CN105371947A - Testing device and testing method of irradiance on surface of thermal absorber - Google Patents
Testing device and testing method of irradiance on surface of thermal absorber Download PDFInfo
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- CN105371947A CN105371947A CN201510861323.4A CN201510861323A CN105371947A CN 105371947 A CN105371947 A CN 105371947A CN 201510861323 A CN201510861323 A CN 201510861323A CN 105371947 A CN105371947 A CN 105371947A
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- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 239000006096 absorbing agent Substances 0.000 title abstract 7
- 230000033001 locomotion Effects 0.000 claims abstract description 13
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 22
- 230000008569 process Effects 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000010998 test method Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 9
- 230000004907 flux Effects 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000005286 illumination Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000010248 power generation Methods 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
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- 230000001681 protective effect Effects 0.000 description 1
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- 239000013077 target material Substances 0.000 description 1
Classifications
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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
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
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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
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
- G01J1/0422—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings using light concentrators, collectors or condensers
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The present invention discloses a testing device of the irradiance on the surface of a thermal absorber. The testing device provided by the invention comprises an aperture, a receiver, a thermopile, a data acquisition module and a control center, and the control center is configured to control the movement of the testing device in a facula area to acquire irradiance values of different positions on the surface of the thermal absorber in a photo-thermal power station. The present invention further provides a testing method of the irradiance on the surface of a thermal absorber. According to the invention, the testing device is disposed in the spotlight area of the photo-thermal power station field, the receiver, having a surface with a coating which has the same material as the surface of the thermal absorber in the photo-thermal power station, is configured to absorb focused sunlight reflected by the photo-thermal power station field, and a thermal electromotive force is formed on the thermopile; and the real irradiance of the position with respect to the surface of the thermal absorber may be accurately measured by only converting the thermal electromotive force to an irradiance value, and the real distribution condition of the irradiances on the surface of the thermal absorber may be accurately reflected through acquisition of each point in the spotlight area, therefore the test is convenient and fast.
Description
Technical field
The present invention relates to solar energy generation technology field, particularly relate to a kind of heat dump surface irradiation degree proving installation and method.
Background technology
In the engineering of solar energy concentration generating, especially in high altitude localities, NORTHWEST CHINA district, wind-resources is often gone with illumination resource, the stability of the condenser of Jing Chang and the heat dump of top of tower is had an impact, need to be grasped the distribution situation of heat dump surface energy flux density under different operating mode, have very large technology and economic implications to the measurement of the energy flux density of optically focused focal position.Theoretical side has occurred that a lot of mathematical model adopts the method for theory calculate or numerical simulation to go to predict the distribution that can flow, and these predictions need the evidence of experiment measuring.The measurement of focusing energy flux density, directly can reflect the energy distribution situation on heat dump surface, to the lifting of ability of Jing Chang design and control technology aspect, there is very large reference value, being the key improving energy utilization efficiency, is the basis of improving solar energy condenser lens field and heat dump efficiency to the meticulous measurement of energy flux density.
Existing method of testing mainly contains the direct method of measurement and the indirect method of measurement, and the direct method of measurement, mainly by after optical sensor is laid in receiving area, utilizes the intensity of optical sensor received radiation to incident light directly to measure; And indirect inspection rule is by laying lambert's target in receiving area, the mode utilizing CCD camera to take lambert's target surface is measured.
When utilizing optical sensor directly to measure, first needing the regional location measured to lay a dull and stereotyped receiving device, there is transportable Miniature optical sensor in the direction of injecting in face of optically focused light on dull and stereotyped receiving device.In the process measured, this sensor scans and accepts incident light on flat board, and coordinate light signal being converted to electric signal and institute's measuring point is transferred to terminal in the lump, by the corresponding relation of the electrical signal intensity in database with energy intensity of flow, the electrical signal data received is converted into energy intensity of flow data, and mate with the position coordinates of measurement point and export, obtain the irradiance distribution in plane to be measured.
This kind of method due to the thermal protective performance of optical sensor more weak, be not too applicable to the tower photo-thermal power generation occasion of high concentration ratio; The wavelength of optical sensor to incident light has certain selectivity, and convert energy flux density to by light signal and have the larger error of middle existence, accuracy is low.
When adopting CCD camera to carry out indirect inspection, the main Optimas analysis software that uses, to shooting image procossing, obtains receiving plane radiation flux figure and irradiance distribution.Because the incident light of lambert's target to all frequencies has same reflectivity, make intensity of reflected light can represent the intensity of incident energy stream, and photograph the linear relation of energy flux density on lambert's target material gray scale and this sheet material face, thus just the half-tone information on focal plane can be converted to corresponding irradiance size.
This kind of CCD camera can only obtain the regional irradiance distribution figure in whole illumination range in conjunction with the method that lambert's target is measured, equipment purchasing cost is higher, within the scope of hot spot, the accuracy of the irradiance value size of any point is lower, the heat dump height of tower photo-thermal power generation is high, difficulty of test is large, and result only has certain reference value.
Summary of the invention
In view of the deficiency that prior art exists, the invention provides a kind of heat dump surface irradiation degree proving installation and the method that accurately can reflect the real irradiance distribution situation in heat dump surface, convenient test.
In order to realize above-mentioned object, present invention employs following technical scheme:
A kind of heat dump surface irradiation degree proving installation, comprising:
Diaphragm, which is provided with the Beam Control mouth that the sunshine after the focusing of reflecting for photo-thermal power station Jing Chang passes;
Receiver, is fixed on the position that the described diaphragm back side is relative with described Beam Control mouth, and its surface is covered with the coating identical with the heat dump surfacing in photo-thermal power station;
Thermoelectric pile, is located on the face of described receiver described diaphragm dorsad, for detecting the temperature on described receiver surface and producing corresponding thermoelectromotive force;
Data acquisition module, is connected to described thermoelectric pile one end, changes irradiance value into for the described thermoelectromotive force exported by described thermoelectric pile and gathers;
Control center, is connected to described data acquisition module one end, for receiving the described irradiance value of described data collecting module collected and showing;
It is mobile with the irradiance value gathering diverse location in spot area that described control center controls proving installation.
Preferably, described data acquisition module is positioned at outside spot area.
Preferably, described data acquisition module comprises signal converter and data collecting card, the described thermoelectromotive force that described signal converter is used for described thermoelectric pile to export changes irradiance value into, the described irradiance value that described data collecting card exports for gathering described signal converter.
Preferably, described signal converter comprises electromotive force/current conversion unit and signal amplifier, the described thermoelectromotive force that described electromotive force/current conversion unit is used for being exported by described thermoelectric pile changes current signal into and passes to described signal amplifier, and described signal amplifier is delivered to described data collecting card after current signal is amplified process.
Preferably, radiating subassembly is arranged with outside described thermoelectric pile.
Preferably, be connected with propulsion plant between described diaphragm and described control center, described propulsion plant moves described diaphragm under the control of described control center in spot area.
Another object of the present invention is to provide a kind of heat dump surface irradiation degree method of testing, use above-mentioned heat dump surface irradiation degree proving installation, comprise the steps:
S01, assembling and testing device the Beam Control mouth of closing on diaphragm;
S02, proving installation to be placed in the light-collecting area of photo-thermal power station Jing Chang, and to make the detected part keeping parallelism of the heat dump in described diaphragm and photo-thermal power station;
S03, mobile test device to assigned address, and open Beam Control mouth;
The irradiance value of S04, the display of observation control center is until reach stable state;
S05, mobile test device are to next assigned address;
Repeat step S04 and S05 until be completed.
Preferably, in test process, the movement of described proving installation is controlled by described control center.
Preferably, the motion track of proving installation is stored in described control center, and after testing an assigned address, described control center controls proving installation and moves to the different assigned address of the next one in described motion track.
By proving installation being placed in the light-collecting area of photo-thermal power station Jing Chang, the receiver utilizing surface to be covered with the coating identical with the heat dump surfacing in photo-thermal power station absorbs the sunshine after the focusing that photo-thermal power station Jing Chang reflects, and thermoelectromotive force is formed on thermoelectric pile, only thermoelectromotive force need be converted to the real irradiance that irradiance value accurately can measure heat dump surface corresponding position, accurately can reflect the real irradiance distribution situation in heat dump surface by carrying out collection to each point in light-collecting area, convenient test is quick.
Accompanying drawing explanation
Fig. 1 is the structural representation of the heat dump surface irradiation degree proving installation 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 transverse axis X in one of them irradiation range of the preferred embodiment of the present invention and the irradiance value scatter chart in vertical axes Y-direction.
Fig. 4 is the irradiance distribution cloud atlas in one of them irradiation range of the preferred embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is described in more detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Consult Fig. 1, heat dump surface irradiation degree proving installation of the present invention, comprise can play interception diaphragm 10, receiver 20, thermoelectric pile 30, data acquisition module 40, control center 50 and propulsion plant 60, diaphragm 10 is provided with the Beam Control mouth that the sunshine after for the focusing of mirror field 1, photo-thermal power station reflection passes; Receiver 20 is fixed on the position relative with Beam Control mouth, diaphragm 10 back side, and its surface is covered with the coating identical with the heat dump surfacing in photo-thermal power station; Thermoelectric pile 30 is located on the face of receiver 20 diaphragm 10 dorsad, for detecting the temperature on receiver 20 surface and producing corresponding thermoelectromotive force; Data acquisition module 40 is connected to thermoelectric pile 30 one end, and the thermoelectromotive force for being exported by thermoelectric pile 30 changes irradiance value into and gathers; Control center 50 is connected to data acquisition module 40 one end, for receiving the irradiance value of data acquisition module 40 collection and showing.
In test process, control center 50 can gather the irradiance value of diverse location by controlling proving installation movement in spot area.Preferred control center 50 is computing machine, and have control, display and analytic function concurrently, propulsion plant 60 is connected between diaphragm 10 and control center 50, and can under the control of the heart 50 in the controlling in spot area mobile whole proving installation.
Preferably, data acquisition module 40 comprises signal converter and data collecting card, and signal converter is used for changing the thermoelectromotive force that thermoelectric pile 30 exports into irradiance value, and data collecting card is used for the irradiance value that collection signal converter exports.Signal converter comprises electromotive force/current conversion unit and signal amplifier, electromotive force/current conversion unit is used for changing the thermoelectromotive force that thermoelectric pile 30 exports into current signal and passes to signal amplifier, and signal amplifier is delivered to data collecting card after current signal is amplified process.
This proving installation is based on photothermal deformation principle, receiver is identical with the process that the heat dump in photo-thermal power station receives irradiance, by receiver surface through identical coating process surperficial with heat dump, the smooth absorption of high-absorbility antiradar reflectivity in full spectral range can be realized, receiver produces thermograde after absorbing light irradiance, thermoelectric pile exports corresponding thermoelectromotive force after detecting value, corresponding irradiance value output display is converted to again through amplifying circuit, the middle conversion do not occurred between photosignal, but the conversion directly realized between energy signal, accurately can reflect the real irradiance distribution in heat dump surface, simple testing process.
For avoiding data acquisition module 40 to be damaged under the high temperature conditions, data acquisition module 40 can be positioned at outside spot area.Proving installation is when testing, and the parts such as diaphragm 10, receiver 20, thermoelectric pile 30, signal transmission cable are positioned at Jing Chang light-collecting area completely, and propulsion plant 60 and signal transmission cable are through insulation.Be arranged with radiating subassembly outside receiver 20, its radiating mode is selected according to the mirror field focusing ratio in photo-thermal power station, usually adopts the mode of fin or water-cooled forced heat radiation to ensure the stability of receiver material.
Propulsion plant 60 preferably adopts the type of drive of motor pushing screw rod successively to advance, and it advances the motion track of track and proving installation, is stored in control center 50 to realize in test process accurately controlling after can programming in advance.
Receiver 20 and the diaphragm 10 of the present embodiment be arranged in parallel, and in test process, diaphragm 10 is parallel all the time with the detected part of the heat dump in photo-thermal power station, Beam Control mouth is the through hole on diaphragm 10 and the cover plate for covering through hole, can regulate the shape and size through light beam by Beam Control mouth.
As Fig. 2, during the test of heat dump surface irradiation degree, in turn include the following steps:
S01, assembling and testing device the Beam Control mouth of closing on diaphragm 10;
S02, proving installation to be placed in the light-collecting area of mirror field, photo-thermal power station 1, and to make the detected part keeping parallelism of diaphragm 10 and the heat dump in photo-thermal power station;
S03, mobile test device to assigned address, and open Beam Control mouth;
The irradiance value that S04, observation control center 50 show is until reach stable state (namely irradiance value no longer significant change occurs);
S05, mobile test device are to next assigned address; Finally, step S04 and S05 is repeated until be completed.
In test process, because the movement of proving installation is controlled by control center 50, and the motion track of proving installation is stored in control center 50, after testing an assigned address, control center 50 controls proving installation and moves to the different assigned address of the next one in motion track, control accuracy and automaticity high.
During concrete test, produce heat after receiver 20 surface receives irradiation, the thermoelectric pile 30 two ends formation temperature being arranged on receiver 20 back side is poor, and thermoelectric pile 30 produces thermoelectromotive force.Irradiance E is larger, and the temperature difference T at thermoelectric pile 30 two ends is larger, and the electromotive force V of output is also larger.Three is linear: V=K × E.Wherein, K is the sensitivity of proving installation, represents after reaching stable state, the ratio of output quantity and input quantity, i.e. the micro voltage size that produces of unit irradiance, and the size of K value is demarcated through the measurement of artificial light source in laboratory.In measuring process, just can know the size of region internal irradiation degree E by measuring the voltage swing exported by inference, being stored in computing machine after irradiance value being gathered by data collecting card.
After having tested, the irradiance value that all assigned addresses in spot area collect can export with the result of excel tabular, can also according to heat dump Coordinate generation heat dump surface irradiation degree distribution curve and corresponding cloud atlas.If Fig. 3 is in diameter 300mm irradiation range, according to 10mm spacing to the irradiance value scatter chart on transverse axis X and vertical axes Y-direction, Fig. 4 is the irradiance distribution cloud atlas in corresponding irradiation range.
By proving installation being placed in the light-collecting area of photo-thermal power station Jing Chang, the receiver utilizing surface to be covered with the coating identical with the heat dump surfacing in photo-thermal power station absorbs the sunshine after the focusing that photo-thermal power station Jing Chang reflects, and thermoelectromotive force is formed on thermoelectric pile, only thermoelectromotive force need be converted to the real irradiance that irradiance value accurately can measure heat dump surface corresponding position, by the movement in spot area of control proving installation, collection is carried out to each point in light-collecting area and accurately can reflect the real irradiance distribution situation in heat dump surface, convenient test is quick, and testing cost is low.Even test also very convenient to the tower photo-thermal power station with high concentration ratio, not by the impact that heat dump positional distance ground is far away, it also avoid and use the wavelength of optical sensor on incident light have selectivity and result through the impact of error on test accuracy that light signal converts energy flux density to.
In addition, screw rod and motor drive the mode combined can realize pointwise irradiance size in irradiation zone and measure, and ensure that automaticity and point position; Adopt the pattern of forced heat radiation, realize the irradiance measurement under high concentration ratio, meet the testing requirement in photo-thermal power station; Owing to can directly generate irradiance Trendline and cloud atlas, improve the visualize degree of experimental data.
The above is only the embodiment of the application; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection domain of the application.
Claims (9)
1. a heat dump surface irradiation degree proving installation, is characterized in that, comprising:
Diaphragm (10), which is provided with the Beam Control mouth that the sunshine after the focusing of reflecting for photo-thermal power station Jing Chang (1) passes;
Receiver (20), is fixed on the position that described diaphragm (10) back side is relative with described Beam Control mouth, and its surface is covered with the coating identical with the heat dump surfacing in photo-thermal power station;
Thermoelectric pile (30), is located on the face of described receiver (20) described diaphragm (10) dorsad, for detecting the temperature on described receiver (20) surface and produce corresponding thermoelectromotive force;
Data acquisition module (40), is connected to described thermoelectric pile (30) one end, changes irradiance value into for the described thermoelectromotive force exported by described thermoelectric pile (30) and gathers;
Control center (50), is connected to described data acquisition module (40) one end, for receiving described irradiance value that described data acquisition module (40) gathers and showing;
It is mobile with the irradiance value gathering diverse location in spot area that described control center (50) controls proving installation.
2. heat dump surface irradiation degree proving installation according to claim 1, it is characterized in that, described data acquisition module (40) is positioned at outside spot area.
3. heat dump surface irradiation degree proving installation according to claim 1, it is characterized in that, described data acquisition module (40) comprises signal converter and data collecting card, described signal converter is used for changing the described thermoelectromotive force that described thermoelectric pile (30) exports into irradiance value, the described irradiance value that described data collecting card exports for gathering described signal converter.
4. heat dump surface irradiation degree proving installation according to claim 3, it is characterized in that, described signal converter comprises electromotive force/current conversion unit and signal amplifier, described electromotive force/current conversion unit is used for changing the described thermoelectromotive force that described thermoelectric pile (30) exports into current signal and passes to described signal amplifier, and described signal amplifier is delivered to described data collecting card after current signal is amplified process.
5. heat dump surface irradiation degree proving installation according to claim 1, it is characterized in that, described receiver is arranged with radiating subassembly outside (20).
6. according to the arbitrary described heat dump surface irradiation degree proving installation of claim 1-5, it is characterized in that, be connected with propulsion plant (60) between described diaphragm (10) and described control center (50), described propulsion plant (60) moves whole proving installation under the control of described control center (50) in spot area.
7. a heat dump surface irradiation degree method of testing, is characterized in that, uses the arbitrary described heat dump surface irradiation degree proving installation of claim 1-6, comprises the steps:
S01, assembling and testing device the Beam Control mouth of closing on diaphragm (10);
S02, proving installation to be placed in the light-collecting area in photo-thermal power station Jing Chang (1), and to make the detected part keeping parallelism of described diaphragm (10) and the heat dump in photo-thermal power station;
S03, mobile test device to assigned address, and open Beam Control mouth;
The irradiance value that S04, observation control center (50) show is until reach stable state;
S05, mobile test device are to next assigned address;
Repeat step S04 and S05 until be completed.
8. heat dump surface irradiation degree method of testing according to claim 7, is characterized in that, in test process, the movement of described proving installation is controlled by described control center (50).
9. heat dump surface irradiation degree method of testing according to claim 8, it is characterized in that, the motion track of proving installation is stored in described control center (50), and after testing an assigned address, described control center (50) controls proving installation and moves to the different assigned address of the next one in described 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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| Application Number | Priority Date | Filing Date | Title |
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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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| CN105371947A true CN105371947A (en) | 2016-03-02 |
| CN105371947B CN105371947B (en) | 2017-10-17 |
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| WO2017092366A1 (en) * | 2015-11-30 | 2017-06-08 | 朱伯秦 | Heat absorber surface irradiance test apparatus and method |
| CN110108326A (en) * | 2019-06-06 | 2019-08-09 | 中国能源建设集团陕西省电力设计院有限公司 | Trapezoidal thermal-arrest light spot energy and Heat flux calculation system and method |
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| 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 |
| 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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| WO2017092366A1 (en) * | 2015-11-30 | 2017-06-08 | 朱伯秦 | Heat absorber surface irradiance test apparatus and method |
| CN110108326A (en) * | 2019-06-06 | 2019-08-09 | 中国能源建设集团陕西省电力设计院有限公司 | Trapezoidal thermal-arrest light spot energy and Heat flux calculation 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 |
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| WO2017092366A1 (en) | 2017-06-08 |
| CN105371947B (en) | 2017-10-17 |
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