CN108871821A - Based on mean value-moving range method air cooler energy efficiency state method of real-time - Google Patents
Based on mean value-moving range method air cooler energy efficiency state method of real-time Download PDFInfo
- Publication number
- CN108871821A CN108871821A CN201810218100.XA CN201810218100A CN108871821A CN 108871821 A CN108871821 A CN 108871821A CN 201810218100 A CN201810218100 A CN 201810218100A CN 108871821 A CN108871821 A CN 108871821A
- Authority
- CN
- China
- Prior art keywords
- air cooler
- temperature
- air
- energy efficiency
- data
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
It is a kind of based on mean value-moving range method air cooler energy efficiency state method of real-time：Measuring point is chosen, respectively the various detecting sensors of clipping room；Wireless data transmitter is built, is transmitted to wireless data receiver end using the method for wireless communication with the measured value of sensor for will test；Wireless data receiver is built, for receiving storing measurement data and communicating with mobile PC, wireless data receiver can receive the data that more than one wireless data transmitter is emitted；On-line monitoring system platform is built, actual measurement Energy Efficiency Ratio is converted to obtain Energy Efficiency Ratio under the status of criterion, and export the real-time dynamic waveform figure of the thermic load of air cooler, heat transfer coefficient, motor power consumption and Energy Efficiency Ratio；It draws air cooler efficiency and measures monodrome point diagram；Air cooler Energy Efficiency Analysis is carried out according to the daily efficiency measurement monodrome point diagram of air cooler.The present invention passes through the data obtained in real time, and draws air cooler efficiency measurement monodrome point diagram, can be with the operating status of more intuitive simple judgement air cooler.
Description
Technical field
The present invention relates to a kind of air cooler energy efficiency state method of real-time.Mean value-movement is based on more particularly to one kind
The air cooler energy efficiency state method of real-time of range method.
Background technique
Strategic, infrastructural industries of the petrochemical industry as China, associated forms a complete industrial chain,
The development of large quantities of industries has been driven, it is closely bound up with the national economic development.Petrochemical industry is also a highly energy-consuming simultaneously
Industry, improvement a little small can all bring huge economic benefit in any production process.Relative to traditional industry water cooling system
System, air cooler have many features：There is no thermal pollution and chemical contamination air that can arbitrarily obtain environment；It is not required to any ancillary equipment
And expense；It chooses a site for building a factory unrestricted, does not need to consider water resources problem as water cooling；Atmospheric corrosion is small, do not need scale removal and
The features such as cleaning, long service life.
Other than advantage, problem is also than more prominent, since the fluid inside heat exchanger tube is high temperature crude oil hot steam, crude oil
In because having a S, the presence of the elements such as N, Cl, condensation process, which may form ammonium salt crystallization on fin inside pipe wall and generate fouling, to be showed
As even generating line clogging phenomenon when serious；The influence of the solid particle or dust of atmosphere outside leads to fin surface
Scale formation；Design is lost due to finned tube bending deformation caused under conditions of pipeline built-in thermal stress or environmental stress
When cooling capacity the problems such as.These all can safety to air cooler, energy-saving run constitute a threat to, directly influence normal production
With benefit.Therefore how is being carried out by evaluation with the operational energy efficiency of air cooler and examine in early days to potential faults for refinery device
It is disconnected, it is of great significance to guarantee that device normal operation provides guiding opinion.
Only have part air cooler to have flow monitoring to medium in pipe at this stage, substantially without temperature monitoring, air side is even more
There is no any monitoring device.Therefore, do not have the condition of real-time monitoring air cooler efficiency.Up to the present, for large-scale petroleum
There are no the system and method for complete set for chemical plant installations air cooler efficiency monitoring running state.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of data by obtaining in real time, and draw air cooler energy
Effect measurement monodrome point diagram, can be with the operating status of more intuitive simple judgement air cooler based on mean value-moving range method sky
Cooler energy efficiency state method of real-time.
The technical scheme adopted by the invention is that：It is a kind of real-time based on mean value-moving range method air cooler energy efficiency state
Monitoring method includes the following steps：
1) choose measuring point, respectively install indirect type wall temperature sensor, pressure/flow sensor, electric power measurement instrument with
And direct-type air velocity/temperature sensor.
2) wireless data transmitter is built, for surveying indirect wall type temperature sensor measurement value, pressure/flow sensor
Magnitude, direct-type air velocity/temperature sensor measurement value, electric power measurement instrument measurements are passed using the method for wireless communication
Transport to wireless data receiver end；
3) build wireless data receiver, for receive storage temperature, pressure, flow, speed and power data and with shifting
Dynamic PC communication, the wireless data receiver can receive the data that more than one wireless data transmitter is emitted, from
And realize the function that more air coolers are tested together.
4) on-line monitoring system platform is built, real-time data base, data analysis including foundation are looked into performance calculating, data
Inquire about display, actual measurement Energy Efficiency Ratio converted to obtain Energy Efficiency Ratio under the status of criterion, and export the thermic load of air cooler, heat transfer coefficient,
The real-time dynamic waveform figure of motor power consumption and Energy Efficiency Ratio.
5) it draws air cooler efficiency and measures monodrome point diagram, after obtaining real-time Energy Efficiency Ratio data, according to GB/T4091-
2001《Shewhart control chart》Relevant regulations, using mean value -- moving range method draws the list for judging air cooler performance efficiency
It is worth point diagram；
6) air cooler Energy Efficiency Analysis is carried out according to the daily efficiency measurement monodrome point diagram of air cooler.
In step 1),
(1) the indirect type wall temperature sensor described in is mounted on away from the nearest pipeline of air cooler and far from connector and elbow
Position, to guarantee measurement accuracy.Measurement point preferentially chooses vertical pipeline, to reduce the influence that fixed gas measures temperature；
Indirect type wall temperature sensor is installed, bolt is tightened, confirmation indirect type wall temperature sensor is close to tube wall；If pipeline exists
Insulating layer after removing insulating layer installation indirect type wall temperature sensor, restores insulating layer, and compensation lead of thermocouple plug, which passes through, to be protected
Warm layer；Indirect type wall temperature sensor is mounted on tube wall for a long time, provides convenience for the work of later temperature test；
One air cooler pipe laterally has 2 temperature measuring points, and each temperature measuring point is equipped with one group of indirect type wall temperature sensor, and one group
Indirect type wall temperature sensor includes that 4 T-type thermocouples are respectively a1~a4.
(2) pressure/flow sensor described in, is mounted on the intake header or outlet header of air cooler；
(3) direct-type air velocity/temperature sensor described in, is separately mounted at the air ports of air cooler,
In,
Rectangle air port section uses small rectangular centre point mensuration, air port section is divided into several rectangles, X-type hot line is visited
Head is arranged in rectangular centre, for measuring the central point wind speed and temperature, then calculates central point wind speed and temperature algebra is flat
Mean value；The side length of the rectangle is 300~500mm, and tube bank width is smaller, and the corresponding division of the side length of rectangle is smaller；
Round air port section uses equal-area method, the annulus for 5 concentric circles that air port section is divided into, with concentric circles
The center of circle is coordinate origin, does cross sectional coordinate, i.e. abscissa and ordinate, and each annulus and cross sectional coordinate axis have 4 intersection points,
5 annulus share 20 intersection points, and 20 intersection points are measuring point, install direct-type air velocity/temperature sensor, each annulus
The radius r of measuring pointiIt is calculated with following formula：
D in formulaiFor air duct internal diameter, unit m；I is the serial number of Middle Ring Line or test point annulus, i=1~5；riFor test point
Annular radii, unit m；
(4) the electric power measurement instrument described in, be mounted on driving fan for air cooler motor circuit on, specifically according to
The installation method of selected electric power measurement instrument is installed.
Wireless data transmitter is built described in step 2), an air cooler is tested and needs a wireless data transmitter,
Collector channel is 40, and 8 thermocouples that two groups of indirect type wall temperature sensors include are respectively connected to the transmitting of wireless temperature data
Device receives temperature data by wireless data receiver；Several X that one group of direct-type air velocity/temperature sensor includes
Type hot line probe is respectively connected to wireless data transmitter, receives speed, temperature data by wireless data receiver.
Wireless data receiver described in step 3) receives the temperature for 8 thermocouples that two groups of indirect type wall temperature sensors include
Degree evidence, when temperature acquisition is normal, start recording valid data, the record time is 10 minutes；Record starts to measure air cooler
Time and end time of measuring；It saves and measures temperature data in the effective time of measuring of air cooler, passed by each indirect type wall temperature
4 thermocouple measurement arithmetic mean of instantaneous values in sensor respectively obtain air cooler tube side inlet temperature T ', tube side outlet T "；
The wireless data receiver receives several X-types that one group of direct-type air velocity/temperature sensor includes
Hot line probe acquire respectively speed, temperature data；When data acquisition is normal, start recording valid data, the record time is 10
Minute；Record starts to measure the air cooler time and terminates time of measuring；Measurement data in the effective time of measuring of air cooler is saved, is led to
The X-type hot line probe measurement arithmetic mean of instantaneous value in each direct-type air velocity/temperature sensor is crossed, air cooler sky is respectively obtained
Gas side inlet temperature t1, outlet temperature t2, inlet velocity u ', muzzle velocity u ".
On-line monitoring system platform is built described in step 4), including：
(1) real-time data base is established
Establish real-time data base, including store by wireless data receiver be transmitted to computer real time temperature detection data,
Real-time wind speed/temperature detection data, realtime power detection data, the ginseng such as flow, machining load of related tube side extracted from DCS
The deposit real-time data base such as number, medium physical property, medium enthalpy at each temperature, the structural parameters of air cooler and heat exchange area.
(2) performance of online air cooler calculates, i.e. the calculating of the overall heat-transfer coefficient and Energy Efficiency Ratio of air cooler：
The total heat exchange amount of air cooler calculates：
Q=Wo·Cp(t2-t1)
In formula：Q is the total heat exchange amount of air cooler；WoFor the mass flow (kg/s) of air side；CpFor air specific heat capacity (J/
(kg·℃))；t1, t2For the out temperature (DEG C) of air.
The mass flow calculation of air cooler air side：
Wo=3600AF·UF·ρ
In formula：AFFor air duct sectional area (m2)；UFFor air velocity (m/s)；ρ is atmospheric density (kg/m3)。
Air cooler Average heat transfer differential thermal calculation：
If △ T1/△T2>When 1.7, △ Tm=(△ T1-△T2)/ln(△T1/△T2)；
If △ T1/△T2When≤1.7, △ Tm=(△ T1+△T2)/2
Wherein △ T1=T '-t2, △ T2=t2-t1
△ Tm is air cooler heat transfer temperature difference in formula；T ' is pipe side-entrance temperature DEG C；T " is pipe side outlet temperature DEG C；t1For sky
Gas inlet temperature DEG C；t2For air exit temp DEG C；Ln is natural logrithm.
Air cooler overall heat-transfer coefficient：
K=Q/A △ Tm
In formula：K is the overall heat-transfer coefficient (W/m of air cooler2·℃)；A is the heat exchange area (m of air cooler2)。
Energy Efficiency Ratio (EER) calculates：
In view of four seasons temperature is different, operational efficiency of the same air cooler under different working conditions is also different, therefore
Operational energy efficiency under different operating conditions is converted into the efficiency under standard condition, i.e. the total heat exchange amount of air cooler and fan electromotor is being marked
The ratio of electric power input value under quasi- air regime,
Standard air situation refers to：Density p0=1.05kg/m3；Pressure P0=101325Pa；t0=20 DEG C；
If air cooler air quantity cannot automatically adjust, fan electromotor consumption power is inversely proportional with air inlet absolute temperature,
Fan electromotor consumes power and increases, the motor power (output) under same thermic load standard air air inlet operating condition as temperature reduces
Consume NStandardThe air cooler motor power (output) consumption N obtained with electric power measurement apparatus measuresActual measurementThe following formula of relationship obtain：
If air cooler air quantity can automatically adjust, the blower for adjusting air quantity has turn angle fan and adjustable speed fan, same thermic load
Motor power (output) under standard air air inlet operating condition consumes NStandardThe air cooler motor function obtained with electric power measurement apparatus measures
Rate consumes NActual measurementThe following formula of relationship obtain：
Turn angle fan：
Adjustable speed fan：
In formula：NActual measurementFor the air cooler motor power (output) consumption that electric power measurement apparatus measures obtain, unit W；NStandardIt is same
Etc. motor power (output) consumption under thermic loads standard air air inlet operating condition, unit W, x are what air quantity was automatically adjusted with temperature change
Relative power, it is specific as follows：
When temperature is -15 DEG C, angle modulation relative power is 40.0%, and speed regulation relative power is 22.0%；
When temperature is -10 DEG C, angle modulation relative power is 32.0%, and speed regulation relative power is 10.0%；
When temperature is -5 DEG C, angle modulation relative power is 18.0%, and speed regulation relative power is 4.5%；
When temperature is 0 DEG C, angle modulation relative power is 15.0%, and speed regulation relative power is 1.5%；
When temperature is 5 DEG C, angle modulation relative power is 16.0%, and speed regulation relative power is 2.5%；
When temperature is 10 DEG C, angle modulation relative power is 18.0%, and speed regulation relative power is 8.5%；
When temperature is 15 DEG C, angle modulation relative power is 21.50%, and speed regulation relative power is 12.5%；
When temperature is 20 DEG C, angle modulation relative power is 31.5%, and speed regulation relative power is 25.0%；
When temperature is 25 DEG C, angle modulation relative power is 48.0%, and speed regulation relative power is 42.0%；
When temperature is 30 DEG C, angle modulation relative power is 66.0%, and speed regulation relative power is 66.0%；
When temperature is 35 DEG C, angle modulation relative power is 100.0%, and speed regulation relative power is 100.0%；
The trapped energy theory of air cooler：
EER=Q/NStandard
Wherein, Q is the total heat exchange amount of air cooler.
Step 5) includes：
To determine the actual operating state for being evaluated air cooler, the base measured under the operating condition that air cooler need to be selected to operate normally
Plinth data include temperature, pressure, flow, speed and power data, calculate Energy Efficiency RatioDetermine the efficiency of accidental conditions
It is the daily efficiency detection of next step air cooler than the position of EER upper control line UCL and lower control line LCL and exception control line YCL
The foundation of offer, it is contemplated that a possibility that field conduct, basic data measuring phases are quasi- to carry out i batch, i=5-10, every batch of n
A data, n are the integer more than or equal to 2；Nominal situation operates normally in one month after referring generally to general overhaul.
(1) average value of trapped energy theory is calculatedWith trapped energy theory moving range mean value
To average valueWith moving range mean valueIt is calculated, is obtained by following formula：
EERi=(EERi1+EERi2)/2(EERiFor 2 mean values of replication)；
In formula:EERiFor i-th of detected value；RSiFor i-th of moving range；N is detection batch；
(2) determination of control limit is operated normally
According to the regulation in GB/T 4091-2001 shewhart control chart, every batch of duplicate measurements 2 times：
For EER：
(3) determination of misoperation control limit
For EER：
(4) measurement of the basic data of 5-10 batch, including temperature, pressure are carried out under air cooler accidental conditions
Power, flow, speed and power data calculate separately out trapped energy theory and each batch to 2 groups of data of every batch of measurement
Average value EERiAnd the average value of 5-10 batchTo measure batch as abscissa, trapped energy theory is ordinate, often
A batch Energy Efficiency Ratio average value EERiIt puts on the vertical line of this batch respectively, to obtain the list of reflection air cooler efficiency variation
It is worth point diagram, according toDetermine the upper control line UCL of accidental conditions, the position of lower control line LCL and exception control line YCL
It sets, draws out air cooler efficiency and operate normally control limit line chart, air cooler efficiency is operated normally into control limit line chart, is divided into
The area A, the area B, the area C, wherein region of the area A between upper control line UCL and lower control line LCL is normal operating zone；The area B is
Region between lower control line LCL and exception control line YCL, is focused on the area of concern domain；The area C is that exception control line YCL is below
Region is abnormal area, in this, as the foundation of the daily actual motion efficiency detection of air cooler.
The daily Energy Efficiency Analysis of air cooler described in step 6) is using dot map analysis method, is passed through to day-to-day operation air cooler
Operation data detection includes that temperature, pressure, flow, speed and power data calculate actual motion trapped energy theory, by Energy Efficiency Ratio
EER control air cooler efficiency, which operates normally control limit line chart, can then carry out Energy Efficiency Analysis, and concrete analysis standard is：
(1) actual motion trapped energy theory is located at the area A, without departing from the range for operating normally upper lower control limit, illustrates the sky
Cooler operation conditions is normal, this equipment is normal use.
(2) actual motion trapped energy theory is located at the area B, lower than lower control limit is operated normally, is higher than misoperation and controls boundary
Limit is improved empty under the premise of meeting technique production requirement in terms of adjusting process parameter, the reasonable process condition of selection
The operating status of cooler improves Energy Efficiency Ratio, and adjusted rear air cooler runs practical Energy Efficiency Ratio and returns to normal, then the air cooler continues
Operation；If still run on the area B after adjusted, then increase the frequency of efficiency detection, it is proposed that be monthly 1 time.
(3) actual motion trapped energy theory is located at the area C, is lower than misoperation control limit, need to carry out ammonium salt crystallization possibility
And injection point position analysis eliminates heat-exchanging tube bundle blocking and perforation failure using Infrared Detection Method and related lossless detection method
Possibility, the operating status of adjusting process parameter improvement air cooler, improve Energy Efficiency Ratio；Air cooler runs practical efficiency after adjusted
Than returning to normal, then the air cooler continues to run；If run on the area B after adjusted, then the frequency for increasing efficiency detection is needed, it is proposed that
It is monthly 1 time；It is built when air cooler shell-side outlet temperature meets requirement of actual working condition as adjusted rear air cooler still runs on the area C
View reinforces the energy efficiency monitoring of the air cooler by using energy efficiency monitoring frequency or the online energy efficiency monitoring system of installation is such as increased, after
Reforwarding row；If still cannot meet the technological requirements, it is proposed that cut standby platform and place under repair.
It is of the invention based on mean value-moving range method air cooler energy efficiency state method of real-time, by obtaining in real time
Data, and draw air cooler efficiency measurement monodrome point diagram, can with it is more intuitive it is simple judgement air cooler operating status, can
It is taken timely measure when something goes wrong in air cooler.Specifically have the following advantages that：
1, parking installation temperature measuring equipment is not needed, does not influence device operation.
2, test macro manufacturing cost is low, and can more than enough air cooler test together, work efficiency is high when use.
3, the air cooler efficiency of different operating conditions can be converted into the energy of the status of criterion by the operational energy efficiency of real-time monitoring air cooler
Effect realizes evaluation criterion.
4, the on-line monitoring that air cooler efficiency can be achieved, directly displays air cooler thermic load, motor power consumption and Energy Efficiency Ratio
Real-time dynamic waveform figure.
5, new method quantifies the operating status judgment criteria of air cooler, can simple, intuitive on the diagram judgement it is air-cooled
Whether device is in normal operating condition, can timely take measures when a problem occurs, avoids unnecessary loss.
Detailed description of the invention
Fig. 1 is large-scale petroleum chemical plant installations air cooler efficiency running state real-time monitoring system block diagram；
Fig. 2 is indirect type wall temperature sensor scheme of installation；
Fig. 3 is rectangular section direct-type air velocity/temperature sensor scheme of installation；
Fig. 4 is circular cross-section direct-type air velocity/temperature sensor scheme of installation；
Fig. 5 is electric power measurement instrument scheme of installation；
Fig. 6 is that the measurement of air cooler efficiency operates normally control limit line schematic diagram.
Specific embodiment
Below with reference to embodiment and attached drawing to of the invention real-time based on mean value-moving range method air cooler energy efficiency state
Monitoring method is described in detail.
It is of the invention based on mean value-moving range method air cooler energy efficiency state method of real-time, be with such as Fig. 1 institute
The method in large-scale petroleum chemical plant installations air cooler efficiency running state real-time monitoring system shown.The efficiency level of air cooler
Test result is mainly influenced by two aspect factors, the influence of system factor and enchancement factor, in the operational process of air cooler,
The present invention pay close attention to operating status stability and it is normal whether, if there are biggish variate system shadows in operational process
The factor of sound or Random Effect factor are very big, then all can average value to measurement result (Energy Efficiency Ratio) and standard deviation can all generate it is different
Normal fluctuation, it may be considered that the operating status of air cooler is unstable.Mathematically, if air cooler efficiency is surveyed
The overall distribution parameter (average value and standard deviation) of test result data is held essentially constant or in allowed limits, then it is assumed that empty
The operational process of cooler is stable.It the reason of deviation should be analyzed if distribution parameter is beyond the range allowed, takes arrange in time
Apply the operating status of adjustment air cooler.
Include tested air cooler 1 in Fig. 1, the tested motor 2 being connected with tested air cooler 1, be mounted on be tested it is air-cooled
2 groups of indirect type wall temperature sensors 3,4 and one group of pressure/flow sensor 5 on 1 outlet conduit of device, are mounted on and are separately mounted to
The defeated of tested motor 2 is arranged in one group of direct-type air velocity/temperature sensor 6,7 at the air ports of air cooler
One group of electric power measurement instrument 8 of outlet, with indirect type wall temperature sensor, direct-type air velocity/temperature sensor and electric work
The connected wireless data transmitter 9 of rate measuring instrument, the wireless data receiver of the data for receiving wireless data transmitter 9
10, and the control system 11 and factory's real-time dataBase system 12 that are connected with wireless data receiver 10.
It is of the invention based on mean value-moving range method air cooler energy efficiency state method of real-time, include the following steps：
1) choose measuring point, respectively install indirect type wall temperature sensor, pressure/flow sensor, electric power measurement instrument with
And direct-type air velocity/temperature sensor.Wherein,
(1) the indirect type wall temperature sensor described in is mounted on away from the nearest pipeline of air cooler and far from connector and elbow
Position, to guarantee measurement accuracy.Measurement point preferentially chooses vertical pipeline, to reduce the influence that fixed gas measures temperature；
The indirect type wall temperature sensor is as shown in Fig. 2, include 4 armourings T-type thermocouple a1, a2, a3, a4, a pair
Semicircle thermally conductive red copper arc plate b1, b2, a pair of semicircle flexible heat-insulating material arc plate c1, c2.A pair of of fastening kit d1,
D2, g are tube fluid medium.Thermally conductive copper sheet b1, b2 tight is in pipeline wall surface e.Described fastening kit d1, d2 will
Described thermally conductive copper sheet b1, b2 are tightly attached to tube wall.It is placed between described fastening kit d1, d2 and described thermally conductive copper sheet b1, b2
The pair of circular flexible heat-insulating material arc plate c1, c2 are as heat insulation layer.Thermally conductive red copper arc plate b1, b2 lateral opening hole, heat
The syringe needle of galvanic couple a1, a2, a3, a4 are inserted into thermally conductive red copper arc plate b1, b2, pipeline e surrounding are evenly arranged in, between syringe needle and aperture
Insert high thermal conductivity coefficient glue, it is ensured that temperature measurement accuracy and installation fixing.
Indirect type wall temperature sensor is installed, bolt is tightened, confirmation indirect type wall temperature sensor is close to tube wall；If pipeline exists
Insulating layer after removing insulating layer installation indirect type wall temperature sensor, restores insulating layer, and compensation lead of thermocouple plug, which passes through, to be protected
Warm layer；Indirect type wall temperature sensor is mounted on tube wall for a long time, provides convenience for the work of later temperature test；
The temperature measuring point is polishing clean region, polishing region and the indirect type temperature sensor width phase
Together, in order to avoid tube wall rusty stain and spot influence temperature measurement.
One air cooler pipe laterally has 2 temperature measuring points, and each temperature measuring point is equipped with one group of indirect type wall temperature sensor, and one group
Indirect type wall temperature sensor includes that 4 T-type thermocouples are respectively a1-a4.
(2) pressure/flow sensor described in, is mounted on the intake header or outlet header of air cooler, according to reality
Landform selects convenient position, and the pressure/flow sensor that device has been installed can also be used；
(3) direct-type air velocity/temperature sensor described in is 2, is separately mounted to the air ports of air cooler
Place, for measuring the wind speed and temperature into and out of air port of an air cooler.Wherein,
Rectangle air port section uses small rectangular centre point mensuration, as shown in figure 3, air port section is divided into several squares
Shape, X-type hot line probe 101 is arranged in rectangular centre, for measuring the central point wind speed and temperature, then calculates central point wind
Speed and temperature algebraic mean value；The precision of small Rectangular Method measurement is related with the size of small rectangular partition, and the side length of the rectangle is
300~500mm, tube bank width is smaller, and the corresponding division of the side length of rectangle is smaller；
Round air port section uses equal-area method, as shown in figure 4, the annulus for 5 concentric circles that air port section is divided into,
Using the center of circle of concentric circles as coordinate origin, cross sectional coordinate, i.e. abscissa and ordinate are done, each annulus and cross sectional coordinate axis are equal
There are 4 intersection points, 5 annulus share 20 intersection points, and 20 intersection points are measuring point, install direct-type air velocity/temperature sensing
The X-type hot line probe 101 of device, the radius r of each annulus measuring pointiIt is calculated with following formula：
D in formulaiFor air duct internal diameter, unit m；I is the serial number of Middle Ring Line or test point annulus, i=1~5；riFor test point
Annular radii, unit m；
(4) the electric power measurement instrument described in, be mounted on driving fan for air cooler motor circuit on, specifically according to
The installation method of selected electric power measurement instrument is installed.
One group of electric power measurement instrument 8 is high-precision power measuring instrumentss LMG95, for measuring the instantaneous of motor
Power, basic accuracy is up to 0.03%, 6~600V of voltage range, current range 150mA~20A.One group of electric power measurement
The measurement that ammeter, kilowatt-hour meter and watt meter carry out power of motor can also be used in instrument.One group of electric power measurement instrument peace
Dress figure is shown in Fig. 5.In figure, D is fan electromotor；T1, T2 are current transformer；W1, W2 are watt meter；I is electric current binding post；U
For voltage link column.
2) wireless data transmitter is built, for surveying indirect wall type temperature sensor measurement value, pressure/flow sensor
Magnitude, direct-type air velocity/temperature sensor measurement value, electric power measurement instrument measurements are passed using the method for wireless communication
Transport to wireless data receiver end；
Described builds wireless data transmitter, tests an air cooler and needs a wireless data transmitter, collector
Channel is 40, and the transmitter is lithium battery using power supply, 8 thermocouples difference that two groups of indirect type wall temperature sensors include
Wireless temperature data source is accessed, temperature data is received by wireless data receiver；One group of direct-type air velocity/temperature
Several X-type hot lines probe that sensor includes is respectively connected to wireless data transmitter, receives speed by wireless data receiver
Degree, temperature data.
3) build wireless data receiver, for receive storage temperature, pressure, flow, speed and power data and with shifting
Dynamic PC communication, the wireless data receiver can receive the data that more than one wireless data transmitter is emitted, from
And realize the function that more air coolers are tested together.
The wireless data receiver receives the temperature number for 8 thermocouples that two groups of indirect type wall temperature sensors include
According to when temperature acquisition is normal, start recording valid data, the record time is 10 minutes；Record starts to measure the air cooler time
With end time of measuring；It saves and measures temperature data in the effective time of measuring of air cooler, pass through each indirect type wall temperature sensor
In 4 thermocouple measurement arithmetic mean of instantaneous values, respectively obtain air cooler tube side inlet temperature T’, tube side export T "；
The wireless data receiver receives several X-types that one group of direct-type air velocity/temperature sensor includes
Hot line probe acquire respectively speed, temperature data；When data acquisition is normal, start recording valid data, the record time is 10
Minute；Record starts to measure the air cooler time and terminates time of measuring；Measurement data in the effective time of measuring of air cooler is saved, is led to
The X-type hot line probe measurement arithmetic mean of instantaneous value in each direct-type air velocity/temperature sensor is crossed, air cooler sky is respectively obtained
Gas side inlet temperature t1, outlet temperature t2, inlet velocity u ', muzzle velocity u ".
4) on-line monitoring system platform is built, real-time data base, data analysis including foundation are looked into performance calculating, data
Inquire about display, actual measurement Energy Efficiency Ratio converted to obtain Energy Efficiency Ratio under the status of criterion, and export the thermic load of air cooler, heat transfer coefficient,
The real-time dynamic waveform figure of motor power consumption and Energy Efficiency Ratio.Described builds on-line monitoring system platform, specifically includes：
(1) real-time data base is established
Establish real-time data base, including store by wireless data receiver be transmitted to computer real time temperature detection data,
Real-time wind speed/temperature detection data, realtime power detection data, the ginseng such as flow, machining load of related tube side extracted from DCS
The deposit real-time data base such as number, medium physical property, medium enthalpy at each temperature, the structural parameters of air cooler and heat exchange area.
(2) performance of online air cooler calculates, i.e. the calculating of the overall heat-transfer coefficient and Energy Efficiency Ratio of air cooler：
The total heat exchange amount of air cooler calculates：
Q=Wo·Cp(t2-t1)
In formula：Q is the total heat exchange amount of air cooler；M is the flow (kg/s) of air cooler tube side；H ', h " are tube side medium in sky
Enthalpy under cooler out temperature；WoFor the mass flow (kg/s) of air side；CpFor air specific heat capacity (J/ (kg DEG C))；
t1, t2For the out temperature (DEG C) of air.Since the component of medium is difficult to obtain, enthalpy dyscalculia generally uses air side
It calculates, i.e.,：
Q=Wo·Cp(t2-t1)
The mass flow calculation of air cooler air side：
Wo=3600AF·UF·ρ
In formula：AFFor air duct sectional area (m2)；UFFor air velocity (m/s)；ρ is atmospheric density (kg/m3)。
Air cooler Average heat transfer differential thermal calculation：
If △ T1/△T2>When 1.7, △ Tm=(△ T1-△T2)/ln(△T1/△T2)；
If △ T1/△T2When≤1.7, △ Tm=(△ T1+△T2)/2
Wherein △ T1=T’-t2, △ T2=t2-t1
△ Tm is air cooler heat transfer temperature difference in formula；T’For pipe side-entrance temperature DEG C；T " is pipe side outlet temperature DEG C；t1For sky
Gas inlet temperature DEG C；t2For air exit temp DEG C；Ln is natural logrithm.
Air cooler overall heat-transfer coefficient：
K=Q/A △ Tm
In formula：K is the overall heat-transfer coefficient (W/m of air cooler2·℃)；A is the heat exchange area (m of air cooler2)。
Energy Efficiency Ratio (EER) calculates：
In view of four seasons temperature is different, operational efficiency of the same air cooler under different working conditions is also different, therefore
Operational energy efficiency under different operating conditions is converted into the efficiency under standard condition, i.e. the total heat exchange amount of air cooler and fan electromotor is being marked
The ratio of electric power input value under quasi- air regime,
Standard air situation refers to：Density p0=1.05kg/m3；Pressure P0=101325Pa；t0=20 DEG C；
If air cooler air quantity cannot automatically adjust, fan electromotor consumption power is inversely proportional with air inlet absolute temperature,
Fan electromotor consumes power and increases, the motor power (output) under same thermic load standard air air inlet operating condition as temperature reduces
Consume NStandardThe air cooler motor power (output) consumption N obtained with electric power measurement apparatus measuresActual measurementThe following formula of relationship obtain：
If air cooler air quantity can automatically adjust, the blower for adjusting air quantity has turn angle fan and adjustable speed fan, same thermic load
Motor power (output) under standard air air inlet operating condition consumes NStandardThe air cooler motor function obtained with electric power measurement apparatus measures
Rate consumes NActual measurementThe following formula of relationship obtain：
Turn angle fan：
Adjustable speed fan：
In formula：NActual measurementFor the air cooler motor power (output) consumption that electric power measurement apparatus measures obtain, unit W；NStandardIt is same
Etc. motor power (output) consumption under thermic loads standard air air inlet operating condition, unit W, x are what air quantity was automatically adjusted with temperature change
Relative power, it is specific as follows：
When temperature is -15 DEG C, angle modulation relative power is 40.0%, and speed regulation relative power is 22.0%；
When temperature is -10 DEG C, angle modulation relative power is 32.0%, and speed regulation relative power is 10.0%；
When temperature is -5 DEG C, angle modulation relative power is 18.0%, and speed regulation relative power is 4.5%；
When temperature is 0 DEG C, angle modulation relative power is 15.0%, and speed regulation relative power is 1.5%；
When temperature is 5 DEG C, angle modulation relative power is 16.0%, and speed regulation relative power is 2.5%；
When temperature is 10 DEG C, angle modulation relative power is 18.0%, and speed regulation relative power is 8.5%；
When temperature is 15 DEG C, angle modulation relative power is 21.50%, and speed regulation relative power is 12.5%；
When temperature is 20 DEG C, angle modulation relative power is 31.5%, and speed regulation relative power is 25.0%；
When temperature is 25 DEG C, angle modulation relative power is 48.0%, and speed regulation relative power is 42.0%；
When temperature is 30 DEG C, angle modulation relative power is 66.0%, and speed regulation relative power is 66.0%；
When temperature is 35 DEG C, angle modulation relative power is 100.0%, and speed regulation relative power is 100.0%；
Numerical simulation software (HTRI) can also be used to adjustable speed fan, with on-the-spot test tube side process conditions (identical tube side
Inlet and outlet condition, thermic load) and status of criterion air be input condition, carry out the check type meter of the equivalent operating condition of in-service air cooling apparatus
It calculates, obtains meeting the air quantity of air side status of criterion air under the conditions of identical cooling technique, outlet temperature and required full blast
Pressure.According to the relationship that electrical consumption power is directlyed proportional to wind pressure to air quantity product, the power of motor under the status of criterion is obtained.
The trapped energy theory of air cooler：
EER=Q/NStandard
Wherein, Q is the total heat exchange amount of air cooler.
5) it draws air cooler efficiency and measures monodrome point diagram, after obtaining real-time Energy Efficiency Ratio data, according to GB/T 4091-
2001《Shewhart control chart》Relevant regulations, using mean value -- moving range method draws the list for judging air cooler performance efficiency
It is worth point diagram；Including：
To determine the actual operating state for being evaluated air cooler, the base measured under the operating condition that air cooler need to be selected to operate normally
Plinth data include temperature, pressure, flow, speed and power data, calculate Energy Efficiency RatioDetermine the efficiency of accidental conditions
It is the daily efficiency detection of next step air cooler than the position of EER upper control line UCL and lower control line LCL and exception control line YCL
The foundation of offer, it is contemplated that a possibility that field conduct, basic data measuring phases are quasi- to carry out i batch, i=5-10, every batch of n
A data, n are the integer more than or equal to 2；Nominal situation operates normally in one month after referring generally to general overhaul.
(1) average value of trapped energy theory is calculatedWith trapped energy theory moving range mean value
To average valueWith moving range mean valueIt is calculated, is obtained by following formula：
EERi=(EERi1+EERi2)/2(EERiFor 2 mean values of replication)；
In formula:EERiFor i-th of detected value；RSiFor i-th of moving range；N is detection batch；
(2) determination of control limit is operated normally
According to the regulation in GB/T 4091-2001 shewhart control chart, every batch of duplicate measurements 2 times：
For EER：
(3) determination of misoperation control limit
For EER：
(4) measurement of the basic data of 5-10 batch, including temperature, pressure are carried out under air cooler accidental conditions
Power, flow, speed and power data calculate separately out trapped energy theory and each batch to 2 groups of data of every batch of measurement
Average value EERiAnd the average value of 5-10 batchTo measure batch as abscissa, trapped energy theory is ordinate, often
A batch Energy Efficiency Ratio average value EERiIt puts on the vertical line of this batch respectively, to obtain the list of reflection air cooler efficiency variation
It is worth point diagram, according toDetermine the upper control line UCL of accidental conditions, the position of lower control line LCL and exception control line YCL
It sets, draws out air cooler efficiency and operate normally control limit line chart, air cooler efficiency is operated normally into control limit line chart, is divided into
The area A, the area B, the area C, wherein region of the area A between upper control line UCL and lower control line LCL is normal operating zone；The area B is
Region between lower control line LCL and exception control line YCL, is focused on the area of concern domain；The area C is that exception control line YCL is below
Region is abnormal area, in this, as the foundation of the daily actual motion efficiency detection of air cooler.
6) air cooler Energy Efficiency Analysis is carried out according to the daily efficiency measurement monodrome point diagram of air cooler.
The daily Energy Efficiency Analysis of the air cooler is using dot map analysis method, is to pass through operation number to day-to-day operation air cooler
It include that temperature, pressure, flow, speed and power data calculate actual motion trapped energy theory according to detection, by trapped energy theory pair
Energy Efficiency Analysis can then be carried out by operating normally control limit line chart according to air cooler efficiency, as shown in fig. 6, will be without departing from normal operation
The range of lower control limit is defined as the area A, will be less than operating normally lower control limit, and the range higher than misoperation control limit is fixed
Justice is the area B, and the range that will be less than misoperation control limit is defined as the area C.Concrete analysis standard is：
(1) actual motion trapped energy theory is located at the area A, without departing from the range for operating normally upper lower control limit, illustrates the sky
Cooler operation conditions is normal, this equipment is normal use.
(2) actual motion trapped energy theory is located at the area B, lower than lower control limit is operated normally, is higher than misoperation and controls boundary
Limit is improved empty under the premise of meeting technique production requirement in terms of adjusting process parameter, the reasonable process condition of selection
The operating status of cooler improves Energy Efficiency Ratio, and adjusted rear air cooler runs practical Energy Efficiency Ratio and returns to normal, then the air cooler continues
Operation；If still run on the area B after adjusted, then increase the frequency of efficiency detection, it is proposed that be monthly 1 time.
(3) actual motion trapped energy theory is located at the area C, is lower than misoperation control limit, need to carry out ammonium salt crystallization possibility
And injection point position analysis eliminates heat-exchanging tube bundle blocking and perforation failure using Infrared Detection Method and related lossless detection method
Possibility, the operating status of adjusting process parameter improvement air cooler, improve Energy Efficiency Ratio；Air cooler runs practical efficiency after adjusted
Than returning to normal, then the air cooler continues to run；If run on the area B after adjusted, then the frequency for increasing efficiency detection is needed, it is proposed that
It is monthly 1 time；It is built when air cooler shell-side outlet temperature meets requirement of actual working condition as adjusted rear air cooler still runs on the area C
View reinforces the energy efficiency monitoring of the air cooler by using energy efficiency monitoring frequency or the online energy efficiency monitoring system of installation is such as increased, after
Reforwarding row；If still cannot meet the technological requirements, it is proposed that cut standby platform and place under repair.
Claims (7)
1. a kind of based on mean value-moving range method air cooler energy efficiency state method of real-time, which is characterized in that including as follows
Step：
1) measuring point is chosen, indirect type wall temperature sensor, pressure/flow sensor, electric power measurement instrument and straight are installed respectively
Connect formula air velocity/temperature sensor.
2) wireless data transmitter is built, for measuring indirect wall type temperature sensor measurement value, pressure/flow sensor
Value, direct-type air velocity/temperature sensor measurement value, electric power measurement instrument measurements are transmitted using the method for wireless communication
To wireless data receiver end；
3) wireless data receiver is built, for receiving storage temperature, pressure, flow, speed and power data and and mobile PC
Communication, the wireless data receiver can receive the data that more than one wireless data transmitter is emitted, thus real
The function that now more air coolers are tested together.
4) build on-line monitoring system platform, real-time data base including foundation, data analysis calculate with performance, data query and
Actual measurement Energy Efficiency Ratio is converted to obtain Energy Efficiency Ratio under the status of criterion, and exports the thermic load of air cooler, heat transfer coefficient, motor by display
The real-time dynamic waveform figure of power consumption and Energy Efficiency Ratio.
5) it draws air cooler efficiency and measures monodrome point diagram, after obtaining real-time Energy Efficiency Ratio data, according to GB/T 4091-2001
《Shewhart control chart》Relevant regulations, using mean value -- moving range method draws the monodrome point for judging air cooler performance efficiency
Figure；
6) air cooler Energy Efficiency Analysis is carried out according to the daily efficiency measurement monodrome point diagram of air cooler.
2. it is according to claim 1 based on mean value-moving range method air cooler energy efficiency state method of real-time, it is special
Sign is, in step 1),
(1) the indirect type wall temperature sensor described in is mounted on away from the nearest pipeline of air cooler and far from connector and elbow position
It sets, to guarantee measurement accuracy.Measurement point preferentially chooses vertical pipeline, to reduce the influence that fixed gas measures temperature；
Indirect type wall temperature sensor is installed, bolt is tightened, confirmation indirect type wall temperature sensor is close to tube wall；If there is heat preservation in pipeline
Layer restores insulating layer after removing insulating layer installation indirect type wall temperature sensor, and compensation lead of thermocouple plug passes through heat preservation
Layer；Indirect type wall temperature sensor is mounted on tube wall for a long time, provides convenience for the work of later temperature test；
One air cooler pipe laterally has 2 temperature measuring points, and each temperature measuring point is equipped with one group of indirect type wall temperature sensor, and one group indirect
Formula wall temperature sensor includes that 4 T-type thermocouples are respectively a1~a4.
(2) pressure/flow sensor described in, is mounted on the intake header or outlet header of air cooler；
(3) direct-type air velocity/temperature sensor described in, is separately mounted at the air ports of air cooler, wherein
Rectangle air port section uses small rectangular centre point mensuration, and air port section is divided into several rectangles, X-type hot line probe cloth
It sets in rectangular centre, for measuring the central point wind speed and temperature, then calculates central point wind speed and temperature algebraic mean value；
The side length of the rectangle is 300~500mm, and tube bank width is smaller, and the corresponding division of the side length of rectangle is smaller；
Round air port section uses equal-area method, the annulus for 5 concentric circles that air port section is divided into, with the center of circle of concentric circles
For coordinate origin, cross sectional coordinate, i.e. abscissa and ordinate are done, each annulus and cross sectional coordinate axis have 4 intersection points, and 5
Annulus shares 20 intersection points, and 20 intersection points are measuring point, install direct-type air velocity/temperature sensor, and each annulus is surveyed
The radius r of pointiIt is calculated with following formula：
D in formulaiFor air duct internal diameter, unit m；I is the serial number of Middle Ring Line or test point annulus, i=1~5；riFor the circle of test point
Ring radius, unit m；
(4) the electric power measurement instrument described in is mounted on the circuit of driving fan for air cooler motor, specifically according to selected
The installation method of electric power measurement instrument is installed.
3. it is according to claim 1 based on mean value-moving range method air cooler energy efficiency state method of real-time, it is special
Sign is, builds wireless data transmitter described in step 2), tests an air cooler and needs a wireless data transmitter, adopts
Storage channel is 40, and 8 thermocouples that two groups of indirect type wall temperature sensors include are respectively connected to wireless temperature data source,
Temperature data is received by wireless data receiver；Several X-types heat that one group of direct-type air velocity/temperature sensor includes
Line probe is respectively connected to wireless data transmitter, receives speed, temperature data by wireless data receiver.
4. it is according to claim 1 based on mean value-moving range method air cooler energy efficiency state method of real-time, it is special
Sign is that wireless data receiver described in step 3) receives the temperature for 8 thermocouples that two groups of indirect type wall temperature sensors include
Degree evidence, when temperature acquisition is normal, start recording valid data, the record time is 10 minutes；Record starts to measure air cooler
Time and end time of measuring；It saves and measures temperature data in the effective time of measuring of air cooler, passed by each indirect type wall temperature
4 thermocouple measurement arithmetic mean of instantaneous values in sensor respectively obtain air cooler tube side inlet temperature T ', tube side outlet T "；
The wireless data receiver receives several X-type hot lines that one group of direct-type air velocity/temperature sensor includes
Pop one's head in acquire respectively speed, temperature data；When data acquisition is normal, start recording valid data, the record time is 10 minutes；
Record starts to measure the air cooler time and terminates time of measuring；Measurement data in the effective time of measuring of air cooler is saved, by every
X-type hot line probe measurement arithmetic mean of instantaneous value in a direct-type air velocity/temperature sensor, respectively obtains air cooler air side
Inlet temperature t1, outlet temperature t2, inlet velocity u ', muzzle velocity u ".
5. it is according to claim 1 based on mean value-moving range method air cooler energy efficiency state method of real-time, it is special
Sign is, on-line monitoring system platform is built described in step 4), including：
(1) real-time data base is established
Establish real-time data base, including store by wireless data receiver be transmitted to computer real time temperature detection data, in real time
Wind speed/temperature detection data, realtime power detection data, the parameters such as flow, machining load of related tube side extracted from DCS,
The deposit real-time data base such as medium physical property, medium enthalpy at each temperature, the structural parameters of air cooler and heat exchange area.
(2) performance of online air cooler calculates, i.e. the calculating of the overall heat-transfer coefficient and Energy Efficiency Ratio of air cooler：
The total heat exchange amount of air cooler calculates：
Q=Wo·Cp(t2-t1)
In formula：Q is the total heat exchange amount of air cooler；WoFor the mass flow (kg/s) of air side；CpFor air specific heat capacity (J/ (kg
℃))；t1, t2For the out temperature (DEG C) of air.
The mass flow calculation of air cooler air side：
Wo=3600AF·UF·ρ
In formula：AFFor air duct sectional area (m2)；UFFor air velocity (m/s)；ρ is atmospheric density (kg/m3)。
Air cooler Average heat transfer differential thermal calculation：
If △ T1/△T2>When 1.7, △ Tm=(△ T1-△T2)/ln(△T1/△T2)；
If △ T1/△T2When≤1.7, △ Tm=(△ T1+△T2)/2
Wherein △ T1=T '-t2, △ T2=t2-t1
△ Tm is air cooler heat transfer temperature difference in formula；T ' is pipe side-entrance temperature DEG C；T " is pipe side outlet temperature DEG C；t1For air into
Mouth temperature DEG C；t2For air exit temp DEG C；Ln is natural logrithm.
Air cooler overall heat-transfer coefficient：
K=Q/A △ Tm
In formula：K is the overall heat-transfer coefficient (W/m of air cooler2·℃)；A is the heat exchange area (m of air cooler2)。
Energy Efficiency Ratio (EER) calculates：
In view of four seasons temperature is different, operational efficiency of the same air cooler under different working conditions is also different, therefore will not
It is converted into the efficiency under standard condition with the operational energy efficiency under operating condition, i.e., the total heat exchange amount of air cooler and fan electromotor are in standard null
The ratio of electric power input value under vaporous condition,
Standard air situation refers to：Density p0=1.05kg/m3；Pressure P0=101325Pa；t0=20 DEG C；
If air cooler air quantity cannot automatically adjust, fan electromotor consumption power is inversely proportional with air inlet absolute temperature, blower
Motor consumes power and increases as temperature reduces, the motor power (output) consumption under same thermic load standard air air inlet operating condition
NStandardThe air cooler motor power (output) consumption N obtained with electric power measurement apparatus measuresActual measurementThe following formula of relationship obtain：
If air cooler air quantity can automatically adjust, the blower for adjusting air quantity has turn angle fan and adjustable speed fan, same thermic load air
Motor power (output) under standard air inlet operating condition consumes NStandardThe air cooler motor power (output) obtained with electric power measurement apparatus measures disappears
Consume NActual measurementThe following formula of relationship obtain：
Turn angle fan：
Adjustable speed fan：
In formula：NActual measurementFor the air cooler motor power (output) consumption that electric power measurement apparatus measures obtain, unit W；NStandardFor same heat
Motor power (output) consumption under load standard air air inlet operating condition, unit W, x automatically adjust for air quantity with temperature change opposite
Power, it is specific as follows：
When temperature is -15 DEG C, angle modulation relative power is 40.0%, and speed regulation relative power is 22.0%；
When temperature is -10 DEG C, angle modulation relative power is 32.0%, and speed regulation relative power is 10.0%；
When temperature is -5 DEG C, angle modulation relative power is 18.0%, and speed regulation relative power is 4.5%；
When temperature is 0 DEG C, angle modulation relative power is 15.0%, and speed regulation relative power is 1.5%；
When temperature is 5 DEG C, angle modulation relative power is 16.0%, and speed regulation relative power is 2.5%；
When temperature is 10 DEG C, angle modulation relative power is 18.0%, and speed regulation relative power is 8.5%；
When temperature is 15 DEG C, angle modulation relative power is 21.50%, and speed regulation relative power is 12.5%；
When temperature is 20 DEG C, angle modulation relative power is 31.5%, and speed regulation relative power is 25.0%；
When temperature is 25 DEG C, angle modulation relative power is 48.0%, and speed regulation relative power is 42.0%；
When temperature is 30 DEG C, angle modulation relative power is 66.0%, and speed regulation relative power is 66.0%；
When temperature is 35 DEG C, angle modulation relative power is 100.0%, and speed regulation relative power is 100.0%；
The trapped energy theory of air cooler：
EER=Q/NStandard
Wherein, Q is the total heat exchange amount of air cooler.
6. it is according to claim 1 based on mean value-moving range method air cooler energy efficiency state method of real-time, it is special
Sign is that step 5) includes：
To determine the actual operating state for being evaluated air cooler, the basic number measured under the operating condition that air cooler need to be selected to operate normally
According to including temperature, pressure, flow, speed and power data, Energy Efficiency Ratio is calculatedDetermine the Energy Efficiency Ratio of accidental conditions
The position of EER upper control line UCL and lower control line LCL and exception control line YCL mention for the daily efficiency detection of next step air cooler
The foundation of confession, it is contemplated that a possibility that field conduct, basic data measuring phases are quasi- to carry out i batch, i=5-10, and every batch of n
Data, n are the integer more than or equal to 2；Nominal situation operates normally in one month after referring generally to general overhaul.
(1) average value of trapped energy theory is calculatedWith trapped energy theory moving range mean value
To average valueWith moving range mean valueIt is calculated, is obtained by following formula：
EERi=(EERi1+EERi2)/2(EERiFor 2 mean values of replication)；
RSI=| EERi+1-EERi|, i=1,2 ..., (i-1).
In formula:EERiFor i-th of detected value；RSiFor i-th of moving range；N is detection batch；
(2) determination of control limit is operated normally
According to the regulation in GB/T 4091-2001 shewhart control chart, every batch of duplicate measurements 2 times：
For EER：
(3) determination of misoperation control limit
For EER：
(4) measurement of the basic data of 5-10 batch, including temperature, pressure, stream are carried out under air cooler accidental conditions
Amount, speed and power data calculate separately out the average value of trapped energy theory and each batch to 2 groups of data of every batch of measurement
EERiAnd the average value of 5-10 batchTo measure batch as abscissa, trapped energy theory is ordinate, each batch
Energy Efficiency Ratio average value EERiIt puts on the vertical line of this batch respectively, to obtain the monodrome point of reflection air cooler efficiency variation
Figure, according toIt determines the upper control line UCL of accidental conditions, the position of lower control line LCL and exception control line YCL, draws
It produces air cooler efficiency and operates normally control limit line chart, air cooler efficiency is operated normally into control limit line chart, is divided into the area A, B
Area, the area C, wherein region of the area A between upper control line UCL and lower control line LCL is normal operating zone；The area B is lower control
Region between line LCL and exception control line YCL processed, is focused on the area of concern domain；The area C is the region below exception control line YCL,
For abnormal area, the foundation detected in this, as the daily actual motion efficiency of air cooler.
7. it is according to claim 1 based on mean value-moving range method air cooler energy efficiency state method of real-time, it is special
Sign is that the daily Energy Efficiency Analysis of air cooler described in step 6), which is using dot map analysis method, to be passed through to day-to-day operation air cooler
Operation data detection includes that temperature, pressure, flow, speed and power data calculate actual motion trapped energy theory, by Energy Efficiency Ratio
EER control air cooler efficiency, which operates normally control limit line chart, can then carry out Energy Efficiency Analysis, and concrete analysis standard is：
(1) actual motion trapped energy theory is located at the area A, without departing from the range for operating normally upper lower control limit, illustrates the air cooler
Operation conditions is normal, this equipment is normal use.
(2) actual motion trapped energy theory is located at the area B, lower than lower control limit is operated normally, is higher than misoperation control limit,
Under the premise of meeting technique production requirement, improved in terms of adjusting process parameter, the reasonable process condition of selection air-cooled
The operating status of device improves Energy Efficiency Ratio, and adjusted rear air cooler runs practical Energy Efficiency Ratio and returns to normal, then the air cooler is after reforwarding
Row；If still run on the area B after adjusted, then increase the frequency of efficiency detection, it is proposed that be monthly 1 time.
(3) actual motion trapped energy theory is located at the area C, is lower than misoperation control limit, need to carry out ammonium salt crystallization possibility and note
Water spot position analysis, using Infrared Detection Method and related lossless detection method, that eliminates heat-exchanging tube bundle blocking and perforation failure can
Can, the operating status of adjusting process parameter improvement air cooler improves Energy Efficiency Ratio；It is extensive to run practical Energy Efficiency Ratio for air cooler after adjusted
Multiple normality, then the air cooler continues to run；If run on the area B after adjusted, then the frequency for increasing efficiency detection is needed, it is proposed that be every
The moon 1 time；If adjusted rear air cooler still runs on the area C, when air cooler shell-side outlet temperature meets requirement of actual working condition, it is proposed that logical
It crosses using as increased energy efficiency monitoring frequency or the online energy efficiency monitoring system of installation, reinforces the energy efficiency monitoring of the air cooler, after reforwarding
Row；If still cannot meet the technological requirements, it is proposed that cut standby platform and place under repair.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711011685 | 2017-10-25 | ||
| CN201711011685X | 2017-10-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108871821A true CN108871821A (en) | 2018-11-23 |
| CN108871821B CN108871821B (en) | 2021-05-14 |
Family
ID=64326098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810218100.XA Active CN108871821B (en) | 2017-10-25 | 2018-03-16 | Real-time monitoring method for energy efficiency state of air cooler based on mean value-moving range method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108871821B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109902939A (en) * | 2019-02-01 | 2019-06-18 | 上海理工大学 | Subway station cold source system efficiency is obtained with the method for operation time limit evolution properties |
| CN110907170A (en) * | 2019-11-30 | 2020-03-24 | 华能如东八仙角海上风力发电有限责任公司 | Wind turbine generator gearbox bearing temperature state monitoring and fault diagnosis method |
| CN112304657A (en) * | 2020-10-17 | 2021-02-02 | 中国石油化工股份有限公司 | Method for dividing key easy-scaling groups of air preheater and monitoring heat exchange efficiency state |
| CN112987897A (en) * | 2019-12-17 | 2021-06-18 | 张峻浩 | Method and device for monitoring outlet air temperature of server power module |
| CN113834681A (en) * | 2021-07-27 | 2021-12-24 | 湖南凯利特能源科技有限公司 | Dynamic energy-saving evaluation method and evaluation system for evaporative air cooler group |
| CN114331211A (en) * | 2022-01-15 | 2022-04-12 | 西南石油大学 | Method for evaluating adaptability of in-service blast air cooler to different natural gases |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105224735A (en) * | 2015-09-21 | 2016-01-06 | 华北电力科学研究院有限责任公司 | Genset energy efficiency analysis method for air |
| CN105423772A (en) * | 2015-11-18 | 2016-03-23 | 东北电力大学 | Power station air cooling system adopting combined refrigeration with shaft seal steam leakage of steam turbine and continuous blow-down waste heat of boiler as well as method for predicting heat-transfer coefficient of air-cooling condenser |
| WO2016172859A1 (en) * | 2015-04-28 | 2016-11-03 | 杭州灿维影像科技有限公司 | Air cooler, cooling system thereof and temperature regulating and balancing method for ct scanning machine |
| CN106595755A (en) * | 2016-11-02 | 2017-04-26 | 中国石油化工股份有限公司 | Large-scale petrochemical device air cooler energy efficiency evaluation on-line monitoring system and method |
-
2018
- 2018-03-16 CN CN201810218100.XA patent/CN108871821B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016172859A1 (en) * | 2015-04-28 | 2016-11-03 | 杭州灿维影像科技有限公司 | Air cooler, cooling system thereof and temperature regulating and balancing method for ct scanning machine |
| CN105224735A (en) * | 2015-09-21 | 2016-01-06 | 华北电力科学研究院有限责任公司 | Genset energy efficiency analysis method for air |
| CN105423772A (en) * | 2015-11-18 | 2016-03-23 | 东北电力大学 | Power station air cooling system adopting combined refrigeration with shaft seal steam leakage of steam turbine and continuous blow-down waste heat of boiler as well as method for predicting heat-transfer coefficient of air-cooling condenser |
| CN106595755A (en) * | 2016-11-02 | 2017-04-26 | 中国石油化工股份有限公司 | Large-scale petrochemical device air cooler energy efficiency evaluation on-line monitoring system and method |
Non-Patent Citations (1)
| Title |
|---|
| 国家质量技术监督局: "常规控制图", 《中华人民共和国国家标准GB/T4091-2001》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109902939A (en) * | 2019-02-01 | 2019-06-18 | 上海理工大学 | Subway station cold source system efficiency is obtained with the method for operation time limit evolution properties |
| CN110907170A (en) * | 2019-11-30 | 2020-03-24 | 华能如东八仙角海上风力发电有限责任公司 | Wind turbine generator gearbox bearing temperature state monitoring and fault diagnosis method |
| CN110907170B (en) * | 2019-11-30 | 2021-03-16 | 华能如东八仙角海上风力发电有限责任公司 | Wind turbine generator gearbox bearing temperature state monitoring and fault diagnosis method |
| CN112987897A (en) * | 2019-12-17 | 2021-06-18 | 张峻浩 | Method and device for monitoring outlet air temperature of server power module |
| CN112304657A (en) * | 2020-10-17 | 2021-02-02 | 中国石油化工股份有限公司 | Method for dividing key easy-scaling groups of air preheater and monitoring heat exchange efficiency state |
| CN113834681A (en) * | 2021-07-27 | 2021-12-24 | 湖南凯利特能源科技有限公司 | Dynamic energy-saving evaluation method and evaluation system for evaporative air cooler group |
| CN113834681B (en) * | 2021-07-27 | 2024-01-30 | 湖南凯利特能源科技有限公司 | Dynamic energy-saving assessment method and system for evaporative air cooler group |
| CN114331211A (en) * | 2022-01-15 | 2022-04-12 | 西南石油大学 | Method for evaluating adaptability of in-service blast air cooler to different natural gases |
| CN114331211B (en) * | 2022-01-15 | 2024-05-14 | 西南石油大学 | Method for evaluating adaptability of in-service blast air cooler to different natural gases |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108871821B (en) | 2021-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108871821A (en) | Based on mean value-moving range method air cooler energy efficiency state method of real-time | |
| CN106595755B (en) | The air cooler efficiency evaluation on-line monitoring system and method for large-scale petroleum chemical plant installations | |
| US6678628B2 (en) | Apparatus and methods for monitoring and testing coolant recirculation systems | |
| CN101255947B (en) | Metered system for automatically capturing fluid flux | |
| CN106872514A (en) | Steady Heat Transfer process heat transfer coefficient and dirtiness resistance value on-line monitoring system and method | |
| CN105067661B (en) | Gas liquid exchanger heat transfer coefficient determining device | |
| CN204988531U (en) | On -line monitoring system suitable for monitoring industry heat exchanger heat transfer performance | |
| CN202471131U (en) | System for carrying out real-time monitoring on performance of steam condenser for power plants | |
| CN102338568A (en) | Online monitoring system and method for performance of condenser in power plant based on cleanness coefficient index | |
| CN110991692B (en) | Heat exchanger group operation condition monitoring, cleaning and early warning method based on dynamic envelope curve method | |
| CN106017968A (en) | EGR cooler heat exchange efficiency detection system | |
| CN112923349A (en) | Dynamic dirt monitoring method and system for low-temperature economizer of coal-fired boiler | |
| CN108692608A (en) | A kind of heat exchanger operation conditions intelligent on-line monitoring device | |
| CN103868558B (en) | A kind of powder flow on-line detecting system and method | |
| CN208606637U (en) | A kind of heat exchanger operation conditions intelligent on-line monitoring device | |
| CN204807492U (en) | Solution -air heat exchanger coefficient of heat transfer surveys device | |
| CN105572168A (en) | Thermal type steam dryness meter | |
| CN103837259B (en) | The measuring method of the minimum tube wall temperature of exposed oil and gas pipes and device | |
| CN207198010U (en) | Steel plant's cooling water corrosion speed detection simulation operating mode device | |
| CN213544038U (en) | Industrial calibration device for heat exchanger | |
| CN205843923U (en) | A kind of full plate-fin heat exchanger fluid resistance feature measurement test specimen | |
| CN202024808U (en) | Recovery type wet steam two-phase flow flowmeter calibration table | |
| CN105136342A (en) | System and method for improving measurement precision of heat exchange amount of heat exchanger under temperature differential condition | |
| CN206906035U (en) | A kind of portable air-conditioning efficiency detector | |
| CN213209163U (en) | Refrigerant mass flow measuring device of air conditioner heat pump system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |