CN104179670A - Measuring method for energy-saving rate of water pump set after applying remanufacturing technology - Google Patents
Measuring method for energy-saving rate of water pump set after applying remanufacturing technology Download PDFInfo
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Abstract
The invention discloses a measuring method for an energy-saving rate of a water pump set after applying a remanufacturing technology. According to the measuring method, an electricity meter and a flow meter are arranged; power consumption in unit volume is measured based on a stable condition of same or similar flow speed and at an appointed rotary speed to obtain an energy-saving rate index; a water pump operation parameter is measured for two times at a period of two hours; the power consumption in the unit volume of the water pump measured for each time is calculated and is modified to power consumption in unit volume under a water pump shaft power standard condition; the differing rate of modification values of two times of measurement is less than or equal to 0.5% and an average value of the modification values of two times of measurement is an energy consumption standard value; the remanufacturing technology is used for repairing a water pump and the water pump is continuously operated for more than 30 days; the measurement is repeated and calculation is carried out to obtain power consumption in unit volume of the repaired water pump under the water pump shaft power standard condition; the power consumption is used as an energy consumption assessing value; the energy-saving rate is calculated through the energy consumption standard value and the assessing value. The method accurately measures the energy-saving rate of the water pump set after applying the remanufacturing technology, and accurately evaluates the application of the remanufacturing technology so that the aims of energy conservation and emission reduction are achieved.
Description
Technical field
The present invention relates to a kind of method of measurement of applying water pump assembly fractional energy savings after re-manufacturing technology.
Background technique
The re-manufacturing technology (abbreviation re-manufacturing technology) that machinery is in operation is a novel scientific and technological achievement by the qualification of Chinese mechanical industry federation, is the novel energy-conserving technology of National Energy Board's keypoint recommendation, popularization.This technology is not done any transformation to water pump body structure; only by add self repairing agent in water pump bearing lubricant oil; the heat energy that utilizes machinery self friction to produce; dynamically complete the self-repair procedure of metal abrasion; generate excellent performance with the ceramet protective layer of virgin metal without sharp interface; give the physics and chemistry state that wear surface is new; thereby reduction friction factor; reduce the output power of water pump driving motor; reach the object that reduces energy consumption; its application prospect is very considerable, China is realized to target for energy-saving and emission-reduction and be significant.
But re-manufacturing technology is not long in the time of China's commercial Application, the fractional energy savings method of measurement in various kinds of equipment after application is without ripe experience for reference.In GB/T16666-1996 " pump class and liquid conveying system energy-saving detection method " standard, only relate to the calculating of single pump efficiency, the efficiency to whole unit and fractional energy savings are measured several nothings and are related to.The visible unit fractional energy savings relevant to re-manufacturing technology measured NBS and still belonged to space state.
In addition, according to a large amount of field apparatus test and the calculated results, the fractional energy savings of re-manufacturing technology is between 2% to 10%, but the operating conditions of field apparatus is changeable, operating mode factor (as pump entrance liquid level, outlet pressure etc.) changes the water pump per unit volume power consumption fluctuation ratio causing in 6% left and right, how the fractional energy savings of Measurement accuracy re-manufacturing technology after applying on water pump is a difficult problem for this technical field always, is also that this power-saving technology is difficult to the bottleneck of promoting.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method of measurement of applying water pump assembly fractional energy savings after re-manufacturing technology, utilize this method can Measurement accuracy application re-manufacturing technology after the fractional energy savings of water pump assembly, accurate evaluation is made in application to re-manufacturing technology, be conducive to applying of re-manufacturing technology, reach the object of energy-saving and emission-reduction.
For solving the problems of the technologies described above, after the present invention's application re-manufacturing technology, the method for measurement of water pump assembly fractional energy savings comprises the steps:
The electrical power control cabinet of step 1, water pump assembly is provided for measuring the voltameter of water pump assembly power consumption, and water pump assembly outlet conduit is provided for measuring the flowmeter of delivery of pump;
Step 2, setting water pump operation are in the identical or close steady working condition of flow velocity a certain agreement rotating speed, water pump power consumption and flow, lift are relevant, under the condition remaining unchanged at lift, the power consumption of water pump is directly proportional to flow, and setting water pump assembly fractional energy savings index is per unit volume power consumption;
Step 3, water pump per unit volume power consumption is carried out to twice measurement in agreement under rotating speed, and power consumption and water displacement synchro measure, be 2 hours each measuring period, in measuring period, the main entrance pressure of water pump assembly, main entrance liquid level height, general export pressure, general export liquid level height synchro measure, 10 minutes survey data sampling intervals, and marked traffic meter measuring position, while measurement, flowmeter survey position is identical at every turn;
Step 4, each survey data of each measurement is got to arithmetic mean value, and calculates each water pump per unit volume power consumption of measuring by following formula,
In formula (1) and formula (2), H is pump head, and η is pump efficiency, and P is water pump power consumption, and Q is pump capacity, P
outletfor water pump assembly general export pressure, P
entrancefor water pump assembly main entrance pressure, h
enter oral fluid facefor water pump assembly main entrance liquid level height, e is water pump per unit volume power consumption; ρ is the density of water, and g is gravity accleration;
Per unit volume power consumption under step 5, calculating pump shaft power standard condition, revises the water pump per unit volume power consumption of each measurement, and correction factor is:
In formula (3), ζ is correction factor, P
outlet 1water pump assembly general export pressure when measuring for the first time, P
outlet 2water pump assembly general export pressure when measuring for the second time, h
entrance liquid level 1water pump assembly main entrance liquid level height when measuring for the first time, h
entrance liquid level 2water pump assembly main entrance liquid level height when measuring for the second time,
Water pump mark condition per unit volume power consumption e after revising
2for:
e
2＝e*ζ (4)
The phase rate of step 6, the revised water pump mark of twice measurement condition per unit volume power consumption answers≤0.5%, otherwise it is invalid to measure, need to increase and measure number of times until survey data is qualified, after survey data is qualified, get the mean value of the revised water pump mark of twice measurement condition per unit volume power consumption as the energy consumption reference value of water pump under agreement rotating speed;
Step 7, adopt re-manufacturing technology to add renovation agent continuous operation more than 30 days to water pump spindle bearing, under agreement rotating speed, repeating step three, to step 6, measures after re-manufacturing technology water pump mark condition per unit volume power consumption and as energy consumption examination value;
The fractional energy savings of step 8, calculating water pump after re-manufacturing technology is repaired, setting the energy consumption reference value of water pump before repairing is e
j, repair after the energy consumption examination value of water pump be e
b, fractional energy savings ξ is:
By the be applied fractional energy savings of water pump after re-manufacturing technology of formula (5).
Further, the measuring accuracy of above-mentioned voltameter is ± 0.5%.
Further, above-mentioned flowmeter should be located at the position of water pump assembly water outlet straight tube front 6 rear 4 ratios, and water outlet length of straight pipe is 10 times of water outlet straight tube caliber.
Because the method for measurement of water pump assembly fractional energy savings after the present invention's application re-manufacturing technology has adopted technique scheme, first voltameter and flowmeter are set, measure the steady working condition based on identical or close flow velocity and arrange under rotating speed taking per unit volume power consumption as fractional energy savings index, be twice measurement of 2 hours to the water pump operation parameter cycle of carrying out, 10 minutes survey data sampling intervals; Utilize formula to calculate each water pump per unit volume power consumption of measuring, and this power consumption is modified to per unit volume power consumption under pump shaft power standard condition; The correction value phase rate of twice measurement answers≤0.5%, then get the mean value of twice measurement correction value as energy consumption reference value, adopt re-manufacturing technology to repair also continuous operation more than 30 days to water pump, duplicate measurements also calculates per unit volume power consumption under the rear pump shaft power standard condition of reparation, this power consumption is as energy consumption examination value, by pump energy consumption reference value and examination value are calculated to fractional energy savings.This method can Measurement accuracy application re-manufacturing technology after the fractional energy savings of water pump assembly, the application of re-manufacturing technology is made to accurate evaluation, be conducive to applying of re-manufacturing technology, reach the object of energy-saving and emission-reduction.
Embodiment
After the present invention's application re-manufacturing technology, the method for measurement of water pump assembly fractional energy savings comprises the steps:
The electrical power control cabinet of step 1, water pump assembly is provided for measuring the voltameter of water pump assembly power consumption, and water pump assembly outlet conduit is provided for measuring the flowmeter of delivery of pump;
Step 2, setting water pump operation are in the identical or close steady working condition of flow velocity a certain agreement rotating speed, water pump power consumption and flow, lift are relevant, under the condition remaining unchanged at lift, the power consumption of water pump is directly proportional to flow, and setting water pump assembly fractional energy savings index is per unit volume power consumption;
Step 3, water pump per unit volume power consumption is carried out to twice measurement in agreement under rotating speed, and power consumption and water displacement synchro measure, be 2 hours each measuring period, in measuring period, the main entrance pressure of water pump assembly, main entrance liquid level height, general export pressure, general export liquid level height synchro measure, 10 minutes survey data sampling intervals, and marked traffic meter measuring position, while measurement, flowmeter survey position is identical at every turn;
Step 4, each survey data of each measurement is got to arithmetic mean value, and calculates each water pump per unit volume power consumption of measuring by following formula,
In formula (1) and formula (2), H is pump head, and η is pump efficiency, and P is water pump power consumption, and Q is pump capacity, P
outletfor water pump assembly general export pressure, P
entrancefor water pump assembly main entrance pressure, h
enter oral fluid facefor water pump assembly main entrance liquid level height, e is water pump per unit volume power consumption; ρ is the density of water, and g is gravity accleration;
Per unit volume power consumption under step 5, calculating pump shaft power standard condition, revises the water pump per unit volume power consumption of each measurement, and correction factor is:
In formula (3), ζ is correction factor, P
outlet 1water pump assembly general export pressure when measuring for the first time, P
outlet 2water pump assembly general export pressure when measuring for the second time, h
entrance liquid level 1water pump assembly main entrance liquid level height when measuring for the first time, h
entrance liquid level 2water pump assembly main entrance liquid level height when measuring for the second time,
Water pump mark condition per unit volume power consumption e after revising
2for:
e
2＝e*ζ (4)
In all kinds of water pump handbooks or reference book, there is no the air horsepower reduction formula of energy saving condition ready-made, that meet re-manufacturing technology, therefore according to the efficiency curve of water pump and on-the-spot a large amount of experimental verification, water pump is efficiency approximate constant in the time that flow changes among a small circle, therefore in the time that flow changes among a small circle, can adopt the power consumption of formula (4) correction water pump under standard condition;
According to water pump curve, when pump capacity changes, pump efficiency also can change thereupon, therefore, in the time carrying out contrast test, need the changes in flow rate value that ensures comparative trial front and back water pump that too large fluctuation can not occur, generally need changes in flow rate value to be no more than 5%, had better not exceed 3%, and best near the design discharge point of water pump;
The energy consumption fluctuation causing because of water pump operation working conditions change can be effectively eliminated in the correction of water pump per unit volume power consumption, ensures the accuracy that fractional energy savings calculates;
The phase rate of step 6, the revised water pump mark of twice measurement condition per unit volume power consumption answers≤0.5%, otherwise it is invalid to measure, need to increase and measure number of times until survey data is qualified, after survey data is qualified, get the mean value of the revised water pump mark of twice measurement condition per unit volume power consumption as the energy consumption reference value of water pump under agreement rotating speed;
Step 7, adopt re-manufacturing technology to add renovation agent continuous operation more than 30 days to water pump spindle bearing, under agreement rotating speed, repeating step three, to step 6, measures after re-manufacturing technology water pump mark condition per unit volume power consumption and as energy consumption examination value;
The fractional energy savings of step 8, calculating water pump after re-manufacturing technology is repaired, setting the energy consumption reference value of water pump before repairing is e
j, repair after the energy consumption examination value of water pump be e
b, fractional energy savings ξ is:
By the be applied fractional energy savings of water pump after re-manufacturing technology of formula (5).
Further, the measuring accuracy of above-mentioned voltameter is ± 0.5%, with accurate-metering electrical power consumption of water pump.
Further, above-mentioned flowmeter should be located at the position of water pump assembly water outlet straight tube front 6 rear 4 ratios, and water outlet length of straight pipe is about the caliber of 10 times.Flowmeter should carry out flow measurement according to operating specification, can not be too near apart from water pump vane, otherwise the turbulent flow at water pump vane place can have influence on the measuring accuracy of flow.
Re-manufacturing technology does not do any transformation to water pump body and pipe network structure, therefore the per unit volume power consumption before and after the transformation of this method measurements and calculations pump energy saving correction are to identical standard condition, obtain water pump transformation front and back energy consumption reference value and energy consumption examination value, adopt the fractional energy savings after re-manufacturing technology thereby calculate water pump.
As taking a certain circulating water pump unit as example, this unit has 7 water pumps, open 4 for 3, under the condition constant at pump rotary speed, flow velocity is basicly stable, before renovation agent filling, measure water pump per unit volume power consumption twice, each measurement 2 hours, synchro measure pump entrance liquid level, exit list pressure and flow velocity.Applying step three to step 6 measurements and calculations obtain the energy consumption reference value of water pump.
Renovation agent filling, after 30 days, is carried out measurements and calculations with same method to water pump, obtains the energy consumption examination value of water pump.Utilize step 8 to calculate the fractional energy savings after water pump application re-manufacturing technology.
Through actual measurement and calculating, the standard condition value error rate of the front twice per unit volume power consumption of renovation agent filling is: (178.1178.0)/178=0.056%.
After renovation agent filling, the standard condition value error rate of twice per unit volume power consumption is: (171.32-171.06)/171.32=0.15%.
Thereby science and the accuracy of this method are jointly verified.Before and after concrete renovation agent filling, the survey data of water pump is in table 1 and table 2.
Table 1: water pump survey data before renovation agent filling
Table 2: water pump survey data after renovation agent filling (renovation agent filling time 2012.08.08)
Claims (3)
1. a method of measurement of applying water pump assembly fractional energy savings after re-manufacturing technology, is characterized in that this method comprises the steps:
The electrical power control cabinet of step 1, water pump assembly is provided for measuring the voltameter of water pump assembly power consumption, and water pump assembly outlet conduit is provided for measuring the flowmeter of delivery of pump;
Step 2, setting water pump operation are in the identical or close steady working condition of flow velocity a certain agreement rotating speed, water pump power consumption and flow, lift are relevant, under the condition remaining unchanged at lift, the power consumption of water pump is directly proportional to flow, and setting water pump assembly fractional energy savings index is per unit volume power consumption;
Step 3, water pump per unit volume power consumption is carried out to twice measurement in agreement under rotating speed, and power consumption and water displacement synchro measure, be 2 hours each measuring period, in measuring period, the main entrance pressure of water pump assembly, main entrance liquid level height, general export pressure, general export liquid level height synchro measure, 10 minutes survey data sampling intervals, and marked traffic meter measuring position, while measurement, flowmeter survey position is identical at every turn;
Step 4, each survey data of each measurement is got to arithmetic mean value, and calculates each water pump per unit volume power consumption of measuring by following formula,
In formula (1) and formula (2), H is pump head, and η is pump efficiency, and P is water pump power consumption, and Q is pump capacity, P
outletfor water pump assembly general export pressure, P
entrancefor water pump assembly main entrance pressure, h
enter oral fluid facefor water pump assembly main entrance liquid level height, e is water pump per unit volume power consumption, the density that ρ is water, and g is gravity accleration;
Per unit volume power consumption under step 5, calculating pump shaft power standard condition, revises the water pump per unit volume power consumption of each measurement, and correction factor is:
In formula (3), ζ is correction factor, P
outlet 1water pump assembly general export pressure when measuring for the first time, P
outlet 2water pump assembly general export pressure when measuring for the second time, h
entrance liquid level 1water pump assembly main entrance liquid level height when measuring for the first time, h
entrance liquid level 2water pump assembly main entrance liquid level height when measuring for the second time,
Water pump mark condition per unit volume power consumption e after revising
2for:
e
2＝e*ζ (4)
The phase rate of step 6, the revised water pump mark of twice measurement condition per unit volume power consumption answers≤0.5%, otherwise it is invalid to measure, need to increase and measure number of times until survey data is qualified, after survey data is qualified, get the mean value of the revised water pump mark of twice measurement condition per unit volume power consumption as the energy consumption reference value of water pump under agreement rotating speed;
Step 7, adopt re-manufacturing technology to add renovation agent continuous operation more than 30 days to water pump spindle bearing, under agreement rotating speed, repeating step three, to step 6, measures after re-manufacturing technology water pump mark condition per unit volume power consumption and as energy consumption examination value;
The fractional energy savings of step 8, calculating water pump after re-manufacturing technology is repaired, setting the energy consumption reference value of water pump before repairing is e
j, repair after the energy consumption examination value of water pump be e
b, fractional energy savings ξ is:
By the be applied fractional energy savings of water pump after re-manufacturing technology of formula (5).
2. the method for measurement of water pump assembly fractional energy savings after application re-manufacturing technology according to claim 1, is characterized in that: the measuring accuracy of described voltameter is ± 0.5%.
3. the method for measurement of water pump assembly fractional energy savings after application re-manufacturing technology according to claim 1 and 2, it is characterized in that: described flowmeter is located at the position of water outlet straight tube front 6 rear 4 ratios of water pump assembly, and described water outlet length of straight pipe is 10 times of water outlet straight tube caliber.
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Cited By (3)
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| CN105587655A (en) * | 2015-12-29 | 2016-05-18 | 安徽海兴泰瑞智能科技有限公司 | Method for analyzing and managing energy consumption of pump station |
| CN113484057A (en) * | 2021-07-20 | 2021-10-08 | 杭州塞博环境科技有限公司 | Method, equipment and system for calculating and evaluating energy efficiency of water treatment facility |
| CN113901603A (en) * | 2021-09-27 | 2022-01-07 | 国网江苏省电力有限公司营销服务中心 | Water pump unit energy efficiency measurement uncertainty evaluation method and device |
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| CN113901603A (en) * | 2021-09-27 | 2022-01-07 | 国网江苏省电力有限公司营销服务中心 | Water pump unit energy efficiency measurement uncertainty evaluation method and device |
| CN113901603B (en) * | 2021-09-27 | 2024-05-31 | 国网江苏省电力有限公司营销服务中心 | Method and device for evaluating uncertainty of energy efficiency measurement of water pump unit |
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Address after: No. 3520 Tongji Road, Baoshan District, Shanghai, 201900 Co-patentee after: BAOSHAN IRON & STEEL Co.,Ltd. Patentee after: Baowu equipment Intelligent Technology Co., Ltd Address before: 201900, 335, Pu Pu Road, Shanghai, Baoshan District Co-patentee before: BAOSHAN IRON & STEEL Co.,Ltd. Patentee before: SHANGHAI BAOSTEEL INDUSTRY TECHNOLOGICAL SERVICE Co.,Ltd. |