CN111287950A - Control method for energy-saving operation of water pump - Google Patents
Control method for energy-saving operation of water pump Download PDFInfo
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- CN111287950A CN111287950A CN202010108993.XA CN202010108993A CN111287950A CN 111287950 A CN111287950 A CN 111287950A CN 202010108993 A CN202010108993 A CN 202010108993A CN 111287950 A CN111287950 A CN 111287950A
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- water pump
- rotating speed
- pump
- lift
- flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention provides a control method for energy-saving operation of a water pump, belonging to the technical field of energy conservation of water pumps and comprising the following steps of: s10, acquiring the current running speed of the water pump; s20, determining the required water pump flow Q1 and the required head H1 according to the actual use condition; s30, inquiring a preset optimal rotating speed interval table according to the required water pump flow Q1 and the required head H1 to obtain an optimal rotating speed interval corresponding to the optimal rotating speed interval; the optimal rotating speed interval table is determined according to curves of pump lift-flow, pump lift-shaft power and pump lift-efficiency of a water pump; and S40, if the current operation rotating speed is not in the optimal rotating speed interval, switching the current operation rotating speed to the optimal rotating speed interval. The invention provides a control method for energy-saving operation of a water pump, which can automatically adjust the rotating speed of the water pump according to the use requirement, further change parameters such as the lift and the flow of the water pump and enable the water pump to operate in an optimal rotating speed range with high efficiency all the time, thereby achieving the purpose of energy-saving operation, and has simple use and convenient operation.
Description
Technical Field
The invention relates to the technical field of water pump energy conservation, in particular to a control method for energy-saving operation of a water pump.
Background
Currently, pump type products consume 20% of the world's electrical energy, of which about 50% is wasted, the main cause of waste being long term pump operation in non-efficient areas. In the prior art, the high-efficiency operation area of the water pump cannot be quickly found according to the use requirement when the water pump operates. Meanwhile, when the water pump is installed and debugged on site, the working condition point of the water pump cannot be conveniently determined whether to operate in an efficient area or not because the flow measurement is relatively difficult.
Therefore, a control method which is simple in flow measurement and can automatically adjust the energy-saving operation of the water pump according to the use requirement is urgently needed.
Disclosure of Invention
The invention aims to provide a control method which is simple in flow measurement and can automatically adjust the energy-saving operation of a water pump according to the use requirement.
In order to achieve the above object, the present invention provides the following technical solutions:
a control method for energy-saving operation of a water pump comprises the following steps:
s10, acquiring the current running speed of the water pump;
s20, determining the required water pump flow Q according to the actual use condition1Lift H1；
S30, according to the water pump flow Q of the demand1Lift H1Inquiring a preset optimal rotating speed interval table to obtain an optimal rotating speed interval corresponding to the optimal rotating speed interval; the optimal rotating speed interval table is determined according to curves of pump lift-flow, pump lift-shaft power and pump lift-efficiency of a water pump;
and S40, if the current operation rotating speed is not in the optimal rotating speed interval, switching the current operation rotating speed to the optimal rotating speed interval.
Further, still include:
and S50, monitoring the current water pump operation parameters.
Further, the current water pump operation parameters include a flow Q of the current operation water pump, a pump head H, and a pump power P.
A control system for energy efficient operation of a water pump comprising:
the acquisition module is used for acquiring the rotating speed of the currently running water pump;
the query module is used for querying the water pump flow Q of the actual demand1Lift H1The corresponding preset optimal rotating speed interval; the optimal rotating speed interval table is determined according to curves of pump lift-flow, pump lift-shaft power and pump lift-efficiency of a water pump;
and the control module is respectively connected with the acquisition module and the query module and is used for switching the current running rotating speed to the optimal rotating speed interval when the acquired rotating speed is not positioned in the optimal rotating speed interval.
Further, the acquisition module is also used for monitoring the current water pump operation parameters.
Further, the current water pump operation parameters include the flow Q, the pump head H and the pump power P of the current operation water pump.
Further, the control module adjusts the rotating speed of the water pump according to the data acquired by the acquisition module.
The invention has the beneficial effects that:
the invention provides a control method for energy-saving operation of a water pump, which can automatically adjust the rotating speed of the water pump according to the use requirement, further change parameters such as the lift and the flow of the water pump, and enable the water pump to operate in an optimal rotating speed range with high efficiency all the time, thereby achieving the purpose of energy-saving operation. Simple use, convenient operation and reasonable system setting.
Drawings
FIG. 1 is a graph of water pump head-flow, head-shaft power and head-efficiency
FIG. 2 is a table for comparing the data conversion of water pump performance test
Detailed Description
The invention provides
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
A control method for energy-saving operation of a water pump comprises the following steps:
s10, acquiring the current running speed of the water pump;
s20, according to the actual use conditionDetermining a required water pump flow Q1Lift H1；
S30, water pump flow Q according to requirement1Lift H1Inquiring a preset optimal rotating speed interval table to obtain an optimal rotating speed interval corresponding to the optimal rotating speed interval; the optimal rotating speed interval table is determined according to curves of pump lift-flow, pump lift-shaft power and pump lift-efficiency of a water pump;
the conversion formula of pump lift-flow, pump lift-shaft power and pump lift-efficiency is as follows:
Q1/Q2＝n1/n2
H1/H2＝(n1/n2)2
P1/P2＝(n1/n2)3
wherein n is2At a rated rotation speed, Q2At a rated rotation speed n2Corresponding rated flow rate, H2At a rated rotation speed n2Corresponding rated lift, P2At a rated rotation speed n2Corresponding rated shaft power.
The optimal curves of the pump head-flow, the pump head-shaft power and the pump head-efficiency shown in figure 1 are obtained after conversion.
Fig. 2 is a comparison table for converting the performance of a water pump of a specific model.
In the present embodiment, as can be seen from fig. 2, the rated rotational speed n22940r/min, rated speed n2Corresponding rated flow rate Q2Is 54m3H, rated speed n2Corresponding rated lift H2Is 140.8m and has a rated rotating speed n2The corresponding nominal shaft power is 28.96 kW. Obtaining an optimal rotating speed interval according to a conversion formula, the required flow and the lift;
and S40, if the current operation rotating speed is not in the optimal rotating speed interval, switching the current operation rotating speed to the optimal rotating speed interval.
S50, monitoring the current water pump operation parameters; the current water pump operation parameters comprise the flow Q of the current operation water pump, the pump head H and the pump power P.
In this embodiment 1, through actual required water pump flow, the lift condition, the optimal water pump rotational speed that the automatically regulated selection corresponds has improved the utilization ratio of water pump, has reached energy-conserving effect.
Example 2
A control system for energy efficient operation of a water pump comprising:
the acquisition module is used for acquiring the rotating speed of the currently running water pump;
the query module is used for querying the water pump flow Q of the actual demand1Lift H1The corresponding preset optimal rotating speed interval; the optimal rotating speed interval table is determined according to curves of pump lift-flow, pump lift-shaft power and pump lift-efficiency of a water pump; meanwhile, the acquisition module is also used for monitoring the current water pump operation parameters, and the current water pump operation parameters comprise the flow Q of the current operation water pump, the water pump lift H and the water pump power P.
And the control module is respectively connected with the acquisition module and the query module and is used for switching the current operating rotating speed to the optimal rotating speed interval (see the curves of water pump head-flow, head-shaft power and head-efficiency in figure 1) when the acquired rotating speed is not located in the optimal rotating speed interval.
The control module adjusts the rotating speed of the water pump according to the data acquired by the acquisition module. The control module is a single chip microcomputer in the embodiment.
In this embodiment 2, the rotation speed of the current water pump is obtained by selecting the acquisition module, the corresponding actual flow is obtained according to the derivation formula and the curves of pump head-flow, pump head-shaft power and pump head-efficiency shown in fig. 1, the water pump flow according to the actual demand is compared, the demanded water pump flow and the pump head are input into the control module, and the control module automatically controls the water pump to switch the rotation speed to the optimal rotation speed interval according to the query result of the query module.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (7)
1. A control method for energy-saving operation of a water pump is characterized by comprising the following steps:
s10, acquiring the current running speed of the water pump;
s20, determining the required water pump flow Q according to the actual use condition1Lift H1；
S30, according to the water pump flow Q of the demand1Lift H1Inquiring a preset optimal rotating speed interval table to obtain an optimal rotating speed interval corresponding to the optimal rotating speed interval; the optimal rotating speed interval table is determined according to curves of pump lift-flow, pump lift-shaft power and pump lift-efficiency of a water pump;
and S40, if the current operation rotating speed is not in the optimal rotating speed interval, switching the current operation rotating speed to the optimal rotating speed interval.
2. The method for controlling the energy-saving operation of the water pump according to claim 1, further comprising: and S50, monitoring the current water pump operation parameters.
3. The method for controlling the energy-saving operation of the water pump according to claim 2, wherein the current water pump operation parameters comprise a flow Q, a pump head H and a pump power P of the current water pump.
4. A control system for energy-saving operation of a water pump is characterized by comprising:
the acquisition module is used for acquiring the rotating speed of the currently running water pump;
the query module is used for querying the water pump flow Q of the actual demand1Lift H1The corresponding preset optimal rotating speed interval; the optimal rotating speed interval table is determined according to curves of pump lift-flow, pump lift-shaft power and pump lift-efficiency of a water pump;
and the control module is respectively connected with the acquisition module and the query module and is used for switching the current running rotating speed to the optimal rotating speed interval when the acquired rotating speed is not positioned in the optimal rotating speed interval.
5. The system for controlling the energy-saving operation of the water pump according to claim 4, wherein the obtaining module is further configured to monitor the current operating parameter of the water pump.
6. The system for controlling the energy-saving operation of the water pump according to claim 5, wherein the current water pump operation parameters comprise a flow Q, a pump head H and a pump power P of the current water pump.
7. The system for controlling the energy-saving operation of the water pump according to claim 6, wherein the control module adjusts the rotation speed of the water pump according to the data acquired by the acquisition module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010108993.XA CN111287950A (en) | 2020-02-21 | 2020-02-21 | Control method for energy-saving operation of water pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010108993.XA CN111287950A (en) | 2020-02-21 | 2020-02-21 | Control method for energy-saving operation of water pump |
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| CN111287950A true CN111287950A (en) | 2020-06-16 |
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| CN202010108993.XA Pending CN111287950A (en) | 2020-02-21 | 2020-02-21 | Control method for energy-saving operation of water pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309186A (en) * | 2021-05-31 | 2021-08-27 | 北控水务(中国)投资有限公司 | Water purification plant clean water pool water level management energy-saving control method and system |
| CN115573926A (en) * | 2022-11-21 | 2023-01-06 | 南京群顶科技股份有限公司 | Machine room water pump energy-saving operation method combining BP neural network fitting characteristic curve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106958529A (en) * | 2016-01-11 | 2017-07-18 | 山东省农业机械科学研究院 | A kind of method that pump performance curve is drawn from energy-saving run angle |
| CN109185972A (en) * | 2018-09-11 | 2019-01-11 | 哈尔滨顺易天翔热力技术开发有限公司 | Thermal substation circulating pump optimal regulation method |
| CN110397579A (en) * | 2019-07-08 | 2019-11-01 | 广东美的暖通设备有限公司 | Control method, system and the air-conditioning of the water pump of air-conditioning |
| CN110397580A (en) * | 2019-07-12 | 2019-11-01 | 广东美的暖通设备有限公司 | The control method of water pump, device and air-conditioning system in air-conditioning system |
-
2020
- 2020-02-21 CN CN202010108993.XA patent/CN111287950A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958529A (en) * | 2016-01-11 | 2017-07-18 | 山东省农业机械科学研究院 | A kind of method that pump performance curve is drawn from energy-saving run angle |
| CN109185972A (en) * | 2018-09-11 | 2019-01-11 | 哈尔滨顺易天翔热力技术开发有限公司 | Thermal substation circulating pump optimal regulation method |
| CN110397579A (en) * | 2019-07-08 | 2019-11-01 | 广东美的暖通设备有限公司 | Control method, system and the air-conditioning of the water pump of air-conditioning |
| CN110397580A (en) * | 2019-07-12 | 2019-11-01 | 广东美的暖通设备有限公司 | The control method of water pump, device and air-conditioning system in air-conditioning system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309186A (en) * | 2021-05-31 | 2021-08-27 | 北控水务(中国)投资有限公司 | Water purification plant clean water pool water level management energy-saving control method and system |
| CN115573926A (en) * | 2022-11-21 | 2023-01-06 | 南京群顶科技股份有限公司 | Machine room water pump energy-saving operation method combining BP neural network fitting characteristic curve |
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