EP3420285A1 - Receiver für solarenergiegewinnungsanlagen - Google Patents
Receiver für solarenergiegewinnungsanlagenInfo
- Publication number
- EP3420285A1 EP3420285A1 EP17703717.3A EP17703717A EP3420285A1 EP 3420285 A1 EP3420285 A1 EP 3420285A1 EP 17703717 A EP17703717 A EP 17703717A EP 3420285 A1 EP3420285 A1 EP 3420285A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- absorber
- modules
- return air
- receiver according
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
- F24S40/50—Preventing overheating or overpressure
- F24S40/55—Arrangements for cooling, e.g. by using external heat dissipating means or internal cooling circuits
-
- 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
-
- 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
Definitions
- the present invention relates to a receiver for solar energy generation systems according to the preamble of claim 1.
- a solar receiver which has a plurality of absorber modules.
- An absorber module contains an absorber body facing the incident solar radiation which is porous. Through the absorber body air is sucked in, which heats up when passing through the absorber body.
- the receiver is suitable for large power generation plants, in which numerous heliostats are distributed in a field that reflect solar radiation on the receiver. Thus, a high radiation concentration is produced at the receiver, which results in temperatures in the range of up to 1100 ° C. at the absorber module.
- a support structure is provided which carries numerous absorber modules. Each absorber module consists of a ceramic absorber head and an absorber body held by the absorber head. At the absorber head includes a hot air duct structure, for example, a hot air duct. The generated hot air is used for the operation of work machines, such as turbines for power generators, and cools down, but still contains residual heat.
- the air is returned to the solar receiver and passed through a support structure and along the walls of the hot air ducts to cool them.
- This return air flows between the absorber modules to emerge forward at the front. It is then together with located on the front air in the Absorber body sucked.
- a relatively large volume flow of return air is necessary. This leads to a relatively high velocity of the return air, so that it exits at a relatively high exit velocity between the absorber modules. This can lead to a relatively large proportion of the return air emerging at the front not being sucked in by the absorber modules and thus not being recirculated. This leads to an energy loss and thus to a reduction in the efficiency of the overall system.
- the receiver structure has a high pressure loss with respect to the volume flow of the return air, so that a high blower power and thus a high electrical energy requirement is required in the volume flow previously required.
- the return air also flows through a very hot part of the absorber module, so that the return air is additionally heated by this, whereby non-sucked return air leads to a particularly high energy loss.
- the concept in which the return air flows out through gaps between the absorber modules front causes problems because on the one hand the columns for the return air should not be designed to narrow to avoid excessive acceleration of the return air, on the other hand with too wide columns on the Radiation incident on the front side of the receiver also reaches the gaps and thus undesired heating of the support structure can occur, which in turn has a greater need for return air for cooling.
- the radiation component which strikes the radiation can also be used less effectively than radiation which strikes the absorber body directly.
- the receiver according to the invention is defined by the patent claim 1.
- the receiver according to the invention for solar energy recovery systems has a support structure which carries absorber modules and a plurality of air pipes.
- the absorber modules each contain a front absorber body and a hot air duct, wherein one of the air pipes connects to each hot air duct and the absorption modules are respectively flowed through by process air.
- the process air can be supplied as a heat transfer medium to a consumer, wherein at least the air pipes with recirculated return air can be cooled, which exits at the front to be sucked into the absorber modules.
- the invention is characterized in that selected air ducts are each connected to the front side with an outlet module, wherein the outlet modules are arranged adjacent to absorber modules and the return air exits the outlet modules on the front side.
- the flow control of the return air is changed and the return air can advantageously exit the front through Ausströmmodule.
- the occurring during the outflow of the return air through the gaps of the prior art receiver high speeds can be avoided.
- the distances between adjacent absorber modules can be reduced to a minimum, for example to a distance adapted to the thermal expansion of the absorber modules.
- the invention has the particular advantage that the escape modules are connected to selected air tubes of the multiple air tubes of the receiver.
- the Ausrömmodule be attached to the support structure instead of an absorber module. This allows the present invention in a simple manner by minor redesigns be implemented by known receivers. Retrofitting existing receivers is also possible in a simple way.
- the receivers according to the invention are particularly suitable for a modular design.
- the support structure of individual identically constructed modules which consist of a plurality of air pipes and absorber modules and Ausströmmodule can be arbitrarily arranged on the support structure, without requiring a change in the modules of the support structure.
- an inventive receiver is particularly inexpensive to produce.
- the support structure forms a cavity, which at least traverse the fron carpet connected to an absorber module air pipes so that they emerge at the back of the cavity, wherein the return air is passed through the cavity.
- the air pipes which are exposed in operation due to the heated by the absorber module process air to a high temperature, within the cavity with return air, which is recycled by a supplied with the process air heat consumers, are cooled.
- the air pipes Due to the advantageous cooling of the air pipes they do not necessarily have to consist of a high temperature resistant material.
- the air pipes can be made of steel, which simplifies the design of the receiver according to the invention.
- the emerging at the back of the cavity air pipes open, for example, in a collector in which the heated process air is collected and then supplied to the heat consumer.
- the air pipes each have a cooling jacket fed with return air from the cavity.
- the cooling jacket may for example be formed by an outer tube, wherein the gap formed between the outer tube and the air tube is in fluid communication with the cavity.
- the selected air tubes, to the one Ausströmmodul is connected have a corresponding cooling jacket.
- the selected air tubes may traverse the air space so that they exit at the rear of the cavity.
- the airtight sealing of the air tubes can be provided by a corresponding insert in an air tube.
- an air-tight closure of an air tube by a corresponding configuration of the connected to the air tube Ausströmmoduls done.
- the cooling jackets each extend at least around an end portion of the hot air duct of an absorber module.
- the cooling jackets surround not only air ducts but at least a part of the connected to an air duct hot air duct of an absorber module. As a result, this part of the hot air duct is cooled.
- the Ausrömmodule have an air duct and a module head, wherein the air duct and / or the module head have at least one return air opening.
- the return air can advantageously reach the interior of the Ausströmmoduls and flow out of this on the front of the receiver.
- the return air opening is thus in this embodiment in the circumferential wall of the Ausströmmoduls.
- the return air can also flow through the regular opening of the air duct, for which purpose a more complicated flow guidance is necessary.
- an outflow space is formed between the absorber modules, to which the return air can be fed.
- the outflow space is thus a branched space, which is penetrated by the absorber modules.
- the outflow space can of course also extend between absorber modules and Ausströmmodulen.
- the return air opening is in fluid communication with the outflow space.
- the return air collected in the outflow space can be conducted in a simple manner in Ausströmodule.
- the return air opening can be arranged, for example, in the wall of the outlet modules facing the outflow space, so that the return air can flow directly from the outflow space into the outlet modules.
- cooling jackets each have an outlet which opens into the outflow space formed between the absorber modules. This ensures that the return air is passed directly from the cooling jackets in the outflow space.
- the absorber modules each have an absorber head merging into the respective hot air duct, which carries the absorber body, wherein gaps formed between the absorber heads are hermetically sealed. This can be done, for example, via shut-off plates, for example shut-off plates.
- the gaps formed between absorber heads and the module heads of Ausströmmodule can be hermetically sealed. The airtight sealing of the gaps between the individual modules prevents radiation which penetrates into a gap from reaching the support structure and thus can not be heated by the radiation in an undue manner.
- the hermetic sealing of the column prevents the return air, which is passed, for example, in a space arranged behind the gap, for example, the outflow, from the columns to the front surface of the receiver, but exclusively through the Ausströmmodule.
- the shut-off plate may for example be formed as a perforated plate, which is penetrated by the absorber modules or the Ausströmmodulen and the Ausströmmodulen.
- At least one of the Ausrömmodule has a front-mounted air deflecting device for deflecting the outflowing return air.
- Air guiding device By means of Air guiding device, the outgoing from a Ausströmmodul return air can be deflected in an advantageous manner to adjacent arranged Absorbermodulen.
- the air guiding device can be fastened, for example, to the module head, for example to an outflow body arranged on the module head.
- the spoiler which is exposed directly to the directed to the receiver radiation can be cooled by the outgoing return air.
- the spoiler device may be formed by a plate which is arranged parallel to the front side.
- the air flowing out of the module head of the Ausströmmoduls thus bounces against the plate and is deflected laterally.
- the plate can be made as large as the module head or smaller.
- the plate is cooled by the outflowing air.
- the plate may be at least partially transparent to the concentrated solar radiation, so that the Ausströmmodul is heated.
- the spoiler device can also have outflow holes for providing a predetermined outflow profile of return air.
- the outflow profile for example, provide different speeds of outflowing return air and different flow cross sections for the return air. In this way, it can be controlled how far the return air flows over adjacent absorber modules, before being sucked through the absorber modules.
- the spoiler device may for example have a partially encircling end wall. By means of the peripheral end wall, it can be prevented, for example, at the edges of the receiver, that return air which flows out of the discharge modules passes over the edge of the receiver and thus can not be used.
- the outflow holes can also be arranged in the partially circumferential end wall.
- the discharge holes may have, for example, a nozzle profile.
- the air guiding device can achieve that the flow of the outflowing return air at the front side of the receiver is less sensitive to wind than in the case of the prior art. This will be This is achieved by virtue of the fact that return air flowing out through the outflow modules thus remains closer to the surfaces of the absorber modules at a lower speed. This effect can be enhanced by the provision of the spoiler.
- FIG. 1 is a schematic view of a solar energy recovery system with a receiver according to the invention
- 2a is a schematic view of one of several sub-receivers, from which the receiver is composed
- 3 is a schematic view of one of several receiver modules composing the subreceiver
- Fig. 4 is a schematic longitudinal section through an inventive
- Fig. 5 is a schematic longitudinal section through a plurality of adjacent
- FIG. 6 is a schematic longitudinal section through a second embodiment of a Ausströmmoduls
- a solar energy recovery system 100 is shown schematically. Sunlight is reflected by the heliostat 110 of a heliostat field 120 on the receiver 1 according to the invention.
- Receiver 1 is an open volume metric receiver executed, with air from the area in front of the front la of the receiver 1 is sucked in and forms the process air.
- the process air is heated by the receiver 1 and fed via hot air lines 130 to a consumer.
- the consumer may be, for example, a steam generator 140 with a conventional steam cycle 150 or a heat storage 160.
- the cooled process air is returned to the receiver as return air.
- the receiver 1 is shown schematically in a front view in FIG.
- the receiver 1 is composed of several subreceivers 3.
- the subreceivers 3 together form a rectangular structure which is the radiation receiving structure of the receiver 1.
- the subreceivers 3 have cavities which are interconnected and form a common collector.
- Several subreceivers 3 are connected to a central hot air collector, which opens into the hot air line 130.
- the sunlight reflected by the heliostat 110 on the receiver 1 has a radiation flux density distribution with a rounded profile 4, which is shown schematically in FIG. Outwardly, the radiation flux density distribution decreases, so that outer corner regions 3a of the subreceiver 3 are only slightly irradiated.
- a subreceiver 3 is shown schematically. It consists of several receiver modules 5, which are equal to each other and each cylindrical in shape and form part of a support structure.
- a receiver module 5 is shown schematically in FIG.
- the support structure 7 may for example consist of steel.
- the receiver module 5 has on a front side a plurality of holes 9, are inserted into the absorber modules 11.
- An absorber module 11 consists of, for example, high-temperature resistant ceramic or other material and has the shape of a tube with a cup-shaped absorber head 13.
- outlets 15 for the hot air are located at the back (bottom in Fig. 3) of the receiver module 5 .
- the connection between the outlets 15 and the absorber modules 11 is provided via air pipes, which are not shown in Fig. 3.
- outflow modules 14 are arranged, which are explained in more detail with reference to FIG. 5.
- the structure of a receiver 1 according to the invention is shown schematically in longitudinal section in FIG.
- the receiver 1 has a plurality of absorber modules 11, which are arranged side by side. In each case a plurality of absorber modules 11 are combined to form a subreceiver 3.
- Each absorber module 11 has, as best seen in Figure 5, an absorber head 13 and a recorded in the absorber head 13 front absorber body 17.
- the absorber body 17 may for example consist of a porous high temperature resistant ceramic.
- a front surface 17a of the absorber body 17 forms the radiation-receiving surface. By the absorber body 17 ambient air is sucked in, which heats up when passing through the hot absorber body 17.
- the absorber head 13 is formed kelchförmig and opens into a hot air duct 19.
- the absorber module 11 is inserted with the hot air duct 19 in the support structure 7 and connected to an air tube 21 of the support structure 7.
- the hot air duct 19, together with the air pipe 21, forms a hot air duct structure, via which process air heated in an absorber module 11 is conducted by the absorber module 11 into a collector 26 of the corresponding subreceiver 3.
- the collectors 26 of adjacent subreceivers 3 are connected to a central hot air collector 27, which directs the hot air into the hot air line 130 of the solar energy recovery system 100.
- an outlet module 14 is connected in each case at the front.
- the Ausrömmodule 14 are disposed adjacent to the absorber modules 11, and return air can exit the front side of the Ausströmmodulen.
- the support structure 7 forms a return air guide 35.
- the return air guide 35 is connected via an air nozzle 31 with the air return 170. Cooled process air can be conducted past the air return 170 as return air to an air pipe 21 and cool it. The return air heated thereby can be guided into an outflow space 40 formed between the absorber modules 11 or between the absorber modules 11 and the outflow modules 14. From the outflow space 40, the air enters the Ausströmmodule 14, whereby it can be ejected from the front.
- the support structure 7 has, as best seen in Fig. 3 can be seen, a cavity 25 through which the air tubes 21 pass.
- the cavity 25 forms the return air guide 35 via which the return air can be guided past the air tubes 21.
- cooling jackets 41 are provided which surround the air pipes 21.
- the cooling jackets 41 are formed by the air pipes 21 surrounded outer tubes 42.
- the gap 42a formed between an outer tube 42 and an air tube 21 is fed with return air from the cavity 25.
- the air pipes 21 are cooled in an advantageous manner, so that they can for example consist of steel.
- the selected air tube 21a is surrounded by a cooling jacket 41.
- the cooling jackets 41 have an outlet which opens into the outflow space 40.
- the selected air pipes 21a are hermetically sealed. In the embodiment shown, this is done via a plug 43 shown schematically. This prevents air from the front side 1a being sucked in through the outlet module 14 through the selected air pipes 21a.
- the Ausströmmodul 14 consists of a module head 16 and an air passage 18.
- the module head 16 may have the same cup shape as the absorber heads 13.
- return air openings 20 are provided which open in the outflow space 40 and thus are in direct fluid communication therewith. The returned in the Auströmraum 40 return air can thus flow through the return air openings 20 in the Ausströmmodul 14 and the front side emerge from this.
- the gaps 44 formed between the absorber modules 13 and the absorber modules 13 and the outlet modules 14 are hermetically sealed.
- shut-off plate 45 is provided which closes off the outflow space 40 toward the gaps 44. This prevents radiation penetrating into the gaps 44 from reaching the support structure 7 and heating it in an undesired manner.
- the Ausströmmodul 40 has front of a spoiler 50.
- the air guiding device 50 consists of a plate fastened to the module head 16.
- the return air flows, as indicated by arrows, out of the Ausströmmodul 14 and strikes the plate-shaped spoiler 50. As a result, the return air is deflected laterally toward the adjacent absorber modules 11.
- the plate-shaped spoiler 50 is directly exposed to the solar radiation. By the return air, the spoiler is cooled. Furthermore, the plate-shaped air guiding device 50 is at least partially transparent to the impinging solar radiation, so that at least part of the solar radiation passes into the Ausströmmodul 14 and this is heated.
- FIG. 6 another embodiment of a Ausströmmoduls 14 is shown.
- the Ausströmmodul 14 shown in Fig. 6 has a comparison with the embodiment shown in Fig. 5 differently designed air guiding devices 50.
- the spoiler 50 of Fig. 6 consists of a plate 50 a, which has a circumferential end wall 51. On one side of the end wall 51 outflow holes 52 are formed.
- the module head 16 outflowing Return air is thus diverted from the plate 50a and flows out of the exhaust holes 52 in a predetermined direction.
- the circumferential end wall 51 has no outflow holes.
- the outflow module 14 shown in FIG. 6 can thus be arranged in an edge region such as, for example, the region 3a of FIG.
- the outflow holes 52 being directed in the direction of the center of the receiver. This prevents return air from escaping over the edge of the receiver 3.
- About the discharge holes 52 and the outflow profile of the return air can be influenced.
- a given velocity profile of the return air can be achieved by a special shape of the outflow holes 52, in which, for example, the part of the return air flowing closer to the front face 17a of the adjacent absorber body 17 has a lower velocity than the outflowing at a slightly greater distance from the front face 17a return air.
- the shape of the outflow holes 52, the cross-sectional shape of the flow of the outflowing return air can be specified.
- the outflow holes 52 may, for example, also have a nozzle shape.
- the Ausrömmodule 14 may be distributed differently over the surface of the receiver 3. For example, a larger number of outlet modules 14 per area can be provided in the inner area of the receiver 3, which is hit by a higher solar radiation, than, for example, in the outer corner areas 3a, in which the radiation is lower. Due to the high irradiation in the central region, the hot air generated has a higher temperature, so that a higher cooling capacity is required by the return air. Due to the higher irradiation, a larger amount of return air can also be supplied in this area without the generated hot air being given too low a temperature. In the outer corner areas, however, there is a lower temperature of the hot air generated, so that a lower cooling capacity is necessary.
- the air guiding device 50 By means of the air guiding device 50, it can be achieved that the return air emerging from the outflow module 14 is reduced to a smaller extent by blown from the front of the receiver la, so that the return air can be returned to the system with a higher return air rate.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016203102.3A DE102016203102B4 (de) | 2016-02-26 | 2016-02-26 | Receiver für Solarenergiegewinnungsanlagen |
PCT/EP2017/052283 WO2017144251A1 (de) | 2016-02-26 | 2017-02-02 | Receiver für solarenergiegewinnungsanlagen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3420285A1 true EP3420285A1 (de) | 2019-01-02 |
Family
ID=57984930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17703717.3A Withdrawn EP3420285A1 (de) | 2016-02-26 | 2017-02-02 | Receiver für solarenergiegewinnungsanlagen |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3420285A1 (de) |
BR (1) | BR112018016850A2 (de) |
DE (1) | DE102016203102B4 (de) |
MA (1) | MA43661A (de) |
WO (1) | WO2017144251A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019209241A1 (de) * | 2019-06-26 | 2020-12-31 | Siemens Aktiengesellschaft | Geschlossener solarthermischer Receiver für Luft und andere gasförmige Medien und solarthermische Turmanlage mit einem solchen Receiver |
DE102022209642A1 (de) * | 2022-09-14 | 2024-03-14 | Siemens Energy Global GmbH & Co. KG | Solarthermisches Modul |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4223779C1 (de) * | 1992-07-18 | 1993-12-02 | Steinmueller Gmbh L & C | Solaranlage mit einem Lufterhitzer und Luftrückführung |
DE19744541C2 (de) * | 1997-10-09 | 2001-05-03 | Deutsch Zentr Luft & Raumfahrt | Solarempfänger |
DE10113637C1 (de) * | 2001-03-21 | 2002-11-07 | Deutsch Zentr Luft & Raumfahrt | Solarempfänger |
WO2003021161A1 (en) * | 2001-09-06 | 2003-03-13 | Stobbe Tech Holding A/S | Integrated volumetric receiver unit and process for producing silicon infiltrated bodies |
DE10239700B3 (de) * | 2002-08-29 | 2004-05-27 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Solarempfänger für ein solarthermisches Kraftwerk |
DE102009035141B4 (de) * | 2009-07-29 | 2015-12-31 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Offener volumetrischer Solarstrahlungsempfänger |
DE102010046831B4 (de) * | 2010-09-29 | 2015-04-09 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Receiver für Solarenergiegewinnungsanlagen |
DE102011005817B4 (de) * | 2011-03-18 | 2015-06-11 | Saint-Gobain Industriekeramik Rödental GmbH | Solarabsorbermodul |
DE102011016465B3 (de) * | 2011-04-08 | 2012-08-30 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Verfahren zum Entfernen von Absorberkörpern aus einem solarthermischen Receiver |
-
2016
- 2016-02-26 DE DE102016203102.3A patent/DE102016203102B4/de active Active
-
2017
- 2017-02-02 MA MA043661A patent/MA43661A/fr unknown
- 2017-02-02 EP EP17703717.3A patent/EP3420285A1/de not_active Withdrawn
- 2017-02-02 BR BR112018016850-5A patent/BR112018016850A2/pt not_active Application Discontinuation
- 2017-02-02 WO PCT/EP2017/052283 patent/WO2017144251A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
MA43661A (fr) | 2018-11-28 |
WO2017144251A1 (de) | 2017-08-31 |
BR112018016850A2 (pt) | 2018-12-26 |
DE102016203102B4 (de) | 2018-01-25 |
DE102016203102A1 (de) | 2017-08-31 |
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