CN106196655B - A kind of displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating - Google Patents

A kind of displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating Download PDF

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Publication number
CN106196655B
CN106196655B CN201610803966.8A CN201610803966A CN106196655B CN 106196655 B CN106196655 B CN 106196655B CN 201610803966 A CN201610803966 A CN 201610803966A CN 106196655 B CN106196655 B CN 106196655B
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canister
solar energy
cavity
extinction
power
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CN201610803966.8A
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CN106196655A (en
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颜健
彭佑多
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Hunan University of Science and Technology
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Hunan University of Science and Technology
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00Solar heat collectors using working fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00Solar heat collectors specially adapted for particular uses or environments
    • F24S20/20Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S40/00Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
    • F24S40/50Preventing overheating or overpressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S70/00Details of absorbing elements
    • F24S70/10Details of absorbing elements characterised by the absorbing material
    • F24S70/16Details of absorbing elements characterised by the absorbing material made of ceramic; made of concrete; made of natural stone
    • 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, e.g. solar towers
    • Y02E10/44Heat exchange systems

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  • 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)
  • Ceramic Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention discloses a kind of displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating, including heat absorption carrier, thermal insulator and canister;It is characterized in that:Thermal insulator is located at the outside of canister, the front opening of canister, and front end and is provided with solar energy collecting portion, and canister is provided with air inlet pipe, escape pipe and extinction cavity, and air inlet pipe connects with the inner chamber of canister;Extinction cavity is located at the interior intracavitary of canister, is connected with solar energy collecting portion, the opening direction that extinction cavity projects towards solar energy;Described heat absorption carrier is located in canister;Canister inner chamber forms a closed heat absorber cavity with heat absorption carrier, and escape pipe connects with heat absorber cavity.The solar thermal energy receiving surface of the present invention arranges some extinction cavitys with pocket surfaces, by increasing capacitance it is possible to increase the foamed ceramics heat absorption carrier of porous media and the contact area of extinction cavity, improves heat conductivility;The radiation heat loss of heat dump can be reduced simultaneously.

Description

A kind of displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating
Technical field
The invention belongs to solar light-heat power-generation high temperature air heat dump technical field, a kind of solar energy is specifically related to The displacement air heat dump that heat generates electricity with more pocket surfaces.
Background technology
Solar light-heat power-generation technical field, because the energy-flux density of the Radiation resource of solar energy is low, it is impossible to carry out straight The collection connect utilizes, and must often gather the solar energy of large area and photothermal deformation is carried out in heat dump, makes to flow in heat dump Dynamic working medium obtains heat energy, promotes thermoelectric conversion device work by HTHP working medium, then realizes and be converted to solar energy Electric energy exports.
Heat dump is the core apparatus of solar energy-working medium heat energy conversion, and the operation to whole solar energy thermo-power station is imitated Rate influences notable.In order to effectively lift the efficiency of solar light-heat power-generation, generally by improve air working medium pressure and Temperature, this heat dump for just needing to configure can bear HTHP.In high temperature solar air heat-absorbing device, using more It is displacement air heat dump, he is the matrix that heat dump structure is formed using three-dimensional porous dielectric material, passes through porous media Material absorbs solar heat energy, and the air working medium flowed directly carries out heat convection with matrix, and then obtains air working medium Heat energy, this positive displacement heat dump require high in high-voltage operation to the sealing property of heat dump structure.Further, since concentrator supplies The solar energy density given is huge, and energy flow distribution is uneven, easily on the receiving plane of heat dump or inside heat dump Porous media matrix forms high temperature difference, easily causes the damage of heat dump.
In terms of the high-voltage operation of displacement air heat dump, have by heat dump opening surface install quartz window and then Confined space is formed, though a certain degree of raising operating pressure of energy, quartz window easily damages in the presence of high moderate pressure It is bad, and sealing effectiveness is limited.Closed structure is formed also by by tight porous media material, such as prior art (CN 101307956 A) in propose using compact silicon carbide ceramic as pressure-bearing air chamber, the operating pressure of such a air heat-absorbing device can reach To more than 1Mpa, but 8 ~ 10 Mpa of running situation to(for) high pressure, may more difficult adaptation.In the diabatic process of heat dump, Be by heat dump inside receiving plane receive solar energy, then carry out heat conduction transmission, and air by porous media carrier The heat energy transmission of Working fluid flow process, the Temperature Distribution of porous media carrier is uneven, is generally close to the temperature of receiving plane Degree is high, and the temperature of air working medium outlet port is low.Temperature distributing disproportionation inside heat dump is even, easily causes porous media material The thermal ablation of material, and certain influence be present to the heat exchange efficiency of internal air working medium.In order to effectively improve the equal of Temperature Distribution Even property, the air working medium operating pressure of heat dump and temperature are, it is necessary to propose the displacement air heat dump of new construction.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provide it is a kind of enable to air heat-absorbing device exchange capability of heat it is stronger, And it is capable of the displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating of output high temperature and high pressure gas;The heat dump by In arranging some extinction cavitys, the Temperature Distribution of its internal porous media heat absorption carrier can be made evenly, and can have The raising operational reliability and thermal performance of effect.
The technical solution adopted by the present invention is:A kind of solar energy thermal-power-generating displacement air of more pocket surfaces absorbs heat Device, including heat absorption carrier, thermal insulator and canister;It is characterized in that:Thermal insulator is located at the outside of canister, canister Front opening, and front end is provided with solar energy collecting portion, and canister is provided with air inlet pipe, escape pipe and extinction cavity, air inlet Pipe connects with the inner chamber of canister;Extinction cavity is located at the interior intracavitary of canister, is connected with solar energy collecting portion, extinction chamber The opening direction that body projects towards solar energy;Described heat absorption carrier is located in canister;Canister inner chamber and heat absorption Carrier forms a closed heat absorber cavity, and escape pipe connects with heat absorber cavity.
Above-mentioned solar energy thermal-power-generating is with the displacement air heat dump of more pocket surfaces, described solar energy collecting portion For secondary condenser, secondary condenser is arranged on the front end of canister, and the outside of secondary condenser is provided with thermal insulator.
Above-mentioned solar energy thermal-power-generating is with the displacement air heat dump of more pocket surfaces, before described canister End face is the composite cavity to absorb solar energy, uniformly or according to sunshine distribution situation come cloth on the curved surface of composite cavity Put some extinction cavitys.
With in the displacement air heat dump of more pocket surfaces, the front end of secondary condenser is set above-mentioned solar energy thermal-power-generating There is quartz window.
Above-mentioned solar energy thermal-power-generating with the displacement air heat dump of more pocket surfaces, described extinction cavity be by The curved cavity that entering light section and the combination of guide-lighting section are formed.
With in the displacement air heat dump of more pocket surfaces, described canister uses above-mentioned solar energy thermal-power-generating Resistant to elevated temperatures metal material is made.
For above-mentioned solar energy thermal-power-generating with the displacement air heat dump of more pocket surfaces, described heat absorption carrier is more The foam silicon carbide ceramics of hole medium, described heat absorption carrier are arranged in the inner chamber front end of canister, heat absorption carrier and metal The extinction housing surface of container is brought into close contact;Described extinction cavity front end and front end seal plate welding.
Above-mentioned solar energy thermal-power-generating with the displacement air heat dump of more pocket surfaces, described extinction cavity it is several What shape can be cylindrical cavity, back taper chamber or combination chamber, and described combination chamber is combined by back taper structure and cylindrical cavity.
Above-mentioned solar energy thermal-power-generating is with the displacement air heat dump of more pocket surfaces, before described canister End surfaces and the afterbody of secondary condenser leave gap.
Above-mentioned solar energy thermal-power-generating is with the displacement air heat dump of more pocket surfaces, in described canister Heat absorption carrier is made up of multistage, and Turbogrid plates are provided between adjacent two sections, some circular holes are provided with described Turbogrid plates.
Compared with prior art, the beneficial effects of the invention are as follows:
1st, present invention employs resistant to elevated temperatures canister so that internal air working medium can be operated in higher pressure Under hot conditions, the follow-up acting ability of working medium is effectively improved.
2nd, solar thermal energy receiving surface of the invention arranges some extinction cavitys with pocket surfaces, can make aggregation Solar energy transmitted along pocket surfaces, the foamed ceramics heat absorption carrier of porous media and extinction cavity can be increased Contact area, help to lift heat conductivility.And the pocket surfaces of extinction cavity easily form Hohlraum radiation, help to reduce and inhale The radiation heat loss of hot device.
3rd, the present invention can combine the solar energy distribution situation of aggregation, the position of preferred arrangement extinction cavity, can cause Uniformity of temperature profile inside heat dump;Because extinction cavity is inserted in the inside of heat absorption carrier, effectively improves heat absorption and carry The thermal response effect of body, while the temperature homogeneity of heat absorption carrier is also improved, effectively lift the heat-exchange performance of inner air working medium Energy.
Brief description of the drawings
Fig. 1 is the structural representation of embodiments of the invention 1.
Fig. 2 is the structural representation of embodiments of the invention 2.
Fig. 3 is embodiments of the invention 1 and the metal container structures schematic diagram of embodiment 2.
Fig. 4 is the structural representation of embodiments of the invention 3.
Fig. 5 is the structural representation of the cylindrical cavity extinction cavity of the present invention.
Fig. 6 is the structural representation of the back taper chamber extinction cavity of the present invention.
Fig. 7 is the structural representation of the combination chamber extinction cavity of the present invention.
1-thermal insulator, 2-air inlet pipe, 3-metal shell, 4-Turbogrid plates, 5-air inlet pipe, 6-escape pipe, 7-heat absorption Device cavity, 8-volume heat dump, 9-extinction cavity, 10-secondary condenser, 11-quartz window, 12-entering light section, 13-lead Light section, 14-preceding end-plate, 15-composite cavity.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
Embodiment 1
As shown in figure 1, the present invention includes being used for secondary condenser 10, heat absorption carrier 5, the thermal insulator 1 for assembling solar energy With the canister 3 for forming closed heat absorber cavity 7.The front opening of canister 3, and front end and secondary condenser 10 Rear end connects.The outside of canister 3 and secondary condenser 10 is provided with thermal insulator 1.Canister 3 is provided with air inlet pipe 2, outlet Pipe 6, extinction cavity 9 and preceding end-plate 14, air inlet pipe 2 connect with the inner chamber of canister;Extinction cavity 9 is located at canister 3 Interior intracavitary, connected with secondary condenser 10, the opening direction that extinction cavity 9 projects towards solar energy, before extinction cavity 9 Welded with preceding end-plate 14 at end.Described heat absorption carrier 5 is arranged in the inside of canister 3, is close to canister 3 and extinction The surface of cavity 9.The inner chamber of canister 3 forms a closed heat absorber cavity 7, escape pipe 6 and heat dump chamber with heat absorption carrier 5 Body 7 connects.Described extinction cavity 9 is to form curved cavity, described extinction cavity 9 by entering light section 12 and the combination of guide-lighting section 13 The surface that solar energy is received along the front end face of canister 3 is evenly arranged, and for receiving the solar energy of aggregation, makes solar energy Reflected or diffusing reflection transmission in the inner re-entrant surfaces of extinction cavity 9.
As shown in figures 1 and 3, described canister 3 is using resistant to elevated temperatures metal or resistant to elevated temperatures gold such as stainless steel, tungsten Belong to the materials such as alloy, the extinction cavity 9 of the canister 3 directly receives parabolic dish type concentrator or secondary condenser 10 is anti- The solar energy of aggregation is penetrated, extinction cavity 9 is located at the front end face of canister 3, and extinction cavity 9 is opened towards what solar energy projected Mouth position.
Described heat absorption carrier 5 is the foam silicon carbide ceramics of porous media, and described heat absorption carrier 5 is arranged in closed In heat absorber cavity 7, the surface of extinction cavity 9 of heat absorption carrier 5 and canister 3 is brought into close contact during shaping, enhancing The capacity of heat transmission;Described extinction cavity 9 and the preceding welding fabrication of end-plate 14, form closed container.
The front end light inlet position of described secondary condenser 10 is provided with quartz window 11, reduces the convection current heat waste of heat dump Lose;Described thermal insulator 1 is wrapped in the outside of canister 3 and secondary condenser 10, reduces heat loss.
Heat absorption carrier 5 in described canister 3 is made up of multistage, and Turbogrid plates 4, institute are provided between adjacent two sections Some circular holes are provided with the Turbogrid plates 4 stated, the arrangement principle of circular hole is to ensure that flowing of the air working medium in canister 3 is changed Heat energy power strengthens, and makes the temperature of air working medium higher.
Embodiment 2
As shown in Fig. 2 its structure is similar to Example 1, differing only in the front end of canister 3 can also gather with secondary Gap L is left between the afterbody of light device 10, ensure that the energy flow distribution of the front-end surface of canister 3 is uniform.
Embodiment 3
As shown in figure 4, its structure is similar to Example 1, will simply be replaced for the secondary condenser 10 for assembling solar energy The composite cavity 15 being arranged in canister 3 is changed to, uniformly or according to too on the basis of the surface geometry of composite cavity 15 Sunlight distribution situation arranges some extinction cavitys 9.
As illustrated in figs. 5-7, the geometry of described extinction cavity 9 can be cylindrical cavity, back taper chamber and combine chamber, described Combination chamber be to be combined by back taper structure and cylindrical cavity.
Present invention employs resistant to elevated temperatures canister 3 to form enclosed volume so that internal air working medium can work Under higher pressure and hot conditions, the follow-up acting ability of working medium is effectively improved;The present invention receives in solar thermal energy Some extinction cavitys 9 with pocket surfaces of surface layout, can be such that the solar energy of aggregation is passed along pocket surfaces Pass, the foamed ceramics heat absorption carrier 5 of porous media and the contact area of extinction cavity 9 can be increased, help to lift thermal conductivity Energy.And the pocket surfaces of extinction cavity 9 easily form Hohlraum radiation, help to reduce the radiation heat loss of heat dump;In addition, can With reference to the solar energy distribution situation of aggregation, the position of preferred arrangement extinction cavity 9, the temperature point inside the present invention can make it that Cloth is uniform;Because extinction cavity 9 is inserted in the inside of heat absorption carrier 5, the thermal response effect of heat absorption carrier 5 is effectively improved, The temperature homogeneity of heat absorption carrier 5 is also improved simultaneously, effectively lifts the heat exchange property of inner air working medium.

Claims (10)

1. a kind of displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating, including heat absorption carrier(5), thermal insulator (1)And canister(3);It is characterized in that:Thermal insulator(1)It is located at canister(3)Outside, canister(3)Front end Opening, and front end is provided with solar energy collecting portion, canister(3)It is provided with air inlet pipe(2), escape pipe(6)And extinction cavity (9), air inlet pipe(2)Connected with the inner chamber of canister;Extinction cavity(9)It is located at canister(3)Interior intracavitary, with solar energy Aggregation portion connects, extinction cavity(9)Towards the opening direction of solar energy projection;Described heat absorption carrier(5)It is located at metal appearance Device(3)It is interior;Canister(3)Inner chamber and heat absorption carrier(5)Form a closed heat absorber cavity(7), escape pipe(6)With heat absorption Device cavity(7)Connection.
2. the displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating according to claim 1, it is characterized in that: Described solar energy collecting portion is secondary condenser(10), secondary condenser(10)It is secondary poly- installed in the front end of canister Light device(10)Outside be provided with thermal insulator.
3. the displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating according to claim 1, it is characterized in that: Described canister(3)Front end face be the composite cavity to absorb solar energy(15), in composite cavity(15)Curved surface on Arrange uniformly or according to sunshine distribution situation some extinction cavitys(9).
4. the displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating according to claim 2, it is characterized in that: Secondary condenser(10)Front end be provided with quartz window(11).
5. the displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating according to claim 1, it is characterized in that: Described extinction cavity(9)It is by entering light section(12)With guide-lighting section(13)Combine the curved cavity formed.
6. the displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating according to claim 1, it is characterized in that: Described canister(3)It is made of resistant to elevated temperatures metal material.
7. the displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating according to claim 1, it is characterized in that: Described heat absorption carrier(5)For the foam silicon carbide ceramics of porous media, described heat absorption carrier(5)It is arranged in canister (3)Inner chamber front end, heat absorption carrier(5)With canister(3)Extinction cavity(9)Surface is brought into close contact;Described extinction chamber Body(9)Front end and preceding end-plate(14)Welding.
8. the displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating according to claim 1, it is characterized in that: Described extinction cavity(9)Geometry can be cylindrical cavity, back taper chamber or combination chamber, described combination chamber is by back taper knot Structure and cylindrical cavity combine.
9. the displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating according to claim 2, it is characterized in that: Described canister(3)Front-end surface and secondary condenser(10)Afterbody leave gap.
10. the displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating according to claim 1, its feature It is:Described canister(3)Interior heat absorption carrier(5)It is made up of multistage, Turbogrid plates is provided between adjacent two sections(4), Described Turbogrid plates(4)On be provided with some circular holes.
CN201610803966.8A 2016-09-06 2016-09-06 A kind of displacement air heat dump of the more pocket surfaces of solar energy thermal-power-generating Expired - Fee Related CN106196655B (en)

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CN109855314A (en) * 2018-11-26 2019-06-07 福建工程学院 A kind of light guide structure solar heat absorber
CN109883064B (en) * 2019-02-01 2020-08-04 南京航空航天大学 Solar heat collector
CN109812997B (en) * 2019-03-21 2023-11-10 湖南科技大学 Flow passage and cavity wall integrated solar cavity heat absorber with heat storage function
CN109813169B (en) * 2019-03-25 2023-10-24 湖南科技大学 Elastic tube bundle vibration enhanced heat exchange type solar cavity heat absorber
CN113154708A (en) * 2021-04-15 2021-07-23 东南大学 Packed bed heat collection and storage device with cavity absorber
CN114543058B (en) * 2022-02-25 2023-07-21 中国科学院电工研究所 High-temperature steam generator based on solar energy
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CN103075816A (en) * 2013-01-11 2013-05-01 林峰 High-temperature heat absorber based on disc type solar power system
CN103344048A (en) * 2013-07-18 2013-10-09 北京航空航天大学 Narrowing tube bundle structural-cavity solar receiver
CN206073482U (en) * 2016-09-06 2017-04-05 湖南科技大学 A kind of displacement air heat extractor of solar energy thermal-power-generating with many pocket surfaces

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
DE19952174A1 (en) * 1999-10-29 2001-05-10 Bathen Dieter A solar energy reactor vessel has an immersed receiver body in the reaction material container having additional fossil fuel energized heating.
CN101307956A (en) * 2008-06-24 2008-11-19 中国科学院电工研究所 Solar energy electricity power station bearing type air thermal absorber
CN103075816A (en) * 2013-01-11 2013-05-01 林峰 High-temperature heat absorber based on disc type solar power system
CN103344048A (en) * 2013-07-18 2013-10-09 北京航空航天大学 Narrowing tube bundle structural-cavity solar receiver
CN206073482U (en) * 2016-09-06 2017-04-05 湖南科技大学 A kind of displacement air heat extractor of solar energy thermal-power-generating with many pocket surfaces

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