CN113865114A - Solar energy comprehensive utilization device for concentrating, collecting and generating light - Google Patents
Solar energy comprehensive utilization device for concentrating, collecting and generating light Download PDFInfo
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- CN113865114A CN113865114A CN202111123669.6A CN202111123669A CN113865114A CN 113865114 A CN113865114 A CN 113865114A CN 202111123669 A CN202111123669 A CN 202111123669A CN 113865114 A CN113865114 A CN 113865114A
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Images
Classifications
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- 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
- F24S10/45—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors the enclosure being cylindrical
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
-
- 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
- F24S23/71—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with parabolic reflective surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S30/00—Arrangements for moving or orienting solar heat collector modules
- F24S30/40—Arrangements for moving or orienting solar heat collector modules for rotary movement
- F24S30/42—Arrangements for moving or orienting solar heat collector modules for rotary movement with only one rotation axis
- F24S30/425—Horizontal axis
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/20—Optical components
- H02S40/22—Light-reflecting or light-concentrating means
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/138—Water desalination using renewable energy
- Y02A20/142—Solar thermal; Photovoltaics
-
- 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
-
- 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
- Y02E10/47—Mountings or tracking
-
- 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
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
Abstract
The invention provides a solar energy comprehensive utilization device for concentrating, collecting heat and generating electricity, which comprises: the light-gathering heat-collecting part is used for gathering solar light energy to generate heat; the photovoltaic power generation part is arranged on one side of the light and heat collecting part facing the sun; the photovoltaic power generation part is used for converting light energy into electric energy; the light reflecting part is arranged between the light-gathering heat-collecting part and the photovoltaic power generation part; the light reflecting part is used for reflecting light. The photovoltaic power generation part is arranged on the side of the light-gathering and heat-collecting part facing the sun, so that the photovoltaic power generation part can not only convert solar energy into electric energy in a high-temperature state, but also effectively reduce the heat radiated outwards from the side of the light-gathering and heat-collecting part facing the sun, and reduce the heat loss of the light-gathering and heat-collecting part. The light reflecting part is arranged between the light-gathering heat-collecting part and the photovoltaic power generation part, so that partial light gathered by the light-gathering heat-collecting part can be prevented from irradiating the photovoltaic power generation part, and the photovoltaic power generation part can be prevented from being damaged. Meanwhile, the light reflecting part can reflect the heat radiation of the light-gathering heat-collecting part, and the heat loss of the light-gathering heat-collecting part can be reduced.
Description
Technical Field
The invention relates to the field of solar energy utilization, in particular to a solar energy comprehensive utilization device for concentrating, collecting and generating electricity.
Background
The trough type heat collecting system is one of light-gathering and heat-collecting devices. The trough type heat collecting system is a high-temperature heat collecting technology which is the most mature in technology and the most extensive in application in the field of solar light-gathering and heat-collecting. The solar energy seawater desalination device is mainly applied to the fields of solar energy seawater desalination, solar energy refrigeration, photo-thermal power generation and the like. The trough type light-gathering heat-collecting system mainly comprises a reflector, a vacuum heat-collecting tube, a tracking device, a supporting truss and the like. In the field of photo-thermal power generation, the outlet temperature of a heat absorbing working medium in the groove type light-gathering and heat-collecting system is up to 400-550 ℃. As a core device of the trough type light-gathering heat collecting system, the heat loss performance of the evacuated collector tube at such high temperature has an important influence on the comprehensive efficiency of the trough type heat collecting system.
The vacuum heat collecting tube mainly comprises an inner heat absorbing tube and an outer glass tube. In order to reduce convection and heat conduction and heat loss of the vacuum heat collecting tube, the space between the inner heat absorption tube and the outer glass tube is vacuumized. Therefore, the main heat loss of the evacuated collector tube is radiant heat loss. According to the law of heat transfer of blackbody emission power, the quantity of radiation heat of an object to the outside is in direct proportion to the fourth power of the temperature of the object. Therefore, under the high temperature of 400-.
The great amount of heat radiated by the vacuum heat collecting pipe outwards can cause the heat collecting efficiency of the groove type heat collecting system to be reduced. In the prior art, the radiation intensity of the evacuated collector tube is generally reduced to reduce heat loss, and although the method of reducing heat loss by reducing radiation intensity can reduce heat loss, the lost heat is basically lost.
Therefore, the prior art has defects and needs to be improved and developed.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a solar energy comprehensive utilization device for concentrating light, collecting heat and generating electricity, and aims to solve the problem of large heat loss of the solar energy heat collecting device in the prior art.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a solar energy comprehensive utilization device for concentrating light, collecting heat and generating electricity comprises:
the light-gathering heat-collecting part is used for gathering solar light energy to generate heat;
the photovoltaic power generation part is arranged on one side of the light and heat collecting part facing the sun; the photovoltaic power generation part is used for converting light energy into electric energy;
a light reflecting portion disposed between the light condensing and heat collecting portion and the photovoltaic power generating portion; the light reflecting part is used for reflecting light.
Further, the light reflecting portion is attached to the side surface of the photovoltaic power generation portion facing the light-gathering and heat-collecting portion.
Further, the size of the light reflecting portion is equal to the size of the side surface of the photovoltaic power generation portion facing the light-gathering and heat-collecting portion.
Furthermore, the material of the light reflecting part is metal.
Further, the light and heat collecting part comprises a reflector arranged towards the photovoltaic power generation part and a vacuum heat collecting pipe arranged between the reflector and the photovoltaic power generation part;
the vacuum heat collecting tube comprises an outer tube and an inner tube positioned on the inner side of the outer tube, and a vacuum state is formed between the outer tube and the inner tube.
Further, the width of the photovoltaic power generation part is between the diameter of the inner pipe and the diameter of the outer pipe;
the photovoltaic power generation part comprises a plurality of photovoltaic cells, and the photovoltaic cells are connected in a splicing mode.
Further, two ends of the inner pipe in the axial direction extend outwards beyond the outer pipe;
the solar comprehensive utilization device for concentrating light, collecting heat and generating electricity further comprises fixing parts, wherein the fixing parts are arranged at two axial ends of the inner pipe;
the fixing part comprises a first fixing part, a second fixing part and a connecting part for connecting the first fixing part and the second fixing part, the first fixing part is sleeved on the photovoltaic cell, and the second fixing part is sleeved on the inner tube.
Further, the connecting piece is hollowed out along the axial direction of the inner pipe;
each fixed part still all includes the fastener, the fastener is along the radial of inner tube is worn to establish on the connecting piece.
Further, the solar comprehensive utilization device for concentrating light, collecting heat and generating electricity also comprises a support part;
the supporting part is arranged between the two fixing parts and comprises a first supporting part and a second supporting part, the first supporting part is sleeved on the photovoltaic cell, the second supporting part is sleeved on the outer tube, and the first supporting part is connected with the second supporting part.
Furthermore, the solar comprehensive utilization device for concentrating light, collecting heat and generating electricity also comprises a metal gasket and a resin gasket;
the metal gasket is clamped between the second fixing piece and the inner pipe;
the resin gaskets are clamped between the first fixing piece and the photovoltaic cell, between the first supporting piece and the photovoltaic cell, and between the second supporting piece and the outer tube.
According to the technical scheme, the invention has at least the following advantages and positive effects:
in the invention, the photovoltaic power generation part is arranged on the side of the light-gathering and heat-collecting part facing the sun, so that the photovoltaic power generation part can not only convert solar energy into electric energy in a high-temperature state, but also effectively reduce the heat radiated outwards from the side of the light-gathering and heat-collecting part facing the sun, and reduce the heat loss of the light-gathering and heat-collecting part. The light reflecting part is arranged between the light-gathering heat-collecting part and the photovoltaic power generation part, so that partial light gathered by the light-gathering heat-collecting part can be prevented from irradiating the photovoltaic power generation part, and the photovoltaic power generation part can be prevented from being damaged. Meanwhile, the light reflecting part can also reflect the heat radiation of the light-gathering heat collecting part, so that the lost heat radiation can be reflected back again, and the light-gathering heat collecting part can recover the lost heat.
Drawings
Fig. 1 is a schematic structural view of a solar energy comprehensive utilization apparatus for concentrating light, collecting heat, and generating electricity according to an embodiment of the present invention.
Fig. 2 is a side view of fig. 1.
Description of reference numerals:
100. a solar energy comprehensive utilization device for concentrating light, collecting heat and generating electricity; 1. a photovoltaic power generation section; 11. a photovoltaic cell; 2. a light-gathering heat-collecting part; 21. a mirror; 22. a vacuum heat collecting tube; 221. an inner tube; 222. an outer tube; 3. a light reflecting section; 4. a fixed part; 41. a first fixing member; 42. a second fixing member; 43. a connecting member; 44. a fastener; 45. a bolt; 5. a support portion; 51. a first support member; 52. a second support member; 61. a metal gasket; 62. a resin gasket; 7. a mirror support portion; 71. a rotating shaft; 72. a tripod.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Referring to fig. 1, in an embodiment of the present invention, a solar energy comprehensive utilization device 100 for concentrating light, collecting heat and generating electricity is provided, which is used for converting solar energy into heat energy and electric energy. The solar energy comprehensive utilization device 100 for concentrating heat and generating electricity includes a concentrating heat collecting part 2 installed on the ground, a photovoltaic power generating part 1 installed on a sun-facing side of the concentrating heat collecting part 2, and a light reflecting part 3 disposed between the concentrating heat collecting part 2 and the photovoltaic power generating part 1.
The light-concentrating heat-collecting portion 2 concentrates the solar rays to generate heat to convert solar energy into heat energy. The photovoltaic power generation section 1 is disposed on the side of the light-collecting heat collecting section 2 facing the sun, that is, the photovoltaic power generation section 1 is disposed above the light-collecting heat collecting section 2. The light-gathering heat-collecting part 2 transfers heat outwards in a heat radiation manner in a high-temperature state, so that a certain heat loss exists in the light-gathering heat-collecting, and therefore, under the blocking of the photovoltaic power generation part 1 in the high-temperature state, the photovoltaic power generation part 1 can not only effectively reduce the heat radiation outwards from the side of the light-gathering heat-collecting part 2 facing the sun, and reduce the heat loss of the light-gathering heat-collecting part 2, but also can convert the solar light energy irradiated to the surface of the photovoltaic power generation part 1 into electric energy. The light reflecting portion 3 is used to reflect light, that is, the light reflecting portion 3 can reflect back the light irradiated to its surface. The light reflecting portion 3 is provided between the light-condensing heat collecting portion 2 and the photovoltaic power generation portion 1, and can prevent the light condensed by the light-condensing heat collecting portion 2 from being irradiated on the surface of the photovoltaic power generation portion 1 facing the light-condensing heat collecting portion 2, and can prevent the photovoltaic power generation portion 1 from being damaged. When the light-gathering heat-collecting part gathers light, part of the light is reflected upwards to the reflecting part 3 and can be reflected downwards again to the light-gathering heat-collecting part 2 by the reflecting part 3. Moreover, the heat radiated outwards by the light-gathering heat-collecting part 2 is radiated outwards in an infrared mode, and when the infrared reaches the surface of the light reflecting part 3, the infrared can be reflected back to the light-gathering heat-collecting part 2, so that the lost heat loss part can be reused.
The light reflecting part 3 may be a smooth-surfaced metal plate or a metal film or a mirror surface or other devices capable of reflecting solar rays. The light reflecting portion 3 is provided between the light-collecting and heat-collecting portion 2 and the photovoltaic power generation portion 1. The light reflecting portion 3 may be mounted in the following manner: a support plate (not shown) is installed between the light-collecting and heat-collecting unit 2 and the photovoltaic power generation unit 1, and then the light-reflecting unit 3 is installed on the surface of the support plate facing the light-collecting and heat-collecting unit 2. The reflecting part 3 and the supporting plate can be installed through bolt screwing or bonding.
Referring to fig. 1 and fig. 2, as a specific embodiment of the present embodiment, the light reflecting portion 3 is attached to a side surface of the photovoltaic power generation portion 1 facing the light-concentrating heat-collecting portion 2, that is, the light reflecting portion 3 and the side surface of the photovoltaic power generation portion 1 facing the light-concentrating heat-collecting portion 2 are attached to each other, so that the light reflecting portion 3 can be conveniently installed. The attachment arrangement may be achieved by bolting or gluing. Moreover, the reflector 3 is installed in such a way, so that the reflector 3 can be prevented from being installed by additionally constructing a bracket.
Referring to fig. 1 and fig. 2, as a specific embodiment of the present embodiment, the size of the light reflecting portion 3 is equal to the size of the side surface of the photovoltaic power generation portion 1 facing the light-gathering heat collecting portion 2, that is, the edge of the light reflecting portion 3 is flush with the edge of the side surface of the photovoltaic power generation portion 1 facing the light-gathering heat collecting portion 2, so as to prevent the light reflecting portion 3 from exceeding the photovoltaic power generation portion 1 and generating additional shielding for the light-gathering heat collecting portion 2 to obtain the sunlight.
Referring to fig. 1 and 2, as an embodiment of the present invention, the light reflecting portion 3 is in a film shape, and the material of the light reflecting portion 3 is metal. For example, the light reflecting portion 3 may be a highly reflective aluminum film, and the aluminum film is coated on the side surface of the photovoltaic power generation portion 1 facing the light-concentrating and heat-collecting portion 2, that is, the aluminum film is coated on the bottom of the photovoltaic power generation portion 1. Due to the material characteristics of the high-reflection aluminum film, full-wave-band reflection can be achieved, infrared rays can be radiated outwards by the light-gathering heat-collecting portion 2 in a high-temperature state, the light-reflecting portion 3 is arranged, the photovoltaic power generation portion 1 can be prevented from being damaged due to the gathering of reflected light, heat radiated by the light-gathering heat-collecting portion 2 can be reflected back, and the light-gathering heat-collecting portion 2 can absorb lost heat again. The specific structure of the aluminum film can be referred to the related art, and is not described in detail herein. The light reflecting portion 3 can prevent a part of light rays collected by the light-collecting and heat-collecting portion 2 from irradiating the bottom surface of the photovoltaic power generation portion 1, and can reflect the part of light rays back to the light-collecting and heat-collecting portion 2, so that the light energy utilization rate of the whole device can be improved.
However, the light reflecting portion 3 is not limited to the aluminum film, and the light reflecting portion 3 may be a metal coating or a polished metal plate made of other materials. In other embodiments, the photovoltaic power generation part 1 is a double-sided power generation structure, that is, both the side of the photovoltaic power generation part 1 facing the sun and the bottom side thereof can generate electric energy when being illuminated by light, and accordingly, the light reflection part 3 is not provided.
Referring to fig. 1 and 2, as a specific embodiment of the present embodiment, the light-collecting and heat-collecting portion 2 includes a reflector 21 disposed toward the photovoltaic power generation portion 1 and an evacuated collector tube 22 disposed between the reflector 21 and the photovoltaic power generation portion 1. The material of the reflector 21 is glass or metal. The reflecting mirror 21 is arc-shaped, the surface of the reflecting mirror is smooth, and the reflecting mirror 21 reflects and concentrates sunlight by utilizing the light-concentrating principle of a concave mirror. The opening plane of the mirror 21 is parallel to the photovoltaic power generation section 1, and the mirror 21 and the outer tube 222 are disposed at an interval. The reflector 21 has a parabolic cross section in the longitudinal direction, and can converge parallel sunlight to one point. For convenience of description, one side of the mirror 21 where light is collected will now be referred to as an inner side. The evacuated collector tube 22 is disposed at the inner side of the reflector 21 and at the light-gathering position of the reflector 21, so that the evacuated collector tube 22 can absorb the heat of the gathered sunlight. The evacuated collector tube 22 includes an outer tube 222 and an inner tube 221 located inside the outer tube 222, wherein the outer tube 222 is made of glass, the glass has high light transmittance, and the outer tube 222 made of glass can facilitate the transmission of the collected light. The inner tube 221 is made of metal, so as to absorb heat of light. The space between the outer tube 222 and the inner tube 221 is vacuum, which can reduce convection and conduction heat flow, thereby achieving the effect of heat preservation and reducing the heat loss of the inner tube 221.
The evacuated collector tube 22 is disposed above the reflector 21, so that the light reflected by the reflector 21 is mainly concentrated at the bottom of the evacuated collector tube 22, and therefore, the light received by the lower half portion of the evacuated collector tube 22 is high-power concentrated light reflected by the reflector, while the upper half portion of the evacuated collector tube 22 only receives one-time light from the sun (in the field of solar energy utilization, the solar light without being concentrated is generally referred to as one-time solar energy or one-time light, and the concentrated solar light is referred to as corresponding multiple of the solar light or solar energy). Since the heat loss of the evacuated collector tube 22 at high temperature is mainly thermal radiation, and according to the law of heat transfer of blackbody emission power, the amount of radiation heat from the outside of the object is proportional to the fourth power of the temperature of the object. Therefore, at the high temperature of 400-. Therefore, the arrangement of the photovoltaic power generation part 1 can effectively weaken the heat radiated from the evacuated solar collector tube 22 to the outside, and the photovoltaic power generation part 1 can also generate electricity by using the solar rays irradiated to the upper surface thereof. The reflecting part 3 can reflect the radiated heat back, so that the heat loss of the evacuated collector tube 22 can be effectively reduced, and the heat collecting efficiency of the evacuated collector tube 22 is improved.
Referring to fig. 1 and fig. 2, as a specific implementation manner of the present embodiment, a width of the photovoltaic power generation part 1 is between a diameter of the inner tube 221 and a diameter of the outer tube 222, and a radial length of the photovoltaic power generation part 1 extending along the outer tube 222 is a width of the photovoltaic power generation part 1. If the width of the photovoltaic power generation part 1 is larger than the diameter of the outer tube 222, the photovoltaic power generation part 1 blocks the reflector 21, and the light collection of the reflector 21 is affected. If the width of the photovoltaic power generation part 1 is smaller than the diameter of the inner tube 221, the area of the photovoltaic power generation part 1 is small, which is not favorable for the photovoltaic power generation part 1 to capture light energy.
The photovoltaic power generation section 1 includes a plurality of photovoltaic cells 11, and the plurality of photovoltaic cells 11 are connected to each other by being spliced to form the photovoltaic power generation section 1. Each photovoltaic cell 11 is in a long strip shape, and the width of each photovoltaic cell 11 is approximately equal to the diameter of the inner heat absorption pipe, that is, each photovoltaic cell 11 is mainly spliced along the axial direction of the vacuum heat collection pipe 22.
In the present embodiment, the photovoltaic cell 11 is a monocrystalline silicon cell, and the light reflecting portion 3 is disposed at the bottom of the monocrystalline silicon cell. The structure and power generation principle of the single crystal silicon cell can be referred to the related art, and are not described in detail herein.
In other embodiments, the photovoltaic cells 11 are polysilicon cells or amorphous silicon cells. The structure and power generation principle of the polycrystalline silicon cell and the amorphous silicon cell can be referred to the related art, and are not described in detail herein.
Referring to fig. 1 and 2, as a specific implementation manner of the present embodiment, two ends of the inner tube 221 along the axial direction extend outward beyond the outer tube 222. The solar energy comprehensive utilization device 100 for concentrating light, collecting heat and generating electricity further comprises two fixing parts 4, wherein the fixing parts 4 are disposed at two axial ends of the inner tube 221, that is, in the present embodiment, two fixing parts 4 are disposed, and the two fixing parts 4 are correspondingly disposed at two axial ends of the inner tube 221 respectively.
The fixing portion 4 includes a first fixing member 41, a second fixing member 42, and a connecting member 43 connecting the first fixing member 41 and the second fixing member 42. The first fixing member 41 is substantially rectangular, and a middle portion thereof is hollowed out. The first fixing member 41 is sleeved on the photovoltaic cell 11, and the first fixing member 41 is connected with the photovoltaic cell 11 through a bolt 45, so that the first fixing member 41 is tightly fastened on the photovoltaic cell 11. In the present embodiment, the bolts are pierced on the bottom surface of the photovoltaic cell 11.
The second fixing member 42 is substantially circular, the second fixing member 42 is sleeved on the inner tube 221, and the second fixing member 42 and the inner tube 221 can be connected by welding or bolts. The connection between the photovoltaic cell 11 and the vacuum heat collecting tube 22 can be realized through the fixing part 4, the photovoltaic cell 11 and the vacuum heat collecting tube 22 can be firmly connected, the photovoltaic cell 11 can be supported through the inner tube 221, and the fixing part 4 has the advantages of convenience in installation and disassembly. Evacuated collector tube 22 may be fixedly mounted by a truss (not shown), and the detailed structure of the truss is described in the related art and will not be described in detail herein. The fixing portion 4 is made of nichrome, so that the fixing portion 4 has a low thermal conductivity coefficient, and the evacuated collector tube 22 can be prevented from transferring heat to the photovoltaic cell 11 along the fixing portion 4. Meanwhile, the fixing part 4 has a long service life outdoors and in high temperature occasions because the nichrome is corrosion-resistant and high-temperature-resistant.
Referring to fig. 1 and fig. 2, as a specific implementation manner of the present embodiment, the connecting member 43 is hollowed along the axial direction of the inner tube 221, that is, the connecting member 43 is two separated beams, and correspondingly, the bottom end of the first fixing member 41 and the top end of the second fixing member 42 are both provided with openings, and two ends of each beam are respectively connected to the opening at the bottom end of the first fixing member 41 and the opening at the top end of the second fixing member 42, so that the fixing portion 4 forms a closed structure. When the device is installed, the device is sleeved from the axial tail end of the inner end, and the installation can be realized. Each fixing portion 4 further includes a fastener 44, and the fastener 44 is inserted through the connecting member 43 in the radial direction of the inner tube 221. Specifically, bolts are used to be inserted through the two beams of the connecting member 43, so that the second fixing member 42 is tightened on the inner pipe 221.
Referring to fig. 1 and 2, as an embodiment of the present invention, a solar energy comprehensive utilization device 100 for concentrating light, collecting heat and generating electricity further includes a support portion 5. The supporting portion 5 is disposed between the two fixing portions 4, and the supporting portion 5 includes a first supporting member 51 and a second supporting member 52. The first supporting member 51 is frame-shaped, and the first supporting member 51 is sleeved on the photovoltaic cell 11. The first support 51 is bolted to the photovoltaic cell 11. The second supporting member 52 is ring-shaped, and the second supporting member 52 is sleeved on the outer tube 222. The first support 51 is connected to the second support 52, for example, by using a vertical beam or a support beam to connect the first support 51 and the second support 52, the outer tube 222 can bear part of the weight of the photovoltaic cell 11, and the load of the fixing portion 4 can be reduced. The material of the supporting portion 5 is nichrome, so that the supporting portion 5 has a low heat conductivity coefficient, and the evacuated collector tube 22 can be prevented from transferring heat to the photovoltaic cell 11 along the supporting portion 5. Meanwhile, since nichrome is corrosion-resistant and high-temperature-resistant, the support portion 5 has a long service life outdoors and in high-temperature situations.
Referring to fig. 2, as an embodiment of the present invention, the solar energy comprehensive utilization device 100 for collecting light, collecting heat and generating electricity further includes a metal gasket 61 and a resin gasket 62. The metal gasket 61 has a substantially circular ring shape, and one end thereof is opened to facilitate mounting on the inner pipe 221. The metal gasket 61 is clamped between the second fixing member 42 and the inner tube 221, and can fill a gap between the second fixing member 42 and the inner tube 221, so that the connection stability between the second fixing member 42 and the inner tube 221 can be enhanced, and the connection part between the second fixing member 42 and the inner tube 221 can be prevented from shaking. Meanwhile, the metal gasket 61 has a good high temperature resistance, so that the inner tube 221 with a high contact temperature can be prevented from being damaged.
Referring to fig. 1 and 2, the solar energy comprehensive utilization device 100 for collecting light, collecting heat and generating electricity further includes a reflector support part 7, the reflector support part 7 includes a tripod 72 fixedly installed on the ground and a rotating shaft 71 installed on the tripod 72, and the rotating shaft 71 is driven to rotate by a motor. The mirror 21 is mounted on a rotary shaft 71 and is rotatably connected to the rotary shaft 71, and the rotary shaft 71 is rotated to drive the mirror 21 to rotate around the axis of the rotary shaft 71. When the rotating shaft 71 rotates along with the sun, the reflector can track the sun, so that the solar comprehensive utilization device 100 for concentrating light, collecting heat and generating electricity can obtain a better solar incident angle all weather, and the heat collection amount and the generating amount of the solar comprehensive utilization device 100 for concentrating light, collecting heat and generating electricity are improved.
In a specific embodiment, the solar energy comprehensive utilization device 100 for concentrating, collecting and generating heat is applied to a 100MW trough type thermal power station. The total length of the loop of the light-gathering heat-collecting part 2 is about 228km in order to achieve a predetermined power generation. The loop working medium of the light-gathering heat-collecting part 2 adopts fused salt (a mixture of sodium nitrate and potassium nitrate), the fused salt flows inside the inner tube 221 of the evacuated collector tube 22 and absorbs the heat of the inner tube 221, and the temperature gradually rises along the length of the loop. The temperature of the fused salt at the inlet of the loop is 230 ℃, the temperature at the outlet of the loop is 550 ℃, and the flow rate of the working medium is 5 kg/s. The vacuum heat collecting tube 22 adopts a PTR70 heat collecting tube produced by Schottky corporation of Germany enterprises, and the reflector 21 adopts a European groove ET100 series. The optical efficiency of the existing trough type light-gathering and heat-collecting device is about 0.736. According to the calculation, the optical efficiency of the light-collecting and heat-collecting part 2 in the solar energy comprehensive utilization device 100 for light-collecting and heat-generating of the present application is reduced to 0.726. The photovoltaic cell 11 of the photovoltaic power generation part 1 is a monocrystalline silicon cell, the size of the single photovoltaic cell 11 is 70 x 70mm, and the photoelectric conversion efficiency of the cell is 0.17. Setting the environmental parameters as follows: the direct solar radiation irradiates 600W/m2, the ambient temperature is 25 ℃, and the wind speed is 0 m/s. It should be noted that the calculation of the present embodiment comprehensively considers the influence factors of the machining and installation of the actual engineering process. Through calculation, the heat collection efficiency of the existing trough type light-gathering heat collection device and the light-gathering heat collection part 2 of the application in a heat collection loop is 0.659 and 0.660 respectively, namely the heat collection efficiency of the light-gathering heat collection part 2 of the application is improved by about 0.1 percent on the basis of the existing trough type light-gathering heat collection device. Converted into the generated power, the generated powers of the existing trough-type light-concentrating heat-collecting device and the light-concentrating heat-collecting part 2 of the present application are 100.00MW and 100.16MW, respectively, i.e., the generated power of the light-concentrating heat-collecting part 2 of the present application will be increased by 0.16 MW. In addition, the new system is provided with the photovoltaic power generation part 1, and the power generation power of the monocrystalline silicon cell of the photovoltaic power generation part 1 can be calculated to be 1.63 MW. In conclusion, compared with the conventional trough type light-gathering and heat-collecting device, the solar comprehensive utilization device 100 for light-gathering, heat-collecting and power generation can effectively increase the power by 1.79 MW.
In summary, the present invention provides a solar energy comprehensive utilization device 100 for concentrating, collecting and generating light, wherein the photovoltaic power generation part 1 of the solar energy comprehensive utilization device 100 is arranged on the side of the concentrating and heat collecting part 2 facing the sun, so that, in a high temperature state, the photovoltaic power generation part 1 can not only convert solar energy into electric energy, but also the photovoltaic power generation part 1 can effectively reduce the heat radiation from the concentrating and heat collecting part 2 to the outside on the side facing the sun, and can reduce the heat loss of the concentrating and heat collecting part 2. The light reflecting portion 3 is provided between the light-condensing heat collecting portion 2 and the photovoltaic power generation portion 1, and can prevent the light condensed by the light-condensing heat collecting portion 2 from being partially irradiated onto the photovoltaic power generation portion 1, and can prevent the photovoltaic power generation portion 1 from being damaged. Meanwhile, the reflecting part 3 can reflect the heat radiation of the light-gathering heat-collecting part 2, so that the lost heat radiation can be reflected again, and the lost heat can be recovered by the light-gathering heat-collecting part 2.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Naturally, the above-mentioned embodiments of the present invention are described in detail, but it should not be understood that the scope of the present invention is limited thereby, and other various embodiments of the present invention can be obtained by those skilled in the art without any inventive work based on the present embodiments, and the scope of the present invention is defined by the appended claims.
Claims (10)
1. A solar energy comprehensive utilization device for concentrating light, collecting heat and generating electricity is characterized by comprising:
the light-gathering heat-collecting part is used for gathering solar light energy to generate heat;
the photovoltaic power generation part is arranged on one side of the light and heat collecting part facing the sun; the photovoltaic power generation part is used for converting light energy into electric energy;
a light reflecting portion disposed between the light condensing and heat collecting portion and the photovoltaic power generating portion; the light reflecting part is used for reflecting light.
2. The device for comprehensively utilizing solar energy for concentrating light, collecting heat and generating electricity according to claim 1, wherein the light reflecting portion is attached to the side surface of the photovoltaic power generation portion facing the light concentrating and heat collecting portion.
3. The device for comprehensively utilizing solar energy for concentrating and collecting heat and generating electricity according to claim 2, wherein the size of the light reflecting portion is equal to the size of the side surface of the photovoltaic power generation portion facing the concentrating and heat collecting portion.
4. The solar energy complex utilization device for concentrating light, collecting heat and generating electricity according to claim 3, wherein the light reflecting portion is shaped like a film.
5. The device for comprehensively utilizing solar energy for concentrating, collecting and generating heat according to claim 1, wherein the concentrating and heat collecting part comprises a reflector disposed toward the photovoltaic power generating part and an evacuated collector tube disposed between the reflector and the photovoltaic power generating part;
the vacuum heat collecting tube comprises an outer tube and an inner tube positioned on the inner side of the outer tube, and a vacuum state is formed between the outer tube and the inner tube.
6. The solar energy comprehensive utilization device for concentrating heat and generating power according to claim 5, wherein the width of the photovoltaic power generation part is between the diameter of the inner pipe and the diameter of the outer pipe;
the photovoltaic power generation part comprises a plurality of photovoltaic cells, and the photovoltaic cells are connected in a splicing mode.
7. The device for comprehensively utilizing solar energy for concentrating heat and generating power according to claim 6, wherein both ends of the inner tube in the axial direction are extended outwards beyond the outer tube;
the solar comprehensive utilization device for concentrating light, collecting heat and generating electricity further comprises fixing parts, wherein the fixing parts are arranged at two axial ends of the inner pipe;
the fixing part comprises a first fixing part, a second fixing part and a connecting part for connecting the first fixing part and the second fixing part, the first fixing part is sleeved on the photovoltaic cell, and the second fixing part is sleeved on the inner tube.
8. The device for comprehensively utilizing solar energy for concentrating heat and generating power according to claim 7, wherein the connecting piece is hollowed out along the axial direction of the inner tube;
each fixed part still all includes the fastener, the fastener is along the radial of inner tube is worn to establish on the connecting piece.
9. The concentrating, heat collecting and power generating solar energy complex using apparatus according to claim 7, further comprising a support part;
the supporting part is arranged between the two fixing parts and comprises a first supporting part and a second supporting part, the first supporting part is sleeved on the photovoltaic cell, the second supporting part is sleeved on the outer tube, and the first supporting part is connected with the second supporting part.
10. The light-concentrating, heat-collecting and power-generating solar complex apparatus according to claim 9, further comprising a metal gasket and a resin gasket;
the metal gasket is clamped between the second fixing piece and the inner pipe;
the resin gaskets are clamped between the first fixing piece and the photovoltaic cell, between the first supporting piece and the photovoltaic cell, and between the second supporting piece and the outer tube.
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| FR2472146A1 (en) * | 1978-12-22 | 1981-06-26 | Simon Michael | SOLAR ENERGY CONVERSION INSTALLATION |
| CN201893726U (en) * | 2010-10-29 | 2011-07-06 | 戴冬宜 | High-concentration solar power generation and heat collection device |
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