CN105068582A - DCS-based high-level water collection cooling tower water level maintaining control method - Google Patents
DCS-based high-level water collection cooling tower water level maintaining control method Download PDFInfo
- Publication number
- CN105068582A CN105068582A CN201510290715.XA CN201510290715A CN105068582A CN 105068582 A CN105068582 A CN 105068582A CN 201510290715 A CN201510290715 A CN 201510290715A CN 105068582 A CN105068582 A CN 105068582A
- Authority
- CN
- China
- Prior art keywords
- water
- water level
- flow
- control module
- dcs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Control Of Non-Electrical Variables (AREA)
Abstract
The present invention provides a DCS-based high-level water collection cooling tower water level maintaining control method. The conventional ideas are changed, and a passive situation is charged to an active situation. A relation curve of level maintaining water feeding flow, water inlet valve opening and water pump frequency is implanted into a DCS control system; when a water level of a cooling tower changes, a water inlet amount and a water loss amount of the cooling tower within a unit time are calculated; a DCS control module adjusts frequency changers of a water inlet valve and a water pump to which a valve opening signal and a frequency changing signal are sent respectively, according to the data of the relation curve, thereby ensuring accordance of ultimate water compensating amount and water loss amount, i.e., maintaining the water level to be normal.
Description
Technical field
The invention belongs to and run control technology field, particularly relate to an a kind of high position based on DCS and receive water cooling tower constant water level control method.
Background technology
The loss of cooling tower comprises evaporation, wind and blowdown, gentle load variations of being bullied affects, vaporization loss is thereupon in continuous change, and rate of water make-up is constant within a certain period of time, therefore water level in water pool rises thereupon or declines, in traditional pond of cooling tower water lev el control, many by pressing water level simple adjustment water intaking valve aperture mode, conventional tower sump area is large, water capacity is large, in short time, the difference of rate of water make-up is not obvious on water level in water pool impact, water level is lower than also not requiring during design water level that water level rises to design load rapidly, the fluctuation that water level exists certain amplitude does not have basic impact to the operation of conventional Tower System yet.The method fluctuation of this controlling water level is comparatively large, is feasible for conventional Tower System to the less demanding situation of water lev el control.
But water cooling tower system is received for a high position, because the water capacity of high-order water leg is little, water surface area is little, the change of water level is for vaporization loss, the change of blowdown flow rate and rate of water make-up is very responsive, adopt the method for controlling water level of conventional tower extensive style that rate of water make-up cannot be regulated in time to make it and lose balance, easily there is comparatively large and SEA LEVEL VARIATION frequently in high-order water leg, easily often there is overflow or continue in low water level operation operating mode for a long time, and keep constant high water stage to run most important to the energy-conservation ideal effect that reaches, conventional water level control method cannot reach and keep constant high water stage, save the requirement of energy consumption to greatest extent.
Therefore, be badly in need of a kind of energy and automatically, in real time the technology that water cooling tower carries out water level detecting and management received for a high position.
Summary of the invention
For solving the problem, the invention provides an a kind of high position based on DCS and receiving water cooling tower constant water level control method, it is characterized in that, comprise the steps:
Step 1., under the condition that water pump frequency is identical, changes water intaking valve valve opening, and measuring corresponding discharge, is horizontal ordinate with valve opening, take discharge as the relation curve that ordinate draws valve opening and discharge; Then, water pump frequency shift, draws the relation curve of the frequency lower valve aperture after change and discharge; So repeatedly, until the relation curve of valve opening under determining different frequency and refill flow;
Step 2. by relation curve stored in DCS control module;
Step 3. measures the water level of cooling tower water leg reality;
Step 4. judges whether the water level of water leg reality is ordinary water level, if so, does not then carry out any operation, if not, then performs step 5;
It is higher than ordinary water level or lower than ordinary water level that step 5. judges, wherein:
If lower than ordinary water level, then DCS control module carries out following steps:
Step 1: valve open is intake, until return to ordinary water level;
During step 2:DCS control module calculates moisturizing in the unit interval flow of inlet water of cooling tower water intaking valve and damage by water consume offset after the reality of water leg obtain refill flow;
Obtain refill flow=water level ascending amount * gauge glass area/moisturizing time in fact.
The dimension position refill flow of water in the step 3:DCS control module unit of account time, described dimension position refill flow equals the difference of unit interval valve flow of inlet water and the actual refill flow of cooling tower;
Dimension position refill flow=flow of inlet water-reality obtains refill flow;
Step 4:DCS control module searches water pump frequency corresponding to dimension position refill flow and valve opening in graph of relation;
Step 5:DCS control module, according to relation curve data, regulates the frequency converter of water intaking valve, water pump;
If higher than ordinary water level, then DCS control module carries out following steps:
Step 1: reduce the number percent of water pump frequency to setting, detect after setting-up time and whether return to ordinary water level;
If return to ordinary water level, then the dimension position refill flow of water in the DCS control module unit of account time, described dimension position refill flow equal the water level decreasing flow of unit interval flow of inlet water and water leg and; Wherein
Water level decreasing flow=water level decreasing height * gauge glass area/moisturizing time;
Dimension position refill flow=flow of inlet water+water level decreasing flow;
If water level continues to rise, then valve complete shut-down stops moisturizing, until drop to ordinary water level, DCS control module obtains water level decreasing flow and the dimension position refill flow of water leg in the unit interval;
Dimension position refill flow=water level decreasing flow=water level decreasing height * gauge glass area/moisturizing time;
Step 2: search water pump frequency corresponding to dimension position refill flow and valve opening in graph of relation;
Step 3:DCS control module, according to relation curve data, sends to water intaking valve to valve opening signal, frequency variation signal, the frequency converter of water pump regulates.
Further, when actual water level is lower than ordinary water level, valve wide open carries out moisturizing.
Further, DCS control module selects the curve that water pump frequency is minimum, the valve opening signal of correspondence, frequency variation signal is sent to water intaking valve, the frequency converter of water pump regulates.
Further, utilize liquid level meter to carry out water level signal detection, described liquid level meter sends liquid level signal to DCS control module, and DCS control module carries out series of computation according to liquid level signal.
Beneficial effect of the present invention is;
The present invention makes full use of computing and the logic control function of DC, is lost water yield value accurately.Set by logic, DCS automatically selects the most energy-conservation water pump frequency and valve opening combination in built-in relation curve point, and exports control signal feed pump and valve, ensures that rate of water make-up is consistent with the loss water yield.The present invention can effective controlling water level luffing, realizes the object of energy saving of system simultaneously.
Accompanying drawing explanation
Fig. 1 is relation curve schematic diagram.
Fig. 2 is pump variable frequency performance diagram.
Fig. 3 is water level decreasing Interval logic control chart.
Fig. 4 is water level first transition logic control chart.
Embodiment
Below in conjunction with specific embodiment, invention is further described.
Design concept of the present invention is: traditional method for controlling water level cannot keep the reason of constant water level to be cannot accurately by the loss water yield (wind, evaporation, blowdown three) of apparatus measures cooling tower, and valve water level regulates owned by France in the passive control method catching up with type.The present invention changes thinking in the past, change from passive to active, to tie up position refill flow, water intaking valve valve opening and water pump frequency dependence in advance implants in DCS control system, when cooling tower SEA LEVEL VARIATION, calculate the amount of inlet water of cooling tower in the unit interval and the loss water yield, DCS control module is according to relation curve data, water intaking valve is sent to valve opening signal, frequency variation signal, the frequency converter of water pump regulates, ensure that final rate of water make-up is consistent with waste, can water level be maintained normal.
Below technical scheme of the present invention is introduced.
Realize hardware of the present invention and comprise water intaking valve, the water pump be connected with water intaking valve, fluid level announciator, DCS control module.Described water intaking valve, water pump, fluid level announciator all communicate to connect with DCS control module.
Described fluid level announciator is installed in cooling tower, for gathering liquid level signal;
DCS control module is implanted inlet valve aperture, water pump frequency, dimension position refill flow triadic relation curve map, described DCS computing module is used for processing liquid level signal, calculate the dimension position refill flow that cooling tower maintains constant water level needs, by valve opening signal, frequency variation signal, flowrate control valve, water pump frequency are regulated according to dimension position refill flow.
Described water intaking valve, water pump receive valve opening amount signal, frequency variation signal respectively, and to cooling tower water inlet with moisturizing.
First, for Fig. 1, described inlet valve aperture, water pump frequency, dimension position refill flow triadic relation curve are introduced: under the condition that water pump frequency is identical, change valve opening, measure corresponding discharge, being horizontal ordinate with valve opening, take discharge as the relation curve that ordinate draws valve opening and discharge; Then, water pump frequency shift, draws the relation curve of the frequency lower valve aperture after change and discharge; So repeatedly, until the relation curve of valve opening under determining different frequency and refill flow.
In Fig. 1 of the present embodiment, three curves are from top to bottom respectively relation curve when water pump frequency is 100%, 95%, 90%.Concrete frequency change gradient can be chosen according to actual, is drawn voluntarily by test and water force.
Be implanted in advance in DCS control module by relation curve is the key reaching the object of the invention, which achieves displaying directly perceived and the coordinated signals of relation between water intaking valve valve opening, water pump frequency, dimension position refill flow, solve in prior art to lean on and manually go by rule of thumb to control and the quagmire that causes, achieve the object of precise and high efficiency controlling water level.
Preferably, DCS selects that small pump frequency is minimum, the maximum scheme of valve opening automatically.This is because the adjustment power consumption of valve is consumed energy higher than water pump frequency adjustment.
Fig. 2 is pump variable frequency family curve.Horizontal ordinate Q represents flow, and ordinate H represents hydraulic pressure.In water system, when water consumption changes, pump operating point generally to be regulated to make the system water yield reach balance.When not adopting speed governing measure, when required flow is reduced to Q1 by Q0, the aperture of valve on pipeline need be reduced, making pump work at A0
point, now (H0
-H1) head will waste, the shaft power of pump is Q1 × H0
.When adopting adjustable speed water pump, can lower rotating speed and become n1, pump operating point will change to A1, and shaft power is Q1 × H1.As can be seen from Figure, governor impeller is adopted can to reduce shaft power Q1 × (H0
-H1), the energy-saving principle of Here it is pump speed control.In addition, when valve regulated operating point amplitude of variation is larger, pump efficiency may decline, even finally leave efficient section, and gearshift adjustment theoretically under each similar operating condition of water pump the efficiency of corresponding point be substantially all efficient district, namely pump operating point changes within the specific limits, and pump efficiency does not decline.Can find out from above-mentioned analysis, why energy-conservation pump speed control runs, and one is that speed governing can reduce lift waste, and two is that after speed governing, water pump is substantially all run in efficient district scope, can ensure that water pump still can have higher efficiency when fluctuations in discharge amplitude is larger.
Below the method for the invention is described.
The water level that this method comprises upper and lower two regional extents of datum level regulates, and is respectively water level decreasing interval, water level first transition.
Fig. 3 and Fig. 4 is respectively water level decreasing interval, water level first transition logic control example.Now illustrate respectively.
As shown in Figure 3, water leg ordinary water level is 13.7m, water level decreasing 0.1 meter (0.1 meter is preset value), and valve wide open, the flow of inlet water of unit interval is Q
entirely, after elapsed time Δ t, water level rises to 13.7 meters, owing to carrying out water consumption in moisturizing process always, needs the damage by water vector recognized in the unit interval during this period of time.
According to water level ascending amount 0.1 and water level rise time Δ t, obtain rate of rise V=0.1/ Δ t.If cooling tower water bit surface area is S, then in the unit interval water leg water inlet water outlet offset after the actual rate of water make-up obtained be Δ Q=V*S, and then obtain the amount Q of water loss in the unit interval
moisturizing=Q
entirely-Δ Q.Q
moisturizingnamely DCS computing module is follow-up needs the dimension position refill flow controlling water intaking valve and water pump realization.
DCS, according to built-in curve, searches Q
moisturizingcorresponding water pump frequency and valve opening, and the curve data that prioritizing selection water pump frequency is minimum, and valve opening signal, frequency variation signal are passed to the frequency converter of water intaking valve, water pump, make the rate of water make-up of water tower in the unit interval consistent with loss amount, maintain normal level to make cooling tower water level.
As shown in Figure 4, water leg ordinary water level is 13.7m, and water level rises 0.1 meter, and water pump frequency drops to 80% and carries out moisturizing (can be also the number percent of other settings, choose as the case may be), and the refill flow in the now unit interval is Q
80%.In observing time Δ t, whether water level drops to 13.7 meters.
If then according to water level decreasing height 0.1 and water level rise time Δ t, obtain drawdown rate of water level V=0.1/ Δ t.If cooling tower water bit surface area is S, then the moisturizing difference in the unit interval is Δ Q=V*S, and then to obtain required rate of water make-up in the unit interval be Q
moisturizing=Q
80%+ Δ Q.
If not, then valve complete shut-down, waits water level to drop to 13.7 meters due to loss, according to water level decreasing height and water level rise time Δ t, obtains drawdown rate of water level V.If cooling tower water bit surface area is S, then in the unit interval water leg water inlet water outlet offset after the actual rate of water make-up obtained be Δ Q=V*S, and then to obtain required dimension position refill flow in the unit interval be Q
moisturizing=Δ Q.
DCS, according to built-in curve, searches Q
moisturizingcorresponding water pump frequency and valve opening, and the curve data that prioritizing selection frequency is minimum, then valve opening signal, frequency variation signal are passed to the frequency converter of water intaking valve, water pump, make rate of water make-up in the unit interval consistent with loss amount, cooling tower water level maintains normal level.
To sum up, workflow of the present invention can be summarized as:
Step 1., under the condition that water pump frequency is identical, changes water intaking valve valve opening, and measuring corresponding discharge, is horizontal ordinate with valve opening, take discharge as the relation curve that ordinate draws valve opening and discharge; Then, water pump frequency shift, draws the relation curve of the frequency lower valve aperture after change and discharge; So repeatedly, until the relation curve of valve opening under determining different frequency and refill flow;
Step 2. by relation curve stored in DCS control module;
Step 3. measures the water level of cooling tower water leg reality;
Step 4. judges whether the water level of water leg reality is ordinary water level, if so, does not then carry out any operation, if not, then performs step 5;
It is higher than ordinary water level or lower than ordinary water level that step 5. judges, wherein:
If lower than ordinary water level, then DCS control module carries out following steps:
Step 1: valve open is intake, until return to ordinary water level;
Preferably, valve wide open carries out moisturizing, and speed is fast and energy-conservation.
During step 2:DCS control module calculates moisturizing in the unit interval flow of inlet water of cooling tower water intaking valve and damage by water consume offset after the reality of water leg obtain refill flow;
Obtain refill flow=water level ascending amount * gauge glass area/moisturizing time in fact.
The dimension position refill flow of water in the step 3:DCS control module unit of account time, described dimension position refill flow equals the difference of unit interval valve flow of inlet water and the actual refill flow of cooling tower;
Dimension position refill flow=flow of inlet water-reality obtains refill flow;
Step 4:DCS control module searches water pump frequency corresponding to dimension position refill flow and valve opening in graph of relation;
Step 5:DCS control module, according to relation curve data, regulates the frequency converter of water intaking valve, water pump.
If higher than ordinary water level, then DCS control module carries out following steps:
Step 1: reduce the number percent of water pump frequency to setting, detect after setting-up time and whether return to ordinary water level;
If return to ordinary water level, then the dimension position refill flow of water in the DCS control module unit of account time, described dimension position refill flow equal the water level decreasing flow of unit interval flow of inlet water and water leg and; Wherein,
Water level decreasing flow=water level decreasing height * gauge glass area/moisturizing time;
Dimension position refill flow=flow of inlet water+water level decreasing flow;
If water level continues to rise, then valve complete shut-down stops moisturizing, until drop to ordinary water level, DCS control module obtains water level decreasing flow and the dimension position refill flow of water leg in the unit interval;
Dimension position refill flow=water level decreasing flow=water level decreasing height * gauge glass area/moisturizing time;
Step 2: search water pump frequency corresponding to dimension position refill flow and valve opening in graph of relation;
Step 3:DCS control module, according to relation curve data, sends to water intaking valve to valve opening signal, frequency variation signal, the frequency converter of water pump regulates.
Preferably, DCS control module selects the curve that water pump frequency is minimum, the valve opening signal of correspondence, frequency variation signal is sent to water intaking valve, the frequency converter of water pump regulates.
Beneficial effect of the present invention is;
The present invention makes full use of computing and the logic control function of DC, is lost water yield value accurately.Set by logic, DCS automatically selects the most energy-conservation water pump frequency and valve opening combination in built-in relation curve point, and exports control signal feed pump and valve, ensures that rate of water make-up is consistent with the loss water yield.The present invention can effective controlling water level luffing, realizes the object of energy saving of system simultaneously.
Claims (4)
1. the high position based on DCS receives water cooling tower constant water level control method, it is characterized in that, comprises the steps:
Step 1., under the condition that water pump frequency is identical, changes water intaking valve valve opening, and measuring corresponding discharge, is horizontal ordinate with valve opening, take discharge as the relation curve that ordinate draws valve opening and discharge; Then, water pump frequency shift, draws the relation curve of the frequency lower valve aperture after change and discharge; So repeatedly, until the relation curve of valve opening under determining different frequency and refill flow;
Step 2. by relation curve stored in DCS control module;
Step 3. measures the water level of cooling tower water leg reality;
Step 4. judges whether the water level of water leg reality is ordinary water level, if so, does not then carry out any operation, if not, then performs step 5;
It is higher than ordinary water level or lower than ordinary water level that step 5. judges, wherein:
If lower than ordinary water level, then DCS control module carries out following steps:
S1: valve open is intake, until return to ordinary water level;
During S2:DCS control module calculates moisturizing in the unit interval flow of inlet water of cooling tower water intaking valve and damage by water consume offset after the reality of water leg obtain refill flow;
Obtain refill flow=water level ascending amount * gauge glass area/moisturizing time in fact.
The dimension position refill flow of water in the S3:DCS control module unit of account time, described dimension position refill flow equals the difference of unit interval valve flow of inlet water and the actual refill flow of cooling tower;
Dimension position refill flow=flow of inlet water-reality obtains refill flow;
S4:DCS control module searches water pump frequency corresponding to dimension position refill flow and valve opening in graph of relation;
S5:DCS control module, according to relation curve data, regulates the frequency converter of water intaking valve, water pump;
If higher than ordinary water level, then DCS control module carries out following steps:
S1: reduce the number percent of water pump frequency to setting, detect after setting-up time and whether return to ordinary water level;
If return to ordinary water level, then the dimension position refill flow of water in the DCS control module unit of account time, described dimension position refill flow equal the water level decreasing flow of unit interval flow of inlet water and water leg and; Wherein
Water level decreasing flow=water level decreasing height * gauge glass area/moisturizing time;
Dimension position refill flow=flow of inlet water+water level decreasing flow;
If water level continues to rise, then valve complete shut-down stops moisturizing, until drop to ordinary water level, DCS control module obtains water level decreasing flow and the dimension position refill flow of water leg in the unit interval;
Dimension position refill flow=water level decreasing flow=water level decreasing height * gauge glass area/moisturizing time;
S2: search water pump frequency corresponding to dimension position refill flow and valve opening in graph of relation;
S3:DCS control module, according to relation curve data, sends to water intaking valve to valve opening signal, frequency variation signal, the frequency converter of water pump regulates.
2. receive water cooling tower constant water level control method based on a high position of DCS as claimed in claim 1, it is characterized in that, when actual water level is lower than ordinary water level, valve wide open carries out moisturizing.
3. receive water cooling tower constant water level control method based on a high position of DCS as claimed in claim 1, it is characterized in that, DCS control module selects the curve that water pump frequency is minimum, the valve opening signal of correspondence, frequency variation signal is sent to water intaking valve, the frequency converter of water pump regulates.
4. receive water cooling tower constant water level control method based on a high position of DCS as claimed in claim 1, it is characterized in that, utilize liquid level meter to carry out water level signal detection, described liquid level meter sends liquid level signal to DCS control module, and DCS control module carries out series of computation according to liquid level signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510290715.XA CN105068582B (en) | 2015-06-01 | 2015-06-01 | DCS-based high-level water collection cooling tower water level maintaining control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510290715.XA CN105068582B (en) | 2015-06-01 | 2015-06-01 | DCS-based high-level water collection cooling tower water level maintaining control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105068582A true CN105068582A (en) | 2015-11-18 |
| CN105068582B CN105068582B (en) | 2017-02-22 |
Family
ID=54497969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510290715.XA Active CN105068582B (en) | 2015-06-01 | 2015-06-01 | DCS-based high-level water collection cooling tower water level maintaining control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105068582B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112180877A (en) * | 2020-10-19 | 2021-01-05 | 浙江工业大学 | Method for determining feedforward coefficient compensation |
| CN112783220A (en) * | 2020-12-30 | 2021-05-11 | 中国长江电力股份有限公司 | Water level maintaining system based on variable-frequency water level maintaining equipment and self-adaptive control method |
| CN112814084A (en) * | 2020-12-30 | 2021-05-18 | 三一汽车制造有限公司 | Fire-fighting water supply cooperative control method and system |
| CN113934235A (en) * | 2021-09-30 | 2022-01-14 | 泉州科牧智能厨卫有限公司 | Self-adaptive water outlet control method and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2097967B (en) * | 1981-05-01 | 1985-02-27 | Fuji Heavy Ind Ltd | Control of engine cooling system |
| CN201210018Y (en) * | 2008-04-02 | 2009-03-18 | 陕西奥升环境工程有限公司 | Cooling tower with water pump |
| CN201463627U (en) * | 2009-04-14 | 2010-05-12 | 陈晓京 | Cooling tower water circulating system |
| CN104075614A (en) * | 2014-04-30 | 2014-10-01 | 大连亿斯德制冷设备有限公司 | Intelligent variable-frequency closed cooling tower |
| CN104317281A (en) * | 2014-11-17 | 2015-01-28 | 广西远望科技有限责任公司 | Energy-saving and water-saving device for distributed control over industrial circulating water and control method thereof |
-
2015
- 2015-06-01 CN CN201510290715.XA patent/CN105068582B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2097967B (en) * | 1981-05-01 | 1985-02-27 | Fuji Heavy Ind Ltd | Control of engine cooling system |
| CN201210018Y (en) * | 2008-04-02 | 2009-03-18 | 陕西奥升环境工程有限公司 | Cooling tower with water pump |
| CN201463627U (en) * | 2009-04-14 | 2010-05-12 | 陈晓京 | Cooling tower water circulating system |
| CN104075614A (en) * | 2014-04-30 | 2014-10-01 | 大连亿斯德制冷设备有限公司 | Intelligent variable-frequency closed cooling tower |
| CN104317281A (en) * | 2014-11-17 | 2015-01-28 | 广西远望科技有限责任公司 | Energy-saving and water-saving device for distributed control over industrial circulating water and control method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112180877A (en) * | 2020-10-19 | 2021-01-05 | 浙江工业大学 | Method for determining feedforward coefficient compensation |
| CN112180877B (en) * | 2020-10-19 | 2021-11-30 | 浙江工业大学 | Method for determining feedforward coefficient compensation |
| CN112783220A (en) * | 2020-12-30 | 2021-05-11 | 中国长江电力股份有限公司 | Water level maintaining system based on variable-frequency water level maintaining equipment and self-adaptive control method |
| CN112814084A (en) * | 2020-12-30 | 2021-05-18 | 三一汽车制造有限公司 | Fire-fighting water supply cooperative control method and system |
| CN112783220B (en) * | 2020-12-30 | 2023-01-13 | 中国长江电力股份有限公司 | Water level maintaining system based on variable-frequency water level maintaining equipment and self-adaptive control method |
| CN113934235A (en) * | 2021-09-30 | 2022-01-14 | 泉州科牧智能厨卫有限公司 | Self-adaptive water outlet control method and system |
| CN113934235B (en) * | 2021-09-30 | 2024-06-21 | 泉州科牧智能厨卫有限公司 | Self-adaptive water outlet control method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105068582B (en) | 2017-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104990450B (en) | A high position based on DCS catchment cooling tower water level maintain system | |
| CN105068582A (en) | DCS-based high-level water collection cooling tower water level maintaining control method | |
| CN103452824B (en) | Based on the energy saving in fans and pumps system of the minimum power algorithm of flow-power curve | |
| CN103195698A (en) | Energy-saving control method for synchronous variable-speed regulation of water pumps in water-level-variable water intake pump station | |
| CN105864016B (en) | A kind of more water pump distributing system variable water volume runing adjustment methods of open type | |
| CN104990134A (en) | Variable flow and household metering centralized heating system and hydraulic balance regulating method | |
| CN106014999A (en) | Efficient running control method for water ring vacuum pump unit and control system | |
| CN102003736A (en) | Heating load stage quality regulation method | |
| CN105543443B (en) | A method of being used for coal gas of converter pressuring machine antisurge control system | |
| CN109284873A (en) | A kind of wisdom drainage pumping plant carrying out pump group Optimized Operation and early warning disposition based on SWMM model | |
| CN206377007U (en) | A kind of oil well interval pumping control system | |
| CN104481893B (en) | Optimized water pump energy conservation control method | |
| CN104674894A (en) | Partition water supply system and method | |
| CN103266646A (en) | Variable frequency variable pressure water supply implementation method and variable frequency variable pressure water supply implementation device | |
| CN108596417A (en) | A kind of step reservoir flood-water resources utilization method based on storage capacity penalty method | |
| CN104674784A (en) | Control device of slope tide level under super gravity | |
| CN201461354U (en) | Variable frequency regulation closed-loop control system of water pump | |
| CN115571289A (en) | Floating wind power equipment load adjusting system based on yaw influence and control method | |
| CN201771737U (en) | Electricity economization controller capable of leading water pump to run at optimum revolution | |
| CN108547760A (en) | Frequency follow-up control method for lift pump of water treatment | |
| CN207636945U (en) | A kind of variable output pressure pressure reducing valve closed-loop control system | |
| CN105631192A (en) | Comprehensive weighted evaluation method of pump unit energy consumption | |
| CN206957665U (en) | A kind of oil pumper takes out control device between not shutting down | |
| CN105571089A (en) | Energy-saving intelligent ecological central air conditioning device | |
| CN204757124U (en) | Unsteady flow volume and central heating system who divides family measurement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |