CN115164418B - Wide open slot type solar energy condenser - Google Patents
Wide open slot type solar energy condenser Download PDFInfo
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- CN115164418B CN115164418B CN202210583702.1A CN202210583702A CN115164418B CN 115164418 B CN115164418 B CN 115164418B CN 202210583702 A CN202210583702 A CN 202210583702A CN 115164418 B CN115164418 B CN 115164418B
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- Prior art keywords
- reflecting mirror
- mirror
- heat collecting
- open slot
- wide open
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- 230000005855 radiation Effects 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 3
- 229920002545 silicone oil Polymers 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000004907 flux Effects 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008642 heat stress Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S23/74—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with trough-shaped or cylindro-parabolic reflective surfaces
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Optical Elements Other Than Lenses (AREA)
- Photovoltaic Devices (AREA)
Abstract
The application discloses a wide open slot type solar condenser, which comprises a reflecting mirror group, a reflecting mirror bracket, a heat collecting pipe bracket and a transmission tracking mechanism, wherein the reflecting mirror group is arranged on the reflecting mirror bracket; the reflecting mirror group comprises a first reflecting mirror and a second reflecting mirror which form a groove reflecting mirror surface; the focal length of the first reflecting mirror is set differently from the focal length of the second reflecting mirror; the heat collecting pipe is arranged on the focal line of the parabolic mirror surface formed by the first reflecting mirror; the transmission tracking mechanism comprises a base, a rotating main body and a power device; under the working state, the rotating main body drives the reflecting mirror group to track and track the sun under the drive of the power device, the received solar radiation is focused to a first area of the heat collecting tube through the first reflecting mirror, and the received solar radiation is focused to a second area of the heat collecting tube through the second reflecting mirror; the application can form a plurality of light spots on the heat collecting tube, effectively enlarge the area of the focused light spots, reduce the heat flux density of the focused light spots, ensure the heat collecting tube to be heated uniformly and improve the operation safety of equipment.
Description
Technical Field
The application relates to the technical field of trough type solar concentrating and heat collecting, in particular to a wide-opening trough type solar concentrator.
Background
The trough type solar reflector condenser utilizes a parabolic reflector surface to focus sunlight on a focal line of the trough type solar reflector condenser, and collects solar radiation energy to heat a heat collecting pipe arranged at the focal line position, so as to heat a heat transfer working medium in the solar radiation energy, thereby realizing the process of converting solar energy into heat energy; the steam can be used for generating electricity or being applied to other heat utilization fields by means of the power circulation of the steam.
The ratio of the width of the trough-shaped condensing opening of the trough-shaped mirror condenser to the width of the focal line is the condensing ratio, the higher the condensing temperature obtained at the focused focal spot. The outer mirror of the vacuum heat absorption tube of the current groove type solar heat collector is 90mm, the light spot width after focusing of the condenser is generally smaller than 30 mm, the heat flow density difference between the two sides and the middle part of the circumferential heating range of the heat collection tube is large, and the heat flow density distribution nonuniformity is very serious. The heat collecting tube is heated unevenly due to uneven heat flux density distribution, so that larger thermal stress is easy to generate, the heat collecting tube is deformed, and the service life of equipment and operation safety are affected.
Because the number of the heat collection field loops is numerous, each loop is connected with a plurality of heat collectors in series, and the manufacturing and the installation of equipment are different, so that the flow resistance of each loop is different, the flow of each loop is difficult to balance, the adjustment of the temperature of the heat conduction oil is delayed, and local overtemperature occurs in each loop, so that the heat collection tube is deformed or damaged due to the heat stress and overtemperature generated by uneven heating.
Disclosure of Invention
The application provides a wide-open slot type solar concentrator for solving the problem of non-uniform heat flux in the circumferential direction of the current concentrator.
The application provides a wide open slot type solar energy condenser which adopts the following technical scheme:
A wide open slot type solar energy condenser comprises a reflecting mirror group, a reflecting mirror bracket for bearing the reflecting mirror group, a heat collecting pipe bracket for bearing the heat collecting pipe and a transmission tracking mechanism;
The reflecting mirror group comprises a first reflecting mirror and a second reflecting mirror arranged outside the first reflecting mirror; the first reflecting mirror and the second reflecting mirror form a groove type reflecting mirror surface; the focal length of the first reflecting mirror is set differently from the focal length of the second reflecting mirror;
The heat collecting tube is arranged on the focal line of the parabolic mirror surface formed by the first reflecting mirror;
The transmission tracking mechanism comprises a base, a rotating main body and a power device, wherein the rotating main body is arranged on the base; the reflector bracket is arranged on the rotating main body;
under the working state, the rotating main body drives the reflecting mirror group to track and track the sun under the driving of the power device, the received solar radiation is focused to a first area of the heat collecting tube through the first reflecting mirror, and the received solar radiation is focused to a second area of the heat collecting tube through the second reflecting mirror.
By adopting the technical scheme, the reflected light of the first reflecting mirror and the second reflecting mirror can form a plurality of light spots on the heat collecting tube, so that the area of the focused light spots is effectively enlarged, the heat flux density of the focused light spots is reduced, the heat collecting tube is uniformly heated, the deformation or damage of the heat collecting tube caused by local overheating is effectively avoided, and the operation safety of equipment is greatly improved.
Preferably, the first mirror is a parabolic mirror;
The first reflecting mirror and the second reflecting mirror are arranged in different areas.
By adopting the technical scheme, the reflecting devices in different areas are formed, so that the focusing on the heat collecting tube can be ensured, the area of a focusing light spot can be enlarged, and the heat receiving rate is improved.
Preferably, the second mirror comprises two additional outer mirrors, the two additional outer mirrors being symmetrically arranged with respect to the first mirror.
By adopting the technical scheme, the light spots focused on the heat collecting tube by the two additional external mirrors are not overlapped with the light spots focused on the heat collecting tube by the first reflecting mirror, so that the large-area and uniform heating of the heat collecting tube is realized.
Preferably, the second mirror is a parabolic mirror.
By adopting the technical scheme, the condensing uniformity is improved, and the solar condensing spot is effectively ensured to be focused in the receiving range of the heat collecting tube.
Preferably, the focal point formed by the second reflecting mirror reflecting onto the heat collecting pipe is higher than the focal point formed by the first reflecting mirror reflecting onto the heat collecting pipe.
By adopting the technical scheme, the light spots focused by the second reflecting mirror are concentrated on the two sides of the light spots focused by the first reflecting mirror, so that the area of the light spots focused on the heat collecting tube by the whole reflecting mirror group is increased.
Preferably, the mirror support is connected to the rotating body by a torque tube.
Through adopting above-mentioned technical scheme, guarantee to rotate the rotation of main part and can drive the speculum support rotation, realize the angle control to the speculum group.
Preferably, the mirror support comprises a first support assembly carrying the first mirror and a second support assembly carrying the second mirror;
The first bracket component comprises a cross beam, a first connecting rod, a second connecting rod and a third connecting rod, one end of the cross beam is connected with the rotating main body, and the other end of the cross beam is arranged in a cantilever manner; one end of the first connecting rod is connected with the first position at the bottom of the first reflecting mirror, and the other end of the first connecting rod is connected with the cross beam; one end of the second connecting rod is connected with the second position at the bottom of the first reflecting mirror, and the other end of the second connecting rod is connected with the cross beam; one end of the third connecting rod is connected with the second position at the bottom of the first reflecting mirror, and the other end of the third connecting rod is connected with the rotating main body;
one end of the second bracket component is connected with the bottom of the second reflecting mirror, and the other end of the second bracket component is connected with the cross beam.
Through adopting above-mentioned technical scheme, satisfy the bearing strength to first speculum and second speculum, make the overall structure of speculum support more firm, effectively reduce whole weight simultaneously, realize lightweight design.
Preferably, the heat collecting tube is a vacuum heat absorbing tube.
By adopting the technical scheme, the heat absorption rate is improved.
Preferably, the internal working medium of the heat collecting tube is a heat conducting fluid.
By adopting the technical scheme, the conversion rate of solar energy and heat energy is improved, the heat collecting tube is uniformly heated, and the deformation of the heat collecting tube caused by overhigh local heat flux density of the heat collecting tube is avoided.
Preferably, the heat conducting fluid is heat conducting oil, water, molten salt or silicone oil.
By adopting the technical scheme, all liquid media or supercritical media at the working temperature of the system can be satisfied, and the cost of the system is effectively reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
1. According to the application, through the arrangement of the second reflecting mirror, the focus light spot of the second reflecting mirror is not overlapped with the focus light spot of the first reflecting mirror, so that a plurality of light spot lines are formed on the heat collecting tube, the area of the focus light spot is enlarged, the heat flow density of the focus light spot of the main condenser is reduced, and the heat collecting tube is uniformly heated. The problem of deformation of the heat collecting tube caused by overhigh local heat flux density is avoided, the energy utilization rate of solar energy is effectively improved, and the operation safety of equipment is improved.
2. According to the scheme disclosed by the application, the large-opening heat collection can be realized, the solar concentrating spot can be ensured to be focused in the receiving range of the heat collection tube, and the light concentration ratio is effectively improved.
3. The application has simple structure and is convenient to popularize and use.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present application.
Fig. 2 is a schematic focusing view of the heat collecting tube in the present application.
Reference numerals illustrate: 10. a first mirror; 21. a first bracket assembly; 22. a second bracket assembly; 30. an additional external mirror; 40. a heat collecting pipe bracket; 50. a heat collecting pipe; 60. a base; 70. the body is rotated.
Detailed Description
The present application will be described in further detail with reference to fig. 1 to 2.
The embodiment of the application discloses a wide open slot type solar concentrator.
Referring to fig. 1, the mirror assembly comprises a mirror group, a mirror support for carrying the mirror group, a heat collecting pipe 50 support 40 for carrying the heat collecting pipe 50, and a transmission tracking mechanism.
The mirror group comprises a first mirror 10 and a second mirror arranged outside the first mirror 10; the first mirror 10 and the second mirror constitute a groove mirror surface.
The first reflecting mirror 10 is a parabolic reflecting mirror, and the areas of the first reflecting mirror 10 and the second reflecting mirror are different, that is, the focal line of the external additional outer mirror 30 is not coincident with the focal line of the first reflecting mirror 10, so as to form a reflecting device with different areas, thereby not only ensuring the focusing on the heat collecting tube 50, but also enlarging the area of the focused light spot and improving the heat receiving rate.
In this embodiment, the second reflecting mirror is also a parabolic reflecting mirror, so as to improve the focusing uniformity, and effectively ensure that the solar focusing spot is focused in the receiving range of the heat collecting tube 50.
Specifically, the second mirror includes two additional outer mirrors 30, and the two additional outer mirrors 30 are symmetrically disposed with respect to the first mirror 10; the light spots focused on the heat collecting tube 50 by the two additional outer mirrors 30 are not overlapped with the light spots focused on the heat collecting tube 50 by the first reflecting mirror 10, so that the large-area and uniform heating of the heat collecting tube 50 is realized.
The heat collecting pipe 50 is disposed on the focal line of the parabolic mirror surface formed by the first reflecting mirror 10.
The mirror support comprises a first support assembly 21 carrying the first mirror 10 and a second support assembly 22 carrying the second mirror; the first bracket assembly 21 comprises a cross beam, a first connecting rod, a second connecting rod and a third connecting rod, wherein one end of the cross beam is connected with the rotating main body 70, and the other end of the cross beam is in overhanging arrangement; the setting of speculum support satisfies the bearing strength to first speculum 10 and second speculum, makes the overall structure of speculum support more firm, effectively reduces whole weight simultaneously, realizes lightweight design.
Specifically, one end of the first link is connected to the first position of the bottom of the first mirror 10, and the other end is connected to the cross beam.
One end of the second connecting rod is connected with the second position of the bottom of the first reflecting mirror 10, and the other end is connected with the cross beam.
One end of the third link is connected to the second position of the bottom of the first reflecting mirror 10, and the other end is connected to the rotating body 70.
One end of the second bracket assembly 22 is connected to the bottom of the second mirror and the other end is connected to the cross beam.
In an embodiment, the bottom second position of the first mirror 10 is located in a different area than the bottom first position of the first mirror 10, ensuring the bearing of the first mirror 10.
The transmission tracking mechanism comprises a base 60, a rotating main body 70 and a power device, wherein the rotating main body 70 is arranged on the base 60; the mirror support is mounted to the rotating body 70.
The reflector bracket is connected with the rotating main body 70 through a torque tube, so that the rotation of the rotating main body 70 can drive the reflector bracket to rotate, and the angle control of the reflector group is realized.
In the working state, the rotating body 70 drives the reflecting mirror group to track and track the sun under the driving of the power device, the received solar radiation is focused to a first area of the heat collecting tube 50 through the first reflecting mirror 10, and the received solar radiation is focused to a second area of the heat collecting tube 50 through the second reflecting mirror.
The heat collecting pipe 50 is a vacuum heat absorbing pipe, and increases the heat absorbing rate. The internal working medium of the heat collecting tube 50 is a heat conducting fluid, and comprises a liquid medium or a supercritical medium at all system working temperatures, such as heat conducting oil, water, molten salt, silicone oil and the like, so that the conversion rate of solar energy and heat energy is improved, the heat collecting tube 50 is uniformly heated, and the deformation of the heat collecting tube 50 caused by overhigh local heat flux density is avoided.
By adopting the technical scheme, the reflected light rays of the first reflecting mirror 10 and the second reflecting mirror can form a plurality of light spots on the heat collecting tube 50, so that the area of the focused light spots is effectively enlarged, the heat flux density of the focused light spots is reduced, the heat collecting tube 50 is uniformly heated, the deformation or damage of the heat collecting tube 50 caused by local overheating is effectively avoided, and the operation safety of equipment is greatly improved.
Further, the first mirror may be an inner and outer mirror set of two parabolic mirrors of different sizes.
Referring to fig. 2, the second reflecting mirror reflects to the heat collecting pipe 50 to form a focus higher than the first reflecting mirror 10 reflects to the heat collecting pipe 50.
Specifically, the first reflecting mirror 10 has a parabolic cross section with a focal position and a focal length, and when the solar irradiation is sufficient, the focused light spot is concentrated in a small area at the bottom end of the vacuum heat absorption tube.
By additionally arranging the additional outer mirror 30, the section parabola is that the focal point position is that the focal point of the additional outer mirror 30 is higher than that of the first reflecting mirror 10, compared with the first reflecting mirror, the focused light spots are concentrated on two sides of the light spots focused by the inner and outer mirrors, so that the light spot area focused on the vacuum heat absorption pipe by the whole reflecting mirror condenser is enlarged, and a plurality of light spot lines are formed.
The implementation principle of the wide open slot type solar concentrator provided by the embodiment of the application is as follows: according to the application, through the additionally arranged second reflecting mirror, and the light spots of the second reflecting mirror are not overlapped with the light spots of the first reflecting mirror 10, so that a plurality of light spot lines are formed on the vacuum heat absorption tube, the area of the focused light spots is enlarged, the heat flux density of the focused light spots of the main condenser is reduced, and the heat collection tube 50 is uniformly heated. The problem of deformation of the vacuum heat absorption tube caused by overhigh local heat flux density of the vacuum heat absorption tube is avoided, the energy utilization rate of solar energy is increased, and the operation safety of equipment is improved.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (10)
1. A wide open slot solar concentrator characterized by: comprising
The device comprises a reflector group, a reflector bracket for bearing the reflector group, a heat collecting tube (50), a heat collecting tube bracket (40) for bearing the heat collecting tube (50) and a transmission tracking mechanism;
The reflector group comprises a first reflector (10) and a second reflector arranged outside the first reflector (10); the first reflecting mirror (10) and the second reflecting mirror form a groove reflecting mirror surface; the focal length of the first reflecting mirror (10) is set differently from the focal length of the second reflecting mirror;
the heat collecting tube (50) is arranged on the focal line of the parabolic mirror surface formed by the first reflecting mirror (10);
the transmission tracking mechanism comprises a base (60), a rotating main body (70) and a power device, wherein the rotating main body (70) is arranged on the base (60); the reflector bracket is arranged on the rotating main body (70);
Under the working state, the rotating main body (70) drives the reflecting mirror group to track and track the sun under the driving of the power device, the received solar radiation is focused to a first area of the heat collecting pipe (50) through the first reflecting mirror (10), and the received solar radiation is focused to a second area of the heat collecting pipe (50) through the second reflecting mirror.
2. The wide open slot solar concentrator of claim 1, wherein: the first reflecting mirror (10) is a parabolic reflecting mirror;
The first mirror (10) and the second mirror are arranged in different areas.
3. The wide open slot solar concentrator of claim 1, wherein: the second mirror comprises two additional outer mirrors (30), the two additional outer mirrors (30) being symmetrically arranged with respect to the first mirror (10).
4. The wide open slot solar concentrator of claim 1, wherein: the second mirror is a parabolic mirror.
5. The wide open slot solar concentrator of claim 4, wherein: the focus formed by the second reflecting mirror reflecting to the heat collecting pipe (50) is higher than the focus formed by the first reflecting mirror (10) reflecting to the heat collecting pipe (50).
6. The wide open slot solar concentrator of claim 1, wherein: the mirror support is connected to the rotating body (70) by a torque tube.
7. The wide open slot solar concentrator of claim 6, wherein: the mirror support comprises a first support assembly (21) carrying the first mirror (10) and a second support assembly (22) carrying the second mirror;
The first bracket component (21) comprises a cross beam, a first connecting rod, a second connecting rod and a third connecting rod, one end of the cross beam is connected with the rotating main body (70), and the other end of the cross beam is arranged in a overhanging manner; one end of the first connecting rod is connected with a first position at the bottom of the first reflecting mirror (10), and the other end of the first connecting rod is connected with the cross beam; one end of the second connecting rod is connected with the second position at the bottom of the first reflecting mirror (10), and the other end of the second connecting rod is connected with the cross beam; one end of the third connecting rod is connected with the second position at the bottom of the first reflecting mirror (10), and the other end of the third connecting rod is connected with the rotating body (70);
one end of the second bracket component (22) is connected with the bottom of the second reflecting mirror, and the other end of the second bracket component is connected with the cross beam.
8. The wide open slot solar concentrator of claim 1, wherein: the heat collecting pipe (50) is a vacuum heat absorbing pipe.
9. The wide open slot solar concentrator of claim 1, wherein: the internal working medium of the heat collecting tube (50) is heat conducting fluid.
10. The wide open slot solar concentrator of claim 9, wherein: the heat conducting fluid is heat conducting oil, water, molten salt or silicone oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210583702.1A CN115164418B (en) | 2022-05-25 | 2022-05-25 | Wide open slot type solar energy condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210583702.1A CN115164418B (en) | 2022-05-25 | 2022-05-25 | Wide open slot type solar energy condenser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115164418A CN115164418A (en) | 2022-10-11 |
| CN115164418B true CN115164418B (en) | 2024-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210583702.1A Active CN115164418B (en) | 2022-05-25 | 2022-05-25 | Wide open slot type solar energy condenser |
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| Country | Link |
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| CN (1) | CN115164418B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106247638A (en) * | 2016-09-27 | 2016-12-21 | 佛山职业技术学院 | A kind of solar heat power generation system with slot-type optical collector |
| CN107421135A (en) * | 2017-09-10 | 2017-12-01 | 北京中热能源科技有限公司 | A kind of slot type thermal-collecting tube tracing collection system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4269168A (en) * | 1978-12-18 | 1981-05-26 | Johnson Steven A | Focusing reflector solar energy collector apparatus and method |
| JP2009079510A (en) * | 2007-09-26 | 2009-04-16 | Kawashima Koki Kk | Solar heat power generation device |
| KR20180018219A (en) * | 2016-08-13 | 2018-02-21 | 오세준 | Solar Energy Collector and Concentrator Hybrid Generation Module |
-
2022
- 2022-05-25 CN CN202210583702.1A patent/CN115164418B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106247638A (en) * | 2016-09-27 | 2016-12-21 | 佛山职业技术学院 | A kind of solar heat power generation system with slot-type optical collector |
| CN107421135A (en) * | 2017-09-10 | 2017-12-01 | 北京中热能源科技有限公司 | A kind of slot type thermal-collecting tube tracing collection system |
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| Publication number | Publication date |
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| CN115164418A (en) | 2022-10-11 |
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