CN109754194A - Exhaust blower unit air volume wasted work rate is obtained back with the method for operation time limit evolution properties - Google Patents
Exhaust blower unit air volume wasted work rate is obtained back with the method for operation time limit evolution properties Download PDFInfo
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- CN109754194A CN109754194A CN201910103016.8A CN201910103016A CN109754194A CN 109754194 A CN109754194 A CN 109754194A CN 201910103016 A CN201910103016 A CN 201910103016A CN 109754194 A CN109754194 A CN 109754194A
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- exhaust blower
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Abstract
The present invention relates to a kind of exhaust blower unit air volume wasted work rates that obtains back with the method for operation time limit evolution properties, based on the exhaust blower detection of Environment Control System In The Metro Station scene time, different years are extracted with the method for stratified sampling and return exhaust blower actual measurement sample data, and the unreasonable parameter in field measurement is rejected using Grubbs' test method；The different operation time limits are calculated by formula and return exhaust blower unit air volume wasted work rate WsWith WsThe dough softening, final linear fit obtain back exhaust blower unit air volume wasted work rate WsWith WsThe dough softening obtains the different operation time limits by stratified sampling come inspection institute and returns exhaust blower unit air volume wasted work rate W with the Evolution for runing the time limitsAnd WsThe reliability of attenuation curve rule.Method of the invention can obtain subway station and return exhaust blower unit air volume wasted work rate WsWith the dynamic rule of the operation time limit, exhaust blower overhaul is returned for Environment Control System In The Metro Station and replacement provides reference frame.
Description
Technical field
The present invention relates to a kind of subways to return exhaust blower efficiency with the evaluation method of time limit variation characteristic, and in particular to one kind obtains
It obtains Environment Control System In The Metro Station and returns exhaust blower unit air volume wasted work rate with the method for operation time limit evolution properties.
Background technique
In the case where based on subway station thermal environment parameter change in long term, obtain main in Environment Control System In The Metro Station and system
The performance rule of equipment is wanted, to provide the performance parameter range in the case of subway returns exhaust blower operational safety, to be subway
Ring control New Products access, equipment and the system burst problem quick diagnosis of standing and subway station ring control operation maintenance management with
The standard of equipment rebuilding replacement assessment provides reference, to reach the section of the sustainable development of subway station thermal environment and device systems
Demand can comfortably be runed.Therefore, it is necessary to a kind of acquisition Environment Control System In The Metro Stations to return exhaust blower unit air volume wasted work rate with operation
The method of time limit evolution properties, it is preferred that emphasis is return this single devices of exhaust blower in different fortune in Environment Control System In The Metro Station
Seek the property evolution rule under the time limit.Return power main source one of of the exhaust blower as Environmental Control System of Metro wind system, cooperation
Air-conditioning box carries out quality exchange to Stations, it is necessary to which in type selecting and operation, targeted index carries out standard operation to it
And management.
Summary of the invention
The property evolution characteristic that exhaust blower is returned it is an object of the invention to probe into Environment Control System In The Metro Station, obtains back air draft
Performance parameter range in the case of machine operational safety is subway station ring control New Products access, equipment and system burst
The standard offer reference of problem quick diagnosis and subway environment operation maintenance management and time exhaust blower equipment rebuilding replacement assessment, and
There is provided it is a kind of acquisition Environment Control System In The Metro Station return exhaust blower unit air volume wasted work rate with operation time limit evolution properties method.
To achieve the above object, the invention provides the following technical scheme: a kind of obtain back exhaust blower unit air volume wasted work rate
With the method for operation time limit evolution properties, have step are as follows: firstly, under based on the actual measurement to subway station air-conditioning system, over the ground
Iron car station environmental control system returns exhaust blower unit air volume wasted work rate and carries out evaluation from operation this angle of the time limit, with stratified sampling
The station operation time limit is divided into initial stage, mid-term and long term to extract its time exhaust blower unit air volume wasted work rate W by methods, and adopt
Tested with Grubbs' test method to it, then according to declared working condition next time exhaust blower unit air volume wasted work rate and actual measurement work
Exhaust blower unit air volume wasted work rate of returning under condition obtains the dough softening of different years exhaust blower unit air volume wasted work rate next time, again
Data rejecting is carried out to it using Grubbs' test method, exhaust blower unit air volume wasted work rate and list are obtained back by linear fit
Position air quantity wasted work rate dough softening evolution curve, and fitting reliability is examined using stratified sampling, finally obtain back exhaust blower unit
Air quantity wasted work rate with operation the time limit variation and attenuation characteristic method.
Further, the exhaust blower unit air volume wasted work rate that obtains back is with the variation of the operation time limit and the side of attenuation characteristic
Method, comprising the following specific steps
Step 1: using stratified sampling method, the station operation time limit is divided into initial stage, mid-term and long term, from numerous subways
Extracted in station and respectively represent the above period and with the typical route for returning exhaust blower operating parameter feature and station, to it is different when
The exhaust blower that returns of phase is surveyed respectively；
Step 2: the wind speed and area in exhaust blower air port, the input power of blower be can get back by surveying, and then calculated
Blowing machine unit air volume wasted work rate, and tested by Grubbs' test method to it；
Step 3: according to time exhaust blower list of different years under the blower unit air volume wasted work rate and actual measurement operating condition on nameplate
The dough softening of different operation time limits exhaust blower unit air volume wasted work rates next time is calculated in position air quantity wasted work rate；
Step 4: each operation time limit after being examined is whole next time after exhaust blower unit air volume wasted work rate and its dough softening
It manages and passes through linear fit and obtain the different operation time limits time exhaust blower unit air volume wasted work rate WsAnd return exhaust blower unit air volume consumption
Power WsAttenuation curve, and tested by reliability of the stratified sampling to curve obtained, finally obtain back exhaust blower unit
Air quantity wasted work rate is with the variation and attenuation characteristic for runing the time limit.
Further, the division in initial stage, mid-term and long term with 3-5 be a time phase, and each time phase rise
The beginning time limit then needs to determine referring to the local subway station actual operation time limit.
Further use back exhaust blower unit air volume wasted work rate WsEvaluate the performance of different years exhaust blower next time, due to
Return exhaust blower unit air volume wasted work rate WsIt is small with time limit variation, and as the operation time limit increases, do not have apparent attenuation characteristic.
Further, it returns the exhaust blower unit air volume wasted work rate dough softening and specifically calculates and see formula 1.1,
In formula:
The S- Energy Efficiency Ratio dough softening；
WsExhaust blower unit air volume wasted work rate is returned under '-declared working condition；
WsIt surveys and returns exhaust blower unit air volume wasted work rate under operating condition；
In order to guarantee the accuracy of data, abnormal data erasing is carried out to data result, uses Grubbs' test method pair again
Exhaust blower unit air volume wasted work rate W is returned in effective station of each period of actual measurementsAnd its dough softening bad value is rejected.
Further, the period surveyed to subway station air-conditioning system is selected in the air-conditioning season of the summer hotter moon.
Further, Environment Control System In The Metro Station returns exhaust blower and is both needed to carry out normal device maintenance in the long-term use,
And do not carried out overhaul and replacement.
The beneficial effects of the present invention are:
The present invention by from operation the time limit angle be unfolded, to Environmental Control System of Metro return exhaust blower unit air volume wasted work rate into
Row layering actual measurement, data detection, linear fit finally obtain and return evolution of the exhaust blower under different years in Environmental Control System of Metro
Rule, to provide back the performance parameter range in the case of exhaust blower operational safety, to be the type Environment Control System In The Metro Station
It returns exhaust blower new product access and bursting problem quick diagnosis and Environmental Control System of Metro returns exhaust blower operation maintenance management and overhaul
The standard of replacement assessment provides reference, is needed with reaching Subway Thermal Environment and the comfortable operation of energy conservation for the sustainable development for returning exhaust blower
It asks.
Detailed description of the invention
Fig. 1 is back exhaust blower unit air volume wasted work rate trend chart；
Fig. 2 is back exhaust blower unit air volume wasted work rate dough softening trend chart.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
It is a kind of obtain Environment Control System In The Metro Station return exhaust blower unit air volume wasted work rate with operation time limit evolution properties side
Method has step are as follows: firstly, returning exhaust blower to Environment Control System In The Metro Station under based on the actual measurement to subway station air-conditioning system
Unit air volume wasted work rate carries out evaluation from operation this angle of the time limit, divides the station operation time limit with the method for stratified sampling
Its time exhaust blower unit air volume wasted work rate W is extracted for initial stage, mid-term and long terms, and using Grubbs' test method to its into
Then performing check returns exhaust blower unit air volume according under declared working condition next time exhaust blower unit air volume wasted work rate and actual measurement operating condition
Wasted work rate obtains the dough softening of different years exhaust blower unit air volume wasted work rate next time, again using Grubbs' test method to it
Data rejecting is carried out, exhaust blower unit air volume wasted work rate is obtained back by linear fit and the unit air volume wasted work rate dough softening develops
Curve, and fitting reliability is examined using stratified sampling, exhaust blower unit air volume wasted work rate is finally obtained back with the operation time limit
The method of variation and attenuation characteristic.
The invention obtains back exhaust blower unit air volume wasted work rate with the variation of the operation time limit and the specific steps of attenuation characteristic
Include:
Step 1: using stratified sampling method, the station operation time limit is divided into initial stage, mid-term and long term, from numerous subways
Extracted in station and respectively represent the above period and with the typical route for returning exhaust blower operating parameter feature and station, to it is different when
The exhaust blower that returns of phase is surveyed respectively.
Step 2: the wind speed and area in exhaust blower air port, the input power of blower be can get back by surveying, and then calculated
Blowing machine unit air volume wasted work rate, and tested by Grubbs' test method to it.
Step 3: according to time exhaust blower list of different years under the blower unit air volume wasted work rate and actual measurement operating condition on nameplate
The dough softening of different operation time limits exhaust blower unit air volume wasted work rates next time is calculated in position air quantity wasted work rate.
Step 4: each operation time limit after being examined is whole next time after exhaust blower unit air volume wasted work rate and its dough softening
It manages and passes through linear fit and obtain the different operation time limits time exhaust blower unit air volume wasted work rate WsAnd WsAttenuation curve, and by dividing
Layer sampling tests to the reliability of curve obtained, finally obtains back exhaust blower unit air volume wasted work rate with the change of the operation time limit
Change and attenuation characteristic.
Since subway station sample size is excessive, need to extract in numerous subway stations with typical water pump operation parameter attribute
Initial stage, mid-term and station at a specified future date.The division at initial stage, mid-term and long term with 3-5 for a time phase, and each time rank
The starting time limit of section then needs to determine referring to the local subway station actual operation time limit.
Different years next time exhaust blower performance evaluation mainly by return exhaust blower unit air volume wasted work rate WsIt embodies, the row of returning
Blower unit air volume wasted work rate WsIt is smaller with time limit variation, and as the operation time limit increases, do not have apparent attenuation characteristic.
It returns the exhaust blower unit air volume wasted work rate dough softening and specifically calculates and see formula 1.1.
In formula:
The S- Energy Efficiency Ratio dough softening
WsExhaust blower unit air volume wasted work rate is returned under '-declared working condition；
WsIt surveys and returns exhaust blower unit air volume wasted work rate under operating condition；
In order to guarantee the accuracy of data, need to carry out abnormal data erasing to data result, thus again using croup this
Method of inspection returns exhaust blower unit air volume wasted work rate W in effective station of each period of actual measurementsAnd its dough softening bad value is picked
It removes.
Air-conditioning season of the period multiselect of field measurement in the summer hotter moon.
Environment Control System In The Metro Station return exhaust blower be both needed in the long-term use carry out normal device maintenance, and not into
Went overhaul and replacement.
Embodiment:
Statistics is investigated to Shanghai Underground ring control relevant device operation status first, by inquiry and is counted, by Shanghai
Subway station by operation the time limit be divided into initial stage (in August, 2013 in August, -2017), mid-term (in August, 2009 in August, -2013) and
(in August, 2005 in August, -2009) at a specified future date, and each route underground station of Shanghai Underground is counted, it is shown in Table 1, i.e. 191 ground
Debarkation stop is the sample size studied herein.
1 Shanghai Underground of table underground station quantity statistics after 2005
| Run time | Initial stage | Mid-term | It is at a specified future date |
| Quantity (a) | 62 | 74 | 55 |
Initial stage 7 stations, mid-term 4 stations, 7 stations at a specified future date are selected with the method for stratified sampling.Then it is examined according to national blower
Mark standard is come to the air quantity for returning exhaust blower, and blower input power is tested.
Measured data rejects bad value by Grubbs' test method, then calculates back exhaust blower unit air volume wasted work
Rate and the wasted work rate dough softening need to carry out abnormal data erasing to data calculated result, therefore again to guarantee the accuracy of result
Using Grubbs' test method in effective station of each period return exhaust blower unit air volume wasted work rate and the wasted work rate dough softening it is bad
Value is rejected.
According to abnormal data erasing as a result, returning exhaust blower unit air volume wasted work rate initial stage average value is 0.28W/ (m3/ h), mid-term
For 0.26W/ (m3/ h), long term is 0.09W/ (m3/ h), it sees on the whole, each period station returns exhaust blower unit air volume and consumes power number
Value meets reference standard requirement, returns exhaust blower unit air volume wasted work rate trend chart and wasted work rate dough softening figure is shown in Fig. 1 and figure
2。
Returning run time exhaust blower unit air volume wasted work rate hardly follows has linear relationship, is primarily due to back exhaust blower
Although unit air volume wasted work rate has certain variation relation in each period, exhaust blower rated value of respectively standing back is different, obtains
Efficiency ratios it is also just different.It is higher to run 7 years station rated efficiencies, and 10 years station rated efficiencies are relatively low, lead to back air draft
The machine unit air volume wasted work rate dough softening does not have linear relationship, and matched curve is invalid.
Based on the present invention returns exhaust blower detection by scene, different years are extracted with the method for stratified sampling and return exhaust blower
Sample data is surveyed, and the unreasonable parameter in field measurement is rejected using Grubbs' test method；It is calculated by formula
The difference operation time limit returns exhaust blower unit air volume wasted work rate WsWith WsThe dough softening, final linear fit obtain back exhaust blower unit wind
Measure wasted work rate WsWith WsThe dough softening and obtains the different operation time limits by stratified sampling with the Evolution of the operation time limit come inspection institute
Return exhaust blower unit air volume wasted work rate WsAnd WsThe reliability of attenuation curve rule.The method of the present invention can obtain subway station and return row
Blower unit air volume wasted work rate WsWith operation the time limit dynamic rule, for Environment Control System In The Metro Station return exhaust blower overhaul and
Replacement provides reference frame.
Claims (7)
1. a kind of exhaust blower unit air volume wasted work rate that obtains back is with the method for operation time limit evolution properties, it is characterised in that: firstly,
Under based on the actual measurement to subway station air-conditioning system, exhaust blower unit air volume wasted work rate is returned from fortune to Environment Control System In The Metro Station
It seeks this angle of the time limit and carries out evaluation, the station operation time limit is divided into initial stage, mid-term and long term with the method for stratified sampling
To extract its time exhaust blower unit air volume wasted work rate Ws, and tested using Grubbs' test method to it, then according to volume
Determining operating condition, exhaust blower unit air volume wasted work rate and the exhaust blower unit air volume wasted work rate of returning surveyed under operating condition obtain not the same year next time
The dough softening of exhaust blower unit air volume wasted work rate next time is limited, data rejecting is carried out to it using Grubbs' test method again, is led to
It crosses linear fit and obtains back exhaust blower unit air volume wasted work rate and unit air volume wasted work rate dough softening evolution curve, and using layering
Sampling inspection is fitted reliability, finally obtains back exhaust blower unit air volume wasted work rate with the variation and attenuation characteristic for runing the time limit
Method.
2. it is according to claim 1 obtain back exhaust blower unit air volume wasted work rate with operation time limit evolution properties method,
It is characterized by: the exhaust blower unit air volume wasted work rate that obtains back is with the method for the variation and attenuation characteristic for runing the time limit, packet
Include step in detail below:
Step 1: using stratified sampling method, the station operation time limit is divided into initial stage, mid-term and long term, from numerous subway stations
Middle extraction respectively represents the above period and with the typical route for returning exhaust blower operating parameter feature and station, to different times
Exhaust blower is returned to survey respectively；
Step 2: the wind speed and area in exhaust blower air port, the input power of blower be can get back by surveying, and then calculate outlet air
Machine unit air volume wasted work rate, and tested by Grubbs' test method to it；
Step 3: according to time exhaust blower unit wind of different years under the blower unit air volume wasted work rate and actual measurement operating condition on nameplate
Wasted work rate is measured, the dough softening of different operation time limits exhaust blower unit air volume wasted work rates next time is calculated；
Step 4: each operation time limit after being examined after exhaust blower unit air volume wasted work rate and its dough softening, arranges simultaneously next time
The different operation time limits, which are obtained, by linear fit returns exhaust blower unit air volume wasted work rate WsAnd return exhaust blower unit air volume wasted work rate Ws
Attenuation curve, and tested by reliability of the stratified sampling to curve obtained, finally obtain back exhaust blower unit air volume consumption
Power is with the variation and attenuation characteristic for runing the time limit.
3. the exhaust blower unit air volume wasted work rate according to claim 1 or 2 that obtains back is with the side of operation time limit evolution properties
Method, it is characterised in that: the division at the initial stage, mid-term and long term with 3-5 for time phase, and each time phase
The starting time limit then needs to determine referring to the local subway station actual operation time limit.
4. the exhaust blower unit air volume wasted work rate according to claim 1 or 2 that obtains back is with the side of operation time limit evolution properties
Method, it is characterised in that: use back exhaust blower unit air volume wasted work rate WsEvaluate the performance of different years exhaust blower next time, due to
Return exhaust blower unit air volume wasted work rate WsIt is small with time limit variation, and as the operation time limit increases, do not have apparent attenuation characteristic.
5. the exhaust blower unit air volume wasted work rate according to claim 1 or 2 that obtains back is with the side of operation time limit evolution properties
Method, it is characterised in that: it returns the exhaust blower unit air volume wasted work rate dough softening and specifically calculates and see formula 1.1,
In formula:
The S- Energy Efficiency Ratio dough softening；
WsExhaust blower unit air volume wasted work rate is returned under '-declared working condition；
WsIt surveys and returns exhaust blower unit air volume wasted work rate under operating condition；
In order to guarantee the accuracy of data, abnormal data erasing is carried out to data result, again using Grubbs' test method to actual measurement
Effective station of each period in return exhaust blower unit air volume wasted work rate WsAnd its dough softening bad value is rejected.
6. it is according to claim 1 obtain back exhaust blower unit air volume wasted work rate with operation time limit evolution properties method,
It is characterized by: the period surveyed to subway station air-conditioning system is selected in the air-conditioning season of the summer hotter moon.
7. it is according to claim 1 obtain back exhaust blower unit air volume wasted work rate with operation time limit evolution properties method,
It is both needed to carry out normal device maintenance in the long-term use it is characterized by: Environment Control System In The Metro Station returns exhaust blower, and does not have
Carried out overhaul and replacement.
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| CN201910103016.8A CN109754194A (en) | 2019-02-01 | 2019-02-01 | Exhaust blower unit air volume wasted work rate is obtained back with the method for operation time limit evolution properties |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117575223A (en) * | 2023-11-14 | 2024-02-20 | 湖北三峰透平装备股份有限公司 | Subway fan type selection method and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103856775A (en) * | 2014-03-18 | 2014-06-11 | 天津大学 | Processing method for subjective evaluation result of stereo video quality |
| CN104200089A (en) * | 2014-08-27 | 2014-12-10 | 北京市环境保护监测中心 | Method for measuring air pollutant emission amount of coal burned at bungalows |
| CN106532762A (en) * | 2015-09-14 | 2017-03-22 | 南京理工大学 | DC probabilistic load flow method for classification processing of load and wind speed correlation |
| CN107862338A (en) * | 2017-11-11 | 2018-03-30 | 福建四创软件有限公司 | Marine environmental monitoring data quality management method and system based on double check method |
-
2019
- 2019-02-01 CN CN201910103016.8A patent/CN109754194A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103856775A (en) * | 2014-03-18 | 2014-06-11 | 天津大学 | Processing method for subjective evaluation result of stereo video quality |
| CN104200089A (en) * | 2014-08-27 | 2014-12-10 | 北京市环境保护监测中心 | Method for measuring air pollutant emission amount of coal burned at bungalows |
| CN106532762A (en) * | 2015-09-14 | 2017-03-22 | 南京理工大学 | DC probabilistic load flow method for classification processing of load and wind speed correlation |
| CN107862338A (en) * | 2017-11-11 | 2018-03-30 | 福建四创软件有限公司 | Marine environmental monitoring data quality management method and system based on double check method |
Non-Patent Citations (1)
| Title |
|---|
| 电气工程师: "科普|光伏组件衰减率定义与计算公式", 《搜狐网》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117575223A (en) * | 2023-11-14 | 2024-02-20 | 湖北三峰透平装备股份有限公司 | Subway fan type selection method and device |
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