CN101534077A - Solar energy thermo-electric generation device - Google Patents

Solar energy thermo-electric generation device Download PDF

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Publication number
CN101534077A
CN101534077A CN 200910097076 CN200910097076A CN101534077A CN 101534077 A CN101534077 A CN 101534077A CN 200910097076 CN200910097076 CN 200910097076 CN 200910097076 A CN200910097076 A CN 200910097076A CN 101534077 A CN101534077 A CN 101534077A
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CN
China
Prior art keywords
thermoelectric cell
heat
cooling line
solar energy
temperature difference
Prior art date
Application number
CN 200910097076
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Chinese (zh)
Inventor
王勇
Original Assignee
浙江大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 浙江大学 filed Critical 浙江大学
Priority to CN 200910097076 priority Critical patent/CN101534077A/en
Publication of CN101534077A publication Critical patent/CN101534077A/en

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy

Abstract

The invention provides a solar energy thermo-electric generation device, which is composed of a solar thermal collector, a thermoelectric cell, a cooling pipeline and a radiating system, wherein, the cooling pipeline and the thermoelectric cell adhered to the surface thereof are positioned within the solar thermal collector, and the radiating system is connected with the cooling pipeline. In the meantime, the cool end of the thermoelectric cell is contacted with the outer surface of the cooling pipeline, and the hot end of the thermoelectric cell is contacted with the inner surface of the solar thermal collector. The invention solves the heating problem of the hot end and the cooling problem of the cool end of the thermoelectric cell, integrates the generation device with the solar thermal collector skillfully, improves the utilization rate of solar energy and reduces the cost of the solar energy generation.

Description

Solar energy temperature difference generating set

Technical field

The present invention relates to a kind of temperature difference electricity generation device, particularly a kind of temperature difference electricity generation device that utilizes solar energy belongs to the development and use field of new forms of energy.

Background technology

In thermoelectric cell when generating, need keep the enough big temperature difference in the battery both sides, just can obtain big output electric energy, thus thermoelectric cell at present as a supplement generation mode be applied to cogeneration or low power Blast Furnace Top Gas Recovery Turbine Unit (TRT).Because the energy density of solar energy does not reach the temperature difference requirement of semiconductor temperature difference battery for a short time, solar energy only is limited to thermo-mechanical power generation and solar cell power generation is used, so thermoelectric cell seldom is utilized on solar energy generation technology.And utilize thermoelectric cell (claiming the thermo-electric generation sheet) to generate electricity, can solve the high problem of cost of traditional solar energy generation technology.

Summary of the invention

The invention provides a kind of solar energy temperature difference generating set, the heating problems in thermoelectric cell hot junction and the cooling problem of cold junction have been solved, itself and solar collector are combined dexterously, improved the utilization ratio of solar energy, reduced the cost of solar power generation.

A kind of solar energy temperature difference generating set, the solar collector that comprises the tubular that is built-in with thermoelectric cell, be provided with cooling line in the described solar collector, described thermoelectric cell is distributed in around the cooling line, the outer surface contact heat-exchanging of the cold junction of thermoelectric cell and cooling line, the inner surface contact heat-exchanging of the hot junction of thermoelectric cell and solar collector.

The shape of the cold junction of described thermoelectric cell and the outer surface of cooling line can be different, also can be identical, when both shapes not simultaneously, described cooling line is with sleeve pipe outward, the shape of the surfaces externally and internally of sleeve pipe is corresponding with the cold junction of cooling line and thermoelectric cell respectively, and (the cold junction shape of bushing outer surface and thermoelectric cell is corresponding, internal surface of casing is corresponding with the cooling line shape), can increase contact area, be more conducive to heat conduction.

As preferably, between the outer surface of the cold junction of thermoelectric cell and cooling line, scribble one deck conduction material.Can fill the slit of part, contact site like this and further improve heat-conducting effect, conduction material can adopt prior aries such as heat conductive silica gel.When being with sleeve pipe outside the cooling line, between the outer surface of the sleeve pipe of the cold junction of thermoelectric cell and cooling line, scribble one deck conduction material.

As preferably, described thermoelectric cell is some and is distributed in around the cooling line, and some thermoelectric cells can serial or parallel connection, satisfies more out-put supply demand

As preferably, be filled with heat-barrier material between two adjoining thermoelectric cells, can avoid unnecessary heat conduction with thoroughly isolating between cooling line and the solar collector like this.Heat-barrier material can be selected commercially available foam or porous material for use.As further preferred, the two ends of solar collector are filled with heat-barrier material, thoroughly avoid cold junction and the thermal radiation between the hot junction and the heat conduction of thermoelectric cell, thereby keep the cold junction of thermoelectric cell and the maximum temperature difference between the hot junction.

As preferably, be filled with heat carrier between the hot junction of described thermoelectric cell and the solar collector inner surface, heat carrier generally can be selected copper sheet or copper billet for use.The one side of heat carrier and the hot junction of thermoelectric cell are close to, and the another side of heat carrier pastes mutually with the inner surface of solar collector inside.Heat carrier can increase the contact area that need carry out heat-exchanging part, is more conducive to heat conduction.

Among the present invention, solar collector can be solar vacuum heat-collecting pipe or other solar energy heat collector, and the present invention preferably adopts solar vacuum heat-collecting pipe.Solar vacuum heat-collecting pipe can adopt prior art, and its heat-collecting part is arranged in the cylindrical wall of solar collector.

The solar collector of tubular can be cylinder or square tube, also can be the structure of end sealing.

Keep relative temperature lower for ease of cooling line, be provided with the cooling system that links to each other with described cooling line.Described cooling line can be airtight heat pipe or unsealed cooling line.

Among the present invention, cooling system can be air-cooled, water-cooled or other cooling system, and cooling system can communicate with the inside of cooling line, also can place the cooling line outside.

For satisfying the job requirement of cooling line, whole device can with the angled placement of horizontal plane, also can horizontal positioned, decide on the requirement of cooling line.

Solar energy temperature difference generating set of the present invention has the following advantages:

Thermoelectric cell places the inside of solar collector, and the hot junction of thermoelectric cell is heated fully; The cold junction of thermoelectric cell is close to cooling line simultaneously, and cooling line can be taken away the heat of the cold junction of thermoelectric cell very soon, thereby keeps the temperature of cold junction unlikely too high; Cooling line links to each other with the cooling system of the outside that is positioned at solar collector again, can further improve the heat exchanger effectiveness of cooling line.Design of the present invention makes the hot junction of thermoelectric cell keep high as far as possible temperature, and the opposite side and the cold junction of thermoelectric cell cooled off to keep alap temperature, solar energy is fully utilized, has improved the efficient of thermoelectric cell, reduced the cost of solar power generation.

Description of drawings

Fig. 1 is a solar energy pipe differential temperature electricity generating system cross-sectional view of the present invention.

Fig. 2 is an A-A cutaway view among Fig. 1.

Fig. 3 is the schematic diagram of the another kind of execution mode of solar energy pipe differential temperature electricity generating system of the present invention.

Fig. 4 is the schematic diagram of the third execution mode of solar energy pipe differential temperature electricity generating system of the present invention.

Embodiment

Referring to Fig. 1,2, solar energy temperature difference generating set of the present invention comprises the solar collector 1 of the tubular that is built-in with thermoelectric cell 2 being provided with cooling line 3 in the solar collector 1, the outside is provided with the cooling system 4 that links to each other with cooling line 3, and cooling system 4 communicates with the inside of cooling line 3.

Solar collector 1 is a solar vacuum heat-collecting pipe.

Thermoelectric cell 2 has four and is distributed in around the cooling line 3, the cold junction 21 of each thermoelectric cell 2 and the outer surface contact heat-exchanging of cooling line 3, the hot junction 22 of thermoelectric cell 2 and the inner surface contact heat-exchanging of solar collector 1.

Be with sleeve pipe 31 outside the cooling line 3, cold junction 21 shapes of sleeve pipe 31 outer surfaces and thermoelectric cell 2 are corresponding, and sleeve pipe 31 inner surfaces are corresponding with cooling line 3 shapes.Scribble one deck conduction material 32 between the cold junction 21 of thermoelectric cell 2 and the outer surface of cooling line 3.

Be filled with heat-barrier material 33 between two adjoining thermoelectric cells 2, the two ends of solar collector 1 distribute and are filled with heat-barrier material 33a and heat-barrier material 33b.

Be filled with heat carrier 34 between the hot junction 22 of thermoelectric cell 2 and solar collector 1 inner surface.

Fig. 3 has provided the schematic diagram of another embodiment of the invention, and it comprises solar collector 1, thermoelectric cell 2, cooling line 3, cooling system 4, sleeve pipe 31, heat-barrier material 33a, heat-barrier material 33b and heat carrier 34.

Solar collector 1 adopts U type solar vacuum heat-collecting pipe commonly used in the solar water heater, and cooling line 3 uses super heat-conductive pipe, and cooling system 4 is a water tank.Super heat-conductive pipe is put into sleeve pipe 31, the cold junction 21 of thermoelectric cell 2 be close to sleeve pipe 31 around.

Super heat-conductive pipe, sleeve pipe 31 and thermoelectric cell 2 are positioned in the U type solar vacuum heat-collecting pipe together.The one side of heat carrier 34 is close in the hot junction 22 of thermoelectric cell 2, and the another side of heat carrier 34 is close to the medial surface of U type solar vacuum heat-collecting pipe, and heat carrier 34 uses the metal copper sheet to fold and forms.

It is in the water tank that the condensation end 42 of super heat-conductive pipe is positioned over cooling system 4.

The angled placement of whole device and horizontal plane, the requirement when the placement angle satisfies super heat-conductive pipe work gets final product.

During device work, vacuum heat collection pipe is converted into heat to the sunlight of direct projection, scattering and the reflection of other reflecting surface, and heat transferred is arrived the hot junction 22 of thermoelectric cell 2 by heat carrier 34.Thereby make the thermoelectric cell 2 generation electric energy of starting working.In order to make the thermoelectric cell 2 can operate as normal, should keep the hot junction of thermoelectric cell 2 and cold junction that enough temperature difference are arranged.Because thermoelectric cell 2 itself has heat-transfer character, along with the temperature in the hot junction 22 of thermoelectric cell 2 raises, the temperature of the cold junction 21 of thermoelectric cell 2 also can raise, can be delivered to the evaporation ends 41 of super heat-conductive pipe by sleeve pipe 31 when the heat of the cold junction 21 of thermoelectric cell 2, the interior working medium of super heat-conductive pipe this moment will be subjected to thermal evaporation to become gaseous state, the upper end that the working medium of gaseous state can be gone to super heat-conductive pipe is a condensation end 42, condensation end 42 is cooled off by cooling system 4, and the working medium of gaseous state can become liquid state again in the super heat-conductive pipe like this.Be subjected to the effect of gravity, liquid refrigerant can fail to be convened for lack of a quorum to the evaporation ends 41 of super heat-conductive pipe again and be heated evaporation and condensation again, so constantly circulates, and constantly takes away the heat of thermoelectric cell cold junction 21, thereby guaranteed to hold the temperature difference of thermoelectric cell hot junction 22 and cold junction 21, made its normal power generation.

Fig. 4 has provided the schematic diagram of another embodiment of the present invention, and it comprises solar collector 1, thermoelectric cell 2, cooling line 3, cooling system 4, sleeve pipe 31, heat-barrier material 33a, heat carrier 34.

Solar collector 1 adopts through-type solar vacuum heat-collecting pipe, and cooling line 3 uses the structure of loop, and cooling system 4 is a water tank, and it and cooling line 3 link together.

Cooling line 3 is put into sleeve pipe 31, the cold junction 21 of thermoelectric cell 2 be close to sleeve pipe 31 around.

Cooling line 3, sleeve pipe 31 and thermoelectric cell 2 are positioned in the through-type solar vacuum heat-collecting pipe together.The one side of heat carrier 34 is close in the hot junction 22 of thermoelectric cell 2, and the another side of heat carrier 34 is close to the medial surface of through-type solar vacuum heat-collecting pipe, and heat carrier 34 uses the metal copper sheet to fold and forms.

During device work, vacuum heat collection pipe is converted into heat to the sunlight of direct projection, scattering and the reflection of other reflecting surface, and heat transferred is arrived the hot junction 22 of thermoelectric cell 2 by heat carrier 34.Thereby make the thermoelectric cell 2 generation electric energy of starting working.In order to make the thermoelectric cell 2 can operate as normal, should keep the hot junction 22 of thermoelectric cell 2 and cold junction 21 that enough temperature difference are arranged.Because thermoelectric cell 2 itself has heat-transfer character, along with the temperature in the hot junction 22 of thermoelectric cell 2 raises, the temperature of the cold junction 21 of thermoelectric cell 2 also can raise, when the heat of the cold junction 21 of thermoelectric cell 2 can be delivered on the cooling line 3 by sleeve pipe 31, the rising of will expanding after this moment, the working medium in the cooling line was heated, enter cooling water tank and be cooled, cooled working medium will flow back in the cooling line.In order to improve the flow velocity of working medium, can make the angled placement of whole device and horizontal plane, utilize gravity that working medium is flowed, also can a little water pump be installed in the inside of cooling line, help flowing of working medium.

Flowing of working medium constantly taken away the heat of thermoelectric cell cold junction 21, thereby the temperature difference that has guaranteed to hold thermoelectric cell hot junction 22 and cold junction 21 makes its normal power generation.In order to improve radiating efficiency, cooling line can also adopt snakelike many kinkings structure.

What more than enumerate only is several specific embodiments of the present invention; the invention is not restricted to above embodiment; many distortion can also be arranged, and all distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.

Claims (8)

1, a kind of solar energy temperature difference generating set, the solar collector (1) that comprises the tubular that is built-in with thermoelectric cell (2), it is characterized in that: be provided with cooling line (3) in the described solar collector (1), described thermoelectric cell (2) is distributed in cooling line (3) all around, the cold junction (21) of thermoelectric cell (2) and the outer surface contact heat-exchanging of cooling line (3), the hot junction (22) of thermoelectric cell (2) and the inner surface contact heat-exchanging of solar collector (1).
2, solar energy temperature difference generating set according to claim 1, it is characterized in that: the outer sleeve pipe (31) that is with of described cooling line (3), cold junction (21) shape of sleeve pipe (31) outer surface and thermoelectric cell (2) is corresponding, and sleeve pipe (31) inner surface is corresponding with cooling line (3) shape.
3, solar energy temperature difference generating set according to claim 1 is characterized in that: scribble one deck conduction material (32) between the cold junction (21) of described thermoelectric cell (2) and the outer surface of cooling line (3).
4, solar energy temperature difference generating set according to claim 1 is characterized in that: described thermoelectric cell (2) is distributed in cooling line (3) all around for some, is filled with heat-barrier material (33) between adjoining two thermoelectric cells (2).
5, solar energy temperature difference generating set according to claim 4 is characterized in that: the two ends of described solar collector (1) are filled with heat-barrier material (33a, 33b).
6, solar energy temperature difference generating set according to claim 1 is characterized in that: be filled with heat carrier (34) between the hot junction (22) of described thermoelectric cell (2) and solar collector (1) inner surface.
7, according to each described solar energy temperature difference generating set of claim 1~5, it is characterized in that: described solar collector (1) is a solar vacuum heat-collecting pipe.
8, according to each described solar energy temperature difference generating set of claim 1~5, it is characterized in that: be provided with the cooling system (4) that links to each other with described cooling line (3).
CN 200910097076 2009-03-31 2009-03-31 Solar energy thermo-electric generation device CN101534077A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011091620A1 (en) * 2010-01-29 2011-08-04 中国科学院广州能源研究所 System for thermoelectric converting type solar thermal power generation
WO2011160293A1 (en) * 2010-06-23 2011-12-29 常州天合光能有限公司 Efficient heat shield for silicon single crystal furnace
CN102355168A (en) * 2011-09-30 2012-02-15 广东工业大学 Solar energy temperature difference generation device
CN102487259A (en) * 2009-10-15 2012-06-06 何仁城 Method and device for generating power by using temperature difference
CN102721202A (en) * 2012-06-08 2012-10-10 无锡旭能光热电能源有限公司 Bi-pass thermovoltaic vacuum tube
CN102748881A (en) * 2012-05-28 2012-10-24 无锡旭能光热电能源有限公司 Inner condensation thermovoltaic vacuum tube
CN102889696A (en) * 2012-10-26 2013-01-23 华北电力大学 Pyroelectric co-production device of solar water heater
CN104025327A (en) * 2011-12-26 2014-09-03 中沼忠司 Thermoelectric generator
CN104390502A (en) * 2014-11-06 2015-03-04 吴速 Composite heat pipe
CN106160579A (en) * 2014-09-01 2016-11-23 现代自动车株式会社 Vehicle thermoelectric generating device
CN106412017A (en) * 2016-08-31 2017-02-15 重庆伟睿科技有限公司 Adjacent pushing system
CN107733286A (en) * 2017-11-15 2018-02-23 肇庆市高新区晓靖科技有限公司 A kind of temperature difference electricity generation device using solar energy

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102487259A (en) * 2009-10-15 2012-06-06 何仁城 Method and device for generating power by using temperature difference
WO2011091620A1 (en) * 2010-01-29 2011-08-04 中国科学院广州能源研究所 System for thermoelectric converting type solar thermal power generation
WO2011160293A1 (en) * 2010-06-23 2011-12-29 常州天合光能有限公司 Efficient heat shield for silicon single crystal furnace
CN102355168A (en) * 2011-09-30 2012-02-15 广东工业大学 Solar energy temperature difference generation device
CN102355168B (en) * 2011-09-30 2014-04-02 广东工业大学 Solar energy temperature difference generation device
CN104025327B (en) * 2011-12-26 2017-02-22 中沼忠司 Thermoelectric generator
CN106340583A (en) * 2011-12-26 2017-01-18 中沼忠司 Thermoelectric generator
CN104025327A (en) * 2011-12-26 2014-09-03 中沼忠司 Thermoelectric generator
CN106340583B (en) * 2011-12-26 2018-10-30 中沼忠司 Thermoelectric generating device
CN102748881A (en) * 2012-05-28 2012-10-24 无锡旭能光热电能源有限公司 Inner condensation thermovoltaic vacuum tube
CN102721202A (en) * 2012-06-08 2012-10-10 无锡旭能光热电能源有限公司 Bi-pass thermovoltaic vacuum tube
CN102889696A (en) * 2012-10-26 2013-01-23 华北电力大学 Pyroelectric co-production device of solar water heater
CN106160579A (en) * 2014-09-01 2016-11-23 现代自动车株式会社 Vehicle thermoelectric generating device
CN104390502A (en) * 2014-11-06 2015-03-04 吴速 Composite heat pipe
CN106412017A (en) * 2016-08-31 2017-02-15 重庆伟睿科技有限公司 Adjacent pushing system
CN107733286A (en) * 2017-11-15 2018-02-23 肇庆市高新区晓靖科技有限公司 A kind of temperature difference electricity generation device using solar energy

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Open date: 20090916