CN106595755A - Large-scale petrochemical device air cooler energy efficiency evaluation on-line monitoring system and method - Google Patents
Large-scale petrochemical device air cooler energy efficiency evaluation on-line monitoring system and method Download PDFInfo
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- CN106595755A CN106595755A CN201610951405.2A CN201610951405A CN106595755A CN 106595755 A CN106595755 A CN 106595755A CN 201610951405 A CN201610951405 A CN 201610951405A CN 106595755 A CN106595755 A CN 106595755A
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- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
The invention provides a large-scale petrochemical device air cooler energy efficiency evaluation on-line monitoring system and method. The system is formed by a data acquisition and emission portion and a data receiving and processing portion. The data acquisition and emission portion comprises a wireless data transmitter, a first indirect wall temperature sensor, a second indirect wall temperature sensor, a pressure/flow sensor, a first direct air velocity/ temperature sensor, a second direct air velocity/ temperature sensor and an electric power measuring instrument, wherein the first indirect wall temperature sensor, the second indirect wall temperature sensor, the pressure/flow sensor, the first direct air velocity/ temperature sensor, the second direct air velocity/ temperature sensor and the electric power measuring instrument are connected with the signal input end of the wireless data transmitter. The data receiving and processing portion comprises a wireless data receiver, a factory real-time database system and a control system, wherein the factory real-time database system and the control system are connected with the wireless data receiver. The method comprises the steps of establishing a real-time database and calculating the performance of an air cooler online. A temperature measurement device is installed without parking; on-line monitoring of energy efficiency of the air cooler can be realized; and real-time dynamic oscillograms of thermal load, heat transfer coefficient, motor power consumption and energy efficiency ratio of the air cooler are displayed directly.
Description
Technical field
The present invention relates to a kind of on-line monitoring system.More particularly to a kind of air cooling for being applied to large-scale petroleum chemical plant installations
Device efficiency evaluation on-line monitoring system and method.
Background technology
Petroleum chemical industry is mainstay of the national economy industry, but while and high energy consumption industry, the section of the current whole industry
Energy emission reduction work is faced with severe challenge.In general, the heat of the industrial medium less than 120 DEG C does not have recovery value,
Multiplex water cooler or air cooler are taken away.Compared with water-cooled, air cooling has the following advantages：Save substantial amounts of water for industrial use；Economy
It is high；The water pollution of industrial area is reduced, improves environmental quality.
Air cooling system is the important special equipment system of large-scale petroleum chemical plant installations, and the medium composition conveyed in its tube bank is multiple
It is miscellaneous, and there are corrosivity, with the increase of run time, tube bank leakage, blast, fire and intoxication accident happen occasionally, to enterprise
Industry production, surrounding enviroment and masses' lives and properties cause serious impact.Due to the presence of the elements such as S in medium, N and Cl,
The corrosive mediums such as the H2S generated in course of reaction, HCl, NH3 air cooler be internally formed ammonium salt crystallization blocking and underdeposit corrosion,
Wet H2S etc., makes secondary operations device（Be hydrocracked, diesel oil hydrogenation, kerosene hydrogenation etc.）It is a greater impact.So can be right
The safe efficient operation of air cooler constitutes a threat to, and directly influences normal production.
Only have part air cooler to have flow monitoring to medium in pipe at this stage, substantially no temperature monitoring, air side are even more
Without any monitoring device.Therefore, do not possess the condition of real-time monitoring air cooler efficiency.If increasing monitoring point, in addition it is also necessary to spread
If cable, control room can be just passed the signal to, quantities is larger.Therefore need to set up a kind of convenient accurate, construction party of detection
The on-line monitoring system of monitoring large-scale petroleum chemical plant installations air cooler efficiency just.Different in view of four seasons temperature, same empty
Operational efficiency of the cooler under different working conditions is also different, so while being necessary to provide a large-scale petroleum chemical plant installations sky
The method of cooler efficiency evaluation.
The content of the invention
The technical problem to be solved is to provide a kind of large-scale stone of the on-line monitoring of achievable air cooler efficiency
The air cooler efficiency evaluation on-line monitoring system of oily chemical plant installations and method.
The technical solution adopted in the present invention is：It is a kind of be applied to large-scale petroleum chemical plant installations air cooler efficiency evaluation
Line monitoring system, is made up of data acquisition emitting portion and data reception processing unit point, described data acquisition emitting portion
Including for launching the wireless data transmitter of data to data receiver process part, believe with the wireless data transmitter respectively
What number input was connected：Be arranged on tested air cooler tube side medium entrance or outlet on the first indirect type wall temperature sensor,
Be arranged on tested air cooler tube side media outlet or import on the second indirect type wall temperature sensor, be arranged on tested air cooler
Tube side medium entrance or outlet on pressure/flow sensor, be arranged on tested air cooler air inlet or air outlet the
One direct-type air velocity/temperature sensor, be arranged on tested air cooler air outlet or air inlet on the second direct-type air
Speed/temperature sensor and the electric power measurement instrument being arranged on the binding post of tested motor；The data receiver
Process part includes：The wireless data receiver of data launched by emitting portion is gathered for receiving data, respectively with it is described
Wireless data receiver be connected the factory's real-time dataBase system for storing and inquiring about all kinds of service datas of air cooler and
Control system.
The first described indirect type wall temperature sensor and the second indirect type wall temperature sensor structure are identical, include：It is interior
The pipeline of portion's streaming flow medium, is led by the laterally zygomorphic upper half circle being wrapped on the pipeline outer wall of connection fixture
Hot red copper arc plate and lower semi-circular heat conduction red copper arc plate, are wrapped in the upper semi-circle by connection fixture is laterally zygomorphic
Upper half circular flexible adiabator arc plate on shape heat conduction red copper arc plate and lower semi-circular heat conduction red copper arc plate outer wall and
Lower semi-circular flexibility adiabator arc plate, is wrapped in the upper half circular flexible thermal insulation by connection fixture is laterally zygomorphic
Upper fastening kit and lower fastening kit on material arc plate and lower semi-circular flexibility adiabator arc plate outer wall, wherein, by
Between the heat conduction red copper disk of described upper half circle heat conduction red copper arc plate and lower semi-circular heat conduction red copper arc plate composition is first-class
Every the T-shaped thermocouple of four armourings, the T-shaped thermocouple of four armourings connects the letter of the wireless data transmitter by wire
Number input.
Described the first direct-type air velocity/temperature sensor and the second direct-type air velocity/temperature sensor knot
Structure is identical, is popped one's head according to tested air cooler air outlet or the cross sectional shape and size cloth of air inlet by several X-type hot lines,
Each X-type hot line probe is made up of two monofilament hot line probes for being respectively used to the speed and temperature that measure air, wherein one
Individual monofilament hot line probe connection thermostatic type hot-wire anemometer wind speed interface；Another monofilament hot line is popped one's head in and thermostatic type hot line wind speed
Instrument thermometric interface is connected, and when the cross sectional shape of described tested air cooler air outlet or air inlet is rectangle, described is some
Individual X-type hot line probe is welded on the support of tested air cooler rectangular air outlet or air inlet with the arrangement of matrix.Work as institute
When the tested air cooler air outlet stated or the cross sectional shape of air inlet are circular, several described X-type hot lines probes are welded on
On cross frame with the center of circular air outlet or air inlet as joining.
Described wireless data transmitter has 40 harvester passages, and described wireless data receiver wirelessly enough can connect
Multiple wireless data transmitters are connect, realizes that multiple stage air cooler is tested.
A kind of evaluation methodology for being applied to the on-line monitoring system of large-scale petroleum chemical plant installations air cooler efficiency evaluation,
Comprise the steps：
1）Set up real-time data base；
The real-time data base of setting up includes：Store to be transmitted by radio transmitting device to the real time temperature of control system and detect
Data, real-time wind speed/temperature detection data and realtime power detection data, the relevant tube side extracted from dcs are situated between
The parameters such as mass flow amount, machining load, medium physical property, medium enthalpy at each temperature, the structural parameters of air cooler and heat exchange area；
2）The Performance Calculation of online air cooler, i.e. the calculating of the overall heat-transfer coefficient and Energy Efficiency Ratio of air cooler, including：
The total heat exchange amount calculating of air cooler Wind Coverage Calculation, air cooler, air cooler Average heat transfer differential thermal calculation, air cooler always conduct heat
Coefficient is calculated and air cooler Energy Efficiency Ratio is calculated.
Step 2）Described air cooler Wind Coverage Calculation is to adopt equation below：
Wo=3600·AF·UF·ρ
In formula：AFFor air duct sectional area, unit：m2；UFFor air velocity, unit：m/s；ρ is atmospheric density, single
Position：kg/m3。
Step 2）It is to adopt equation below that the total heat exchange amount of described air cooler is calculated：
Q=m（h’-h”）=Wo·Cp（t2-t1）
In formula：Heat exchange amounts of the Q for air cooler, unit：W；Flows of the m for air cooler tube side, unit：kg/s；H ' and h " is
The import and export enthalpy of tube side, by tube side out temperature T ' and T " is checked in from real-time data base, unit：J/(kg·℃)；WoFor
The mass flow of air side, unit：kg/s；CpFor air specific heat capacity, unit：J/(kg·℃)；t1And t2For the import and export of air
Temperature, unit：℃.
Step 2）Described air cooler Average heat transfer differential thermal calculation is to adopt equation below：
If △ is T1/△T2>When 1.7, △ Tm=（△T1-△T2）/ln（△T1/△T2）；
If △ is T1/△T2When≤1.7, △ Tm=（△T1+△T2）/2
Wherein △ T1=T’-t2, △ T2=t2-t1, t1And t2For the out temperature of air,
In formula, △ Tm are air cooler heat transfer temperature difference；T ' is tube side inlet temperature DEG C；T " is tube side outlet temperature DEG C；t1For sky
Gas inlet temperature DEG C；t2For air exit temp DEG C；Ln is natural logrithm.
Step 2）It is to adopt equation below that described air cooler overall heat-transfer coefficient is calculated：
K=Q/A·△Tm
In formula：Overall heat-transfer coefficients of the K for air cooler, unit：W/m2·℃；Heat exchange areas of the A for air cooler, unit：m2。
Step 2）Described air cooler Energy Efficiency Ratio is calculated, and allows for four seasons temperature difference, and same air cooler is in difference
Operational efficiency under working condition is also different, and the operational energy efficiency under different operating modes is converted into the efficiency under standard condition, i.e. volume
Determine the ratio of heat exchange amount and the electric power input value of tested motor；The standard condition is referred to：Density p0=1.05kg/m3；Pressure
P0=101325Pa；t0=20℃；
The efficiency test of air cooler is generally carried out under non-standard working conditions, is carrying out air cooler Energy Efficiency Ratio calculating
When power of motor consumption need to be converted into the power of motor consumption under equal thermic load standard air air inlet operating mode；
The first situation：If air cooler air quantity can not be automatically adjusted, motor power consumption and air inlet absolute temperature
It is inversely proportional to, it is as follows that motor power consumption N increases formula with temperature reduction：
Second situation：If the operation of fan for air cooler, air quantity can be automatically adjusted according to the change of temperature, wherein：
In formula：NActual measurementFor the air cooler motor power (output) consumption that electric power measurement apparatus measures are obtained, unit：W；NStandardIt is same
Etc. the motor power (output) consumption under thermic load standard air air inlet operating mode, unit：The relative power of W, x for blower fan, unit：%,
Described trapped energy theory formula is as follows：
EER=Q/NStandard。
The air cooler efficiency evaluation on-line monitoring system and method for the large-scale petroleum chemical plant installations of the present invention, with following excellent
Point：
1st, need not stop installation temperature measuring equipment, and temperature measuring equipment simple structure, install convenient do not affect plant running.
2nd, test system low cost of manufacture, and can multiple stage air cooler test together, high working efficiency.
3rd, the thermal property of real-time monitoring air cooler, obtains heat transfer coefficient rule over time.
4th, the operational energy efficiency of real-time monitoring air cooler, the air cooler efficiency of different operating modes can be converted into the energy of the status of criterion
Effect, realizes evaluation criterion.
5th, be capable of achieving the on-line monitoring of air cooler efficiency, directly display air cooler thermic load, heat transfer coefficient, motor power consumption and
The real-time dynamic waveform figure of Energy Efficiency Ratio, is easy to the operational energy efficiency of intuitive judgment air cooler, realizes that air cooler is energy-efficient all with long
The purpose of phase operation.
Description of the drawings
Fig. 1 is on-line monitoring system overall structure diagram of the present invention；
Fig. 2 is the structural representation of indirect type wall temperature sensor in the present invention；
Fig. 3 is that direct-type air velocity/temperature sensor arranges schematic diagram in rectangle air port in the present invention；
Fig. 4 is that direct-type air velocity/temperature sensor arranges schematic diagram in circular air port in the present invention.
In figure
1：Tested air cooler 2：Tested motor
3：First indirect type wall temperature sensor 4：Second indirect type wall temperature sensor
5：Pressure/flow sensor 6：First direct-type air velocity/temperature sensor
7：Second direct-type air velocity/temperature sensor 8：Electric power measurement instrument
9：Wireless data transmitter 10：Wireless data receiver
11：Control system 12：Factory's real-time dataBase system
13：Internal flow fluid media (medium) 14：Pipeline
15：Upper half circle heat conduction red copper arc plate 16：Lower semi-circular heat conduction red copper arc plate
17：Upper half circular flexible adiabator arc plate 18：Lower semi-circular flexibility adiabator arc plate
19：Upper fastening kit 20：Lower fastening kit
21：The T-shaped thermocouple of armouring 22：Connection fixture
Specific embodiment
The air cooler efficiency evaluation of the large-scale petroleum chemical plant installations of the present invention is supervised online with reference to embodiment and accompanying drawing
Examining system and method are described in detail.
As shown in figure 1, being applied to the on-line monitoring system of large-scale petroleum chemical plant installations air cooler efficiency evaluation, it is by data
Collection emitting portion and data reception processing unit point are constituted, it is characterised in that described data acquisition emitting portion include for
Launch the wireless data transmitter 9 of data to data receiver process part, respectively with 9 signal input of the wireless data transmitter
What end was connected：It is arranged on the tube side medium entrance of tested air cooler 1 or the first indirect type wall temperature sensor 3 for exporting, arranges
The second indirect type wall temperature sensor 4 on the tube side media outlet of tested air cooler 1 or import, it is arranged on tested air cooler 1
Tube side medium entrance or outlet on pressure/flow sensor 5, be arranged on 1 air inlet of tested air cooler or air outlet
First direct-type air velocity/temperature sensor 6, be arranged on 1 air outlet of tested air cooler or air inlet on the second direct-type
Air velocity/temperature sensor 7 and the electric power measurement instrument 8 being arranged on the binding post of tested motor 2；The number
Include according to reception processing unit point：The wireless data receiver 10 of the data launched by emitting portion is gathered for receiving data, point
The factory for storing and inquiring about all kinds of service datas of air cooler not being connected with described wireless data receiver 10 is counted in real time
According to storehouse system 12 and control system 11, the control system 11 adopts computer.
As shown in Fig. 2 the first described indirect type wall temperature sensor 3 is identical with 4 structure of the second indirect type wall temperature sensor,
Include：The pipeline 14 of internal flow fluid media (medium) 13, is wrapped in the pipeline by connection fixture 22 is laterally zygomorphic
Upper half circle heat conduction red copper arc plate 15 and lower semi-circular heat conduction red copper arc plate 16 on 14 outer walls, by connection fixture 22
It is laterally zygomorphic to be wrapped on the upper half circle heat conduction red copper arc plate 15 and 16 outer wall of lower semi-circular heat conduction red copper arc plate
Upper half circular flexible adiabator arc plate 17 and lower semi-circular flexibility adiabator arc plate 18, by connection fixture 22
It is laterally zygomorphic to be wrapped in the upper half circular flexible adiabator arc plate 17 and lower semi-circular flexibility adiabator arc plate
Upper fastening kit 19 and lower fastening kit 20 on 18 outer walls, wherein, by described 15 He of upper half circle heat conduction red copper arc plate
On the heat conduction red copper disk that lower semi-circular heat conduction red copper arc plate 16 is constituted, the T-shaped thermocouple 21 of equally spaced four armourings, described
High thermal conductivity coefficient glue is inserted between the syringe needle and aperture of the T-shaped thermocouple of four armourings 21, it is ensured that temperature survey accuracy with install
Fixing.The T-shaped thermocouple 21 of four armourings connects the signal input part of the wireless data transmitter 9 by wire.
As shown in Figure 3, Figure 4, described the first direct-type air velocity/temperature sensor 6 and the second direct-type air speed
7 structure of degree/temperature sensor is identical, is according to 1 air outlet of tested air cooler or air inlet by several X-type hot line probes 61
Cross sectional shape and size cloth, each X-type hot line probe 61 is by two lists for being respectively used to the speed and temperature that measure air
Silk hot line probe composition, the wind speed interface of one of monofilament hot line probe connection thermostatic type hot-wire anemometer TSI-1050, connects
Lead to the temperature switch of this anemobiagraph, adjustment is flow through the electric current of hot line, is allowed to be maintained at smaller range, you can enter the survey of trip temperature
Amount；Another monofilament hot line probe is connected with thermostatic type hot-wire anemometer thermometric interface, measurable flow velocity.
When the cross sectional shape of described 1 air outlet of tested air cooler or air inlet is rectangle, several described X-type heat
Line probe 61 is welded on the support of 1 rectangular air outlet of tested air cooler or air inlet with the arrangement of matrix.Rectangle air port
Section adopts little rectangular centre point measurement method, and air port section is divided into some rectangles, and X-type hot line Probe arrangement is in little rectangle
The heart measures its central point wind speed and temperature, then calculates its algebraic mean value.The precision and little rectangular partition of little Rectangular Method measurement
Size it is relevant, the 300～500mm of the length of side of rectangle, tube bank width it is less, the length of side of little rectangle should also divide less.
When the cross sectional shape of described 1 air outlet of tested air cooler or air inlet is circular, several described X-types heat
Line probe 61 is welded on the cross frame with the center of circular air outlet or air inlet as joining.Circular air port section adopts
Air port section is divided into 5 annulus, takes the Middle Ring Line that each annulus is divided into two area equation annulus by equal-area method, with
Cross sectional coordinate axis has 20 intersection points, is both measuring point.The radius r of 5 groups of measuring pointsiCalculated with following formula：
D in formulai--- air duct internal diameter, m；
I --- Middle Ring Line or the sequence number of test point annulus, i=1～5；
ri--- the annular radii of test point, m.
Described wireless data transmitter 9 has 40 harvester passages, and described wireless data receiver 10 is using electricity
Source is lithium battery, wirelessly can enough connect multiple wireless data transmitters 9, realizes that multiple stage air cooler is tested.
The electric power measurement instrument 8, is high-precision power measuring instrumentss LMG95, for the instantaneous power of measurement motor,
Basic accuracy up to 0.03%, 6～600V of voltage range, current range 150mA～20A.The electric power measurement instrument, also may be used
The measurement of power of motor is carried out using ammeter, kilowatt-hour meter and watt meter.
All kinds of service datas of air cooler are have recorded in factory's real-time dataBase system 12, correspondence air cooler is therefrom inquired about
Each item data of testing time, exports the real-time dynamic waveform of thermic load, heat transfer coefficient, motor power consumption and the Energy Efficiency Ratio of air cooler
Figure.
The build process for being applied to the on-line monitoring system of large-scale petroleum chemical plant installations air cooler efficiency evaluation is as follows：
1st, measuring point is chosen, indirect type wall temperature sensor, pressure/flow sensor, direct-type air velocity/temperature is installed and is passed
Sensor and electric power measurement instrument.
2nd, build wireless data transmitter, for by wall temperature, pressure/flow, air velocity/temperature sensor measurement value and
Electrical power measurements are transmitted to wireless data receiver end.
3rd, build wireless data receiver, be responsible for receiving storage temperature, pressure, flow, speed and power data and with shifting
Dynamic PC communications, can connect multiple wireless data transmitters, realize the function that multiple stage air cooler is tested together.
4th, on-line monitoring system platform is built, including real-time data base, data analysiss and Performance Calculation, the data set up is looked into
The functions such as display are inquired about, actual measurement Energy Efficiency Ratio conversion is obtained into Energy Efficiency Ratio under the status of criterion, and is exported the thermic load of air cooler, heat transfer
The real-time dynamic waveform figure of coefficient, motor power consumption and Energy Efficiency Ratio.
The evaluation for being applied to the on-line monitoring system of large-scale petroleum chemical plant installations air cooler efficiency evaluation of the present invention
Method, comprises the steps：
1）Set up real-time data base；
The real-time data base of setting up includes：Storage is transmitted to control system by radio transmitting device（Computer）It is real-time
Temperature detection data, real-time wind speed/temperature detection data and realtime power detection data, from dcs（DCS）Carry
Parameter, medium physical property, the media such as the relevant tube side rate-of flow that takes, machining load enthalpy at each temperature, the structure of air cooler
Parameter and heat exchange area；
2）The Performance Calculation of online air cooler, i.e. the calculating of the overall heat-transfer coefficient and Energy Efficiency Ratio of air cooler, including：
The total heat exchange amount calculating of air cooler Wind Coverage Calculation, air cooler, air cooler Average heat transfer differential thermal calculation, air cooler always conduct heat
Coefficient is calculated and air cooler Energy Efficiency Ratio（EER）Calculate.
Described air cooler Wind Coverage Calculation is to adopt equation below：
Wo=3600·AF·UF·ρ
In formula：AFFor air duct sectional area, unit：m2；UFFor air velocity, unit：m/s；ρ is atmospheric density, single
Position：kg/m3。
Step 2）It is to adopt equation below that the total heat exchange amount of described air cooler is calculated：
Q=m（h’-h”）=Wo·Cp（t2-t1）
In formula：Heat exchange amounts of the Q for air cooler, unit：W；Flows of the m for air cooler tube side, unit：kg/s；H ' and h " is
The import and export enthalpy of tube side, by tube side out temperature T ' and T " is checked in from real-time data base, unit：J/(kg·℃)；WoFor
The mass flow of air side, unit：kg/s；CpFor air specific heat capacity, unit：J/(kg·℃)；t1And t2For the import and export of air
Temperature, unit：℃.
Step 2）Described air cooler Average heat transfer differential thermal calculation is to adopt equation below：
If △ is T1/△T2>When 1.7, △ Tm=（△T1-△T2）/ln（△T1/△T2）；
If △ is T1/△T2When≤1.7, △ Tm=（△T1+△T2）/2
Wherein △ T1=T’-t2, △ T2=t2-t1, t1And t2For the out temperature of air,
In formula, △ Tm are air cooler heat transfer temperature difference；T ' is tube side inlet temperature DEG C；T " is tube side outlet temperature DEG C；t1For sky
Gas inlet temperature DEG C；t2For air exit temp DEG C；Ln is natural logrithm.
Step 2）It is to adopt equation below that described air cooler overall heat-transfer coefficient is calculated：
K=Q/A·△Tm
In formula：Overall heat-transfer coefficients of the K for air cooler, unit：W/m2·℃；Heat exchange areas of the A for air cooler, unit：m2。
Step 2）Described air cooler Energy Efficiency Ratio（EER）Calculate, allow for four seasons temperature difference, same air cooler exists
Operational efficiency under different working conditions is also different, and the operational energy efficiency under different operating modes is converted into the efficiency under standard condition,
I.e. specified heat exchange amount（That is thermic load）With tested motor（Under normal air situation）Electric power input value ratio；The standard
Operating mode is referred to：Density p0=1.05kg/m3；Pressure P0=101325Pa；t0=20℃；
The efficiency test of air cooler is generally carried out under non-standard working conditions, is carrying out air cooler Energy Efficiency Ratio calculating
When power of motor consumption need to be converted into the power of motor consumption under equal thermic load standard air air inlet operating mode；
The first situation：If air cooler air quantity can not be automatically adjusted, motor power consumption and air inlet absolute temperature
It is inversely proportional to, it is as follows that motor power consumption N increases formula with temperature reduction：
Second situation：If the operation of fan for air cooler, air quantity can be automatically adjusted according to the change of temperature, power of motor
Relative variation can be looked into by table 1.
The relative power that 1 air quantity of table can be automatically adjusted with temperature Change
Wherein：
In formula：NActual measurementFor the air cooler motor power (output) consumption that electric power measurement apparatus measures are obtained, unit：W；NStandardIt is same
Etc. the motor power (output) consumption under thermic load standard air air inlet operating mode, unit：The relative power of W, x for blower fan, unit：%.
Numerical simulation software can also be used to adjustable speed fan（HTRI）, with on-the-spot test tube side process conditions（Identical tube side
Import and export condition, thermic load）And status of criterion air is input condition, carries out the check type meter of the equivalent operating mode of in-service air cooling apparatus
Calculate, be met 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 relation that electrical consumption power is directly proportional to air quantity product to blast, the power of motor under the status of criterion is obtained.
Described trapped energy theory formula is as follows：
EER=Q/NStandard。
Claims (10)
1. a kind of on-line monitoring system for being applied to large-scale petroleum chemical plant installations air cooler efficiency evaluation, is launched by data acquisition
Part and data reception processing unit point are constituted, it is characterised in that described data acquisition emitting portion is included for connecing to data
The wireless data transmitter (9) that process part launches data is received, respectively with the wireless data transmitter (9) signal input part phase
Even：It is arranged on the tube side medium entrance of tested air cooler (1) or the first indirect type wall temperature sensor (3) for exporting, arranges
The second indirect type wall temperature sensor (4) on the tube side media outlet of tested air cooler (1) or import, it is arranged on tested air cooling
Pressure/flow sensor (5) on the tube side medium entrance of device (1) or outlet, it is arranged on tested air cooler (1) air inlet or goes out
The first direct-type air velocity/temperature sensor (6) on air port, it is arranged on tested air cooler (1) air outlet or air inlet
The second direct-type air velocity/temperature sensor (7) and the electrical power being arranged on the binding post of tested motor (2)
Measuring instrument (8)；The data receiver process part includes：The nothing of the data launched by emitting portion is gathered for receiving data
Line data sink (10), be connected with described wireless data receiver (10) respectively for storing and inquiring about air cooler all kinds of
Factory's real-time dataBase system (12) and control system (11) of service data.
2. the on-line monitoring system for being applied to large-scale petroleum chemical plant installations air cooler efficiency evaluation according to claim 1,
Characterized in that, the first described indirect type wall temperature sensor (3) is identical with the second indirect type wall temperature sensor (4) structure,
Include：The pipeline (14) of internal flow fluid media (medium) (13), by connection fixture (22) it is laterally zygomorphic be wrapped in it is described
Upper half circle heat conduction red copper arc plate (15) and lower semi-circular heat conduction red copper arc plate (16) on pipeline (14) outer wall, by even
Connect that fixture (22) is laterally zygomorphic to be wrapped in upper half circle heat conduction red copper arc plate (15) and lower semi-circular heat conduction red copper
Upper half circular flexible adiabator arc plate (17) and lower semi-circular flexibility adiabator arc plate on arc plate (16) outer wall
(18), by connection fixture (22) it is laterally zygomorphic be wrapped in the upper half circular flexible adiabator arc plate (17) and under
Upper fastening kit (19) and lower fastening kit (20) on semicircle flexibility adiabator arc plate (18) outer wall, wherein, by institute
The heat conduction red copper disk that upper half circle heat conduction red copper arc plate (15) stated and lower semi-circular heat conduction red copper arc plate (16) are constituted
The T-shaped thermocouple (21) of upper equally spaced four armourings, the T-shaped thermocouple (21) of four armourings connect described wireless by wire
The signal input part of data source (9).
3. the on-line monitoring system for being applied to large-scale petroleum chemical plant installations air cooler efficiency evaluation according to claim 1,
Characterized in that, described the first direct-type air velocity/temperature sensor (6) and the second direct-type air velocity/temperature are passed
Sensor (7) structure is identical, is according to tested air cooler (1) air outlet or air inlet by several X-type hot lines probe (61)
Cross sectional shape and size cloth, each X-type hot line probe (61) are by two lists for being respectively used to the speed and temperature that measure air
Silk hot line probe composition, one of monofilament hot line probe connection thermostatic type hot-wire anemometer wind speed interface；Another monofilament heat
Line probe is connected with thermostatic type hot-wire anemometer thermometric interface, when described tested air cooler (1) air outlet or air inlet section
When face is shaped as rectangle, several described X-type hot lines probe (61) are welded on tested air cooler (1) with the arrangement of matrix
On the support of rectangular air outlet or air inlet.When the cross sectional shape of described tested air cooler (1) air outlet or air inlet is circle
During shape, several described X-type hot lines probe (61) are welded on the center of circular air outlet or air inlet as joining ten
On word support.
4. the on-line monitoring system for being applied to large-scale petroleum chemical plant installations air cooler efficiency evaluation according to claim 1,
Characterized in that, described wireless data transmitter (9) is with 40 harvester passages, described wireless data receiver (10)
Wirelessly can enough connect multiple wireless data transmitters (9), realize that multiple stage air cooler is tested.
5. a kind of on-line monitoring system for being applied to large-scale petroleum chemical plant installations air cooler efficiency evaluation for described in claim 1
The evaluation methodology of system, it is characterised in that comprise the steps：
1) set up real-time data base；
The real-time data base of setting up includes：Store the real time temperature detection number transmitted by radio transmitting device to control system
According to, real-time wind speed/temperature detection data and realtime power detection data, from the relevant tube side medium that dcs is extracted
The parameters such as flow, machining load, medium physical property, medium enthalpy at each temperature, the structural parameters of air cooler and heat exchange area；
2) Performance Calculation of online air cooler, i.e. the calculating of the overall heat-transfer coefficient and Energy Efficiency Ratio of air cooler, including：
The total heat exchange amount calculating of air cooler Wind Coverage Calculation, air cooler, air cooler Average heat transfer differential thermal calculation, air cooler overall heat-transfer coefficient
Calculate and air cooler Energy Efficiency Ratio is calculated.
6. the on-line monitoring system for being applied to large-scale petroleum chemical plant installations air cooler efficiency evaluation according to claim 5
The evaluation methodology of system, it is characterised in that step 2) described in air cooler Wind Coverage Calculation be to adopt equation below：
Wo=3600AF·UF·ρ
In formula：AFFor air duct sectional area, unit：m2；UFFor air velocity, unit：m/s；ρ is atmospheric density, unit：kg/
m3。
7. the on-line monitoring system for being applied to large-scale petroleum chemical plant installations air cooler efficiency evaluation according to claim 5
The evaluation methodology of system, it is characterised in that step 2) described in the total heat exchange amount of air cooler to calculate be to adopt equation below：
Q=m (h '-h ")=Wo·Cp(t2-t1)
In formula：Heat exchange amounts of the Q for air cooler, unit：W；Flows of the m for air cooler tube side, unit：kg/s；H ' and h " is tube side
Import and export enthalpy, by tube side out temperature T ' and T " check in from real-time data base, unit：J/(kg·℃)；WoFor air
The mass flow of side, unit：kg/s；CpFor air specific heat capacity, unit：J/(kg·℃)；t1And t2For the import and export temperature of air
Degree, unit：℃.
8. the on-line monitoring system for being applied to large-scale petroleum chemical plant installations air cooler efficiency evaluation according to claim 5
The evaluation methodology of system, it is characterised in that step 2) described in air cooler Average heat transfer differential thermal calculation be to adopt equation below：
If △ is T1/△T2>When 1.7, △ Tm=(△ T1-△T2)/ln(△T1/△T2)；
If △ is T1/△T2When≤1.7, △ Tm=(△ T1+△T2)/2
Wherein △ T1=T '-t2, △ T2=t2-t1, t1And t2For the out temperature of air,
In formula, △ Tm are air cooler heat transfer temperature difference；T ' is tube side inlet temperature DEG C；T " is tube side outlet temperature DEG C；t1Enter for air
Mouth temperature DEG C；t2For air exit temp DEG C；Ln is natural logrithm.
9. the on-line monitoring system for being applied to large-scale petroleum chemical plant installations air cooler efficiency evaluation according to claim 5
The evaluation methodology of system, it is characterised in that step 2) described in air cooler overall heat-transfer coefficient calculate be to adopt equation below：
K=Q/A △ Tm
In formula：Overall heat-transfer coefficients of the K for air cooler, unit：W/m2·℃；Heat exchange areas of the A for air cooler, unit：m2。
10. the on-line monitoring for being applied to large-scale petroleum chemical plant installations air cooler efficiency evaluation according to claim 5
The evaluation methodology of system, it is characterised in that step 2) described in air cooler Energy Efficiency Ratio calculate, it is different to allow for four seasons temperature,
The operational efficiency of same air cooler under different working conditions is also different, and the operational energy efficiency under different operating modes is converted into standard
Efficiency under operating mode, i.e., the ratio of specified heat exchange amount and the electric power input value of tested motor；The standard condition is referred to：Density
ρ0=1.05kg/m3；Pressure P0=101325Pa；t0=20 DEG C；
The efficiency test of air cooler is generally carried out under non-standard working conditions, is carrying out needing when air cooler Energy Efficiency Ratio is calculated
Power of motor consumption is converted into into the power of motor consumption under equal thermic load standard air air inlet operating mode；
The first situation：If air cooler air quantity can not be automatically adjusted, motor power consumption and air inlet absolute temperature are into anti-
Than it is as follows that motor power consumption N increases formula with temperature reduction：
Second situation：If the operation of fan for air cooler, air quantity can be automatically adjusted according to the change of temperature, wherein：
Turn angle fan:
Adjustable speed fan:
In formula：NActual measurementFor the air cooler motor power (output) consumption that electric power measurement apparatus measures are obtained, unit：W；NStandardFor equal heat
Motor power (output) consumption under load standard air air inlet operating mode, unit：The relative power of W, x for blower fan, unit：%,
Described trapped energy theory formula is as follows：
EER=Q/NStandard。
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