EP3728964A1 - Solarreceiver zum aufnehmen von sonnenstrahlen und zum aufheizen eines mediums - Google Patents
Solarreceiver zum aufnehmen von sonnenstrahlen und zum aufheizen eines mediumsInfo
- Publication number
- EP3728964A1 EP3728964A1 EP18796392.1A EP18796392A EP3728964A1 EP 3728964 A1 EP3728964 A1 EP 3728964A1 EP 18796392 A EP18796392 A EP 18796392A EP 3728964 A1 EP3728964 A1 EP 3728964A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- solar receiver
- solar
- annular space
- opening
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/02—Devices for producing mechanical power from solar energy using a single state working fluid
- F03G6/04—Devices for producing mechanical power from solar energy using a single state working fluid gaseous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
- F03G6/064—Devices for producing mechanical power from solar energy with solar energy concentrating means having a gas turbine cycle, i.e. compressor and gas turbine combination
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S23/77—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with flat reflective plates
-
- 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
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
- F03G6/063—Tower concentrators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S2080/03—Arrangements for heat transfer optimization
- F24S2080/05—Flow guiding means; Inserts inside conduits
Definitions
- the invention relates to a solar power plant, and more particularly to a solar receiver of such a power plant.
- This solar energy is collected and bundled in a collector field. Then the energy is radiated to one or more solar receivers.
- solar receivers are described in numerous publications. As examples, reference is made to WO 2010/076347 A2 and to EP 2 871 359 B1.
- a decisive component of a solar power plant of the type mentioned is the solar receiver.
- the heating of air takes place, thus air from the environment or coming from a compressor air coming.
- the invention has for its object to provide a solar receiver according to the
- the preamble of claim 1 to be designed such that the efficiency of the solar receiver is increased.
- the subtasks to be solved for this consist in the following:
- the solar receiver according to the invention accordingly comprises the following features - in addition to those according to the preamble of claim 1:
- the wall of the solar receiver comprises an outer wall, a
- Outer wall and partition surround an outer annular space
- Inner wall and partition enclose an inner annulus.
- the outer annular space has at one end of the hollow body
- Solar Receiver makes, an inlet for flowable medium; the two annular spaces are in the region of the opening in conductive connection with each other; the outer annular space has in the opening
- connection to each other, and the inner annular space has an outlet for flowable medium in the end.
- Solar receiver is formed from a hollow body comprising a wall formed of three individual walls, namely formed of outer wall, partition wall and inner wall, wherein an outer and an inner annular space are formed.
- the to be heated cold air flows at one end of the hollow body in the outer annulus, flows through this to the other end; Here, the flow makes a turn, leaving the outer annulus and flowing into the inner annulus and this again flows through to the former end.
- the partition wall between the outer and inner annular space may be thermally insulated, so that the two annular spaces are thermally separated from each other.
- air will be used as the flowable medium. The air is heated on its way through the inner annulus, by means of the
- the inner annular space is advantageously with fluid-carrying and / or
- the fluid-carrying elements may, for example, be walls that run in a spiral through the inner annular space. They guide the incoming stream on a spiral path through the inner annulus from its entrance to its exit. The spiral path runs along the inner circumference of the wall. The existing solar energy in the interior of the solar body is thus transmitted to the medium in an optimal manner.
- the turbulence-generated elements can be protrusions such as pins or sleepers, but also depressions. A swirling of the flowing medium leads to a better heat transfer.
- a particularly interesting embodiment of guide elements is that they profile with sawtooth provides.
- the sawtooth profile thus passes through the inner annulus. Its diameter can be, for example 500 to 600 mm, and its length, for example, 800 to 1000 mm.
- the guide element can also be designed so that a plurality of threads are formed. Each air flow thus lays an equal distance back over the circumference of the inner annulus. The individual air streams therefore have the same temperature at the outlet from the inner annular space.
- the inventive construction of the wall with an inner and an outer annulus follows the principle of the reverse pressure vessel - analogous to a submarine. Therefore, a stiffening of the lateral surface is necessary only outside.
- the outer and the inner annulus are thermally largely decoupled from each other, so that on the outside of the solar receiver due to the lower surface temperature significantly less insulation is necessary. The insulation therefore becomes relatively simple. You do not have to resort to special ceramics as insulation.
- Outer wall, inner wall and partition - to design and arrange so that the flow-through cross-section increases or decreases on the flow paths. This can be influenced on the pressure in the
- Peak temperatures as well as the omission of hotspots do not require special materials.
- the delivery of hot air at the end of the inner annulus should be done with minimal heat loss.
- an internal insulation of the inner annulus can be recommended, analogous to "single-dome" gas turbines and the combustion chamber principle.
- Standard components can be used by increased conductance and better heat transfer of the double flow of the flowable medium in opposite directions.
- the fluid-carrying and / or turbulence-generating elements are of significant advantage for the efficiency of the solar receiver.
- FIG. 1 shows a schematic representation of a solar power plant according to the prior art for generating electrical power.
- FIG. 2 shows a schematic representation of a solar power plant according to the prior art, in which, however, the solar receiver can be designed according to the invention.
- FIGS 3 to 7 show inventive solar receiver.
- FIG. 3 shows a solar receiver in a plan view of a
- cylindrical solar receiver in plan view of one end region.
- FIG. 4 shows the object of FIG. 3 in an axial section according to the section line A-A in FIG. 3.
- FIG. 7 shows the object of FIG. 6 in a plan view of its one end region.
- FIG. 8 shows a schematic representation of an extended solar receiver with secondary concentrators in 3D view.
- the solar power plant shown in Figure 1 illustrates the direct supply of concentrated solar energy to a gas turbine. It recognizes a heliostat field 1. This receives sun rays from the sun 2.
- a tower 3 carries at its upper end at least one solar receiver 4. The radiated into the solar receiver energy heats from a compressor 5 highly compressed air. The heated air is fed to a Topping Combuster 6, and from there a gas turbine 7.
- the other procedures are not essential to the invention.
- the so-called Brayton-Rankine cycle is used.
- a tower 3 carries at least one solar receiver 4. This may be designed according to the invention, as shown in the following figures 3 to 7.
- the solar receiver 4 shown in Figures 3 and 4 is a hollow body of cylindrical shape. He has a wall 8.
- the wall comprises an outer wall 8.1, an inner wall 8.2 and a partition wall 8.3.
- the partition wall is located between outer wall 8.1 and inner wall 8.2.
- Exterior wall 8.1 and partition 8.3 include an outer annulus 8.1.1, while inner wall 8.2 and partition 8.3 include an inner annulus 8.2.1 between them.
- the wall 8 has a longitudinal axis 8.4.
- Solar receiver 4 is arranged such that its opening 9 faces the heliostat, so that an optimum of rays passes into its interior. Solar receiver 4 does not have to be strictly cylindrical. An extension to the opening 9 out is conceivable, or vice versa a rejuvenation. Also, the walls delimiting the interior - seen in an axial section according to Figure 4 - not be rectilinear. A bell-shaped or funnel-shaped
- the hollow body is open at its one end face. See opening 9. At its other end, channels 10 are visible. These are in a conducting connection with the inner annular space 8.2.1.
- the partial flows of the air emerging here are collected in an outlet 11.
- an inlet 12 can be seen at a distance. This is located in an end region which lies opposite the opening 9.
- Inlet 12 is tangentially attached to the wall 8 - see Figure 3.
- Inlet 12 leads to the hollow body process air to, for example, on the environment or from a compressor, and shown in Figure 1. The air is fed to the outer annulus 8.1.1.
- the flow path of the air is as follows:
- the air After the air enters the outer annular space 8.1.1, the air continues to flow in the direction of the longitudinal axis 8.4 of the hollow body up to that end of the
- the outer annular space 8.1.1 flows through the initially relatively cold medium which has entered the tangential inlet 12. Although the medium is heated on its way from the inlet 12 to the region of the opening 9, it still remains at a relatively low temperature level. This is important in the case where one uses not only a single solar receiver but a plurality of them which contact each other, e.g. in the style of
- the outer wall 8.1 performs the following functions:
- the elements 13 located in the inner annulus 8.2.1 internals 13. These are elements that serve the air flow and / or the Heilverwirbelung (turbulence generation).
- the elements 13 may be of different shape and arrangement. In the present case, the elements 13 together form a sawtooth profi. These are strands of any material, such as metal, which have a triangular cross-section. In this case, the apex of the triangle abuts against the dividing wall 8.3, and one side of each triangle abuts a surface of the inner dividing wall. This is also a reverse arrangement conceivable in which the tip of each triangle rests against the inner wall.
- a particularly interesting embodiment is, in the illustrated triangular embodiment of the elements 13 to let each strand run spirally, thus starting from the region of the opening 9 of the
- the elements 13 can also be designed quite differently. Thus, it is conceivable to provide, instead of a triangular cross-section, louvers which protrude into the inner annular space 8.2.1. Also nubs or pins can be provided. In any case, of course, it must be ensured that the inner annular space 8.2.1 can be completely flowed through by the air, thus from the region of the opening 9 of the hollow body to the end region which lies opposite the opening 9.
- the partition 8.3 will generally be insulated against heat transfer.
- Figures 5 to 7 give an impression of the shape and appearance of the elements 13. See in Figures 5 and 6, a hollow cylinder 13.1.
- the hollow cylinder 13.1 is assembled from a mesh of many elements 13.
- FIG. 5 shows, for example, the cylindrical outer wall 8.1 in phantom lines.
- the partition 8.3 can be inserted, and in turn the hollow cylinder 13.1.
- the inner wall has to be inserted 8.2, which is not shown here.
- Figure 8 is a particularly interesting
- Configuration Here is a cluster of solar receivers 4 is shown. These are arranged concentrically to one another.
- Each solar receiver is preceded by a secondary concentrator 14.
- the same number of secondary concentrators 14 is provided as the number of solar receivers.
- Each secondary concentrator is constructed as follows: it has the shape of a funnel that widens, starting from the top end downwards. Its upper, tapered end is passed through the opening 9 of each solar receiver 4 and can more or less far into the interior of the
- the opening 9 is sized and shaped to be defined by a collar 4.1 which is annular and whose outer peripheral edge adjoins the outer wall 8.1 of the solar receiver 4, optionally sealingly, while the inner circumference also sealingly engages the respective secondary wall. Concentrator connects.
- Each secondary concentrator has a hexagonal cross section in the present case. This means that the outer surfaces of adjacent secondary concentrators fit snugly against each other (honeycomb shape).
- the secondary concentrators are formed of bodies that consist of highly reflective material inside.
- the inner surfaces are thus mirror surfaces.
- the outer surfaces are expediently cooled.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017223756.2A DE102017223756A1 (de) | 2017-12-22 | 2017-12-22 | Solarreceiver zum Aufnehmen von Sonnenstrahlen und zum Aufheizen eines Mediums |
PCT/EP2018/079237 WO2019120704A1 (de) | 2017-12-22 | 2018-10-25 | Solarreceiver zum aufnehmen von sonnenstrahlen und zum aufheizen eines mediums |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3728964A1 true EP3728964A1 (de) | 2020-10-28 |
Family
ID=64083071
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18796392.1A Pending EP3728964A1 (de) | 2017-12-22 | 2018-10-25 | Solarreceiver zum aufnehmen von sonnenstrahlen und zum aufheizen eines mediums |
Country Status (5)
Country | Link |
---|---|
US (1) | US11415115B2 (de) |
EP (1) | EP3728964A1 (de) |
AU (1) | AU2018389289B2 (de) |
DE (1) | DE102017223756A1 (de) |
WO (1) | WO2019120704A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111059007B (zh) * | 2019-11-16 | 2021-03-23 | 台州础能环境科技有限公司 | 一种二次反射型聚光太阳能热利用系统 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3042557C2 (de) | 1980-11-12 | 1982-10-21 | Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5300 Bonn | Wärmetauscher, insbesondere für Sonnenkraftwerke |
US5421322A (en) * | 1992-01-23 | 1995-06-06 | Yeda Research And Development Company Limited | Central solar receiver |
DE19710986C2 (de) * | 1997-03-17 | 2001-02-22 | Deutsch Zentr Luft & Raumfahrt | Volumetrischer Strahlungsempfänger und Verfahren zur Wärmegewinnung aus konzentrierter Strahlung |
DE19713598C2 (de) * | 1997-04-02 | 2000-05-25 | Deutsch Zentr Luft & Raumfahrt | Dämmsystem |
DE10007648C1 (de) * | 2000-02-19 | 2001-09-06 | Deutsch Zentr Luft & Raumfahrt | Hochtemperatur-Solarabsorber |
WO2001096791A1 (en) | 2000-06-13 | 2001-12-20 | Rotem Industries Ltd. | High temperature solar radiation heat converter |
JP2002195661A (ja) * | 2000-12-26 | 2002-07-10 | Yeda Res & Dev Co Ltd | 中央ソーラーレシーバー |
DE102004003191A1 (de) | 2004-01-22 | 2005-08-11 | Robert Bosch Gmbh | Elektrohandwerkzeug mit Speichermöglichkeit |
DE102004031917B4 (de) * | 2004-06-22 | 2021-07-29 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Solarstrahlungsempfänger und Verfahren zur Kühlung eines Eintrittsfensters eines Solarstrahlungsempfängers |
US7263992B2 (en) * | 2005-02-10 | 2007-09-04 | Yaoming Zhang | Volumetric solar receiver |
DE102006056070B4 (de) * | 2006-11-20 | 2018-06-21 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Spiegelvorrichtung und Verfahren zur Herstellung einer Spiegelvorrichtung |
EP2382884A1 (de) | 2008-12-31 | 2011-11-02 | Plasticos Alco, S.L. | Maschine zum positionieren von knopflöchern |
US8353286B2 (en) * | 2009-06-23 | 2013-01-15 | Yangsong Li | Solar water heater and method |
US9726155B2 (en) * | 2010-09-16 | 2017-08-08 | Wilson Solarpower Corporation | Concentrated solar power generation using solar receivers |
GB2486205A (en) * | 2010-12-06 | 2012-06-13 | Alstom Technology Ltd | Solar receiver comprising a flow channel presenting a uniform cross sectional area |
US20130220312A1 (en) * | 2012-01-05 | 2013-08-29 | Norwich Technologies, Inc. | Cavity Receivers for Parabolic Solar Troughs |
US9194377B2 (en) | 2013-11-08 | 2015-11-24 | Alstom Technology Ltd | Auxiliary steam supply system in solar power plants |
-
2017
- 2017-12-22 DE DE102017223756.2A patent/DE102017223756A1/de active Pending
-
2018
- 2018-10-25 EP EP18796392.1A patent/EP3728964A1/de active Pending
- 2018-10-25 US US16/956,796 patent/US11415115B2/en active Active
- 2018-10-25 AU AU2018389289A patent/AU2018389289B2/en active Active
- 2018-10-25 WO PCT/EP2018/079237 patent/WO2019120704A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
WO2019120704A1 (de) | 2019-06-27 |
AU2018389289A1 (en) | 2020-08-06 |
US20200392947A1 (en) | 2020-12-17 |
DE102017223756A1 (de) | 2019-06-27 |
AU2018389289B2 (en) | 2023-02-02 |
US11415115B2 (en) | 2022-08-16 |
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