CN108645060B - Solar high-temperature heat absorber with three-layer mixed gradient structure - Google Patents
Solar high-temperature heat absorber with three-layer mixed gradient structure Download PDFInfo
- Publication number
- CN108645060B CN108645060B CN201810386665.9A CN201810386665A CN108645060B CN 108645060 B CN108645060 B CN 108645060B CN 201810386665 A CN201810386665 A CN 201810386665A CN 108645060 B CN108645060 B CN 108645060B
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- quartz glass
- tube bundle
- glass tube
- temperature heat
- heat absorber
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 75
- 238000009825 accumulation Methods 0.000 claims abstract description 15
- 239000000919 ceramic Substances 0.000 claims abstract description 15
- 238000010521 absorption reaction Methods 0.000 claims abstract description 9
- 229910052709 silver Inorganic materials 0.000 claims abstract description 4
- 239000004332 silver Substances 0.000 claims abstract description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The invention discloses a solar high-temperature heat absorber with a three-layer mixed gradient structure, which comprises a working medium inlet, wherein a sunlight gathering window is arranged at the working medium inlet; the quartz glass layer comprises a quartz glass tube bundle, one end of the quartz glass tube bundle is connected with the working medium inlet, the other end of the quartz glass tube bundle is connected with a quartz glass ball accumulation area, and the quartz glass ball accumulation area is connected with a foamed ceramic heat absorption area; and the quartz glass tube bundle and the quartz glass ball accumulation area are sleeved with a quartz glass sleeve, and the outer side surface of the quartz glass sleeve is plated with silver to form the quartz glass sleeve reflector.
Description
Technical Field
The invention belongs to the field of solar high-temperature heat absorption equipment, and particularly relates to a solar high-temperature heat absorber with a three-layer mixed gradient structure.
Background
The solar high-temperature volumetric heat absorption is the development direction of light high-efficiency solar heat conversion technology, and has important application prospects in the fields of solar thermal power generation, thermochemical hydrogen production and the like.
The concentrated solar energy flow has the defects of uneven density distribution and large incident direction angle, so that speckles appear in the solar energy high-temperature heat conversion process, the temperature of a central area is too high, and the solar energy high-temperature heat conversion efficiency and the safety and the stability of the system are influenced. The invention provides a solar high-temperature heat absorber with a three-layer mixed gradient structure of a quartz glass tube bundle, quartz glass balls and foam silicon carbide, which realizes uniform heat transfer in a porous medium high-temperature section and improves heat exchange efficiency and system safety and reliability.
In the existing solar porous medium scheme, one or more of various characteristics such as concentration solar energy flow density distribution, large-angle direction distribution, working medium convective heat transfer characteristics, incident solar energy flow and self thermal radiation of a porous medium framework are designed only in consideration, and all characteristics are not comprehensively considered, so that the designed porous medium heat absorber scheme is not optimal.
Disclosure of Invention
The invention optimally designs a porous medium heat absorber with a three-layer mixed gradient structure consisting of a quartz glass tube bundle, quartz glass balls and a foamed ceramic porous medium in consideration of comprehensive characteristics of high density distribution peak value, uneven distribution, large-angle incidence, different incident solar energy flow and self thermal radiation spectrum, direction and density distribution of a porous medium framework, and provides technical reference for realizing efficient solar heat exchange.
The invention is realized by the following technical scheme:
a solar high-temperature heat absorber with a three-layer mixed gradient structure comprises a working medium inlet, wherein a concentrated sunlight window is arranged at the working medium inlet;
the quartz glass layer comprises a quartz glass tube bundle, one end of the quartz glass tube bundle is connected with the working medium inlet, the other end of the quartz glass tube bundle is connected with a quartz glass ball accumulation area, and the quartz glass ball accumulation area is connected with a foamed ceramic heat absorption area; and the quartz glass tube bundle and the quartz glass ball accumulation area are sleeved with a quartz glass sleeve, and the outer side surface of the quartz glass sleeve is plated with silver to form the quartz glass sleeve reflector.
In a further improvement, the radius of the quartz glass sleeve reflector is 1-2 times of the radius of the sunlight gathering window, the height of the reflector is 5-8 times of the radius of the sunlight entrance, and the wall thickness of the reflector is 0.5-0.8 cm.
Further improved, the inner radius of the quartz glass tube in the quartz glass tube bundle is 0.3 cm-0.8 cm, and the wall thickness is 0.5 cm-0.8 cm.
The further improvement is that the radius of the small quartz glass balls in the quartz glass ball accumulation area is 0.5 cm-0.8 cm, and the length of the quartz glass ball accumulation area is 0.1-0.2 times of the length of the quartz glass tube bundle.
Further improved, the foamed ceramic in the foamed ceramic heat absorption zone is foamed silicon carbide or foamed aluminum oxide, and the pore diameter is 0.5-0.8 mm.
Compared with the prior art, the invention has the following advantages:
the solar high-temperature heat absorber with the three-layer mixed gradient structure is optimally designed by comprehensive consideration according to the fact that the concentrated solar heat flow density distribution peak value is high, the incident solar flow is incident at a large angle, the incident solar flow is different from the self thermal radiation spectrum, the direction and the density distribution of a porous medium framework, and each layer has a special effect. Its advantages are as follows:
1) the middle glass tube bundle ensures that the incident solar energy flow is transmitted forwards, and simultaneously working media are uniformly distributed along the section.
2) The glass piled small balls reflect high-density energy flow in the central area to the periphery by utilizing the characteristic of large curved surfaces of the small balls, so that the solar energy flow density reaching the foamed ceramic is uniformly distributed along the radius of the section.
3) The quartz glass sleeve reflector reflects the large-angle incident solar energy flow to continue to be transmitted forwards, so that the large-angle energy flow is prevented from being absorbed by the wall surface of the heat absorber, and the heat dissipation loss is increased.
4) The foamed ceramic at the rear end is the real solar radiation energy absorption area and is also a heat exchange high-temperature area. However, the infrared radiation energy of the high-temperature area is absorbed by the quartz glass stacking balls and the quartz glass tube bundles, and finally, the energy dissipated from the quartz window is little, so that the heat efficiency is high.
Drawings
FIG. 1 is a schematic view of example 1.
Detailed Description
In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention comprehensible, the present invention is further explained with reference to examples, and it should be noted that all examples listed herein are only illustrative and are not meant to limit the scope of the present invention.
Example 1:
as shown in figure 1, the invention provides a solar high-temperature heat absorber with a three-layer mixed gradient structure, which comprises a working medium inlet 1 and a working medium outlet 4, wherein a concentrated sunlight window 2 is arranged at the working medium inlet 1. Along the incident and transmission direction of sunlight, quartz glass beams 5, quartz glass spheres 6 and a foamed ceramic layer 3 are respectively arranged. A quartz glass sleeve 7 is arranged outside the quartz glass light beam 5 and the quartz glass ball 6, and the outer side surface of the quartz glass sleeve 7 is plated with silver to form a quartz glass sleeve reflector.
The transmission process of the gathered sunlight in the heat absorber is that the outside incident gathered sunlight penetrates through the quartz glass, enters the quartz glass tube bundle, and continues to be transmitted forwards to reach the surface of the quartz glass accumulation ball through the reflection and refraction of the quartz glass tube bundle. Because the radian of the curved surface of the quartz glass ball is large and the reflection angle is large, the high-density solar radiation energy in the central area is reflected to the periphery of the glass accumulation small ball, so that the density distribution of the incident solar energy flow reaching the surface of the foamed ceramic is uniform, the temperature of the central area of the foamed ceramic is reduced, local high-temperature ablation is avoided, and the thermal efficiency is improved. The quartz glass sleeve reflector on the outermost side reflects sunlight incident at a large angle to the central area, and the sunlight is continuously transmitted forwards and enters the foamed ceramic high-temperature heat absorption area, so that the utilization efficiency of the solar energy flow incident at the large angle is improved.
The radius of the quartz glass sleeve reflector is 1-2 times of the sunlight inlet radius, the height of the cylinder is 5-8 times of the sunlight inlet radius, and the wall thickness is 0.5-0.8 cm. The inner radius of the quartz glass tube bundle is 0.3 cm-0.8 cm, the wall thickness is 0.5 cm-0.8 cm. The radius of the small quartz glass ball is 0.5 cm-0.8 cm, and the thickness of the small quartz glass ball is 0.1-0.2 times of that of the quartz glass tube bundle. The foamed ceramic is selected from foamed silicon carbide or foamed aluminum oxide and the like, and the diameter of a pore is 0.5-0.8 mm.
Claims (4)
1. A solar high-temperature heat absorber with a three-layer mixed gradient structure comprises a working medium inlet, wherein a concentrated sunlight window is arranged at the working medium inlet;
the quartz glass layer comprises a quartz glass tube bundle, one end of the quartz glass tube bundle is connected with the working medium inlet, the other end of the quartz glass tube bundle is connected with a quartz glass ball accumulation area, and the quartz glass ball accumulation area is connected with a foamed ceramic heat absorption area; the quartz glass tube bundle and the quartz glass ball accumulation area are sleeved with a quartz glass sleeve, and the outer side surface of the quartz glass sleeve is plated with silver to form a quartz glass sleeve reflector;
the radius of the quartz glass sleeve is 1-2 times of the radius of a sunlight gathering window, the height of the quartz glass sleeve is 5-8 times of the radius of a sunlight inlet, and the wall thickness of the quartz glass sleeve is 0.5-0.8 cm.
2. The solar high-temperature heat absorber with a three-layer mixed gradient structure according to claim 1, wherein the inner radius of the quartz glass tubes in the quartz glass tube bundle is 0.3 cm-0.8 cm, and the wall thickness is 0.5 cm-0.8 cm.
3. The solar high-temperature heat absorber with the three-layer mixed gradient structure according to claim 1, wherein the radius of the small quartz glass spheres in the quartz glass sphere accumulation area is 0.5 cm-0.8 cm, and the length of the quartz glass sphere accumulation area is 0.1-0.2 times of the length of the quartz glass tube bundle.
4. The solar high-temperature heat absorber with a three-layer mixed gradient structure as in claim 1, wherein the foamed ceramic in the foamed ceramic heat absorption zone is foamed silicon carbide or foamed aluminum oxide, and the pore diameter is 0.5-0.8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810386665.9A CN108645060B (en) | 2018-04-26 | 2018-04-26 | Solar high-temperature heat absorber with three-layer mixed gradient structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810386665.9A CN108645060B (en) | 2018-04-26 | 2018-04-26 | Solar high-temperature heat absorber with three-layer mixed gradient structure |
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| Publication Number | Publication Date |
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| CN108645060A CN108645060A (en) | 2018-10-12 |
| CN108645060B true CN108645060B (en) | 2020-09-22 |
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| CN201810386665.9A Expired - Fee Related CN108645060B (en) | 2018-04-26 | 2018-04-26 | Solar high-temperature heat absorber with three-layer mixed gradient structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109812984A (en) * | 2018-12-29 | 2019-05-28 | 南京航空航天大学 | A kind of solar porous medium heat dump with volume effect |
| CN109780739B (en) * | 2019-01-31 | 2020-06-23 | 哈尔滨工业大学 | Stepped gap type solar porous heat absorber containing quartz foam |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1821679A (en) * | 2006-03-28 | 2006-08-23 | 张耀明 | Hollow chamber type solar energy receiver |
| CN101122425A (en) * | 2007-05-10 | 2008-02-13 | 中国科学院电工研究所 | Silicon carbide foam ceramic solar energy air heat-absorbing device |
| CN103148602A (en) * | 2013-02-01 | 2013-06-12 | 中国科学院电工研究所 | Solid particle accumulation bed-type air heat absorber for solar thermal power station |
| CN203928436U (en) * | 2014-07-01 | 2014-11-05 | 福建工程学院 | The solar heat absorber that a kind of Absorption of Medium coefficient gradients increases |
| CN106440418A (en) * | 2016-12-07 | 2017-02-22 | 福建工程学院 | Glass tube bundle and porous medium composite structure solar absorber |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5275156A (en) * | 1992-07-13 | 1994-01-04 | Nova Design Partners, L.P. | Reusable heat releasing pack |
| CN2379757Y (en) * | 1999-06-30 | 2000-05-24 | 陆惠民 | All weather solar energy water heater |
| CN202770031U (en) * | 2012-09-27 | 2013-03-06 | 长沙有色冶金设计研究院有限公司 | Transparent heat-insulation device of solar pond |
| ES2597981B1 (en) * | 2015-07-22 | 2017-11-06 | Fº JAVIER PORRAS VILA | Solar concentrator with hemispheres |
| CN106610138A (en) * | 2015-10-21 | 2017-05-03 | 徐建宁 | Matrix heat collecting panel |
| CN107543325A (en) * | 2016-06-29 | 2018-01-05 | 曾澳华 | A kind of small-sized solar cooker |
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- 2018-04-26 CN CN201810386665.9A patent/CN108645060B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1821679A (en) * | 2006-03-28 | 2006-08-23 | 张耀明 | Hollow chamber type solar energy receiver |
| CN101122425A (en) * | 2007-05-10 | 2008-02-13 | 中国科学院电工研究所 | Silicon carbide foam ceramic solar energy air heat-absorbing device |
| CN103148602A (en) * | 2013-02-01 | 2013-06-12 | 中国科学院电工研究所 | Solid particle accumulation bed-type air heat absorber for solar thermal power station |
| CN203928436U (en) * | 2014-07-01 | 2014-11-05 | 福建工程学院 | The solar heat absorber that a kind of Absorption of Medium coefficient gradients increases |
| CN106440418A (en) * | 2016-12-07 | 2017-02-22 | 福建工程学院 | Glass tube bundle and porous medium composite structure solar absorber |
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| CN108645060A (en) | 2018-10-12 |
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Granted publication date: 20200922 |