CN103267013A - Variable flow water system energy-saving method based on combination of large pump and small pump - Google Patents
Variable flow water system energy-saving method based on combination of large pump and small pump Download PDFInfo
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- CN103267013A CN103267013A CN2013102013463A CN201310201346A CN103267013A CN 103267013 A CN103267013 A CN 103267013A CN 2013102013463 A CN2013102013463 A CN 2013102013463A CN 201310201346 A CN201310201346 A CN 201310201346A CN 103267013 A CN103267013 A CN 103267013A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000007788 liquid Substances 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 8
- 230000008676 import Effects 0.000 claims description 6
- 210000003296 saliva Anatomy 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 230000007423 decrease Effects 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
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- 238000010438 heat treatment Methods 0.000 abstract description 2
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- 241000196324 Embryophyta Species 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
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- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Abstract
The invention provides a variable flow water system energy-saving method based on combination of a large pump and a small pump. By means of the variable flow water system energy-saving method, the working conditions of an existing water system are analyzed and rectified, an appropriate new water pump is selected for the existing water system again, the conditions that the existing water system is low in efficiency and high in energy consumption are improved or eliminated, so that the working efficiency of the water system is improved, a motor of the water pump operates stably, the phenomena of heating, vibration, noise, gas etching and the like are effectively restrained, and the problem that under different working situations, the water pump is unreasonably matched with a system pipe net is solved. Experimental data are compared, the result shows that power consumption of the water system can be greatly saved through the variable flow water system energy-saving method, and the energy-saving effect is obvious. The selected new water pump not only can meet the demands of the existing water pump, but also keeps the subsequent extending space. The designing and manufacturing cost of the water system is reduced.
Description
Technical field
The present invention relates to a kind of flow-changing water energy saving of system method based on big or small pump associating.
Background technique
Water is carried or the circulatory system is widely used in fields such as cooling, circulation, feedwater, and its power consumption is huge, reaches 20% of world's electric quantity consumption.In water conveying or the circulatory system, exist water pump and system pipe network to mate irrational problem in a large number, cause great energy waste.
Soft ring pumping plant cooling circulating water system with Stainless Steel Plant, somewhere, northwest is example, cooling circulating water system adopts the control of unsteady flow amount, under operating conditions, be delivered to plate type heat exchanger from the water of chilled water absorbing well, absorption well by the recycle pump of this system, manual tune plate type heat exchanger entrance butterfly valve, the temperature of keeping two nets are no more than 35 ℃, through plate type heat exchanger and two net backwater heat exchange, after flowing to cooling tower and lowering the temperature, flow back to absorbing well, absorption well, so move in circles.
The energy consumption of soft ring pumping plant cooling circulating water system mainly is to be produced by water pump.In practical project, the conventional design of water system and pump selection are usually pressed the most unfavorable processing condition design and coupling, and for unilateral pursuit safety, have generally all given the safety coefficient of 110%-150% in design selection; Summer, exit of pump valve wide open, water pump were in flow bigger than normal, the operation of efficient district in order to keep the temperature of two nets, and energy consumption increases; , in order to keep two net temperature " supercooling " and to exit of pump valve adjust because outdoor temperature is low winter, caused a large amount of headlosses at outlet valve, causes energy consumption to increase.
At present differ greatly, move more stable water system at this winter in summer operating mode, adopt the power save mode of variable frequency adjustment mostly, but can not play the effect of thorough energy-saving and emission-reduction, the best regulation range of frequency conversion is that 3～5% and frequency variator cost of whole system is than higher, so seek a kind of more suitably energy-conservation method for correcting error for 40-45Hz, the power consumption of frequency variator own only in addition.
Summary of the invention
The invention provides a kind of flow-changing water energy saving of system method based on the associating of big or small pump, its objective is and utilize this method that the conveying of water and the circulatory system are realized energy-saving run, solve water pump and mate the unreasonable energy consumption problem that causes with system pipe network.
A kind of flow-changing water energy saving of system method based on big or small pump associating may further comprise the steps:
Step 1: measure existing water system in the operating mode service data of winter, Xia Liangji;
Step 2: the operating mode that records according to step 1 detects and keeps in repair existing water system pipe network;
Step 3: surpass a day of 4 °～8 ° of the temperature same period at summer and winter temperature respectively, the actual conditions of the water system after acquisition testing and the maintenance, i.e. pump head and pump capacity are calculated in repeating step 1 described measurement;
Step 4: choose the water pump that meets exit of pump flow and pump head in the described actual conditions of step 3 and be operated in high efficiency area of pump operation and replace water pump in the existing water system;
Described high efficiency area of pump operation refers to be not less than the efficiency area scope that the pump efficiency peak plays decline 5%-8%;
Wherein, the operating mode service data of existing water system comprises in the described step 1:
(1) the nameplate parameter of water pump and motor;
Water pump nameplate parameter comprises rated flow, rated head, rated speed and necessary electromotor power;
The motor nameplate parameter comprises rated current, voltage rating, rated power, rated speed and power factor;
(2) the operate power P of pump motor;
(3) water pump is into and out of pressure, the flow velocity of saliva node place liquid and go out saliva node flow Q;
(4) heat-exchange device internal resistance;
Pump head formula in the described step 3 is as follows, and pump head was calculated and adopted formula 1 summer, and pump head was calculated and adopted formula (2) winter:
In the formula: p
4, p
3Pressure for exit of pump, import water node place liquid;
v
4, v
3Flow velocity for pump discharge, inlet's liquid;
△ z is the height difference between pump discharge, the inlet pressure meter apparatus;
In the formula: p
6, p
5Be respectively the exit of pump header valve pressure of water node place fluid pressure, import water node place liquid behind the door;
v
6, v
5Flow velocity for pump discharge house steward, inlet's liquid;
△ z
cBe the height difference between pump discharge house steward, the inlet duct pressure meter apparatus;
∑ h is hydraulic loss, refers to the hydraulic loss of whole device pipe-line system, comprises linear loss h
1With the h of local head loss
2
The operating mode that records according to step 1 in the described step 2 detects and keeps in repair existing water system pipe network, and the specific operation step is as follows:
1) detection is to the water flow Q of middle pump intake place of water system
1Water flow Q with the water outlet place of water system pipe network node
2, if differing, both surpass 3%, then run in the decision-making system pipe network, emit, leakage and dripping phenomenon be serious, and check successively from inlet's node and to water system pipe network node water outlet the node that has this phenomenon to be repaired;
2) the internal resistance r of exchanger assembly in the detection water system if checkout value surpasses the rating value that marks on the nameplate, judges that then exchanger assembly work is undesired, and it is keeped in repair;
3) regulate water pump valve aperture to 90%～100%, if observe plugged filter, judge that then filter can not proper functioning, need its cleaning or replacing.
The method of measurement of the operate power of pump motor comprises two kinds in the described step 1: 1) utilize wattmeter directly to measure; 2) measure its operating voltage U, electric current I, and obtain power factor from nameplate
, utilize
Calculate.
In the described step 2, to the detection of node place water flow, also comprise the detection of the water flow of parts and pipeline junction in the whole system, differ the pipeline or the parts that surpass 3% intranodal before and after water flow is measured and keep in repair.
Beneficial effect
The invention provides a kind of flow-changing water energy saving of system method based on big or small pump associating, adopt method provided by the invention by the working condition of existing water system is analyzed and rectified and improved, for it chooses suitable new water pump again, can make the water system poor efficiency, the operating mode of high energy consumption is improved or eliminates, thereby improve the water system working efficiency, and make that the pump motor operation is more steady, heating, vibrations, noise, phenomenons such as cavitation erosion are effectively suppressed, when having solved different operating mode, water pump and system pipe network mate irrational problem, contrast experiment's data, result show, use this method can significantly save water system power consumption, energy-saving effect is remarkable, the new water pump of selecting for use not only can satisfy the demand of current water system, but also has kept later extending space, has reduced the design and manufacture cost of water system.
Description of drawings
Fig. 1 is the structural drawing of certain coke-oven plant's circulation of southwest;
Fig. 2 is the summer condition pipeline schematic representation of certain coke-oven plant's circulation of southwest;
Fig. 3 is the winter condition pipeline schematic representation of certain coke-oven plant's circulation of southwest;
Fig. 4 is the operating mode schematic representation of circulation behind employing the present invention.
Embodiment
The present invention is described further below in conjunction with drawings and Examples.
As shown in Figure 1, structural drawing for certain coke-oven plant's circulation of southwest, Fig. 2 and Fig. 3 are respectively summer condition and the winter condition pipeline schematic representation of certain coke-oven plant's circulation of southwest, this circulation is carried out energy-conservation rectification, adopt a kind of flow-changing water energy saving of system method based on big or small pump associating of the present invention, may further comprise the steps:
Step 1: the operating mode at winter, Xia Liangji of measuring existing water system;
(1) the nameplate parameter of water pump and motor;
Water pump nameplate parameter comprises rated flow, rated head, rated speed and necessary electromotor power;
The motor nameplate parameter comprises rated current, voltage rating, rated power, rated speed and power factor;
(2) the operate power P of pump motor;
Adopt wattmeter to measure or measure electric current I, voltage U, power factor
By formula calculate:
(3) water pump is into and out of pressure, the flow velocity of saliva node place liquid and go out saliva node flow Q;
(4) heat-exchange device internal resistance;
Table 1
Step 2: the operating mode that records according to step 1 detects and keeps in repair existing water system pipe network;
(1) race emits the drip phenomenon to repair to pipe network.
(2) if heat exchange unit internal resistance overrate illustrates that heat-exchange device need keep in repair.
(3) valve wide open, plugged filter is cleaned or is changed.
(4) in a word, all energy dissipation nodes in the pipe network are rectified and improved by power save mode not influencing under the PRODUCTION STATUS.
Step 3: respectively higher one day of summer and winter temperature, the actual conditions of the water system after acquisition testing and the maintenance, i.e. pump head and pump capacity are calculated in repeating step 1 described measurement;
Pump head formula in the described step 3 is as follows, and pump head was calculated and adopted formula 1 summer, and pump head was calculated and adopted formula 2 winter, namely used the 1# water pump summer, used the 2# water pump winter:
In the formula: p
4, p
3Pressure for exit of pump, import water node place liquid;
v
4, v
3Flow velocity for pump discharge, inlet's liquid;
△ z is the height difference between pump discharge, the inlet pressure meter apparatus;
In the formula: p
6, p
5Be respectively the exit of pump header valve pressure of water node place fluid pressure, import water node place liquid behind the door; v
6, v
5Flow velocity for pump discharge house steward, inlet's liquid;
△ z
cBe the height difference between pump discharge house steward, the inlet duct pressure meter apparatus;
∑ h is hydraulic loss, refers to the hydraulic loss of whole device pipe-line system, comprises linear loss h
1With the h of local head loss
2
By formula (1) determines summer condition, and Q gets 1400m
3/ h,
Get 52 meters;
By formula (2) determine winter condition, and Q gets 850m
3/ h,
H=50 rice;
Step 4: choose the water pump that meets exit of pump flow and pump head in the described actual conditions of step 3 and be operated in efficient district and replace water pump in the existing water system;
Change 2 water pumps, operational effect such as table 2:
Table 2
During winter condition, in order to make whole unit operation efficient in efficient district range of operation, need to change 1 motor, security level, insulation class according to original motor are carried out the replacing of motor, selecting the motor model for use is Y315L1-4/160KW/380V/289A/0.89/94.5%, 0.89 be the specified power factor of motor, 94.5% is the specified operational efficiency of motor.
In conjunction with Fig. 4, contrast table 1 and table 2 as can be seen, adopt the inventive method after, the pump capacity of circulation has increased, input power has reduced, energy consumption has obviously reduced.
Claims (4)
1. the flow-changing water energy saving of system method based on big or small pump associating is characterized in that, may further comprise the steps:
Step 1: measure existing water system in the operating mode service data of winter, Xia Liangji;
Step 2: the operating mode that records according to step 1 detects and keeps in repair existing water system pipe network;
Step 3: surpass a day of 4 °～8 ° of the temperature same period at summer and winter temperature respectively, the actual conditions of the water system after acquisition testing and the maintenance, i.e. pump head and pump capacity are calculated in repeating step 1 described measurement;
Step 4: choose the water pump that meets exit of pump flow and pump head in the described actual conditions of step 3 and be operated in high efficiency area of pump operation and replace water pump in the existing water system;
Described high efficiency area of pump operation refers to be not less than the efficiency area scope that the pump efficiency peak plays decline 5%-8%;
Wherein, the operating mode service data of existing water system comprises in the described step 1:
(1) the nameplate parameter of water pump and motor;
Water pump nameplate parameter comprises rated flow, rated head, rated speed and necessary electromotor power;
The motor nameplate parameter comprises rated current, voltage rating, rated power, rated speed and power factor;
(2) the operate power P of pump motor;
(3) water pump is into and out of pressure, the flow velocity of saliva node place liquid and go out saliva node flow Q;
(4) heat-exchange device internal resistance;
Pump head formula in the described step 3 is as follows, and pump head was calculated and adopted formula 1 summer, and pump head was calculated and adopted formula 2 winter:
In the formula: p
4, p
3Pressure for exit of pump, import water node place liquid;
v
4, v
3Flow velocity for pump discharge, inlet's liquid;
△ z is the height difference between pump discharge, the inlet pressure meter apparatus;
In the formula: p
6, p
5Be respectively the exit of pump header valve pressure of water node place fluid pressure, import water node place liquid behind the door;
v
6, v
5Flow velocity for pump discharge house steward, inlet's liquid;
△ z
cBe the height difference between pump discharge house steward, the inlet duct pressure meter apparatus;
∑ h is hydraulic loss, refers to the hydraulic loss of whole device pipe-line system, comprises linear loss h
1With the h of local head loss
2
2. the power-economizing method of regime flow water system according to claim 1 is characterized in that, the operating mode that records according to step 1 in the described step 2 detects and keeps in repair existing water system pipe network, and the specific operation step is as follows:
1) detection is to the water flow Q of middle pump intake place of water system
1Water flow Q with the water outlet place of water system pipe network node
2, if differing, both surpass 3%, then run in the decision-making system pipe network, emit, leakage and dripping phenomenon be serious, and check successively from inlet's node and to water system pipe network node water outlet the node that has this phenomenon to be repaired;
2) the internal resistance r of exchanger assembly in the detection water system if checkout value surpasses the rating value that marks on the nameplate, judges that then exchanger assembly work is undesired, and it is keeped in repair;
3) regulate water pump valve aperture to 90%～100%, if observe plugged filter, judge that then filter can not proper functioning, need its cleaning or replacing.
3. the power-economizing method of regime flow water system according to claim 2 is characterized in that, the method for measurement of the operate power of pump motor comprises two kinds in the described step 1: 1) utilize wattmeter directly to measure; 2) measure its operating voltage U, electric current I, and obtain power factor from nameplate
Utilize
Calculate.
4. the power-economizing method of regime flow water system according to claim 1, it is characterized in that, in the described step 2, detection to node place water flow, also comprise the detection of the water flow of parts and pipeline junction in the whole system, differ the pipeline or the parts that surpass 3% intranodal before and after water flow is measured and keep in repair.
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| CN201310201346.3A CN103267013B (en) | 2013-05-27 | 2013-05-27 | A kind of variable water volume system power-economizing method based on the associating of size pump |
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| CN201310201346.3A CN103267013B (en) | 2013-05-27 | 2013-05-27 | A kind of variable water volume system power-economizing method based on the associating of size pump |
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| CN103267013B CN103267013B (en) | 2016-02-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109522641A (en) * | 2018-11-14 | 2019-03-26 | 南京腾图节能科技有限公司 | The calculation method of the minimum lift of water pump when a kind of exit of pump valve standard-sized sheet |
| CN115017744A (en) * | 2022-08-08 | 2022-09-06 | 河北建投水务投资有限公司 | Modeling method and system of groundwater source water supply hydraulic calculation model |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4518318A (en) * | 1983-07-07 | 1985-05-21 | Grundfos A/S | Pumping sets |
| GB2314412A (en) * | 1996-06-19 | 1997-12-24 | Richard Czaja | Method of monitoring pump performance |
| CN201763589U (en) * | 2010-04-21 | 2011-03-16 | 上海易齐节能科技有限公司 | High-efficiency dynamic correcting and energy-saving system for working condition point of fluid circulating pump |
| CN102562561A (en) * | 2011-12-27 | 2012-07-11 | 酒泉钢铁(集团)有限责任公司 | Method for analyzing operation energy efficiency of pump set of industrial circulating water system |
-
2013
- 2013-05-27 CN CN201310201346.3A patent/CN103267013B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4518318A (en) * | 1983-07-07 | 1985-05-21 | Grundfos A/S | Pumping sets |
| GB2314412A (en) * | 1996-06-19 | 1997-12-24 | Richard Czaja | Method of monitoring pump performance |
| CN201763589U (en) * | 2010-04-21 | 2011-03-16 | 上海易齐节能科技有限公司 | High-efficiency dynamic correcting and energy-saving system for working condition point of fluid circulating pump |
| CN102562561A (en) * | 2011-12-27 | 2012-07-11 | 酒泉钢铁(集团)有限责任公司 | Method for analyzing operation energy efficiency of pump set of industrial circulating water system |
Non-Patent Citations (1)
| Title |
|---|
| 张震伟等: "不同容量循环水泵配置的节能研究", 《电力建设》, vol. 33, no. 4, 30 April 2012 (2012-04-30), pages 76 - 79 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109522641A (en) * | 2018-11-14 | 2019-03-26 | 南京腾图节能科技有限公司 | The calculation method of the minimum lift of water pump when a kind of exit of pump valve standard-sized sheet |
| CN115017744A (en) * | 2022-08-08 | 2022-09-06 | 河北建投水务投资有限公司 | Modeling method and system of groundwater source water supply hydraulic calculation model |
| CN115017744B (en) * | 2022-08-08 | 2022-11-18 | 河北建投水务投资有限公司 | Modeling method and system of groundwater source water supply hydraulic calculation model |
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| CN103267013B (en) | 2016-02-03 |
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