CN102691339B - Energy-saving reforming method for water pumps of water supply system - Google Patents
Energy-saving reforming method for water pumps of water supply system Download PDFInfo
- Publication number
- CN102691339B CN102691339B CN201210184987.8A CN201210184987A CN102691339B CN 102691339 B CN102691339 B CN 102691339B CN 201210184987 A CN201210184987 A CN 201210184987A CN 102691339 B CN102691339 B CN 102691339B
- Authority
- CN
- China
- Prior art keywords
- pump
- flow
- lift
- water supply
- supply system
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses an energy-saving reforming method for water pumps of a water supply system. The method comprises the following steps of: respectively selecting a variable pump and a fixed pump according to actually tested related data of system operation on a site and the actual condition of the site; selecting the maximum variation of the flow for the variable pump, and distributing the rest flow to the fixed pump; and performing automatic frequency control to change the running states of the pumps so as to meet constant pressure water supply under different flow. By the method, the constant pressure water supply under the different flow can be met, and the water pumps can run in a high efficiency zone no matter how the flow changes, so that the efficiency of the system is prevented from being reduced by flow regulation, and the water supply system is in an efficient running state all the time under various different working conditions; and a comprehensive, systematic and thorough method is provided for energy-saving reformation of the water pumps of the constant pressure water supply system, so that the system runs efficiently and saves energy.
Description
Technical field
The present invention relates to pump selection field, particularly a kind of energy-conserving reconstruction method of constant pressure water supply system water pump.
Background technology
According to statistics, can expend and account for 30～70% of water supply cost in water works engineering, expending of water pump accounts for 90% left and right that can expend.In actual motion, the most of less thaies 60% of the efficiency of water pump, the overall efficiency less than 50% of pumping plant, exists larger energy waste.
While using traditional design method to build pumping plant, in order to make operational management and Maintenance and Repair more convenient, the model of common selected water pump is all identical.Lift while selecting pump and flow conventionally adopt putting double face, with the little obtaining value method of holding concurrently greatly, have not only increased initial stage installation cost, also because the long fallback of water pump causes energy waste, in operation, are uneconomical not energy-conservation.
In the today of being becoming tight energy supply day, in reducing energy consumption engineering design, use water pump water supply and energy saving System design technology, correctly carry out Design of Pump Station, water pump can often efficiently be moved, there is substantial economics and social benefit.
Summary of the invention
Technical problem to be solved by this invention is for prior art deficiency, to provide a kind of energy-conserving reconstruction method of constant pressure water supply system water pump, the operational efficiency of raising water pump, energy conservation.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of energy-conserving reconstruction method of constant pressure water supply system water pump, and the method comprises the following steps:
1) learn the pressure P of constant pressure water supply system by Site Detection, maximum stream flow Q
max, minimum discharge Q
min, calculate the required lift H of system, the pressure that wherein P is water system by formula H=P × 102;
2) according to known maximum stream flow Q
maxwith minimum discharge Q
minobtaining variable flow is Δ Q;
3) the best efficiency point parameter of determining pump is (Q
1, H
1), the best efficiency point parameter that becomes pump is (Q
2, H
2), the operating point parameter while becoming pump maximum stream flow is (Q
2max, H
2min);
4) select to make Δ Q at best efficiency point flow Q while becoming pump
2± 16% in, i.e. Q
2max≤ 1.16 Q
2, lift meets H
2minthe requirement of>=H;
5) according to 4) definite relevant parameter, select the water pump that meets above-mentioned performance requirement most;
6), according to selected change pump performance curve, determine and become the operating point (Q of pump in the time of maximum stream flow
2max, H
2min), and H
2min=H;
7), while selecting to determine pump, the flow of determining pump is Q
1=(Q
max-Q
2max)/n, lift H
1equal the required lift H of system, wherein n is for determining pump number of units.
A kind of constant pressure water supply system, comprises in parallel determining pump and become pump, and the pressure of this system is P, maximum stream flow Q
max, minimum discharge Q
min, calculating the required lift H of this system by formula H=P × 102, the best efficiency point parameter flow of determining pump is Q
1, lift is H
1; The best efficiency point parameter flow that becomes pump is Q
2, lift is H
2; The flow that becomes pump maximum stream flow operating point is Q
2max, lift is H
2min, it is characterized in that Q
2max≤ 1.16 Q
2, lift meets H
2minthe requirement of>=H; The flow of determining pump is Q
1=(Q
max-Q
2max)/n, lift H
1equal the required lift H of system, wherein n is for determining pump number of units.
Become pump and adopt variable frequency adjustment automatic control mode, meet the constant pressure water supply under different flow, and assure feed water system under various different operating modes all the time in efficient running status, variable frequency adjustment automatic control mode is taking pipe network water pressure (or with discharge) as setup parameter, thereby automatically regulate the rotating speed of pump motor by the output frequency of computer controlled variable frequency device, realize the closed-loop adjustment of pipe network water pressure, make water system automatic constant surely in the force value of setting: when water supply volume increases, frequency raises, pump rotary speed is accelerated, the corresponding increase of output; When water supply volume reduces, frequency reduces, and pump rotary speed slows down, and output is corresponding reducing also, uses the pump that this method is selected at least to exceed 3 ~ 5 percentage points than the pump average efficiency of conventional method selection.
In the time that a change pump can not meet the demand of variable flow Δ Q, can consider that many change pumps regulate, concrete selection method is identical with the selection method of a change pump.
Compared with prior art, the water pump of the method according to this invention type selecting, in the operation of efficient district, has reduced energy consumption, has saved the energy.
Brief description of the drawings
Fig. 1 is one embodiment of the invention water system structural representation;
Fig. 2 is the performance curve of one embodiment of the invention water pump operation; Curve 1: become the performance curve after pump GS400-13M/4B reduction of speed; Curve 2: become the performance curve under pump GS400-13M/4B rated speed; Curve 3: determine the performance curve under pump GS500-19M/4 rated speed; Curve 4: become pump and the performance curve in parallel of determining pump under rated speed; Curve 5: become pump and the performance curve in parallel of determining pump after reduction of speed;
Wherein:
1: pond; 2: butterfly valve; 3: conveying pump; 4: pump discharge pressure table; 5: flap valve; 6: butterfly valve; 7: total hook gauge; 8: supply channel.
Detailed description of the invention
Describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing.
As shown in Figure 1, in figure, in water pump group, blacking represents the water pump moving to one chemical plant water system structural representation, and former pump is two 500S59B parallel runnings, a speed change, and a constant speed, constant pressure, the performance parameter of 500S59B is as follows:
The basic condition of its operation is as follows:
The maximum stream flow Q of system operation
max=3800m
3/ h, minimum discharge Q
min=3400m
3/ h, house steward pressure P=0.44Mpa, pond level is 5m, when maximum stream flow and minimum discharge, the operating point of water pump is as following table:
Water pump causes the high-efficiency point that departs from that water pump 500S59B is larger to move because type selecting is improper as seen from the above table, and whole efficiency should also can improve, and concrete operation step is as follows:
1, select small one and large one two pumps parallel running, constant pressure, and make every pump at maximum stream flow Q
maxminimum discharge Q
mincan be in the operation of efficient district when operation;
2, selection steps is as follows:
1) determine variable flow Δ Q: Δ Q=Q
max-Q
min=3800-3400=400(m
3/ h);
2) determine lift H:H=P × 102-5=0.44 × 102-5=39.88(m that system is required), get H=40m for convenience of type selecting;
3) selection of change pump: select to make Δ Q at operating point flow Q while becoming pump
2± 16% in, can determine and become the best efficiency point flow Q of pump
2≈ 1250m
3/ h, hence one can see that becomes pump Q
2max≤ 1.16 Q
2=1450m
3/ h, H
2min>=H=40m, can select change pump according to sample (sample that the water pump Dou Huiyou water pump producer of every type provides carries out type selecting for pump producer) is GS400-13M/4B, its parameter is as follows:
Can learn and become the operating point of pump when the system maximum stream flow into (1510m by the curve 2 in Fig. 2
3/ h, 40m), efficiency is 86%, water pump, in the operation of efficient district, meets the demands;
4) determine the selection of pump: the best efficiency point flow Q that determines pump
1=Q
max-Q
2max'=3800-1510=2290(m
3/ h), H
1=H=40m.According to (the Q determining
1, H
1) and the type selecting sample model that can make pump be GS500-19M/4, its characteristic curve is the curve 3 in Fig. 2, its parameter is as follows:
Determine pump and move at high-efficiency point, meet the requirement of water pump in the operation of efficient district;
5) when determining pump and becoming the large flow Q that can meet system when pump all moves under rated speed
max=3800m
3the requirement of/h, the curve in parallel of two pumps is curve 4 in Fig. 2; Can meet system minimum discharge Q by 1480 r/min reductions of speed during to 1395 r/min when becoming revolution speed
min=3400m
3the requirement of/h, the curve in parallel of two pumps is curve 5 in Fig. 2, design parameter is as follows:
Can determine and become the operating point of pump when the system minimum discharge into (1110m by pump performance curve after reduction of speed (as the curve 1 in Fig. 2)
3/ h, 40m), efficiency is 84%, and water pump, in the operation of efficient district, meets the demands, and no matter is large flow or low discharge, and it is constant that the pressure of operational system maintains 0.44Mpa, and concrete operating condition is shown in accompanying drawing 2.
3, energy-saving effect comparison
1) in whole efficiency, compare:
When maximum stream flow: total efficiency eta before transformation
always=(79%+79%)/2=79%
Total efficiency eta after transformation
always=(89% × 2290+86% × 1510)/(2290+1510)=87.8%
Efficiency improves 8.8 percentage points.
When minimum discharge: total efficiency eta before transformation
always=(79% × 1895+78% × 1455)/(1895+1455)=78.5%
Total efficiency eta after transformation
always=(89% × 2290+84% × 1110)/(2290+1110)=87.4%
Efficiency improves 8.9 percentage points.
2) in overall energy consumption, compare:
When maximum stream flow: total shaft power P before transformation
always=261 × 2=522(kW)
Total shaft power P after transformation
always=191+280=471(kW)
When minimum discharge: total shaft power P before transformation
always=261+203=464(kW)
Total shaft power P after transformation
always=144+280=424(kW)
The water pump whole efficiency of type selecting is much higher according to the method described above as can be seen here, and energy consumption is much smaller.
Claims (3)
1. an energy-conserving reconstruction method for constant pressure water supply system water pump, is characterized in that, the method comprises the following steps:
1) learn the pressure P of constant pressure water supply system by Site Detection, maximum stream flow Q
max, minimum discharge Q
min, calculate the required lift H of constant pressure water supply system by formula H=P × 102;
2) according to known maximum stream flow Q
maxwith minimum discharge Q
minobtaining variable flow is Δ Q;
3) the best efficiency point parameter flow of determining pump is Q
1, lift is H
1; The best efficiency point parameter flow that becomes pump is Q
2, lift is H
2; The flow that becomes pump maximum stream flow operating point is Q
2max, lift is H
2min;
4) select to make Δ Q at best efficiency point flow Q while becoming pump
2± 16% in, i.e. Q
2max≤ 1.16 Q
2, lift meets H
2minthe requirement of>=H;
5) according to 4) definite parameter, select the water pump that meets above-mentioned performance requirement;
6), according to selected change pump performance curve, determine and become the flow Q of pump in the time of maximum stream flow
2maxwith lift H
2min, and H
2min=H;
7), while selecting to determine pump, the flow of determining pump is Q
1=(Q
max-Q2
max)/n, lift H
1equal the required lift H of system, wherein n is for determining pump number of units.
2. the energy-conserving reconstruction method of constant pressure water supply system water pump according to claim 1, is characterized in that, described change pump is into more than one.
3. a constant pressure water supply system, comprises in parallel determining pump and become pump, and the pressure of this system is P, maximum stream flow Q
max, minimum discharge Q
min, calculating the required lift H of this system by formula H=P × 102, the best efficiency point parameter flow of determining pump is Q
1, lift is H
1; The best efficiency point parameter flow that becomes pump is Q
2, lift is H
2; The flow that becomes pump maximum stream flow operating point is Q
2max, lift is H
2min, it is characterized in that Q
2max≤ 1.16 Q
2, lift meets H
2minthe requirement of>=H; The flow of determining pump is Q
1=(Q
max-Q
2max)/n, lift H
1equal the required lift H of system, wherein n is for determining pump number of units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210184987.8A CN102691339B (en) | 2012-06-06 | 2012-06-06 | Energy-saving reforming method for water pumps of water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210184987.8A CN102691339B (en) | 2012-06-06 | 2012-06-06 | Energy-saving reforming method for water pumps of water supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102691339A CN102691339A (en) | 2012-09-26 |
| CN102691339B true CN102691339B (en) | 2014-07-09 |
Family
ID=46857064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210184987.8A Expired - Fee Related CN102691339B (en) | 2012-06-06 | 2012-06-06 | Energy-saving reforming method for water pumps of water supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102691339B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110210158B (en) * | 2019-06-11 | 2023-06-06 | 长沙凯仁节能技术有限公司 | Transformation method of energy-saving water pump |
| CN112963736A (en) * | 2021-02-22 | 2021-06-15 | 李智才 | Secondary distribution network deep energy-saving diving system and method for heat supply network circulating water pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067698A (en) * | 1992-05-26 | 1993-01-06 | 朴龙奎 | The throttle type pneumatic installation water supply of miniaturization, constant voltageization |
| JPH10195939A (en) * | 1997-01-16 | 1998-07-28 | Teraru Kyokuto:Kk | Water supply equipment to prevent rotting of water |
| RU2284394C2 (en) * | 2004-12-02 | 2006-09-27 | Михаил Юрьевич Озеров | Water-supply system control method |
| CN101696684A (en) * | 2009-10-15 | 2010-04-21 | 杭州源流科技有限公司 | Self-circulation table-type pump performance experiment system |
-
2012
- 2012-06-06 CN CN201210184987.8A patent/CN102691339B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067698A (en) * | 1992-05-26 | 1993-01-06 | 朴龙奎 | The throttle type pneumatic installation water supply of miniaturization, constant voltageization |
| JPH10195939A (en) * | 1997-01-16 | 1998-07-28 | Teraru Kyokuto:Kk | Water supply equipment to prevent rotting of water |
| RU2284394C2 (en) * | 2004-12-02 | 2006-09-27 | Михаил Юрьевич Озеров | Water-supply system control method |
| CN101696684A (en) * | 2009-10-15 | 2010-04-21 | 杭州源流科技有限公司 | Self-circulation table-type pump performance experiment system |
Non-Patent Citations (2)
| Title |
|---|
| 刘石冈，修振爱等.城镇变频恒压供水的选型和配置.《山东水利科技论坛2006年论文集》.2006, * |
| 樊建军,王峰等.变频调速给水系统水泵选型与运行的优化.《工业用水与废水》.2005,第36卷(第1期), * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102691339A (en) | 2012-09-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105020845B (en) | A kind of air-conditioning system linkage energy-saving control system and method | |
| CN101509680B (en) | Energy-conserving control method for adjusting water pump number in synchronization speed changing flow quantity changing heating system | |
| CN100511068C (en) | Intelligent pressure regulating water supply controlling method | |
| CN102644585B (en) | Air compressor hybrid control system and method | |
| CN206360877U (en) | A kind of optimal control for energy saving system of variable frequency pump parallel running | |
| CN103452824A (en) | Fan and water pump energy saving system adopting minimum power algorithm based on flow-power curve | |
| CN102102962A (en) | Energy-saving regulating and control method and device of industrial cooling water towering pump | |
| CN104153425A (en) | Constant-pressure water supply system | |
| CN105156327A (en) | Energy-saving control method for compressed air industrial screw-type air compressor group control system | |
| CN204902127U (en) | Terminal coordinated control's of air conditioner water system and air conditioner economizer | |
| CN109654887B (en) | Circulating water cooling system and automatic control method thereof | |
| CN104674894A (en) | Partition water supply system and method | |
| CN111237208A (en) | Blade angle step length adjustment control method for optimized operation of single unit of pump station | |
| CN201059715Y (en) | Central air-conditioning freezing stations quality regulating control system | |
| CN203443473U (en) | Open type industrial cooling water system energy efficiency control device | |
| CN102691339B (en) | Energy-saving reforming method for water pumps of water supply system | |
| CN104481893A (en) | Optimized water pump energy conservation control method | |
| CN106443278B (en) | First-time starting test method for pumped storage power station | |
| CN103195522B (en) | Frequency conversion control method of circulating water pumps of two steam turbine generator sets | |
| CN106288602A (en) | A kind of industrial cooling circulating water system and control method thereof | |
| CN100578415C (en) | Pipe network constant pressure intelligent control method | |
| CN201874858U (en) | variable air volume energy-saving low-noise fan | |
| CN110390430A (en) | A kind of frequency conversion type water circulating pump optimizing operation method avoiding frequent start-stop | |
| CN110593355A (en) | Water supply energy consumption reduction method based on pressure control model and PLC | |
| CN211503824U (en) | Water turbine operation condition adjusting device for driving cooling tower fan |
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 | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 410000 C12, science and Technology Park, Jin Rui Valley, 28 Lutian Road, Changsha hi tech Development Zone, Hunan. Patentee after: Changsha Raj energy Polytron Technologies Inc Address before: 410013 No. 96 Tongzi Po Road, Yuelu District, Changsha, Hunan. Patentee before: Changsha Ruize Energy Technology Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20210606 |