CN102141301B - Pipe-cavity integrated disc solar heat receiver - Google Patents
Pipe-cavity integrated disc solar heat receiver Download PDFInfo
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- CN102141301B CN102141301B CN201110090602A CN201110090602A CN102141301B CN 102141301 B CN102141301 B CN 102141301B CN 201110090602 A CN201110090602 A CN 201110090602A CN 201110090602 A CN201110090602 A CN 201110090602A CN 102141301 B CN102141301 B CN 102141301B
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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
- 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
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Abstract
The invention relates to a pipe-cavity integrated disc solar heat receiver. An integrated structure of a heat absorption cavity and a heat exchanging pipeline is adopted, the cylindrical cavity is provided with two rows of pores to form a circulating pipeline of the gas; the heat exchanging gas flows in an air passage at a high speed and takes away the heat; two groups of the air passages are connected with two gas distribution/gas collection covers via a vent pipe respectively, and the gas distribution/gas collection covers play a role in distributing the gas and collecting the gas alternately during the continuous operation of a system. The inlet of the heat absorption cavity is provided with an annular diffuse reflector, and the bottom of the heat absorption cavity is provided with a diffuse reflecting cone to reduce the radiation heat loss of the heat absorption cavity. The invention solves the thermal fatigue problem generally existent in the conventional direct receiver compared with the past direct solar heat receiver. The receiver has a more compact structure and a longer service life; meanwhile the system has the advantages of small air resistance, good air-tightness, high heat exchanging efficiency and the like, so the overall operation efficiency and the stability of the disc system are facilitated.
Description
Technical field
The present invention relates to the solar heat receiver, relate in particular to the integrated disc type solar energy hot receiver of a kind of tube chamber.
Background technology
Along with energy crisis and problem of environmental pollution are serious day by day, people press for the alternative energy source of seeking cleaning, and solar energy distributes extensively on earth, and the solar energy thermal-power-generating technology is considered to the clean energy technology of potentialization.Dish formula-Stirling solar heat generating is the highest a kind of mode of photoelectric transformation efficiency in the solar energy thermal-power-generating technology; It gathers solar radiation in the hot receiver through paraboloid of revolution dish concentrator, and receiver is realized the conversion of solar energy to electrical by the Stirling thermo-motor after with energy absorption.The power of general solar energy Stirling engine is all less relatively, is suitable for the distributed energy utilization, also possesses and unites the potentiality of generating electricity by way of merging two or more grid systems on a large scale.In addition, they can also be designed to the heat of mixing origin system of fuel and solar concentrator, when having sunlight, can not replace sunshine to continue generating with fossil fuel or biomass fuel.
The disc type solar energy heat generating system comprises critical pieces such as concentrator, receiver, hot machine, support, tracking control system.During system works; Concentrator on hot receiver and be converted into heat energy, absorbs the heat energy that sunshine is transformed with the solar radiation reflect focalization when working media of hot machine is flowed through receiver, medium temperature is raise; Can promote hot machine running, drive generator for electricity generation.
Recipient is the core component of photo-thermal conversion, and the receiver of disc type solar energy heat generating system has two types: directly reception type and indirect reception type.Receiver refers generally to the heat pipe-type receiver indirectly, adopts liquid alkali metal to transmit the high density hot-fluid as middle heat catalysis, still is in the experimental study stage at present, has many problems to wait to solve; And existing dish formula-Stirling heat generating system generally adopts is direct recipient; Because modern efficient Stirling starts general circulating pressure all very high (about 20MPa); The flow velocity of working medium in heat exchanger tube is also very fast, so can realize very high reception heat flow density (about 75W/cm
2).Directly receiver architecture is simple relatively; But because there is very significantly unstability in solar radiation; Add the optically focused precision problem of condenser itself; Often cause directly receiving heat exchanger tube and have serious temperature uneven phenomenon, and then caused such as a series of problems such as heat fatigue, oxidation, service lifes.
It is even that the hot receiver of a function admirable should have heat flux distribution, and efficiency of transmission is high, characteristics such as long service life.The quality of hot receiver performance is one of key factor that can the decision whole system good operation.Traditional direct receiver often adopts heating tube crooked formation heat-absorbent surface or cavity, is easy to occur local damage or gas leakage, causes system high to material requirements, and cost raises greatly.Also attempt having developed the direct receiver of a small amount of other types both at home and abroad; Improved the reliability of receiver; But compare its vapour lock of traditional tubular type direct heater and become big; Air-tightness also be difficult to guarantee, the operational efficiency of Stirling-electric hybrid is had very big influence, therefore designs a kind of heat flux distribution relatively evenly and vapour lock is less, can ensure that bubble-tight hot receiver has crucial meaning for the disc type solar energy heat generating system simultaneously.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, provide a kind of tube chamber integrated disc type solar energy hot receiver.
The integrated disc type solar energy hot receiver of tube chamber comprises interior breather pipe, first distribution/gas collection lid, outer air vent, the second distribution gas collection lid, aluminum alloy casing, connection fixed head, high-temperature-resistant thermal-insulation layer, annular diffuse reflector, high temperature resistant quartz glass, cylindrical cavity, screw, intercommunicating pore, interior circulation road, outer shroud runner, heat-absorbing chamber and diffuse reflection cone; The annular diffuse reflector links closely with the cylindrical cavity top and links to each other; The bottom of cylindrical cavity is provided with a diffuse reflection cone, and the diffuse reflection cone is fixed on four connection fixed heads through screw, and four connection fixed heads are along the circumferential cylindrical cavity inwall that evenly is welded in; Annular diffuse reflector, cylindrical cavity and diffuse reflection cone all are covered with the high-temperature-resistant thermal-insulation layer outward; The high-temperature-resistant thermal-insulation layer outward again the metallized aluminum alloy shell fix, circulation road and outer shroud runner in being provided with in the cylindrical cavity, interior circulation road and outer shroud runner are arranged some groups respectively vertically; Be provided with intercommunicating pore in interior circulation road and outer shroud runner bottom; Intercommunicating pore upper end is through adding cartridge screw with sealing ring seals, and interior circulation road links to each other with first distribution/gas collection lid through the interior breather pipe of cylindrical cavity bottom, and the outer air vent of outer shroud runner bottom cylindrical cavity covers with second distribution/gas collection and link to each other; Outer air vent links to each other with second distribution/gas collection lid; Interior breather pipe links to each other with first distribution/gas collection lid, and first distribution/gas collection lid links to each other with the Stirling-electric hybrid expansion chamber, and second distribution/gas collection lid links to each other with the Stirling-electric hybrid regenerator.
The width of cylindrical cavity is 13-40mm, and distance is 3-8mm to interior circulation road axis apart from the cylindrical cavity bottom surface, and the distance between outer shroud runner and the interior circulation road axis is 4-15mm;
Described cylindrical cavity, connection fixed head and screw all adopt high-temperature alloy material 1Cr18Ni9Ti; Annular diffuse reflector and diffuse reflection cone all adopt ceramic material; Its side near heat-absorbing chamber is high diffuse reflectance surface; High temperature resistant quartz glass adopts high light line penetrance material, and the cylindrical cavity internal face applies high temperature resistant radiation absorption coating.
The main effect of described diffuse reflection cone is that the focused ray that incides cavity central authorities is delivered to cylindrical cavity through irreflexive mode, and the main effect of annular diffuse reflector is the radiation loss that reduces cavity.
High temperature resistant quartz glass mainly contains two effects: (1) focused ray import; (2) heat convection of restriction cavity and external environment reduces thermal loss.
The present invention compared with prior art has following beneficial effect:
(1) be employed in the circulation duct that the method for holing on the heat absorption cavity constitutes Stirling working medium, realize the integrated of heat absorption cavity and working medium circulation duct, structure is very compact; Two distribution/gas collections cover the breather pipe excuse and evenly arrange, can realize even distribution, circumferential more uniform temperature when making cylindrical cavity work can solve the heat fatigue problem of receiver in the past effectively, and lifetime of system is longer.
(2) working medium cross section of fluid channel area equates, the gas communication vapour lock is little, and whole unhelpful volume is little, and the pressure loss when reducing the gas heating has effectively strengthened the internal efficiency of Stirling-electric hybrid.The layout that interior circulation road adds the outer shroud runner can effectively increase the heat exchange area of gas, and bottom surface, interior circulation road is apart from cylinder cavity inner wall face 3mm only, and thermal resistance is very little, can realize high efficient heat exchanging, makes gas be heated to higher temperature.
(3) former and later two diffuse reflectors of cavity the radiation heat loss that can reduce cavity effectively is set, totally enclosed heat absorption cavity can reduce the convection heat losses effectively, the integral solar absorptivity of system is higher.
Description of drawings
Fig. 1 is the structural representation of the integrated disc type solar energy hot receiver of tube chamber;
Fig. 2 is the left view of the integrated disc type solar energy hot receiver of tube chamber;
Fig. 3 is that enlarged drawing (3:1) is looked on the right side of first distribution among Fig. 1/gas collection lid and second distribution/gas collection lid;
Among the figure: breather pipe 1, first distribution/gas collection lid 2, outer air vent 3, second distribution gas collection lid 4, aluminum alloy casing 5, connection fixed head 6, high-temperature-resistant thermal-insulation layer 7, annular diffuse reflector 8, high temperature resistant quartz glass 9, cylindrical cavity 10, screw 11, intercommunicating pore 12, interior circulation road 13, outer shroud runner 14, heat-absorbing chamber 15, diffuse reflection cone 16.
The specific embodiment
As shown in Figure 1, the integrated disc type solar energy hot receiver of tube chamber comprises interior breather pipe 1, first distribution/gas collection lid 2, outer air vent 3, second distribution gas collection lid 4, aluminum alloy casing 5, connects fixed head 6, high-temperature-resistant thermal-insulation layer 7, annular diffuse reflector 8, high temperature resistant quartz glass 9, cylindrical cavity 10, screw 11, intercommunicating pore 12, interior circulation road 13, outer shroud runner 14, heat-absorbing chamber 15 and diffuse reflection cone 16; Annular diffuse reflector 8 links closely with cylindrical cavity 10 tops and links to each other; The bottom of cylindrical cavity 10 is provided with a diffuse reflection cone 16, and diffuse reflection cone 16 is fixed on four connection fixed heads 6 through screw, and four connection fixed heads 6 are along circumferential cylindrical cavity 10 inwalls that evenly are welded in; Annular diffuse reflector 8, cylindrical cavity 10 and the diffuse reflection cone 16 outer high-temperature-resistant thermal-insulation layers 7 that all are covered with; High-temperature-resistant thermal-insulation layer 7 outer metallized aluminum alloy shell 5 are again fixed, circulation road 13 and outer shroud runner 14 in being provided with in the cylindrical cavity 10, and interior circulation road 13 is arranged some groups respectively vertically with outer shroud runner 14; In interior circulation road 13 with outer shroud runner 14 bottoms be provided with intercommunicating pore 12; Intercommunicating pore 12 upper ends are through adding cartridge screw 11 and sealing ring sealing, and interior circulation road 13 links to each other with first distribution/gas collection lid 2 through the interior breather pipe 1 of cylindrical cavity 10 bottoms, and outer shroud runner 14 links to each other with second distribution/gas collection lid 4 through the outer air vent 3 of cylindrical cavity 10 bottoms; Outer air vent 3 is connected with second distribution/gas collection lid 4; Interior breather pipe 1 and first distribution/gas collection lid 2 links to each other, and first distribution/gas collection lid 2 links to each other with the Stirling-electric hybrid expansion chamber, and second distribution/gas collection covers 4 and links to each other with the Stirling-electric hybrid regenerator.
The width of described cylindrical cavity 10 is 13-40mm, and distance is 3-8mm to interior circulation road 13 axis apart from cylindrical cavity 10 bottom surfaces, and the distance between outer shroud runner 14 and interior circulation road 13 axis is 4-15mm;
Described cylindrical cavity 10, connect fixed head 6 and screw 11 all adopts high-temperature alloy material 1Cr18Ni9Ti; Annular diffuse reflector 8 all adopts ceramic material with diffuse reflection cone 16; High temperature resistant quartz glass 9 adopts high light line penetrance material, and cylindrical cavity 10 internal faces apply high temperature resistant radiation absorption coating.
The main effect of diffuse reflection cone 16 is that the focused ray that incides cavity central authorities is delivered to cylindrical cavity 10 through irreflexive mode, and the main effect of annular diffuse reflector 8 is the radiation losses that reduce cavity.
High temperature resistant quartz glass 9 mainly contains two effects: 1 focused ray import; The heat convection of 2 restriction cavitys and external environment reduces thermal loss.
The course of work of the present invention is following:
Sunray is focused on by dish rotation parabolic minute surface, and focused ray passes high temperature resistant quartz glass and gets into heat-absorbing chamber, and about 25% emittance incides on the diffuse reflection cone and by its diffuse reflection.Because the radiation and the convection losses of cavity are all very little, the energy overwhelming majority of focused ray is directly absorbed the diffuse reflection of perhaps passing through diffuse reflector by cylindrical cavity and is absorbed by secondary.The cylindrical cavity internal face absorb focused radiation can after be translated into heat energy, circulation road and outer shroud runner wall in heat energy is passed to through heat conducting mode, the gas flow at high speed is also taken away its heat.When Stirling-electric hybrid gas when regenerator gets into expansion chamber; First distribution/gas collection is built the gas collection effect, and second distribution/gas collection is built the distribution effect, and gas evenly gets into outer air vent from second distribution/gas collection lid; Flow through successively subsequently outer shroud runner, intercommunicating pore and interior circulation road; The absorbing cavity body heat content raises gas temperature simultaneously, and high temperature and high pressure gas gets into first distribution/gas collection lid through outer air vent again, gets into the acting of Stirling engine expansion chamber at last.When Stirling-electric hybrid gas when expansion chamber flows back to regenerator, first distribution/gas collection is built the distribution effect, second distribution/gas collection is built the gas collection effect, gas flow process and aforementioned opposite.When total system moved continuously, gas flowed in runner repeatedly, can realize focusing on the efficient absorption and the utilization of solar radiant energy.
Claims (2)
1. the integrated disc type solar energy hot receiver of tube chamber is characterized in that comprising interior breather pipe (1), first distribution/gas collection lid (2), outer air vent (3), second distribution/gas collection lid (4), aluminum alloy casing (5), connects fixed head (6), high-temperature-resistant thermal-insulation layer (7), annular diffuse reflector (8), high temperature resistant quartz glass (9), cylindrical cavity (10), screw (11), intercommunicating pore (12), interior circulation road (13), outer shroud runner (14), heat-absorbing chamber (15) and diffuse reflection cone (16); Annular diffuse reflector (8) links closely with cylindrical cavity (10) top and links to each other; The bottom of cylindrical cavity (10) is provided with a diffuse reflection cone (16); Diffuse reflection cone (16) is fixed on four connection fixed heads (6) through screw; Four connection fixed heads (6) all are covered with high-temperature-resistant thermal-insulation layer (7) along circumferential cylindrical cavity (10) inwall that evenly is welded in outside annular diffuse reflector (8), cylindrical cavity (10) and the diffuse reflection cone (16), the outer metallized aluminum alloy shell (5) again of high-temperature-resistant thermal-insulation layer (7) is fixed; Circulation road (13) and outer shroud runner (14) in being provided with in the cylindrical cavity (10); Interior circulation road (13) and outer shroud runner (14) are arranged some groups respectively vertically, are provided with intercommunicating pore (12) in interior circulation road (13) and outer shroud runner (14) bottom, and intercommunicating pore (12) upper end seals through adding cartridge screw (11) and sealing ring; Interior circulation road (13) links to each other with first distribution/gas collection lid (2) through the interior breather pipe (1) of cylindrical cavity (10) bottom; Outer shroud runner (14) links to each other with second distribution/gas collection lid (4) through the outer air vent (3) of cylindrical cavity (10) bottom, and outer air vent (3) links to each other with second distribution/gas collection lid (4), and interior breather pipe (1) links to each other with first distribution/gas collection lid (2); First distribution/gas collection lid (2) is connected with the Stirling-electric hybrid expansion chamber, and second distribution/gas collection lid (4) links to each other with the Stirling-electric hybrid regenerator.
2. the integrated disc type solar energy hot receiver of a kind of tube chamber according to claim 1; It is characterized in that described cylindrical cavity (10), connection fixed head (6) and screw (11) all adopt high-temperature alloy material 1Cr18Ni9Ti; Annular diffuse reflector (8) and diffuse reflection cone (16) all adopt ceramic material; High temperature resistant quartz glass (9) adopts high light line penetrance material, and cylindrical cavity (10) internal face applies high temperature resistant radiation absorption coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110090602A CN102141301B (en) | 2011-04-12 | 2011-04-12 | Pipe-cavity integrated disc solar heat receiver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110090602A CN102141301B (en) | 2011-04-12 | 2011-04-12 | Pipe-cavity integrated disc solar heat receiver |
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| Publication Number | Publication Date |
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| CN102141301A CN102141301A (en) | 2011-08-03 |
| CN102141301B true CN102141301B (en) | 2012-10-03 |
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| CN201110090602A Expired - Fee Related CN102141301B (en) | 2011-04-12 | 2011-04-12 | Pipe-cavity integrated disc solar heat receiver |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628410A (en) * | 2011-11-17 | 2012-08-08 | 兰州理工大学 | Short-time and high-temperature heat storage device of multi-cylinder disc type Stirling engine and packaging process |
| CN103195609B (en) * | 2013-03-26 | 2015-10-28 | 大连宏海新能源发展有限公司 | Improve the device of solar energy Stirling engine heating head efficiency |
| CN108375212B (en) * | 2016-10-25 | 2021-03-02 | 玉环未涞流体科技有限公司 | Heat collecting tube for heat collection of disc type solar reflector |
| CN107062634A (en) * | 2017-03-23 | 2017-08-18 | 北京顺风光热科技有限公司 | Dish-style Stirling photo-thermal power generation heat collector, system and the method for improving thermal absorptivity |
| CN110500794B (en) * | 2019-08-26 | 2024-03-22 | 湖南科技大学 | Solar energy/fuel gas complementary heat supply/heat storage integrated solar energy cavity receiver |
| CN115751736B (en) * | 2023-01-09 | 2023-04-25 | 南通源动太阳能科技有限公司 | Dual-channel disc type solar system and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4068474A (en) * | 1976-08-30 | 1978-01-17 | Boris Dimitroff | Apparatus and process for steam generation by solar energy |
| CN101655286A (en) * | 2008-08-20 | 2010-02-24 | 刘玉山 | Cavity-type solar collector |
| CN101672536A (en) * | 2009-10-20 | 2010-03-17 | 益科博能源科技（上海）有限公司 | Solar collector |
| CN201973900U (en) * | 2011-04-12 | 2011-09-14 | 浙江大学 | Pipe-chamber-integrated disc type solar heat receiver |
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