CN202453526U - Compound paraboloidal secondary mirror for solar thermal electricity generation - Google Patents
Compound paraboloidal secondary mirror for solar thermal electricity generation Download PDFInfo
- Publication number
- CN202453526U CN202453526U CN2012200828719U CN201220082871U CN202453526U CN 202453526 U CN202453526 U CN 202453526U CN 2012200828719 U CN2012200828719 U CN 2012200828719U CN 201220082871 U CN201220082871 U CN 201220082871U CN 202453526 U CN202453526 U CN 202453526U
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- Prior art keywords
- composite parabolic
- secondary reflection
- reflection mirror
- secondary mirror
- compound
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Abstract
The utility model relates to a compound paraboloidal secondary mirror for solar thermal electricity generation. The compound paraboloidal secondary mirror comprises a glass sheet which is bent into a compound paraboloid shape. The outer surface of the glass sheet is plated with a reflecting film, and the inner surface of the glass sheet is a reflective surface. Compared with the prior art, the compound paraboloidal secondary mirror adopts the glass sheet with low price as a reflective mirror surface and has the advantages of high uniformity, high reflectivity, good stability, good firmness, long service life, lower cost, simpleness in operation, friendly environment and the like.
Description
Technical field
The utility model belongs to solar energy heat utilization technical field, is specifically related to a kind of solar energy thermal-power-generating with composite parabolic secondary reflection mirror.
Background technology
The extensively a large amount of of growing energy-consuming, particularly fossil fuel such as coal, oil use, and to the tremendous influence that environment and global climate bring, make human target of sustainable development face severe threat.How to realize that sustainable development is the common theme that current international community is inquired into.For this reason, human begun to seek and make great efforts to develop new substitute energy, for the progress of human society provides sustainable development power.
Sun power is a kind of very regenerative resource of cleaning, the energy that its per second the arrives ground 5,000,000 tons of heats that standard coal equivalent produced that are equivalent to burn.And it is constant in 10,000,000,000 years, can be similar to maintenance according to the radiation output of estimating the sun, we can say that sun power is inexhaustible, nexhaustible fully green energy resource.Estimate according to International Energy Agency, to the year two thousand fifty the solar electrical energy generation proportion that accounts for global electric power supply will reach more than 25%.
Composite parabolic secondary reflection mirror is a line focus formula solar thermal collection system core ingredient; It mainly acts on is that sunshine to focusing on through the primary event mirror carries out secondary focusing; Further improve the optically focused ratio, make the optically focused ratio of line focus formula solar thermal collection system can reach 50～100.Significantly improved the mirror field efficient of line focus formula solar thermal collection system simultaneously.
Existing composite parabolic secondary reflection mirror adopts the specular aluminium that is easy to moulding, mirror face stainless steel etc., and the reflection efficiency of these catoptrons is low, and manufacturing cost is high.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the purpose of the utility model is to provide a kind of solar energy thermal-power-generating with composite parabolic secondary reflection mirror, adopts the simple glass sheet, and reflection efficiency is high, low cost of manufacture.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of solar energy thermal-power-generating comprises the original sheet glass 1 that bends to the composite parabolic shape with composite parabolic secondary reflection mirror, and the outside of original sheet glass 1 is coated with reflectance coating 2, and inner face is a reflecting surface.
Wherein, the thickness of said composite parabolic is 2～6mm, and original sheet glass 1 is ultra-white float glass or simple glass, and the thickness of reflectance coating 2 is 20～200 μ m, and the material of reflectance coating 2 is Al or Ag.
The preparation method of the utility model may further comprise the steps:
Step 1 calculates corresponding secondary reflection mirror compound parabolic surface curve according to the layout and the caliber size of thermal-collecting tube, adopts hot bending tempering method that original sheet glass 1 hot bending tempering is prepared required composite parabolic shape according to this curve;
Because composite parabolic top cambered surface flexibility is bigger, as adopts the moulding of whole hot bending tempering, be difficult to guarantee the machining precision of this composite parabolic, and yield rate is lower.Therefore hot bending tempering process adopts half compound parabolic method for processing surface, is combined into a complete composite parabolic through two and half composite parabolics then, therefore, the utility model provides the another kind of structure of composite parabolic secondary reflection mirror:
A kind of solar energy thermal-power-generating is with composite parabolic secondary reflection mirror; Comprise two original sheet glasses 1 that bend to half composite parabolic shape; The outside of original sheet glass 1 is coated with reflectance coating 2; Inner face is a reflecting surface, and two original sheet glasses 1 join at the place, summit of half composite parabolic, constitute complete composite parabolic secondary reflection mirror.
The preparation method of this structure composite parabolic secondary reflection mirror may further comprise the steps:
Step 1; Layout and caliber size according to thermal-collecting tube calculate corresponding secondary reflection mirror compound parabolic surface curve; Adopt hot bending tempering method that two original sheet glasses, 1 hot bending tempering is prepared half composite parabolic according to this curve; Again the original sheet glass 1 behind two hot bending tempering is connected combination at place, parabolic summit, form required composite parabolic shape;
Compared with prior art, the utility model has adopted cheap original sheet glass as mirror surface, has uniformity coefficient height, reflectivity height, good stability, good, the long service life of firmness, and advantages such as cost is lower, simple to operate, environmental friendliness.
Description of drawings
Fig. 1 is a kind of composite parabolic secondary reflection of the utility model mirror structural representation, and axisymmetricly, middle thin straight dotted line is an axis of symmetry.
Fig. 2 is a kind of composite parabolic secondary reflection of the utility model mirror preparation method process flow diagram.
Embodiment
Specify the embodiment of the utility model below in conjunction with accompanying drawing and embodiment.
As shown in Figure 1, a kind of solar energy thermal-power-generating of the utility model comprises the original sheet glass 1 that bends to the composite parabolic shape with composite parabolic secondary reflection mirror, and the outside of original sheet glass 1 is coated with reflectance coating 2, and inner face is a reflecting surface.
The preparation method of above-mentioned composite parabolic secondary reflection mirror may further comprise the steps:
Step 1 calculates corresponding secondary reflection mirror compound parabolic surface curve according to the layout and the caliber size of thermal-collecting tube, adopts hot bending tempering method that original sheet glass 1 hot bending tempering is prepared required composite parabolic shape according to this curve;
As shown in Figure 2, be the technological process that the utility model prepares composite parabolic secondary reflection mirror, mainly comprise hot bending tempering and physics plating mirror.
Hot bending steel process step mainly is:
1) composite parabolic curve calculation
The thermal-collecting tube that with the caliber is 70mm is an example, provides the composite parabolic calculated curve and is:
(1) involute urve of circle partly is:
(2) para-curve partly is:
2) composite parabolic Mold Making;
3) processing of original sheet glass and cutting, original sheet glass 1 is selected ultra-white float glass or simple glass;
4) hot bending tempering and the moulding in the original sheet glass hot bending annealing furnace, the hot bending temperature is 650～750 ℃, the thickness of composite parabolic is 2～6mm.
Physics plating mirror processing step mainly is:
1) the composite parabolic glass surface cleans;
2) preparation of specular layer plates reflectance coating 2 with the physical coating method, and the thickness of reflectance coating 2 is 20～200 μ m, and material is Al or Ag;
3) back of the body lacquer protective finish of spray or brushing single or multiple lift specular layer, thickness is greater than 100 microns;
4) composite parabolic catoptron protective finish leaving standstill and drying, the preparation of completion composite parabolic secondary reflection mirror.
Claims (5)
1. a solar energy thermal-power-generating is characterized in that with composite parabolic secondary reflection mirror, comprises the original sheet glass (1) that bends to the composite parabolic shape, and the outside of original sheet glass (1) is coated with reflectance coating (2), and inner face is a reflecting surface.
2. composite parabolic secondary reflection mirror according to claim 1 is characterized in that the thickness of composite parabolic is 2～6mm.
3. composite parabolic secondary reflection mirror according to claim 1 is characterized in that original sheet glass (1) is a ultra-white float glass.
4. composite parabolic secondary reflection mirror according to claim 1 is characterized in that, the thickness of reflectance coating (2) is 20～200 μ m.
5. composite parabolic secondary reflection mirror according to claim 1 is characterized in that the material of reflectance coating (2) is Al or Ag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200828719U CN202453526U (en) | 2012-03-07 | 2012-03-07 | Compound paraboloidal secondary mirror for solar thermal electricity generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200828719U CN202453526U (en) | 2012-03-07 | 2012-03-07 | Compound paraboloidal secondary mirror for solar thermal electricity generation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202453526U true CN202453526U (en) | 2012-09-26 |
Family
ID=46869381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200828719U Expired - Lifetime CN202453526U (en) | 2012-03-07 | 2012-03-07 | Compound paraboloidal secondary mirror for solar thermal electricity generation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202453526U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590910A (en) * | 2012-03-07 | 2012-07-18 | 中国华能集团清洁能源技术研究院有限公司 | Compound parabolic secondary reflector for solar thermal electricity generation and preparation method thereof |
-
2012
- 2012-03-07 CN CN2012200828719U patent/CN202453526U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590910A (en) * | 2012-03-07 | 2012-07-18 | 中国华能集团清洁能源技术研究院有限公司 | Compound parabolic secondary reflector for solar thermal electricity generation and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA HUANENG GROUP R + D CENTER Effective date: 20140515 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140515 Address after: 100098 Beijing city Haidian District No. 48 Zhichun Road Yingdu building A block 26 layer Patentee after: China Huaneng Group Clean Energy Technology Research Institute Co., Ltd. Patentee after: Huaneng Group Technology Innovation Center Address before: 100098 Beijing city Haidian District No. 48 Zhichun Road Yingdu building A block 26 layer Patentee before: China Huaneng Group Clean Energy Technology Research Institute Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120926 |
|
| CX01 | Expiry of patent term |