EP4367446A1 - Empfängervorrichtung für solarstrahlung mit einem behälter zum aufheizen eines wärmeträgermediums in einem solarthermischen kraftwerk - Google Patents
Empfängervorrichtung für solarstrahlung mit einem behälter zum aufheizen eines wärmeträgermediums in einem solarthermischen kraftwerkInfo
- Publication number
- EP4367446A1 EP4367446A1 EP22741498.4A EP22741498A EP4367446A1 EP 4367446 A1 EP4367446 A1 EP 4367446A1 EP 22741498 A EP22741498 A EP 22741498A EP 4367446 A1 EP4367446 A1 EP 4367446A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- counter
- bearing
- bearing elements
- container
- 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
- 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
- F24S40/80—Accommodating differential expansion of solar collector elements
-
- 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
- F24S80/20—Working fluids specially adapted for solar heat collectors
-
- 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
- F24S2020/23—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants movable or adjustable
Definitions
- Receiver device for solar radiation with a container for heating a heat transfer medium in a solar thermal power plant
- the invention relates to a receiver device for solar radiation with a container for heating a heat transfer medium in a solar thermal power plant.
- Prior art receiver devices for solar radiation are known as solar particle receivers for solar tower power plants.
- Such receiver devices use a rotating, hollow-cylindrical container in which a closed film of ceramic particles with a diameter of typically 1 mm or smaller forms as a heat transfer medium on the inner wall of the rotating cylinder.
- This particle film is heated to over 1000°C using concentrated solar radiation and then removed from the cylinder.
- the energy stored in the particles can be temporarily stored in an insulated container and used for power generation and/or in process applications.
- DE 102014106320 A1 describes a device with a solar radiation receiver which includes a container which includes an outer wall and an interior space surrounded by the outer wall.
- the device comprises a supply device for supplying a heat transfer medium to the interior of the container.
- the container is by means of a rotary drive device
- Heat transfer medium film is guided along an inner wall of the container.
- the device comprises at least one overflow element for forming a rotationally symmetrical inner surface of the heat transfer medium film
- DE 102010063116 A1 discloses a device with a solar radiation receiver which includes a container which includes an outer wall and an interior space surrounded by the outer wall. The interior accommodates a heat transfer medium, with solar radiation and/or heated by solar radiation
- Heat transfer medium can be coupled into the interior via a coupling opening.
- the container rotates about its axis by means of a rotary drive device, with receiving areas for heat transfer medium being arranged or formed on the wall facing the interior.
- At least one driver is assigned to a receiving area, by means of which the heat transfer medium can be entrained against the direction of gravity when the container rotates. Disclosure of Invention
- the object of the invention is to create an inexpensive and maintenance-friendly receiver device for solar radiation with a container for heating a heat transfer medium in a solar thermal power plant.
- the object is solved by the features of the independent claim.
- Favorable configurations and advantages of the invention result from the further claims, the description and the drawing.
- a receiver device for solar radiation with a container for heating a heat transfer medium in a solar thermal power plant.
- Proposed heat transfer medium in a solar thermal power plant with a extending in a longitudinal direction double-walled housing surrounding an interior and having an outer wall and an inner wall surrounded by it, between which a plurality of bearing elements and counter-bearing elements is arranged.
- At least two bearing elements are provided, which rest on opposite sides of the respective counter-bearing element.
- at least two counter-bearing elements are provided, which rest on opposite sides of the respective corresponding bearing element.
- the container of the receiving device can be designed, for example, as a rotating drum in which a closed film of ceramic particles typically having a maximum diameter of 1 mm is formed on the inner wall of the rotating cylinder. This particle film is heated to over 1000°C using concentrated solar radiation and then removed. Temperatures of, for example, 1100° C. and more can occur. The energy stored in the particles can be temporarily stored in an insulated container and used to generate electricity and/or in process heat applications.
- the receiver device has an inlet for supplying the heat transfer medium to the container and an outlet for discharging the heat transfer medium from the container.
- the rotating drum places special demands on the structure and storage of the components.
- High-temperature alloy running surface for the particles at a temperature of at least 900 ° C.
- this metal surface also known as the inliner, experiences large thermal expansions in the axial and radial directions.
- Thermal insulation is usually located between the hot running surface of the inner wall and the outer wall of the container, so that the flow of energy to the outer wall is reduced and the outer wall also generally does not heat up to more than 100°C. This means that there is less thermal expansion on the outer wall.
- bearing elements and the corresponding counter-bearing elements on the inner wall and the outer wall are advantageously arranged alternately in such a way that they act as floating bearings and are arranged so that they can move in relation to one another in the radial and axial direction and block relative movement in the circumferential direction.
- Another part of the bearing elements and the corresponding counter-bearing elements are arranged alternately on the inner wall or the outer wall in such a way that they act as a further floating bearing and are arranged so that they can move relative to one another in the radial direction and in the circumferential direction of the container and block a relative movement in the longitudinal direction of the container.
- the two loose bearings act perpendicular to each other.
- a fixed bearing can be provided, for example, in a peripheral region of the container, for example closer to one end of the container.
- the bearing elements arranged as a further movable bearing and corresponding counter-bearing elements, which form a fixed bearing with the first type of movable bearing are blocked on a circumferential line.
- the bearing of the inner wall relative to the outer wall by means of the bearing elements and counter bearing elements according to the invention represents a comparatively inexpensive way of positioning and bearing the two components.
- the container can thus be manufactured and assembled in a favorable manner.
- the structure of the container also has an advantageous effect with regard to possible maintenance processes, since the container can again be dismantled in a relatively simple manner.
- the receiver device with the container can be advantageous for solar particle centrifugal receiver for solar power plants, solar process heat
- Plants and solar chemical modification of particle-like materials are used.
- Alternative, similar applications, in which a hot inner tube is to be kept in a cold outer jacket, can also be implemented in a cost-effective way.
- the container can advantageously be made of steel. Due to the high temperatures of the heat transfer medium, the inner wall is advantageously made of a high-temperature-resistant stainless steel or another high-temperature alloy such as Inconel.
- the bearing elements can be designed as fins that protrude in the radial direction toward the outer wall and have at least one contact surface facing a corresponding counter-bearing element in the circumferential direction.
- the counter-bearing elements can be designed as fins that protrude in the radial direction toward the inner wall and have at least one contact surface facing the respective corresponding bearing element in the circumferential direction.
- a floating bearing of the inner wall relative to the outer wall can be realized by arranging individual fins of this type on the inner wall as bearing elements over the circumference of the inner wall. These fins can, for example, be drawn over the entire axial length or be individually arranged several times over the axial length.
- These fins serve as a sliding surface in the radial and axial directions.
- Drivers can be arranged alternately in the axial direction on the sliding surfaces, which are fastened to the outer wall as counter-bearing elements. Such an arrangement can also take place alternately in the circumferential direction. However, this is not absolutely necessary.
- Web like a kind of stiffening ring is arranged.
- This ring can also be designed as several individual fins, but this time oriented in the circumferential direction.
- the ring again serves as a sliding surface, this time only in the circumferential direction.
- Abutment elements can be arranged to slide alternately on this ring over the circumference, so that an axial movement of the inner wall against the outer wall is prevented.
- the counter bearing elements are also connected to the outer wall. For a fixed bearing in the longitudinal direction, however, a one-sided attachment of the counter-bearing elements in the direction of gravity can also suffice.
- the construction in the so-called fixed bearing area can be made correspondingly more compact.
- a sliding element in particular made of ceramic, can be arranged between at least one bearing element and the corresponding counter-bearing element.
- the sliding element can be arranged on the bearing element. In this way, additional ceramic plates can be placed on the contact surfaces to protect the material.
- the abrasion of the material due to the movement of the bearing elements and counter-bearing elements due to thermal expansion can thus be significantly reduced.
- the sliding element can also be easily replaced if necessary, for example due to abrasion.
- the sliding element can also act as thermal insulation.
- Ceramic plates for example made of Al 2 O 3 , SiC, ZrO 2 , can be used as the material for the sliding element.
- an insulating element for thermal insulation can be arranged between the sliding element and the contact surface.
- Intermediate layers as thermal insulation between the sliding element and the bearing elements can significantly reduce the heat transfer from the inner wall to the outer wall. This makes it possible to maintain the lower temperatures required on the outer wall. In this way, the thermal loss of the receiver device can also be reduced to a required level in a favorable manner.
- the counter-bearing elements can have a driver that protrudes in the radial direction and has at least one contact surface facing a corresponding bearing element.
- the carrier with its contact surface represents the active element of the counter-bearing element for the interaction of bearing element and counter-bearing element to limit the relative movement of the inner wall against the outer wall.
- a sliding element in particular made of ceramic, can be arranged on the contact surface of the driver, which sliding element faces the corresponding bearing element, in particular the respective sliding element.
- Abrasion of the material due to the movement of the bearing elements and counter-bearing elements can be significantly reduced by thermal expansion.
- the sliding element can also act as thermal insulation.
- At least one of the sliding elements can have a surface which faces the respective corresponding sliding element and is concavely curved in the radial direction.
- the concavely curved surface of the sliding element facilitates assembly of the container through the self-centering of bearing elements and counter-bearing elements in this way.
- movements of the inner wall against the outer wall due to thermal expansion can thus be promoted, which can lead to shrinkage and growth in the diameter of the inner wall.
- the abutment elements can have two limbs, which are arranged in particular at right angles to one another, one of the two limbs having a connecting surface with the outer wall and the other of the two
- the two legs of the counter-bearing element can be connected by a strut, in particular arranged diagonally between the ends of the legs.
- the strut can be used as an additional stiffening of the
- Abutment element are used in order to be able to transmit larger forces between the bearing element and the abutment element in this way.
- the two legs of the counter-bearing element can be designed as U-profiles.
- the design as a U-profile can advantageously be used in order to be able to transmit greater forces between the bearing element and counter-bearing element in this way.
- the counter-bearing elements can be manufactured inexpensively as a result.
- the sliding elements and/or the insulating element can be connected to the respective bearing element or the respective counter-bearing element by means of at least one fastening element, in particular a fastening spring.
- Sliding elements and/or insulating elements can thus be reliably and permanently connected to the bearing element or counter-bearing element by means of a fastening according to a tongue and groove concept. Shearing forces due to the thermal expansion of the inner wall and outer wall relative to one another can also be absorbed in this way.
- a circumferential ring which is arranged radially between the outer wall and the inner wall and has or forms at least one bearing element can be formed along the circumferential line.
- the ring can be arranged on the inner wall.
- the fixed bearing can be implemented in such a way that, for example, a web, such as a type
- Stiffening ring is arranged.
- This ring can also be designed as several individual fins oriented in the circumferential direction.
- the ring serves as a sliding surface in the circumferential direction.
- Abutment elements can be arranged to slide alternately on this ring over the circumference, so that an axial movement of the inner wall against the outer wall is prevented.
- the inner wall can be formed from individual longitudinal segments joined together in the circumferential direction, in particular longitudinal segments arranged in a ring in the circumferential direction and stacked in the longitudinal direction, with the bearing elements being formed in one piece with the longitudinal segments.
- the bearing elements can be formed by bending the longitudinal segments along joining lines of the longitudinal segments to one another.
- Inner wall in individual longitudinal segments large dimensions of the container can be realized cheaply.
- the integration of the bearing elements into the longitudinal segments by folding the longitudinal segments enables cost-effective manufacture of the container.
- a fixed connection of the bearing elements to the inner wall can be ensured in a simple manner.
- the longitudinal segments can be divided into axial segments in the longitudinal direction.
- the further subdivision of the longitudinal segments into axial segments favors the realization of large container dimensions.
- Production of the container can thus be implemented advantageously.
- the longitudinal segments and/or axial segments can have stiffening ribs, in particular diagonal ribs, on a radial outside
- stiffening ribs have stiffening ribs.
- the mechanical stability of the inner wall can be decisively increased by means of the stiffening ribs.
- Large dimensions of the container can thus advantageously be implemented with a moderate increase in weight of the receiver device.
- At least the outer wall can be formed from flat longitudinal segments which are joined at least along joining lines formed in the longitudinal direction.
- a polygonal outer shape of the outer wall can prove to be particularly favorable in order to have flat surfaces on the outside of the container for connecting the counter-bearing elements.
- the counter bearing elements can be installed through a type of removable window.
- windows can also be represented in a cylindrical outer wall.
- the advantage of constructing the outer wall from flat longitudinal segments is that many simple identical parts can be used. Since the bearing is sliding and therefore multi-part, assembly and subsequent maintenance are significantly simplified. Furthermore, the components are subject to significantly less stress, since no permanent deformations will occur as a result of the sliding, in contrast to a design with double springs. Thus, large thermal deformation paths are also possible without problems
- a polygenic outer wall is distributed in such a way that mechanical connections are possible in a simpler way. This also favors a multi-part structure in the case of large containers.
- the receiver device can
- Aperture opening for the entry of solar radiation at one of the ends of the container the container having a longitudinal axis which is oriented parallel or at an acute angle less than or equal to 90° to the direction of gravity.
- the container can be rotated about an axis of rotation in an intended direction of rotation by means of a rotary drive device in such a way that the heat transfer medium can be guided along an inner wall of the container, forming a heat transfer medium film.
- a film of heat transfer medium can form particularly favorably on the inner wall of the rotating container, so that heat transfer from the solar radiation entering through the aperture opening to the heat transfer medium can be achieved as uniformly as possible.
- a homogeneous distribution of the heat transfer medium which can in particular be configured as a particle flow, can advantageously be achieved at the beginning of the running surface of the heat transfer medium on the inner wall of the container.
- FIG. 1 shows a receiver device for solar radiation with a container for heating a heat transfer medium in a solar thermal power plant in a transparent representation
- FIG. 2 shows an inner wall of the container with bearing elements arranged thereon and counter bearing elements according to a first exemplary embodiment of the invention in an isometric view
- FIG. 3 shows an enlarged section of an inner wall of the container with bearing elements arranged thereon and counter bearing elements according to a second exemplary embodiment of the invention in an isometric view;
- FIG. 4 shows a detail from a row of bearing elements and counter-bearing elements according to the second exemplary embodiment of the invention from FIG. 3;
- FIG. 5 shows a container with an inner wall and an outer wall according to a third exemplary embodiment of the invention in a sectioned isometric representation
- FIG. 6 shows an enlarged section of the container with inner wall and outer wall according to the third exemplary embodiment of the invention from FIG. 5;
- FIG. 7 shows an enlarged section of an inner wall of the container with bearing elements arranged thereon and counter bearing elements according to the third exemplary embodiment of the invention in an isometric view
- FIG. 10 shows an enlarged illustration of the third exemplary embodiment with a view of sliding elements and insulating elements
- FIG. 11 shows an enlarged representation with a view of a fastening spring of a sliding element on a bearing element arranged on the inner wall;
- FIG. 12 is an enlarged view with a view of a
- FIG. 15 shows a counter bearing element according to the third exemplary embodiment of the invention in an isometric view with a view of the sliding element
- FIG. 16 shows the counter-bearing element according to FIG. 15 with a view of the fastening spring of the sliding element
- FIG. 17 shows the counter-bearing element according to FIG. 15 without the sliding element
- FIG. 18 shows a container with a polygonal outer shell according to a further exemplary embodiment of the invention.
- Figure 1 shows a receiver device 110 for solar radiation with a
- Container 200 for heating a heat transfer medium 210 in a solar thermal power plant in a transparent representation for heating a heat transfer medium 210 in a solar thermal power plant in a transparent representation.
- known receiver device 110 includes a container 200, which by means of a not shown
- rotary drive device can be rotated about an axis of rotation 216, and an inlet 300 for supplying the heat transfer medium 210 to an interior space 208 of the container 200 and an outlet 400 for discharging the heat transfer medium 210 from the container 200, both of which are connected to this container 200.
- the container 200 has a longitudinal axis 214 which is oriented parallel or at an acute angle of typically less than or equal to 90° to the direction of gravity g, which is symbolized in the figure by a vertical arrow.
- the container 200 comprises in particular a hollow-cylindrical base body which comprises the circular-cylindrical interior space 208 surrounded by an outer wall 206 .
- An inner wall 218 surrounding the interior space 208 is arranged at a distance from the outer wall 206 .
- the container 200 has thermal insulation between the outer wall 206 on the outside and the inner wall 218, so that temperatures of approx at least 900°C or higher, for example 1100°C.
- the receiver device 110 has an aperture opening 416 for the entry of solar radiation 112 at the lower end 204 of the container 200 .
- the container 200 can be rotated about an axis of rotation 216 in an intended direction of rotation 236 by means of a rotary drive device such that the heat transfer medium 210 is guided along the inner wall 218 of the container 200 with the formation of a heat transfer medium film 212 .
- the heat transfer medium 210 and the heat transfer medium film 212 are only indicated in FIG. 1 on the side of the inner wall 218 facing the interior space 208 .
- the axis of rotation 216 closes an angle with the direction of gravity g
- the container 200 is designed to be open, so that the aperture opening 416 of the container 200 is formed, through which solar radiation 112 can enter the interior 208 of the container 200 .
- the inner wall 218 of the container 200 is provided with a heat transfer medium 210 which is supplied via the inlet 300 through the feed opening 304 at the upper end 202 of the container 200 .
- the heat transfer medium 210 spreads on the inner wall 218 and thereby forms a heat transfer medium film 212.
- the heat transfer medium 210 is fed into the interior 208 of the container 200 via the inlet 300 which is arranged at the upper end 202 of the container 200 .
- the heat transfer medium 210 can be transported, in particular conveyed, along the inner wall 218 from the end 202 at which it is fed to an end 204 of the container 200 opposite this end 202, on which the aperture opening 416 is arranged, in order to create a continuous flow of heat transfer medium 210 to apply solar radiation 112 and thus to heat.
- the inlet 300 is formed from a cone-shaped front wall 302 and a cone-shaped rear wall 308 directed towards the interior 208 of the container 200, which are arranged coaxially and one above the other in the axial direction.
- a cone angle can be, for example, between 30° and 90°, preferably between 45° and 80°.
- Guide elements 310 are arranged between the front wall 302 and the rear wall 308 and are aligned in the radial direction 238 and are connected to the rear wall 308 .
- the guide elements 310 can also be connected to the inner wall 206 or alternately to the rear wall 308 and the inner wall 206 in an overlapping manner. In the prior art, these guide elements 310 are straight.
- the heat transfer medium 210 is arranged in a tip of the conical front wall 302 supply opening 304 in the
- the inner wall 218 of the container 200 usually has a friction-enhancing device 234, so that the heat transfer medium
- the heated heat transfer medium 210 adheres as well as possible to the inner wall 218 and thus has a sufficiently long residence time in the interior 208 in order to absorb sufficient heat from the solar radiation 112. The heated heat transfer medium 210 is then available for further
- the heat transfer medium 210 can advantageously be free-flowing or free-flowing.
- the heat transfer medium 210 can be formed by particles.
- the heat transfer medium 210 comprises particles or particles made of sintered bauxite or is formed from particles or particles made of sintered bauxite.
- the particles or particles can preferably have an average particle diameter of about 250 ⁇ m to about 1.8 mm.
- powdered media with much smaller grain sizes, such as cement flour can also be used.
- the particles preferably have a high sphericity.
- the sphericity ie the ratio of the surface area of a sphere of the same volume to the surface area of the particle, can in particular be greater than approximately 0.8, in particular greater than approximately 0.9.
- the particles or particles can be thermal shock resistant.
- the axis of rotation can be parallel or at an acute angle of less than or equal to 90°, preferably less than or equal to 80°, to the direction of gravity g.
- the axis of rotation can be coaxial with the longitudinal axis of the container.
- a heat transfer medium film 212 can form particularly favorably on the inner wall of the rotating container, so that the most uniform possible heat transfer to the heat transfer medium can be achieved.
- the container 200 can advantageously be made of steel. Due to the high temperatures of the heat transfer medium 210, the inner wall 218 is expediently made of a high-temperature-resistant stainless steel or another high-temperature alloy such as Inconel. Dimensions of the container 200 can be up to 8 m in length and 5 m in diameter, for example. The wall thickness of the inner wall 218 can be 6 mm, for example, while the outer wall 206 can have a wall thickness of 12 mm, for example. Such values can result in a weight of approximately 6 t up to 20 t for the container 200 with an associated thermal insulation between the inner wall 218 and the outer wall 206 .
- Ceramic fiber mats can advantageously be used as thermal insulation between the inner wall 218 and the outer wall 206 .
- Outer wall 206 may additionally include thermal insulation made of microporous fibers, which may be pressed into panels, on an outer side 240 .
- expansion values between the inner wall 218, which is heated to approx. 900° C. by the heat transfer medium 210, and the outer wall 206, which is at a temperature of approx. 100° C. can be up to 70 mm in the radial direction 238 and up to 150 mm occur in the longitudinal direction 215.
- FIG. 2 shows an inner wall 218 of the container 200 with bearing elements 10, 11 and counter bearing elements 30, 31 arranged thereon according to a first exemplary embodiment of the invention in an isometric representation.
- the container 200 has a double-walled housing 220 extending in a longitudinal direction 215, which surrounds an interior space 208 and which has an outer wall 206 (not shown) and an inner wall 218 surrounded by it, between which a large number of bearing elements 10, 11 and counter-bearing elements 30 , 31 is arranged.
- a double-walled housing 220 extending in a longitudinal direction 215, which surrounds an interior space 208 and which has an outer wall 206 (not shown) and an inner wall 218 surrounded by it, between which a large number of bearing elements 10, 11 and counter-bearing elements 30 , 31 is arranged.
- Counter bearing elements 30, 31 extend in a radial direction 238 away from the outer wall 206 and/or the inner wall 218.
- Abutment elements 30, 31 in at least the longitudinal direction 215 or in the circumferential direction 242 along at least one circumferential line 244 are arranged on one side butting against one another.
- bearing elements 10, 11 or counter-bearing elements 30, 31 are provided, which rest on opposite sides of the respectively corresponding counter-bearing element 30, 31 or bearing element 10, 11.
- bearing elements 11 and the corresponding counter-bearing elements 31 are alternately arranged on the inner wall 218 or the outer wall 206 in such a way that they act as floating bearings and are arranged so that they can move relative to one another in the radial direction 236 and the axial direction 215 and a relative movement in the circumferential direction 242 lock.
- bearing elements 10 and the corresponding counter-bearing elements 30 are arranged alternately on the inner wall 218 and the outer wall 206 in such a way that they act as a further floating bearing and are arranged so that they can move relative to one another in the radial direction 236 and in the circumferential direction 242 of the container 200 and Lock relative movement in the longitudinal direction 215 of the container 200.
- the two loose bearings act perpendicular to each other.
- This allows relative movement of the bearing elements 10, 11 and counter-bearing elements 30, 31 in the radial direction 236, but blocks in the circumferential direction 242 and in the longitudinal direction 215. In this way, a rotation of the inner wall 218 about the longitudinal axis 215 against the outer wall 206 is blocked in the area of the bearing elements 10, 11 arranged as floating bearings and corresponding counter-bearing elements 30, 31.
- a fixed bearing can be provided, for example, in a peripheral region of the container 200, for example closer to one end of the container 200.
- the bearing elements 10 arranged as a further movable bearing and corresponding counter-bearing elements 30, which form a fixed bearing with the first type of movable bearing there is a relative movement of the inner wall 218 against the outer wall 206 in the longitudinal direction 215 on a circumferential line 244 and a twisting of the inner wall 218 about the Longitudinal axis 215 locked against the outer wall 206.
- the bearing elements 10, 11 are designed as fins protruding in the radial direction 238 toward the outer wall 206, which in
- Circumferential direction 242 have at least one abutment surface 12 facing a corresponding counter-bearing element 30, as in
- the counter-bearing elements 30, 31 are designed as fins protruding in the radial direction 238 toward the inner wall 206, which fins have at least one corresponding one in each case in the circumferential direction 242
- Abutment elements 30, 31 can be screwed to the outer wall 206, for example.
- the counter-bearing elements 30, 31 can be designed as bent fins.
- a floating bearing of the inner wall 218 with respect to the outer wall 206 can be realized by arranging individual such fins as bearing elements 11 over the circumference 242 of the inner wall 218 on the inner wall. These fins can, for example, be drawn over the entire axial length 215 or divided over the axial length 215 and arranged several times individually. These fins serve as a sliding surface in the radial and axial directions.
- Drivers 32 can be arranged alternately in the axial direction on the sliding surfaces, which are fastened to the outer wall 206 as counter-bearing elements 31 .
- Circumferential direction 242 such an arrangement can also take place alternately. However, this is not absolutely necessary.
- the driver 32 with its contact surface 34 represents the active element of the counter-bearing element 30, 31 for the interaction of the bearing element
- the floating bearing Since the floating bearing is arranged over a large area in this way, its functionality for blocking a rotation of the inner wall 218 against the outer wall 206 in the circumferential direction 242 is also automatically provided in the area of the fixed bearing. Consequently, it is sufficient if a movement is only blocked in the longitudinal direction 215 at the fixed bearing.
- a web such as a type of stiffening ring 246 is arranged over the circumference of the inner wall 218 .
- This ring 246 can also be designed as several individual fins, but this time oriented in the circumferential direction.
- the ring 246 again serves as a sliding surface, this time only in the circumferential direction 242.
- Abutment elements 30 can be arranged to slide alternately on this ring 246 over the circumference, so that an axial movement of the inner wall 218 against the outer wall 206 is impeded.
- the counter bearing elements 30 are also connected to the outer wall 206 .
- a one-sided attachment of the counter-bearing elements 30 in the direction of gravity g can also suffice for a fixed bearing in the longitudinal direction 215 .
- the construction in the so-called fixed bearing area can be made correspondingly more compact.
- the counter-bearing elements 30, 31 can be designed as sheet metal strips bent at right angles, with one leg being connected to the outer wall 206 and the other leg being in contact with the bearing element 10, 11.
- a circumferential ring 246 is formed along the circumferential line 244 and is arranged radially between the outer wall 206 and the inner wall 218 and has or forms at least one bearing element 10 .
- the ring 246 is arranged on the inner wall 218 in this exemplary embodiment.
- the inner wall 218 is made up of individual longitudinal segments 250 joined together in the circumferential direction 242 , in particular arranged in a ring shape in the circumferential direction 242 and stacked in the longitudinal direction 215
- Longitudinal segments 250 formed.
- the longitudinal segments 250 are divided into axial segments 260 in the longitudinal direction 215 .
- Container 200 can be realized cheaply. Especially the integration of the bearing elements 10, 11 in the
- the bearing elements 11 are each arranged in the longitudinal direction 215 on the inner wall 218 and interact with the corresponding counter-bearing elements 31 arranged on the outer wall 206 .
- the bearing elements 11 and the corresponding counter-bearing elements 31 form the floating bearing between the inner wall 218 and the outer wall 206.
- the bearing elements 10 are each in the circumferential direction 242, with this
- Embodiment as a ring 246, arranged on the inner wall 218 and interact with the corresponding arranged on the outer wall 206 abutment elements 30 together.
- the floating bearings block a relative movement in the circumferential direction 242.
- the fixed bearing blocks a relative movement in the circumferential direction 242 and in the longitudinal direction 215.
- Figure 3 shows an enlarged section of an inner wall 218 of the container with bearing elements 10, 11 and counter-bearing elements 30, 31 arranged thereon according to a second exemplary embodiment of the invention in an isometric representation
- Figure 4 shows a section of a row of bearing elements 10, 11 and
- the counter-bearing elements 30, 31 have two legs 40, 42 which are arranged in particular at right angles to one another.
- One of the two legs 40 has a connecting surface 44 with the outer wall 206 and the other of the two legs 42 has the contact surface 34 .
- the counter-bearing elements 30 , 31 have a driver 32 that projects in the radial direction 238 and has at least one bearing surface 34 facing a corresponding bearing element 10 .
- the driver 32 is implemented by the second leg 42 .
- the two legs 40, 42 are connected by a strut 46 arranged diagonally between the ends of the legs 40, 42.
- the strut 46 can serve as an additional stiffening of the counter-bearing element 30, 31 in order in this way to be able to transmit greater forces between the bearing element 10, 11 and the counter-bearing element 30, 31.
- the forces that have to be transmitted can be up to 10 kN per counter-bearing element 30, 31 given the specified dimensions of the container 200.
- the contact surface 34 of the counter-bearing element 31 has a sliding element 36 , for example a ceramic plate, the surface of which is concave in relation to the contact surface 12 of the bearing element 11 .
- the concavely curved surface of the sliding element 36 facilitates assembly of the container 200 by the self-centering of bearing elements 10, 11 and counter-bearing elements 30, 31 in this way.
- movements of the inner wall 218 against the outer wall 206 due to thermal expansion, which can lead to shrinkage and growth in the diameter of the inner wall 218, can also be promoted.
- ceramic plates can also be introduced as sliding elements 14, 36 to protect the material.
- the abrasion of the material due to the movement of the bearing elements 10, 11 and counter-bearing elements 30, 31 due to the thermal expansion can thus be significantly reduced.
- the sliding element 14, 36 can also additionally act as thermal insulation.
- the material used for the sliding elements 14, 36 can be ceramic plates, for example made from Al 2 O 3 , SiC, ZrO 2 . Since the
- the longitudinal segments 250 and/or axial segments 260 have stiffening ribs 254 on a radial outside 240, in particular diagonal stiffening ribs 254.
- the mechanical stability of the inner wall 218 can be decisively increased by means of the stiffening ribs 254 . This allows great
- Figure 5 shows a container 200 with inner wall 218 and outer wall 206 according to a third embodiment of the invention in a truncated isometric view
- Figure 6 shows an enlarged section of container 200 according to Figure 5 from the area between inner wall 218 and outer wall 206.
- FIG. 7 shows an enlarged section of an inner wall 218 of the container 200 with bearing elements 10, 11 arranged thereon and counter-bearing elements 30, 31 according to the third exemplary embodiment of the invention in an isometric view.
- FIG. 8 shows a detail from a row of bearing elements 11 and counter bearing elements 31 according to the third exemplary embodiment of the invention.
- FIG. 9 shows an enlarged representation of the third exemplary embodiment according to FIG. 8 with a view of sliding elements 14, 36, while FIG. 10 shows an enlarged representation of the third exemplary embodiment with a view of
- Sliding elements 14, 36 and insulating elements 16 can be seen.
- the thermal loss of the receiving device 110 can be favorably reduced to a required level.
- the bearing elements 10, 11 are formed in one piece with the longitudinal segments 250, namely in that the bearing elements 10, 11 are formed by bending the longitudinal segments 250 along joining lines 252 of the longitudinal segments 250 to one another.
- Sliding element 14 in particular made of ceramic, is arranged.
- the sliding element 14 is arranged on the bearing element 10, 11, namely on the contact surface 12, while on the contact surface 34 of the
- a sliding element 36 in particular also made of ceramic, is arranged, which faces the corresponding bearing element 10, in particular the respective sliding element 14.
- the sliding element 36 has a concave curve in the radial direction 238 facing the respective corresponding sliding element 14
- an insulating element 16 for thermal insulation is arranged between the sliding element 14 and the contact surface 12 .
- Ceramic fiber mats can advantageously be used as insulating elements 16 .
- FIG. 11 shows an enlarged representation with a view of a
- the sliding element 14 of the bearing element 11 is connected to the respective bearing element 11 by means of a fastening element 18 which is designed in particular as a fastening spring 18 .
- the fastening spring 18 extends through an opening 22 in the bearing element 11 .
- Sliding elements 14, 36 and/or insulating elements 16 can thus be reliably and permanently connected to the bearing element 10, 11 or counter-bearing element 30, 31 by means of a fastening according to a tongue and groove concept. Shearing forces due to the thermal expansions of the inner wall 218 and the outer wall 206 relative to one another can also be appropriately absorbed in this way.
- the sliding elements 36 and insulating elements 16 can also be connected to the counter-bearing elements 30, 31 or the bearing elements 10, 11 in the same way.
- an additional thermal insulating element 16 is arranged between the contact surface 34 and the sliding element 36 of the counter-bearing element 31 .
- FIG. 12 shows an enlarged representation with a view of a fastening spring 38 of a sliding element 36 on a counter-bearing element 30, 31.
- the fastening spring 38 engages through a corresponding opening 48 in the second leg 42 of the counter-bearing element 30, 31.
- FIG. 13 shows an isometric representation of an arrangement of bearing elements 10, 11 and counter-bearing elements 30, 31, designed as a fixed bearing, of the third exemplary embodiment.
- the bearing elements 11 arranged in the longitudinal direction 214 can be seen with their corresponding counter-bearing elements 31, which form the movable bearing.
- the bearing elements 10 with their corresponding counter-bearing elements 30 can be seen, which together with the bearing elements 11 with their corresponding counter-bearing elements 31 form the fixed bearing.
- At crossing points of the peripheral line 244 with the running in the longitudinal direction 215 joining lines 252 of the longitudinal segments 250, or the axial segments 260 are two bearing elements 10 with counter bearing elements 30 and two bearing elements 11 with
- Abutment elements 31 are arranged crossed in such a way that a fixed bearing is formed and a relative movement of the inner wall 218 against the outer wall 206 in the longitudinal direction 215 and in the circumferential direction 242 is prevented
- the stiffening of the axial segments 260 by the diagonal struts 254 can also be seen in this representation.
- FIG. 14 shows an arrangement of a counter-bearing element 31 of the third exemplary embodiment on the outer jacket 206.
- One leg is here
- FIG. 40 of the counter-bearing element 31 is carried out through a window 248 arranged in the outer wall 206 and can be connected to the outer wall 206 from the outside.
- Figure 15 shows a counter bearing element 30 after the third
- FIG. 16 shows the counter bearing element 30 with a view of the fastening spring 38 of the sliding element 36 and FIG. 17 shows the counter bearing element 30 without the sliding element 36.
- FIG. 18 shows a container 200 with a polygonal outer casing 206 according to a further exemplary embodiment of the invention.
- the outer wall 206 is formed from flat longitudinal segments 256 which are joined along joining lines 258 formed in the longitudinal direction 215 .
- a polygonal outer shape of the outer wall 206 can prove to be particularly favorable in order to have flat surfaces on the outside 240 of the container 200 for connecting the counter-bearing elements 30, 31.
- the counter-bearing elements 30, 31 by a
- the advantage of constructing the outer wall 206 from flat longitudinal segments 256 is that many simple identical parts can be used. Since the bearing is sliding and therefore multi-part, assembly and subsequent maintenance are significantly simplified. Furthermore, the components are subject to a significantly lower load, since no constant deformations will occur as a result of the sliding, in contrast to a version with
- a polygenic outer wall 206 has the advantage that mechanical connections are possible in a simpler way. In the case of large containers 200, this also favors a multi-part structure. Reference sign
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- Sustainable Development (AREA)
- Sustainable Energy (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021117606.9A DE102021117606A1 (de) | 2021-07-07 | 2021-07-07 | Empfängervorrichtung für solarstrahlung mit einem behälter zum aufheizen eines wärmeträgermediums in einem solarthermischen kraftwerk |
| PCT/EP2022/068614 WO2023280871A1 (de) | 2021-07-07 | 2022-07-05 | Empfängervorrichtung für solarstrahlung mit einem behälter zum aufheizen eines wärmeträgermediums in einem solarthermischen kraftwerk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4367446A1 true EP4367446A1 (de) | 2024-05-15 |
Family
ID=82547503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22741498.4A Pending EP4367446A1 (de) | 2021-07-07 | 2022-07-05 | Empfängervorrichtung für solarstrahlung mit einem behälter zum aufheizen eines wärmeträgermediums in einem solarthermischen kraftwerk |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240318871A1 (de) |
| EP (1) | EP4367446A1 (de) |
| DE (1) | DE102021117606A1 (de) |
| WO (1) | WO2023280871A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20250003639A1 (en) * | 2023-06-30 | 2025-01-02 | Heliogen Holdings, Inc. | Modular inliner assembly for a centrifugal particle receiver |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4953480A (en) * | 1989-07-31 | 1990-09-04 | Westinghouse Electric Corp. | Rotary waterwall combustor with improved tire attachment |
| US5338188A (en) * | 1990-03-19 | 1994-08-16 | Cedarapids, Inc. | Radiant heat rotary volatilizer |
| DE102010062367A1 (de) * | 2010-12-02 | 2012-02-16 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Solarstrahlungsempfängervorrichtung und Verfahren zur solaren Erhitzung von Wärmeträgermedium |
| DE102010063116A1 (de) | 2010-12-15 | 2012-06-21 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Solarstrahlungsempfängervorrichtung |
| DE102014106320B4 (de) | 2014-05-06 | 2020-10-29 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Solarstrahlungsempfängervorrichtung |
| WO2021233526A1 (de) * | 2020-05-18 | 2021-11-25 | Helioheat Gmbh | Wärmeübertragervorrichtung, verfahren zum betreiben einer wärmeübertragervorrichtung und verfahren zum herstellen einer wärmeübertragervorrichtung |
-
2021
- 2021-07-07 DE DE102021117606.9A patent/DE102021117606A1/de active Pending
-
2022
- 2022-07-05 US US18/576,253 patent/US20240318871A1/en active Pending
- 2022-07-05 EP EP22741498.4A patent/EP4367446A1/de active Pending
- 2022-07-05 WO PCT/EP2022/068614 patent/WO2023280871A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021117606A1 (de) | 2023-01-12 |
| US20240318871A1 (en) | 2024-09-26 |
| WO2023280871A1 (de) | 2023-01-12 |
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