CN102536962A - Optimization method of circulating fluid system - Google Patents
Optimization method of circulating fluid system Download PDFInfo
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- CN102536962A CN102536962A CN2012100907471A CN201210090747A CN102536962A CN 102536962 A CN102536962 A CN 102536962A CN 2012100907471 A CN2012100907471 A CN 2012100907471A CN 201210090747 A CN201210090747 A CN 201210090747A CN 102536962 A CN102536962 A CN 102536962A
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Abstract
An optimization method of a circulating fluid system comprises the steps of 1 selecting two ends of each device of an operated circulating fluid system to serve as testing nodal points; 2 computing resistance of each device in a system pipeline according to measurement parameters, and removing the resistance or reducing the resistance to be minimum; 3 testing the operated system pipeline again to obtain a pipeline characteristic equation H=KQ2+delta H, and drawing a pipeline characteristic curve according to the pipeline characteristic equation; 4 obtaining the optimum working condition operation point of a water system on the drew pipeline characteristic curve; and 5 replacing a motive power machine of the system according to the optimum working condition operation point. The optimization method has the advantages of solving a motive power matching problem that 'a big horse pulls a small carriage' in on-line fluid transportation or a cyclic system, greatly reducing energy consumption, enabling energy conservation effect to achieve more than 40%, and prolong service life of the fluid transportation or the cyclic system. An optimization process is simple, obvious in effect and easy to popularize and apply.
Description
Technical field
The invention belongs to FLUID TRANSPORTATION or circulatory system technical field, the optimization method of particularly a kind of circulation of fluid system.Can be used for the various online FLUID TRANSPORTATION or the circulatory system, like the FLUID TRANSPORTATION or the circulatory systems such as central air-conditioning system, metallurgy, iron and steel, oil.
Background technique
The FLUID TRANSPORTATION or the circulatory system are widely used in such as major works fields such as building air-conditioner device, coolings, and its power consumption is huge.At present, ubiquity dynamic power machine and unreasonable, the unscientific problem of system matches in the FLUID TRANSPORTATION or the circulatory system, promptly is commonly called as the phenomenon of " low load with strong power ", causes the significant wastage of the energy, increases huge cost expenditure for practical applications unit.
Summary of the invention
The invention discloses the optimization method of a kind of circulation of fluid system; Solve ubiquity in the FLUID TRANSPORTATION in the existing technology or the circulatory system and the phenomenon of dynamic power machine and " low load with strong power " of system matches existence; Cause the significant wastage of the energy, increase the problem of huge cost for practical applications unit.
The technological scheme that the present invention taked is: the optimization method of a kind of circulation of fluid system is characterized in that: comprise the following steps of carrying out successively:
1. the pressure of each node fluid is measured as test node in each device two ends of circulation of fluid system of choosing operation, and through detecting the lift H that pressure reduction that water pump imports and exports obtains water pump, the characteristic curve of looking into water pump by H obtains the actual flow Q of system
B
2. the resistance that exists according to each device in the measurement parameter computing system pipeline, and eliminate or resistance is reduced to minimum;
3. once more the system pipeline of operation is tested; Obtain the lift H of water pump through the pressure reduction that detects the water pump import and export; The flow Q that the characteristic curve of looking into water pump by H obtains system measures the pond of open system and the geometry discrepancy in elevation △ H of cooling tower, obtains pepeline characteristic equation H=KQ
2+ △ H, and draw out characteristic curve of pipeline in view of the above;
4. on the drafting characteristic curve of pipeline, obtain the C point corresponding and be water system optimum condition operating point with the actual flow QB of system;
5. according to the dynamic power machine of optimum condition operating point replacing system.
Respectively install the resistance that exists in the described step system pipeline 2. and comprise valve opening deficiency, valve or pipeline blockage, heat exchanger internal resistance greater than normal value, elimination valve opening deficiency, valve or pipeline blockage problem, and change problematic heat exchanger; Rerun system then, and carry out described step 3..
The dynamic power machine of described step in 5. is pump.
Advantage of the present invention is: the power matching problem that has solved " low load with strong power " in the online FLUID TRANSPORTATION or the circulatory system; Dynamic power machine efficient exceeds 10% than routine; Energy consumption declines to a great extent, and energy-saving effect reaches more than 40%, and the life-span of the FLUID TRANSPORTATION or the circulatory system prolongs.Make because of strong vibration that inflow-rate of water turbine causes, big noise, poor efficiency, high-power unfavorable operating mode operation through optimization method of the present invention and to be improved or to eliminate; Improve the efficient of dynamic power machine; Dynamic power machine operates steadily; Phenomenons such as no hot, vibration, noise make the dynamic power machine of the online FLUID TRANSPORTATION or the circulatory system be in the operation of optimum condition state.Optimizing process is simple, and effect is obvious, is easy to apply.
Description of drawings
Fig. 1 is that the central air conditioning water system of the embodiment of the invention detects schematic representation.
Fig. 2 is mechanical water pump characteristic of the present invention and characteristic curve of pipeline figure.
Embodiment
Like Fig. 1, shown in 2, by of the be optimized processing of following five steps to certain online central air conditioning water system.
L, employing pressure gauge or vacuum gauge carry out hydrodynamic pressure mensuration to the equipment and the pipeline of central air conditioning water system, and concrete determining method and process are following:
(1) water-in and water-out node a, the b of water pump 2 in the selecting system measure water pump and press H1, H2 into and out of mark, draw pump head H=H2-H1 then, through looking into the characteristic curve of water pump, obtain corresponding current value Q
B
(2) choose heat-exchange device 3 into and out of node c, d, measure pressing of heat-exchange device 3 into and out of mark, try to achieve the heat-exchange device internal resistance of operation, if this internal resistance value, explains then that the work of this heat-exchange device 3 is undesired greater than design load, repair or replace;
(3) measure the pond l of open system and the geometry discrepancy in elevation △ H (referring to Fig. 1) of cooling tower 4.
2, directly measure with wattmeter; Perhaps according to measuring electric current I, voltage U, power because of table Cos φ; Obtain by following formula:
, be used for the change of power consumption before and after the evaluating and optimizing.
3, diagnosis water system pipeline existing problems: check valve leakage, system short-circuit, plugged filter, close valve operation etc. for preventing the water pump overload, if there are these problems, these problems then settle one by one.
4, once more the system pipeline of operation is tested; Obtain the lift H of water pump through the pressure reduction that detects water pump 2 import and export; The characteristic curve of looking into water pump by H obtains the flow Q of system; Measure the pond of open system and the geometry discrepancy in elevation △ H of cooling tower, with lift H, flow Q and how much discrepancy in elevation △ H substitution pepeline characteristic equation H=KQ
2+ △ H tries to achieve the K value, thereby obtains H=KQ
2+ △ H, and draw out characteristic curve of pipeline Y as shown in Figure 2 in view of the above.On drafting characteristic curve of pipeline Y, obtain and system's actual flow (satisfying water system requirement water flow) Q
BCorresponding C point is water system optimum condition operating point C, in Fig. 2, finds the lift H corresponding with optimum condition operating point C
C
5, water-change pump more: press optimal working point (flow Q
B, lift Hc) select new water pump to replace the water pump that original system is installed.
As shown in Figure 2, the X curve is the characteristic curve of pump of original system design and installation, and the Y curve is the characteristic curve of pipeline behind the variety of issue that exists of resolution system, and the Z curve be the high efficiency energy saving pump performance curve of installation after optimization method of the present invention is handled; P is the power curve of original system water pump, and P ' is for optimizing the power curve of back water pump; S is the efficiency curve of original system water pump, and S ' is the efficiency curve of correction back water pump.
B is former design pump operating point: flow Q
B, lift H
B, pump shaft power N
B, pump efficiency η
B
Be equipped with at last and be in optimal working point C operation, most effective water pump, be high efficiency energy saving pump, the operating conditions of this pump is: flow Q
B, lift Hc, air horsepower Nc, efficiency eta c.
Can be known by Fig. 2: intrinsic high-lift pump is actual to be in low lift, big flow, poor efficiency, the operation of high power consumption state, when serious even burn motor.
Among Fig. 2, O, H
B, B, Q
B, O institute region is the energy consumption of former design water pump operation, O, Hc, C, Q
B, O institute region handles the energy consumption of the energy-efficient pump operation of installing the back for adopting optimization method of the present invention, the two difference is energy consumption of saving.Dynamic power machine efficient exceeds 10% than routine, and power saving rate is at 30%-70%, and energy-saving effect is obvious.
Claims (3)
1. the optimization method of a circulation of fluid system is characterized in that: comprise the following steps of carrying out successively:
1. the pressure of each node fluid is measured as test node in each device two ends of circulation of fluid system of choosing operation, and through detecting the lift H that pressure reduction that water pump imports and exports obtains water pump, the characteristic curve of looking into water pump by H obtains the actual flow Q of system
B
2. the resistance that exists according to each device in the measurement parameter computing system pipeline, and eliminate or resistance is reduced to minimum;
3. once more the system pipeline of operation is tested; Obtain the lift H of water pump through the pressure reduction that detects the water pump import and export; The flow Q that the characteristic curve of looking into water pump by H obtains system measures the pond of open system and the geometry discrepancy in elevation △ H of cooling tower, obtains pepeline characteristic equation H=KQ
2+ △ H, and draw out characteristic curve of pipeline in view of the above;
4. on the drafting characteristic curve of pipeline, obtain the C point corresponding and be water system optimum condition operating point with the actual flow QB of system;
5. according to the dynamic power machine of optimum condition operating point replacing system.
2. according to the optimization method of the described circulation of fluid of claim l system; It is characterized in that: the resistance that each device exists in the described step system pipeline 2. comprises that valve opening deficiency, valve or pipeline blockage, heat exchanger internal resistance are greater than normal value; Eliminate valve opening deficiency, valve or pipeline blockage problem, and change problematic heat exchanger; Rerun system then, and carry out described step 3..
3. according to the optimization method of the described circulation of fluid of claim l system, it is characterized in that: the dynamic power machine of described step in 5. is pump.
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|---|---|---|---|
| CN2012100907471A CN102536962A (en) | 2012-03-31 | 2012-03-31 | Optimization method of circulating fluid system |
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| CN2012100907471A CN102536962A (en) | 2012-03-31 | 2012-03-31 | Optimization method of circulating fluid system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742425A (en) * | 2014-01-22 | 2014-04-23 | 江苏双轮泵业机械制造有限公司 | Energy conservation correcting method for water circulation system |
| CN105150828A (en) * | 2015-08-11 | 2015-12-16 | 郑州宇通客车股份有限公司 | Method for determining vehicle cooling system flow matching and electronic water pump parameters |
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Application publication date: 20120704 |