CN105371947B - A kind of heat dump surface irradiation degree test device and method - Google Patents
A kind of heat dump surface irradiation degree test device and method Download PDFInfo
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- CN105371947B CN105371947B CN201510861323.4A CN201510861323A CN105371947B CN 105371947 B CN105371947 B CN 105371947B CN 201510861323 A CN201510861323 A CN 201510861323A CN 105371947 B CN105371947 B CN 105371947B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
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Abstract
The invention discloses a kind of heat dump surface irradiation degree test device, including：Diaphragm, receiver, thermoelectric pile, data acquisition module and control centre, control test device movement in spot area to gather the irradiance value of the heat dump surface diverse location in photo-thermal power station by control centre.Present invention also offers a kind of heat dump surface irradiation degree method of testing.The present invention is by the way that test device is placed in photo-thermal power station Jing Chang light-collecting area, the sunshine after the focusing with the receiver absorption photo-thermal power station Jing Chang reflections of the heat dump surfacing identical coating in photo-thermal power station is covered with using surface, and thermoelectromotive force is formed on thermoelectric pile, only thermoelectromotive force need to be converted into irradiance value can accurately measure the real irradiation level of heat dump surface corresponding position, the real irradiance distribution situation in heat dump surface can accurately be reflected by being acquired to each point in light-collecting area, convenient test is quick.
Description
Technical field
The present invention relates to solar energy generation technology field, more particularly to a kind of heat dump surface irradiation degree test device and side
Method.
Background technology
In the engineering of solar energy concentration generating, especially in NORTHWEST CHINA area high altitude localities, wind-resources often with
Illumination resource is gone with, and the stability of the heat dump of condenser and top of tower on Jing Chang produces influence, it is necessary to grasp heat dump table
Distribution situation of the face energy-flux density under different operating modes, have to the measurement of the energy-flux density of optically focused focal position very big technology and
Economic implications.Has there are many mathematical modelings and has gone what prediction can flow using the method for theoretical calculation or numerical simulation in theoretical side
Distribution, and these predictions need to test the evidence of measurement.The measurement of focusing energy-flux density, can directly reflect heat dump surface
Energy distribution situation, has very big reference value to the lifting of the ability in terms of Jing Chang designs and control technology, is to improve energy
The key of utilization ratio is measured, the fine measurement to energy-flux density is to improve solar energy condenser lens field and the basis of heat dump efficiency.
Existing method of testing mainly has the direct method of measurement and the indirect method of measurement, and the direct method of measurement is mainly by receiving
Region is laid after optical sensor, and receive radiation using optical sensor directly measures to the intensity of incident light；And it is indirect
Measurement rule is that, by laying lambert's target in receiving area, the mode for shooting lambert's target surface using CCD camera is measured.
Using optical sensor carry out direct measurement when, first need measure regional location lay a board joint by
There is transportable miniature optical sensor in face of the injection direction of optically focused light on device, flat board receiving device.In the mistake of measurement
Cheng Zhong, the sensor is scanned on flat board receives incident light, and converts optical signals to the coordinate of electric signal and institute's measuring point in the lump
Terminal is transferred to, by the electrical signal intensity in database and the corresponding relation of energy intensity of flow, by the telecommunications received
Number is converted into energy intensity of flow data, and matches output with the position coordinates of measurement point, obtains the irradiation level in plane to be measured
Distribution.
Such a method is weaker due to the thermal protective performance of optical sensor, is poorly suitable for the tower photo-thermal hair of high concentration ratio
Electric field is closed；Optical sensor has certain selectivity to the wavelength of incident light, is converted into by optical signal during energy-flux density has
Between there is larger error, accuracy is low.
It is main that shooting image is handled with Optimas analysis softwares when being measured indirectly using CCD camera, obtain
Receiving plane radiation flux figure and irradiance distribution.Because lambert's target has same reflectivity to the incident light of all frequencies, make
The intensity of incident energy stream can be represented by obtaining intensity of reflected light, and photograph lambert's target material gray scale and energy-flux density on the sheet side
Wired sexual intercourse, so that the half-tone information on focal plane can be just converted into corresponding irradiation level size.
The method of such a CCD camera combination lambert target measurement can only obtain the regional irradiation level point in whole illumination range
Butut, equipment purchasing cost is higher, and the accuracy of the irradiance value size at any point is relatively low in the range of hot spot, tower photo-thermal hair
The heat dump height of electricity is high, and difficulty of test is big, as a result only has certain reference value.
The content of the invention
In view of the deficiency that prior art is present, can accurately reflect the real spoke in heat dump surface the invention provides one kind
Illumination Distribution situation, the heat dump surface irradiation degree test device of convenient test and method.
In order to realize above-mentioned purpose, present invention employs following technical scheme：
A kind of heat dump surface irradiation degree test device, including：
Diaphragm, which is provided with the Beam Control mouthful that the sunshine after the focusing for photo-thermal power station Jing Chang reflections is passed through；
Receiver, is fixed on the diaphragm back side position relative with the Beam Control mouthful, its surface is covered with and photo-thermal
Heat dump surfacing identical coating in power station；
Thermoelectric pile, on the receiver dorsad face of the diaphragm, enters for the temperature to the receiver surface
Row detects and produces corresponding thermoelectromotive force；
Data acquisition module, is connected to described thermoelectric pile one end, and the temperature difference for the thermoelectric pile to be exported is electronic
Gesture is changed into irradiance value and is acquired；
Control centre, is connected to described data acquisition module one end, the institute for receiving the data collecting module collected
State irradiance value and shown；
The control centre controls test device to move to gather the irradiance value of diverse location in spot area.
Preferably, the data acquisition module is located at outside spot area.
Preferably, the data acquisition module includes signal adapter and data collecting card, and the signal adapter is used for
The thermoelectromotive force that the thermoelectric pile is exported is changed into irradiance value, and the data collecting card is used to gather the signal
The irradiance value of converter output.
Preferably, the signal adapter includes potential/current conversion unit and signal amplifier, the potential/electric current
Converting unit is used to the thermoelectromotive force that exports the thermoelectric pile and is changed into current signal passing to the signal amplification
Device, the signal amplifier will be delivered to the data collecting card after current signal enhanced processing.
Preferably, the thermoelectric pile periphery is provided with radiating subassembly.
Preferably, propulsion plant is connected between the diaphragm and the control centre, the propulsion plant is in the control
The diaphragm is moved under the control at center processed in spot area.
Another object of the present invention is to provide a kind of heat dump surface irradiation degree method of testing, above-mentioned heat dump is used
Surface irradiation degree test device, comprises the following steps：
S01, assembling and testing device simultaneously close the Beam Control on diaphragm mouthful；
S02, test device is placed in photo-thermal power station Jing Chang light-collecting area, and make the diaphragm with photo-thermal power station
Heat dump detected part keeping parallelism；
S03, mobile test device open Beam Control mouthful to specified location；
The irradiance value that S04, observation control centre show is until reach stable state；
S05, mobile test device are to next specified location；
Repeat step S04 and S05 is until be completed.
Preferably, in test process, the movement of the test device is controlled by the control centre.
Preferably, the motion track of test device is stored in the control centre, after a specified location has been tested
Next different specified location that control centre's control test device is moved in the motion track.
By the way that test device is placed in photo-thermal power station Jing Chang light-collecting area, using surface be covered with photo-thermal power station
The receiver of heat dump surfacing identical coating absorb the sunshine after the focusing of photo-thermal power station Jing Chang reflection, and in heat
Thermoelectromotive force is formed on pile, thermoelectromotive force need to be only converted into irradiance value can accurately measure heat dump surface correspondence
The real irradiation level at position, can accurately reflect that heat dump surface is true by being acquired to each point in light-collecting area
Irradiance distribution situation, convenient test is quick.
Brief description of the drawings
Fig. 1 is the structural representation of the heat dump surface irradiation degree test device of the preferred embodiment of the present invention.
Fig. 2 is the schematic diagram of the heat dump surface irradiation degree method of testing of the preferred embodiment of the present invention.
Fig. 3 is the spoke on the trunnion axis X and vertical axes Y-direction in one of irradiation range of the preferred embodiment of the present invention
Brightness value scatter chart.
Fig. 4 is the irradiance distribution cloud atlas in one of irradiation range of the preferred embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and without
It is of the invention in limiting.
Refering to Fig. 1, heat dump surface irradiation degree test device of the invention, including the diaphragm 10 of interception can be played, connect
Device 20, thermoelectric pile 30, data acquisition module 40, control centre 50 and propulsion plant 60 are received, diaphragm 10 is provided with for photo-thermal power station
The Beam Control mouthful that sunshine after the focusing of the reflection of mirror 1 is passed through；Receiver 20 is fixed on the back side of diaphragm 10 and Beam Control
The relative position of mouth, its surface is covered with and the heat dump surfacing identical coating in photo-thermal power station；Thermoelectric pile 30 is located at and connect
Device 20 is received dorsad on the face of diaphragm 10, is detected for the temperature to the surface of receiver 20 and to produce the corresponding temperature difference electronic
Gesture；Data acquisition module 40 is connected to the one end of thermoelectric pile 30, and the thermoelectromotive force for thermoelectric pile 30 to be exported is changed into irradiation
Angle value is simultaneously acquired；Control centre 50 is connected to the one end of data acquisition module 40, is gathered for receiving data acquisition module 40
Irradiance value and shown.
In test process, control centre 50 is by controlling test device movement in spot area to gather different positions
The irradiance value put.It is preferred that control centre 50 is computer, control, display and analytic function are had concurrently, propulsion plant 60 is connected to
Between diaphragm 10 and control centre 50, and whole test device can be moved in spot area under the control of control centre 50.
Preferably, data acquisition module 40 includes signal adapter and data collecting card, and signal adapter is used for thermoelectricity
The thermoelectromotive force that heap 30 is exported is changed into irradiance value, and data collecting card is used for the irradiation level for gathering signal adapter output
Value.Signal adapter includes potential/current conversion unit and signal amplifier, and potential/current conversion unit is used for thermoelectric pile
The thermoelectromotive forces of 30 outputs are changed into current signal and pass to signal amplifier, and signal amplifier is by current signal enhanced processing
After be delivered to data collecting card.
This test device is based on photothermal deformation principle, and the heat dump in receiver and photo-thermal power station receives the mistake of irradiation level
Cheng Xiangtong, passes through coating treatment identical with heat dump surface by receiver surface, high-absorbility in full spectral region can be achieved low
The flat absorption of reflectivity, receiver, which absorbs, produces thermograde after light irradiance, thermoelectric pile, which is detected, exports corresponding after value
Thermoelectromotive force, then amplified circuit conversion, into corresponding irradiance value output display, centre is occurred without between photosignal
Conversion, but the conversion between being directly realized by energy signal, can accurately reflect the real irradiance distribution in heat dump surface, survey
Examination process is easy.
To avoid data acquisition module 40 from being damaged under the high temperature conditions, data acquisition module 40 can be located at facular area
It is overseas.Test device is in test, and the part such as diaphragm 10, receiver 20, thermoelectric pile 30, signal transmission cable is fully located at Jing Chang
In light-collecting area, propulsion plant 60 and signal transmission cable pass through insulation.The periphery of receiver 20 is provided with radiating subassembly, and it dissipates
Hot mode is selected according to the mirror focusing ratio in photo-thermal power station, generally ensures receiver by the way of fin or water cooling forced heat radiation
The stability of material.
The type of drive that propulsion plant 60 is preferred to use motor pushing screw rod is gradually promoted, and it promotes track to be test device
Motion track, be stored in control centre 50 to realize accurate control in test process after can programming in advance.
The receiver 20 of the present embodiment be arranged in parallel with diaphragm 10, and in test process, in diaphragm 10 and photo-thermal power station
Heat dump detected part it is parallel all the time, Beam Control mouthful is the through hole on diaphragm 10 and the cover plate for covering through hole, is led to
The shape and size through light beam can be adjusted by crossing Beam Control mouth.
Such as Fig. 2, when heat dump surface irradiation degree is tested, in turn include the following steps：
S01, assembling and testing device simultaneously close the Beam Control on diaphragm 10 mouthful；
S02, test device is placed in the light-collecting area of photo-thermal power station mirror 1, and make diaphragm 10 with photo-thermal power station
Heat dump detected part keeping parallelism；
S03, mobile test device open Beam Control mouthful to specified location；
The irradiance value that S04, observation control centre 50 show is until reach that (i.e. obvious change no longer occurs stable state for irradiance value
Change)；
S05, mobile test device are to next specified location；Finally, repeat step S04 and S05 is until be completed.
In test process, because the movement of test device is controlled by control centre 50, and the motion track of test device
It is stored in control centre 50, the control test device of control centre 50 is moved to motion track after a specified location has been tested
In next different specified location, control accuracy and automaticity are high.
During specific test, the surface of receiver 20 produces heat after receiving irradiation, the thermoelectric pile installed in the back side of receiver 20
30 two ends form temperature difference, and thermoelectromotive force is produced on thermoelectric pile 30.Irradiation level E is bigger, the temperature difference T at the two ends of thermoelectric pile 30
Bigger, the electromotive force V of output is also bigger.Three is linear：V=K × E.Wherein, K is the sensitivity of test device,
Expression reached after stable state, the ratio between output quantity and input quantity, i.e., the micro voltage size that unit irradiation level is produced, the sizes of K values be
Demarcated in laboratory by the measurement of artificial light source.In measurement process, area can just be deduced by the voltage swing for measuring output
Domain internal irradiation degree E size, by data collecting card irradiance value is acquired after store to computer.
After the completion of test, the irradiance value that all specified locations in spot area are collected can be with excel tabulars
Result output, can also be according to heat dump Coordinate generation heat dump surface irradiation degree distribution curve and corresponding cloud atlas.Such as Fig. 3
For in diameter 300mm irradiation ranges, according to 10mm spacing to the irradiance value distribution curve on trunnion axis X and vertical axes Y-direction
Figure, Fig. 4 is the irradiance distribution cloud atlas in corresponding irradiation range.
By the way that test device is placed in photo-thermal power station Jing Chang light-collecting area, using surface be covered with photo-thermal power station
The receiver of heat dump surfacing identical coating absorb the sunshine after the focusing of photo-thermal power station Jing Chang reflection, and in heat
Thermoelectromotive force is formed on pile, thermoelectromotive force need to be only converted into irradiance value can accurately measure heat dump surface correspondence
The real irradiation level at position, by controlling test device movement in spot area to be acquired each point in light-collecting area
The real irradiance distribution situation in heat dump surface can accurately be reflected, convenient test is quick, and testing cost is low.Even
Test is carried out to the tower photo-thermal power station with high concentration ratio to be convenient to, not by the remote shadow in heat dump positional distance ground
Ring, it also avoid that there is selectivity to the wavelength of incident light and cause to be converted into energy-flux density by optical signal using optical sensor
Influence of the error to test accuracy.
In addition, screw rod drives the mode being combined to realize that pointwise irradiation level size is measured in irradiation zone, is protected with motor
Automaticity and point position are demonstrate,proved；Using the pattern of forced heat radiation, the irradiance measurement under high concentration ratio is realized, light is met
The testing requirement of thermo-power station；Due to irradiation level Trendline and cloud atlas can be directly generated, the directly perceivedization degree of experimental data is improved.
Described above is only the embodiment of the application, it is noted that for the ordinary skill people of the art
For member, on the premise of the application principle is not departed from, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as the protection domain of the application.
Claims (9)
1. a kind of heat dump surface irradiation degree test device, it is characterised in that including：
Diaphragm (10), which is provided with the Beam Control mouthful that the sunshine after the focusing for photo-thermal power station Jing Chang (1) reflections is passed through；
Receiver (20), is fixed on the diaphragm (10) back side and the Beam Control mouthful relative position, its surface be covered with
Heat dump surfacing identical coating in photo-thermal power station；
Thermoelectric pile (30), on the receiver (20) the dorsad face of the diaphragm (10), for the receiver (20)
The temperature on surface is detected and produces corresponding thermoelectromotive force；
Data acquisition module (40), is connected to the thermoelectric pile (30) one end, for by the thermoelectric pile (30) export it is described
Thermoelectromotive force is changed into irradiance value and is acquired；
Control centre (50), is connected to the data acquisition module (40) one end, for receiving the data acquisition module (40)
The irradiance value of collection is simultaneously shown；
The control centre (50) controls test device to move to gather the irradiance value of diverse location in spot area.
2. heat dump surface irradiation degree test device according to claim 1, it is characterised in that the data acquisition module
(40) it is located at outside spot area.
3. heat dump surface irradiation degree test device according to claim 1, it is characterised in that the data acquisition module
(40) signal adapter and data collecting card are included, the signal adapter is used for the temperature for exporting the thermoelectric pile (30)
Poor electromotive force is changed into irradiance value, and the data collecting card is used for the irradiation level for gathering the signal adapter output
Value.
4. heat dump surface irradiation degree test device according to claim 3, it is characterised in that the signal adapter bag
Potential/current conversion unit and signal amplifier are included, the potential/current conversion unit is used to export the thermoelectric pile (30)
The thermoelectromotive force be changed into current signal and pass to the signal amplifier, the signal amplifier puts current signal
The data collecting card is delivered to after big processing.
5. heat dump surface irradiation degree test device according to claim 1, it is characterised in that the receiver (20) is outside
Enclose provided with radiating subassembly.
6. according to any described heat dump surface irradiation degree test devices of claim 1-5, it is characterised in that the diaphragm
(10) propulsion plant (60) is connected between the control centre (50), the propulsion plant (60) is in the control centre
(50) whole test device is moved under control in spot area.
7. a kind of heat dump surface irradiation degree method of testing, it is characterised in that usage right requires any described heat dumps of 1-6
Surface irradiation degree test device, comprises the following steps：
S01, assembling and testing device simultaneously close the Beam Control on diaphragm (10) mouthful；
S02, test device is placed in photo-thermal power station Jing Chang (1) light-collecting area, and makes the diaphragm (10) and photo-thermal electricity
The detected part keeping parallelism of heat dump in standing；
S03, mobile test device open Beam Control mouthful to specified location；
S04, the irradiance value of observation control centre (50) display are until reach stable state；
S05, mobile test device are to next specified location；
Repeat step S04 and S05 is until be completed.
8. heat dump surface irradiation degree method of testing according to claim 7, it is characterised in that in test process, institute
The movement for stating test device is controlled by the control centre (50).
9. heat dump surface irradiation degree method of testing according to claim 8, it is characterised in that the moving rail of test device
Mark is stored in the control centre (50), control centre (50) the control test device after a specified location has been tested
The next different specified location being moved in the motion track.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510861323.4A CN105371947B (en) | 2015-11-30 | 2015-11-30 | A kind of heat dump surface irradiation degree test device and method |
| PCT/CN2016/089968 WO2017092366A1 (en) | 2015-11-30 | 2016-07-14 | Heat absorber surface irradiance test apparatus and method |
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| CN201510861323.4A CN105371947B (en) | 2015-11-30 | 2015-11-30 | A kind of heat dump surface irradiation degree test device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105371947B (en) * | 2015-11-30 | 2017-10-17 | 黄河水电光伏产业技术有限公司 | A kind of heat dump surface irradiation degree test device and method |
| CN110108050B (en) * | 2019-06-06 | 2023-11-21 | 中国能源建设集团陕西省电力设计院有限公司 | Parabolic heat collection light spot energy and heat flux density measurement system and method |
| CN110108326B (en) * | 2019-06-06 | 2023-10-10 | 中国能源建设集团陕西省电力设计院有限公司 | Trapezoidal heat collection light spot energy and heat flux density measurement system and method |
| CN110108186B (en) * | 2019-06-06 | 2024-02-20 | 中国能源建设集团陕西省电力设计院有限公司 | System and method for measuring spot diameter of solar mirror field |
| CN112880816B (en) * | 2021-01-21 | 2022-09-23 | 内蒙古工业大学 | Linear Fresnel energy flow density test system |
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| CN202631108U (en) * | 2012-05-22 | 2012-12-26 | 河海大学常州校区 | Irradiance and temperature monitoring system for photovoltaic assembly |
| CN205262604U (en) * | 2015-11-30 | 2016-05-25 | 黄河水电光伏产业技术有限公司 | Heat absorber surface irradiation degree testing arrangement |
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| WO2017092366A1 (en) | 2017-06-08 |
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