter setting function, can facilitate and revise according to the actual requirements or adjust; There is data statistic analysis function, system to electricity power monitor, record, statistics and analysis, and provide the data such as energy consumption curve, main frame efficiency curve, operation note and failure logging, so that whole system ruuning situation is done multianalysis and to be reviewed; Also possess fault alarm function, the each technological parameter of the system that is provided with and equipment alarm management, type of alarm is sound, light warning and software picture disply alarm etc.
The utility model embodiment, has following beneficial effect: the utility model can be found out valve opening maximum according to the dynamic aperture of tail end of central air conditioner least favorable end valve door
supply return main's pressure reduction with place chilled water system circulation line
between dynamic relationship realize the poor energy-conservation control action of tail end of central air conditioner chilled water system transformation, can improve the deficiency of the poor and constant temperature of current freezing water system of central air conditioner level pressure and constant difference technology, a kind of technology that can be used for reducing chilled water system operation energy consumption and provide the burden requirement of meeting consumers' demand is provided, can strengthen the control for energy consumption system, reduce unnecessary energy resource consumption, there is important Social benefit and economic benefit for improving efficiency of energy utilization.The utlity model has compact conformation, the advantage that operational efficiency is high.
Claims (3)
1. the poor control device of transformation based on end air-conditioning equipment chilled water valve opening, is characterized in that, comprises intelligent controller, frequency converter, sensor, industrial computer and chilled water pump;
Described intelligent controller be arranged on outdoor outdoor temperature sensor, be arranged on indoor indoor temperature transmitter and the temperature sensor that is arranged on end-equipment is connected, and receive indoor and outdoor temperature and air-conditioning design temperature by the temperature sensor feedback on described outdoor temperature sensor, described indoor temperature transmitter and described end-equipment;
Described intelligent controller is connected with the differential pressure pickup being arranged on end-equipment, and receives the data that directly and indirectly gather;
Described chilled water pump be provided with temperature sensor, pressure sensor and flow sensor for backwater port, described temperature sensor, pressure sensor and flow sensor are connected with described industrial computer and feed back supply and return water temperature, pressure and the flow of described chilled water pump to described intelligent controller;
Described industrial computer is connected with intelligent controller.
2. the poor control device of transformation based on end air-conditioning equipment chilled water valve opening according to claim 1, is characterized in that, described sensor sends duty parameter data to described industrial computer.
3. the poor control device of transformation based on end air-conditioning equipment chilled water valve opening according to claim 1, is characterized in that, described frequency converter is connected with described chilled water pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420285296.1U CN203869259U (en) | 2014-05-30 | 2014-05-30 | Variable pressure difference control device based on openness of chilled water valve of tail-end air conditioning equipment |
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| CN201420285296.1U CN203869259U (en) | 2014-05-30 | 2014-05-30 | Variable pressure difference control device based on openness of chilled water valve of tail-end air conditioning equipment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104566785A (en) * | 2014-12-15 | 2015-04-29 | 郑州轻工业学院 | Intelligent distribution method and intelligent distribution system for refrigerating capacity of central air conditioner |
| CN105066358A (en) * | 2015-08-17 | 2015-11-18 | 烟台荏原空调设备有限公司 | Method and system for automatically adjusting temperature of air conditioning unit |
| CN105114294A (en) * | 2015-08-27 | 2015-12-02 | 中节能（常州）城市节能研究院有限公司 | Intelligent water pump control cabinet of centralized energy supply system |
| CN106016623A (en) * | 2016-06-18 | 2016-10-12 | 杭州滨创能源科技有限公司 | Building air conditioner water wireless network distribution self-discipline intelligent energy-saving controller and control method |
| CN106440549A (en) * | 2016-05-30 | 2017-02-22 | 靳凯 | Control system for increasing comprehensive energy efficiency ratio of central air conditioning system |
| CN112432269A (en) * | 2020-11-27 | 2021-03-02 | 上海碳索能源服务股份有限公司 | Method and system for optimizing set value of pressure difference of refrigerating water pump of refrigerating room |
| CN114576812A (en) * | 2021-12-01 | 2022-06-03 | 华信咨询设计研究院有限公司 | Variable flow control method and system for water supply temperature time-varying cold water system |
-
2014
- 2014-05-30 CN CN201420285296.1U patent/CN203869259U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104566785A (en) * | 2014-12-15 | 2015-04-29 | 郑州轻工业学院 | Intelligent distribution method and intelligent distribution system for refrigerating capacity of central air conditioner |
| CN104566785B (en) * | 2014-12-15 | 2017-04-26 | 郑州轻工业学院 | Intelligent distribution system for refrigerating capacity of central air conditioner |
| CN105066358A (en) * | 2015-08-17 | 2015-11-18 | 烟台荏原空调设备有限公司 | Method and system for automatically adjusting temperature of air conditioning unit |
| CN105066358B (en) * | 2015-08-17 | 2018-03-23 | 荏原冷热系统（中国）有限公司 | A kind of air-conditioner set automatically adjusts the method and system of temperature |
| CN105114294A (en) * | 2015-08-27 | 2015-12-02 | 中节能（常州）城市节能研究院有限公司 | Intelligent water pump control cabinet of centralized energy supply system |
| CN106440549A (en) * | 2016-05-30 | 2017-02-22 | 靳凯 | Control system for increasing comprehensive energy efficiency ratio of central air conditioning system |
| CN106016623A (en) * | 2016-06-18 | 2016-10-12 | 杭州滨创能源科技有限公司 | Building air conditioner water wireless network distribution self-discipline intelligent energy-saving controller and control method |
| CN112432269A (en) * | 2020-11-27 | 2021-03-02 | 上海碳索能源服务股份有限公司 | Method and system for optimizing set value of pressure difference of refrigerating water pump of refrigerating room |
| CN114576812A (en) * | 2021-12-01 | 2022-06-03 | 华信咨询设计研究院有限公司 | Variable flow control method and system for water supply temperature time-varying cold water system |
| CN114576812B (en) * | 2021-12-01 | 2023-12-26 | 华信咨询设计研究院有限公司 | Variable flow control method and system for water supply temperature time-varying cold water system |
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Address after: 311200 north of 2 Road south of Xiaoshan District Economic Development Zone, Hangzhou, Zhejiang, 105 floor 1, 4 building, 14 Road East. Patentee after: Zhejiang energy Polytron Technologies Inc Address before: 361000 104/105 unit 23, Wang Hai Road, software park, Xiamen, Fujian. Patentee before: Xiamen Lis Technology Co., Ltd. |